* Enable threaded discussions about general topics.
*/
/**
* Implementation of hook_help().
*/
function forum_help($path, $arg) {
switch ($path) {
case 'admin/help#forum':
$output = '<p>'. t('The forum module lets you create threaded discussion forums with functionality similar to other message board systems. Forums are useful because they allow community members to discuss topics with one another while ensuring those conversations are archived for later reference. The <a href="@create-topic">forum topic</a> menu item (under <em>Create content</em> on the Navigation menu) creates the initial post of a new threaded discussion, or thread.', array('@create-topic' => url('node/add/forum'))) .'</p>';
$output .= '<p>'. t('A threaded discussion occurs as people leave comments on a forum topic (or on other comments within that topic). A forum topic is contained within a forum, which may hold many similar or related forum topics. Forums are (optionally) nested within a container, which may hold many similar or related forums. Both containers and forums may be nested within other containers and forums, and provide structure for your message board. By carefully planning this structure, you make it easier for users to find and comment on a specific forum topic.') .'</p>';
$output .= '<p>'. t('When administering a forum, note that:') .'</p>';
$output .= '<ul><li>'. t('a forum topic (and all of its comments) may be moved between forums by selecting a different forum while editing a forum topic.') .'</li>';
$output .= '<li>'. t('when moving a forum topic between forums, the <em>Leave shadow copy</em> option creates a link in the original forum pointing to the new location.') .'</li>';
$output .= '<li>'. t('selecting <em>Read only</em> under <em>Comment settings</em> while editing a forum topic will lock (prevent new comments) on the thread.') .'</li>';
$output .= '<li>'. t('selecting <em>Disabled</em> under <em>Comment settings</em> while editing a forum topic will hide all existing comments on the thread, and prevent new ones.') .'</li></ul>';
$output .= '<p>'. t('For more information, see the online handbook entry for <a href="@forum">Forum module</a>.', array('@forum' => 'http://drupal.org/handbook/modules/forum/')) .'</p>';
return $output;
case 'admin/content/forum':
return '<p>'. t('This page displays a list of existing forums and containers. Containers (optionally) hold forums, and forums hold forum topics (a forum topic is the initial post to a threaded discussion). To provide structure, both containers and forums may be placed inside other containers and forums. To rearrange forums and containers, grab a drag-and-drop handle under the <em>Name</em> column and drag the forum or container to a new location in the list. (Grab a handle by clicking and holding the mouse while hovering over a handle icon.) Remember that your changes will not be saved until you click the <em>Save</em> button at the bottom of the page.') .'</p>';
case 'admin/content/forum/add/container':
return '<p>'. t('By grouping related or similar forums, containers help organize forums. For example, a container named "Food" may hold two forums named "Fruit" and "Vegetables", respectively.') .'</p>';
case 'admin/content/forum/add/forum':
return '<p>'. t('A forum holds related or similar forum topics (a forum topic is the initial post to a threaded discussion). For example, a forum named "Fruit" may contain forum topics titled "Apples" and "Bananas", respectively.') .'</p>';
case 'admin/content/forum/settings':
return '<p>'. t('These settings allow you to adjust the display of your forum topics. The content types available for use within a forum may be selected by editing the <em>Content types</em> on the <a href="@forum-vocabulary">forum vocabulary page</a>.', array('@forum-vocabulary' => url('admin/content/taxonomy/edit/vocabulary/'. variable_get('forum_nav_vocabulary', '')))) .'</p>';
if (db_result(db_query('SELECT COUNT(*) FROM {term_data} WHERE tid = %d AND vid = %d', $term, $vocabulary))) {
if (in_array($term, $containers)) {
$term = taxonomy_get_term($term);
form_set_error('taxonomy', t('The item %forum is only a container for forums. Please select one of the forums below it.', array('%forum' => $term->name)));
}
}
}
}
break;
// Assign forum taxonomy when adding a topic from within a forum.
if ($node->taxonomy && $tree = taxonomy_get_tree($vid)) {
// Get the forum terms from the (cached) tree if we have a taxonomy.
