forum.module 35.6 KB
Newer Older
Dries's avatar
 
Dries committed
1 2 3
<?php
// $Id$

Dries's avatar
 
Dries committed
4 5 6 7 8
/**
 * @file
 * Enable threaded discussions about general topics.
 */

9 10 11
/**
 * Implementation of hook_help().
 */
12 13
function forum_help($path, $arg) {
  switch ($path) {
14 15
    case 'admin/help#forum':
      $output = '<p>'. t('The forum module lets you create threaded discussion forums for a particular topic on your site. This is similar to a message board system such as phpBB. Forums are very useful because they allow community members to discuss topics with one another, and they are archived for future reference.') .'</p>';
16 17
      $output .= '<p>'. t('Forums can be organized in containers. Containers hold forums and, in turn, forums hold threaded discussions, or threads. Both containers and forums can be nested inside other containers and forums. By carefully planning the structure of your containers and forums, you make it easier for users to find a topic of interest to them. Forum threads can be moved between forums, with an optional link (or shadow copy) created in the original forum pointing to the new location. Forum threads can have their own URL.') .'</p>';
      $output .= '<p>'. t('The forum module <strong>requires that the taxonomy and comment modules</strong> be enabled.') .'</p>';
18
      $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>';
19
      return $output;
20
    case 'admin/content/forum':
21
      return '<p>'. t('This is a list of existing containers and forums that you can edit. Containers hold forums and, in turn, forums hold threaded discussions. Both containers and forums can be placed inside other containers and forums. By carefully planning the structure of your containers and forums, you make it easier for users to find a topic of interest to them.') .'</p>';
22
    case 'admin/content/forum/add/container':
23
      return '<p>'. t('Containers help you organize your forums. The job of a container is to hold, or contain, other forums that are related. For example, a container named "Food" might hold two forums named "Fruit" and "Vegetables".') .'</p>';
24
    case 'admin/content/forum/add/forum':
25
      return '<p>'. t('A forum holds discussion topics that are related. For example, a forum named "Fruit" might contain topics titled "Apples" and "Bananas".') .'</p>';
26
    case 'admin/content/forum/settings':
27
      return '<p>'. t('These settings provide the ability to fine tune the display of your forum topics. Choose the content types to use in the forums by editing the options for the <a href="@forum_vocab">forum vocabulary</a>.', array('@forum_vocab' => url('admin/content/taxonomy/edit/vocabulary/'. variable_get('forum_nav_vocabulary', '')))) .'</p>';
Dries's avatar
 
Dries committed
28 29 30
  }
}

31 32 33 34 35
/**
 * Implementation of hook_theme()
 */
function forum_theme() {
  return array(
36
    'forums' => array(
37
      'template' => 'forums',
38 39 40
      'arguments' => array('forums' => NULL, 'topics' => NULL, 'parents' => NULL, 'tid' => NULL, 'sortby' => NULL, 'forum_per_page' => NULL),
    ),
    'forum_list' => array(
41
      'template' => 'forum-list',
42 43 44
      'arguments' => array('forums' => NULL, 'parents' => NULL, 'tid' => NULL),
    ),
    'forum_topic_list' => array(
45
      'template' => 'forum-topic-list',
46 47 48
      'arguments' => array('tid' => NULL, 'topics' => NULL, 'sortby' => NULL, 'forum_per_page' => NULL),
    ),
    'forum_icon' => array(
49
      'template' => 'forum-icon',
50 51 52
      'arguments' => array('new_posts' => NULL, 'num_posts' => 0, 'comment_mode' => 0, 'sticky' => 0),
    ),
    'forum_topic_navigation' => array(
53
      'template' => 'forum-topic-navigation',
54 55
      'arguments' => array('node' => NULL),
    ),
56
    'forum_submitted' => array(
57
      'template' => 'forum-submitted',
58 59
      'arguments' => array('topic' => NULL),
    ),
60 61 62
  );
}

63 64 65 66 67 68 69 70 71 72 73 74 75 76
/**
 * Fetch a forum term.
 *
 * @param $tid
 *   The ID of the term which should be loaded.
 *
 * @return
 *   An associative array containing the term data or FALSE if the term cannot be loaded, or is not part of the forum vocabulary.
 */
function forum_term_load($tid) {
  $result = db_query(db_rewrite_sql('SELECT t.tid, t.vid, t.name, t.description, t.weight FROM {term_data} t WHERE t.tid = %d AND t.vid = %d', 't', 'tid'), $tid, variable_get('forum_nav_vocabulary', ''));
  return db_fetch_array($result);
}

