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<?php
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// $Id: trackback.module,v 1.74 2007/11/05 19:50:30 zorac Exp $
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define('TRACKBACK_PATH', './'. drupal_get_path('module', 'trackback'));
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define('TRACKBACK_WITH_SPAM', module_exists('spam'));
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if (TRACKBACK_WITH_SPAM) {
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include_once TRACKBACK_PATH .'/trackback.spam.inc';
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}
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/**
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* Implementation of hook_help().
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*/
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function trackback_help($path, $arg) {
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if ($path == 'admin/help#trackback') {
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include_once TRACKBACK_PATH .'/trackback.admin.inc';
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return _trackback_help($path, $arg);
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}
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}
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/**
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* Implementation of hook_theme()
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*/
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function trackback_theme() {
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return array(
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'trackback' => array(
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'arguments' => array('trackback' => NULL, 'links' => array())
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),
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'trackbacks' => array(
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'arguments' => array('trackbacks' => NULL)
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),
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'trackback_url' => array(
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'arguments' => array('url' => NULL)
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),
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'trackback_admin_table' => array(
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'arguments' => array('form' => NULL)
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)
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);
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}
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function theme_trackback($trackback, $links = array()) {
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$output = '<div class="trackback" id="trackback-'. $trackback->trid .'">'."\n";
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$output .= '<h3 class="title">'. l($trackback->subject, $trackback->url) .'</h3>'."\n";
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$output .= '<span class="submitted">'. t('from %sitename on @date', array('%sitename' => $trackback->name, '@date' => format_date($trackback->created))) .'</span>'."\n";
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$output .= '<div class="content">'. check_markup($trackback->excerpt) .'</div>'."\n";
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if ($links) {
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$output .= '<div class="links">'. theme('links', $links) .'</div>'."\n";
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}
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$output .= '</div>'."\n";
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return $output;
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}
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function theme_trackbacks($trackbacks) {
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$output = '<div id="trackbacks">'."\n";
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$output .= $trackbacks ."\n";
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$output .= '</div>'."\n";
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return $output;
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}
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function theme_trackback_url($url) {
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return '<div id="trackback-url">'. theme('box', t('Trackback URL for this post:'), $url) .'</div>';
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}
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/**
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* Invoke a hook_trackback() operation in all modules.
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*
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* @param &$trackback
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* A trackback object.
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* @param $op
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* A string containing the name of the trackback operation.
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* @return
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* The returned value of the invoked hooks.
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*/
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function trackback_invoke_trackback(&$trackback, $op) {
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$return = array();
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foreach (module_implements('trackback') as $name) {
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$function = $name .'_trackback';
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$result = $function($trackback, $op);
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if (isset($result)) {
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if (is_array($result)) {
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$return = array_merge($return, $result);
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}
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else {
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$return[] = $result;
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}
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}
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}
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return $return;
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}
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function trackback_render($node) {
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$result = db_query('SELECT * FROM {trackback_received} WHERE nid=%d AND status=1 ORDER BY created DESC', $node->nid);
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if ($tb = db_fetch_object($result)) {
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$link = (user_access('administer trackbacks') || node_access('update', $node));
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$received = '';
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do {
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$received .= theme('trackback', $tb, $link ? module_invoke_all('link', 'trackback', $tb, FALSE) : array());
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} while ($tb = db_fetch_object($result));
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return theme('trackbacks', $received);
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}
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}
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function trackback_form_alter(&$form, $form_state, $form_id) {
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if ($form_id == 'node_type_form' && isset($form['identity']['type'])) {
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$form['workflow']['trackback'] = array(
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'#type' => 'radios',
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'#title' => t('Trackbacks'),
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'#options' => array(t('Disabled'), t('Enabled')),
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'#default_value' => _trackback_node_type($form['#node_type']->type),
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'#description' => t('Enable trackbacks for this node type.')
