Club Drupal

<?php

/**

 * @file

 * Processor functions for the aggregator module.

 */

/**

 * Implements hook_aggregator_process_info().

 */

function aggregator_aggregator_process_info() {

  return array(

    'title' => t('Default processor'),

    'description' => t('Creates lightweight records from feed items.'),

  );

}

/**

 * Implements hook_aggregator_process().

 */

function aggregator_aggregator_process($feed) {

  if (is_object($feed)) {

    if (is_array($feed->items)) {

      foreach ($feed->items as $item) {

        // Save this item. Try to avoid duplicate entries as much as possible. If

        // we find a duplicate entry, we resolve it and pass along its ID is such

        // that we can update it if needed.

        if (!empty($item['guid'])) {

          $entry = db_query("SELECT iid, timestamp FROM {aggregator_item} WHERE fid = :fid AND guid = :guid", array(':fid' => $feed->fid, ':guid' => $item['guid']))->fetchObject();

        }

        elseif ($item['link'] && $item['link'] != $feed->link && $item['link'] != $feed->url) {

          $entry = db_query("SELECT iid, timestamp FROM {aggregator_item} WHERE fid = :fid AND link = :link", array(':fid' => $feed->fid, ':link' => $item['link']))->fetchObject();

        }

        else {

          $entry = db_query("SELECT iid, timestamp FROM {aggregator_item} WHERE fid = :fid AND title = :title", array(':fid' => $feed->fid, ':title' => $item['title']))->fetchObject();

        }

        if (!$item['timestamp']) {

          $item['timestamp'] = isset($entry->timestamp) ? $entry->timestamp : REQUEST_TIME;

        }

        // Make sure the item title and author fit in the 255 varchar column.

        $item['title'] = truncate_utf8($item['title'], 255, TRUE, TRUE);

        $item['author'] = truncate_utf8($item['author'], 255, TRUE, TRUE);

        aggregator_save_item(array('iid' => (isset($entry->iid) ? $entry->iid : ''), 'fid' => $feed->fid, 'timestamp' => $item['timestamp'], 'title' => $item['title'], 'link' => $item['link'], 'author' => $item['author'], 'description' => $item['description'], 'guid' => $item['guid']));

      }

    }

  }

}

/**

 * Implements hook_aggregator_remove().

 */

function aggregator_aggregator_remove($feed) {

  $iids = db_query('SELECT iid FROM {aggregator_item} WHERE fid = :fid', array(':fid' => $feed->fid))->fetchCol();

  if ($iids) {

    db_delete('aggregator_category_item')

      ->condition('iid', $iids, 'IN')

      ->execute();

  }

  db_delete('aggregator_item')

    ->condition('fid', $feed->fid)

    ->execute();

  drupal_set_message(t('The news items from %site have been removed.', array('%site' => $feed->title)));

}

/**

 * Implements hook_form_aggregator_admin_form_alter().

 *

 * Form alter aggregator module's own form to keep processor functionality

 * separate from aggregator API functionality.

 */

function aggregator_form_aggregator_admin_form_alter(&$form, $form_state) {

  if (in_array('aggregator', variable_get('aggregator_processors', array('aggregator')))) {

    $info = module_invoke('aggregator', 'aggregator_process', 'info');

    $items = drupal_map_assoc(array(3, 5, 10, 15, 20, 25), '_aggregator_items');

    $period = drupal_map_assoc(array(3600, 10800, 21600, 32400, 43200, 86400, 172800, 259200, 604800, 1209600, 2419200, 4838400, 9676800), 'format_interval');

    $period[AGGREGATOR_CLEAR_NEVER] = t('Never');

    // Only wrap into a collapsible fieldset if there is a basic configuration.

    if (isset($form['basic_conf'])) {

      $form['modules']['aggregator'] = array(

        '#type' => 'fieldset',

        '#title' => t('Default processor settings'),

        '#description' => $info['description'],

        '#collapsible' => TRUE,

        '#collapsed' => !in_array('aggregator', variable_get('aggregator_processors', array('aggregator'))),

      );

    }

    else {

      $form['modules']['aggregator'] = array();

