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<?php
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// $Id: aggregator_node.module,v 1.5 2009/03/29 18:51:30 alexb Exp $
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/**
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* @file
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* Simple node processor implementation. Saves feed items as nodes by
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* implementing the aggregator API.
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*
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* * New feed items are stored as nodes.
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* * Changes in feed items are not updated.
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* * Only URL, GUID and feed association are stored.
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* * Determination of uniqueness of a feed item is very simple - see
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* aggregator_node_unique().
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*/
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/**
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* Implementation of hook_aggregator_process().
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*
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* Save nodes from new feed items.
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*/
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function aggregator_node_aggregator_process($feed) {
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foreach ($feed->items as $item) {
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if (aggregator_node_unique($feed, $item)) {
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aggregator_node_save($feed, $item);
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}
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}
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}
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/**
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* Implementation of hook_aggregator_remove().
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*
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* Delete all nodes when a feed is deleted or when a user removes all feed items.
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*/
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function aggregator_node_aggregator_remove($feed) {
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$result = db_query("SELECT nid FROM {aggregator_node} WHERE fid = :fid", array(':fid' => $feed->nid));
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foreach ($result as $node) {
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node_delete($node->nid);
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}
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db_query('DELETE FROM {aggregator_node} WHERE fid = :fid', array(':fid' => $feed->nid));
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}
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/**
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* Implementation of hook_aggregator_process_info().
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*/
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function aggregator_node_aggregator_process_info() {
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return array('title' => t('Node processor'), 'description' => t('Creates nodes from feed items.'));
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}
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/**
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* Implementation of hook_form_node_type_form_alter().
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*/
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function aggregator_node_form_node_type_form_alter(&$form) {
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$node_type = empty($form['#node_type']->type) ? '' : $form['#node_type']->type;
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$form['aggregator']['modules']['aggregator_node'] = array(
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'#type' => 'fieldset',
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'#title' => t('Node processor settings'),
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'#collapsible' => TRUE,
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'#collapsed' => !in_array('aggregator_node', variable_get('aggregator_processors_' . $node_type, array('aggregator'))),
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);
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$node_types = node_get_types('names');
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$form['aggregator']['modules']['aggregator_node']['aggregator_node_type'] = array(
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'#type' => 'select',
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'#title' => t('Content type of feed items') ,
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'#default_value' => variable_get('aggregator_node_type_' . $node_type, key($node_types)),
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'#options' => $node_types,
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'#description' => t('Choose the content type that should be used when creating nodes from feed items.'),
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);
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}
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/**
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* Determines wether the given $item is unique or not.
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*
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* Simple implementation that prevents entries with the same URL or GUID.
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*/
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function aggregator_node_unique($feed, $item) {
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if (!empty($item['GUID'])) {
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$entry = db_query("SELECT nid FROM {aggregator_node} WHERE fid = :fid AND guid = :guid", array(':fid' => $feed->nid, ':guid' => $item['GUID']))->fetchObject();
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}
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elseif ($item['LINK'] && $item['LINK'] != $feed->link && $item['LINK'] != $feed->url) {
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$entry = db_query("SELECT nid FROM {aggregator_node} WHERE fid = :fid AND link = :link", array(':fid' => $feed->nid, ':link' => $item['LINK']))->fetchObject();
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}
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if (empty($entry->nid)) {
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return TRUE;
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}
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return FALSE;
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}
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/**
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* Takes an aggregator style feed item and saves it as a node.
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*/
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function aggregator_node_save($feed, $item) {
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if ($item['TITLE']) {
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// Create a new node object.
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$node = new stdClass();
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$node->title = $item['TITLE'];
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$node->body = $item['DESCRIPTION'];
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$node->teaser = $node->body;
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$node->created = $item['TIMESTAMP'];
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$node->type = variable_get('aggregator_node_type_' .$feed->type, 'article');
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$node_options = variable_get('node_options_' . $node->type, array('status', 'promote'));
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$node->promote = in_array('promote', $node_options) ? 1 : 0;
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// Save it.
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node_save($node);
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// Now save a record to the aggregator node table to store meta information.
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if (!empty($node->nid)) {
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db_insert('aggregator_node')
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->fields(array(
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'nid' => $node->nid,
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'fid' => $feed->nid,
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'link' => $item['LINK'],
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'guid' => $item['GUID'],
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))
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->execute();
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}
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}
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}
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