forum.module 40.2 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 12
/**
 * Implementation of hook_help().
 */
function forum_help($section) {
Dries's avatar
Dries committed
13
  switch ($section) {
14 15 16 17 18 19 20 21 22 23 24 25
    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>';
      $output .= '<p>'. t('Forums can be organized under what are called <em>containers</em>. Containers hold forums and, in turn, forums hold threaded discussions. Both containers and forums can be placed inside other containers and forums. By planning the structure of your containers and forums well, you make it easier for users to find a topic area of interest to them.  Forum topics can be moved by selecting a different forum and can be left in the existing forum by selecting <em>leave a shadow copy</em>.  Forum topics can also have their own URL.') .'</p>';
      $output .= '<p>'. t('Forums module <strong>requires Taxonomy and Comments module</strong> be enabled.') .'</p>';
      $output .= t('<p>You can</p>
<ul>
<li>administer forums at <a href="%admin-forum">administer &gt;&gt; forums</a>.</li>
<li>enable the required comment and taxonomy modules at <a href="%admin-modules">administer &gt;&gt; modules</a>.</li>
<li>read about the comment module at <a href="%admin-help-comment">administer &gt;&gt; help &gt;&gt; comment</a>.</li>
<li>read about the taxonomy module at <a href="%admin-help-taxonomy">administer &gt;&gt; help &gt;&gt; taxonomy</a>.</li>
</ul>
', array('%admin-forum' => url('admin/forum'), '%admin-modules' => url('admin/modules'), '%admin-help-comment' => url('admin/help/comment'), '%admin-help-taxonomy' => url('admin/help/taxonomy')));
26
      $output .= '<p>'. t('For more information please read the configuration and customization handbook <a href="%forum">Forum page</a>.', array('%forum' => 'http://drupal.org/handbook/modules/forum/')) .'</p>';
27 28 29
      return $output;
    case 'admin/modules#description':
      return t('Enables threaded discussions about general topics.');
30
    case 'admin/forum':
31
      return t('<p>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 planning the structure of your containers and forums well, you make it easier for users to find a topic area of interest to them.</p>');
32
    case 'admin/forum/add/container':
33
      return t('<p>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>');
34
    case 'admin/forum/add/forum':
35
      return t('<p>A forum holds discussion topics that are related. For example, a forum named "Fruit" might contain topics titled "Apples" and "Bananas".</p>');
36 37
    case 'admin/forum/configure':
      return t('This is where you can configure system-wide options for how your forums act and display.');
Dries's avatar
Dries committed
38
    case 'node/add#forum':
39
      return t('Create a new topic for discussion in the forums.');
Dries's avatar
Dries committed
40 41 42
  }
}

43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105
/**
 * Implementation of hook_menu().
 */
function forum_menu($may_cache) {
  $items = array();

  if ($may_cache) {
    $items[] = array('path' => 'node/add/forum',
      'title' => t('forum topic'),
      'access' => user_access('create forum topics'));
    $items[] = array('path' => 'forum',
      'title' => t('forums'),
      'callback' => 'forum_page',
      'access' => user_access('access content'),
      'type' => MENU_SUGGESTED_ITEM);
    $items[] = array('path' => 'admin/forum',
      'title' => t('forums'),
      'callback' => 'forum_overview',
      'access' => user_access('administer forums'),
      'type' => MENU_NORMAL_ITEM);
    $items[] = array('path' => 'admin/forum/list',
      'title' => t('list'),
      'access' => user_access('administer forums'),
      'type' => MENU_DEFAULT_LOCAL_TASK,
      'weight' => -10);
    $items[] = array('path' => 'admin/forum/add/container',
      'title' => t('add container'),
      'callback' => 'forum_form_container',
      'access' => user_access('administer forums'),
      'type' => MENU_LOCAL_TASK);
    $items[] = array('path' => 'admin/forum/add/forum',
      'title' => t('add forum'),
      'callback' => 'forum_form_forum',
      'access' => user_access('administer forums'),
      'type' => MENU_LOCAL_TASK);
    $items[] = array('path' => 'admin/forum/configure',
      'title' => t('configure'),
      'callback' => 'forum_admin_configure',
      'access' => user_access('administer forums'),
      'type' => MENU_LOCAL_TASK);
  }
  elseif (is_numeric(arg(4))) {
    $term = taxonomy_get_term(arg(4));
    // Check if this is a valid term.
    if ($term) {
      $items[] = array('path' => 'admin/forum/edit/container',
        'title' => t('edit container'),
        'callback' => 'forum_form_container',
        'callback arguments' => array((array)$term),
        'access' => user_access('administer forums'),
        'type' => MENU_CALLBACK);
      $items[] = array('path' => 'admin/forum/edit/forum',
        'title' => t('edit forum'),
        'callback' => 'forum_form_forum',
        'callback arguments' => array((array)$term),
        'access' => user_access('administer forums'),
        'type' => MENU_CALLBACK);
    }
  }

