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<?php
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// $Id: discussthis.module,v 1.6 2008/06/24 01:05:27 spiderman Exp $
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// Hook Implementations
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/**
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* Display help and module information
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* @param section which section of the site we're displaying help for
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* @return help text for section
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**/
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function discussthis_help($section='') {
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$output = '';
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switch ($section) {
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case 'admin/help#discussthis':
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$output = '<p>'. t('Displays links to discussion forums for a given node. Administrators can select the types of nodes for which this is enabled, and for each of these, which forum new topics should be created in.') .'</p>';
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$output .= filter_filter('process', 2, null, file_get_contents(dirname(__FILE__) .'/README.txt') );
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break;
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}
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return $output;
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}
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/**
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* Valid permissions for this module
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* @return array An array of valid permissions for the discussthis module
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**/
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function discussthis_perm() {
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return array('administer discuss this', 'override discuss this forums', 'access discuss this links');
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}
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/**
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* hook_menu implementation
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* @param may_cache whether the menu items might be cached
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* @return array list of menu items
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**/
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function discussthis_menu($may_cache) {
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$items = array();
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if (!$may_cache) {
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$items[] = array(
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'path' => 'admin/settings/discussthis',
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'title' => t('Discuss This'),
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'description' => t('Configure discuss this module defaults, including what node types and what forums to link to.'),
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'callback' => 'drupal_get_form',
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'callback arguments' => 'discussthis_admin',
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'access' => user_access('administer discuss this'),
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'type' => MENU_NORMAL_ITEM,
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);
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$items[] = array(
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'path' => 'discussthis/new',
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'callback' => 'discussthis_new',
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'access' => user_access('access discuss this links'),
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'type' => MENU_CALLBACK,
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);
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$items[] = array('path' => 'discussthis/autocomplete',
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'title' => t('Autocomplete forum topics'),
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'callback' => 'discussthis_autocomplete',
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'access' => user_access('access content'),
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'type' => MENU_CALLBACK);
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}
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return $items;
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}
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/**
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* hook_nodeapi implementation
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* This is the meat of the module. Here we add the
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* Discuss This link which will create a new forum topic if none exists, or
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* link to the existing one if it does. Also adds forum override dropdown on add/edit screen
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* for users with override permissions
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*
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* @param node the node being acted on
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* @param op the operation being done to the node
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* @param teaser whether this is a teaser view
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* @param page whether this is a full page view
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**/
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function discussthis_nodeapi(&$node, $op, $teaser, $page) {
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$enabled = variable_get('discussthis_node_'. $node->type, 0);
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// If this is an discussthis-enabled node type, treat the per-node fields appropriately
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if ($enabled) {
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switch ($op) {
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case 'validate': // validate forum override selection
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break;
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case 'insert': // create or update/move forum topic
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case 'update':
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$forum_tid = $node->discussthis['forum'];
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$typed_title = $node->discussthis['topic'];
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// unquote commas and/or doublequotes created by autocomplete function before storing
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$typed_title = str_replace('""', '"', preg_replace('/^"(.*)"$/', '\1', $typed_title));
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$typed_title = trim($typed_title);
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// store the forum and topic mapping in the db
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_discussthis_set_forum($node->nid, $forum_tid);
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_discussthis_set_topic($node->nid, $typed_title);
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break;
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case 'view':
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if (!$teaser && user_access('access discuss this links')) {
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$topic_nid = _discussthis_get_topic($node->nid); // lookup a nid for the topic, if it exists (otherwise 0)
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# grab X most recent comments, and attach them to the node:
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$result = db_query_range('SELECT c.nid, c.uid, c.name, c.subject, c.cid, c.timestamp FROM {comments} c INNER JOIN {node} n ON n.nid = c.nid WHERE c.nid = %d AND n.status = 1 AND c.status = %d ORDER BY c.cid DESC', $topic_nid, COMMENT_PUBLISHED, 0, variable_get('discussthis_comments',10));
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while ($comment = db_fetch_object($result)) {
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$comments[] = theme('discussthis_comment',$topic_nid,$comment);
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}
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$node->content['discussthis_comments'] = array(
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'#value' => theme('item_list',$comments),
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'#weight' => 50,
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);
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}
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break;
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case 'load':
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// return array of fields => values to be merged into $node
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break;
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case 'delete':
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// drop db row for this node.. what should happen to the forum topic?
