<?php

/**
 * @file
 * Ubercart Terms of Service.
 */

// Include the conditional actions for displaying the panes.
// TODO: need to port to Drupal 7 with Rules integration
// require_once('uc_termsofservice.ca.inc');

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

  $items['uc_termsofservice/node/autocomplete'] = array(
    'title'           => 'Autocomplete of nodes',
    'page callback'   => 'uc_termsofservice_node_autocomplete',
    'access callback' => TRUE,
    'type'            => MENU_CALLBACK,
  );

  // modalframe callback items
  if (module_exists('modalframe')) {
    $items['uc_termsofservice/show/%node'] = array(
      'title'           => 'Show Terms of Service',
      'title callback'  => 'uc_termsofservice_title_callback',
      'title arguments' => array(2),
      'page callback'   => 'drupal_get_form',
      'page arguments'  => array('uc_termsofservice_general_form'),
      'access callback' => TRUE,
      'type'            => MENU_CALLBACK,
//      'file'            => 'uc_termsofservice.admin.inc',
    );
  }

  return $items;
}

/**
 * Implements hook_theme().
 */
function uc_termsofservice_theme() {
  return array(
    'uc_termsofservice_agreement_form' => array(
      'variables' => array(
        'form' => NULL
      ),
      'template'  => 'uc_termsofservice_agreement_form',
    ),
  );
}

/**
 * Ubercart hooks.
 */

/**
 * Implements hook_uc_cart_pane().
 */
function uc_termsofservice_uc_cart_pane($items) {
  $node = uc_termsofservice_get_node('cart');
  $title = t('Terms of Service');
  if (isset($node->title)) {
    $title = $node->title;
  }
  $panes[] = array(
    'id' => 'uc_termsofservice_agreement_cart',
    'title' => t('@title', array('@title' => $title)),
    'desc' => t("Please confirm if you agree with our terms and conditions that apply on all our purchases."),
    'weight' => 6,
    'body' => !is_null($items) ? drupal_get_form('uc_termsofservice_agreement_cart_callback', $items) : '',
  );
  return $panes;
}

/**
 * Implements hook_uc_checkout_pane().
 */
function uc_termsofservice_uc_checkout_pane() {
  $node = uc_termsofservice_get_node('checkout');
  $title = t('Terms of Service');
  if (isset($node->title)) {
    $title = $node->title;
  }
  $panes[] = array(
    'id' => 'uc_termsofservice_agreement_checkout',
    'callback' => 'uc_termsofservice_checkout_pane_callback',
    'title' => t('@title', array('@title' => $title)),
    'desc' => t("Please confirm if you agree with our terms and conditions that apply on all our purchases."),
    'weight' => 6,
    'collapsible' => TRUE,
  );
  return $panes;
}

/**
 * Callback form for cart pane.
 */
function uc_termsofservice_agreement_cart_callback($items) {
  if (module_exists('modalframe') && variable_get('uc_termsofservice_cart_popup', 0)) {
    // If the modalframe module is enabled and the config for popups is
    // then the ToS is shown in a popup.
    modalframe_parent_js();
    drupal_add_js(drupal_get_path('module', 'uc_termsofservice') . '/uc_termsofservice.js');
    $node = uc_termsofservice_get_node('cart');
    $width = variable_get('uc_termsofservice_cart_popup_width', 500);
    $height = variable_get('uc_termsofservice_cart_popup_height', 300);
    $form = uc_termsofservice_get_item('cart', $node->title, 'uc_termsofservice/show/' . $node->nid, "$width,$height");
  }
  else {
    $form = uc_termsofservice_general_form(array(), 'cart');
  }
  return $form;
}

/**
 * General form for both checkout & cart modes.
 *
 * @see uc_termsofservice_general_form_submit()
 */
function uc_termsofservice_general_form($form_state, $type = NULL) {
  $form = array();
  if (!$type) {
    $type = arg(2);
  }
  $node = uc_termsofservice_get_node($type);
  if ($node) {
    $display_mode = variable_get('uc_termsofservice_' . $type . '_display', 'teaser');
    $display_title = variable_get('uc_termsofservice_' . $type . '_title', TRUE);

    if (! $display_title) {
      $node->title = '';
    }

    $view = node_view($node, $display_mode);
    $form['tos_text'] = array(
      '#markup' => drupal_render($view),
    );
    $form['tos_agree'] = array(
      '#type' => 'checkboxes',
      '#options' => array('agreed' => t('I agree with the terms above')),
    );

    //$form['#theme'] = 'uc_termsofservice_agreement_form';

    if (module_exists('modalframe') && variable_get('uc_termsofservice_' . $type . '_popup', 0)) {
      // Send the Modal Frame javascript for child windows to the page.
      modalframe_child_js();
      $form['submit'] = array(
        '#type' => 'submit',
        '#value' => t('Submit'),
      );
      $form['tos_agree']['#attributes'] = array('onclick' => 'this.form.submit();');
    }
    return $form;
  }
  return;
}