  return $items;
}

106
/**
107
 * Implementation of hook_node_info().
108
 */
109
function forum_node_info() {
110
  return array('forum' => array('name' => t('forum topic'), 'base' => 'forum'));
Dries's avatar
Dries committed
111 112
}

113 114 115
/**
 * Implementation of hook_access().
 */
Dries's avatar
Dries committed
116
function forum_access($op, $node) {
Dries's avatar
Dries committed
117 118
  global $user;

Dries's avatar
Dries committed
119 120
  if ($op == 'create') {
    return user_access('create forum topics');
Dries's avatar
Dries committed
121
  }
Dries's avatar
Dries committed
122 123 124 125 126 127

  if ($op == 'update' || $op == 'delete') {
    if (user_access('edit own forum topics') && ($user->uid == $node->uid)) {
      return TRUE;
    }
  }
Dries's avatar
Dries committed
128 129
}

130 131 132
/**
 * Implementation of hook_perm().
 */
Dries's avatar
Dries committed
133
function forum_perm() {
134
  return array('create forum topics', 'edit own forum topics', 'administer forums');
Dries's avatar
Dries committed
135
}
Dries's avatar
Dries committed
136

137 138 139 140 141
/**
 * Implementation of hook_nodeapi().
 */
function forum_nodeapi(&$node, $op, $teaser, $page) {
  switch ($op) {
142
    case 'delete revision':
143 144 145 146 147
      db_query('DELETE FROM {forum} WHERE vid = %d', $node->vid);
      break;
  }
}

148 149 150
/**
 * Implementation of hook_taxonomy().
 */
151
function forum_taxonomy($op, $type, $term = NULL) {
152
  if ($op == 'delete' && $term['vid'] == _forum_get_vid()) {
153 154
    switch ($type) {
      case 'term':
155
        $results = db_query('SELECT f.nid FROM {forum} f WHERE f.tid = %d', $term['tid']);
156 157 158 159 160 161 162
        while ($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.
        $containers = variable_get('forum_containers', array());
163
        if ($key = array_search($term['tid'], $containers)) {
164 165 166 167 168 169
          unset($containers[$key]);
        }
        variable_set('forum_containers', $containers);
        break;
      case 'vocabulary':
        variable_del('forum_nav_vocabulary');
Dries's avatar
Dries committed
170
    }
171 172
  }
}
Dries's avatar
Dries committed
173

174 175 176
/**
 * Implementation of hook_settings
 */
177
function forum_admin_configure() {
178

179
  $form = array();
180
  $number = drupal_map_assoc(array(5, 10, 15, 20, 25, 30, 35, 40, 50, 60, 80, 100, 150, 200, 250, 300, 350, 400, 500));
181 182 183 184 185 186
  $form['forum_hot_topic'] = array('#type' => 'select',
    '#title' => t('Hot topic threshold'),
    '#default_value' => variable_get('forum_hot_topic', 15),
    '#options' => $number,
    '#description' => t('The number of posts a topic must have to be considered hot.'),
  );
187
  $number = drupal_map_assoc(array(10, 25, 50, 75, 100));
188 189 190 191 192 193
  $form['forum_per_page'] = array('#type' => 'select',
    '#title' => t('Topics per page'),
    '#default_value' => variable_get('forum_per_page', 25),
    '#options' => $number,
    '#description' => t('The default number of topics displayed per page; links to browse older messages are automatically being displayed.'),
  );
194
  $forder = array(1 => t('Date - newest first'), 2 => t('Date - oldest first'), 3 => t('Posts - most active first'), 4=> t('Posts - least active first'));
195 196 197 198 199 200
  $form['forum_order'] = array('#type' => 'radios',
    '#title' => t('Default order'),
    '#default_value' => variable_get('forum_order', '1'),
    '#options' => $forder,
    '#description' => t('The default display order for topics.'),
  );
201