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break;
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}
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}
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elseif ($node->type == 'forum') {
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switch ($op) {
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case 'delete':
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// drop db row for this forum nid
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$sql = 'DELETE FROM {discussthis} WHERE topic_nid = %d';
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db_query($sql, $node->nid);
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break;
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}
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}
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}
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/**
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* hook_link implementation
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* This adds the custom link to the node view
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* @param type An identifier declaring what kind of link is being requested
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* @param node A node object being passed in the case of node inks
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* @param teaser A boolean flag depending on whether the node is displayed with its teaser or full form
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* @return An array of the requested links
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**/
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function discussthis_link($type, $node = null, $teaser = false) {
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$links = array();
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if ($type == 'node') {
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$enabled = variable_get('discussthis_node_'. $node->type, 0);
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if ($enabled && user_access('access discuss this links')) {
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$topic_nid = _discussthis_get_topic($node->nid); // lookup a nid for the topic, if it exists (otherwise 0)
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if ($topic_nid) { // link to add a comment to the existing topic
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$links['discussthis'] = array(
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'title' => t('Discuss This!'),
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'href' => 'node/'. $topic_nid,
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);
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}
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else { // link to a callback page which creates a topic, then redirects to add a comment to it
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$links['discussthis'] = array(
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'title' => t('Discuss This!'),
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'href' => 'discussthis/new/'. $node->nid,
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);
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}
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}
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}
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return $links;
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}
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/**
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* hook_form_alter implementation
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* Adds per-node override forum dropdown and topic autocomplete form for node edit forms
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* @param form_id the id of the form to be altered
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* @param form the form itself
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**/
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function discussthis_form_alter($form_id, &$form) {
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// We're only modifying node forms, if the type field isn't set we don't need
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// to bother; otherwise, store it for later retrieval.
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if (isset($form['type'])) {
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$type = $form['type']['#value'];
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}
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elseif (isset($form['orig_type'])) {
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$type = $form['orig_type']['#value'];
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}
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else {
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return;
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}
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# only modify the form if this node type is discussthis-enabled
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if (!variable_get('discussthis_node_'.$type,0)) { return; }
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// The discuss this link is enabled on a per node type basis. The variable used to store
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// this information is named using both the name of this module, to avoid namespace
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// conflicts, and the node type, because we support multiple node types.
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switch ($form_id) {
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case $type .'_node_form':
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// here we need to look up any existing forum topic for this node, for use in the autocomplete field below..
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$nid = $form['nid']['#value'];
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$forum_tid = _discussthis_get_forum($nid, $type);
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$forum_nid = _discussthis_get_topic($nid);
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$topic = node_load(array('nid' => $forum_nid));
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// If discuss this is enabled for this node type, insert the fieldset
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if ($forum_tid && user_access('override discuss this forums')) {
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$forums = forum_get_forums();
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foreach ($forums as $tid => $forum) {
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if (!$forum->container) { $discussthis_forums[$tid] = $forum->name; }
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}
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$form['discussthis'] = array(
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'#type' => 'fieldset',
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'#title' => t('Discuss This'),
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'#collapsible' => true,
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'#collapsed' => true,
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'#weight' => 1,
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'#tree' => true,
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);
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$form['discussthis']['forum'] = array(
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'#type' => 'select',
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'#title' => t('Forum for new discussions on this node'),
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'#required' => true,
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'#description' => t('Select the forum where a NEW discussion will be created if none exist.'),
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'#options' => $discussthis_forums,
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'#default_value' => $forum_tid,
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'#weight' => 2,
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);
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$form['discussthis']['topic'] = array(
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'#type' => 'textfield',
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'#title' => t('Forum topic for discussions on this node'),
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'#description' => t('The forum topic where discussions of this node appear'),
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'#default_value' => $topic->title,
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'#autocomplete_path' => 'discussthis/autocomplete/'. $forum_tid,
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'#maxlength' => 255,
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'#weight' => 3,
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);
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}
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break;
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}
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}
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/**
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* Generate HTML for the discussthis block
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* @param op the operation from the URL