/**
 * Submit handler for uc_termsofservice_general_form().
 *
 * @see uc_termsofservice_general_form()
 */
function uc_termsofservice_general_form_submit($form, &$form_state) {
  modalframe_close_dialog(array('tos_selected' => $form_state['values']['tos_agree']));
}

/**
 * Callback form for checkout pane.
 */
function uc_termsofservice_checkout_pane_callback($op) {
  switch ($op) {
    case 'view':
      if (module_exists('modalframe') && variable_get('uc_termsofservice_checkout_popup', 0)) {
        // If the modalframe module is enabled and the config for popups is
        // then the ToS is shown in a popup.
        modalframe_parent_js();
        drupal_add_js(drupal_get_path('module', 'uc_termsofservice') . '/uc_termsofservice.js');
        $node = uc_termsofservice_get_node('checkout');
        $width = variable_get('uc_termsofservice_checkout_popup_width', 500);
        $height = variable_get('uc_termsofservice_checkout_popup_height', 300);
        $form = uc_termsofservice_get_item('checkout', $node->title, 'uc_termsofservice/show/' . $node->nid, "$width,$height");
      }
      else {
        $form = uc_termsofservice_general_form(array(), 'checkout');
      }
      return array('contents' => $form);
    case 'settings':
      $form = uc_termsofservice_admin_form('checkout');
      return $form;
      break;
  }
}

/**
 * Function that filters the node nid from the autocomplete string.
 */
function uc_termsofservice_get_nid_from_variable($type = NULL) {
  $nid = 0;

  $tos_node = variable_get('uc_termsofservice_' . $type . '_node', $nid);
  $preg_matches = array();
  $match = preg_match('/\[nid: (\d+)\]/', $tos_node, $preg_matches);
  if ($match) {
    $nid = $preg_matches[1];
  }

  return $nid;
}

/**
 * Retrieves the ToS node from database.
 */
function uc_termsofservice_get_node($type = NULL, $nid = NULL) {
  if (!$nid) {
    $nid = uc_termsofservice_get_nid_from_variable($type);
  }
  if ($nid) {
    if (module_exists('translation')) {
      global $language;
      $translations = translation_node_get_translations($nid);
      if (isset($translations[$language->language])) {
        $nid = $translations[$language->language]->nid;
      }
    }
    $node = node_load($nid);
    return $node;
  }
  return;
}

/**
 * Helper function for ModalFrame to build links to popup page.
 */
function uc_termsofservice_get_item($type = NULL, $title, $path, $size = NULL) {
  $options = array('attributes' => array('class' => 'uc_termsofservice-child' . (!empty($size) ? ' uc_termsofservice-size[' . $size . ']' : '')));
  $form['tos_agree_popup'] = array(
    '#type' => 'checkboxes',
    '#options' => array('agreed' => t('I agree with the !tos', array('!tos' => l($title, $path . '/' . $type, $options)))),
  );
  return $form;
}

/**
 * Settings form for checkout & cart panes.
 */
function uc_termsofservice_admin_form($type = NULL) {
  if ($type) {
    $form = array();

    // Required option only for checkout by the moment.
    if ($type == 'checkout') {
      $form['uc_termsofservice_' . $type . '_required'] = array(
        '#type' => 'checkbox',
        '#title' => t('ToS agreement is required'),
        '#default_value' => variable_get('uc_termsofservice_' . $type . '_required', 0),
        '#weight' => 1,
      );
    }

    // Autocomplete textfield for selecting the ToS node.
    $form['uc_termsofservice_' . $type . '_node'] = array(
      '#type' => 'textfield',
      '#title' => t('Select the node that corresponds to the Terms of Service. Note that this node will be shown regardless of node access permissions.'),
      '#autocomplete_path' => 'uc_termsofservice/node/autocomplete',
      '#default_value' => variable_get('uc_termsofservice_' . $type . '_node', NULL),
      '#weight' => 0,
    );

    // Hide node title
    $form['uc_termsofservice_' . $type . '_title'] = array(
      '#type' => 'select',
      '#title' => t('Show the node title?'),
      '#description' => t('Showing the node title will render it as a link.'),
      '#options' => array(1 => t('Yes'), 0 => t('No')),
      '#default_value' => variable_get('uc_termsofservice_' . $type . '_title', 1),
    );

    // ToS node display mode
    $entity_info = entity_get_info();
    $display_types = array();

    foreach ($entity_info['node']['view modes'] as $key => $val) {
      $display_types[$key] = $val['label'];
    }

    $form['uc_termsofservice_' . $type . '_display'] = array(
      '#type' => 'select',
      '#title' => t('Node display'),
      '#description' => t('Display type to use to display the node (usually Teaser or Full content).'),
      '#options' => $display_types,
      '#default_value' => variable_get('uc_termsofservice_' . $type . '_display', 'teaser'),
    );