202
  return system_settings_form('forum_admin_configure', $form);
203 204
}

205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228
/**
 * Implementation of hook_form_alter().
 */
function forum_form_alter($form_id, &$form) {
  // hide critical options from forum vocabulary
  if ($form_id == 'taxonomy_form_vocabulary') {
    if ($form['vid']['#value'] == _forum_get_vid()) {
      $form['help_forum_vocab'] = array(
        '#value' => t('This is the designated forum vocabulary. Some of the normal vocabulary options have been removed.'),
        '#weight' => -1,
      );
      $form['nodes']['forum'] = array('#type' => 'checkbox', '#value' => 1, '#title' => t('forum topic'), '#attributes' => array('disabled' => '' ), '#description' => t('forum topic is affixed to the forum vocabulary.'));
      $form['hierarchy'] = array('#type' => 'value', '#value' => 1);
      unset($form['relations']);
      unset($form['tags']);
      unset($form['multiple']);
      $form['required'] = array('#type' => 'value', '#value' => 1);
    }
    else {
      unset($form['nodes']['forum']);
    }
  }
}

229 230 231
/**
 * Implementation of hook_load().
 */
Dries's avatar
Dries committed
232
function forum_load($node) {
233
  $forum = db_fetch_object(db_query('SELECT * FROM {forum} WHERE vid = %d', $node->vid));
Dries's avatar
Dries committed
234 235 236 237

  return $forum;
}

238 239 240 241 242 243
/**
 * Implementation of hook_block().
 *
 * Generates a block containing the currently active forum topics and the
 * most recently added forum topics.
 */
244 245 246
function forum_block($op = 'list', $delta = 0, $edit = array()) {
  switch ($op) {
    case 'list':
Dries's avatar
Dries committed
247 248
      $blocks[0]['info'] = t('Active forum topics');
      $blocks[1]['info'] = t('New forum topics');
249
      return $blocks;
Dries's avatar
Dries committed
250

251
    case 'configure':
252
      $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)));
253
      return $form;
Dries's avatar
Dries committed
254

255
    case 'save':
256
      variable_set('forum_block_num_'. $delta, $edit['forum_block_num_'. $delta]);
257
      break;
Dries's avatar
Dries committed
258

259 260
    case 'view':
      if (user_access('access content')) {
Dries's avatar
Dries committed
261 262
        switch ($delta) {
          case 0:
263
            $title = t('Active forum topics');
264
            $sql = db_rewrite_sql("SELECT n.nid, n.title, l.comment_count FROM {node} n INNER JOIN {node_comment_statistics} l ON n.nid = l.nid WHERE n.status = 1 AND n.type = 'forum' ORDER BY l.last_comment_timestamp DESC");
265 266 267 268
            $result = db_query_range($sql, 0, variable_get('forum_block_num_0', '5'));
            if (db_num_rows($result)) {
              $content = node_title_list($result);
            }
269
            break;
Dries's avatar
Dries committed
270 271

          case 1:
272 273
            $title = t('New forum topics');
            $sql = db_rewrite_sql("SELECT n.nid, n.title, l.comment_count FROM {node} n INNER JOIN {node_comment_statistics} l ON n.nid = l.nid WHERE n.type = 'forum' AND n.status = 1 ORDER BY n.nid DESC");
274 275 276 277
            $result = db_query_range($sql, 0, variable_get('forum_block_num_1', '5'));
            if (db_num_rows($result)) {
              $content = node_title_list($result);
            }
278
            break;
Dries's avatar
Dries committed
279
        }
Dries's avatar
Dries committed
280

281
        if ($content) {
282
          $content .= '<div class="more-link">'. l(t('more'), 'forum', array('title' => t('Read the latest forum topics.'))) .'</div>';
283 284
        }

Dries's avatar
Dries committed
285
        $block['subject'] = $title;
286 287 288 289 290
        $block['content'] = $content;