77 78 79
/**
 * Implementation of hook_menu().
 */
80 81
function forum_menu() {
  $items['forum'] = array(
82
    'title' => 'Forums',
83 84 85
    'page callback' => 'forum_page',
    'access arguments' => array('access content'),
    'type' => MENU_SUGGESTED_ITEM,
86
    'file' => 'forum.pages.inc',
87 88
  );
  $items['admin/content/forum'] = array(
89 90
    'title' => 'Forums',
    'description' => 'Control forums and their hierarchy and change forum settings.',
91 92
    'page callback' => 'drupal_get_form',
    'page arguments' => array('forum_overview'),
93
    'access arguments' => array('administer forums'),
94
    'file' => 'forum.admin.inc',
95 96
  );
  $items['admin/content/forum/list'] = array(
97
    'title' => 'List',
98 99 100 101
    'type' => MENU_DEFAULT_LOCAL_TASK,
    'weight' => -10,
  );
  $items['admin/content/forum/add/container'] = array(
102
    'title' => 'Add container',
103 104 105
    'page callback' => 'forum_form_main',
    'page arguments' => array('container'),
    'type' => MENU_LOCAL_TASK,
106
    'parent' => 'admin/content/forum',
107
    'file' => 'forum.admin.inc',
108 109
  );
  $items['admin/content/forum/add/forum'] = array(
110
    'title' => 'Add forum',
111 112 113
    'page callback' => 'forum_form_main',
    'page arguments' => array('forum'),
    'type' => MENU_LOCAL_TASK,
114
    'parent' => 'admin/content/forum',
115
    'file' => 'forum.admin.inc',
116 117
  );
  $items['admin/content/forum/settings'] = array(
118
    'title' => 'Settings',
119 120 121 122
    'page callback' => 'drupal_get_form',
    'page arguments' => array('forum_admin_settings'),
    'weight' => 5,
    'type' => MENU_LOCAL_TASK,
123
    'parent' => 'admin/content/forum',
124
    'file' => 'forum.admin.inc',
125
  );
126
  $items['admin/content/forum/edit/%forum_term'] = array(
127 128
    'page callback' => 'forum_form_main',
    'type' => MENU_CALLBACK,
129
    'file' => 'forum.admin.inc',
130
  );
131
  $items['admin/content/forum/edit/container/%forum_term'] = array(
132
    'title' => 'Edit container',
133
    'page callback' => 'forum_form_main',
134
    'page arguments' => array('container', 5),
135
    'type' => MENU_CALLBACK,
136
    'file' => 'forum.admin.inc',
137
  );
138
  $items['admin/content/forum/edit/forum/%forum_term'] = array(
139
    'title' => 'Edit forum',
140 141
    'page callback' => 'forum_form_main',
    'page arguments' => array('forum', 5),
142
    'type' => MENU_CALLBACK,
143
    'file' => 'forum.admin.inc',
144 145 146
  );
  return $items;
}
147

148 149 150 151

/**
 * Implementation of hook_init().
 */
152 153 154
function forum_init() {
  drupal_add_css(drupal_get_path('module', 'forum') .'/forum.css');
}
155

156 157 158 159 160 161 162 163 164 165 166 167 168 169
/**
 * Implementation of hook_nodeapi().
 */
function forum_nodeapi(&$node, $op, $teaser, $page) {
  $vid = variable_get('forum_nav_vocabulary', '');
  $vocabulary = taxonomy_vocabulary_load($vid);

  // Operate only on node types assigned for the forum vocabulary.
  if (!in_array($node->type, $vocabulary->nodes)) {
    return;
  }

  switch ($op) {
    case 'view':
170
      if ($page && taxonomy_node_get_terms_by_vocabulary($node, $vid) && $tree = taxonomy_get_tree($vid)) {
171
        // Get the forum terms from the (cached) tree
172 173
        foreach ($tree as $term) {
          $forum_terms[] = $term->tid;
174 175 176 177 178 179 180
        }
        foreach ($node->taxonomy as $term_id => $term) {
          if (in_array($term_id, $forum_terms)) {
            $node->tid = $term_id;
          }
        }
        // Breadcrumb navigation
181 182
        $breadcrumb[] = l(t('Home'), NULL);
        $breadcrumb[] = l($vocabulary->name, 'forum');
183 184 185
        if ($parents = taxonomy_get_parents_all($node->tid)) {
          $parents = array_reverse($parents);
          foreach ($parents as $p) {
186
            $breadcrumb[] = l($p->name, 'forum/'. $p->tid);
187 188
          }
        }
189
        drupal_set_breadcrumb($breadcrumb);
190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226

        if (!$teaser) {
          $node->content['forum_navigation'] = array(
            '#value' => theme('forum_topic_navigation', $node),
            '#weight' => 100,
          );
        }
      }
      break;

    case 'prepare':
      if (empty($node->nid)) {
        // New topic
        $node->taxonomy[arg(3)]->vid = $vid;
        $node->taxonomy[arg(3)]->tid = arg(3);
      }
      break;

