popsu-d7/sites/all/modules/calendar/calendar_ical/calendar_ical.module

<?php

/**
 * Implementation of hook_views_api().
 *
 * This one is used as the base to reduce errors when updating.
 */
function calendar_ical_views_api() {
  return array(
    'api' => 2,
    'path' => drupal_get_path('module', 'calendar_ical'),
  );
}

/**
 * @file
 * Adds ical functionality to Calendar.
 */
function calendar_ical_theme() {
  return array(
    'calendar_ical_icon' => array(
      'variables' => array('url'),
      ),
    );
}

function theme_calendar_ical_icon($vars) {
  $url = $vars['url'];
  $variables = array(
    'path' => drupal_get_path('module', 'date_api') . '/images/ical16x16.gif',
    'title' => t('Add to calendar'), t('Add to calendar'),
  );
  if ($image = theme('image', $variables)) {
    return '<div style="text-align:right"><a href="' . check_url($url) . '" class="ical-icon" title="ical">' . $image . '</a></div>';
  }
}

/**
 * Implements hook_entity_info_alter().
 *
 * Add an 'iCal' view mode for nodes, similar to RSS view mode.
 */
function calendar_ical_entity_info_alter(&$info) {
  $info['node']['view modes'] += array(
    'ical' => array(
      'label' => t('iCal'),
      'custom settings' => FALSE,
    ),
  );
}

/**
 * Implementation of hook_views_plugins
 */
function calendar_ical_views_plugins() {
  $module_path = drupal_get_path('module', 'calendar_ical');
  module_load_include('inc', 'calendar_ical', 'theme.inc');

  $data = array(
    'module' => 'calendar_ical', // This just tells our themes are elsewhere.
    'style' => array(
      'ical' => array(
        'title' => t('DEPRECATED iCal Feed'),
        'help' => t('Generates an iCal VCALENDAR feed from a view.'),
        'handler' => 'calendar_plugin_style_ical',
        'path' => "$module_path",
        'theme' => 'calendar_style_ical',
        'theme file' => 'theme.inc',
        'theme path' => "$module_path",
        'uses fields' => TRUE,
        'uses grouping' => FALSE,
        'uses row plugin' => TRUE,
        'uses options' => TRUE,
        'type' => 'feed',
        'even empty' => TRUE,
      ),
    ),
    'row' => array(
      'ical_node' => array(
        'title' => t('DEPRECATED iCal Fields'),
        'help' => t('Display each node as an iCal VEVENT item.'),
        'handler' => 'calendar_plugin_row_ical_node',
        'path' => "$module_path",
        'theme' => 'calendar_row_ical_node',
        'theme file' => 'theme.inc',
        'theme path' => "$module_path",
        'base' => array('node'), // only works with 'node' as base.
        'uses options' => TRUE,
        'uses fields' => FALSE,
        'type' => 'feed',
      ),
    ),
  );
  return $data;
}