        return $block;
      }
  }
Dries's avatar
Dries committed
291 292
}

293 294 295
/**
 * Implementation of hook_view().
 */
Dries's avatar
Dries committed
296
function forum_view(&$node, $teaser = FALSE, $page = FALSE) {
Dries's avatar
Dries committed
297
  if ($page) {
Dries's avatar
Dries committed
298
    $vocabulary = taxonomy_get_vocabulary(variable_get('forum_nav_vocabulary', ''));
Dries's avatar
Dries committed
299
    // Breadcrumb navigation
Dries's avatar
Dries committed
300 301
    $breadcrumb = array();
    $breadcrumb[] = array('path' => 'forum', 'title' => $vocabulary->name);
Dries's avatar
Dries committed
302
    if ($parents = taxonomy_get_parents_all($node->tid)) {
Dries's avatar
Dries committed
303 304
      $parents = array_reverse($parents);
      foreach ($parents as $p) {
Dries's avatar
Dries committed
305
        $breadcrumb[] = array('path' => 'forum/'. $p->tid, 'title' => $p->name);
Dries's avatar
Dries committed
306 307
      }
    }
Dries's avatar
Dries committed
308 309
    $breadcrumb[] = array('path' => 'node/'. $node->nid);
    menu_set_location($breadcrumb);
310
  }
Dries's avatar
Dries committed
311

312
  $node = node_prepare($node, $teaser);
313 314

  $node->body .= theme('forum_topic_navigation', $node);
Dries's avatar
Dries committed
315 316
}

317
/**
318
 * Implementation of hook_submit().
319 320 321 322
 *
 * Check in particular that only a "leaf" term in the associated taxonomy
 * vocabulary is selected, not a "container" term.
 */
323
function forum_submit(&$node) {
324
  // Make sure all fields are set properly:
Dries's avatar
Dries committed
325
  $node->icon = $node->icon ? $node->icon : '';
Dries's avatar
Dries committed
326 327 328

  if ($node->taxonomy) {
    // Extract the node's proper topic ID.
Dries's avatar
Dries committed
329
    $vocabulary = variable_get('forum_nav_vocabulary', '');
Dries's avatar
Dries committed
330
    foreach ($node->taxonomy as $term) {
Dries's avatar
Dries committed
331
      if (db_result(db_query('SELECT COUNT(*) FROM {term_data} WHERE tid = %d AND vid = %d', $term, $vocabulary))) {
332
        $node->tid = $term;
Dries's avatar
Dries committed
333
      }
334
    }
Dries's avatar
Dries committed
335
    if ($node->tid && $node->shadow) {
336
      // A shadow copy needs to be created. Retain existing term and add new term.
337
      $terms = array_keys(taxonomy_node_get_terms($node->nid));
338
      if (!in_array($node->tid, $terms)) {
Dries's avatar
Dries committed
339 340 341 342
        $terms[] = $node->tid;
      }
      $node->taxonomy = $terms;
    }
Dries's avatar
Dries committed
343 344 345
  }
}

346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367
/**
 * Implementation of hook_validate().
 *
 * Check in particular that only a "leaf" term in the associated taxonomy
 * vocabulary is selected, not a "container" term.
 */
function forum_validate($node) {
  if ($node->taxonomy) {
    // Extract the node's proper topic ID.
    $vocabulary = variable_get('forum_nav_vocabulary', '');
    $containers = variable_get('forum_containers', array());
    foreach ($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' => theme('placeholder', $term->name))));
        }
      }
    }
  }
}

Dries's avatar
Dries committed
368 369 370 371
/**
 * Implementation of hook_update().
 */
function forum_update($node) {
372 373 374 375 376 377
  if ($node->is_new || $node->revision) {
    db_query("INSERT INTO {forum} (nid, vid, tid) VALUES (%d, %d, %d)", $node->nid, $node->vid, $node->tid);
  }
  else {
    db_query('UPDATE {forum} SET tid = %d WHERE vid = %d', $node->tid, $node->vid);
  }
Dries's avatar
Dries committed
378 379
}

380 381 382
/**
 * Implementation of hook_form().
 */
Dries's avatar
Dries committed
383
function forum_form(&$node) {
384
  $form['title'] = array('#type' => 'textfield', '#title' => t('Subject'), '#default_value' => $node->title, '#required' => TRUE, '#weight' => -5);
385

386
  if ($node->nid) {
387
    $forum_terms = taxonomy_node_get_terms_by_vocabulary(_forum_get_vid(), $node->nid);
Dries's avatar
Dries committed
388
    // if editing, give option to leave shadows
389
    $shadow = (count($forum_terms) > 1);
390
    $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
391
  }
Dries's avatar
Dries committed
392

393
  $form['body_filter']['body'] = array('#type' => 'textarea', '#title' => t('Body'), '#default_value' => $node->body, '#rows' => 20, '#required' => TRUE);
394
  $form['body_filter']['format'] = filter_form($node->format);
Dries's avatar
Dries committed
395