    // Check in particular that only a "leaf" term in the associated taxonomy
    // vocabulary is selected, not a "container" term.
    case 'validate':
      if ($node->taxonomy) {
        // Extract the node's proper topic ID.
        $vocabulary = $vid;
        $containers = variable_get('forum_containers', array());
        foreach ($node->taxonomy as $term) {
          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.
227
    case 'presave':
228 229 230
      // Make sure all fields are set properly:
      $node->icon = !empty($node->icon) ? $node->icon : '';

231 232 233 234
      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[] = $term->tid;
235
        }
236
        foreach ($node->taxonomy as $term_id) {
237 238 239 240
          if (in_array($term_id, $forum_terms)) {
            $node->tid = $term_id;
          }
        }
241
        $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", $node->nid, 0, 1));
242 243 244
        if ($old_tid && isset($node->tid) && ($node->tid != $old_tid) && !empty($node->shadow)) {
          // A shadow copy needs to be created. Retain new term and add old term.
          $node->taxonomy[] = $old_tid;
245 246 247
        }
      }
      break;
248

249
    case 'update':
250 251 252 253 254 255 256 257
      if (!$node->revision && db_result(db_query('SELECT tid FROM {forum} WHERE nid=%d', $node->nid))) {
        if (!empty($node->tid)) {
          db_query('UPDATE {forum} SET tid = %d WHERE vid = %d', $node->tid, $node->vid);
        }
        // The node is removed from the forum.
        else {
          db_query('DELETE FROM {forum} WHERE nid = %d', $node->nid);
        }
258 259
        break;
      }
260 261
      // Deliberate no break -- for new revisions and for previously unassigned terms we need an insert.

262
    case 'insert':
263 264 265
      if (!empty($node->tid)) {
        db_query('INSERT INTO {forum} (tid, vid, nid) VALUES (%d, %d, %d)', $node->tid, $node->vid, $node->nid);
      }
266
      break;
267

268 269 270
    case 'delete':
      db_query('DELETE FROM {forum} WHERE nid = %d', $node->nid);
      break;
271

272
    case 'load':
273
      return db_fetch_array(db_query('SELECT tid AS forum_tid FROM {forum} WHERE vid = %d', $node->vid));
274 275 276
  }

  return;
277 278
}

279
/**
280
 * Implementation of hook_node_info().
281
 */
282
function forum_node_info() {
283 284
  return array(
    'forum' => array(
285
      'name' => t('Forum topic'),
286
      'module' => 'forum',
287
      'description' => t('A <em>forum topic</em> is the initial post to a new discussion thread within a forum.'),
288 289 290
      'title_label' => t('Subject'),
    )
  );
Dries's avatar
 
Dries committed
291 292
}

293 294 295
/**
 * Implementation of hook_access().
 */
296
function forum_access($op, $node, $account) {
Dries's avatar
 
Dries committed
297
  if ($op == 'create') {
298
    return user_access('create forum topics', $account);
Dries's avatar
 
Dries committed
299
  }
Dries's avatar
 
Dries committed
300 301

  if ($op == 'update' || $op == 'delete') {
302
    if (user_access('edit own forum topics', $account) && ($account->uid == $node->uid)) {
Dries's avatar
 
Dries committed
303 304 305
      return TRUE;
    }
  }
Dries's avatar
 
Dries committed
306 307
}

308 309 310
/**
 * Implementation of hook_perm().
 */
Dries's avatar
 
Dries committed
311
function forum_perm() {
312
  return array('create forum topics', 'edit own forum topics', 'administer forums');
Dries's avatar
 
Dries committed
313
}
Dries's avatar
 
Dries committed
314

315 316 317
/**
 * Implementation of hook_taxonomy().
 */
318
function forum_taxonomy($op, $type, $term = NULL) {
319
  if ($op == 'delete' && $term['vid'] == variable_get('forum_nav_vocabulary', '')) {
320 321
    switch ($type) {
      case 'term':
322
        $results = db_query('SELECT tn.nid FROM {term_node} tn WHERE tn.tid = %d', $term['tid']);
323 324 325 326 327 328 329
        while ($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.
        $containers = variable_get('forum_containers', array());
330 331
        $key = array_search($term['tid'], $containers);
        if ($key !== FALSE) {
332 333 334 335 336 337
          unset($containers[$key]);
        }
        variable_set('forum_containers', $containers);
        break;
      case 'vocabulary':
        variable_del('forum_nav_vocabulary');
Dries's avatar
 