    // Handle ToS in a popup window.
    if (module_exists('modalframe')) {
      // Container for advanced settings.
      $form['uc_termsofservice_advanced_settings'] = array(
        '#type' => 'fieldset',
        '#title' => t('Advanced settings'),
        '#weight' => 2,
        '#collapsible' => TRUE,
        '#collapsed' => FALSE,
      );

      $form['uc_termsofservice_advanced_settings']['uc_termsofservice_' . $type . '_popup'] = array(
        '#type' => 'checkbox',
        '#title' => t('Open ToS in a popup modal window.'),
        '#default_value' => variable_get('uc_termsofservice_' . $type . '_popup', 0),
      );
      $form['uc_termsofservice_advanced_settings']['uc_termsofservice_' . $type . '_popup_width'] = array(
        '#type' => 'textfield',
        '#title' => t('Width of the popup window'),
        '#default_value' => variable_get('uc_termsofservice_' . $type . '_popup_width', NULL),
        '#size' => 4,
      );
      $form['uc_termsofservice_advanced_settings']['uc_termsofservice_' . $type . '_popup_height'] = array(
        '#type' => 'textfield',
        '#title' => t('Height of the popup window'),
        '#default_value' => variable_get('uc_termsofservice_' . $type . '_popup_height', NULL),
        '#size' => 4,
      );
    }

    return $form;
  }
}

/**
 * Implements hook_form_FORM_ID_alter() for uc_cart_cart_panes_form.
 */
function uc_termsofservice_form_uc_cart_cart_panes_form_alter(&$form, &$form_state) {
  $form['uc_termsofservice'] = array(
    '#type'        => 'fieldset',
    '#title'       => t('Terms of Service settings'),
    '#weight'      => 98,
    '#collapsible' => TRUE,
    '#collapsed'   => FALSE,
  );
  $form['uc_termsofservice'] += uc_termsofservice_admin_form('cart');
  $form['buttons']['#weight'] = 99;
}

/**
 * Implements hook_form_FORM_ID_alter() for uc_cart_checkout_form.
 *
 * Adds validation function to check required agreement.
 */
function uc_termsofservice_form_uc_cart_checkout_form_alter(&$form, $form_state) {
  $form['#validate'][] = 'uc_termsofservice_checkout_form_validate';
}

/**
 * Validate function for checkout, if required by our configuration.
 *
 * This way, we can display a better 'required' message than the default
 * Form API message for a required element.
 */
function uc_termsofservice_checkout_form_validate($form, &$form_state) {
  // Only check for validation when the pane really exists.
  if (isset($form_state['values']['panes']['uc_termsofservice_agreement_checkout'])) {
    $required = variable_get('uc_termsofservice_checkout_required', 0);
    if ($required) {
      $popup = variable_get('uc_termsofservice_checkout_popup', 0);
      if (!$popup) {
        $agreed = $form_state['values']['panes']['uc_termsofservice_agreement_checkout']['tos_agree']['agreed'];
      }
      else {
        $agreed = $form_state['values']['panes']['uc_termsofservice_agreement_checkout']['tos_agree_popup']['agreed'];
      }
      if (!$agreed) {
        $node = uc_termsofservice_get_node('checkout');

        form_set_error('panes][uc_termsofservice_agreement_checkout][tos_agree', t("In order to continue with the checkout process you must first accept the !tos", array('!tos' => $node->title)));
      }
    }
  }
}

/**
 * Autocomplete callback, taken from panels module.
 */
function uc_termsofservice_node_autocomplete($string) {
  // If there are node_types passed, we'll use those in a MySQL IN query.
  if ($string != '') {
    $query = db_select('node', 'n')
      ->fields('n', array('nid', 'title'))
      ->addTag('node_access');
    $query->join('users', 'u', 'u.uid = n.uid');
    $query->fields('u', array('name'));

    // Build query conditions.
    $preg_matches = array();
    $match = preg_match('/\[nid: (\d+)\]/', $string, $preg_matches);
    if (!$match) {
      $match = preg_match('/^nid: (\d+)/', $string, $preg_matches);
    }
    if ($match) {
      $query->condition('n.nid', $preg_matches[1]);
    }
    else {
      $query->condition('n.title', '%' . db_like($string) . '%', 'LIKE');
    }
    if (!user_access('administer nodes')) {
      $query->condition('n.status', 1);
    }

    // Execute the query.
    $result = $query->execute();

    $matches = array();
    foreach ($result as $node) {
      $name = empty($node->name) ? variable_get('anonymous', t('Anonymous')) : check_plain($node->name);
      $matches[$node->title . " [nid: $node->nid]"] = '<span class="autocomplete_title">' . check_plain($node->title) . '</span> <span class="autocomplete_user">(' . t('by @user', array('@user' => $name)) . ')</span>';
    }

    // Return the results to the form in json.
    drupal_json_output($matches);
  }
}

/**
 * Menu title callback.
 */
function uc_termsofservice_title_callback($node = NULL) {
  $title = t('Terms of Service');
  if ($node->title) {
    $title = $node->title;
  }
  return t('@title', array('@title' => $title));
}