396
  return $form;
Dries's avatar
Dries committed
397 398
}

399 400 401 402 403 404
/**
 * Implementation of hook_prepare; assign forum taxonomy when adding a topic from within a forum.
 */
function forum_prepare(&$node) {
  if (!$node->nid) {
    // new topic
405 406
    $node->taxonomy[arg(3)]->vid = _forum_get_vid();
    $node->taxonomy[arg(3)]->tid = arg(3);
407 408 409
  }
}

410 411 412
/**
 * Implementation of hook_insert().
 */
Dries's avatar
Dries committed
413
function forum_insert($node) {
414
  db_query('INSERT INTO {forum} (nid, vid, tid) VALUES (%d, %d, %d)', $node->nid, $node->vid, $node->tid);
Dries's avatar
Dries committed
415 416
}

417 418 419
/**
 * Implementation of hook_delete().
 */
Dries's avatar
Dries committed
420
function forum_delete(&$node) {
Dries's avatar
Dries committed
421
  db_query('DELETE FROM {forum} WHERE nid = %d', $node->nid);
Dries's avatar
Dries committed
422
}
Dries's avatar
Dries committed
423

424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553
/**
 * Returns a form for adding a container to the forum vocabulary
 *
 * @param $edit Associative array containing a container term to be added or edited.
 */
function forum_form_container($edit = array()) {
  // Handle a delete operation.
  if ($_POST['op'] == t('Delete') || $_POST['edit']['confirm']) {
    return _forum_confirm_delete($edit['tid']);
  }

  $form['name'] = array(
    '#title' => t('Container name'),
    '#type' => 'textfield',
    '#default_value' => $edit['name'],
    '#maxlength' =>  64,
    '#description' => t('The container name is used to identify related forums.'),
    '#required' => TRUE
  );

  $form['description'] = array(
    '#type' => 'textarea',
    '#title' => t('Description'),
    '#default_value' => $edit['description'],
    '#description' => t('The container description can give users more information about the forums it contains.')
  );
  $form['parent']['#tree'] = TRUE;
  $form['parent'][0] = _forum_parent_select($edit['tid'], t('Parent'), 'container');
  $form['weight'] = array('#type' => 'weight',
    '#title' => t('Weight'),
    '#default_value' => $edit['weight'],
    '#description' => t('When listing containers, those with with light (small) weights get listed before containers with heavier (larger) weights. Containers with equal weights are sorted alphabetically.')
  );

  $form['vid'] = array('#type' => 'hidden',
    '#value' => _forum_get_vid());
  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Submit')
  );
  if ($edit['tid']) {
    $form['delete'] = array('#type' => 'submit', '#value' => t('Delete'));
    $form['tid'] = array('#type' => 'value', '#value' => $edit['tid']);
  }

  return drupal_get_form('forum_form_container', $form, 'forum_form');
}

/**
 * Returns a form for adding a forum to the forum vocabulary
 *
 * @param $edit Associative array containing a forum term to be added or edited.
 */
function forum_form_forum($edit = array()) {
  // Handle a delete operation.
  if ($_POST['op'] == t('Delete') || $_POST['edit']['confirm']) {
    return _forum_confirm_delete($edit['tid']);
  }

  $form['name'] = array('#type' => 'textfield',
    '#title' => t('Forum name'),
    '#default_value' => $edit['name'],
    '#maxlength' =>  64,
    '#description' => t('The forum name is used to identify related discussions.'),
    '#required' => TRUE,
  );
  $form['description'] = array('#type' => 'textarea',
    '#title' => t('Description'),
    '#default_value' => $edit['description'],
    '#description' => t('The forum description can give users more information about the discussion topics it contains.'),
  );
  $form['parent']['#tree'] = TRUE;
  $form['parent'][0] = _forum_parent_select($edit['tid'], t('Parent'), 'forum');
  $form['weight'] = array('#type' => 'weight',
    '#title' => t('Weight'),
    '#default_value' => $edit['weight'],
    '#description' => t('When listing forums, those with lighter (smaller) weights get listed before containers with heavier (larger) weights. Forums with equal weights are sorted alphabetically.'),
  );