Dries committed
338
    }
339 340
  }
}
Dries's avatar
 
Dries committed
341

342 343 344
/**
 * Implementation of hook_form_alter().
 */
345
function forum_form_alter(&$form, $form_state, $form_id) {
346
  // Hide critical options from forum vocabulary
347
  if ($form_id == 'taxonomy_form_vocabulary') {
348 349
    $vid = variable_get('forum_nav_vocabulary', '');
    if (isset($form['vid']) && $form['vid']['#value'] == $vid) {
350 351 352 353
      $form['help_forum_vocab'] = array(
        '#value' => t('This is the designated forum vocabulary. Some of the normal vocabulary options have been removed.'),
        '#weight' => -1,
      );
354
      $form['nodes']['#required'] = TRUE;
355
      $form['hierarchy'] = array('#type' => 'value', '#value' => 1);
356 357 358 359 360
      $form['settings']['required'] = array('#type' => 'value', '#value' => FALSE);
      $form['settings']['relations'] = array('#type' => 'value', '#value' => FALSE);
      $form['settings']['tags'] = array('#type' => 'value', '#value' => FALSE);
      $form['settings']['multiple'] = array('#type' => 'value', '#value' => FALSE);
      unset($form['delete']);    
361 362
    }
  }
363 364 365 366
  // Hide multiple parents select from forum terms.
  if ($form_id == 'taxonomy_form_term') {
    unset($form['advanced']['parent']);
  }
367 368 369 370 371 372
  if ($form_id == 'forum_node_form') {
    // Make the vocabulary required for 'real' forum-nodes.
    $vid = variable_get('forum_nav_vocabulary', '');
    $form['taxonomy'][$vid]['#required'] = TRUE;
    $form['taxonomy'][$vid]['#options'][''] = t('- Please choose -');
  }
373 374
}

375 376 377
/**
 * Implementation of hook_load().
 */
Dries's avatar
 
Dries committed
378
function forum_load($node) {
379
  $forum = db_fetch_object(db_query('SELECT * FROM {term_node} WHERE vid = %d', $node->vid));
Dries's avatar
 
Dries committed
380 381 382 383

  return $forum;
}

384 385 386 387 388 389
/**
 * Implementation of hook_block().
 *
 * Generates a block containing the currently active forum topics and the
 * most recently added forum topics.
 */
390 391 392
function forum_block($op = 'list', $delta = 0, $edit = array()) {
  switch ($op) {
    case 'list':
Dries's avatar
 
Dries committed
393 394
      $blocks[0]['info'] = t('Active forum topics');
      $blocks[1]['info'] = t('New forum topics');
395
      return $blocks;
Dries's avatar
 
Dries committed
396

397
    case 'configure':
398
      $form['forum_block_num_'. $delta] = array('#type' => 'select', '#title' => t('Number of topics'), '#default_value' => variable_get('forum_block_num_'. $delta, '5'), '#options' => drupal_map_assoc(array(2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)));
399
      return $form;
Dries's avatar
 
Dries committed
400

401
    case 'save':
402
      variable_set('forum_block_num_'. $delta, $edit['forum_block_num_'. $delta]);
403
      break;
Dries's avatar
 
Dries committed
404

405 406
    case 'view':
      if (user_access('access content')) {
Dries's avatar
 
Dries committed
407 408
        switch ($delta) {
          case 0:
409
            $title = t('Active forum topics');
410 411
            $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.nid = n.nid 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");
            $result = db_query_range($sql, variable_get('forum_nav_vocabulary', ''), 0, variable_get('forum_block_num_0', '5'));
412
            $content = node_title_list($result);
413
            break;
Dries's avatar
 
Dries committed
414 415

          case 1:
416
            $title = t('New forum topics');
417 418
            $sql = db_rewrite_sql("SELECT n.nid, n.title, l.comment_count FROM {node} n INNER JOIN {term_node} tn ON tn.nid = n.nid 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");
            $result = db_query_range($sql, variable_get('forum_nav_vocabulary', ''), 0, variable_get('forum_block_num_1', '5'));
419
            $content = node_title_list($result);
420
            break;
Dries's avatar
 