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* @param delta offset
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* @returns block HTML
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*/
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function discussthis_block($op='list', $delta=0) {
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if ($op == 'list') {
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$block[0]['info'] = t('Discuss This');
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return $block;
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}
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else if ($op == 'view') {
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// show a list of recent comments in the relevant discussion topic for this node
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$block['subject'] = t('Discuss This!');
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$block['content'] = '';
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return $block;
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}
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}
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/**
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* Implementation of hook_token_list provides a list of tokens this module makes available
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* @param type the context of the tokens being requested
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* @return array of tokens grouped by context
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**/
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function discussthis_token_list($type = 'all') {
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if ($type == 'discussthis' || $type == 'all') {
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$tokens['discussthis']['node-link'] = t('A link to the original node under discussion.');
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$tokens['discussthis']['node-title'] = t('The title of the original node.');
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$tokens['discussthis']['node-type-name'] = t('The name of the original node\'s type.');
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$tokens['discussthis']['node-type'] = t('The original node\'s type.');
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return $tokens;
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}
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}
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/**
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* Implementation of hook_token_values provides the values for discussthis tokens
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* @param type the context/type of object
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* @param object the object itself
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* @param options the options, context and object-sensitive
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* @return array of token values keyed by their name
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**/
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function discussthis_token_values($type, $object = NULL, $options = array()) {
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if ($type == 'discussthis') {
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$tokens['node-link'] = l(t($object->title), 'node/'. $object->nid);
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$tokens['node-title'] = t($object->title);
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$tokens['node-type-name'] = node_get_types('name',$object);
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$tokens['node-type'] = $object->type;
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return $tokens;
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}
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}
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// Callback Functions
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/**
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* Admin settings callback (from menu hook)
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* The admin/settings/discussthis page provides three sets of configuration options:
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* 1. The author of newly-created forum discussions
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* 2. The set of node types for which Discuss This! links should appear
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* 3. For each selected node type, a default forum in which to create discussion topics
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**/
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function discussthis_admin() {
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$node_types = node_get_types('names');
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$discussthis_nodetypes = variable_get('discussthis_nodetypes', $node_types);
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$admin = user_load(array('uid' => 1));
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$form['discussthis_author'] = array(
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'#type' => 'textfield',
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'#title' => t('Author of newly created Forum discussions'),
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'#size' => 30,
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'#maxlength' => 60,
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'#autocomplete_path' => 'user/autocomplete',
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'#default_value' => variable_get('discussthis_author', $admin->name),
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'#weight' => -4,
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);
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$form['discussthis_newsubject'] = array(
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'#type' => 'textfield',
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'#title' => t('Title for newly created Forum discussions'),
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'#size' => 30,
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'#maxlength' => 60,
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'#default_value' => variable_get('discussthis_newsubject', '[node-title]'),
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'#weight' => -3,
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);
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$default_body = 'Following is a discussion on the [node-type-name] item titled: [node-link]'.
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'.<br /> Below is the discussion so far. Feel free to add your own comments!<br />';
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$form['discussthis_newtemplate'] = array(
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'#type' => 'textarea',
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'#title' => t('Template for auto-created Forum discussions'),
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'#description' => theme('token_help','discussthis'),
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'#default_value' => variable_get('discussthis_newtemplate',$default_body),
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'#weight' => -2,
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);
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$form['discussthis_comments'] = array(
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'#type' => 'select',
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'#title' => t('How many recent comments should be displayed with non-teaser node view?'),
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'#options' => array(1 => '1', 2 => '2', 3 => '3', 4 => '4', 5 => '5', 10 => '10'),
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'#default_value' => variable_get('discussthis_comments',10),
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);
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$form['discussthis_nodetypes'] = array(
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'#type' => 'checkboxes',
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'#title' => t('Which node types should use the Discuss This feature'),
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'#description' => t('Select all node types which should allow Discuss This links to a corresponding forum topic.'),
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'#default_value' => $discussthis_nodetypes,
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'#options' => $node_types,
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);
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$forums = forum_get_forums();
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$discussthis_forums = array('0' => '-- select --');
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| 351 |
foreach ($forums as $tid => $forum) {
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| 352 |
if (!$forum->container) { $discussthis_forums[$tid] = $forum->name; }
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}
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| 355 |
// This should probably be within the node type config page, or else use some AJAXy thing to update
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| 356 |
// these form fields based on the discussthis_nodetypes selection above..
