function node_feed in Drupal 4

Same name and namespace in other branches

1. 5 modules/node/node.module \node_feed()
2. 6 modules/node/node.module \node_feed()
3. 7 modules/node/node.module \node_feed()

A generic function for generating RSS feeds from a set of nodes.

Parameters

$nodes: An object as returned by db_query() which contains the nid field.

$channel: An associative array containing title, link, description and other keys. The link should be an absolute URL.

3 calls to node_feed()

blog_feed_last in modules/blog.module

Displays an RSS feed containing recent blog entries of all users.

blog_feed_user in modules/blog.module

Displays an RSS feed containing recent blog entries of a given user.

taxonomy_term_page in modules/taxonomy.module

Menu callback; displays all nodes associated with a term.

1 string reference to 'node_feed'

node_menu in modules/node.module

Implementation of hook_menu().

File

modules/node.module, line 1458

The core that allows content to be submitted to the site.

Code

function node_feed($nodes = 0, $channel = array()) {
  global $base_url, $locale;
  if (!$nodes) {
    $nodes = db_query_range(db_rewrite_sql('SELECT n.nid, n.created FROM {node} n WHERE n.promote = 1 AND n.status = 1 ORDER BY n.created DESC'), 0, variable_get('feed_default_items', 10));
  }
  $item_length = variable_get('feed_item_length', 'teaser');
  $namespaces = array(
    'xmlns:dc="http://purl.org/dc/elements/1.1/"',
  );
  while ($node = db_fetch_object($nodes)) {

    // Load the specified node:
    $item = node_load($node->nid);
    $link = url("node/{$node->nid}", NULL, NULL, 1);
    if ($item_length != 'title') {
      $teaser = $item_length == 'teaser' ? TRUE : FALSE;

      // Filter and prepare node teaser
      if (node_hook($item, 'view')) {
        node_invoke($item, 'view', $teaser, FALSE);
      }
      else {
        $item = node_prepare($item, $teaser);
      }

      // Allow modules to change $node->teaser before viewing.
      node_invoke_nodeapi($item, 'view', $teaser, FALSE);
    }

    // Allow modules to add additional item fields
    $extra = node_invoke_nodeapi($item, 'rss item');
    $extra = array_merge($extra, array(
      array(
        'key' => 'pubDate',
        'value' => date('r', $item->created),
      ),
      array(
        'key' => 'dc:creator',
        'value' => $item->name,
      ),
      array(
        'key' => 'guid',
        'value' => $item->nid . ' at ' . $base_url,
        'attributes' => array(
          'isPermaLink' => 'false',
        ),
      ),
    ));
    foreach ($extra as $element) {
      if ($element['namespace']) {
        $namespaces = array_merge($namespaces, $element['namespace']);
      }
    }

    // Prepare the item description
    switch ($item_length) {
      case 'fulltext':
        $item_text = $item->body;
        break;
      case 'teaser':
        $item_text = $item->teaser;
        if ($item->readmore) {
          $item_text .= '<p>' . l(t('read more'), 'node/' . $item->nid, NULL, NULL, NULL, TRUE) . '</p>';
        }
        break;
      case 'title':
        $item_text = '';
        break;
    }
    $items .= format_rss_item($item->title, $link, $item_text, $extra);
  }
  $channel_defaults = array(
    'version' => '2.0',
    'title' => variable_get('site_name', 'drupal') . ' - ' . variable_get('site_slogan', ''),
    'link' => $base_url,
    'description' => variable_get('site_mission', ''),
    'language' => $locale,
  );
  $channel = array_merge($channel_defaults, $channel);
  $output = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n";
  $output .= "<rss version=\"" . $channel["version"] . "\" xml:base=\"" . $base_url . "\" " . implode(' ', $namespaces) . ">\n";
  $output .= format_rss_channel($channel['title'], $channel['link'], $channel['description'], $items, $channel['language']);
  $output .= "</rss>\n";
  drupal_set_header('Content-Type: application/rss+xml; charset=utf-8');
  print $output;
}