Dries committed
421
        }
Dries's avatar
 
Dries committed
422

423 424
        if (!empty($content)) {
          $block['subject'] = $title;
425
          $block['content'] = $content . theme('more_link', url('forum'), t('Read the latest forum topics.'));
426
          return $block;
427 428 429
        }
      }
  }
Dries's avatar
 
Dries committed
430 431
}

432 433 434
/**
 * Implementation of hook_form().
 */
435
function forum_form(&$node, $form_state) {
436
  $type = node_get_types('type', $node);
437
  $form['title'] = array('#type' => 'textfield', '#title' => check_plain($type->title_label), '#default_value' => !empty($node->title) ? $node->title : '', '#required' => TRUE, '#weight' => -5);
438

439
  if (!empty($node->nid)) {
440 441
    $vid = variable_get('forum_nav_vocabulary', '');
    $forum_terms = taxonomy_node_get_terms_by_vocabulary($node, $vid);
Dries's avatar
Dries committed
442
    // if editing, give option to leave shadows
443
    $shadow = (count($forum_terms) > 1);
444
    $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.'));
Dries's avatar
Dries committed
445
  }
Dries's avatar
 
Dries committed
446

447
  $form['body_field'] = node_body_field($node, $type->body_label, 1);
Dries's avatar
 
Dries committed
448

449 450 451
  $form['#submit'][] = 'forum_submit';
  // Assign the forum topic submit handler.

452
  return $form;
Dries's avatar
 
Dries committed
453 454
}

455
function forum_link_alter(&$links, $node) {
456
  foreach ($links as $module => $link) {
457
    if (strstr($module, 'taxonomy_term')) {
458 459
      // Link back to the forum and not the taxonomy term page. We'll only
      // do this if the taxonomy term in question belongs to forums.
460
      $tid = str_replace('taxonomy/term/', '', $link['href']);
461
      $vid = variable_get('forum_nav_vocabulary', '');
462
      $term = taxonomy_get_term($tid);
463
      if ($term->vid == $vid) {
464
        $links[$module]['href'] = str_replace('taxonomy/term', 'forum', $link['href']);
465
      }
466 467
    }
  }
468 469
}

Dries's avatar
 
Dries committed
470 471 472
/**
 * Returns a list of all forums for a given taxonomy id
 *
473
 * Forum objects contain the following fields
Dries's avatar
 
Dries committed
474 475 476 477 478 479 480 481 482
 * -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.
 */
Dries's avatar
 
Dries committed
483
function forum_get_forums($tid = 0) {
484

Dries's avatar
 
Dries committed
485
  $forums = array();
486 487
  $vid = variable_get('forum_nav_vocabulary', '');
  $_forums = taxonomy_get_tree($vid, $tid);
Dries's avatar
 
Dries committed
488

Dries's avatar
 
Dries committed
489
  if (count($_forums)) {
Dries's avatar
 
Dries committed
490

Dries's avatar
 
Dries committed
491 492
    $counts = array();

493
    $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.nid = r.nid WHERE n.status = 1 GROUP BY r.tid";
494
    $sql = db_rewrite_sql($sql);
495
    $_counts = db_query($sql);
Dries's avatar
 
Dries committed
496 497 498
    while ($count = db_fetch_object($_counts)) {
      $counts[$count->tid] = $count;
    }
Dries's avatar
 
Dries committed
499
  }
Dries's avatar
 
Dries committed
500

Dries's avatar
 
Dries committed
501 502 503 504
  foreach ($_forums as $forum) {
    if (in_array($forum->tid, variable_get('forum_containers', array()))) {
      $forum->container = 1;
    }
Dries's avatar
 
Dries committed
505

506
    if (!empty($counts[$forum->tid])) {
Dries's avatar
 
Dries committed
507 508 509 510 511 512 513 514 515 516
      $forum->num_topics = $counts[$forum->tid]->topic_count;
      $forum->num_posts = $counts[$forum->tid]->topic_count + $counts[$forum->tid]->comment_count;
    }
    else {
      $forum->num_topics = 0;
      $forum->num_posts = 0;
    }

    // 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
Dries's avatar
 
Dries committed
517
    // used to join node_comment_statistics to users.
518
    $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";
519
    $sql = db_rewrite_sql($sql);
Dries's avatar
 
Dries committed
520
    $topic = db_fetch_object(db_query_range($sql, $forum->tid, 0, 1));
521

522
    $last_post = new stdClass();
523 524 525 526 527
    if (!empty($topic->last_comment_timestamp)) {
      $last_post->timestamp = $topic->last_comment_timestamp;
      $last_post->name = $topic->last_comment_name;
      $last_post->uid = $topic->last_comment_uid;
    }
Dries's avatar
 
