<?php

/**
 * @file
 * This module provides a simple way to create forms and questionnaires.
 *
 * The initial development of this module was sponsored by ÅF Industry AB, Open
 * Source City and Karlstad University Library. Continued development sponsored
 * by Lullabot.
 *
 * @author Nathan Haug <nate@lullabot.com>
 */

/**
 * Constants used in conditional logic.
 */
define('WEBFORM_CONDITIONAL_EXCLUDE', 0);
define('WEBFORM_CONDITIONAL_INCLUDE', 1);
define('WEBFORM_CONDITIONAL_SAME_PAGE', 2);

/**
 * Implements hook_help().
 */
function webform_help($section = 'admin/help#webform', $arg = NULL) {
  $output = '';
  switch ($section) {
    case 'admin/config/content/webform':
      module_load_include('inc', 'webform', 'includes/webform.admin');
      $type_list = webform_admin_type_list();
      $output = t('Webform enables nodes to have attached forms and questionnaires.');
      if ($type_list) {
        $output .= ' ' . t('To add one, create a !types piece of content.', array('!types' => $type_list));
      }
      else {
        $output .= ' <strong>' . t('Webform is currently not enabled on any content types.') . '</strong> ' . t('To use Webform, please enable it on at least one <a href="!url">content type</a>.', array('!url' => url('admin/structure/types')));
      }
      $output = '<p>' . $output . '</p>';
      break;

    case 'admin/content/webform':
      $output = '<p>' . t('This page lists all of the content on the site that may have a webform attached to it.') . '</p>';
      break;

    case 'admin/help#webform':
      module_load_include('inc', 'webform', 'includes/webform.admin');
      $types = webform_admin_type_list();
      if (empty($types)) {
        $types = t('Webform-enabled piece of content');
        $types_message = t('Webform is currently not enabled on any content types.') . ' ' . t('Visit the <a href="!url">Webform settings</a> page and enable Webform on at least one content type.', array('!url' => url('admin/config/content/webform')));
      }
      else {
        $types_message = t('Optional: Enable Webform on multiple types by visiting the <a href="!url">Webform settings</a> page.', array('!url' => url('admin/config/content/webform')));
      }
      $output = t("<p>This module lets you create forms or questionnaires and define their content. Submissions from these forms are stored in the database and optionally also sent by e-mail to a predefined address.</p>
      <p>Here is how to create one:</p>
      <ul>
        <li>!webform-types-message</li>
        <li>Go to <a href=\"!create-content\">Create content</a> and add a !types piece of content.</li>
        <li>After saving the new content, you will be redirected to the main field list of the form that will be created. Add the fields you would like on your form.</li>
        <li>Once finished adding fields, you may want to send e-mails to administrators or back to the user who filled out the form. Click on the <em>Emails</em> sub-tab underneath the <em>Webform</em> tab on the piece of content.</li>
        <li>Finally, visit the <em>Form settings</em> sub-tab under the <em>Webform</em> tab to configure remaining configurations options for your form.
          <ul>
          <li>Add a confirmation message and/or redirect URL that is to be displayed after successful submission.</li>
          <li>Set a submission limit.</li>
          <li>Determine which roles may submit the form.</li>
          <li>Advanced configuration options such as allowing drafts or show users a message indicating how they can edit their submissions.</li>
          </ul>
        </li>
        <li>Your form is now ready for viewing. After receiving submissions, you can check the results users have submitted by visiting the <em>Results</em> tab on the piece of content.</li>
      </ul>
      <p>Help on adding and configuring the components will be shown after you add your first component.</p>
      ", array(
        '!webform-types-message' => $types_message,
        '!create-content' => url('node/add'),
        '!types' => $types,
      )
      );
      break;

    case 'node/%/webform/conditionals':
      $output .= '<p>' . t('Conditionals may be used to hide or show certain components (or entire pages!) based on the value of other components.') . '</p>';
      break;

    case 'node/%/submission/%/resend':
      $output .= '<p>' . t('This form may be used to resend e-mails configured for this webform. Check the e-mails that need to be sent and click <em>Resend e-mails</em> to send these e-mails again.') . '</p>';
      break;
  }

  return $output;
}

/**
 * Implements hook_menu().
 */
function webform_menu() {
  $items = array();

  // Submissions listing.
  $items['admin/content/webform'] = array(
    'title' => 'Webforms',
    'page callback' => 'webform_admin_content',
    'access callback' => 'user_access',
    'access arguments' => array('access all webform results'),
    'description' => 'View and edit all the available webforms on your site.',
    'file' => 'includes/webform.admin.inc',
    'type' => MENU_LOCAL_TASK,
  );

  // Admin Settings.
  $items['admin/config/content/webform'] = array(
    'title' => 'Webform settings',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_admin_settings'),
    'access callback' => 'user_access',
    'access arguments' => array('administer site configuration'),
    'description' => 'Global configuration of webform functionality.',
    'file' => 'includes/webform.admin.inc',
    'type' => MENU_NORMAL_ITEM,
  );

  // Autocomplete used in Views integration.
  $items['webform/autocomplete'] = array(
    'title' => 'Webforms',
    'page callback' => 'webform_views_autocomplete',
    'access arguments' => array('administer views'),
    'file' => 'views/webform.views.inc',
    'type' => MENU_CALLBACK,
  );

  // Node page tabs.
  $items['node/%webform_menu/done'] = array(
    'title' => 'Webform confirmation',
    'page callback' => '_webform_confirmation',
    'page arguments' => array(1),
    'access callback' => 'webform_confirmation_page_access',
    'access arguments' => array(1),
    'type' => MENU_CALLBACK,
  );
  $items['node/%webform_menu/webform'] = array(
    'title' => 'Webform',
    'page callback' => 'webform_components_page',
    'page arguments' => array(1),
    'access callback' => 'webform_node_update_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.components.inc',
    'weight' => 1,
    'type' => MENU_LOCAL_TASK,
    'context' => MENU_CONTEXT_PAGE | MENU_CONTEXT_INLINE,
  );
  $items['node/%webform_menu/webform/components'] = array(
    'title' => 'Form components',
    'page callback' => 'webform_components_page',
    'page arguments' => array(1),
    'access callback' => 'webform_node_update_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.components.inc',
    'weight' => 0,
    'type' => MENU_DEFAULT_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform/conditionals'] = array(
    'title' => 'Conditionals',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_conditionals_form', 1),
    'access callback' => 'webform_node_update_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.conditionals.inc',
    'weight' => 1,
    'type' => MENU_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform/configure'] = array(
    'title' => 'Form settings',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_configure_form', 1),
    'access callback' => 'webform_node_update_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.pages.inc',
    'weight' => 5,
    'type' => MENU_LOCAL_TASK,
  );

  // Node e-mail forms.
  $items['node/%webform_menu/webform/emails'] = array(
    'title' => 'E-mails',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_emails_form', 1),
    'access callback' => 'webform_node_update_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.emails.inc',
    'weight' => 4,
    'type' => MENU_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform/emails/%webform_menu_email'] = array(
    'load arguments' => array(1),
    'page arguments' => array('webform_email_edit_form', 1, 4),
    'access callback' => 'webform_node_update_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.emails.inc',
    'type' => MENU_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform/emails/%webform_menu_email/clone'] = array(
    'load arguments' => array(1),
    'page arguments' => array('webform_email_edit_form', 1, 4, TRUE),
    'access callback' => 'webform_node_update_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.emails.inc',
    'type' => MENU_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform/emails/%webform_menu_email/delete'] = array(
    'load arguments' => array(1),
    'page arguments' => array('webform_email_delete_form', 1, 4),
    'access callback' => 'webform_node_update_access',
    'access arguments' => array(1),
    'type' => MENU_LOCAL_TASK,
  );

  // Node component forms.
  $items['node/%webform_menu/webform/components/%webform_menu_component'] = array(
    'load arguments' => array(1, 5),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_component_edit_form', 1, 4, FALSE),
    'access callback' => 'webform_node_update_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.components.inc',
    'type' => MENU_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform/components/%webform_menu_component/clone'] = array(
    'load arguments' => array(1, 5),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_component_edit_form', 1, 4, TRUE),
    'access callback' => 'webform_node_update_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.components.inc',
    'type' => MENU_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform/components/%webform_menu_component/delete'] = array(
    'load arguments' => array(1, 5),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_component_delete_form', 1, 4),
    'access callback' => 'webform_node_update_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.components.inc',
    'type' => MENU_LOCAL_TASK,
  );

  // AJAX callback for loading select list options.
  $items['webform/ajax/options/%webform_menu'] = array(
    'load arguments' => array(3),
    'page callback' => 'webform_select_options_ajax',
    'access callback' => 'webform_node_update_access',
    'access arguments' => array(3),
    'file' => 'components/select.inc',
    'type' => MENU_CALLBACK,
  );

  // Node webform results.
  $items['node/%webform_menu/webform-results'] = array(
    'title' => 'Results',
    'page callback' => 'webform_results_submissions',
    'page arguments' => array(1, FALSE, '50'),
    'access callback' => 'webform_results_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.report.inc',
    'weight' => 2,
    'type' => MENU_LOCAL_TASK,
    'context' => MENU_CONTEXT_PAGE | MENU_CONTEXT_INLINE,
  );
  $items['node/%webform_menu/webform-results/submissions'] = array(
    'title' => 'Submissions',
    'page callback' => 'webform_results_submissions',
    'page arguments' => array(1, FALSE, '50'),
    'access callback' => 'webform_results_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.report.inc',
    'weight' => 4,
    'type' => MENU_DEFAULT_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform-results/analysis'] = array(
    'title' => 'Analysis',
    'page callback' => 'webform_results_analysis',
    'page arguments' => array(1),
    'access callback' => 'webform_results_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.report.inc',
    'weight' => 5,
    'type' => MENU_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform-results/analysis/%webform_menu_component'] = array(
    'title' => 'Analysis',
    'load arguments' => array(1, 4),
    'page callback' => 'webform_results_analysis',
    'page arguments' => array(1, array(), 4),
    'access callback' => 'webform_results_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.report.inc',
    'type' => MENU_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform-results/analysis/%webform_menu_component/more'] = array(
    'title' => 'In-depth analysis',
    'type' => MENU_DEFAULT_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform-results/table'] = array(
    'title' => 'Table',
    'page callback' => 'webform_results_table',
    'page arguments' => array(1, '50'),
    'access callback' => 'webform_results_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.report.inc',
    'weight' => 6,
    'type' => MENU_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform-results/download'] = array(
    'title' => 'Download',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_results_download_form', 1),
    'access callback' => 'webform_results_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.report.inc',
    'weight' => 7,
    'type' => MENU_LOCAL_TASK,
  );
  $items['node/%webform_menu/webform-results/download-file'] = array(
    'title' => 'Download',
    'page callback' => 'webform_results_download_callback',
    'page arguments' => array(1),
    'access callback' => 'webform_results_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.report.inc',
    'type' => MENU_CALLBACK,
  );
  $items['node/%webform_menu/webform-results/clear'] = array(
    'title' => 'Clear',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_results_clear_form', 1),
    'access callback' => 'webform_results_clear_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.report.inc',
    'weight' => 8,
    'type' => MENU_LOCAL_TASK,
  );

  // Node submissions.
  $items['node/%webform_menu/submissions'] = array(
    'title' => 'Submissions',
    'page callback' => 'webform_results_submissions',
    'page arguments' => array(1, TRUE, '50'),
    'access callback' => 'webform_submission_access',
    'access arguments' => array(1, NULL, 'list'),
    'file' => 'includes/webform.report.inc',
    'type' => MENU_CALLBACK,
  );
  $items['node/%webform_menu/submission/%webform_menu_submission'] = array(
    'title' => 'Webform submission',
    'load arguments' => array(1),
    'page callback' => 'webform_submission_page',
    'page arguments' => array(1, 3, 'html'),
    'title callback' => 'webform_submission_title',
    'title arguments' => array(1, 3),
    'access callback' => 'webform_submission_access',
    'access arguments' => array(1, 3, 'view'),
    'file' => 'includes/webform.submissions.inc',
    'type' => MENU_CALLBACK,
  );
  $items['node/%webform_menu/submission/%webform_menu_submission/view'] = array(
    'title' => 'View',
    'load arguments' => array(1),
    'page callback' => 'webform_submission_page',
    'page arguments' => array(1, 3, 'html'),
    'access callback' => 'webform_submission_access',
    'access arguments' => array(1, 3, 'view'),
    'weight' => 0,
    'file' => 'includes/webform.submissions.inc',
    'type' => MENU_DEFAULT_LOCAL_TASK,
  );
  $items['node/%webform_menu/submission/%webform_menu_submission/edit'] = array(
    'title' => 'Edit',
    'load arguments' => array(1),
    'page callback' => 'webform_submission_page',
    'page arguments' => array(1, 3, 'form'),
    'access callback' => 'webform_submission_access',
    'access arguments' => array(1, 3, 'edit'),
    'weight' => 1,
    'file' => 'includes/webform.submissions.inc',
    'type' => MENU_LOCAL_TASK,
  );
  $items['node/%webform_menu/submission/%webform_menu_submission/delete'] = array(
    'title' => 'Delete',
    'load arguments' => array(1),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_submission_delete_form', 1, 3),
    'access callback' => 'webform_submission_access',
    'access arguments' => array(1, 3, 'delete'),
    'weight' => 2,
    'file' => 'includes/webform.submissions.inc',
    'type' => MENU_LOCAL_TASK,
  );
  $items['node/%webform_menu/submission/%webform_menu_submission/resend'] = array(
    'title' => 'Resend e-mails',
    'load arguments' => array(1),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_submission_resend', 1, 3),
    'access callback' => 'webform_results_access',
    'access arguments' => array(1),
    'file' => 'includes/webform.submissions.inc',
    'type' => MENU_CALLBACK,
  );

  // Devel integration for submissions.
  if (module_exists('devel')) {
    $items['node/%webform_menu/submission/%webform_menu_submission/devel'] = array(
      'title' => 'Devel',
      'load arguments' => array(1),
      'page callback' => 'devel_load_object',
      'page arguments' => array('submission', 3),
      'access arguments' => array('access devel information'),
      'type' => MENU_LOCAL_TASK,
      'file' => 'devel.pages.inc',
      'file path' => drupal_get_path('module', 'devel'),
      'weight' => 100,
    );
    $items['node/%webform_menu/submission/%webform_menu_submission/devel/load'] = array(
      'title' => 'Load',
      'type' => MENU_DEFAULT_LOCAL_TASK,
    );
    if (module_exists('token')) {
      $items['node/%webform_menu/submission/%webform_menu_submission/devel/token'] = array(
        'title' => 'Tokens',
        'load arguments' => array(1),
        'page callback' => 'token_devel_token_object',
        'page arguments' => array('webform-submission', 3, 'submission'),
        'access arguments' => array('access devel information'),
        'type' => MENU_LOCAL_TASK,
        'file' => 'token.pages.inc',
        'file path' => drupal_get_path('module', 'token'),
        'weight' => 5,
      );
    }
  }

  return $items;
}

/**
 * Menu loader callback. Load a webform node if the given nid is a webform.
 */
function webform_menu_load($nid) {
  if (!is_numeric($nid)) {
    return FALSE;
  }
  $node = node_load($nid);
  if (!isset($node->type) || !variable_get('webform_node_' . $node->type, FALSE)) {
    return FALSE;
  }
  return $node;
}

/**
 * Menu LOADERNAME_to_arg callback.
 *
 * Determines the arguments used to generate a menu link.
 *
 * This is implemented only to give the webform_localization modules an
 * opportunity to link to the orignial webform from the localized one. See
 * issue 2097277.
 *
 * @param string $arg
 *   The argument supplied by the caller.
 * @param array $map
 *   Array of path fragments (for example, array('node','123','edit') for
 *   'node/123/edit').
 * @param int $index
 *   Which element of $map corresponds to $arg.
 *
 * @return string
 *   The $arg, modified as desired.
 */
function webform_menu_to_arg($arg, array $map, $index) {
  return function_exists('webform_localization_webform_menu_to_arg')
          ? webform_localization_webform_menu_to_arg($arg, $map, $index)
          : $arg;
}

/**
 * Menu loader callback. Load a webform submission if the given sid is a valid.
 */
function webform_menu_submission_load($sid, $nid) {
  module_load_include('inc', 'webform', 'includes/webform.submissions');
  $submission = webform_get_submission($nid, $sid);
  return empty($submission) ? FALSE : $submission;
}

/**
 * Menu loader callback. Load a webform component if the given cid is a valid.
 */
function webform_menu_component_load($cid, $nid, $type) {
  module_load_include('inc', 'webform', 'includes/webform.components');
  if ($cid == 'new') {
    $components = webform_components();
    $component = in_array($type, array_keys($components)) ? array(
      'type' => $type,
      'nid' => $nid,
      'name' => $_GET['name'],
      'required' => $_GET['required'],
      'pid' => $_GET['pid'],
      'weight' => $_GET['weight'],
    ) : FALSE;
  }
  else {
    $node = node_load($nid);
    $component = isset($node->webform['components'][$cid]) ? $node->webform['components'][$cid] : FALSE;
  }
  if ($component) {
    webform_component_defaults($component);
  }
  return $component;
}

/**
 * Menu loader callback. Load a webform e-mail if the given eid is a valid.
 */
function webform_menu_email_load($eid, $nid) {
  module_load_include('inc', 'webform', 'includes/webform.emails');
  $node = node_load($nid);
  $email = webform_email_load($eid, $nid);
  if ($eid == 'new') {
    if (isset($_GET['option']) && isset($_GET['email'])) {
      $type = $_GET['option'];
      if ($type == 'custom') {
        $email['email'] = $_GET['email'];
      }
      elseif ($type == 'component' && isset($node->webform['components'][$_GET['email']])) {
        $email['email'] = $_GET['email'];
      }
    }
    if (isset($_GET['status'])) {
      $email['status'] = $_GET['status'];
    }
  }

  return $email;
}

/**
 * Return the access token for a submission.
 *
 * @param object $submission
 *   The submission object.
 *
 * @return string
 *   The access token for the submission.
 */
function webform_get_submission_access_token($submission) {
  return md5($submission->submitted . $submission->sid . drupal_get_private_key());
}

/**
 * Access function for confirmation pages.
 *
 * @param object $node
 *   The webform node object.
 *
 * @return bool
 *   Boolean whether the user has access to the confirmation page.
 */
function webform_confirmation_page_access($node) {
  global $user;

  // Make sure SID is a positive integer.
  $sid = (!empty($_GET['sid']) && (int) $_GET['sid'] > 0) ? (int) $_GET['sid'] : NULL;

  if ($sid) {
    module_load_include('inc', 'webform', 'includes/webform.submissions');
    $submission = webform_get_submission($node->nid, $sid);
  }
  else {
    $submission = NULL;
  }

  if ($submission) {
    // Logged-in users.
    if ($user->uid) {
      // User's own submission.
      if ($submission->uid === $user->uid && node_access('view', $node)) {
        return TRUE;
      }
      // User has results access to this submission.
      elseif (webform_submission_access($node, $submission)) {
        return TRUE;
      }
    }
    // Anonymous user for their own submission. Hash of submission data must
    // match the hash in the query string.
    elseif ((int) $user->uid === 0 && (int) $submission->uid === 0) {
      $hash_query = !empty($_GET['token']) ? $_GET['token'] : NULL;
      $hash = webform_get_submission_access_token($submission);
      if ($hash_query === $hash) {
        return TRUE;
      }
    }
  }
  else {
    // No submission exists (such as auto-deleted by another module, such as
    // webform_clear), just ensure that the user has access to view the node
    // page.
    if (node_access('view', $node)) {
      return TRUE;
    }
  }

  return FALSE;
}

/**
 * Access function for Webform submissions.
 *
 * @param object $node
 *   The webform node object.
 * @param object $submission
 *   The webform submission object.
 * @param object $op
 *   The operation to perform. Must be one of view, edit, delete, list.
 * @param object $account
 *   Optional. A user object or NULL to use the currently logged-in user.
 *
 * @return bool
 *   Boolean whether the user has access to a webform submission.
 */
function webform_submission_access($node, $submission, $op = 'view', $account = NULL) {
  global $user;
  $account = isset($account) ? $account : $user;

  $access_all = user_access('access all webform results', $account);
  $access_own_submission = isset($submission) && user_access('access own webform submissions', $account) && (($account->uid && $account->uid == $submission->uid) || isset($_SESSION['webform_submission'][$submission->sid]));
  $access_node_submissions = user_access('access own webform results', $account) && $account->uid == $node->uid;

  $token_access = $submission && isset($_GET['token']) && $_GET['token'] == webform_get_submission_access_token($submission);

  // If access is granted via a token, then allow subsequent submission access
  // for anonymous users.
  if (!$account->uid && $token_access) {
    $_SESSION['webform_submission'][$submission->sid] = $node->nid;
  }

  $general_access = $access_all || $access_own_submission || $access_node_submissions || $token_access;

  // Disable the page cache for anonymous users in this access callback,
  // otherwise the "Access denied" page gets cached.
  if (!$account->uid && user_access('access own webform submissions', $account)) {
    webform_disable_page_cache();
  }

  $module_access = count(array_filter(module_invoke_all('webform_submission_access', $node, $submission, $op, $account))) > 0;

  switch ($op) {
    case 'view':
      return $module_access || $general_access;

    case 'edit':
    case 'delete':
      return $module_access || (
        $general_access && (
          user_access($op . ' all webform submissions', $account) || (
            user_access($op . ' own webform submissions', $account) &&
            $account->uid == $submission->uid
          )
        )
      );

    case 'list':
      return $module_access ||
        user_access('access all webform results', $account) || (
          user_access('access own webform submissions', $account) && (
            $account->uid ||
            isset($_SESSION['webform_submission'])
          )
        ) || (
          user_access('access own webform results', $account) &&
          $account->uid == $node->uid
        );
  }
}

/**
 * Menu access callback. Ensure a user both access and node 'view' permission.
 */
function webform_results_access($node, $account = NULL) {
  global $user;
  $account = isset($account) ? $account : $user;

  $module_access = count(array_filter(module_invoke_all('webform_results_access', $node, $account))) > 0;

  return node_access('view', $node, $account) && ($module_access || user_access('access all webform results', $account) || (user_access('access own webform results', $account) && $account->uid == $node->uid));
}

/**
 * Menu access callback.
 *
 * Ensure a user has both results access and permission to clear submissions.
 */
function webform_results_clear_access($node, $account = NULL) {
  global $user;
  $account = isset($account) ? $account : $user;

  $module_access = count(array_filter(module_invoke_all('webform_results_clear_access', $node, $account))) > 0;

  return webform_results_access($node, $account) && ($module_access || user_access('delete all webform submissions', $account));
}

/**
 * Menu access callback. Ensure a sure has access to update a webform node.
 *
 * Unlike webform_results_access and webform_results_clear_access, access is
 * completely overridden by the any implementation of
 * hook_webform_update_access.
 *
 * If hook_webform_update_access is implemented by one or more other modules,
 * the results must be unanimously TRUE for access to be granted; otherwise it
 * is denied if even one implementation returns FALSE, regardless of node_access
 * and the 'edit webform components' permission. This allows implementors
 * complete flexibility.
 *
 * hook_webform_update_access should return TRUE if access should absolutely
 * be granted, FALSE if it should absolutely be denied, or NULL if node_access
 * and 'edit webform components' permission should determine access.
 *
 * @see hook_webform_update_access()
 */
function webform_node_update_access($node, $account = NULL) {
  global $user;
  $account = isset($account) ? $account : $user;
  $module_access = module_invoke_all('webform_update_access', $node, $account);
  return empty($module_access)
            ? node_access('update', $node, $account) && user_access('edit webform components')
            : count(array_filter($module_access)) == count($module_access);
}

/**
 * Implements hook_admin_paths().
 */
function webform_admin_paths() {
  if (variable_get('node_admin_theme')) {
    return array(
      'node/*/webform' => TRUE,
      'node/*/webform/*' => TRUE,
      'node/*/webform-results' => TRUE,
      'node/*/webform-results/*' => TRUE,
      'node/*/submission/*' => TRUE,
    );
  }
}

