ding_kultunaut_feed.module

<?php

/**
 * @file
 * Code for the Ding Kultunaut Feed feature.
 */

include_once 'ding_kultunaut_feed.features.inc';

/**
 * Implements hook_views_post_render().
 *
 * The Kultunaut feed requires an attribute on each <activity> tag. The
 * attribute is expected to contain the word "1-dags" if the event is an one day
 * event and the string "flerdags" if the event spans several days.
 *
 * The views_data_export module doesn't support attributes. The date field
 * doesn't support telling us if an event spans several days or not.
 *
 * So we add a "pseudo" field to the feed and post process it with regular
 * expressions (sic!).
 *
 * The "pseudo" field should look like this (startdate!enddate):
 *
 *   <ding_kultunaut_feed_duration>2014-07-25 13:37:00!2014-07-25 15:37:00</ding_kultunaut_feed_duration>
 *
 * @see http://xkcd.com/1171/
 */
function ding_kultunaut_feed_views_post_render(&$view, &$output, &$cache) {
  // Find ding_kultunaut_feed_duration tags where startdate and enddate are
  // identical.
  $output = preg_replace('/\<activity\>[^<]*\<ding_kultunaut_feed_duration\>(\d{4}-\d{2}-\d{2})[^!]*!\1[^<]*\<\/ding_kultunaut_feed_duration\>/si', '<activity type="1-dags">', $output);

  // The left over ding_kultunaut_feed_duration tags most be spanning several
  // days.
  $output = preg_replace('/\<activity\>[^<]*\<ding_kultunaut_feed_duration\>(\d{4}-\d{2}-\d{2})[^!]*!(\d{4}-\d{2}-\d{2})[^<]*\<\/ding_kultunaut_feed_duration\>/si', '<activity type="flerdages">', $output);
}

/**
 * Implements hook_date_formats().
 */
function ding_kultunaut_feed_date_formats() {
  return array(
    array(
      'type' => 'ding_kultunaut_feed_format',
      'format' => 'Y/m/d H:i:\\0\\0 T',
      'locales' => array(),
    ),
  );
}

/**
 * Implements hook_date_format_types().
 */
function ding_kultunaut_feed_date_format_types() {
  return array(
    'ding_kultunaut_feed_format' => t('Kultunaut feed format'),
  );
}