Dries committed
528
    $forum->last_post = $last_post;
Dries's avatar
 
Dries committed
529

Dries's avatar
 
Dries committed
530 531 532 533
    $forums[$forum->tid] = $forum;
  }

  return $forums;
Dries's avatar
 
Dries committed
534 535
}

536 537 538 539 540
/**
 * Calculate the number of nodes the user has not yet read and are newer
 * than NODE_NEW_LIMIT.
 */
function _forum_topics_unread($term, $uid) {
541
  $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";
542
  $sql = db_rewrite_sql($sql);
543
  return db_result(db_query($sql, $term, $uid, NODE_NEW_LIMIT));
Dries's avatar
 
Dries committed
544 545
}

Dries's avatar
Dries committed
546
function forum_get_topics($tid, $sortby, $forum_per_page) {
Dries's avatar
 
Dries committed
547
  global $user, $forum_topic_list_header;
Dries's avatar
 
Dries committed
548

Dries's avatar
 
Dries committed
549
  $forum_topic_list_header = array(
550
    array('data' => '&nbsp;', 'field' => NULL),
Dries's avatar
 
Dries committed
551
    array('data' => t('Topic'), 'field' => 'n.title'),
Dries's avatar
 
Dries committed
552
    array('data' => t('Replies'), 'field' => 'l.comment_count'),
Dries's avatar
 
Dries committed
553
    array('data' => t('Created'), 'field' => 'n.created'),
Dries's avatar
 
Dries committed
554
    array('data' => t('Last reply'), 'field' => 'l.last_comment_timestamp'),
Dries's avatar
 
Dries committed
555
  );
Dries's avatar
 
Dries committed
556

Dries's avatar
 
Dries committed
557
  $order = _forum_get_topic_order($sortby);
Dries's avatar
 
Dries committed
558
  for ($i = 0; $i < count($forum_topic_list_header); $i++) {
Dries's avatar
 
Dries committed
559 560
    if ($forum_topic_list_header[$i]['field'] == $order['field']) {
      $forum_topic_list_header[$i]['sort'] = $order['sort'];
Dries's avatar
 
Dries committed
561 562 563 564
    }
  }

  $term = taxonomy_get_term($tid);
Dries's avatar
 
Dries committed
565

566
  $sql = db_rewrite_sql("SELECT n.nid, r.tid, n.title, 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");
Dries's avatar
 
Dries committed
567
  $sql .= tablesort_sql($forum_topic_list_header, 'n.sticky DESC,');
568
  $sql .= ', n.created DESC';  // Always add a secondary sort order so that the news forum topics are on top.
Dries's avatar
Dries committed
569

570
  $sql_count = db_rewrite_sql("SELECT COUNT(n.nid) FROM {node} n INNER JOIN {term_node} r ON n.nid = r.nid AND r.tid = %d WHERE n.status = 1");
Dries's avatar
 
Dries committed
571

Steven Wittens's avatar
Steven Wittens committed
572
  $result = pager_query($sql, $forum_per_page, 0, $sql_count, $tid);
573
  $topics = array();
Dries's avatar
 
Dries committed
574
  while ($topic = db_fetch_object($result)) {
Dries's avatar
Dries committed
575 576
    if ($user->uid) {
      // folder is new if topic is new or there are new comments since last visit
Dries's avatar
 
Dries committed
577
      if ($topic->tid != $tid) {
Dries's avatar
Dries committed
578
        $topic->new = 0;
Dries's avatar
 
Dries committed
579 580
      }
      else {
Dries's avatar
 
Dries committed
581
        $history = _forum_user_last_visit($topic->nid);
Dries's avatar
 
Dries committed
582
        $topic->new_replies = comment_num_new($topic->nid, $history);
583
        $topic->new = $topic->new_replies || ($topic->timestamp > $history);
Dries's avatar
 
Dries committed
584
      }
585 586
    }
    else {
587
      // Do not track "new replies" status for topics if the user is anonymous.
Dries's avatar
Dries committed
588 589
      $topic->new_replies = 0;
      $topic->new = 0;
590
    }
Dries's avatar
 
Dries committed
591

Dries's avatar
 
Dries committed
592
    if ($topic->num_comments > 0) {
593
      $last_reply = new stdClass();
Dries's avatar
 
Dries committed
594 595 596 597 598
      $last_reply->timestamp = $topic->last_comment_timestamp;
      $last_reply->name = $topic->last_comment_name;
      $last_reply->uid = $topic->last_comment_uid;
      $topic->last_reply = $last_reply;
    }
Dries's avatar
 