/**
 * Implements hook_perm().
 */
function webform_permission() {
  return array(
    'access all webform results' => array(
      'title' => t('Access all webform results'),
      'description' => t('Grants access to the "Results" tab on all webform content. Generally an administrative permission.'),
    ),
    'access own webform results' => array(
      'title' => t('Access own webform results'),
      'description' => t('Grants access to the "Results" tab to the author of webform content they have created.'),
    ),
    'edit all webform submissions' => array(
      'title' => t('Edit all webform submissions'),
      'description' => t('Allows editing of any webform submission by any user. Generally an administrative permission.'),
    ),
    'delete all webform submissions' => array(
      'title' => t('Delete all webform submissions'),
      'description' => t('Allows deleting of any webform submission by any user. Generally an administrative permission.'),
    ),
    'access own webform submissions' => array(
      'title' => t('Access own webform submissions'),
    ),
    'edit own webform submissions' => array(
      'title' => t('Edit own webform submissions'),
    ),
    'delete own webform submissions' => array(
      'title' => t('Delete own webform submissions'),
    ),
    'edit webform components' => array(
      'title' => t('Content authors: access and edit webform components and settings'),
      'description' => t('Grants additional access to the webform components and settings to users who can edit the content. Generally an authenticated user permission.'),
    ),
  );
}

/**
 * Implements hook_theme().
 */
function webform_theme() {
  $theme = array(
    // webform.module.
    'webform_view' => array(
      'render element' => 'webform',
    ),
    'webform_view_messages' => array(
      'variables' => array(
        'node' => NULL,
        'page' => NULL,
        'submission_count' => NULL,
        'user_limit_exceeded' => NULL,
        'total_limit_exceeded' => NULL,
        'allowed_roles' => NULL,
        'closed' => NULL,
        'cached' => NULL,
      ),
    ),
    'webform_form' => array(
      'render element' => 'form',
      'template' => 'templates/webform-form',
      'pattern' => 'webform_form_[0-9]+',
    ),
    'webform_confirmation' => array(
      'variables' => array('node' => NULL, 'sid' => NULL),
      'template' => 'templates/webform-confirmation',
      'pattern' => 'webform_confirmation_[0-9]+',
    ),
    'webform_element' => array(
      'render element' => 'element',
    ),
    'webform_element_text' => array(
      'render element' => 'element',
    ),
    'webform_inline_radio' => array(
      'render element' => 'element',
    ),
    'webform_inline_radio_label' => array(
      'render element' => 'element',
    ),
    'webform_progressbar' => array(
      'variables' => array(
        'node' => NULL,
        'page_num' => NULL,
        'page_count' => NULL,
        'page_labels' => array(),
      ),
      'template' => 'templates/webform-progressbar',
    ),
    'webform_mail_message' => array(
      'variables' => array(
        'node' => NULL,
        'submission' => NULL,
        'email' => NULL,
      ),
      'template' => 'templates/webform-mail',
      'pattern' => 'webform_mail(_[0-9]+)?',
    ),
    'webform_mail_headers' => array(
      'variables' => array(
        'node' => NULL,
        'submission' => NULL,
        'email' => NULL,
      ),
      'pattern' => 'webform_mail_headers_[0-9]+',
    ),
    'webform_token_help' => array(
      'variables' => array('groups' => array('node')),
    ),
    // webform.admin.inc.
    'webform_admin_settings' => array(
      'render element' => 'form',
      'file' => 'includes/webform.admin.inc',
    ),
    'webform_admin_content' => array(
      'variables' => array('nodes' => NULL),
      'file' => 'includes/webform.admin.inc',
    ),
    // webform.emails.inc.
    'webform_emails_form' => array(
      'render element' => 'form',
      'file' => 'includes/webform.emails.inc',
    ),
    'webform_email_component_mapping' => array(
      'render element' => 'element',
      'file' => 'includes/webform.emails.inc',
    ),
    'webform_email_add_form' => array(
      'render element' => 'form',
      'file' => 'includes/webform.emails.inc',
    ),
    'webform_email_edit_form' => array(
      'render element' => 'form',
      'file' => 'includes/webform.emails.inc',
    ),
    // webform.components.inc.
    'webform_components_page' => array(
      'variables' => array('node' => NULL, 'form' => NULL),
      'file' => 'includes/webform.components.inc',
    ),
    'webform_components_form' => array(
      'render element' => 'form',
      'file' => 'includes/webform.components.inc',
    ),
    'webform_component_select' => array(
      'render element' => 'element',
      'file' => 'includes/webform.components.inc',
    ),
    // webform.conditionals.inc.
    'webform_conditional_groups' => array(
      'render element' => 'element',
      'file' => 'includes/webform.conditionals.inc',
    ),
    'webform_conditional_group_row' => array(
      'render element' => 'element',
      'file' => 'includes/webform.conditionals.inc',
    ),
    'webform_conditional' => array(
      'render element' => 'element',
      'file' => 'includes/webform.conditionals.inc',
    ),
    // webform.pages.inc.
    'webform_advanced_redirection_form' => array(
      'render element' => 'form',
      'file' => 'includes/webform.pages.inc',
    ),
    'webform_advanced_submit_limit_form' => array(
      'render element' => 'form',
      'file' => 'includes/webform.pages.inc',
    ),
    'webform_advanced_total_submit_limit_form' => array(
      'render element' => 'form',
      'file' => 'includes/webform.pages.inc',
    ),
    // webform.report.inc.
    'webform_results_per_page' => array(
      'variables' => array('total_count' => NULL, 'pager_count' => NULL),
      'file' => 'includes/webform.report.inc',
    ),
    'webform_results_submissions_header' => array(
      'variables' => array('node' => NULL),
      'file' => 'includes/webform.report.inc',
    ),
    'webform_results_submissions' => array(
      'render element' => 'element',
      'template' => 'templates/webform-results-submissions',
      'file' => 'includes/webform.report.inc',
    ),
    'webform_results_table_header' => array(
      'variables' => array('node' => NULL),
      'file' => 'includes/webform.report.inc',
    ),
    'webform_results_table' => array(
      'variables' => array(
        'node' => NULL,
        'components' => NULL,
        'submissions' => NULL,
        'total_count' => NULL,
        'pager_count' => NULL,
      ),
      'file' => 'includes/webform.report.inc',
    ),
    'webform_results_download_range' => array(
      'render element' => 'element',
      'file' => 'includes/webform.report.inc',
    ),
    'webform_results_download_select_format' => array(
      'render element' => 'element',
      'file' => 'includes/webform.report.inc',
    ),
    'webform_analysis' => array(
      'render element' => 'analysis',
      'template' => 'templates/webform-analysis',
      'file' => 'includes/webform.report.inc',
    ),
    'webform_analysis_component' => array(
      'render element' => 'component_analysis',
      'template' => 'templates/webform-analysis-component',
      'file' => 'includes/webform.report.inc',
    ),
    'webform_analysis_component_basic' => array(
      'variables' => array('component' => NULL, 'data' => NULL),
      'file' => 'includes/webform.report.inc',
    ),
    // webform.submissions.inc.
    'webform_submission' => array(
      'render element' => 'renderable',
      'template' => 'templates/webform-submission',
      'pattern' => 'webform_submission_[0-9]+',
      'file' => 'includes/webform.submissions.inc',
    ),
    'webform_submission_page' => array(
      'variables' => array(
        'node' => NULL,
        'submission' => NULL,
        'submission_content' => NULL,
        'submission_navigation' => NULL,
        'submission_information' => NULL,
        'submission_actions' => NULL,
        'mode' => NULL,
      ),
      'template' => 'templates/webform-submission-page',
      'file' => 'includes/webform.submissions.inc',
    ),
    'webform_submission_information' => array(
      'variables' => array(
        'node' => NULL,
        'submission' => NULL,
        'mode' => 'display',
      ),
      'template' => 'templates/webform-submission-information',
      'file' => 'includes/webform.submissions.inc',
    ),
    'webform_submission_navigation' => array(
      'variables' => array('node' => NULL, 'submission' => NULL, 'mode' => NULL),
      'template' => 'templates/webform-submission-navigation',
      'file' => 'includes/webform.submissions.inc',
    ),
    'webform_submission_resend' => array(
      'render element' => 'form',
      'file' => 'includes/webform.submissions.inc',
    ),
  );

  // Theme functions in all components.
  $components = webform_components(TRUE);
  foreach ($components as $type => $component) {
    if ($theme_additions = webform_component_invoke($type, 'theme')) {
      $theme = array_merge($theme, $theme_additions);
    }
  }
  return $theme;
}

/**
 * Implements hook_library().
 */
function webform_library() {
  $module_path = drupal_get_path('module', 'webform');

  // Webform administration.
  $libraries['admin'] = array(
    'title' => 'Webform: Administration',
    'website' => 'http://drupal.org/project/webform',
    'version' => '1.0',
    'js' => array(
      $module_path . '/js/webform-admin.js' => array('group' => JS_DEFAULT),
    ),
    'css' => array(
      $module_path . '/css/webform-admin.css' => array('group' => CSS_DEFAULT, 'weight' => 1),
    ),
  );

  return $libraries;
}

/**
 * Implements hook_element_info().
 */
function webform_element_info() {
  // A few of our components need to be defined here because Drupal does not
  // provide these components natively. Because this hook fires on every page
  // load (even on non-webform pages), we don't put this in the component .inc
  // files because of the unnecessary loading that it would require.
  $elements['webform_time'] = array('#input' => 'TRUE');
  $elements['webform_grid'] = array('#input' => 'TRUE');

  $elements['webform_email'] = array(
    '#input' => TRUE,
    '#theme' => 'webform_email',
    '#size' => 60,
  );
  $elements['webform_number'] = array(
    '#input' => TRUE,
    '#theme' => 'webform_number',
    '#min' => NULL,
    '#max' => NULL,
    '#step' => NULL,
  );

  $elements['webform_conditional'] = array(
    '#input' => TRUE,
    '#theme' => 'webform_conditional',
    '#default_value' => NULL,
    '#process' => array('webform_conditional_expand'),
  );

  return $elements;
}

/**
 * Implements hook_webform_component_info().
 */
function webform_webform_component_info() {
  $component_info = array(
    'date' => array(
      'label' => t('Date'),
      'description' => t('Presents month, day, and year fields.'),
      'features' => array(
        'views_range' => TRUE,
        'css_classes' => FALSE,
      ),
      'file' => 'components/date.inc',
      'conditional_type' => 'date',
    ),
    'email' => array(
      'label' => t('E-mail'),
      'description' => t('A special textfield that accepts e-mail addresses.'),
      'file' => 'components/email.inc',
      'features' => array(
        'email_address' => TRUE,
        'spam_analysis' => TRUE,
        'placeholder' => TRUE,
        'conditional_action_set' => TRUE,
      ),
    ),
    'fieldset' => array(
      'label' => t('Fieldset'),
      'description' => t('Fieldsets allow you to organize multiple fields into groups.'),
      'features' => array(
        'csv' => FALSE,
        'default_value' => FALSE,
        'required' => FALSE,
        'conditional' => FALSE,
        'group' => TRUE,
        'title_inline' => FALSE,
        'wrapper_classes' => FALSE,
      ),
      'file' => 'components/fieldset.inc',
    ),
    'grid' => array(
      'label' => t('Grid'),
      'description' => t('Allows creation of grid questions, denoted by radio buttons.'),
      'features' => array(
        'default_value' => FALSE,
        'title_inline' => FALSE,
        'title_internal' => TRUE,
        'css_classes' => FALSE,
        'conditional' => FALSE,
        'group' => TRUE,
      ),
      'file' => 'components/grid.inc',
    ),
    'hidden' => array(
      'label' => t('Hidden'),
      'description' => t('A field which is not visible to the user, but is recorded with the submission.'),
      'file' => 'components/hidden.inc',
      'features' => array(
        'required' => FALSE,
        'description' => FALSE,
        'email_address' => TRUE,
        'email_name' => TRUE,
        'title_display' => FALSE,
        'private' => FALSE,
        'wrapper_classes' => FALSE,
        'css_classes' => FALSE,
        'conditional_action_set' => TRUE,
      ),
    ),
    'markup' => array(
      'label' => t('Markup'),
      'description' => t('Displays text as HTML in the form; does not render a field.'),
      'features' => array(
        'analysis' => FALSE,
        'csv' => FALSE,
        'default_value' => FALSE,
        'description' => FALSE,
        'email' => FALSE,
        'required' => FALSE,
        'conditional' => FALSE,
        'title_display' => FALSE,
        'private' => FALSE,
        'wrapper_classes' => FALSE,
        'css_classes' => FALSE,
        'conditional_action_set' => TRUE,
      ),
      'file' => 'components/markup.inc',
    ),
    'number' => array(
      'label' => t('Number'),
      'description' => t('A numeric input field (either as textfield or select list).'),
      'features' => array(
        'conditional_action_set' => TRUE,
      ),
      'file' => 'components/number.inc',
      'conditional_type' => 'numeric',
    ),
    'pagebreak' => array(
      'label' => t('Page break'),
      'description' => t('Organize forms into multiple pages.'),
      'features' => array(
        'analysis' => FALSE,
        'conditional' => FALSE,
        'csv' => FALSE,
        'default_value' => FALSE,
        'description' => FALSE,
        'private' => FALSE,
        'required' => FALSE,
        'title_display' => FALSE,
        'wrapper_classes' => FALSE,
        'css_classes' => FALSE,
      ),
      'file' => 'components/pagebreak.inc',
    ),
    'select' => array(
      'label' => t('Select options'),
      'description' => t('Allows creation of checkboxes, radio buttons, or select menus.'),
      'file' => 'components/select.inc',
      'features' => array(
        'default_value' => FALSE,
        'email_address' => TRUE,
        'email_name' => TRUE,
        'conditional_action_set' => TRUE,
      ),
      'conditional_type' => 'select',
    ),
    'textarea' => array(
      'label' => t('Textarea'),
      'description' => t('A large text area that allows for multiple lines of input.'),
      'file' => 'components/textarea.inc',
      'features' => array(
        'spam_analysis' => TRUE,
        'placeholder' => TRUE,
        'conditional_action_set' => TRUE,
      ),
    ),
    'textfield' => array(
      'label' => t('Textfield'),
      'description' => t('Basic textfield type.'),
      'file' => 'components/textfield.inc',
      'features' => array(
        'email_name' => TRUE,
        'spam_analysis' => TRUE,
        'placeholder' => TRUE,
        'conditional_action_set' => TRUE,
      ),
    ),
    'time' => array(
      'label' => t('Time'),
      'description' => t('Presents the user with hour and minute fields. Optional am/pm fields.'),
      'features' => array(
        'views_range' => TRUE,
        'css_classes' => FALSE,
      ),
      'file' => 'components/time.inc',
      'conditional_type' => 'time',
    ),
  );

  if (module_exists('file')) {
    $component_info['file'] = array(
      'label' => t('File'),
      'description' => t('Allow users to upload files of configurable types.'),
      'features' => array(
        'conditional' => FALSE,
        'default_value' => FALSE,
        'attachment' => TRUE,
        'file_usage' => TRUE,
      ),
      'file' => 'components/file.inc',
    );
  }

  return $component_info;
}

/**
 * Implements hook_webform_conditional_operator_info().
 */
function webform_webform_conditional_operator_info() {
  module_load_include('inc', 'webform', 'includes/webform.conditionals');
  return _webform_conditional_operator_info();
}

/**
 * Implements hook_forms().
 *
 * All webform_client_form forms share the same form handler.
 */
function webform_forms($form_id) {
  $forms = array();
  if (strpos($form_id, 'webform_client_form_') === 0) {
    $forms[$form_id]['callback'] = 'webform_client_form';
  }
  return $forms;
}

/**
 * Implements hook_webform_select_options_info().
 */
function webform_webform_select_options_info() {
  module_load_include('inc', 'webform', 'includes/webform.options');
  return _webform_options_info();
}

/**
 * Implements hook_webform_webform_submission_actions().
 */
function webform_webform_submission_actions($node, $submission) {
  $actions = array();
  $destination = drupal_get_destination();

  if (module_exists('print_pdf') && user_access('access PDF version')) {
    $actions['printpdf'] = array(
      'title' => t('Download PDF'),
      'href' => 'printpdf/' . $node->nid . '/submission/' . $submission->sid,
      'query' => $destination,
    );
  }

  if (module_exists('print') && user_access('access print')) {
    $actions['print'] = array(
      'title' => t('Print'),
      'href' => 'print/' . $node->nid . '/submission/' . $submission->sid,
    );
  }

  if (webform_results_access($node) && count($node->webform['emails'])) {
    $actions['resend'] = array(
      'title' => t('Resend e-mails'),
      'href' => 'node/' . $node->nid . '/submission/' . $submission->sid . '/resend',
      'query' => drupal_get_destination(),
    );
  }

  return $actions;
}

/**
 * Implements hook_webform_submission_presave().
 *
 * We implement our own hook here to facilitate the File component, which needs
 * to clean up manage file usage records and delete files from submissions that
 * have been edited if necessary.
 */
function webform_webform_submission_presave($node, &$submission) {
  // Check if there are any file components in this submission and if any of
  // them currently contain files.
  $has_file_components = FALSE;
  $new_fids = array();
  $old_fids = array();
  $renameable = array();

  foreach ($node->webform['components'] as $cid => $component) {
    if (webform_component_feature($component['type'], 'file_usage')) {
      $has_file_components = TRUE;
      if (!empty($submission->data[$cid])) {
        foreach ($submission->data[$cid] as $key => $value) {
          if (empty($value)) {
            unset($submission->data[$cid][$key]);
          }
          if (strlen($component['extra']['rename'])) {
            $renameable[$cid][] = $value;
          }
        }
        $new_fids = array_merge($new_fids, $submission->data[$cid]);
      }
    }
  }

  if ($has_file_components) {
    // If we're updating a submission, build a list of previous files.
    if (isset($submission->sid)) {
      drupal_static_reset('webform_get_submission');
      $old_submission = webform_get_submission($node->nid, $submission->sid);

      foreach ($node->webform['components'] as $cid => $component) {
        if (webform_component_feature($component['type'], 'file_usage')) {
          if (!empty($old_submission->data[$cid])) {
            $old_fids = array_merge($old_fids, $old_submission->data[$cid]);
          }
        }
      }
    }

    // Only rename files if this is the first time the submission is being saved
    // as finished.
    if ($submission->is_draft || (isset($old_submission) && !$old_submission->is_draft)) {
      $renameable = array();
    }

    // Save the list of added or removed files so we can add usage in
    // hook_webform_submission_insert() or _update().
    $submission->file_usage = array(
      // Diff the old against new to determine what files were deleted.
      'deleted_fids' => array_diff($old_fids, $new_fids),
      // Diff the new files against old to determine new uploads.
      'added_fids' => array_diff($new_fids, $old_fids),
      // A list of files which need renaming with tokens.
      'renameable' => $renameable,
    );
  }
}

/**
 * Implements hook_webform_submission_insert().
 */
function webform_webform_submission_insert($node, $submission) {
  if (isset($submission->file_usage)) {
    webform_component_include('file');
    webform_file_usage_adjust($submission);
    webform_file_rename($node, $submission);
  }
}

/**
 * Implements hook_webform_submission_update().
 */
function webform_webform_submission_update($node, $submission) {
  if (isset($submission->file_usage)) {
    webform_component_include('file');
    webform_file_usage_adjust($submission);
    webform_file_rename($node, $submission);
  }
}

/**
 * Implements hook_webform_submission_render_alter().
 */
function webform_webform_submission_render_alter(&$renderable) {
  // If displaying a submission to end-users who are viewing their own
  // submissions (and not through an e-mail), do not show hidden values.
  // This needs to be implemented at the level of the entire submission, since
  // individual components do not get contextual information about where they
  // are being displayed.
  $node = $renderable['#node'];
  $is_admin = webform_results_access($node);
  if (empty($renderable['#email']) && !$is_admin) {
    // Find and hide the display of all hidden components.
    module_load_include('inc', 'webform', 'includes/webform.components');
    foreach ($node->webform['components'] as $cid => $component) {
      if ($component['type'] == 'hidden') {
        $parents = webform_component_parent_keys($node, $component);
        $element = &$renderable;
        foreach ($parents as $pid) {
          $element = &$element[$pid];
        }
        $element['#access'] = FALSE;
      }
    }
  }
}

/**
 * Implements hook_file_download().
 *
 * Only allow users with view webform submissions to download files.
 */
function webform_file_download($uri) {
  module_load_include('inc', 'webform', 'includes/webform.submissions');

  // Determine whether this file was a webform upload.
  $row = db_query("SELECT fu.id as sid, f.fid FROM {file_managed} f LEFT JOIN {file_usage} fu ON f.fid = fu.fid AND fu.module = :webform AND fu.type = :submission WHERE f.uri = :uri", array('uri' => $uri, ':webform' => 'webform', ':submission' => 'submission'))->fetchObject();
  if ($row) {
    $file = file_load($row->fid);
  }
  if (!empty($row->sid)) {
    $submissions = webform_get_submissions(array('sid' => $row->sid));
    $submission = reset($submissions);
  }

  // Grant or deny file access based on access to the submission.
  if (!empty($submission)) {
    $node = node_load($submission->nid);
    if (webform_submission_access($node, $submission)) {
      return file_get_content_headers($file);
    }
    else {
      return -1;
    }
  }
  // Grant access to files uploaded by a user before the submission is saved.
  elseif (!empty($file) && !empty($_SESSION['webform_files'][$file->fid])) {
    return file_get_content_headers($file);
  }

  // Ensure we never completely ignore a webform file request.
  if (strpos(file_uri_target($uri), 'webform/') === 0) {
    // The file is not part of a submission or a submission-in-progress (by
    // the current user), however it may be part of a submission-in-progress
    // (or an abandoned submission) by another user. We assume that all files
    // under our enforced directory prefix are in fact webform files, and so
    // we deny access to the file. Abandoned uploads will be deleted by
    // system_cron() in due course.
    return -1;
  }
}

/**
 * Return all content type enabled with webform.
 *
 * @return array
 *   An array of node type names.
 */
function webform_node_types() {
  $types = &drupal_static(__FUNCTION__, NULL);
  if (!isset($types)) {
    $types = array();
    foreach (node_type_get_names() as $type => $name) {
      if (variable_get('webform_node_' . $type, FALSE)) {
        $types[] = $type;
      }
    }
  }
  return $types;
}

/**
 * Implements hook_node_type_delete().
 */
function webform_node_type_delete($info) {
  variable_del('webform_node_' . $info->type);
}

/**
 * Implements hook_node_insert().
 */
function webform_node_insert($node) {
  if (!variable_get('webform_node_' . $node->type, FALSE)) {
    return;
  }

  // If added directly through node_save(), set defaults for the node.
  if (!isset($node->webform)) {
    $node->webform = array();
  }

  // Ensure values for all defaults are provided. Useful for importing from
  // older versions into newer ones.
  $node->webform += webform_node_defaults();

  // Do not make an entry if this node does not have any Webform settings.
  if ($node->webform == webform_node_defaults() && !in_array($node->type, webform_variable_get('webform_node_types_primary'))) {
    return;
  }

  module_load_include('inc', 'webform', 'includes/webform.components');
  module_load_include('inc', 'webform', 'includes/webform.conditionals');
  module_load_include('inc', 'webform', 'includes/webform.emails');

  // Prepare the record for writing.
  $node->webform['nid'] = $node->nid;
  $webform_record = $node->webform;
  $webform_record['preview_excluded_components'] = implode(',', $webform_record['preview_excluded_components']);

  // Insert the webform.
  $node->webform['record_exists'] = (bool) drupal_write_record('webform', $webform_record);

  // Insert the components into the database. Used with clone.module.
  if (isset($node->webform['components']) && !empty($node->webform['components'])) {
    foreach ($node->webform['components'] as $cid => $component) {
      // Required for clone.module.
      $component['nid'] = $node->nid;
      webform_component_insert($component);
    }
  }