  $form['vid'] = array('#type' => 'hidden', '#value' => _forum_get_vid());
  $form['submit' ] = array('#type' => 'submit', '#value' => t('Submit'));
  if ($edit['tid']) {
    $form['delete'] = array('#type' => 'submit', '#value' => t('Delete'));
    $form['tid'] = array('#type' => 'hidden', '#value' => $edit['tid']);
  }

  return drupal_get_form('forum_form_forum', $form, 'forum_form');
}

/**
 * Process forum form and container form submissions.
 */
function forum_form_submit($form_id, $form_values) {
  if ($form_id == 'forum_form_container') {
    $container = TRUE;
    $type = t('forum container');
  }
  else {
    $container = false;
    $type = t('forum');
  }

  $status = taxonomy_save_term($form_values);
  switch ($status) {
    case SAVED_NEW:
      if ($container) {
        $containers = variable_get('forum_containers', array());
        $containers[] = $form_values['tid'];
        variable_set('forum_containers', $containers);
      }
      drupal_set_message(t('Created new %type %term.', array('%term' => theme('placeholder', $form_values['name']), '%type' => $type)));
      break;
    case SAVED_UPDATED:
      drupal_set_message(t('The %type %term has been updated.', array('%term' => theme('placeholder', $form_values['name']), '%type' => $type)));
      break;
  }
  return 'admin/forum';
}

/**
 * Returns a confirmation page for deleting a forum taxonomy term.
 *
 * @param $tid ID of the term to be deleted
 */
function _forum_confirm_delete($tid) {
  $term = taxonomy_get_term($tid);

  $form['tid'] = array('#type' => 'value', '#value' => $tid);
  $form['name'] = array('#type' => 'value', '#value' => $term->name);

554
  return confirm_form('forum_confirm_delete', $form, t('Are you sure you want to delete the forum %name?', array('%name' => theme('placeholder', $term->name))), 'admin/forums', t('Deleting a forum or container will delete all sub-forums and associated posts as well. This action cannot be undone.'), t('Delete'), t('Cancel'));
555 556 557 558 559 560 561
}

/**
 * Implementation of forms api _submit call. Deletes a forum after confirmation.
 */
function forum_confirm_delete_submit($form_id, $form_values) {
  taxonomy_del_term($form_values['tid']);
562 563
  drupal_set_message(t('The forum %term and all sub-forums and associated posts have been deleted.', array('%term' => theme('placeholder', $form_values['name']))));
  watchdog('content', t('forum: deleted %term and all its sub-forums and associated posts.', array('%term' => theme('placeholder', $form_values['name']))));
564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659

  return 'admin/forum';
}

/**
 * Returns an overview list of existing forums and containers
 */
function forum_overview() {
  $header = array(t('Name'), t('Operations'));

  $tree = taxonomy_get_tree(_forum_get_vid());
  if ($tree) {
    foreach ($tree as $term) {
      if (in_array($term->tid, variable_get('forum_containers', array()))) {
        $rows[] = array(_taxonomy_depth($term->depth) .' '. check_plain($term->name), l(t('edit container'), "admin/forum/edit/container/$term->tid"));
      }
      else {
        $rows[] = array(_taxonomy_depth($term->depth) .' '. check_plain($term->name), l(t('edit forum'), "admin/forum/edit/forum/$term->tid"));
       }

    }
  }
  else {
    $rows[] = array(array('data' => '<em>' . t('There are no existing containers or forums. You may add some on the <a href="%container">add container</a> or <a href="%forum">add forum</a> pages.', array('%container' => url('admin/forum/add/container'), '%forum' => url('admin/forum/add/forum'))) . '</em>', 'colspan' => 2));
  }
  return theme('table', $header, $rows);
}

/**
 * Returns a select box for available parent terms
 *
 * @param $tid ID of the term which is being added or edited
 * @param $title Title to display the select box with
 * @param $child_type Whether the child is forum or container
 */
function _forum_parent_select($tid, $title, $child_type) {

  $parents = taxonomy_get_parents($tid);
  if ($parents) {
    $parent = array_shift($parents);
    $parent = $parent->tid;
  }
  else {
    $parent = 0;
  }

  $children = taxonomy_get_tree(_forum_get_vid(), $tid);

  // A term can't be the child of itself, nor of its children.
  foreach ($children as $child) {
    $exclude[] = $child->tid;
  }
  $exclude[] = $tid;