Dries committed
599 600 601
    $topics[] = $topic;
  }

Dries's avatar
Dries committed
602
  return $topics;
Dries's avatar
 
Dries committed
603 604
}

Dries's avatar
 
Dries committed
605 606 607
/**
 * Finds the first unread node for a given forum.
 */
Dries's avatar
Dries committed
608
function _forum_new($tid) {
Dries's avatar
 
Dries committed
609 610
  global $user;

611
  $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";
612
  $sql = db_rewrite_sql($sql);
Dries's avatar
 
Dries committed
613
  $nid = db_result(db_query_range($sql, $user->uid, $tid, NODE_NEW_LIMIT, 0, 1));
Dries's avatar
 
Dries committed
614 615 616 617

  return $nid ? $nid : 0;
}

Dries's avatar
 
Dries committed
618
/**
619
 * Process variables for forums.tpl.php
620 621 622 623 624 625 626 627
 *
 * The $variables array contains the following arguments:
 * - $forums
 * - $topics
 * - $parents
 * - $tid
 * - $sortby
 * - $forum_per_page
Dries's avatar
 
Dries committed
628
 *
629
 * @see forums.tpl.php
Dries's avatar
 
Dries committed
630
 */
631
function template_preprocess_forums(&$variables) {
Dries's avatar
 
Dries committed
632
  global $user;
Dries's avatar
 
Dries committed
633

634 635
  $vid = variable_get('forum_nav_vocabulary', '');
  $vocabulary = taxonomy_vocabulary_load($vid);
636
  $title = !empty($vocabulary->name) ? $vocabulary->name : '';
Dries's avatar
 
Dries committed
637

Dries's avatar
 
Dries committed
638
  // Breadcrumb navigation:
639
  $breadcrumb[] = l(t('Home'), NULL);
640
  if ($variables['tid']) {
641
    $breadcrumb[] = l($vocabulary->name, 'forum');
Dries's avatar
 
Dries committed
642
  }
643 644 645 646
  if ($variables['parents']) {
    $variables['parents'] = array_reverse($variables['parents']);
    foreach ($variables['parents'] as $p) {
      if ($p->tid == $variables['tid']) {
647
        $title = $p->name;
Dries's avatar
 
Dries committed
648 649
      }
      else {
650
        $breadcrumb[] = l($p->name, 'forum/'. $p->tid);
Dries's avatar
 
Dries committed
651 652 653
      }
    }
  }
654
  drupal_set_breadcrumb($breadcrumb);
Dries's avatar
Dries committed
655
  drupal_set_title(check_plain($title));
656

657
  if ($variables['forums_defined'] = count($variables['forums']) || count($variables['parents'])) {
658 659 660 661 662 663 664 665 666
    // Format the "post new content" links listing.
    $forum_types = array();

    // Loop through all node types for forum vocabulary.
    foreach ($vocabulary->nodes as $type) {
      // Check if the current user has the 'create' permission for this node type.
      if (node_access('create', $type)) {
        // Fetch the "General" name of the content type;
        // Push the link with title and url to the array.
667
        $forum_types[$type] = array('title' => t('Post new @node_type', array('@node_type' => node_get_types('name', $type))), 'href' => "node/add/$type/$variables[tid]");
668
      }
Dries's avatar
 
Dries committed
669
    }
670

671
    if (empty($forum_types)) {
672 673
      // The user is logged-in; but denied access to create any new forum content type.
      if ($user->uid) {
674
        $forum_types['disallowed'] = array('title' => t('You are not allowed to post new content in forum.'));
675 676 677
      }
      // The user is not logged-in; and denied access to create any new forum content type.
      else {
678
        $forum_types['login'] = array('title' => t('<a href="@login">Login</a> to post new content in forum.', array('@login' => url('user/login', array('query' => drupal_get_destination())))), 'html' => TRUE);
679
      }
Dries's avatar
 
Dries committed
680
    }
681
    $variables['links'] = $forum_types;
Dries's avatar
 
Dries committed
682

683 684 685 686 687 688
    if (!empty($variables['forums'])) {
      $variables['forums'] = theme('forum_list', $variables['forums'], $variables['parents'], $variables['tid']);
    }
    else {
      $variables['forums'] = '';
    }
Dries's avatar
 