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);
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}
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else if (isset($form['type']) && $form['type']['#value'] .'_node_form' == $form_id) {
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$node = $form['#node'];
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if (_trackback_node_type($node->type)) {
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$form['trackback'] = array(
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'#type' => 'fieldset',
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'#title' => t('Trackbacks'),
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'#collapsible' => TRUE
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);
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$form['trackback']['can_receive'] = array(
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'#type' => 'checkbox',
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'#title' => t('Allow Trackbacks'),
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'#default_value' => isset($node->can_receive) ? $node->can_receive : 1,
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'#description' => t('Allow other posts to send trackbacks to this content.')
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);
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$form['trackback']['trackback_urls'] = array(
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'#type' => 'textarea',
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'#title' => t('Send Trackbacks'),
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'#default_value' => isset($node->trackback_urls) ? $node->trackback_urls : '',
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'#cols' => 80,
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'#rows' => 4,
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'#description' => t('Enter one URL per line for each trackback you wish to send.')
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);
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// if there are any past successful trackbacks from this posting, add them to the node editing page.
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// if there are any past unsuccessful trackbacks from this posting, add checkmarks to enable resending them
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$past_successes_listing = array();
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$options = array();
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if (isset($node->nid)) {
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$result = db_query('SELECT url, successful FROM {trackback_sent} WHERE nid = %d', $node->nid);
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while ($url = db_fetch_object($result)) {
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if ($url->successful) {
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$past_successes_listing[] = $url->url;
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}
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else {
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$options[$url->url] = $url->url;
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}
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}
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}
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// add listing of successfully trackbacked URLs
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if (count($past_successes_listing)) {
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$form['trackback'][] = array(
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'#value' => theme('item_list', $past_successes_listing, t('Successful URLs'))
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);
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//t('These URLs have been successfuly pinged by this post.')
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}
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// add listing of unsuccessfully trackbacked URLs
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if (count($options)) {
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$form['trackback']['trackback_urls_to_retry'] = array(
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'#type' => 'checkboxes',
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'#title' => t('Unsuccessful URLs'),
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'#default_value' => array(),
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'#options' => $options,
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'#description' => t('Attempts to ping these URLs with this post have failed. Mark a check next to the trackback URLs you wish to retry for this post.')
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);
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}
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}
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}
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}
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function trackback_nodeapi(&$node, $op, $teaser = NULL, $page = NULL) {
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switch ($op) {
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case 'load':
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if (_trackback_node_type($node->type)) {
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$q = db_fetch_object(db_query('SELECT * FROM {trackback_node} WHERE nid=%d', $node->nid));
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return array('can_receive' => $q ? $q->can_receive : 1);
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}
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break;
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case 'alter':
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if (empty($node->in_preview)) {
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if (!empty($node->can_receive)) {
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$url = url('node/'. $node->nid, array('absolute' => TRUE));
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$tb_url = url('trackback/'. $node->nid, array('absolute' => TRUE));
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$autodetect = "\n<!--\n";
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$autodetect .= '<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/">'."\n";
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$autodetect .= '<rdf:Description rdf:about="'. $url .'" dc:identifier="'. $url .'" dc:title="'. strtr(check_plain($node->title), array('--' => '—')) .'" trackback:ping="'. $tb_url .'" />'."\n";
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$autodetect .= '</rdf:RDF>';
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$autodetect .= "\n-->\n";
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if ($teaser) {
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$node->teaser .= $autodetect;
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}
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else {
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$node->trackback = array(
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'autodetect' => $autodetect,
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'url' => theme('trackback_url', $tb_url)