  $tree = taxonomy_get_tree(_forum_get_vid());
  $options[0] = '<'. t('root') .'>';
  if ($tree) {
    foreach ($tree as $term) {
      if (!in_array($term->tid, $exclude)) {
        $options[$term->tid] = _taxonomy_depth($term->depth) . $term->name;
      }
    }
  }
  if ($child_type == 'container') {
    $description = t('Containers are usually placed at the top (root) level of your forum but you can also place a container inside a parent container or forum.');
  }
  else if ($child_type == 'forum') {
    $description = t('You may place your forum inside a parent container or forum, or at the top (root) level of your forum.');
  }

  return array('#type' => 'select', '#title' => $title, '#default_value' => $parent, '#options' => $options, '#description' => $description, '#required' => TRUE);
}

function forum_term_path($term) {
  return 'forum/'. $term->tid;
}

/**
 * Returns the vocabulary id for forum navigation.
 */
function _forum_get_vid() {
  $vid = variable_get('forum_nav_vocabulary', '');
  if (empty($vid)) {
    // Check to see if a forum vocabulary exists
    $vid = db_result(db_query("SELECT vid FROM {vocabulary} WHERE module = '%s'", 'forum'));
    if (!$vid) {
      $edit = array('name' => 'Forums', 'multiple' => 0, 'required' => 1, 'hierarchy' => 1, 'relations' => 0, 'module' => 'forum', 'nodes' => array('forum' => 1));
      taxonomy_save_vocabulary($edit);
      $vid = $edit['vid'];
    }
    variable_set('forum_nav_vocabulary', $vid);
  }

  return $vid;
}

Dries's avatar
Dries committed
660 661 662
/**
 * Formats a topic for display
 *
663
 * @TODO Give a better description. Not sure where this function is used yet.
Dries's avatar
Dries committed
664
 */
Dries's avatar
Dries committed
665
function _forum_format($topic) {
666
  if ($topic && $topic->timestamp) {
667
    return t('%time ago<br />by %author', array('%time' => format_interval(time() - $topic->timestamp), '%author' => theme('username', $topic)));
Dries's avatar
Dries committed
668 669 670 671 672 673
  }
  else {
    return message_na();
  }
}

Dries's avatar
Dries committed
674 675 676
/**
 * Returns a list of all forums for a given taxonomy id
 *
677
 * Forum objects contain the following fields
Dries's avatar
Dries committed
678 679 680 681 682 683 684 685 686
 * -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 $tid
 *   Taxonomy ID of the vocabulary that holds the forum list.
 * @return
 *   Array of object containing the forum information.
 */
Dries's avatar
Dries committed
687
function forum_get_forums($tid = 0) {
688

Dries's avatar
Dries committed
689 690
  $forums = array();
  $_forums = taxonomy_get_tree(variable_get('forum_nav_vocabulary', ''), $tid);
Dries's avatar
Dries committed
691

Dries's avatar
Dries committed
692
  if (count($_forums)) {
Dries's avatar
Dries committed
693

Dries's avatar
Dries committed
694 695
    $counts = array();

Dries's avatar
Dries committed
696
    $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 AND n.type = 'forum' GROUP BY r.tid";
697
    $sql = db_rewrite_sql($sql);
Dries's avatar
Dries committed
698
    $_counts = db_query($sql, $forum->tid);
Dries's avatar
Dries committed
699 700 701
    while ($count = db_fetch_object($_counts)) {
      $counts[$count->tid] = $count;
    }
Dries's avatar
Dries committed
702
  }
Dries's avatar
Dries committed
703

Dries's avatar
Dries committed
704 705 706 707
  foreach ($_forums as $forum) {
    if (in_array($forum->tid, variable_get('forum_containers', array()))) {
      $forum->container = 1;
    }
Dries's avatar
Dries committed
708

Dries's avatar
Dries committed
709 710 711 712 713 714 715 716 717 718 719
    if ($counts[$forum->tid]) {
      $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
720
    // used to join node_comment_statistics to users.
721
    $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.nid = tn.nid 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";
722
    $sql = db_rewrite_sql($sql);
Dries's avatar
Dries committed
723
    $topic = db_fetch_object(db_query_range($sql, $forum->tid, 0, 1));
724 725

    $last_post = new StdClass();
Dries's avatar
Dries committed
726 727 728 729
    $last_post->timestamp = $topic->last_comment_timestamp;
    $last_post->name = $topic->last_comment_name;
    $last_post->uid = $topic->last_comment_uid;
    $forum->last_post = $last_post;
Dries's avatar
Dries committed
730