    }

    $form['modules']['aggregator']['aggregator_summary_items'] = array(

      '#type' => 'select',

      '#title' => t('Number of items shown in listing pages'),

      '#default_value' => variable_get('aggregator_summary_items', 3),

      '#empty_value' => 0,

      '#options' => $items,

    );

    $form['modules']['aggregator']['aggregator_clear'] = array(

      '#type' => 'select',

      '#title' => t('Discard items older than'),

      '#default_value' => variable_get('aggregator_clear', 9676800),

      '#options' => $period,

      '#description' => t('Requires a correctly configured <a href="@cron">cron maintenance task</a>.', array('@cron' => url('admin/reports/status'))),

    );

    $form['modules']['aggregator']['aggregator_category_selector'] = array(

      '#type' => 'radios',

      '#title' => t('Select categories using'),

      '#default_value' => variable_get('aggregator_category_selector', 'checkboxes'),

      '#options' => array('checkboxes' => t('checkboxes'),

      'select' => t('multiple selector')),

      '#description' => t('For a small number of categories, checkboxes are easier to use, while a multiple selector works well with large numbers of categories.'),

    );

    $form['modules']['aggregator']['aggregator_teaser_length'] = array(

      '#type' => 'select',

      '#title' => t('Length of trimmed description'),

      '#default_value' => variable_get('aggregator_teaser_length', 600),

      '#options' => drupal_map_assoc(array(0, 200, 400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2000), '_aggregator_characters'),

      '#description' => t("The maximum number of characters used in the trimmed version of content.")

    );

  }

}

/**

 * Creates display text for teaser length option values.

 *

 * Callback for drupal_map_assoc() within

 * aggregator_form_aggregator_admin_form_alter().

 *

 * @param $length

 *   The desired length of teaser text, in bytes.

 *

 * @return

 *   A translated string explaining the teaser string length.

 */

function _aggregator_characters($length) {

  return ($length == 0) ? t('Unlimited') : format_plural($length, '1 character', '@count characters');

}

/**

 * Adds/edits/deletes an aggregator item.

 *

 * @param $edit

 *   An associative array describing the item to be added/edited/deleted.

 */

function aggregator_save_item($edit) {

  if ($edit['title'] && empty($edit['iid'])) {

    $edit['iid'] = db_insert('aggregator_item')

      ->fields(array(

        'title' => $edit['title'],

        'link' => $edit['link'],

        'author' => $edit['author'],

        'description' => $edit['description'],

        'guid' => $edit['guid'],

        'timestamp' => $edit['timestamp'],

        'fid' => $edit['fid'],

      ))

      ->execute();

  }

  if ($edit['iid'] && !$edit['title']) {

    db_delete('aggregator_item')

      ->condition('iid', $edit['iid'])

      ->execute();

    db_delete('aggregator_category_item')

      ->condition('iid', $edit['iid'])

      ->execute();

  }

  elseif ($edit['title'] && $edit['link']) {

    // file the items in the categories indicated by the feed

    $result = db_query('SELECT cid FROM {aggregator_category_feed} WHERE fid = :fid', array(':fid' => $edit['fid']));

    foreach ($result as $category) {

      db_merge('aggregator_category_item')

        ->key(array(

          'iid' => $edit['iid'],

          'cid' => $category->cid,

        ))

        ->execute();

    }

  }

}

/**

 * Expires items from a feed depending on expiration settings.

 *

 * @param $feed

 *   Object describing feed.

 */

function aggregator_expire($feed) {

  $aggregator_clear = variable_get('aggregator_clear', 9676800);

  if ($aggregator_clear != AGGREGATOR_CLEAR_NEVER) {

    // Remove all items that are older than flush item timer.

    $age = REQUEST_TIME - $aggregator_clear;

    $iids = db_query('SELECT iid FROM {aggregator_item} WHERE fid = :fid AND timestamp < :timestamp', array(

      ':fid' => $feed->fid,

      ':timestamp' => $age,

    ))

    ->fetchCol();

    if ($iids) {

      db_delete('aggregator_category_item')

        ->condition('iid', $iids, 'IN')

        ->execute();

      db_delete('aggregator_item')

        ->condition('iid', $iids, 'IN')

        ->execute();

    }

  }

}