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);
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}
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}
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if (!$teaser && variable_get('trackback_view', 0) == 0) {
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$node->trackback['received'] = trackback_render($node);
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}
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if (!empty($node->trackback)) {
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$node->body .= implode('', $node->trackback);
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}
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}
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break;
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case 'validate':
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if (!empty($node->trackback_urls)) {
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foreach (explode("\n", $node->trackback_urls) as $url) {
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$url = trim($url);
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if ($url && !_trackback_valid_url($url)) {
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form_set_error('trackback_urls', t('The trackback url %url is not a valid url.', array('%url' => $url)));
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}
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}
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}
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break;
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case 'insert':
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case 'update':
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if (_trackback_node_type($node->type)) {
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include_once TRACKBACK_PATH .'/trackback.ping.inc';
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register_shutdown_function('_trackback_send', $node);
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$cron = ($node->status && variable_get('trackback_auto_detection_enabled', 0) == 2);
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db_lock_table('trackback_node');
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db_query("UPDATE {trackback_node} SET awaiting_cron=%d, can_receive=%d WHERE nid=%d", $cron, $node->can_receive, $node->nid);
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if (!db_affected_rows()) {
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db_query("INSERT INTO {trackback_node}(nid, awaiting_cron, can_receive) VALUES(%d, %d, %d)", $node->nid, $cron, $node->can_receive);
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}
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db_unlock_tables();
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}
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break;
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case 'delete':
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if (TRACKBACK_WITH_SPAM) {
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db_query("DELETE FROM {spam_tracker} USING ({spam_tracker}, {trackback_received}) WHERE {spam_tracker}.source='trackback' AND {spam_tracker}.id={trackback_received}.trid AND {trackback_received}.nid=%d", $node->nid);
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}
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db_query("DELETE FROM {trackback_node} WHERE nid=%d", $node->nid);
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db_query("DELETE FROM {trackback_sent} WHERE nid=%d", $node->nid);
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db_query("DELETE FROM {trackback_received} WHERE nid=%d", $node->nid);
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break;
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}
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}
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function trackback_link($type, $node = NULL, $teaser = FALSE) {
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$links = array();
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switch ($type) {
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case 'node':
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if ($teaser) {
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$count = db_result(db_query("SELECT count(*) FROM {trackback_received} WHERE nid=%d AND status=1", $node->nid));
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if ($count) {
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$links[] = array(
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'title' => format_plural($count, '1 trackback', '@count trackbacks'),
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'href' => _trackback_path($node),
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'fragment' => 'trackbacks'
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);
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}
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}
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break;
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case 'trackback':
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if (!$teaser) {
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$links['trackback_edit'] = array(
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'title' => t('edit'),
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'href' => 'trackback/edit/'. $node->trid
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);
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}
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$links['trackback_delete'] = array(
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'title' => t('delete'),
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'href' => 'trackback/delete/'. $node->trid
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);
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if (TRACKBACK_WITH_SPAM) {
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$links += _trackback_spam_link($node);
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}
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break;
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}
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return $links;
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}
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function trackback_menu() {
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$items['admin/content/trackback'] = array(
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'title' => 'Trackbacks',
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'description' => 'List and edit site trackbacks and the trackback moderation queue.',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('trackback_admin_overview'),
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'access arguments' => array('administer trackbacks'),
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'file' => 'trackback.admin.inc'
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);
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// Tabs:
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$items['admin/content/trackback/list'] = array(