  // Insert conditionals. Also used with clone.module.
  if (isset($node->webform['conditionals']) && !empty($node->webform['conditionals'])) {
    foreach ($node->webform['conditionals'] as $rgid => $conditional) {
      $conditional['nid'] = $node->nid;
      $conditional['rgid'] = $rgid;
      webform_conditional_insert($conditional);
    }
  }

  // Insert emails. Also used with clone.module.
  if (isset($node->webform['emails']) && !empty($node->webform['emails'])) {
    foreach ($node->webform['emails'] as $eid => $email) {
      $email['nid'] = $node->nid;
      webform_email_insert($email);
    }
  }

  // Set the per-role submission access control.
  foreach (array_filter($node->webform['roles']) as $rid) {
    db_insert('webform_roles')->fields(array('nid' => $node->nid, 'rid' => $rid))->execute();
  }

  // Flush the block cache if creating a block.
  if (module_exists('block') && $node->webform['block']) {
    block_flush_caches();
  }
}

/**
 * Implements hook_node_update().
 */
function webform_node_update($node) {
  if (!variable_get('webform_node_' . $node->type, FALSE)) {
    return;
  }

  // Check if this node needs a webform record at all. If it matches the
  // defaults, any existing record will be deleted.
  webform_check_record($node);

  // If a webform row doesn't even exist, we can assume it needs to be inserted.
  // If the the webform matches the defaults, no row will be inserted.
  if (!$node->webform['record_exists']) {
    webform_node_insert($node);
    return;
  }

  // Prepare the record for writing.
  $node->webform['nid'] = $node->nid;
  $webform_record = $node->webform;
  $webform_record['preview_excluded_components'] = implode(',', $webform_record['preview_excluded_components']);

  // Update the webform entry.
  drupal_write_record('webform', $webform_record, array('nid'));

  // Compare the webform components and don't do anything if it's not needed.
  $original = $node->original;

  if ($original->webform['components'] != $node->webform['components']) {
    module_load_include('inc', 'webform', 'includes/webform.components');

    $original_cids = array_keys($original->webform['components']);
    $current_cids = array_keys($node->webform['components']);

    $all_cids = array_unique(array_merge($original_cids, $current_cids));
    $deleted_cids = array_diff($original_cids, $current_cids);
    $inserted_cids = array_diff($current_cids, $original_cids);

    foreach ($all_cids as $cid) {
      $node->webform['components'][$cid]['nid'] = $node->nid;
      if (in_array($cid, $inserted_cids)) {
        webform_component_insert($node->webform['components'][$cid]);
      }
      elseif (in_array($cid, $deleted_cids)) {
        // Delete components only after all updates have been processed.
      }
      elseif ($node->webform['components'][$cid] != $original->webform['components'][$cid]) {
        webform_component_update($node->webform['components'][$cid]);
      }
    }

    // Delete components now that any parent changes have been saved. When
    // components are moved and deleted in one operation in FormBuilder, this
    // ensures that only the current children are deleted.
    foreach ($deleted_cids as $cid) {
      webform_component_delete($node, $original->webform['components'][$cid]);
    }
  }

  // Compare the webform conditionals and don't do anything if it's not needed.
  if ($original->webform['conditionals'] != $node->webform['conditionals']) {
    module_load_include('inc', 'webform', 'includes/webform.conditionals');

    // Conditionals don't have unique site-wide IDs or configuration, so our
    // update here is a bit more aggressive than for components and e-mails.
    // Delete any conditionals no longer in the webform or that have changed.
    foreach ($original->webform['conditionals'] as $rgid => $conditional) {
      if (!isset($node->webform['conditionals'][$rgid]) || $conditional != $node->webform['conditionals'][$rgid]) {
        webform_conditional_delete($node, $conditional);
      }
    }
    // Insert any conditionals not in the original or that have changed.
    foreach ($node->webform['conditionals'] as $rgid => $conditional) {
      $conditional['nid'] = $node->nid;
      $conditional['rgid'] = $rgid;
      if (!isset($original->webform['conditionals'][$rgid]) || $original->webform['conditionals'][$rgid] != $conditional) {
        webform_conditional_insert($conditional);
      }
    }
  }

  // Compare the webform e-mails and don't do anything if it's not needed.
  if ($original->webform['emails'] != $node->webform['emails']) {
    module_load_include('inc', 'webform', 'includes/webform.emails');

    $original_eids = array_keys($original->webform['emails']);
    $current_eids = array_keys($node->webform['emails']);

    $all_eids = array_unique(array_merge($original_eids, $current_eids));
    $deleted_eids = array_diff($original_eids, $current_eids);
    $inserted_eids = array_diff($current_eids, $original_eids);

    foreach ($all_eids as $eid) {
      $node->webform['emails'][$eid]['nid'] = $node->nid;
      if (in_array($eid, $inserted_eids)) {
        webform_email_insert($node->webform['emails'][$eid]);
      }
      elseif (in_array($eid, $deleted_eids)) {
        webform_email_delete($node, $original->webform['emails'][$eid]);
      }
      elseif ($node->webform['emails'][$eid] != $original->webform['emails'][$eid]) {
        webform_email_update($node->webform['emails'][$eid]);
      }
    }
  }

  // Just delete and re-insert roles if they've changed.
  if ($original->webform['roles'] != $node->webform['roles']) {
    db_delete('webform_roles')->condition('nid', $node->nid)->execute();
    foreach (array_filter($node->webform['roles']) as $rid) {
      db_insert('webform_roles')->fields(array('nid' => $node->nid, 'rid' => $rid))->execute();
    }
  }

  // Flush the block cache if block settings have been changed.
  if (function_exists('block_flush_caches') && $node->webform['block'] != $original->webform['block']) {
    block_flush_caches();
  }
}

/**
 * Implements hook_node_delete().
 */
function webform_node_delete($node) {
  if (!variable_get('webform_node_' . $node->type, FALSE)) {
    return;
  }

  // Allow components clean up extra data, such as uploaded files.
  module_load_include('inc', 'webform', 'includes/webform.components');
  foreach ($node->webform['components'] as $cid => $component) {
    webform_component_delete($node, $component);
  }

  // Remove any trace of webform data from the database.
  db_delete('webform')->condition('nid', $node->nid)->execute();
  db_delete('webform_component')->condition('nid', $node->nid)->execute();
  db_delete('webform_conditional')->condition('nid', $node->nid)->execute();
  db_delete('webform_conditional_rules')->condition('nid', $node->nid)->execute();
  db_delete('webform_conditional_actions')->condition('nid', $node->nid)->execute();
  db_delete('webform_emails')->condition('nid', $node->nid)->execute();
  db_delete('webform_roles')->condition('nid', $node->nid)->execute();
  db_delete('webform_submissions')->condition('nid', $node->nid)->execute();
  db_delete('webform_submitted_data')->condition('nid', $node->nid)->execute();
  db_delete('webform_last_download')->condition('nid', $node->nid)->execute();
}

/**
 * Default settings for a newly created webform node.
 */
function webform_node_defaults() {
  $progress_bar_defaults = webform_variable_get('webform_progressbar_style');
  $defaults = array(
    'confirmation' => '',
    'confirmation_format' => NULL,
    'redirect_url' => '<confirmation>',
    'block' => '0',
    'allow_draft' => '0',
    'auto_save' => '0',
    'confidential' => '0',
    'submit_notice' => '1',
    'submit_text' => '',
    'next_serial' => 1,
    'submit_limit' => '-1',
    'submit_interval' => '-1',
    'total_submit_limit' => '-1',
    'total_submit_interval' => '-1',
    'progressbar_page_number' => in_array('progressbar_page_number', $progress_bar_defaults) ? '1' : '0',
    'progressbar_percent' => in_array('progressbar_percent', $progress_bar_defaults) ? '1' : '0',
    'progressbar_bar' => in_array('progressbar_bar', $progress_bar_defaults) ? '1' : '0',
    'progressbar_pagebreak_labels' => in_array('progressbar_pagebreak_labels', $progress_bar_defaults) ? '1' : '0',
    'progressbar_include_confirmation' => in_array('progressbar_include_confirmation', $progress_bar_defaults) ? '1' : '0',
    'progressbar_label_first' => webform_variable_get('webform_progressbar_label_first'),
    'progressbar_label_confirmation' => webform_variable_get('webform_progressbar_label_confirmation'),
    'preview' => 0,
    'preview_next_button_label' => '',
    'preview_prev_button_label' => '',
    'preview_title' => '',
    'preview_message' => '',
    'preview_message_format' => NULL,
    'preview_excluded_components' => array(),
    'status' => '1',
    'record_exists' => FALSE,
    'roles' => array('1', '2'),
    'emails' => array(),
    'components' => array(),
    'conditionals' => array(),
  );
  drupal_alter('webform_node_defaults', $defaults);
  return $defaults;
}

/**
 * Implements hook_node_prepare().
 */
function webform_node_prepare($node) {
  if (variable_get('webform_node_' . $node->type, FALSE) && !isset($node->webform)) {
    $node->webform = webform_node_defaults();
  }
}

/**
 * Implements hook_node_load().
 */
function webform_node_load($nodes, $types) {
  // Quick check to see if we need to do anything at all for these nodes.
  $webform_types = webform_node_types();
  if (count(array_intersect($types, $webform_types)) == 0) {
    return;
  }

  module_load_include('inc', 'webform', 'includes/webform.components');

  // Select all webforms that match these node IDs.
  $result = db_select('webform')
    ->fields('webform')
    ->condition('nid', array_keys($nodes), 'IN')
    ->execute()
    ->fetchAllAssoc('nid', PDO::FETCH_ASSOC);

  foreach ($result as $nid => $webform) {
    // Load the basic information for each node.
    $nodes[$nid]->webform = $webform;
    $nodes[$nid]->webform['record_exists'] = TRUE;

    // Expand the list of excluded preview components.
    $nodes[$nid]->webform['preview_excluded_components'] = array_filter(explode(',', $webform['preview_excluded_components']));
  }

  // Load the components, emails, and defaults for all webform-enabled nodes.
  // @todo: Increase efficiency here by pulling in all information all at once
  // instead of individual queries.
  foreach ($nodes as $nid => $node) {
    if (!in_array($node->type, $webform_types)) {
      continue;
    }

    // If a webform record doesn't exist, just return the defaults.
    if (!isset($nodes[$nid]->webform)) {
      $nodes[$nid]->webform = webform_node_defaults();
      continue;
    }

    $nodes[$nid]->webform['roles'] = db_select('webform_roles')
      ->fields('webform_roles', array('rid'))
      ->condition('nid', $nid)
      ->execute()
      ->fetchCol();
    $nodes[$nid]->webform['emails'] = db_select('webform_emails')
      ->fields('webform_emails')
      ->condition('nid', $nid)
      ->execute()
      ->fetchAllAssoc('eid', PDO::FETCH_ASSOC);

    // Unserialize the mappings and excluded component list for e-mails.
    foreach ($nodes[$nid]->webform['emails'] as $eid => $email) {
      $nodes[$nid]->webform['emails'][$eid]['excluded_components'] = array_filter(explode(',', $email['excluded_components']));
      $nodes[$nid]->webform['emails'][$eid]['extra'] = unserialize($email['extra']);
      if (webform_variable_get('webform_format_override')) {
        $nodes[$nid]->webform['emails'][$eid]['html'] = webform_variable_get('webform_default_format');
      }
    }

    // Load components for each node.
    $nodes[$nid]->webform['components'] = db_select('webform_component')
      ->fields('webform_component')
      ->condition('nid', $nid)
      ->orderBy('weight')
      ->orderBy('name')
      ->execute()
      ->fetchAllAssoc('cid', PDO::FETCH_ASSOC);

    // Do a little cleanup on each component.
    foreach ($nodes[$nid]->webform['components'] as $cid => $component) {
      $nodes[$nid]->webform['components'][$cid]['nid'] = $nid;
      $nodes[$nid]->webform['components'][$cid]['extra'] = unserialize($component['extra']);
      webform_component_defaults($nodes[$nid]->webform['components'][$cid]);
    }

    // Organize the components into a fieldset-based order.
    if (!empty($nodes[$nid]->webform['components'])) {
      $component_tree = array();
      $page_count = 1;
      _webform_components_tree_build($nodes[$nid]->webform['components'], $component_tree, 0, $page_count);
      $nodes[$nid]->webform['components'] = _webform_components_tree_flatten($component_tree['children']);
    }

    // Load all the conditional information, if any.
    $nodes[$nid]->webform['conditionals'] = db_select('webform_conditional')
      ->fields('webform_conditional')
      ->condition('nid', $nid)
      ->orderBy('weight')
      ->execute()
      ->fetchAllAssoc('rgid', PDO::FETCH_ASSOC);
    if ($nodes[$nid]->webform['conditionals']) {
      $rules = db_select('webform_conditional_rules')
        ->fields('webform_conditional_rules')
        ->condition('nid', $nid)
        ->orderBy('rgid')
        ->orderBy('rid')
        ->execute();
      foreach ($rules as $rule) {
        $nodes[$nid]->webform['conditionals'][$rule->rgid]['rules'][$rule->rid] = (array) $rule;
      }
      $actions = db_select('webform_conditional_actions')
        ->fields('webform_conditional_actions')
        ->condition('nid', $nid)
        ->orderBy('rgid')
        ->orderBy('aid')
        ->execute();
      foreach ($actions as $action) {
        $nodes[$nid]->webform['conditionals'][$action->rgid]['actions'][$action->aid] = (array) $action;
      }
    }
  }
}

/**
 * Implements hook_user_role_delete().
 *
 * Removes references to deleted role from existing webforms.
 */
function webform_user_role_delete($role) {
  db_delete('webform_roles')->condition('rid', $role->rid)->execute();
}

/**
 * Implements hook_form_alter().
 */
function webform_form_alter(&$form, $form_state, $form_id) {
  if (isset($form['#node']->type) && $form_id == $form['#node']->type . '_node_form' && variable_get('webform_node_' . $form['#node']->type, FALSE)) {
    $node = $form['#node'];
    // Preserve all Webform options currently set on the node.
    $form['webform'] = array(
      '#type' => 'value',
      '#value' => $node->webform,
    );

    // If a new node, redirect the user to the components form after save.
    if (empty($node->nid) && in_array($node->type, webform_variable_get('webform_node_types_primary'))) {
      $form['actions']['submit']['#submit'][] = 'webform_form_submit';
    }
  }
}

/**
 * Implements hook_form_BASE_FORM_ID_alter().
 */
function webform_form_node_type_form_alter(&$form, $form_state) {
  if (isset($form['type'])) {
    $form['webform'] = array(
      '#title' => t('Webform'),
      '#type' => 'fieldset',
      '#collapsible' => TRUE,
      '#collapsed' => TRUE,
      '#group' => 'additional_settings',
      '#weight' => 10,
      '#attached' => array(
        'js' => array(drupal_get_path('module', 'webform') . '/js/node-type-form.js'),
      ),
    );
    $form['webform']['webform_node'] = array(
      '#type' => 'checkbox',
      '#title' => t('Enable webform functionality'),
      '#description' => t('Allows a form to be attached to content. This will add tabs for "Webform" and "Results" on all content of this type.'),
      '#weight' => 0,
      '#default_value' => variable_get('webform_node_' . $form['#node_type']->type, FALSE),
      '#attributes' => array(
        'data-enabled-description' => t('Enabled'),
        'data-disabled-description' => t('Disabled'),
      ),
    );
  }
}

/**
 * Submit handler for the webform node form.
 *
 * Redirect the user to the components form on new node inserts. Note that this
 * fires after the hook_submit() function above.
 */
function webform_form_submit($form, &$form_state) {
  drupal_set_message(t('The new webform %title has been created. Add new fields to your webform with the form below.', array('%title' => $form_state['values']['title'])));
  $form_state['redirect'] = 'node/' . $form_state['nid'] . '/webform/components';
}

/**
 * Implements hook_node_view().
 */
function webform_node_view($node, $view_mode) {
  global $user;

  if (!variable_get('webform_node_' . $node->type, FALSE)) {
    return;
  }

  // If empty or a new node (during preview) do not display.
  if (empty($node->webform['components']) || empty($node->nid)) {
    return;
  }

  // If the webform is not set to display in this view mode, return early.
  // View mode of 'form' is exempted to allow blocks and views to force display.
  $extra_fields = field_extra_fields_get_display('node', $node->type, $view_mode);
  if ($view_mode != 'form' && empty($extra_fields['webform']['visible'])) {
    return;
  }

  $submission = FALSE;
  $submission_count = 0;
  $page = node_is_page($node);
  $logging_in = FALSE;
  $total_limit_exceeded = FALSE;
  $user_limit_exceeded = FALSE;
  $closed = FALSE;

  // If a teaser, tell the form to load subsequent pages on the node page. A
  // special exception is made for this view mode only.
  if ($view_mode == 'teaser' && !isset($node->webform['action'])) {
    $query = array_diff_key($_GET, array('q' => ''));
    $node->webform['action'] = url('node/' . $node->nid, array('query' => $query));
  }

  // When logging in using a form on the same page as a webform node, suppress
  // output messages so that they don't show up after the user has logged in.
  // See http://drupal.org/node/239343.
  if (isset($_POST['op']) && isset($_POST['name']) && isset($_POST['pass'])) {
    $logging_in = TRUE;
  }

  if ($node->webform['status'] == 0) {
    $closed = TRUE;
    $enabled = FALSE;
    $allowed_roles = array();
  }
  else {
    // $enabled set by reference.
    $allowed_roles = _webform_allowed_roles($node, $enabled);
  }

  // Get a count of previous submissions by this user. Note that the
  // webform_submission_access() function may disable the page cache for
  // anonymous users if they are allowed to edit their own submissions!
  if ($page && webform_submission_access($node, NULL, 'list')) {
    module_load_include('inc', 'webform', 'includes/webform.submissions');
    $submission_count = webform_get_submission_count($node->nid, $user->uid);
  }

  // Check if this page is cached or not.
  $cached = drupal_page_is_cacheable();

  // Check if the user can add another submission based on the individual
  // submission limit.
  // -1: Submissions are never throttled.
  if ($node->webform['submit_limit'] != -1) {
    module_load_include('inc', 'webform', 'includes/webform.submissions');

    // Disable the form if the limit is exceeded and page cache is not active.
    // This prevents one anonymous user from generated a disabled webform page
    // for the cache, which would be shown to other anonymous users who have not
    // exceeded the limit.
    // Cached should be checked first to avoid the expensive limit check on
    // cached requests.
    if (!$cached && ($user_limit_exceeded = webform_submission_user_limit_check($node))) {
      $enabled = FALSE;
    }
  }

  // Check if the user can add another submission if there is a limit on total
  // submissions.
  // -1: Submissions are never throttled.
  if ($node->webform['total_submit_limit'] != -1) {
    module_load_include('inc', 'webform', 'includes/webform.submissions');

    // Disable the form if the limit is exceeded. The cache is irrelevant for
    // the total submission limit; when it is exceeded for one user, it is
    // exceeded for any other user.
    if (($total_limit_exceeded = webform_submission_total_limit_check($node))) {
      $enabled = FALSE;
    }
  }

  // Check if this user has a draft for this webform.
  $resume_draft = FALSE;
  if (($node->webform['allow_draft'] || $node->webform['auto_save']) && $user->uid != 0) {
    // Draft found - display form with draft data for further editing.
    if ($draft_sid = _webform_fetch_draft_sid($node->nid, $user->uid)) {
      module_load_include('inc', 'webform', 'includes/webform.submissions');
      $submission = webform_get_submission($node->nid, $draft_sid);
      $enabled = TRUE;
      $resume_draft = TRUE;
    }
  }

  // Avoid building the same form twice on the same page request (which can
  // happen if the webform is displayed in a panel or block) because this
  // causes multistep forms to build incorrectly the second time.
  $cached_forms = &drupal_static(__FUNCTION__, array());
  if (isset($cached_forms[$node->nid])) {
    $form = $cached_forms[$node->nid];
  }
  // If this is the first time, generate the form array.
  else {
    $form = drupal_get_form('webform_client_form_' . $node->nid, $node, $submission, $resume_draft);
    $cached_forms[$node->nid] = $form;
  }

  // Remove the surrounding <form> tag if this is a preview.
  if (!empty($node->in_preview)) {
    $form['#type'] = 'markup';
  }

  // Print out messages for the webform.
  if (empty($node->in_preview) && !isset($node->webform_block) && !$logging_in) {
    theme('webform_view_messages', array(
      'node' => $node,
      'page' => $page,
      'submission_count' => $submission_count,
      'user_limit_exceeded' => $user_limit_exceeded,
      'total_limit_exceeded' => $total_limit_exceeded,
      'allowed_roles' => $allowed_roles,
      'closed' => $closed,
      'cached' => $cached,
    )
    );
  }

  // Add the output to the node.
  $node->content['webform'] = array(
    '#theme' => 'webform_view',
    '#node' => $node,
    '#page' => $page,
    '#form' => $form,
    '#enabled' => $enabled,
    '#visible' => $extra_fields['webform']['visible'],
    '#weight' => 10,
  );
}

/**
 * Helper. Generates an array of allowed roles.
 *
 * @param object $node
 *   The loaded node object containing a webform.
 * @param bool $user_is_allowed
 *   Reference to boolean to be set to whether the current user is allowed.
 *
 * @return array
 *   Associative array of allowed roles indexed by the role id with a boolean
 *   value indicating if the current user has this role.
 */
function _webform_allowed_roles($node, &$user_is_allowed) {
  global $user;
  if ($node->webform['confidential']) {
    // Confidential webform may only be submitted anonymously, including uid 1.
    $user_is_allowed = user_is_anonymous();
    $allowed_roles = array(DRUPAL_ANONYMOUS_RID => $user_is_allowed);
  }
  elseif (webform_variable_get('webform_submission_access_control')) {
    // Check if the user's role can submit this webform.
    $allowed_roles = array();
    foreach ($node->webform['roles'] as $rid) {
      $allowed_roles[$rid] = isset($user->roles[$rid]);
    }
    $user_is_allowed = $user->uid == 1 || array_search(TRUE, $allowed_roles);
  }
  else {
    // If not using Webform submission access control, allow all roles.
    $user_is_allowed = TRUE;
    $allowed_roles = array_fill_keys(array_keys(user_roles()), TRUE);
  }
  return $allowed_roles;
}

/**
 * Output the Webform into the node content.
 *
 * @param array $variables
 *   The variables array.
 *
 * @return string
 *   The rendered Webform.
 */
function theme_webform_view(array $variables) {
  // Only show the form if this user is allowed access.
  if ($variables['webform']['#enabled']) {
    return drupal_render($variables['webform']['#form']);
  }
}

/**
 * Display a message to a user if they are not allowed to fill out a form.
 *
 * @param array $variables
 *   The variables array.
 */
function theme_webform_view_messages(array $variables) {
  global $user;

  $node = $variables['node'];
  $page = $variables['page'];
  $submission_count = $variables['submission_count'];
  $user_limit_exceeded = $variables['user_limit_exceeded'];
  $total_limit_exceeded = $variables['total_limit_exceeded'];
  $allowed_roles = $variables['allowed_roles'];
  $closed = $variables['closed'];
  $cached = $variables['cached'];

  $type = 'warning';

  if ($closed) {
    $message = t('Submissions for this form are closed.');
  }
  elseif ($node->webform['confidential'] && user_is_logged_in()) {
    $message = t('This form is confidential. You must <a href="!url">Log out</a> to submit it.', array('!url' => url('user/logout', array('query' => drupal_get_destination()))));
  }
  // If open and not allowed to submit the form, give an explanation.
  elseif (array_search(TRUE, $allowed_roles) === FALSE && $user->uid != 1) {
    if (empty($allowed_roles)) {
      // No roles are allowed to submit the form.
      $message = t('Submissions for this form are closed.');
    }
    elseif ($user->uid == 0) {
      // The user is anonymous, so (at least) needs to log in to view the form.
      $login = url('user/login', array('query' => drupal_get_destination()));
      $register = url('user/register', array('query' => drupal_get_destination()));
      if (variable_get('user_register', 1) == 0) {
        $message = t('You must <a href="!login">login</a> to view this form.', array('!login' => $login));
      }
      else {
        $message = t('You must <a href="!login">login</a> or <a href="!register">register</a> to view this form.', array('!login' => $login, '!register' => $register));
      }
    }
    else {
      // The user must be some other role to submit.
      $message = t('You do not have permission to view this form.');
      $type = 'error';
    }
  }