foreach ($tree as $term) {
$forum_terms[] = $term->tid;
}
foreach ($node->taxonomy as $term_id) {
if (in_array($term_id, $forum_terms)) {
$node->tid = $term_id;
}
}
$old_tid = db_result(db_query_range("SELECT t.tid FROM {term_node} t INNER JOIN {node} n ON t.vid = n.vid WHERE n.nid = %d ORDER BY t.vid DESC", $node->nid, 0, 1));
db_query('DELETE FROM {forum} WHERE nid = %d', $node->nid);
break;
case 'load':
return db_fetch_array(db_query('SELECT tid AS forum_tid FROM {forum} WHERE vid = %d', $node->vid));
}
return;
}
/**
* Implementation of hook_node_info().
*/
function forum_node_info() {
return array(
'forum' => array(
'name' => t('Forum topic'),
'module' => 'forum',
'description' => t('A <em>forum topic</em> is the initial post to a new discussion thread within a forum.'),
'title_label' => t('Subject'),
)
);
}
/**
* Implementation of hook_access().
*/
function forum_access($op, $node, $account) {
switch ($op) {
case 'create':
return user_access('create forum topics', $account);
case 'update':
return user_access('edit any forum topic', $account) || (user_access('edit own forum topics', $account) && ($account->uid == $node->uid));
case 'delete':
return user_access('delete any forum topic', $account) || (user_access('delete own forum topics', $account) && ($account->uid == $node->uid));
}
}
/**
* Implementation of hook_perm().
*/
function forum_perm() {
return array('create forum topics', 'delete own forum topics', 'delete any forum topic', 'edit own forum topics', 'edit any forum topic', 'administer forums');
}
/**
* Implementation of hook_taxonomy().
*/
function forum_taxonomy($op, $type, $term = NULL) {
if ($op == 'delete' && $term['vid'] == variable_get('forum_nav_vocabulary', '')) {
switch ($type) {
case 'term':
$results = db_query('SELECT tn.nid FROM {term_node} tn WHERE tn.tid = %d', $term['tid']);
while ($node = db_fetch_object($results)) {
// node_delete will also remove any association with non-forum vocabularies.
node_delete($node->nid);
}
// For containers, remove the tid from the forum_containers variable.
$sql = db_rewrite_sql("SELECT n.nid, n.title, l.comment_count, l.last_comment_timestamp FROM {node} n INNER JOIN {term_node} tn ON tn.vid = n.vid INNER JOIN {term_data} td ON td.tid = tn.tid INNER JOIN {node_comment_statistics} l ON n.nid = l.nid WHERE n.status = 1 AND td.vid = %d ORDER BY l.last_comment_timestamp DESC");
$sql = db_rewrite_sql("SELECT n.nid, n.title, l.comment_count FROM {node} n INNER JOIN {term_node} tn ON tn.vid = n.vid INNER JOIN {term_data} td ON td.tid = tn.tid INNER JOIN {node_comment_statistics} l ON n.nid = l.nid WHERE n.status = 1 AND td.vid = %d ORDER BY n.nid DESC");
$form['shadow'] = array('#type' => 'checkbox', '#title' => t('Leave shadow copy'), '#default_value' => $shadow, '#description' => t('If you move this topic, you can leave a link in the old forum to the new forum.'));
* Returns a list of all forums for a given taxonomy id
*
* Forum objects contain the following fields
* -num_topics Number of topics in the forum
* -num_posts Total number of posts in all topics
* -last_post Most recent post for the forum
*
* @param $tid
* Taxonomy ID of the vocabulary that holds the forum list.
* @return
* Array of object containing the forum information.