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'title' => 'List',
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'type' => MENU_DEFAULT_LOCAL_TASK,
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'weight' => -10
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);
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// Subtabs:
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$items['admin/content/trackback/list/new'] = array(
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'title' => 'Published trackbacks',
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'type' => MENU_DEFAULT_LOCAL_TASK,
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'weight' => -10
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);
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$items['admin/content/trackback/list/approval'] = array(
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'title' => 'Approval queue',
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'page arguments' => array('trackback_admin_overview', 'approval'),
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'type' => MENU_LOCAL_TASK
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);
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$items['admin/content/trackback/list/spam'] = array(
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'title' => 'Spam',
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'page arguments' => array('trackback_admin_overview', 'spam'),
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'access callback' => '_trackback_spam_access',
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'weight' => 10,
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'type' => MENU_LOCAL_TASK
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);
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$items['admin/content/trackback/settings'] = array(
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'title' => 'Settings',
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'page arguments' => array('trackback_configure'),
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'weight' => 10,
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'type' => MENU_LOCAL_TASK
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);
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// Other stuff:
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$items['trackback/%node'] = array(
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| 328 |
'title' => 'Trackbacks',
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| 329 |
'page callback' => 'trackback_page',
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| 330 |
'page arguments' => array(1),
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| 331 |
'access callback' => '_trackback_access',
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| 332 |
'access arguments' => array('receive', 1),
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| 333 |
'type' => MENU_CALLBACK,
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| 334 |
'file' => 'trackback.ping.inc'
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);
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| 336 |
$items['trackback/edit/%trackback'] = array(
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| 337 |
'title' => 'Moderate trackback',
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| 338 |
'page callback' => 'drupal_get_form',
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| 339 |
'page arguments' => array('trackback_edit', 2),
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| 340 |
'access callback' => '_trackback_access',
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| 341 |
'access arguments' => array('edit', NULL, 2),
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| 342 |
'type' => MENU_CALLBACK,
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| 343 |
'file' => 'trackback.admin.inc'
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| 344 |
);
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| 345 |
$items['trackback/delete/%trackback'] = array(
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| 346 |
'title' => 'Delete trackback',
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| 347 |
'page callback' => 'drupal_get_form',
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| 348 |
'page arguments' => array('trackback_delete', 2),
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| 349 |
'access callback' => '_trackback_access',
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| 350 |
'access arguments' => array('edit', NULL, 2),
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| 351 |
'type' => MENU_CALLBACK,
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| 352 |
'file' => 'trackback.admin.inc'
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| 353 |
);
|
| 354 |
$items['node/%node/trackback'] = array(
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| 355 |
'title' => 'Trackbacks',
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| 356 |
'page callback' => 'trackback_view_page',
|
| 357 |
'page arguments' => array(1),
|
| 358 |
'access callback' => '_trackback_access',
|
| 359 |
'access arguments' => array('page', 1),
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| 360 |
'weight' => 2,
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| 361 |
'type' => MENU_LOCAL_TASK
|
| 362 |
);
|
| 363 |
return $items;
|
| 364 |
}
|
| 365 |
|
| 366 |
function trackback_perm() {
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| 367 |
return array('administer trackbacks');
|
| 368 |
}
|
| 369 |
|
| 370 |
function _trackback_access($op, $node, $trackback = NULL) {
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| 371 |
switch ($op) {
|
| 372 |
case 'page':
|
| 373 |
if (variable_get('trackback_view', 0) != 1) {
|
| 374 |
return FALSE;
|
| 375 |
}
|
| 376 |
case 'view':
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| 377 |
return node_access('view', $node) && db_result(db_query('SELECT count(*) FROM {trackback_received} WHERE nid=%d AND status=1', $node->nid));
|
| 378 |
case 'edit':
|
| 379 |
if (user_access('administer trackbacks')) {
|
| 380 |
return TRUE;
|
| 381 |
}
|
| 382 |
if (empty($node) && !empty($trackback->nid)) {
|
| 383 |
$node = node_load($trackback->nid);
|
| 384 |
}
|
| 385 |
return node_access('update', $node);
|
| 386 |
case 'receive':
|
| 387 |
return !empty($node->can_receive) && node_access('view', $node);
|
| 388 |
}
|
| 389 |
}
|
| 390 |
|
| 391 |
function _trackback_spam_access() {
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| 392 |
return TRACKBACK_WITH_SPAM && user_access('administer trackbacks');
|
| 393 |
}
|
| 394 |
|
| 395 |
function trackback_load($trid) {
|
| 396 |
return db_fetch_object(db_query('SELECT * FROM {trackback_received} WHERE trid=%d', $trid));
|
| 397 |
}
|
| 398 |
|
| 399 |
function trackback_view_page($node) {
|
| 400 |
drupal_set_title(check_plain($node->title));
|
| 401 |
return trackback_render($node);
|
| 402 |
}
|
| 403 |
|
| 404 |
function trackback_cron() {
|
| 405 |
// query for all nodes where
|
| 406 |
$result = db_query('SELECT t.nid, n.status FROM {trackback_node} t INNER JOIN {node} n ON t.nid = n.nid WHERE t.awaiting_cron = 1');
|
| 407 |
|
| 408 |
while ($node = db_fetch_object($result)) {
|
| 409 |
// First things first, let's unset the 'awaiting_cron' bit in the {trackback_node} table.