  // If the user has exceeded the limit of submissions, explain the limit.
  elseif ($user_limit_exceeded && !$cached) {
    if ($node->webform['submit_interval'] == -1 && $node->webform['submit_limit'] > 1) {
      $message = t('You have submitted this form the maximum number of times (@count).', array('@count' => $node->webform['submit_limit']));
    }
    elseif ($node->webform['submit_interval'] == -1 && $node->webform['submit_limit'] == 1) {
      $message = t('You have already submitted this form.');
    }
    else {
      $message = t('You may not submit another entry at this time.');
    }
  }
  elseif ($total_limit_exceeded && !$cached) {
    if ($node->webform['total_submit_interval'] == -1 && $node->webform['total_submit_limit'] > 1) {
      $message = t('This form has received the maximum number of entries.');
    }
    else {
      $message = t('You may not submit another entry at this time.');
    }
  }

  // If the user has submitted before, give them a link to their submissions.
  if ($submission_count > 0 && $node->webform['submit_notice'] == 1 && !$cached) {
    if (empty($message)) {
      $message = t('You have already submitted this form.');
      $type = 'status';
    }
    $message .= ' ' . t('<a href="!url">View your previous submissions</a>.', array('!url' => url('node/' . $node->nid . '/submissions')));
  }

  if ($page && isset($message)) {
    drupal_set_message($message, $type, FALSE);
  }
}

/**
 * Implements hook_mail().
 */
function webform_mail($key, &$message, $params) {
  $message['headers'] = array_merge($message['headers'], $params['headers']);
  $message['subject'] = $params['subject'];
  $message['body'][] = $params['message'];
}

/**
 * Implements hook_block_info().
 */
function webform_block_info() {
  $blocks = array();
  $webform_node_types = webform_node_types();
  if (!empty($webform_node_types)) {
    $query = db_select('webform', 'w')->fields('w')->fields('n', array('title'));
    $query->leftJoin('node', 'n', 'w.nid = n.nid');
    $query->condition('w.block', 1);
    $query->condition('n.type', $webform_node_types, 'IN');
    $result = $query->execute();
    foreach ($result as $data) {
      $blocks['client-block-' . $data->nid] = array(
        'info' => t('Webform: !title', array('!title' => $data->title)),
        'cache' => DRUPAL_NO_CACHE,
      );
    }
  }
  return $blocks;
}

/**
 * Implements hook_block_view().
 */
function webform_block_view($delta = '') {
  // Load the block-specific configuration settings.
  $webform_blocks = webform_variable_get('webform_blocks');
  $settings = isset($webform_blocks[$delta]) ? $webform_blocks[$delta] : array();
  $settings += array(
    'display' => 'form',
    'pages_block' => 1,
    'confirmation_block' => 0,
  );

  // Get the node ID from delta.
  $nid = drupal_substr($delta, strrpos($delta, '-') + 1);

  // Load node in current language.
  if (module_exists('translation')) {
    global $language;
    if (($translations = translation_node_get_translations($nid)) && (isset($translations[$language->language]))) {
      $nid = $translations[$language->language]->nid;
    }
  }

  // The webform node to display in the block.
  $node = node_load($nid);

  // Return if user has no access to the webform node.
  if (!node_access('view', $node)) {
    return;
  }

  // This is a webform node block.
  $node->webform_block = TRUE;
  $node->webform['confirmation_block'] = $settings['confirmation_block'];

  // If not displaying pages in the block, set the #action property on the form.
  if ($settings['pages_block']) {
    $node->webform['action'] = FALSE;
  }
  else {
    $query = array_diff_key($_GET, array('q' => ''));
    $node->webform['action'] = url('node/' . $node->nid, array('query' => $query));
  }

  // Generate the content of the block based on display settings.
  $content = array();
  if ($settings['display'] == 'form') {
    webform_node_view($node, 'form');
    if (isset($node->content['webform'])) {
      $content = $node->content['webform'];
      if (!$node->content['webform']['#visible']) {
        // If the webform form is only shown in a block and not as within the
        // node, remove the content from the node.
        unset($node->content['webform']);
      }
    }
  }
  else {
    $content = node_view($node, $settings['display']);
  }

  // Check for an in-block confirmation message.
  if (isset($_SESSION['webform_confirmation'][$nid])) {
    if ($_SESSION['webform_confirmation'][$nid]['confirmation_page']) {
      // Replace form with confirmation page.
      $content = array(
        '#theme' => array('webform_confirmation_' . $node->nid, 'webform_confirmation'),
        '#node' => $node,
        '#sid' => $_SESSION['webform_confirmation'][$nid]['sid'],
      );
    }
    elseif (strlen(trim(strip_tags($node->webform['confirmation'])))) {
      // Display confirmation link drupal status messages, but in the block.
      $message = webform_replace_tokens($node->webform['confirmation'],
                                        $node,
                                        webform_get_submission($nid, $_SESSION['webform_confirmation'][$nid]['confirmation_page']),
                                        NULL,
                                        $node->webform['confirmation_format']);
      $content = array(
        'confirmation_message' => array(
          '#markup' => "<div class=\"messages status webform-confirmation\">\n" .
          '<h2 class="element-invisible">' . t('Status message') . "</h2>\n" .
          $message .
          "</div>\n",
          '#weight' => -1,
        ),
        'webform_view' => $content,
      );
    }
    unset($_SESSION['webform_confirmation'][$nid]);
    if (empty($_SESSION['webform_confirmation'])) {
      unset($_SESSION['webform_confirmation']);
    }
  }

  // Add contextual links for the webform node if they aren't already there.
  if (!isset($content['#contextual_links']['node'])) {
    $content['#contextual_links']['node'] = array('node', array($node->nid));
  }

  // Create the block, using the node title for the block title.
  // Note that we render the content immediately here rather than passing back
  // a renderable so that if the block is empty it is hidden.
  $block = array(
    'subject' => check_plain($node->title),
    'content' => $content,
  );
  return $block;
}

/**
 * Implements hook_block_configure().
 */
function webform_block_configure($delta = '') {
  $nid = str_replace('client-block-', '', $delta);
  $node = node_load($nid);

  // Load the block-specific configuration settings.
  $webform_blocks = webform_variable_get('webform_blocks');
  $settings = isset($webform_blocks[$delta]) ? $webform_blocks[$delta] : array();
  $settings += array(
    'display' => 'form',
    'pages_block' => 1,
    'confirmation_block' => 0,
  );

  // Build a list of view modes for this node.
  $entity_info = entity_get_info('node');
  $view_modes = array(
    'form' => t('Form only'),
  );
  foreach ($entity_info['view modes'] as $view_mode_key => $view_mode_info) {
    $view_modes[$view_mode_key] = $view_mode_info['label'];
  }

  $form = array();
  $form['display'] = array(
    '#type' => 'select',
    '#title' => t('View mode'),
    '#default_value' => $settings['display'],
    '#options' => $view_modes,
    '#description' => t('The view mode determines how much of the webform to show within the block. You may <a href="!view_modes">customize different view modes</a> (other than the "Form only" mode) or even create new custom view modes if either the <a href="http://drupal.org/project/entity_view_mode">Entity view modes</a> or <a href="http://drupal.org/project/ds">Display Suite</a> modules are installed.', array('!view_modes' => url('admin/structure/types/manage/' . $node->type . '/display'))),
  );

  $form['pages_block'] = array(
    '#type' => 'radios',
    '#title' => t('Multi-page handling'),
    '#options' => array(
      1 => t('Display all pages inside block'),
      0 => t('Redirect to the node page after the first page'),
    ),
    '#default_value' => $settings['pages_block'],
    '#description' => t('If your webform has multiple pages, you may change the behavior of the "Next" button. This will also affect where validation messages show up after an error.'),
  );

  $form['confirmation_block'] = array(
    '#type' => 'radios',
    '#title' => t('Confirmation message'),
    '#options' => array(
      0 => t('Display as configured in the webform'),
      1 => t('Display the confirmation page in the block on the same page (no redirect)'),
    ),
    '#default_value' => $settings['confirmation_block'],
    '#description' => t("This setting overrides the webform's configuration and redirection location settings when the webform is submitted via this block."),
  );
  return $form;
}

/**
 * Implements hook_block_save().
 */
function webform_block_save($delta = '', $edit = array()) {
  // Load the previously defined block-specific configuration settings.
  $settings = webform_variable_get('webform_blocks');
  // Build the settings array.
  $new_settings[$delta] = array(
    'display' => $edit['display'],
    'pages_block' => $edit['pages_block'],
    'confirmation_block' => $edit['confirmation_block'],
  );
  // We store settings for multiple blocks in just one variable
  // so we merge the existing settings with the new ones before save.
  variable_set('webform_blocks', array_merge($settings, $new_settings));
}

/**
 * Client form generation function.
 *
 * If this is displaying an existing submission, pass in the $submission
 * variable with the contents of the submission to be displayed.
 *
 * @param $form
 *   The current form array (always empty).
 * @param $form_state
 *   The current form values of a submission, used in multipage webforms.
 * @param object $node
 *   The current webform node.
 * @param $submission
 *   An object containing information about the form submission if we're
 *   displaying a result.
 * @param $resume_draft
 *   Optional. Set to TRUE when resuming a draft and skipping past previously-
 *   validated pages is desired.
 * @param $filter
 *   Whether or not to filter the contents of descriptions and values when
 *   building the form. Values need to be unfiltered to be editable by
 *   Form Builder.
 */
function webform_client_form($form, &$form_state, $node, $submission = FALSE, $resume_draft = FALSE, $filter = TRUE) {
  global $user;

  // Attach necessary JavaScript and CSS.
  $form['#attached'] = array(
    'css' => array(drupal_get_path('module', 'webform') . '/css/webform.css'),
    'js' => array(drupal_get_path('module', 'webform') . '/js/webform.js'),
  );
  form_load_include($form_state, 'inc', 'webform', 'includes/webform.components');
  form_load_include($form_state, 'inc', 'webform', 'includes/webform.submissions');

  // For ajax requests, $form_state['values']['details'] is missing. Restore
  // from storage, if available, for multi-page forms.
  if (empty($form_state['values']['details']) && !empty($form_state['storage']['details'])) {
    $form_state['values']['details'] = $form_state['storage']['details'];
  }

  // If in a multi-step form, a submission ID may be specified in form state.
  // Load this submission. This allows anonymous users to use auto-save.
  if (empty($submission) && !empty($form_state['values']['details']['sid'])) {
    $submission = webform_get_submission($node->nid, $form_state['values']['details']['sid']);
  }

  $finished = isset($submission->is_draft) ? (!$submission->is_draft) : 0;
  $submit_button_text = $finished
                          ? t('Save')
                          : (empty($node->webform['submit_text']) ? t('Submit') : t($node->webform['submit_text']));

  // Bind arguments to $form to make them available in theming and form_alter.
  $form['#node'] = $node;
  $form['#submission'] = $submission;
  $form['#is_draft'] = $submission && $submission->is_draft;
  $form['#filter'] = $filter;

  // Add a theme function for this form.
  $form['#theme'] = array('webform_form_' . $node->nid, 'webform_form');

  // Add a CSS class for all client forms.
  $form['#attributes']['class'][] = 'webform-client-form';
  $form['#attributes']['class'][] = 'webform-client-form-' . $node->nid;

  // Sometimes when displaying a webform as a teaser or block, a custom action
  // property is set to direct the user to the node page.
  if (!empty($node->webform['action'])) {
    $form['#action'] = $node->webform['action'];
  }

  $form['#submit'] = array('webform_client_form_pages', 'webform_client_form_submit');
  $form['#validate'] = array('webform_client_form_validate');
  // Add includes for used component types and pre/post validation handlers.
  $form['#process'] = array('webform_client_form_process');

  if (is_array($node->webform['components']) && !empty($node->webform['components'])) {
    // Prepare a new form array.
    $form['submitted'] = array(
      '#tree' => TRUE,
    );
    $form['details'] = array(
      '#tree' => TRUE,
    );

    // Put the components into a tree structure.
    if (!isset($form_state['storage']['component_tree'])) {
      $form_state['webform']['component_tree'] = array();
      $form_state['webform']['page_count'] = 1;
      $form_state['webform']['page_num'] = 1;
      _webform_components_tree_build($node->webform['components'], $form_state['webform']['component_tree'], 0, $form_state['webform']['page_count']);

      // If preview is enabled, increase the page count by one.
      if ($node->webform['preview']) {
        $form_state['webform']['page_count']++;
      }
      $form_state['webform']['preview'] = $node->webform['preview'];

      // If this is the first time this draft has been restore and presented to
      // the user, let them know that they are looking at a draft, rather than
      // a new form. This applies to the node view page, but not to a submission
      // edit page (where they presummably know what submission they are
      // editing).
      if ($resume_draft && empty($form_state['input'])) {
        drupal_set_message(t('A partially-completed form was found. Please complete the remaining portions.'));
      }
    }
    else {
      $form_state['webform']['component_tree'] = $form_state['storage']['component_tree'];
      $form_state['webform']['page_count'] = $form_state['storage']['page_count'];
      $form_state['webform']['page_num'] = $form_state['storage']['page_num'];
      $form_state['webform']['preview'] = $form_state['storage']['preview'];
    }

    // Set the input values based on whether we're editing an existing
    // submission or not.
    $input_values = isset($submission->data) ? $submission->data : array();

    // Form state storage override any default submission information. Convert
    // the value structure to always be an array, matching $submission->data.
    if (isset($form_state['storage']['submitted'])) {
      foreach ($form_state['storage']['submitted'] as $cid => $data) {
        $input_values[$cid] = is_array($data) ? $data : array($data);
      }
    }

    // Form state values override any default submission information. Convert
    // the value structure to always be an array, matching $submission->data.
    if (isset($form_state['values']['submitted'])) {
      foreach ($form_state['values']['submitted'] as $cid => $data) {
        $input_values[$cid] = is_array($data) ? $data : array($data);
      }
    }

    // Generate conditional topological order & report any errors.
    $sorter = webform_get_conditional_sorter($node);
    $sorter->reportErrors();

    // Excecute the condtionals on the current input values.
    $input_values = $sorter->executeConditionals($input_values);

    // Allow values from other pages to be sent to browser for conditionals.
    $form['#conditional_values'] = $input_values;

    // Allow components access to most up-to-date values.
    $form_state['#conditional_values'] = $input_values;

    // For resuming a previous draft, find the next page after the last
    // validated page.
    if (!isset($form_state['storage']['page_num']) && $submission && $submission->is_draft && $submission->highest_valid_page) {
      // Find the:
      // 1. previous/next non-empty page, or
      // 2. the preview page, or
      // 3. the preview page, forcing its display if the form would unexpectedly
      //    submit, or
      // 4. page 1 even if empty, if no other previous page would be shown.
      $form_state['webform']['page_num'] = $submission->highest_valid_page;
      do {
        $form_state['webform']['page_num']++;
      } while (!webform_get_conditional_sorter($node)->pageVisibility($form_state['webform']['page_num']));
      if (!$form_state['webform']['preview'] && $form_state['webform']['page_num'] == $form_state['webform']['page_count'] + (int) !$form_state['webform']['preview']) {
        // Force a preview to avert an unintended submission via Next.
        $form_state['webform']['preview'] = TRUE;
        $form_state['webform']['page_count']++;
      }
      // The form hasn't been submitted (ever) and the preview code will expect
      // $form_state['values']['submitted'] to be set from a previous
      // submission, so provide these values here.
      $form_state['values']['submitted'] = $input_values;
      $form_state['storage']['submitted'] = $input_values;
    }

    // Shorten up our variable names.
    $component_tree = $form_state['webform']['component_tree'];
    $page_count = $form_state['webform']['page_count'];
    $page_num = $form_state['webform']['page_num'];
    $preview = $form_state['webform']['preview'];

    if ($node->webform['progressbar_include_confirmation'] || $page_count > 1) {
      $page_labels = webform_page_labels($node, $form_state);
      $form['progressbar'] = array(
        '#theme' => 'webform_progressbar',
        '#node' => $node,
        '#page_num' => $page_num,
        '#page_count' => count($page_labels),
        '#page_labels' => $page_labels,
        '#weight' => -100,
      );
    }

    // Check whether a previous submission was truncated. The length of the
    // client form is not estimated before submission because a) the
    // determination may not be accurate for some webform components and b) the
    // error will be apparent upon submission.
    webform_input_vars_check($form, $form_state, 'submitted');

    // Recursively add components to the form. The unfiltered version of the
    // form (typically used in Form Builder), includes all components.
    foreach ($component_tree['children'] as $cid => $component) {
      if ($component['type'] == 'pagebreak') {
        $next_page_labels[$component['page_num'] - 1] = !empty($component['extra']['next_page_label']) ? t($component['extra']['next_page_label']) : t('Next Page >');
        $prev_page_labels[$component['page_num']] = !empty($component['extra']['prev_page_label']) ? t($component['extra']['prev_page_label']) : t('< Previous Page');
      }
      if (!$filter || $sorter->componentVisibility($cid, $page_num)) {
        $component_value = isset($input_values[$cid]) ? $input_values[$cid] : NULL;
        _webform_client_form_add_component($node, $component, $component_value, $form['submitted'], $form, $input_values, 'form', $page_num, $filter);
      }
    }
    if ($preview) {
      $next_page_labels[$page_count - 1] = $node->webform['preview_next_button_label'] ? t($node->webform['preview_next_button_label']) : t('Preview');
      $prev_page_labels[$page_count] = $node->webform['preview_prev_button_label'] ? t($node->webform['preview_prev_button_label']) : t('< Previous');
    }

    // Add the preview if needed.
    if ($preview && $page_num === $page_count) {
      $preview_submission = webform_submission_create($node, $user, $form_state, TRUE, $submission);
      $preview_message = $node->webform['preview_message'];
      if (strlen(trim(strip_tags($preview_message))) === 0) {
        $preview_message = t('Please review your submission. Your submission is not complete until you press the "!button" button!', array('!button' => $submit_button_text));
      }
      $form['preview_message'] = array(
        '#type' => 'markup',
        '#markup' => webform_replace_tokens($preview_message, $node, $preview_submission, NULL, $node->webform['preview_message_format']),
      );

      $form['preview'] = webform_submission_render($node, $preview_submission, NULL, 'html', $node->webform['preview_excluded_components']);
      $form['#attributes']['class'][] = 'preview';
    }

    // These form details help managing data upon submission.
    $form['details']['nid'] = array(
      '#type' => 'value',
      '#value' => $node->nid,
    );
    $form['details']['sid'] = array(
      '#type' => 'hidden',
      '#value' => isset($submission->sid) ? $submission->sid : NULL,
    );
    $form['details']['uid'] = array(
      '#type' => 'value',
      '#value' => isset($submission->uid) ? $submission->uid : $user->uid,
    );
    $form['details']['page_num'] = array(
      '#type' => 'hidden',
      '#value' => $page_num,
    );
    $form['details']['page_count'] = array(
      '#type' => 'hidden',
      '#value' => $page_count,
    );
    $form['details']['finished'] = array(
      '#type' => 'hidden',
      '#value' => $finished,
    );

    // Add process functions to remove the IDs forced upon buttons and wrappers.
    $actions_pre_render = array_merge(element_info_property('actions', '#pre_render', array()), array('webform_pre_render_remove_id'));
    $buttons_pre_render = array_merge(element_info_property('submit', '#pre_render', array()), array('webform_pre_render_remove_id'));

    // Add buttons for pages, drafts, and submissions.
    $form['actions'] = array(
      '#type' => 'actions',
      '#weight' => 1000,
      '#pre_render' => $actions_pre_render,
    );

    // Add the draft button.
    if ($node->webform['allow_draft'] && (empty($submission) || $submission->is_draft) && $user->uid != 0) {
      $form['actions']['draft'] = array(
        '#type' => 'submit',
        '#value' => t('Save Draft'),
        '#weight' => -2,
        // Prevalidation only; no element validation for Save Draft.
        '#validate' => array('webform_client_form_prevalidate'),
        '#attributes' => array(
          'formnovalidate' => 'formnovalidate',
          'class' => array('webform-draft'),
        ),
        '#pre_render' => $buttons_pre_render,
      );
    }

    // Add the submit button(s).
    if ($page_num > 1) {
      $form['actions']['previous'] = array(
        '#type' => 'submit',
        '#value' => $prev_page_labels[$page_num],
        '#weight' => 5,
        '#validate' => array(),
        '#attributes' => array(
          'formnovalidate' => 'formnovalidate',
          'class' => array('webform-previous'),
        ),
        '#pre_render' => $buttons_pre_render,
      );
    }
    if ($page_num == $page_count) {
      $form['actions']['submit'] = array(
        '#type' => 'submit',
        '#value' => $submit_button_text,
        '#weight' => 10,
        '#attributes' => array(
          'class' => array('webform-submit', 'button-primary'),
        ),
        '#pre_render' => $buttons_pre_render,
      );
    }
    elseif ($page_num < $page_count) {
      $form['actions']['next'] = array(
        '#type' => 'submit',
        '#value' => $next_page_labels[$page_num],
        '#weight' => 10,
        '#attributes' => array(
          'class' => array('webform-next', 'button-primary'),
        ),
        '#pre_render' => $buttons_pre_render,
      );
    }
  }

  return $form;
}

/**
 * Process function for webform_client_form().
 *
 * Include all the enabled components for this form to ensure availability.
 * Also adds the pre- and post-validators to ensure that hook_form_alters don't
 * add their validation functions in the wrong order.
 */
function webform_client_form_process($form, $form_state) {
  $components = webform_components();
  foreach ($components as $component_type => $component) {
    webform_component_include($component_type);
  }

  // Add the post validation to end of validators. Do this first on the off
  // chance that an _alter function has unset form['#validate'].
  $form['#validate'][] = 'webform_client_form_postvalidate';
  // Add the pre-validator to the front of the list to run first.
  array_unshift($form['#validate'], 'webform_client_form_prevalidate');

  return $form;
}

/**
 * Add a component to a renderable array. Called recursively for fieldsets.
 *
 * This function assists in the building of the client form, as well as the
 * display of results, and the text of e-mails.
 *
 * @param object $node
 *   The current webform node.
 * @param $component
 *   The component to be added to the form.
 * @param $component_value
 *   The components current value if known.
 * @param $parent_fieldset
 *   The fieldset to which this element will be added.
 * @param $form
 *   The entire form array.
 * @param $input_values
 *   All the values for this form, keyed by the component IDs. This may be
 *   pulled from $form_state['values']['submitted'] or $submission->data.
 *   These values are used to check if the component should be displayed
 *   conditionally.
 * @param $format
 *   The format the form should be displayed as. May be one of the following:
 *   - form: Show as an editable form.
 *   - html: Show as HTML results.
 *   - text: Show as plain text.
 * @param $page_num
 *   The page number. Defaults to 0.
 * @param $filter
 *   Whether the form element properties should be filtered. Only set to FALSE
 *   if needing the raw properties for editing.
 *
 * @see webform_client_form()
 * @see webform_submission_render()
 */
function _webform_client_form_add_component($node, $component, $component_value, &$parent_fieldset, &$form, $input_values, $format = 'form', $page_num = 0, $filter = TRUE) {
  $cid = $component['cid'];
  $component_access = empty($component['extra']['private']) || webform_results_access($node);