Dries committed
689

690 691 692
    if ($variables['tid'] && !in_array($variables['tid'], variable_get('forum_containers', array()))) {
      $variables['topics'] = theme('forum_topic_list', $variables['tid'], $variables['topics'], $variables['sortby'], $variables['forum_per_page']);
      drupal_add_feed(url('taxonomy/term/'. $variables['tid'] .'/0/feed'), 'RSS - '. $title);
Dries's avatar
 
Dries committed
693
    }
694 695 696 697 698
    else {
      $variables['topics'] = '';
    }

    // Provide separate template suggestions based on what's being output. Topic id is also accounted for.
699
    // Check both variables to be safe then the inverse. Forums with topic ID's take precedence.
700
    if ($variables['forums'] && !$variables['topics']) {
701
      $variables['template_files'][] = 'forums-containers';
702
      $variables['template_files'][] = 'forums-'. $variables['tid'];
703
      $variables['template_files'][] = 'forums-containers-'. $variables['tid'];
704
    }
705
    elseif (!$variables['forums'] && $variables['topics']) {
706
      $variables['template_files'][] = 'forums-topics';
707
      $variables['template_files'][] = 'forums-'. $variables['tid'];
708
      $variables['template_files'][] = 'forums-topics-'. $variables['tid'];
709
    }
710 711 712
    else {
      $variables['template_files'][] = 'forums-'. $variables['tid'];
    }
713

Dries's avatar
 
Dries committed
714 715
  }
  else {
716
    drupal_set_title(t('No forums defined'));
717 718 719
    $variables['links'] = array();
    $variables['forums'] = '';
    $variables['topics'] = '';
Dries's avatar
 
Dries committed
720 721 722
  }
}

Dries's avatar
 
Dries committed
723
/**
724
 * Process variables to format a forum listing.
Dries's avatar
 
Dries committed
725
 *
726 727 728 729 730 731 732
 * $variables contains the following information:
 * - $forums
 * - $parents
 * - $tid
 *
 * @see forum-list.tpl.php
 * @see theme_forum_list()
Dries's avatar
 
Dries committed
733
 */
734
function template_preprocess_forum_list(&$variables) {
Dries's avatar
 
Dries committed
735
  global $user;
736
  $row = 0;
737 738 739 740 741 742
  // Sanitize each forum so that the template can safely print the data.
  foreach ($variables['forums'] as $id => $forum) {
    $variables['forums'][$id]->description = !empty($forum->description) ? filter_xss_admin($forum->description) : '';
    $variables['forums'][$id]->link = url("forum/$forum->tid");
    $variables['forums'][$id]->name = check_plain($forum->name);
    $variables['forums'][$id]->is_container = !empty($forum->container);
743 744 745 746 747 748 749
    $variables['forums'][$id]->zebra = $row % 2 == 0 ? 'odd' : 'even';
    $row++;

    $variables['forums'][$id]->new_text = '';
    $variables['forums'][$id]->new_url = '';
    $variables['forums'][$id]->new_topics = 0;
    $variables['forums'][$id]->old_topics = $forum->num_topics;
750 751 752
    if ($user->uid) {
      $variables['forums'][$id]->new_topics = _forum_topics_unread($forum->tid, $user->uid);
      if ($variables['forums'][$id]->new_topics) {
753
        $variables['forums'][$id]->new_text = t('!count new', array('!count' => $variables['forums'][$id]->new_topics));
754
        $variables['forums'][$id]->new_url = url("forum/$forum->tid", array('fragment' => 'new'));
Dries's avatar
 
Dries committed
755
      }
756
      $variables['forums'][$id]->old_topics = $forum->num_topics - $variables['forums'][$id]->new_topics;
Dries's avatar
 
Dries committed
757
    }
758
    $variables['forums'][$id]->last_reply = theme('forum_submitted', $forum->last_post);
Dries's avatar
 
Dries committed
759
  }
760 761 762
  // Give meaning to $tid for themers. $tid actually stands for term id.
  $variables['forum_id'] = $variables['tid'];
  unset($variables['tid']);
Dries's avatar
 
Dries committed
763 764
}

Dries's avatar
 
Dries committed
765
/**
766 767 768 769 770 771 772
 * Preprocess variables to format the topic listing.
 *
 * $variables contains the following data:
 * - $tid
 * - $topics
 * - $sortby
 * - $forum_per_page
Dries's avatar
 
Dries committed
773
 *
774 775
 * @see forum-topic-list.tpl.php
 * @see theme_forum_topic_list()
Dries's avatar
 
Dries committed
776
 */
777
function template_preprocess_forum_topic_list(&$variables) {
Dries's avatar
 
Dries committed
778
  global $forum_topic_list_header;
Dries's avatar
 
Dries committed
779