|
| 410 |
db_query('UPDATE {trackback_node} SET awaiting_cron = 0 WHERE nid = %d', $node->nid);
|
| 411 |
if ($node->status) {
|
| 412 |
include_once TRACKBACK_PATH .'/trackback.ping.inc';
|
| 413 |
$node = node_load($node->nid);
|
| 414 |
_trackback_ping($node, trackback_urls_via_nodebody($node));
|
| 415 |
}
|
| 416 |
}
|
| 417 |
}
|
| 418 |
|
| 419 |
function trackback_block($op = 'list', $delta = 0, $edit = array()) {
|
| 420 |
if ($op == 'list') {
|
| 421 |
$blocks[0]['info'] = t('Recent trackbacks');
|
| 422 |
if (variable_get('trackback_view', 0) == 2) {
|
| 423 |
$blocks[1]['info'] = t('Trackbacks');
|
| 424 |
$blocks[1]['cache'] = BLOCK_CACHE_PER_PAGE | BLOCK_CACHE_PER_ROLE;
|
| 425 |
}
|
| 426 |
return $blocks;
|
| 427 |
}
|
| 428 |
|
| 429 |
if ($delta == 0) {
|
| 430 |
switch ($op) {
|
| 431 |
case 'configure':
|
| 432 |
$form['trackback_display_number'] = array(
|
| 433 |
'#type' => 'select',
|
| 434 |
'#title' => t('Number of trackbacks to display'),
|
| 435 |
'#default_value' => variable_get('trackback_display_number', 10),
|
| 436 |
'#options' => drupal_map_assoc(array(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30)),
|
| 437 |
'#description' => t('How many trackbacks are displayed in the recent trackbacks block')
|
| 438 |
);
|
| 439 |
return $form;
|
| 440 |
|
| 441 |
case 'save':
|
| 442 |
variable_set('trackback_display_number', $edit['trackback_display_number']);
|
| 443 |
break;
|
| 444 |
|
| 445 |
case 'view':
|
| 446 |
$result = db_query_range('SELECT * FROM {trackback_received} WHERE status=1 ORDER BY created DESC', 0, variable_get('trackback_display_number', 10));
|
| 447 |
$items = array();
|
| 448 |
while ($tb = db_fetch_object($result)) {
|
| 449 |
$items[] = _trackback_path($tb, truncate_utf8($tb->subject, 128, FALSE, TRUE)) .'<br />'. t('%time ago', array('%time' => format_interval(time() - $tb->created)));
|
| 450 |
}
|
| 451 |
$block['subject'] = t('Recent trackbacks');
|
| 452 |
$block['content'] = theme('item_list', $items);
|
| 453 |
return $block;
|
| 454 |
}
|
| 455 |
}
|
| 456 |
else if ($op == 'view' && variable_get('trackback_view', 0) == 2) {
|
| 457 |
if (arg(0) == 'node' && is_numeric(arg(1)) && is_null(arg(2))) {
|
| 458 |
$node = node_load(arg(1));
|
| 459 |
if (_trackback_access('view', $node)) {
|
| 460 |
$block['subject'] = t('Trackbacks');
|
| 461 |
$block['content'] = trackback_render($node);
|
| 462 |
return $block;
|
| 463 |
}
|
| 464 |
}
|
| 465 |
}
|
| 466 |
}
|
| 467 |
|
| 468 |
function _trackback_valid_url($url) {
|
| 469 |
$uc = '[a-z0-9;/?:@&=+$,_.!~*\'()%-]';
|
| 470 |
return preg_match('`^(http|https)://'. $uc .'+(#'. $uc .'*)?$`i', $url);
|
| 471 |
}
|
| 472 |
|
| 473 |
// Code that adds configurability for trackback features.