  // Load with submission information if necessary.
  if ($format != 'form') {
    // This component is display only.
    $data = empty($input_values[$cid]) ? NULL : $input_values[$cid];
    if ($display_element = webform_component_invoke($component['type'], 'display', $component, $data, $format, $form['#submission'])) {
      // Set access based on the private property.
      $display_element += array('#access' => TRUE);
      $display_element['#access'] = $display_element['#access'] && $component_access;

      // Ensure the component is added as a property.
      $display_element['#webform_component'] = $component;

      // Add custom CSS classes to the field and wrapper.
      _webform_component_classes($display_element, $component);

      // Allow modules to modify a "display only" webform component.
      drupal_alter('webform_component_display', $display_element, $component);

      // The form_builder() function usually adds #parents and #id for us, but
      // because these are not marked for #input, we need to add them manually.
      if (!isset($display_element['#parents'])) {
        $parents = isset($parent_fieldset['#parents']) ? $parent_fieldset['#parents'] : array('submitted');
        $parents[] = $component['form_key'];
        $display_element['#parents'] = $parents;
      }
      if (!isset($display_element['#id'])) {
        $display_element['#id'] = drupal_clean_css_identifier('edit-' . implode('-', $display_element['#parents']));
      }

      // Add the element into the proper parent in the display.
      $parent_fieldset[$component['form_key']] = $display_element;
    }
  }
  // Show the component only on its form page, or if building an unfiltered
  // version of the form (such as for Form Builder).
  elseif ($component['page_num'] == $page_num || $filter == FALSE) {
    // Add this user-defined field to the form (with all the values that are
    // always available).
    if ($element = webform_component_invoke($component['type'], 'render', $component, $component_value, $filter, $form['#submission'])) {
      // Set access based on the private property.
      $element += array('#access' => TRUE);
      $element['#access'] = $element['#access'] && $component_access;

      // Ensure the component is added as a property.
      $element['#webform_component'] = $component;

      // The 'private' option is in most components, but it's not a real
      // property. Add it for Form Builder compatibility.
      if (webform_component_feature($component['type'], 'private')) {
        $element['#webform_private'] = $component['extra']['private'];
      }

      // The 'placeholder' option is in some components, but it's not a real
      // property. Add it for Form Builder compatibility.
      if (webform_component_feature($component['type'], 'placeholder')) {
        $element['#webform_placeholder'] = $component['extra']['placeholder'];
      }

      // Add custom CSS classes to the field and wrapper.
      _webform_component_classes($element, $component);

      // Allow modules to modify a webform component that is going to be render
      // in a form.
      drupal_alter('webform_component_render', $element, $component);

      // Add the element into the proper parent in the form.
      $parent_fieldset[$component['form_key']] = $element;
    }
    else {
      drupal_set_message(t('The webform component @type is not able to be displayed', array('@type' => $component['type'])));
    }
  }

  // Disable validation initially on all elements. We manually validate
  // all webform elements in webform_client_form_validate().
  if (isset($parent_fieldset[$component['form_key']])) {
    $parent_fieldset[$component['form_key']]['#validated'] = TRUE;
    $parent_fieldset[$component['form_key']]['#webform_validated'] = FALSE;
  }

  if (isset($component['children']) && is_array($component['children'])) {
    $sorter = webform_get_conditional_sorter($node);
    foreach ($component['children'] as $scid => $subcomponent) {
      $subcomponent_value = isset($input_values[$scid]) ? $input_values[$scid] : NULL;
      // Include if always shown, or for forms, also if currently hidden but
      // might be shown due to conditionals.
      $visibility = $sorter->componentVisibility($scid, $subcomponent['page_num']);
      if ($visibility == WebformConditionals::componentShown || ($format == 'form' && $visibility) || !$filter) {
        _webform_client_form_add_component($node, $subcomponent, $subcomponent_value, $parent_fieldset[$component['form_key']], $form, $input_values, $format, $page_num, $filter);
      }
    }
  }
}

/**
 * Validates that the form can still be submitted, saved as draft, or edited.
 *
 * Because forms may be submitted from cache or the webform changed while the
 * submission is in progress, the conditions to allow the form are re-checked
 * upon form submission.
 */
function webform_client_form_prevalidate($form, &$form_state) {
  // Refresh the node in case it changed since the form was build and retrieved
  // from cache.
  $node = $form['#node'] = node_load($form['#node']->nid);
  $finished = $form_state['values']['details']['finished'];

  // Check if the user is allowed to submit based on role. This check is
  // repeated here to ensure the user is still logged in at the time of
  // submission, otherwise a stale form in another window may be allowed.
  // $allowed_role set by reference.
  $allowed_roles = _webform_allowed_roles($node, $allowed_role);

  // Check that the submissions have not exceeded the total submission limit.
  $total_limit_exceeded = FALSE;
  if ($node->webform['total_submit_limit'] != -1 && !$finished) {
    $total_limit_exceeded = webform_submission_total_limit_check($node);
  }

  // Check that the user has not exceeded the submission limit.
  // This usually will only apply to anonymous users when the page cache is
  // enabled, because they may submit the form even if they do not have access.
  $user_limit_exceeded = FALSE;
  if ($node->webform['submit_limit'] != -1 && !$finished) {
    $user_limit_exceeded = webform_submission_user_limit_check($node);
  }

  // Check that the form is still open at time of submission.
  // See https://www.drupal.org/node/2317273
  // Consider the webform closed when it's status is closed AND either there
  // is no submission yet (hence isn't being edited) or the user isn't an admin.
  // Another way to consider this is that the form is open when its status is
  // open OR there is a submission and the user is an admin.
  $closed = empty($node->webform['status']) && (
    empty($form['#submission']) ||
    !user_access('edit all webform submissions')
  );

  // Prevent submission by throwing an error.
  if ((!$allowed_role || $total_limit_exceeded || $user_limit_exceeded || $closed)) {
    theme('webform_view_messages', array('node' => $node, 'page' => 1, 'submission_count' => 0, 'user_limit_exceeded' => $user_limit_exceeded, 'total_limit_exceeded' => $total_limit_exceeded, 'allowed_roles' => $allowed_roles, 'closed' => $closed, 'cached' => FALSE));
    form_set_error('', NULL);
  }
}

/**
 * Form API #validate handler for the webform_client_form() form.
 */
function webform_client_form_validate($form, &$form_state) {
  if (($errors = form_get_errors()) && array_key_exists('', $errors)) {
    // Prevalidation failed. The form cannot be submitted. Do not attemp futher
    // validation.
    return;
  }
  if ($form_state['webform']['preview'] && $form_state['webform']['page_count'] === $form_state['webform']['page_num']) {
    // Form has already passed validation and is on the preview page.
    return;
  }

  module_load_include('inc', 'webform', 'includes/webform.submissions');
  $node = $form['#node'];

  // Assemble an array of all past and new input values that will determine if
  // certain elements need validation at all.
  if (!empty($node->webform['conditionals'])) {
    $input_values = isset($form_state['storage']['submitted']) ? $form_state['storage']['submitted'] : array();
    $new_values = isset($form_state['values']['submitted']) ? _webform_client_form_submit_flatten($form['#node'], $form_state['values']['submitted']) : array();
    foreach ($new_values as $cid => $values) {
      $input_values[$cid] = $values;
    }
    // Ensure that all conditionally-hidden values are removed.
    $input_values = webform_get_conditional_sorter($node)->executeConditionals($input_values, $form_state['webform']['page_num']);
  }
  else {
    $input_values = NULL;
  }

  // Run all #element_validate and #required checks. These are skipped initially
  // by setting #validated = TRUE on all components when they are added.
  _webform_client_form_validate($form, $form_state, 'webform_client_form', $input_values);
}

/**
 * Recursive validation function to trigger normal Drupal validation.
 *
 * This function imitates _form_validate in Drupal's form.inc, only it sets
 * a different property to ensure that validation has occurred.
 */
function _webform_client_form_validate(&$elements, &$form_state, $form_id = NULL, $input_values = NULL) {
  if (isset($input_values) && isset($elements['#webform_component'])) {
    $sorter = webform_get_conditional_sorter($form_state['complete form']['#node']);
    $cid = $elements['#webform_component']['cid'];
    $page_num = $form_state['values']['details']['page_num'];
    // Webform-specific enhancements:
    // 1. Only validate the field if it was used in this submission.
    //    This both skips validation on the field and sets the value of the
    //    field to NULL, preventing any dangerous input. Short-circuit
    //    validation for a hidden component (hidden by rules dependent upon
    //    component on previous pages), or a component this is dependent upon
    //    values on the current page, but is hidden based upon their current
    //    values.
    // 2. Only validate if the field has not been set by conditionals.
    //    The user will be unable to fix the validation without surmising the
    //    logic and changing the trigger for the conditional. Also, it isn't
    //    possible to set $element['#value'] without component-specific
    //    knowledge of how the data is stored because $input_values is already
    //    webform-normalized to contain values in arrays.
    if ($sorter->componentVisibility($cid, $page_num) != WebformConditionals::componentShown) {
      form_set_value($elements, NULL, $form_state);
      return;
    }
    if ($sorter->componentSet($cid, $page_num)) {
      $component = $elements['#webform_component'];
      $value = $input_values[$cid];
      $value = is_array($value) ? $value[0] : $value;
      // webform_component_invoke cannot be called with reference arguments.
      // Call directly.
      // webform_component_invoke($component['type'], 'action_set', $component,
      // $elements, $form_state, $value);.
      $function = '_webform_action_set_' . $component['type'];
      $function($component, $elements, $form_state, $value);
    }

    // Check for changes in required status made by conditionals.
    $required = $sorter->componentRequired($cid, $page_num);
    if (isset($required)) {
      $elements['#required'] = $required;

      // Some components, for example, grids, have nested sub-elements. Extend
      // required to any sub-components.
      foreach (element_children($elements) as $key) {
        if (isset($elements[$key]) && $elements[$key] && !isset($elements[$key]['#webform_component'])) {
          // Child is *not* a component.
          $elements[$key]['#required'] = $required;
        }
      }
    }
  }

  // Recurse through all children.
  foreach (element_children($elements) as $key) {
    if (isset($elements[$key]) && $elements[$key]) {
      _webform_client_form_validate($elements[$key], $form_state, NULL, $input_values);
    }
  }
  // Validate the current input.
  if (isset($elements['#webform_validated']) && !$elements['#webform_validated']) {
    if (isset($elements['#needs_validation'])) {
      // Make sure a value is passed when the field is required.
      // A simple call to empty() will not cut it here as some fields, like
      // checkboxes, can return a valid value of 0. Instead, check the
      // length if it's a string, and if it's an array whether it is empty. For
      // radios, FALSE means that no value was submitted, so check that too.
      $value_is_empty_string = is_string($elements['#value']) && strlen(trim($elements['#value'])) === 0;
      $value_is_empty_array = is_array($elements['#value']) && !$elements['#value'];
      if ($elements['#required'] && ($value_is_empty_string || $value_is_empty_array || $elements['#value'] === FALSE || $elements['#value'] === NULL)) {
        form_error($elements, t('!name field is required.', array('!name' => $elements['#title'])));
      }

      // Verify that the value is not longer than #maxlength.
      if (isset($elements['#maxlength']) && drupal_strlen($elements['#value']) > $elements['#maxlength']) {
        form_error($elements, t('!name cannot be longer than %max characters but is currently %length characters long.', array('!name' => empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title'], '%max' => $elements['#maxlength'], '%length' => drupal_strlen($elements['#value']))));
      }

      // Verify that the value is not shorter than #minlength. The value may
      // still be empty (required is a separate validation option).
      if (isset($elements['#minlength'])) {
        $length = drupal_strlen($elements['#value']);
        if ($length > 0 && $length < $elements['#minlength']) {
          form_error($elements, t('!name cannot be shorter than %min characters but is currently %length characters long.', array('!name' => empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title'], '%min' => $elements['#minlength'], '%length' => drupal_strlen($elements['#value']))));
        }
      }

      if (isset($elements['#options']) && isset($elements['#value'])) {
        if ($elements['#type'] == 'select') {
          $options = form_options_flatten($elements['#options']);
        }
        else {
          $options = $elements['#options'];
        }
        if (is_array($elements['#value'])) {
          $value = $elements['#type'] == 'checkboxes' ? array_keys(array_filter($elements['#value'])) : $elements['#value'];
          foreach ($value as $v) {
            if (!isset($options[$v])) {
              form_error($elements, t('An illegal choice has been detected. Please contact the site administrator.'));
              watchdog('form', 'Illegal choice %choice in !name element.', array('%choice' => $v, '!name' => empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title']), WATCHDOG_ERROR);
            }
          }
        }
        elseif ($elements['#value'] !== '' && !isset($options[$elements['#value']])) {
          form_error($elements, t('An illegal choice has been detected. Please contact the site administrator.'));
          watchdog('form', 'Illegal choice %choice in %name element.', array('%choice' => $elements['#value'], '%name' => empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title']), WATCHDOG_ERROR);
        }
      }
    }

    // Call user-defined form level validators.
    if (isset($form_id)) {
      form_execute_handlers('validate', $elements, $form_state);
    }
    // Call any element-specific validators. These must act on the element
    // #value data.
    elseif (isset($elements['#element_validate'])) {
      foreach ($elements['#element_validate'] as $function) {
        if (is_callable($function)) {
          $function($elements, $form_state, $form_state['complete form']);
        }
      }
    }
    $elements['#webform_validated'] = TRUE;
  }
}

/**
 * Saves submissions that fail validation as drafts.
 *
 * When a user attempts to submit an unfinished form and auto-save is allowed,
 * automatically save the form as a draft to allow the user to complete the
 * form later. This prevents the common failure of a user trying to submit a
 * form and not noticing validation errors. The user then leaves the page
 * without realizing that the form hasn't been submitted.
 *
 * THEORY OF OPERATION:
 * The Drupal 7 Form API lacks an easy way to rebuild the form in the event of
 * validation errors. The operations is thus:
 *
 * 1) The form is first displayed. If it is an existing draft,
 *    webform_client_form will generated a form to edit the draft submission.
 *    Otherwise it creates a form for a new, empty submission. As usual.
 * 2) The submit button is pressed. The form is retrieved from cache or is
 *    recreated by webform_client_form. The values from the $_POST are merged in
 *    and the validation routines are called. As usual.
 * 3) The postvalidation routine, below, detects that validation errors should
 *    be autosaved and calls the submit handlers on a copy of the form and
 *    form_state. This creates the submission, or saves to the existing
 *    submission. The original form and form_state are not modified (yet).
 * 4) If a new submission was created, the form and form_state are updated with
 *    the newly-created sid of the submission, which is returned to the
 *    browser in the hidden field [details][sid]. The form is set to not be
 *    cached, and any existing cached copy is cleared to force step 5. The form
 *    is presented with validation errors as usual.
 * 5) When the form is submitted again, the form must be rebuilt because it is
 *    not in the cache. The existing draft detection in _webform_fetch_draft_sid
 *    detects that a webform draft is being submitted, and uses its sid in
 *    preference to any other stored draft sid in the database. In the event
 *    that multiple drafts are being implemented by another module, this ensures
 *    that the correct draft is edited.
 * 6) Repeat from step 2 until the form is abandoned (leaving the draft) or
 *    successfully submitted.
 */
function webform_client_form_postvalidate(&$form, &$form_state) {
  $errors = form_get_errors();
  $nid = $form_state['values']['details']['nid'];
  $node = node_load($nid);
  if (user_is_logged_in() &&
      $errors && !array_key_exists('', $errors) &&
      $node->webform['auto_save'] &&
      !$form_state['values']['details']['finished'] &&
      !empty($form_state['values']['op'])) {
    // Validation errors are present, prevalidation succeeded (for example
    // submission limits are ok), auto-save is enabled, this form isn't finished
    // (this is, is or soon will be a draft) and a button was pushed (not ajax).
    //
    // Process submission on a copy of the form and form_state to prevent the
    // submission handlers from making unintended changes. Use a button that
    // isn't Save Draft, Next Page, Submit, etc to avoid triggering any
    // unwanted side effects.
    $submit_form = $form;
    $submit_form_state = $form_state;
    $submit_form_state['values']['op'] = '__AUTOSAVE__';
    form_execute_handlers('submit', $submit_form, $submit_form_state);
    $sid = $submit_form_state['values']['details']['sid'];
    if ($sid != $form_state['values']['details']['sid']) {
      // A new submission was created. Update the form and form_state as if it
      // has been submitted with the new sid. This causes the Form API to
      // render the form with new sid.
      $form_state['values']['details']['sid'] = $sid;
      $form_state['input']['details']['sid'] = $sid;
      $form['details']['sid']['#value'] = $sid;

      // Prevent the form from being cached, forcing it to be rebuilt from the
      // form definition function, which will honor the new sid.
      $form_state['no_cache'] = TRUE;
      if (!empty($form_state['values']['form_build_id'])) {
        cache_clear_all('form_' . $form_state['values']['form_build_id'], 'cache_form');
        cache_clear_all('form_state_' . $form_state['values']['form_build_id'], 'cache_form');
      }
    }
  }
}

/**
 * Handle the processing of pages and conditional logic.
 */
function webform_client_form_pages($form, &$form_state) {
  $node = node_load($form_state['values']['details']['nid']);

  // Multistep forms may not have any components on the first page.
  if (!isset($form_state['values']['submitted'])) {
    $form_state['values']['submitted'] = array();
  }

  // Move special settings to storage.
  if (isset($form_state['webform']['component_tree'])) {
    $form_state['storage']['component_tree'] = $form_state['webform']['component_tree'];
    $form_state['storage']['page_count'] = $form_state['webform']['page_count'];
    $form_state['storage']['page_num'] = $form_state['webform']['page_num'];
    $form_state['storage']['preview'] = $form_state['webform']['preview'];
  }

  // Flatten trees within the submission.
  $form_state['values']['submitted'] = _webform_client_form_submit_flatten($node, $form_state['values']['submitted']);

  // Perform post processing by components.
  _webform_client_form_submit_process($node, $form_state['values']['submitted']);

  // Assume the form is completed unless the page logic says otherwise.
  $form_state['webform_completed'] = TRUE;

  // Merge any stored submission data for multistep forms.
  $original_values = is_array($form_state['values']['submitted']) ? $form_state['values']['submitted'] : array();
  if (isset($form_state['storage']['submitted'])) {
    // Array + operator keeps all elements of left operand and discards any
    // duplicate elements in right operand.
    $original_values += $form_state['storage']['submitted'];
  }

  // Execute conditionals on submission values.
  $form_state['values']['submitted'] = webform_get_conditional_sorter($node)->executeConditionals($original_values);

  // Check for a multi-page form that is not yet complete.
  $submit_op = !empty($form['actions']['submit']['#value']) ? $form['actions']['submit']['#value'] : t('Submit');
  $draft_op = !empty($form['actions']['draft']['#value']) ? $form['actions']['draft']['#value'] : t('Save Draft');
  if (!in_array($form_state['values']['op'], array($submit_op, $draft_op, '__AUTOSAVE__'))) {

    // Store values from the current page in the form state storage.
    $form_state['storage']['submitted'] = $form_state['values']['submitted'];

    // Set the page number.
    if (!isset($form_state['storage']['page_num'])) {
      $form_state['storage']['page_num'] = 1;
    }
    if (end($form_state['clicked_button']['#parents']) == 'next') {
      $forward = 1;
    }
    elseif (end($form_state['clicked_button']['#parents']) == 'previous') {
      $forward = -1;
    }
    $current_page = $form_state['storage']['page_num'];

    if (isset($forward)) {
      // Find the:
      // 1. previous/next non-empty page, or
      // 2. the preview page, or
      // 3. the preview page, forcing its display if the form would unexpectedly
      //    submit, or
      // 4. page 1 even if empty, if no other previous page would be shown.
      $preview_page_num = $form_state['storage']['page_count'] + (int) !$form_state['webform']['preview'];
      $page_num = $current_page;
      do {
        $page_num += $forward;
      } while (!webform_get_conditional_sorter($node)->pageVisibility($page_num));
      if (!$form_state['webform']['preview'] && $page_num == $preview_page_num) {
        // Force a preview to avert an unintended submission via Next.
        $form_state['webform']['preview'] = TRUE;
        $form_state['storage']['preview'] = TRUE;
        $form_state['storage']['page_count']++;
      }
      $form_state['storage']['page_num'] = $page_num;
    }

    // The form is done if the page number is greater than the page count.
    $form_state['webform_completed'] = $form_state['storage']['page_num'] > $form_state['storage']['page_count'];
  }

  // Inform the submit handlers that a draft will be saved.
  $form_state['save_draft'] = in_array($form_state['values']['op'], array($draft_op, '__AUTOSAVE__')) || ($node->webform['auto_save'] && !$form_state['values']['details']['finished'] && !$form_state['webform_completed'] && user_is_logged_in());

  // Determine what we need to do on the next page.
  if (!empty($form_state['save_draft']) || !$form_state['webform_completed']) {
    // Rebuild the form and display the current (on drafts) or next page.
    $form_state['rebuild'] = TRUE;
  }
  else {
    // Remove the form state storage now that we're done with the pages.
    $form_state['rebuild'] = FALSE;
    unset($form_state['storage']);
  }
}

/**
 * Submit handler for saving the form values and sending e-mails.
 */
function webform_client_form_submit($form, &$form_state) {
  module_load_include('inc', 'webform', 'includes/webform.submissions');
  module_load_include('inc', 'webform', 'includes/webform.components');
  global $user;

  if (empty($form_state['save_draft']) && empty($form_state['webform_completed'])) {
    return;
  }

  $node = $form['#node'];
  $sid = $form_state['values']['details']['sid'] ? (int) $form_state['values']['details']['sid'] : NULL;

  // Check if user is submitting as a draft.
  $is_draft = (int) !empty($form_state['save_draft']);

  // To maintain time and user information, load the existing submission.
  // If a draft is deleted while a user is working on completing it, $sid will
  // exist, but webform_get_submission() will not find the draft. So, make a new
  // submission.
  if ($sid && $submission = webform_get_submission($node->webform['nid'], $sid)) {
    // Store original data on object for use in update hook.
    $submission->original = clone $submission;

    // Merge with new submission data. The + operator maintains numeric keys.
    // This maintains existing data with just-submitted data when a user resumes
    // a submission previously saved as a draft. Remove any existing data on
    // this and previous pages. If components are hidden, they may be in the
    // $submission->data but absent entirely from $new_data.
    $page_map = webform_get_conditional_sorter($node)->getPageMap();
    for ($page_nr = 1; $page_nr <= $form_state['webform']['page_num']; $page_nr++) {
      $submission->data = array_diff_key($submission->data, $page_map[$page_nr]);
    }
    $submission->data = webform_submission_data($node, $form_state['values']['submitted']) + $submission->data;
  }
  else {
    // Create a new submission object.
    $submission = webform_submission_create($node, $user, $form_state);
    // Since this is a new submission, a new sid is needed.
    $sid = NULL;
  }

  // Save draft state, and for drafts, save the current page (if clicking next)
  // or the previous page (if not) as the last valid page.
  $submission->is_draft = $is_draft;
  $submission->highest_valid_page = 0;
  if ($is_draft) {
    $submission->highest_valid_page = end($form_state['clicked_button']['#parents']) == 'next' && $form_state['values']['op'] != '__AUTOSAVE__'
      ? $form_state['webform']['page_num']
      : $form_state['webform']['page_num'] - 1;
  }

  // If there is no data to be saved (such as on a multipage form with no fields
  // on the first page), process no further. Submissions with no data cannot
  // be loaded from the database as efficiently, so we don't save them at all.
  if (empty($submission->data)) {
    return;
  }

  // Save the submission to the database.
  if (!$sid) {
    // No sid was found thus insert it in the dataabase.
    $form_state['values']['details']['sid'] = $sid = webform_submission_insert($node, $submission);
    $form_state['values']['details']['is_new'] = TRUE;

    // Save the new details in storage. When ajax calls for file upload/remove,
    // $form_state['values']['details'] is missing. This allows the proper
    // submission to be retrieved in webform_client_form. See #2562703.
    $form_state['storage']['details'] = $form_state['values']['details'];