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| 357 |
foreach ($discussthis_nodetypes as $type => $name) {
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| 358 |
if ($name) {
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| 359 |
$form['defaults']['discussthis_node_'. $type] = array(
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| 360 |
'#type' => 'select',
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| 361 |
'#title' => 'Default forum for '. $node_types[$type] .' nodes',
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| 362 |
'#default_value' => variable_get('discussthis_node_'. $type, 0),
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| 363 |
'#options' => $discussthis_forums,
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);
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| 365 |
}
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else {
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| 367 |
$form['defaults']['discussthis_node_'. $type] = array(
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| 368 |
'#type' => 'hidden',
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| 369 |
'#value' => '0',
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);
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| 371 |
}
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| 372 |
}
|
| 373 |
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| 374 |
return system_settings_form($form);
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| 375 |
}
|
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| 377 |
/**
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| 378 |
* Create a new discussion forum topic for the given nid, and redirect the user
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| 379 |
* to post a comment on that topic
|
| 380 |
**/
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| 381 |
function discussthis_new($nid) {
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| 382 |
$topic_nid = _discussthis_new_topic($nid);
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| 383 |
drupal_goto('comment/reply/'. $topic_nid, null, 'comment-form');
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}
|
| 385 |
|
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/**
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| 387 |
* Autocomplete a forum topic discussion title
|
| 388 |
**/
|
| 389 |
function discussthis_autocomplete($tid, $string = '') {
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| 390 |
// The user enters a title for a forum topic.
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| 391 |
if ($string != '') {
|
| 392 |
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| 393 |
// Grab the first 10 forum nodes with titles like the string typed by the user
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| 394 |
$result = db_query_range(db_rewrite_sql('SELECT n.nid,n.title FROM {node} n WHERE n.type = "forum" AND LOWER(n.title) LIKE LOWER("%s%%")'), $string, 0, 10);
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| 396 |
$matches = array();
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| 397 |
while ($node = db_fetch_object($result)) {
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| 398 |
$n = $node->title;
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| 399 |
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| 400 |
// Quote any commas or doublequotes for security reasons (XSS)
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| 401 |
if (strpos($node->title, ',') !== false || strpos($node->title, '"') !== false) {
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| 402 |
$n = '"'. str_replace('"', '""', $node->title) .'"';
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| 403 |
}
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| 404 |
$matches[$n] = check_plain($node->title);
|
| 405 |
}
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| 406 |
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| 407 |
echo drupal_to_js($matches);
|
| 408 |
exit();
|
| 409 |
}
|
| 410 |
}
|
| 411 |
|
| 412 |
// Utility Functions
|
| 413 |
|
| 414 |
/**
|
| 415 |
* Lookup the given nid in the discussthis_forums db table, and return the corresponding forum tid, otherwise 0
|
| 416 |
**/
|
| 417 |
function _discussthis_get_forum($nid, $type) {
|
| 418 |
$sql = 'SELECT forum_tid FROM {discussthis_forums} WHERE nid=%d';
|
| 419 |
$forum_tid = db_result(db_query($sql, $nid));
|
| 420 |
if (!$forum_tid) {
|
| 421 |
$forum_tid = variable_get('discussthis_node_'. $type, 0);
|
| 422 |
}
|
| 423 |
return $forum_tid;
|
| 424 |
}
|
| 425 |
|
| 426 |
/**
|
| 427 |
* Store a mapping between the given nid and a forum tid
|
| 428 |
**/
|
| 429 |
function _discussthis_set_forum($nid, $tid) {
|
| 430 |
$sql = 'REPLACE INTO {discussthis_forums} (nid,forum_tid) VALUES (%d,%d)';
|
| 431 |
db_query($sql, $nid, $tid);
|
| 432 |
}
|
| 433 |
|
| 434 |
/**
|
| 435 |
* Lookup the given nid in the discussthis db table, and return the corresponding forum topic nid, otherwise
|
| 436 |
* return the default for this node type
|
| 437 |
**/
|
| 438 |
function _discussthis_get_topic($nid) {
|
| 439 |
// lookup the nid in the db table, and return it's corresponding forum topic nid, otherwise 0
|
| 440 |
$sql = 'SELECT topic_nid FROM {discussthis} WHERE nid=%d';
|
| 441 |
$topic = db_result(db_query($sql, $nid));
|
| 442 |
if ($topic) { return $topic; }
|
| 443 |
else { return 0; }
|
| 444 |
}
|
| 445 |
|
| 446 |
/**
|
| 447 |
* Store a mapping between the given nid and a forum topic nid
|
| 448 |
**/
|
| 449 |
function _discussthis_set_topic($nid, $title) {
|
| 450 |
// lookup the topic title first, and get a forum_nid from that
|
| 451 |
$sql = 'SELECT n.nid,n.title FROM {node} n WHERE n.title like "%s" and n.type = "forum"';
|
| 452 |
$result = db_query(db_rewrite_sql($sql), $title);
|
| 453 |
$topic = db_fetch_object($result);
|
| 454 |
|
| 455 |
if ($topic->nid) {
|
| 456 |
// now just store the mapping in the discussthis_forums table
|
| 457 |
$sql = 'REPLACE INTO {discussthis} (nid,topic_nid) VALUES (%d,%d)';
|
| 458 |
db_query($sql, $nid, $topic->nid);
|
| 459 |
}
|
| 460 |
else {
|
| 461 |
// if there was no match, ignore, and remove any existing mapping?