*/
function forum_get_forums($tid = 0) {
$forums = array();
$vid = variable_get('forum_nav_vocabulary', '');
$_forums = taxonomy_get_tree($vid, $tid);
if (count($_forums)) {
$counts = array();
$sql = "SELECT r.tid, COUNT(n.nid) AS topic_count, SUM(l.comment_count) AS comment_count FROM {node} n INNER JOIN {node_comment_statistics} l ON n.nid = l.nid INNER JOIN {term_node} r ON n.vid = r.vid WHERE n.status = 1 GROUP BY r.tid";
$sql = db_rewrite_sql($sql);
$_counts = db_query($sql);
while ($count = db_fetch_object($_counts)) {
$counts[$count->tid] = $count;
}
}
foreach ($_forums as $forum) {
if (in_array($forum->tid, variable_get('forum_containers', array()))) {
// This query does not use full ANSI syntax since MySQL 3.x does not support
// table1 INNER JOIN table2 INNER JOIN table3 ON table2_criteria ON table3_criteria
// used to join node_comment_statistics to users.
$sql = "SELECT ncs.last_comment_timestamp, IF (ncs.last_comment_uid != 0, u2.name, ncs.last_comment_name) AS last_comment_name, ncs.last_comment_uid FROM {node} n INNER JOIN {users} u1 ON n.uid = u1.uid INNER JOIN {term_node} tn ON n.vid = tn.vid INNER JOIN {node_comment_statistics} ncs ON n.nid = ncs.nid INNER JOIN {users} u2 ON ncs.last_comment_uid=u2.uid WHERE n.status = 1 AND tn.tid = %d ORDER BY ncs.last_comment_timestamp DESC";
* Calculate the number of nodes the user has not yet read and are newer
* than NODE_NEW_LIMIT.
*/
function _forum_topics_unread($term, $uid) {
$sql = "SELECT COUNT(n.nid) FROM {node} n INNER JOIN {term_node} tn ON n.vid = tn.vid AND tn.tid = %d LEFT JOIN {history} h ON n.nid = h.nid AND h.uid = %d WHERE n.status = 1 AND n.created > %d AND h.nid IS NULL";
$sql = db_rewrite_sql("SELECT n.nid, r.tid, n.title, n.type, n.sticky, u.name, u.uid, n.created AS timestamp, n.comment AS comment_mode, l.last_comment_timestamp, IF(l.last_comment_uid != 0, cu.name, l.last_comment_name) AS last_comment_name, l.last_comment_uid, l.comment_count AS num_comments, f.tid AS forum_tid FROM {node_comment_statistics} l INNER JOIN {node} n ON n.nid = l.nid INNER JOIN {users} cu ON l.last_comment_uid = cu.uid INNER JOIN {term_node} r ON n.vid = r.vid INNER JOIN {users} u ON n.uid = u.uid INNER JOIN {forum} f ON n.vid = f.vid WHERE n.status = 1 AND r.tid = %d");
$sql = "SELECT n.nid FROM {node} n LEFT JOIN {history} h ON n.nid = h.nid AND h.uid = %d INNER JOIN {term_node} r ON n.nid = r.nid AND r.tid = %d WHERE n.status = 1 AND h.nid IS NULL AND n.created > %d ORDER BY created";
if ($variables['comment_mode'] == COMMENT_NODE_READ_ONLY || $variables['comment_mode'] == COMMENT_NODE_DISABLED) {
$variables['icon'] = 'closed';
}
if ($variables['sticky'] == 1) {
$variables['icon'] = 'sticky';
}
}
/**
* Preprocess variables to format the next/previous forum topic navigation links.
*
* $variables contains $node.
*
* @see forum-topic-navigation.tpl.php
* @see theme_forum_topic_navigation()
*/
function template_preprocess_forum_topic_navigation(&$variables) {
$output = '';
// get previous and next topic
$sql = "SELECT n.nid, n.title, n.sticky, l.comment_count, l.last_comment_timestamp FROM {node} n INNER JOIN {node_comment_statistics} l ON n.nid = l.nid INNER JOIN {term_node} r ON n.nid = r.nid AND r.tid = %d WHERE n.status = 1 ORDER BY n.sticky DESC, ". _forum_get_topic_order_sql(variable_get('forum_order', 1));