    // Set a cookie including the server's submission time. The cookie expires
    // in the length of the interval plus a day to compensate for timezones.
    $tracking_mode = webform_variable_get('webform_tracking_mode');
    if ($tracking_mode === 'cookie' || $tracking_mode === 'strict') {
      $cookie_name = 'webform-' . $node->nid;
      $time = REQUEST_TIME;
      $params = session_get_cookie_params();
      setcookie($cookie_name . '[' . $time . ']', $time, $time + $node->webform['submit_interval'] + 86400, $params['path'], $params['domain'], $params['secure'], $params['httponly']);
    }

    // Save session information about this submission for anonymous users,
    // allowing them to access or edit their submissions.
    if (!$user->uid && user_access('access own webform submissions')) {
      $_SESSION['webform_submission'][$sid] = $node->nid;
    }
  }
  else {
    // Sid was found thus update the existing sid in the database.
    webform_submission_update($node, $submission);
    $form_state['values']['details']['is_new'] = FALSE;
  }

  // Check if this form is sending an email.
  if (!$is_draft && !$form_state['values']['details']['finished']) {
    drupal_static_reset('webform_get_submission');
    $submission = webform_get_submission($node->webform['nid'], $sid);
    webform_submission_send_mail($node, $submission);
  }

  // Strip out empty tags added by WYSIWYG editors if needed.
  $message = strlen(trim(strip_tags($node->webform['confirmation']))) > 0;

  // Check confirmation and redirect_url fields.
  $redirect = NULL;
  $redirect_url = trim($node->webform['redirect_url']);
  if (isset($form['actions']['draft']['#value']) && $form_state['values']['op'] == $form['actions']['draft']['#value']) {
    $message = t('Submission saved. You may return to this form later and it will restore the current values.');
  }
  elseif ($is_draft) {
    // No redirect needed. No confirmation message needed.
    $message = FALSE;
  }
  elseif (!empty($form_state['values']['details']['finished'])) {
    $message = t('Submission updated.');
    $redirect = "node/{$node->nid}/submission/$sid";
  }
  elseif (!empty($node->webform['confirmation_block'])) {
    $message = FALSE;
    // Webform was submitted in a block and the confirmation message is to be
    // displayed in the block.
    $_SESSION['webform_confirmation'][$node->nid] = array(
      'sid' => $sid,
      'confirmation_page' => $redirect_url == '<confirmation>',
    );
    drupal_page_is_cacheable(FALSE);
  }
  elseif ($redirect_url == '<none>') {
    // No redirect needed. Show a confirmatin message if there is one.
  }
  elseif ($redirect_url == '<confirmation>') {
    // No confirmation message needed because it will be shown on the
    // confirmation page.
    $message = FALSE;
    $query = array('sid' => $sid);
    if ((int) $user->uid === 0) {
      $query['token'] = webform_get_submission_access_token($submission);
    }
    $redirect = array('node/' . $node->nid . '/done', array('query' => $query));
  }
  else {
    // Clean up the redirect URL, filter it for tokens and detect external
    // domains. If the redirect is to an external URL, then don't show the
    // confirmation message.
    $redirect = webform_replace_url_tokens($redirect_url, $node, $submission);
    if ($redirect[1]['#webform_external']) {
      $message = FALSE;
    }
  }

  // Show a message if manually set.
  if (is_string($message)) {
    drupal_set_message($message);
  }
  // If redirecting and we have a confirmation message, show it as a message.
  elseif ($message) {
    drupal_set_message(webform_replace_tokens($node->webform['confirmation'], $node, $submission, NULL, $node->webform['confirmation_format']));
  }

  $form_state['redirect'] = $redirect;
}

/**
 * Post processes the submission tree with any updates from components.
 *
 * @param object $node
 *   The full webform node.
 * @param $form_values
 *   The form values for the form.
 * @param $types
 *   Optional. Specific types to perform processing.
 * @param $parent
 *   Internal use. The current parent CID whose children are being processed.
 */
function _webform_client_form_submit_process($node, &$form_values) {
  foreach ($form_values as $cid => $value) {
    if (isset($node->webform['components'][$cid])) {
      // Call the component process submission function.
      $component = $node->webform['components'][$cid];
      if ((!isset($types) || in_array($component['type'], $types)) && webform_component_implements($component['type'], 'submit')) {
        $form_values[$cid] = webform_component_invoke($component['type'], 'submit', $component, $form_values[$cid]);
      }
    }
  }
}

/**
 * Flattens a submitted values back into a single flat array representation.
 */
function _webform_client_form_submit_flatten($node, $fieldset, $parent = 0) {
  $values = array();

  if (is_array($fieldset)) {
    foreach ($fieldset as $form_key => $value) {
      if ($cid = webform_get_cid($node, $form_key, $parent)) {
        if (is_array($value) && webform_component_feature($node->webform['components'][$cid]['type'], 'group')) {
          $values += _webform_client_form_submit_flatten($node, $value, $cid);
        }
        else {
          $values[$cid] = $value;
        }
      }
      else {
        // This $form_key must belong to the parent. For example, a grid.
        $values[$parent][$form_key] = $value;
      }
    }
  }

  return $values;
}

/**
 * Prints the confirmation message after a successful submission.
 */
function _webform_confirmation($node) {
  drupal_set_title($node->title);
  webform_set_breadcrumb($node, TRUE);
  $sid = isset($_GET['sid']) ? $_GET['sid'] : NULL;
  return theme(array('webform_confirmation_' . $node->nid, 'webform_confirmation'), array('node' => $node, 'sid' => $sid));
}

/**
 * Prepare for theming of the webform form.
 */
function template_preprocess_webform_form(&$vars) {
  if (isset($vars['form']['details']['nid']['#value'])) {
    $vars['nid'] = $vars['form']['details']['nid']['#value'];
  }
  elseif (isset($vars['form']['submission']['#value'])) {
    $vars['nid'] = $vars['form']['submission']['#value']->nid;
  }

  if (!empty($vars['form']['#node']->webform['conditionals']) && empty($vars['form']['preview'])) {
    module_load_include('inc', 'webform', 'includes/webform.conditionals');
    $submission_data = isset($vars['form']['#conditional_values']) ? $vars['form']['#conditional_values'] : array();
    $settings = webform_conditional_prepare_javascript($vars['form']['#node'],
      $submission_data,
      $vars['form']['details']['page_num']['#value']);
    drupal_add_js(array('webform' => array('conditionals' => array('webform-client-form-' . $vars['nid'] => $settings))), 'setting');
  }
}

/**
 * Prepare for theming of the webform submission confirmation.
 */
function template_preprocess_webform_confirmation(&$vars) {
  $node = $vars['node'];
  // Strip out empty tags added by WYSIWYG editors if needed.
  $confirmation = $node->webform['confirmation'];
  $confirmation = strlen(trim(strip_tags($confirmation))) ? $confirmation : '';

  // Replace tokens.
  module_load_include('inc', 'webform', 'includes/webform.submissions');
  $submission = webform_get_submission($node->nid, $vars['sid']);
  $vars['confirmation_message'] = webform_replace_tokens($confirmation, $node, $submission, NULL, $node->webform['confirmation_format']);

  // URL back to form (or same page for in-block confirmations).
  $vars['url'] = empty($node->webform_block)
                    ? url('node/' . $node->nid)
                    : url(current_path(), array('query' => drupal_get_query_parameters()));

  // Progress bar.
  $vars['progressbar'] = '';
  if ($node->webform['progressbar_include_confirmation']) {
    $page_labels = webform_page_labels($node);
    $page_count = count($page_labels);
    $vars['progressbar'] = theme('webform_progressbar', array(
      'node' => $node,
      'page_num' => $page_count,
      'page_count' => $page_count,
      'page_labels' => $page_labels,
    ));
  }
}

/**
 * Prepare for theming of the webform progressbar.
 */
function template_preprocess_webform_progressbar(&$vars) {
  // Add CSS used by the progress bar.
  drupal_add_css(drupal_get_path('module', 'webform') . '/css/webform.css');

  $vars['progressbar_page_number'] = $vars['node']->webform['progressbar_page_number'];
  $vars['progressbar_percent'] = $vars['node']->webform['progressbar_percent'];
  $vars['progressbar_bar'] = $vars['node']->webform['progressbar_bar'];
  $vars['progressbar_pagebreak_labels'] = $vars['node']->webform['progressbar_pagebreak_labels'];
  $vars['progressbar_include_confirmation'] = $vars['node']->webform['progressbar_include_confirmation'];
  $vars['percent'] = ($vars['page_num'] - 1) / ($vars['page_count'] - 1) * 100;
}

/**
 * Prepare to theme the contents of e-mails sent by webform.
 */
function template_preprocess_webform_mail_message(&$vars) {
  global $user;

  $vars['user'] = $user;
  $vars['ip_address'] = webform_ip_address($vars['node']);
}

/**
 * A Form API #pre_render function. Sets display based on #title_display.
 *
 * This function is used regularly in D6 for all elements, but specifically for
 * fieldsets in D7, which don't support #title_display natively.
 */
function webform_element_title_display($element) {
  if (isset($element['#title_display']) && strcmp($element['#title_display'], 'none') === 0) {
    $element['#title'] = NULL;
  }
  return $element;
}

/**
 * A Form API #pre_render function that removes the ID from an element.
 *
 * Drupal forcibly adds IDs to all form elements, including those that do not
 * need them for any reason, such as the actions wrapper or submit buttons. We
 * use this process function wherever we wish to remove an ID from an element.
 * Because #states and #ajax require IDs, they are only removed if the states
 * and ajax arrays are empty.
 */
function webform_pre_render_remove_id($element) {
  if (empty($element['#states']) && empty($element['#ajax'])) {
    $element['#id'] = NULL;
    // Removing array parents is required to prevent theme_container from adding
    // an empty ID attribute.
    $element['#array_parents'] = NULL;
  }
  return $element;
}

/**
 * Implements template_preprocess_THEME_HOOK().
 */
function template_preprocess_webform_element(&$variables) {
  $element = &$variables['element'];

  // Ensure defaults.
  $element += array(
    '#title_display' => 'before',
    '#wrapper_attributes' => array(),
  );
  $element['#wrapper_attributes'] += array(
    'class' => array(),
  );

  // All elements using this for display only are given the "display" type.
  if (isset($element['#format']) && $element['#format'] == 'html') {
    $type = 'display';
  }
  else {
    $type = ($element['#webform_component']['type'] == 'select' && isset($element['#type'])) ? $element['#type'] : $element['#webform_component']['type'];
  }

  // Convert the parents array into a string, excluding the "submitted" wrapper.
  $nested_level = $element['#parents'][0] == 'submitted' ? 1 : 0;
  $parents = str_replace('_', '-', implode('--', array_slice($element['#parents'], $nested_level)));

  // Build up a list of classes to apply on the element wrapper.
  $wrapper_classes = array(
    'form-item',
    'webform-component',
    'webform-component-' . str_replace('_', '-', $type),
    'webform-component--' . $parents,
  );
  if (isset($element['#title_display']) && strcmp($element['#title_display'], 'inline') === 0) {
    $wrapper_classes[] = 'webform-container-inline';
  }
  $element['#wrapper_attributes']['class'] = array_merge($element['#wrapper_attributes']['class'], $wrapper_classes);

  // If #title_display is none, set it to invisible instead - none only used if
  // we have no title at all to use.
  if ($element['#title_display'] == 'none') {
    $element['#title_display'] = 'invisible';
    if (empty($element['#attributes']['title']) && !empty($element['#title'])) {
      $element['#attributes']['title'] = $element['#title'];
    }
  }

  // If #title is not set, we don't display any label or required marker.
  if (!isset($element['#title'])) {
    $element['#title_display'] = 'none';
  }

  // If an internal title is being used, generate no external title.
  if ($element['#title_display'] == 'internal') {
    $element['#title_display'] = 'none';
  }
}

/**
 * Replacement for theme_form_element().
 */
function theme_webform_element($variables) {
  $element = $variables['element'];

  $output = '<div ' . drupal_attributes($element['#wrapper_attributes']) . '>' . "\n";
  $prefix = isset($element['#field_prefix']) ? '<span class="field-prefix">' . webform_filter_xss($element['#field_prefix']) . '</span> ' : '';
  $suffix = isset($element['#field_suffix']) ? ' <span class="field-suffix">' . webform_filter_xss($element['#field_suffix']) . '</span>' : '';

  // Generate description for above or below the field.
  $above = !empty($element['#webform_component']['extra']['description_above']);
  $description = array(
    FALSE => '',
    TRUE => !empty($element['#description']) ? ' <div class="description">' . $element['#description'] . "</div>\n" : '',
  );

  // If #children does not contain an element with a matching @id, do not
  // include @for in the label.
  if (isset($variables['element']['#id']) && strpos($element['#children'], ' id="' . $variables['element']['#id'] . '"') === FALSE) {
    $variables['element']['#id'] = NULL;
  }

  // Determine whether or not this element has form control children. If so and
  // if webform_fieldset_wrap is TRUE, wrap them in a fieldset and use legend
  // instead of label.
  $has_element_children = FALSE;
  if (webform_variable_get('webform_fieldset_wrap')) {
    foreach (array_keys($element) as $key) {
      if (substr($key, 0, 1) !== '#') {
        $has_element_children = TRUE;
        break;
      }
    }
  }

  if ($has_element_children) {
    $output .= '<fieldset class="fieldset-invisible">';
  }

  switch ($element['#title_display']) {
    case 'inline':
      $output .= $description[$above];
      $description[$above] = '';
    case 'before':
    case 'invisible':
    case 'after':
      if ($has_element_children) {
        $title = '<legend>' . $element['#title'];

        if ($element['#required']) {
          $title .= ' ' . theme('form_required_marker', $variables);
        }

        $title .= '</legend>';
      }
      else {
        $title = ' ' . theme('form_element_label', $variables);
      }
      break;
  }

  $children = ' ' . $description[$above] . $prefix . $element['#children'] . $suffix;
  switch ($element['#title_display']) {
    case 'inline':
    case 'before':
    case 'invisible':
      $output .= $title;
      $output .= $children;
      break;

    case 'after':
      $output .= $children;
      $output .= $title;
      break;

    case 'none':
    case 'attribute':
      // Output no label and no required marker, only the children.
      $output .= $children;
      break;
  }
  $output .= "\n";

  $output .= $description[!$above];

  if ($has_element_children) {
    $output .= '</fieldset>';
  }

  $output .= "</div>\n";

  return $output;
}

/**
 * Output a form element in plain text format.
 */
function theme_webform_element_text($variables) {
  $element = $variables['element'];
  $value = $variables['element']['#children'];

  $output = '';
  $is_group = webform_component_feature($element['#webform_component']['type'], 'group');

  // Output the element title.
  if (isset($element['#title'])) {
    if ($is_group) {
      $output .= '==' . $element['#title'] . '==';
    }
    elseif (!in_array(drupal_substr($element['#title'], -1), array('?', ':', '!', '%', ';', '@'))) {
      $output .= $element['#title'] . ':';
    }
    else {
      $output .= $element['#title'];
    }
  }

  // Wrap long values at 65 characters, allowing for a few fieldset indents.
  // It's common courtesy to wrap at 75 characters in e-mails.
  if ($is_group && drupal_strlen($value) > 65) {
    $value = wordwrap($value, 65, "\n");
    $lines = explode("\n", $value);
    foreach ($lines as $key => $line) {
      $lines[$key] = '  ' . $line;
    }
    $value = implode("\n", $lines);
  }

  // Add the value to the output. Add a newline before the response if needed.
  $output .= (strpos($value, "\n") === FALSE ? ' ' : "\n") . $value;

  // Indent fieldsets.
  if ($is_group) {
    $lines = explode("\n", $output);
    foreach ($lines as $number => $line) {
      if (strlen($line)) {
        $lines[$number] = '  ' . $line;
      }
    }
    $output = implode("\n", $lines);
    $output .= "\n";
  }

  if ($output) {
    $output .= "\n";
  }

  return $output;
}

/**
 * Theme a radio button and another element together.
 *
 * This is used in the e-mail configuration to show a radio button and a text
 * field or select list on the same line.
 */
function theme_webform_inline_radio($variables) {
  $element = $variables['element'];

  // Add element's #type and #name as class to aid with JS/CSS selectors.
  $class = array('form-item');
  if (!empty($element['#type'])) {
    $class[] = 'form-type-' . strtr($element['#type'], '_', '-');
  }
  if (!empty($element['#name'])) {
    $class[] = 'form-item-' . strtr($element['#name'], array(' ' => '-', '_' => '-', '[' => '-', ']' => ''));
  }

  // Add container-inline to all elements.
  $class[] = 'webform-container-inline';
  if (isset($element['#inline_element']) && isset($variables['element']['#title'])) {
    $variables['element']['#title'] .= ': ';
  }

  $output = '<div class="' . implode(' ', $class) . '">' . "\n";
  $output .= ' ' . $element['#children'];
  if (!empty($element['#title'])) {
    $output .= ' ' . theme('webform_inline_radio_label', $variables) . "\n";
  }

  if (!empty($element['#description'])) {
    $output .= ' <div class="description">' . $element['#description'] . "</div>\n";
  }

  $output .= "</div>\n";

  return $output;
}

/**
 * Replacement for theme_form_element_label()
 *
 * This varies from theme_element_label in that it allows inline fields such
 * as select and input tags within the label itself.
 */
function theme_webform_inline_radio_label($variables) {
  $element = $variables['element'];
  // This is also used in the installer, pre-database setup.
  $t = get_t();

  // If title and required marker are both empty, output no label.
  if ((!isset($element['#title']) || $element['#title'] === '') && empty($element['#required'])) {
    return '';
  }

  // If the element is required, a required marker is appended to the label.
  $required = !empty($element['#required']) ? theme('form_required_marker', array('element' => $element)) : '';

  // theme_element_label() does a filter_xss() here, we skip it because we know
  // every use where this theme function is used and we need to allow input and
  // select elements.
  $title = $element['#title'];

  $attributes = isset($element['#attributes']) ? $element['#attributes'] : array();

  // Style the label as class option to display inline with the element.
  if ($element['#title_display'] == 'after') {
    $attributes['class'][] = 'option';
  }
  // Show label only to screen readers to avoid disruption in visual flows.
  elseif ($element['#title_display'] == 'invisible') {
    $attributes['class'][] = 'element-invisible';
  }

  $attributes['class'][] = 'webform-inline-radio';
  if (!empty($element['#id'])) {
    $attributes['for'] = $element['#id'];
  }

  // The leading whitespace helps visually separate fields from inline labels.
  return ' <label' . drupal_attributes($attributes) . '>' . $t('!title !required', array('!title' => $title, '!required' => $required)) . "</label>\n";
}

/**
 * Theme the headers when sending an email from webform.
 *
 * @param array $variables
 *   The variables array.
 *
 * @return array
 *   An array of headers to be used when sending a webform email. If headers
 *   for "From", "To", or "Subject" are set, they will take precedence over
 *   the values set in the webform configuration.
 */
function theme_webform_mail_headers(array $variables) {
  $headers = array(
    'X-Mailer' => 'Drupal Webform' . (ini_get('expose_php') ? ' (PHP/' . phpversion() . ')' : ''),
  );
  return $headers;
}

/**
 * Check if current user has a draft of this webform, and return the sid.
 */
function _webform_fetch_draft_sid($nid, $uid) {
  $q = db_select('webform_submissions')
    ->fields('webform_submissions', array('sid'))
    ->condition('nid', $nid)
    ->condition('uid', $uid)
    ->condition('is_draft', 1)
    ->orderBy('submitted', 'DESC');

  // Detect whether a webform draft is being edited. If so, that is the one that
  // should be returned.
  $is_webform = isset($_POST['form_id']) && stripos($_POST['form_id'], 'webform_client_form_') === 0;
  $sid_provided = !empty($_POST['details']['sid']) && is_string($_POST['details']['sid']);
  $not_finished = empty($_POST['details']['finished']);
  if ($is_webform && $sid_provided && $not_finished) {
    // Validate that the sid from $_POST belongs to the current user.
    $q->condition('sid', $_POST['details']['sid']);
    $existing_sid = TRUE;
  }

  // Retrieve exisiting draft sid.
  $sid = $q
    ->execute()
    ->fetchField();

  // Allow modules to alter the initial choice of sid when there might be more
  // than one.
  if ($sid && empty($existing_sid)) {
    $context = array(
      'nid' => $nid,
      'uid' => $uid,
    );
    drupal_alter('webform_draft', $sid, $context);
  }
  return $sid;
}

/**
 * Returns a new or cached WebformConditionals object for the specified node.
 *
 * @param object $node
 *   The loaded webform node.
 *
 * @returns object
 *   Object of type WebformConditionals, possibly with the conditionals already
 *   analyzed for dependencies.
 */
function webform_get_conditional_sorter($node) {
  return WebformConditionals::factory($node);
}

/**
 * Wrapper for webform_replace_tokens().
 *
 * @deprecated in webform:7.x-4.0 and is removed from webform:7.x-5.0. Use
 * webform_replace_tokens().
 * @see https://www.drupal.org/project/webform/issues/2038199
 */
function _webform_filter_values($string, $node = NULL, $submission = NULL, $email = NULL, $strict = TRUE) {
  $output = webform_replace_tokens($string, $node, $submission, $email, $strict);
  return $strict ? webform_filter_xss($output) : $output;
}

/**
 * Replace tokens with Webform contexts populated.
 *
 * @param $string
 *   The string to have its tokens replaced.
 * @param object $node
 *   If replacing node-level tokens, the node for which tokens will be created.
 * @param $submission
 *   If replacing submission-level tokens, the submission for which tokens will
 *   be created.
 * @param $email
 *   If replacing tokens within the context of an e-mail, the Webform e-mail
 *   settings array.
 * @param $sanitize
 *   Boolean or format name value indicating if the results will be displayed as
 *   HTML output. If FALSE, the contents returned will be unsanitized. This will
 *   also result in all Webform submission tokens being returned as plain-text,
 *   without HTML markup, in preparation for e-mailing or other text-only
 *   purposes (default values, etc.). If TRUE, the tokens only are sanitized by
 *   token_replace. Otherwise $sanitize is the machine name of an import filter
 *   to be used with check_markup().
 */
function webform_replace_tokens($string, $node = NULL, $submission = NULL, $email = NULL, $sanitize = FALSE) {
  // Don't do any filtering if the string is empty.
  if (!strlen(trim($string)) || !webform_variable_get('webform_token_access')) {
    return $string;
  }

  $token_data = array();
  if ($node) {
    $token_data['node'] = $node;
  }
  if ($submission) {
    $token_data['webform-submission'] = $submission;
  }
  if ($email) {
    $token_data['webform-email'] = $email;
  }
  $clear = is_bool($sanitize);
  $string = token_replace($string, $token_data, array('clear' => $clear, 'sanitize' => $sanitize === TRUE));
  if (!$clear) {
    $string = webform_replace_tokens_clear(check_markup($string, $sanitize));
  }
  return $string;
}

/**
 * Removes tokens from string.
 *
 * Call this function in cases where you need to remove unreplaced tokens but
 * can't call webform_replace_tokens() with the option $clear = TRUE.
 *
 * In some cases the function token_replace() in webform_replace_tokens() needs
 * to be called with the option 'clear' => FALSE, to not remove input filters.
 * For security reasons webform_replace_tokens() is called before
 * check_markup(), where input filters get replaced. Tokens won't be replaced if
 * there is no value provided. These tokens, that is, [current-page:query:*]
 * needs to be removed to not show up in the output.
 *
 * Note: This function was previously named webform_clear_tokens, which
 * conflicted with the webform_clear module, being called as hook_tokens.
 *
 * @param string $text
 *   The text to have its tokens removed.
 *
 * @return mixed|string
 *   Replace tokens with actual value.
 *
 * @see token_replace()
 */
function webform_replace_tokens_clear($text) {
  if (empty($text) || !webform_variable_get('webform_token_access')) {
    return $text;
  }