|
| 474 |
function _trackback_node_type($type) {
|
| 475 |
static $types = array('story', 'forum', 'blog');
|
| 476 |
return variable_get('trackback_'. $type, in_array($type, $types) ? 1 : 0);
|
| 477 |
}
|
| 478 |
|
| 479 |
function _trackback_path($obj, $text = NULL, $opt = array()) {
|
| 480 |
static $prefix;
|
| 481 |
|
| 482 |
if (!isset($prefix)) {
|
| 483 |
$prefix = variable_get('trackback_view', 0) == 1 ? '/trackback' : '';
|
| 484 |
}
|
| 485 |
if (!isset($text)) {
|
| 486 |
return 'node/'. $obj->nid . $prefix;
|
| 487 |
}
|
| 488 |
if ($obj->status) {
|
| 489 |
$opt += array('fragment' => 'trackback-'. $obj->trid);
|
| 490 |
return l($text, 'node/'. $obj->nid . $prefix, $opt);
|
| 491 |
}
|
| 492 |
return l($text, 'trackback/edit/'. $obj->trid, $opt);
|
| 493 |
}
|
| 494 |
|
| 495 |
function _trackback_operation($action, $trackback, $clear = TRUE) {
|
| 496 |
if (is_numeric($trackback)) {
|
| 497 |
$trackback = trackback_load($trackback);
|
| 498 |
}
|
| 499 |
if ($trackback) {
|
| 500 |
switch ($action) {
|
| 501 |
case 'publish':
|
| 502 |
db_query('UPDATE {trackback_received} SET status=1 WHERE trid=%d', $trackback->trid);
|
| 503 |
$trackback->status = 1;
|
| 504 |
trackback_invoke_trackback($trackback, $action);
|
| 505 |
watchdog('trackback', 'Published trackback %subject.', array('%subject' => $trackback->subject), WATCHDOG_NOTICE, _trackback_path($trackback, t('view')));
|
| 506 |
break;
|
| 507 |
|
| 508 |
case 'unpublish':
|
| 509 |
db_query('UPDATE {trackback_received} SET status=0 WHERE trid=%d', $trackback->trid);
|
| 510 |
$trackback->status = 0;
|
| 511 |
trackback_invoke_trackback($trackback, $action);
|
| 512 |
watchdog('trackback', 'Unpublished trackback %subject.', array('%subject' => $trackback->subject), WATCHDOG_NOTICE, _trackback_path($trackback, t('view')));
|
| 513 |
break;
|
| 514 |
|
| 515 |
case 'delete':
|
| 516 |
db_query('DELETE FROM {trackback_received} WHERE trid=%d', $trackback->trid);
|
| 517 |
trackback_invoke_trackback($trackback, $action);
|
| 518 |
watchdog('trackback', 'Deleted trackback %subject. The trackback was posted to !link.', array('%subject' => $trackback->subject, '!link' => l(url('node/'. $trackback->nid, array('absolute' => TRUE)), 'node/'. $trackback->nid)));
|
| 519 |
break;
|
| 520 |
|
| 521 |
default:
|
| 522 |
$action($trackback);
|
| 523 |
break;
|
| 524 |
}
|
| 525 |
if ($clear) {
|
| 526 |
cache_clear_all();
|
| 527 |
}
|
| 528 |
}
|
| 529 |
return $trackback;
|
| 530 |
}
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