|
| 462 |
$sql = 'DELETE FROM {discussthis} WHERE nid=%d';
|
| 463 |
db_query($sql, $nid);
|
| 464 |
}
|
| 465 |
}
|
| 466 |
|
| 467 |
/**
|
| 468 |
* Create a new forum topic for the given nid, store the correspondence in the db, and return the new topic nid
|
| 469 |
**/
|
| 470 |
function _discussthis_new_topic($nid) {
|
| 471 |
// load the node, to get its title/details
|
| 472 |
$node = node_load(array('nid' => $nid));
|
| 473 |
$type = node_get_types('name', $node);
|
| 474 |
$tid = _discussthis_get_forum($nid, $node->type);
|
| 475 |
$admin = user_load(array('uid' => 1));
|
| 476 |
|
| 477 |
// create the new forum topic with relevant stock text (and a link back to the original node)
|
| 478 |
$newnode = array('type' => 'forum');
|
| 479 |
$values = array();
|
| 480 |
$values['name'] = variable_get('discussthis_author', $admin->name);
|
| 481 |
$values['title'] = token_replace(variable_get('discussthis_newsubject','[node-title]'), 'discussthis', $node);
|
| 482 |
|
| 483 |
$default_body = 'Following is a discussion on the [node-type-name] item titled: [node-link]'.
|
| 484 |
'.<br /> Below is the discussion so far. Feel free to add your own comments!<br />';
|
| 485 |
$values['body'] = token_replace(variable_get('discussthis_newtemplate',$default_body), 'discussthis', $node);
|
| 486 |
|
| 487 |
$values['taxonomy'][1] = $tid;
|
| 488 |
$values['status'] = 1;
|
| 489 |
drupal_execute('forum_node_form', $values, $newnode);
|
| 490 |
|
| 491 |
$errors = form_get_errors();
|
| 492 |
if (!empty($errors)) {
|
| 493 |
// do something?
|
| 494 |
ob_start(); print_r($errors);
|
| 495 |
drupal_set_message('there was an error creating the new discussion: '. ob_get_contents());
|
| 496 |
ob_end_clean();
|
| 497 |
}
|
| 498 |
|
| 499 |
// get the new nid (not ideal, but using drupal_execute doesn't return a node object, so this
|
| 500 |
// is the best way I could come up with to retrieve the nid of the node we just created)
|
| 501 |
$newnode['title'] = $values['title'];
|
| 502 |
$topic = node_load($newnode);
|
| 503 |
|
| 504 |
// store the nid -> forum nid mapping in the db
|
| 505 |
$sql = 'REPLACE INTO {discussthis} (nid,topic_nid) VALUES (%d,%d)';
|
| 506 |
db_query($sql, array($node->nid, $topic->nid));
|
| 507 |
|
| 508 |
// return the new topic nid
|
| 509 |
return $topic->nid;
|
| 510 |
}
|
| 511 |
|
| 512 |
// Theme Functions
|
| 513 |
|
| 514 |
function theme_discussthis_comment($topic_nid,$comment) {
|
| 515 |
$output = "<div class=\"discussthis-comment\">\n";
|
| 516 |
$output .= ' <span class="subject">'. l($comment->subject, 'node/'. $topic_nid, null, null, "comment-$comment->cid") .'</span> ';
|
| 517 |
$output .= '<span class="credit">'. t('by') .' '. theme('username', $comment) ."</span>\n";
|
| 518 |
$output .= "</div>\n";
|
| 519 |
return $output;
|
| 520 |
}
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