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<?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();
}
}
}
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