  $text_tokens = token_scan($text);
  if (empty($text_tokens)) {
    return $text;
  }

  $replacements = array();
  foreach ($text_tokens as $type => $tokens) {
    $replacements += array_fill_keys($tokens, '');
  }

  $tokens = array_keys($replacements);
  $values = array_values($replacements);

  return str_replace($tokens, $values, $text);
}

/**
 * Replace tokens within a URL, encoding the parts within the query string.
 *
 * @param string $redirect_url
 *   The redirect URL, with everything other than tokens already URL encoded.
 * @param object $node
 *   If replacing node-level tokens, the node for which tokens will be created.
 * @param $submission
 *   If replacing submission-level tokens, the submission for which tokens will
 *   be created.
 *
 * @return array
 *   An array of path and url() options, suitable for a redirect or drupal_goto.
 */
function webform_replace_url_tokens($redirect_url, $node = NULL, $submission = NULL) {
  // Parse the url into its components.
  $parsed_redirect_url = drupal_parse_url($redirect_url);
  // Replace tokens in each component.
  $parsed_redirect_url['path'] = webform_replace_tokens($parsed_redirect_url['path'], $node, $submission);
  if (!empty($parsed_redirect_url['query'])) {
    foreach ($parsed_redirect_url['query'] as $key => $value) {
      $parsed_redirect_url['query'][$key] = trim(webform_replace_tokens($value, $node, $submission));
    }
  }
  $parsed_redirect_url['fragment'] = webform_replace_tokens($parsed_redirect_url['fragment'], $node, $submission);
  // Determine whether the path is internal or external. Paths which contain the
  // site's base url are still considered internal. #webform_external is private
  // to webform.
  $parsed_redirect_url['#webform_external'] = url_is_external($parsed_redirect_url['path']);
  foreach (array(NULL, TRUE, FALSE) as $https) {
    if (stripos($parsed_redirect_url['path'], url('', array('absolute' => TRUE, 'https' => $https))) === 0) {
      $parsed_redirect_url['#webform_external'] = FALSE;
    }
  }
  // Return an array suitable for a form redirect or drupal_goto.
  return array($parsed_redirect_url['path'], $parsed_redirect_url);
}

/**
 * Replace tokens in descriptions and sanitize according to Webform settings.
 */
function webform_filter_descriptions($string, $node = NULL, $submission = NULL) {
  return strlen($string) == 0 ? '' : webform_filter_xss(webform_replace_tokens($string, $node, $submission));
}

/**
 * Duplicates webform_filter_descriptions().
 *
 * @deprecated in webform:7.x-4.0 and is removed from webform:7.x-5.0. Use
 * webform_filter_descriptions().
 * @see https://www.drupal.org/project/webform/issues/2038199
 */
function _webform_filter_descriptions($string, $node = NULL, $submission = NULL) {
  return webform_filter_descriptions($string, $node, $submission);
}

/**
 * Filter labels for display by running through XSS checks.
 */
function webform_filter_xss($string) {
  static $allowed_tags;
  $allowed_tags = isset($allowed_tags) ? $allowed_tags : webform_variable_get('webform_allowed_tags');
  return filter_xss($string, $allowed_tags);
}

/**
 * Duplicates webform_filter_xss().
 *
 * @deprecated in webform:7.x-4.0 and is removed from webform:7.x-5.0. Use
 * webform_filter_xss().
 * @see https://www.drupal.org/project/webform/issues/2038199
 */
function _webform_filter_xss($string) {
  return webform_filter_xss($string);
}

/**
 * Utility function to ensure that a webform record exists in the database.
 *
 * @param object $node
 *   The node object to check if a database entry exists.
 *
 * @return bool
 *   This function should always return TRUE if no errors were encountered,
 *   ensuring that a webform table row has been created. Will return FALSE if
 *   a record does not exist and a new one could not be created.
 */
function webform_ensure_record(&$node) {
  if (!$node->webform['record_exists']) {
    // Even though webform_node_insert() would set this property to TRUE,
    // we set record_exists to trigger a difference from the defaults.
    $node->webform['record_exists'] = TRUE;
    webform_node_insert($node);
  }
  return $node->webform['record_exists'];
}

/**
 * Utility function to check if a webform record is necessary in the database.
 *
 * If the node is no longer using any webform settings, this function will
 * delete the settings from the webform table. Note that this function will NOT
 * delete rows from the webform table if the node-type is exclusively used for
 * webforms (per the "webform_node_types_primary" variable).
 *
 * @param object $node
 *   The node object to check if a database entry is still required.
 *
 * @return bool
 *   Returns TRUE if the webform still has a record in the database. Returns
 *   FALSE if the webform does not have a record or if the previously existing
 *   record was just deleted.
 */
function webform_check_record(&$node) {
  $webform = $node->webform;
  $webform['record_exists'] = FALSE;
  unset($webform['nid']);

  // Don't include empty values in the comparison, this makes it so modules that
  // extend Webform with empty defaults won't affect cleanup of rows.
  $webform = array_filter($webform);
  $defaults = array_filter(webform_node_defaults());
  if ($webform == $defaults && !in_array($node->type, webform_variable_get('webform_node_types_primary'))) {
    webform_node_delete($node);
    $node->webform = webform_node_defaults();
  }
  return $node->webform['record_exists'];
}

/**
 * Given a component's form_key and optionally its parent's cid, get its cid(s).
 *
 * @param object $node
 *   A fully loaded webform node object.
 * @param string $form_key
 *   The form key for which to find the cid(s).
 * @param int|null $pid
 *   The cid of the parent component.
 *
 * @return int|int[]
 *   The cid of the component or an array of component ids.
 */
function webform_get_cid($node, $form_key, $pid = NULL) {
  if ($pid === NULL) {
    $cids = array();
    foreach ($node->webform['components'] as $cid => $component) {
      if ((string) $component['form_key'] === (string) $form_key) {
        $cids[] = $cid;
      }
    }
    return $cids;
  }
  else {
    foreach ($node->webform['components'] as $cid => $component) {
      if ((string) $component['form_key'] === (string) $form_key && $component['pid'] == $pid) {
        return $cid;
      }
    }
  }
}

/**
 * Find the label of a given page based on page breaks.
 *
 * @param object $node
 *   The webform node.
 * @param $form_state
 *   The form's state, if available
 *
 * @return array
 *   An array of all page labels, indexed by page number.
 */
function webform_page_labels($node, $form_state = array()) {
  $page_count = 1;
  $page_labels = array();
  $page_labels[0] = t($node->webform['progressbar_label_first']);
  foreach ($node->webform['components'] as $component) {
    if ($component['type'] == 'pagebreak') {
      if (module_exists('webform_localization')) {
        module_load_include('inc', 'webform_localization', 'includes/webform_localization.i18n');
        $string = webform_localization_i18n_string_name($component['nid'], $component['cid'], '#title');
        $component['name'] = i18n_string($string, $component['name'], array(
          'update' => TRUE,
          'sanitize' => FALSE,
        ));
      }
      $page_labels[$page_count] = $component['name'];
      $page_count++;
    }
  }
  if ($node->webform['preview'] || !empty($form_state['webform']['preview'])) {
    $page_labels[] = $node->webform['preview_title'] ? t($node->webform['preview_title']) : t('Preview');
  }
  if ($node->webform['progressbar_include_confirmation']) {
    $page_labels[] = t($node->webform['progressbar_label_confirmation']);
  }
  return $page_labels;
}

/**
 * Retrieve a Drupal variable with the appropriate default value.
 */
function webform_variable_get($variable) {
  switch ($variable) {
    case 'webform_blocks':
      $result = variable_get('webform_blocks', array());
      break;

    case 'webform_tracking_mode':
      $result = variable_get('webform_tracking_mode', 'cookie');
      break;

    case 'webform_allowed_tags':
      $result = variable_get('webform_allowed_tags', array('a', 'em', 'strong', 'code', 'img'));
      break;

    case 'webform_email_address_format':
      $result = variable_get('webform_email_address_format', 'long');
      break;

    case 'webform_email_address_individual':
      $result = variable_get('webform_email_address_individual', 0);
      break;

    case 'webform_default_from_name':
      $result = variable_get('webform_default_from_name', variable_get('site_name', ''));
      break;

    case 'webform_default_from_address':
      $result = variable_get('webform_default_from_address', variable_get('site_mail', ini_get('sendmail_from')));
      break;

    case 'webform_default_subject':
      $result = variable_get('webform_default_subject', t('Form submission from: [node:title]'));
      break;

    case 'webform_email_replyto':
      $result = variable_get('webform_email_replyto', TRUE);
      break;

    case 'webform_email_html_capable':
      $result = variable_get('webform_email_html_capable', FALSE);
      break;

    case 'webform_default_format':
      $result = variable_get('webform_default_format', 0);
      break;

    case 'webform_format_override':
      $result = variable_get('webform_format_override', 0);
      break;

    case 'webform_email_select_max':
      $result = variable_get('webform_email_select_max', 50);
      break;

    case 'webform_node_types':
      $result = webform_node_types();
      break;

    case 'webform_node_types_primary':
      $result = variable_get('webform_node_types_primary', array('webform'));
      break;

    case 'webform_date_type':
      $result = variable_get('webform_date_type', 'medium');
      break;

    case 'webform_export_format':
      module_load_include('inc', 'webform', 'includes/webform.export');
      $options = webform_export_list();
      $result = variable_get('webform_export_format', 'excel');
      $result = isset($options[$result]) ? $result : key($options);
      break;

    case 'webform_csv_delimiter':
      $result = variable_get('webform_csv_delimiter', '\t');
      break;

    case 'webform_csv_line_ending':
      $result = variable_get('webform_csv_line_ending', "\n");
      break;

    case 'webform_export_wordwrap':
      $result = variable_get('webform_export_wordwrap', 0);
      break;

    case 'webform_excel_legacy_exporter':
      $result = variable_get('webform_excel_legacy_exporter', 0);
      break;

    case 'webform_progressbar_style':
      $result = variable_get('webform_progressbar_style', array('progressbar_bar', 'progressbar_pagebreak_labels', 'progressbar_include_confirmation'));
      break;

    case 'webform_progressbar_label_first':
      $result = variable_get('webform_progressbar_label_first', t('Start'));
      break;

    case 'webform_progressbar_label_confirmation':
      $result = variable_get('webform_progressbar_label_confirmation', t('Complete'));
      break;

    case 'webform_table':
      $result = variable_get('webform_table', FALSE);
      break;

    case 'webform_submission_access_control':
      $result = variable_get('webform_submission_access_control', 1);
      break;

    case 'webform_token_access':
      $result = variable_get('webform_token_access', 1);
      break;

    case 'webform_update_batch_size':
      $result = variable_get('webform_update_batch_size', 100);
      break;

    case 'webform_disabled_components':
      $result = variable_get('webform_disabled_components', array());
      break;

    case 'webform_fieldset_wrap':
      $result = variable_get('webform_fieldset_wrap', FALSE);
      break;
  }
  return $result;
}

/**
 * Output the contents of token help used throughout Webform.
 *
 * In earlier versions of Token, a fieldset is used to show all the tokens.
 * Later versions now use a modal dialog that is accessed through a link. If
 * Token module is not available, a message should be displayed.
 */
function theme_webform_token_help($variables) {
  if (!webform_variable_get('webform_token_access')) {
    return '';
  }
  $groups = $variables['groups'];

  // Assume dialogs are not supported, show as a fieldset.
  $help = array(
    '#title' => t('Token values'),
    '#type' => 'fieldset',
    '#collapsible' => TRUE,
    '#collapsed' => TRUE,
    '#attributes' => array('class' => array('collapsible', 'collapsed')),
    'help' => array(
      '#markup' => '<p>' . t('This field supports dynamic token values. Common values might be [current-user:mail] or [node:title].') . '</p>',
    ),
    'token_tree' => array(
      '#theme' => 'token_tree',
      '#token_types' => $groups,
    ),
  );

  if (!module_exists('token')) {
    // No token module at all. Display a simple suggestion to enable it.
    $help['help']['#markup'] .= '<p>' . t('A full listing of tokens may be listed here by installing the <a href="http://drupal.org/project/token">Token module</a>.') . '</p>';
    unset($help['token_tree']);
  }
  else {
    module_load_include('inc', 'token', 'token.pages');
    if (function_exists('token_page_output_tree')) {
      // Token supports dialogs: display simply as a link.
      $help = $help['token_tree'];
      $help['#dialog'] = TRUE;
    }
  }

  return render($help);
}

/**
 * Convert a name into an identifier.
 *
 * The identifier is safe for machine names, classes, and other ASCII uses.
 */
function _webform_safe_name($name) {
  $new = trim($name);
  $new = _webform_transliterate($new);
  $new = str_replace(array(' ', '-', '/'), array('_', '_', '_'), $new);
  $new = drupal_strtolower($new);
  $new = preg_replace('/[^a-z0-9_]/', '', $new);
  return $new;
}

/**
 * Transliterate common non-English characters to 7-bit ASCII.
 */
function _webform_transliterate($name) {
  // If transliteration is available, use it to convert names to ASCII.
  return function_exists('transliteration_get')
            ? transliteration_get($name, '')
            : str_replace(array('€', 'ƒ', 'Š', 'Ž', 'š', 'ž', 'Ÿ', '¢', '¥', 'µ', 'À', 'Á', 'Â', 'Ã', 'Ä', 'Å', 'Ç', 'È', 'É', 'Ê', 'Ë', 'Ì', 'Í', 'Î', 'Ï', 'Ñ', 'Ò', 'Ó', 'Ô', 'Õ', 'Ö', 'Ø', 'Ù', 'Ú', 'Û', 'Ü', 'Ý', 'à', 'á', 'â', 'ã', 'ä', 'å', 'ç', 'è', 'é', 'ê', 'ë', 'ì', 'í', 'î', 'ï', 'ñ', 'ò', 'ó', 'ô', 'õ', 'ö', 'ø', 'ù', 'ú', 'û', 'ü', 'ý', 'ÿ', 'Œ', 'œ', 'Æ', 'Ð', 'Þ', 'ß', 'æ', 'ð', 'þ'),
                          array('E', 'f', 'S', 'Z', 's', 'z', 'Y', 'c', 'Y', 'u', 'A', 'A', 'A', 'A', 'A', 'A', 'C', 'E', 'E', 'E', 'E', 'I', 'I', 'I', 'I', 'N', 'O', 'O', 'O', 'O', 'O', 'O', 'U', 'U', 'U', 'U', 'Y', 'a', 'a', 'a', 'a', 'a', 'a', 'c', 'e', 'e', 'e', 'e', 'i', 'i', 'i', 'i', 'n', 'o', 'o', 'o', 'o', 'o', 'o', 'u', 'u', 'u', 'u', 'y', 'y', 'OE', 'oe', 'AE', 'DH', 'TH', 'ss', 'ae', 'dh', 'th'),
                          $name);
}

/**
 * Given an email address and a name, format an e-mail address.
 *
 * The address can be the cid of a component with multiple values. When $single
 * is true, a single address is return (the first of any multiples). When not
 * true, an array of addresses is returned.
 *
 * Note that multiple names could be used with multiple addresses, but this
 * capability is not currently possible with the webform UI. Separate names
 * are only used with the From address, which is always single.
 *
 * @param $address
 *   The e-mail address.
 * @param $name
 *   The name to be used in the formatted address. If the address contains a
 *   name in 'Some Name <somename@example.com>' format, $name is ignored.
 * @param object $node
 *   The webform node if replacements will be done.
 * @param $submission
 *   The webform submission values if replacements will be done.
 * @param $encode
 *   Encode the text for use in an e-mail.
 * @param $single
 *   Force a single value to be returned, even if a component expands to
 *   multiple addresses. This is useful to ensure a single e-mail will be
 *   returned for the "From" address.
 * @param $format
 *   The e-mail format, defaults to the site-wide setting. May be "short",
 *   "long", or NULL for the system default.
 * @param $mapping
 *   A mapping array to be applied to the address values.
 *
 * @return string|array
 *   The formatted e-mail address -- or addresses (if not $single)
 */
function webform_format_email_address($address, $name, $node = NULL, $submission = NULL, $encode = TRUE, $single = TRUE, $format = NULL, $mapping = NULL) {
  if (!isset($format)) {
    $format = webform_variable_get('webform_email_address_format');
  }

  if ($name == 'default') {
    $name = webform_variable_get('webform_default_from_name');
  }
  elseif (is_numeric($name) && isset($node->webform['components'][$name])) {
    if (isset($submission->data[$name])) {
      $component = $node->webform['components'][$name];
      $name = $submission->data[$name];

      // Convert the FROM name to be the label of select lists.
      if (webform_component_implements($component['type'], 'options')) {
        $options = webform_component_invoke($component['type'], 'options', $component);
        foreach ($name as &$one_name) {
          $one_name = isset($options[$one_name]) ? $options[$one_name] : $one_name;
        }
        // Drop PHP reference.
        unset($one_name);
      }
    }
    else {
      $name = t('Value of !component', array('!component' => $node->webform['components'][$name]['name']));
    }
  }
  elseif (!isset($name)) {
    $name = '';
  }

  if ($address == 'default') {
    $address = webform_variable_get('webform_default_from_address');
  }
  elseif (is_numeric($address) && isset($node->webform['components'][$address])) {
    if (isset($submission->data[$address])) {
      $values = $submission->data[$address];
      $address = array();
      foreach ($values as $value) {
        if (isset($mapping) && isset($mapping[$value])) {
          $value = $mapping[$value];
        }
        $address = array_merge($address, explode(',', $value));
      }
    }
    else {
      $address = t('Value of "!component"', array('!component' => $node->webform['components'][$address]['name']));
    }
  }

  // Convert single values to an array to simplify processing.
  $address = is_array($address) ? $address : explode(',', $address);
  $name = is_array($name) ? $name : array($name);
  $name_shortage = count($address) - count($name);
  if ($name_shortage > 0) {
    $name += array_fill(count($name), $name_shortage, $name[0]);
  }

  foreach ($address as $key => $individual_address) {
    $individual_address = trim($individual_address);
    $individual_address = webform_replace_tokens($individual_address, $node, $submission);
    $email_parts = webform_parse_email_address($individual_address);
    if ($format == 'long' && !empty($name[$key]) && !strlen($email_parts['name'])) {
      $individual_name = $name[$key];
      $individual_name = webform_replace_tokens($individual_name, $node, $submission);
      if ($encode) {
        $individual_name = mime_header_encode($individual_name);
      }
      $individual_name = trim($individual_name);
      $individual_address = '"' . $individual_name . '" <' . $individual_address . '>';
    }
    $address[$key] = $individual_address;
  }

  return $single ? reset($address) : $address;
}

/**
 * Validates an email form element.
 *
 * @param string $emails
 *   An email or list of comma-seperated email addresses. Passed by reference.
 *   Empty emails will be eliminated, and mutiple addresses will be seperated
 *   with a comma and space.
 * @param string $form_name
 *   The name of the form element to receive an error, in form_set_error format.
 * @param bool $allow_empty
 *   TRUE if optional. FALSE if required.
 * @param bool $allow_multiple
 *   TRUE if a list of emails is allowed. FALSE if only one.
 * @param bool $allow_tokens
 *   TRUE if any token should be assumed to contain a valid e-mail address.
 * @param string $format
 *   'short', 'long', or NULL (for default) format. Long format has a name and
 *   the address in angle brackets.
 *
 * @return int|bool
 *   The number of valid addresses found, or FALSE for an invalid email found.
 */
function webform_email_validate(&$emails, $form_name, $allow_empty, $allow_multiple, $allow_tokens, $format = NULL) {
  $nr_valid = webform_valid_email_address($emails, $allow_tokens, $format);
  if ($nr_valid === FALSE) {
    form_set_error($form_name, t('The entered e-mail address "@email" does not appear valid.', array('@email' => $emails)));
  }
  elseif ($nr_valid === 0 && !$allow_empty) {
    form_set_error($form_name, t('When adding a new custom e-mail, the e-mail field is required.'));
  }
  elseif ($nr_valid > 1 && !$allow_multiple) {
    form_set_error($form_name, t('Only one e-mail address is allowed.'));
  }
  return $nr_valid;
}

/**
 * Validates email address(es) with optional name(s).
 *
 * @param string $emails
 *   An email address, a list of comma-separated email addresses. If all the
 *   addresses are valid, the list of trimmed, non-empty emails is returned by
 *   reference.
 * @param bool $allow_tokens
 *   TRUE if any token should be assumed to contain a valid e-mail address.
 * @param string $format
 *   'short', 'long', or NULL (for default) format. Long format has a name and
 *   the address in angle brackets.
 *
 * @return bool|int
 *   Returns FALSE if an invalid e-mail address was found, 0 if no email
 *   address(es) were found, or the number of valid e-mail addresses found.
 */
function webform_valid_email_address(&$emails, $allow_tokens = FALSE, $format = NULL) {
  $email_array = array_filter(array_map('trim', explode(',', $emails)));
  $count = 0;
  foreach ($email_array as $email) {
    if ($allow_tokens && webform_variable_get('webform_token_access')) {
      foreach (token_scan($email) as $tokens) {
        foreach ($tokens as $token) {
          $email = str_replace($token, 'admin@example.com', $email);
        }
      }
    }
    $matches = webform_parse_email_address($email, $format);
    if (!valid_email_address($matches['address'])) {
      return FALSE;
    }
    $count++;
  }
  $emails = implode(', ', $email_array);
  return $count;
}

/**
 * Parses an e-mail address into name and address.
 *
 * @param string $email
 *   The email address to be parsed, with an optional name.
 * @param string $format
 *   'short', 'long', or NULL (for default) format. Long format has a name and
 *   the address in angle brackets.
 *
 * @return array
 *   Associative array indexed by 'name' and 'address'.
 */
function webform_parse_email_address($email, $format = NULL) {
  if (!$format) {
    $format = webform_variable_get('webform_email_address_format');
  }
  if ($format == 'long') {
    // Match e-mails of the form 'My Name <email@domain.com>'.
    preg_match('/^"?([^<]*?)"? *(?:<(.*)>)?$/', $email, $matches);
    if (isset($matches[2]) && strlen($matches[2])) {
      return array(
        'name' => $matches[1],
        'address' => $matches[2],
      );
    }
  }
  return array(
    'name' => '',
    'address' => $email,
  );
}

/**
 * Given an email subject, format it with any needed replacements.
 */
function webform_format_email_subject($subject, $node = NULL, $submission = NULL) {
  if ($subject == 'default') {
    $subject = webform_variable_get('webform_default_subject');
  }
  elseif (is_numeric($subject) && isset($node->webform['components'][$subject])) {
    $component = $node->webform['components'][$subject];
    if (isset($submission->data[$subject])) {
      $display_function = '_webform_display_' . $component['type'];
      $value = $submission->data[$subject];

      // Convert the value to a clean text representation if possible.
      if (function_exists($display_function)) {
        $display = $display_function($component, $value, 'text');
        $display['#theme_wrappers'] = array();
        $display['#webform_component'] = $component;
        $subject = str_replace("\n", ' ', drupal_render($display));
      }
      else {
        $subject = $value;
      }
    }
    else {
      $subject = t('Value of "!component"', array('!component' => $component['name']));
    }
  }

  // Convert arrays to strings (may happen if checkboxes are used as the value).
  if (is_array($subject)) {
    $subject = reset($subject);
  }

  return webform_replace_tokens($subject, $node, $submission);
}

/**
 * Convert an array of components into a tree.
 */
function _webform_components_tree_build($src, &$tree, $parent, &$page_count) {
  foreach ($src as $cid => $component) {
    if ($component['pid'] == $parent) {
      _webform_components_tree_build($src, $component, $cid, $page_count);
      if ($component['type'] == 'pagebreak') {
        $page_count++;
      }
      $tree['children'][$cid] = $component;
      $tree['children'][$cid]['page_num'] = $page_count;
    }
  }
  return $tree;
}

/**
 * Flatten a component tree into a flat list.
 */
function _webform_components_tree_flatten($tree) {
  $components = array();
  foreach ($tree as $cid => $component) {
    if (isset($component['children'])) {
      unset($component['children']);
      $components[$cid] = $component;
      // array_merge() can't be used here because the keys are numeric.
      $children = _webform_components_tree_flatten($tree[$cid]['children']);
      foreach ($children as $ccid => $ccomponent) {
        $components[$ccid] = $ccomponent;
      }
    }
    else {
      $components[$cid] = $component;
    }
  }
  return $components;
}

/**
 * Helper for the uasort in webform_tree_sort()
 */
function _webform_components_sort($a, $b) {
  if ($a['weight'] == $b['weight']) {
    return strcasecmp($a['name'], $b['name']);
  }
  return ($a['weight'] < $b['weight']) ? -1 : 1;
}

/**
 * Sort each level of a component tree by weight and name.
 */
function _webform_components_tree_sort($tree) {
  if (isset($tree['children']) && is_array($tree['children'])) {
    $children = array();
    uasort($tree['children'], '_webform_components_sort');
    foreach ($tree['children'] as $cid => $component) {
      $children[$cid] = _webform_components_tree_sort($component);
    }
    $tree['children'] = $children;
  }
  return $tree;
}

/**
 * Get a list of all available component definitions.
 */
function webform_components($include_disabled = FALSE, $reset = FALSE) {
  static $components, $enabled;

  if (!isset($components) || $reset) {
    $components = array();
    $disabled = array_flip(webform_variable_get('webform_disabled_components'));
    foreach (module_implements('webform_component_info') as $module) {
      $module_components = module_invoke($module, 'webform_component_info');
      foreach ($module_components as $type => $info) {
        $module_components[$type]['module'] = $module;
        $module_components[$type]['enabled'] = !array_key_exists($type, $disabled);
      }
      $components += $module_components;
    }
    drupal_alter('webform_component_info', $components);
    uasort($components, function ($a, $b) {
      return strnatcasecmp($a['label'], $b['label']);
    });
    $enabled = array_diff_key($components, $disabled);
  }

  return $include_disabled ? $components : $enabled;
}

/**
 * Build a list of components suitable for use as select list options.
 */
function webform_component_options($include_disabled = FALSE) {
  $component_info = webform_components($include_disabled);
  $options = array();
  foreach ($component_info as $type => $info) {
    $options[$type] = $info['label'];
  }
  return $options;
}

/**
 * Load a component file into memory.
 *
 * @param $component_type
 *   The string machine name of a component.
 */
function webform_component_include($component_type) {
  static $included = array();

  // No need to load components that have already been added once.
  if (!isset($included[$component_type])) {
    $components = webform_components(TRUE);
    $included[$component_type] = TRUE;

    if (isset($components[$component_type]['file'])) {
      $info = $components[$component_type];
      $pathinfo = pathinfo($info['file']);
      $basename = basename($pathinfo['basename'], '.' . $pathinfo['extension']);
      $path = (!empty($pathinfo['dirname']) ? $pathinfo['dirname'] . '/' : '') . $basename;
      module_load_include($pathinfo['extension'], $info['module'], $path);
    }
  }
}

/**
 * Invoke a component callback.
 *
 * @param $type
 *   The component type as a string.
 * @param $callback
 *   The callback to execute.
 * @param ...
 *   Any additional parameters required by the $callback.
 *
 * @return mixed
 *   Return value of the callback on success and FALSE on failure.
 */
function webform_component_invoke($type, $callback) {
  $args = func_get_args();
  $type = array_shift($args);
  $callback = array_shift($args);
  $function = '_webform_' . $callback . '_' . $type;
  webform_component_include($type);
  if (function_exists($function)) {
    return call_user_func_array($function, $args);
  }
}

/**
 * Check if a component implements a particular hook.
 *
 * @param $type
 *   The component type as a string.
 * @param $callback
 *   The callback to check.
 *
 * @return bool
 *   Whether or not the hook is implemented.
 */
function webform_component_implements($type, $callback) {
  $function = '_webform_' . $callback . '_' . $type;
  webform_component_include($type);
  return function_exists($function);
}

/**
 * Form API #process function to expand a webform conditional element.
 */
function webform_conditional_expand($element) {
  module_load_include('inc', 'webform', 'includes/webform.conditionals');
  return _webform_conditional_expand($element);
}

/**
 * Add class and wrapper class attributes to an element.
 */
function _webform_component_classes(&$element, $component) {
  if (isset($component['extra']['css_classes']) && drupal_strlen($component['extra']['css_classes'])) {
    $element['#attributes']['class'] = isset($element['#attributes']['class']) ? $element['#attributes']['class'] : array();
    $element['#attributes']['class'] = array_merge($element['#attributes']['class'], explode(' ', $component['extra']['css_classes']));
  }
  if (isset($component['extra']['wrapper_classes']) && drupal_strlen($component['extra']['wrapper_classes'])) {
    $element['#wrapper_attributes']['class'] = isset($element['#wrapper_attributes']['class']) ? $element['#wrapper_attributes']['class'] : array();
    $element['#wrapper_attributes']['class'] = array_merge($element['#wrapper_attributes']['class'], explode(' ', $component['extra']['wrapper_classes']));
  }
}

/**
 * Disable the Drupal page cache.
 */
function webform_disable_page_cache() {
  drupal_page_is_cacheable(FALSE);
}

/**
 * Set the necessary breadcrumb for the page we are on.
 *
 * @param object $node
 *   The loaded webform node.
 * @param bool|object $submission
 *   The submission if the current page is viewing or dealing with a submission,
 *   or TRUE to just include the webform node in the breadcrumbs (used for
 *   the submission completion confirmation page), or NULL for no extra
 *   processing.
 */
function webform_set_breadcrumb($node, $submission = NULL) {
  $node_path = "node/{$node->nid}";

  // Set the href of the current menu item to be the node's path. This has two
  // effects. The active trail will be to the node's prefered menu tree
  // location, expanding the menu as appropriate. And the breadcrumbs will be
  // set as if the current page were under the node's preferred location.
  // Note that menu_tree_set_path() could be used to set the path for the menu,
  // but it will not affect the breadcrumbs when the webform is not in the
  // default menu.
  menu_set_item(NULL, array('href' => $node_path) + menu_get_item());

  if ($submission) {
    $breadcrumb = menu_get_active_breadcrumb();

    // Append the node title (or its menu name), in case it isn't in the path
    // already.
    $active_trail = menu_get_active_trail();
    $last_active = end($active_trail);
    $breadcrumb[] = $last_active['href'] === $node_path && !empty($last_active['in_active_trail'])
                      ? l($last_active['title'], $node_path, $last_active['localized_options'])
                      : l($node->title, $node_path);

    // Setting the current menu href will cause the submission title and current
    // tab (if not the default tab) to be added to the active path when the
    // webform is in the default location in the menu (node/NID). The title
    // is desirable, but the tab name (for example Edit or Delete) isn't.
    if (preg_match('/href=".*"/', end($breadcrumb), $matches)) {
      foreach ($breadcrumb as $index => $link) {
        if (stripos($link, $matches[0]) !== FALSE) {
          $breadcrumb = array_slice($breadcrumb, 0, $index + 1);
          break;
        }
      }
    }

    // If the user is dealing with a submission, then the breadcrumb should
    // be fudged to allow them to return to a likely list of webforms.
    // Note that this isn't necessarily where they came from, but it's the
    // best guess available.
    if (is_object($submission)) {
      if (webform_results_access($node)) {
        $breadcrumb[] = l(t('Webform results'), $node_path . '/webform-results');
      }
      elseif (user_access('access own webform results')) {
        $breadcrumb[] = l(t('Submissions'), $node_path . '/submissions');
      }
    }

    drupal_set_breadcrumb($breadcrumb);
  }
}

/**
 * Convert an ISO 8601 date or time into an array.
 *
 * This converts full format dates or times. Either a date or time may be
 * provided, in which case only those portions will be returned. Dashes and
 * colons must be used, never implied.
 *
 * Formats:
 * Dates: YYYY-MM-DD
 * Times: HH:MM:SS
 * Datetimes: YYYY-MM-DDTHH:MM:SS
 *
 * @param $string
 *   An ISO 8601 date, time, or datetime.
 * @param $type
 *   If wanting only specific fields back, specify either "date" or "time".
 *   Leaving empty will return an array with both date and time keys, even if
 *   some are empty. Returns an array with the following keys:
 *   - year
 *   - month
 *   - day
 *   - hour (in 24hr notation)
 *   - minute
 *   - second
 *
 * @return array
 *   Date in array formate.
 */
function webform_date_array($string, $type = NULL) {
  $pattern = '/((\d{4}?)-(\d{2}?)-(\d{2}?))?(T?(\d{2}?):(\d{2}?):(\d{2}?))?/';
  $matches = array();
  preg_match($pattern, $string, $matches);
  $matches += array_fill(0, 9, '');

  $return = array();

  // Check for a date string.
  if ($type == 'date' || !isset($type)) {
    $return['year'] = $matches[2] !== '' ? (int) $matches[2] : '';
    $return['month'] = $matches[3] !== '' ? (int) $matches[3] : '';
    $return['day'] = $matches[4] !== '' ? (int) $matches[4] : '';
  }

  // Check for a time string.
  if ($type == 'time' || !isset($type)) {
    $return['hour'] = $matches[6] !== '' ? (int) $matches[6] : '';
    $return['minute'] = $matches[7] !== '' ? (int) $matches[7] : '';
    $return['second'] = $matches[8] !== '' ? (int) $matches[8] : '';
  }

  return $return;
}

/**
 * Convert an array of a date or time into an ISO 8601 compatible string.
 *
 * @param $array
 *   The array to convert to a date or time string.
 * @param $type
 *   If wanting a specific string format back specify either "date" or "time".
 *   Otherwise a full ISO 8601 date and time string will be returned.
 *
 * @return string
 *   Date in string format
 */
function webform_date_string($array, $type = NULL) {
  $string = '';

  if ($type == 'date' || !isset($type)) {
    $string .= empty($array['year']) ? '0000' : sprintf('%04d', $array['year']);
    $string .= '-';
    $string .= empty($array['month']) ? '00' : sprintf('%02d', $array['month']);
    $string .= '-';
    $string .= empty($array['day']) ? '00' : sprintf('%02d', $array['day']);
  }

  if (!isset($type)) {
    $string .= 'T';
  }

  if ($type == 'time' || !isset($type)) {
    $string .= empty($array['hour']) ? '00' : sprintf('%02d', $array['hour']);
    $string .= ':';
    $string .= empty($array['minute']) ? '00' : sprintf('%02d', $array['minute']);
    $string .= ':';
    $string .= empty($array['second']) ? '00' : sprintf('%02d', $array['second']);
  }

  return $string;
}

/**
 * Get a date format according to the site settings.
 *
 * @param $type
 *   A choice of 'short', 'medium', 'long' , or other user-defined date formats.
 *   Use NULL for the webform-specific date format choosen in the webform
 *   settings.
 * @param array $exclude
 *   An array containing 'day', 'month', and/or 'year' if they should be
 *   removed from the format.
 *
 * @return string
 *   A date/time format string.
 */
function webform_date_format($type = NULL, array $exclude = array()) {
  static $formats = array();
  $id = $type . ':' . implode('', $exclude);
  if (!isset($formats[$id])) {
    $type_name = $type ? $type : webform_variable_get('webform_date_type');

    // Format date according to site's given format.
    $format = variable_get('date_format_' . $type_name, 'D, m/d/Y');

    // Date/Time formatting characters
    // WHAT           REQUIRED (at least 1) OPTIONAL (allowed but insufficient)
    // -------------------------------------------------------------------------
    // Day-of-week                          DlNw
    // Day            dj                    Stz
    // Month          FmMn
    // Year           oYy                   L
    //
    //                NOT ALLOWED
    // -------------------------------------------------------------------------
    // Time           aABgGhHisueIOPTZ
    // Special        /.,-: <space>
    //
    // Strip Time and Special characters from the beginning and end of format.
    $date_format = trim($format, 'aABgGhHisueIOPTZ/.,-: ');

    // Ensure that a day, month, and year value are present. Use a default
    // format if all the values are not found. This regular expression uses
    // (?= ), the positive lookahead assertion. It asserts that there are some
    // optional characters (.*) followed by one of the day, month, or year
    // characters. Because it is an assertion, it doesn't consume the
    // characters, so the day, month, and year can be in any order.
    if (!preg_match('/(?=.*[dj])(?=.*[FmMn])(?=.*[oYy])/', $date_format)) {
      $date_format = 'm/d/Y';
    }

    // Remove any excluded portions.
    $strip = array(
      'day' => 'DlNwdjStz',
      'month' => 'FmMn',
      'year' => 'oYyL',
    );
    foreach ($exclude as $field) {
      // Strip the format and any trailing /.,-: or space.
      $date_format = preg_replace('#[' . $strip[$field] . ']+[/\.,\-: ]*#', '', $date_format);
      $date_format = trim($date_format, '/.,-: ');
    }

    $formats[$id] = $date_format;
  }

  return $formats[$id];
}

/**
 * Return a date in the desired format taking into consideration user timezones.
 */
function webform_strtodate($format, $string, $timezone_name = NULL, $reference_timestamp = NULL) {
  global $user;

  // Adjust the time based on the user or site timezone.
  if (variable_get('configurable_timezones', 1) && $timezone_name == 'user' && $user->uid) {
    $timezone_name = isset($GLOBALS['user']->timezone) ? $GLOBALS['user']->timezone : 'UTC';
  }
  // If the timezone is still empty or not set, use the site timezone.
  if (empty($timezone_name) || $timezone_name == 'user') {
    $timezone_name = variable_get('date_default_timezone', 'UTC');
  }

  if (!empty($timezone_name) && class_exists('DateTimeZone')) {
    // Suppress errors if encountered during string conversion. Exceptions are
    // only supported for DateTime in PHP 5.3 and higher.
    try {
      @$timezone = new DateTimeZone($timezone_name);
      if (isset($reference_timestamp)) {
        // A reference for relative dates has been provided.
        // 1. Convert the reference timestamp (in UTC) to a DateTime.
        // 2. Set to time zone to the user or system timezone, recreating the
        //    reference time in the appropriate time zone.
        // 3. Set the time to midnight because when a non-referenced relative
        //    date is created without a time, it is created at midnight (0:00).
        // 4. Adjust to the specified relative (or absolute) time.
        @$datetime = new DateTime('@' . $reference_timestamp);
        @$datetime->setTimezone($timezone)
          ->setTime(0, 0, 0)
          ->modify($string);
      }
      else {
        @$datetime = new DateTime($string, $timezone);
      }
      return @$datetime->format($format);
    }
    catch (Exception $e) {
      return '';
    }
  }
  else {
    return date($format, isset($reference_timestamp) ? strtotime($string, $reference_timestamp) : strtotime($string));
  }
}

/**
 * Get a timestamp in GMT time, ensuring timezone accuracy.
 */
function webform_strtotime($date) {
  $current_tz = date_default_timezone_get();
  date_default_timezone_set('UTC');
  $timestamp = strtotime($date);
  date_default_timezone_set($current_tz);
  return $timestamp;
}

/**
 * Wrapper function for i18n_string() if i18nstrings enabled.
 */
function webform_tt($name, $string, $langcode = NULL, $update = FALSE) {
  if (function_exists('i18n_string')) {
    $options = array(
      'langcode' => $langcode,
      'update' => $update,
    );
    return i18n_string($name, $string, $options);
  }
  else {
    return $string;
  }
}

/**
 * Returns an IP Address or anonymized IP Address for confidential webforms.
 */
function webform_ip_address($node) {
  return $node->webform['confidential'] ? t('(unknown)') : ip_address();
}

/**
 * Implements hook_views_api().
 */
function webform_views_api() {
  return array(
    'api' => 3.0,
    'path' => drupal_get_path('module', 'webform') . '/views',
  );
}

/**
 * Implements hook_views_default_views().
 */
function webform_views_default_views() {
  $path = './' . drupal_get_path('module', 'webform') . '/views/default_views/*.inc';
  $views = array();
  foreach (glob($path) as $views_filename) {
    require_once $views_filename;
  }
  return $views;
}

/**
 * Implements hook_field_extra_fields().
 */
function webform_field_extra_fields() {
  $extra = array();
  foreach (webform_node_types() as $type) {
    $extra['node'][$type]['display']['webform'] = array(
      'label' => t('Webform'),
      'description' => t('Webform client form.'),
      'weight' => 10,
    );
  }
  return $extra;
}

/**
 * Implements hook_date_views_extra_tables().
 */
function webform_date_views_extra_tables() {
  return array('webform_submissions' => 'webform_submissions');
}

/**
 * Returns the next serial number for a given node and increments it.
 *
 * @param int $nid
 *   The nid of the node.
 *
 * @return int
 *   The next value of the serial number.
 */
function _webform_submission_serial_next_value($nid) {
  // Use a transaction with SELECT ... FOR UPDATE to lock the row between
  // the SELECT and the UPDATE, ensuring that multiple Webform submissions
  // at the same time do not have duplicate numbers. FOR UPDATE must be inside
  // a transaction. The return value of db_transaction() must be assigned or the
  // transaction will commit immediately. The transaction will commit when $txn
  // goes out-of-scope.
  $transaction = db_transaction();

  // Get the next_serial value.
  $next_serial = db_select('webform', 'w')
    // Only add FOR UPDATE when incrementing.
    ->forUpdate()
    ->fields('w', array('next_serial'))
    ->condition('nid', $nid)
    ->execute()
    ->fetchField();

  // $next_serial must be greater than any existing serial number.
  $next_serial = max($next_serial, _webform_submission_serial_next_value_used($nid));

  // Increment the next_value.
  db_update('webform')
    ->fields(array('next_serial' => $next_serial + 1))
    ->condition('nid', $nid)
    ->execute();

  return $next_serial;
}

/**
 * Returns the next submission serial number to be used.
 *
 * This is based on the submissions in the database.
 *
 * @param int $nid
 *   The Node ID of the Webform.
 *
 * @return int
 *   The largest serial number used by a submission plus 1 for the specified
 *   node or 1 when there are no submissions.
 */
function _webform_submission_serial_next_value_used($nid) {
  $max_serial = db_select('webform_submissions');
  $max_serial->addExpression('MAX(serial)');
  $max_serial = $max_serial
    ->condition('nid', $nid)
    ->execute()
    ->fetchField();
  // $max_serial will be a numeric string or NULL.
  return $max_serial + 1;
}

/**
 * Alter the node before saving a clone.
 *
 * @param object $node
 *   Reference to the fully loaded node object being saved (the clone) that
 *   can be altered as needed.
 * @param array $context
 *   An array of context describing the clone operation. The keys are:
 *   - 'method' : Can be either 'prepopulate' or 'save-edit'.
 *   - 'original_node' : The original fully loaded node object being cloned.
 *
 * @see clone_node_save()
 * @see drupal_alter()
 */
function webform_clone_node_alter(&$node, array $context) {
  if (isset($node->webform)) {
    $defaults = webform_node_defaults();
    $node->webform['next_serial'] = $defaults['next_serial'];
  }
}

/**
 * Check if the last form submission exceeded the servers max_input_vars limit.
 *
 * Optionally preflight the current form to be returned in this request.
 *
 * @param array $form
 *   Reference to the form, which will be changed if $parent_key is set.
 * @param array $form_state
 *   Form's state or NULL for no form state check.
 * @param string $detect_key
 *   A key that will always be present in the posted data when an actual form
 *   submission has been made.
 * @param string $parent_key
 *   Omit to not preflight the form, or the array key for the parent of where
 *   the preflight warning should be inserted into the form.
 */
function webform_input_vars_check(array &$form, array $form_state, $detect_key, $parent_key = NULL) {
  if (isset($parent_key)) {
    $form['#pre_render'] = array('webform_pre_render_input_vars');
    $form['#input_var_waring_parent'] = $parent_key;
  }
  if (!empty($form_state['input']) && array_key_exists($detect_key, $form_state['input']) && !array_key_exists('form_id', $form_state['input'])) {
    // A form was submitted with POST, but the form_id was missing. The most
    // likely cause of this is that the POST was truncated because PHP exceeded
    // its max_input_vars limit.
    $subs = array(
      '@count' => webform_count_terminals($_POST),
      '@limit' => (int) ini_get('max_input_vars'),
    );
    drupal_set_message(user_access('administer site configuration')
                          ? t('This form could not be submitted because $_POST was truncated to @count input vars.  PHP max_input_vars is @limit and needs to be increased.', $subs)
                          : t('This form could not be submitted because it exceeds the server configuration. Contact the administrator.'),
                      'error');
    watchdog('webform',
      'POST truncated to @count input vars. PHP max_input_vars is @limit. Increase max_input_vars.',
      $subs,
      WATCHDOG_ERROR);
  }
}

/**
 * Checks the number of input form elements on this page.
 *
 * This ensures that the PHP max_input_vars limit is not exceeded.
 *
 * Install this function as a #pre_render function.
 */
function webform_pre_render_input_vars($element) {
  // Determine the limit on input vars for this server configuration.
  $limit = ini_get('max_input_vars');
  if ($limit) {
    // Estimate the number of input vars needed to see if the PHP limit has been
    // exceeded. Additional input_vars: op.
    $count = 1 + webform_count_input_vars($element);
    if ($count > $limit * 0.95) {
      $subs = array(
        '@count' => $count,
        '@limit' => $limit,
      );
      $warning = array(
        '#markup' => '<div class="messages warning">' .
        (user_access('administer site configuration')
          ? t('This form contains @count input elements. PHP max_input_vars is @limit and should be increased.', $subs)
          : t('This form may be too long to work properly. Contact the administrator.'))
        . '</div>',
        '#weight' => -1,
      );
      if ($element['#input_var_waring_parent']) {
        $element[$element['#input_var_waring_parent']]['input_vars_warning'] = $warning;
      }
      else {
        $element['input_vars_warning'] = $warning;
      }
      watchdog('webform',
        'Page contains @count input elements but PHP max_input_vars is only @limit. Increase max_input_vars.',
        $subs,
        WATCHDOG_ERROR);
    }
  }
  return $element;
}

/**
 * Counts the number of input form elements.
 *
 * Note that this is somewhat imprecise. The number of input vars returned in
 * $_POST can vary with the form element. For example, a multiple-select
 * listbox returns one input var for each selection actually made.
 *
 * The primary use for this count is for the conditionals page, where only
 * select, textfield, hidden, and token elements are used. If a more accurate
 * count for webform_client_form is needed, a mechanism to predict the number
 * of input elements for each component type and each component instance would
 * be needed.
 *
 * @param array $element
 *   The form whose elements should be counted.
 *
 * @return int
 *   The number of elements in the form that will result in $_POST entries.
 */
function webform_count_input_vars(array $element) {
  static $input_types = array(
    'checkbox' => 1,
    'date' => 1,
    'file' => 1,
    'managed_file' => 1,
    'password' => 1,
    'password_confirm' => 1,
    'radios' => 1,
    'select' => 1,
    'textfield' => 1,
    'textarea' => 1,
    'token' => 1,
    'weight' => 1,
    'hidden' => 1,
    'value' => 1,
    'webform_email' => 1,
    'webform_number' => 1,
  );
  $children = array_intersect_key($element, array_flip(element_children($element)));
  return $children
    ? array_reduce($children, function ($carry, $item) {
      return $carry + webform_count_input_vars($item);
    }, 0)
    : (isset($element['#type']) && isset($input_types[$element['#type']]) ? $input_types[$element['#type']] : 0);
}

/**
 * Counts terminals in an array.
 *
 * Useful for counting how many input_vars were returned in $_POST.
 *
 * @param $a
 *   Array or array element to be counted
 *
 * @return int
 *   Number of non-array elements within $a.
 */
function webform_count_terminals($a) {
  return is_array($a)
    ? array_reduce($a, function ($carry, $item) {
      return $carry + webform_count_terminals($item);
    }, 0)
    : 1;
}