Dries's avatar
Dries committed
731 732 733 734
    $forums[$forum->tid] = $forum;
  }

  return $forums;
Dries's avatar
Dries committed
735 736
}

737 738 739 740 741
/**
 * Calculate the number of nodes the user has not yet read and are newer
 * than NODE_NEW_LIMIT.
 */
function _forum_topics_unread($term, $uid) {
742
  $sql = "SELECT COUNT(n.nid) FROM {node} n INNER JOIN {term_node} tn ON n.nid = tn.nid AND tn.tid = %d LEFT JOIN {history} h ON n.nid = h.nid AND h.uid = %d WHERE n.status = 1 AND n.type = 'forum' AND n.created > %d AND h.nid IS NULL";
743
  $sql = db_rewrite_sql($sql);
744
  return db_result(db_query($sql, $term, $uid, NODE_NEW_LIMIT));
Dries's avatar
Dries committed
745 746
}

Dries's avatar
Dries committed
747
function forum_get_topics($tid, $sortby, $forum_per_page) {
Dries's avatar
Dries committed
748
  global $user, $forum_topic_list_header;
Dries's avatar
Dries committed
749

Dries's avatar
Dries committed
750
  $forum_topic_list_header = array(
Dries's avatar
Dries committed
751 752
    array('data' => '&nbsp;'),
    array('data' => t('Topic'), 'field' => 'n.title'),
Dries's avatar
Dries committed
753
    array('data' => t('Replies'), 'field' => 'l.comment_count'),
Dries's avatar
Dries committed
754
    array('data' => t('Created'), 'field' => 'n.created'),
Dries's avatar
Dries committed
755
    array('data' => t('Last reply'), 'field' => 'l.last_comment_timestamp'),
Dries's avatar
Dries committed
756
  );
Dries's avatar
Dries committed
757

Dries's avatar
Dries committed
758
  $order = _forum_get_topic_order($sortby);
Dries's avatar
Dries committed
759
  for ($i = 0; $i < count($forum_topic_list_header); $i++) {
Dries's avatar
Dries committed
760 761
    if ($forum_topic_list_header[$i]['field'] == $order['field']) {
      $forum_topic_list_header[$i]['sort'] = $order['sort'];
Dries's avatar
Dries committed
762 763 764 765
    }
  }

  $term = taxonomy_get_term($tid);
Dries's avatar
Dries committed
766

767
  $sql = db_rewrite_sql("SELECT n.nid, f.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 FROM {node_comment_statistics} l, {users} cu, {term_node} r, {users} u, {forum} f, {node} n WHERE n.status = 1 AND l.last_comment_uid = cu.uid AND n.nid = l.nid AND n.nid = r.nid AND r.tid = %d AND n.uid = u.uid AND n.vid = f.vid");
Dries's avatar
Dries committed
768
  $sql .= tablesort_sql($forum_topic_list_header, 'n.sticky DESC,');
769
  $sql .= ', n.created DESC';  // Always add a secondary sort order so that the news forum topics are on top.
Dries's avatar
Dries committed
770

771
  $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 AND n.type = 'forum'");
Dries's avatar
Dries committed
772

773
  $result = pager_query($sql, $forum_per_page, 0, $sql_count, $tid);
Dries's avatar
Dries committed
774 775

  while ($topic = db_fetch_object($result)) {
Dries's avatar
Dries committed
776 777
    if ($user->uid) {
      // folder is new if topic is new or there are new comments since last visit
Dries's avatar
Dries committed
778
      if ($topic->tid != $tid) {
Dries's avatar
Dries committed
779
        $topic->new = 0;
Dries's avatar
Dries committed
780 781
      }
      else {
Dries's avatar
Dries committed
782
        $history = _forum_user_last_visit($topic->nid);
Dries's avatar
Dries committed
783
        $topic->new_replies = comment_num_new($topic->nid, $history);
784
        $topic->new = $topic->new_replies || ($topic->timestamp > $history);
Dries's avatar
Dries committed
785
      }
786 787
    }
    else {
788
      // Do not track "new replies" status for topics if the user is anonymous.
Dries's avatar
Dries committed
789 790
      $topic->new_replies = 0;
      $topic->new = 0;
791
    }
Dries's avatar
Dries committed
792

Dries's avatar
Dries committed
793
    if ($topic->num_comments > 0) {
794
      $last_reply = new StdClass();
Dries's avatar
Dries committed
795 796 797 798 799
      $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
800 801 802
    $topics[] = $topic;
  }

Dries's avatar
Dries committed
803
  return $topics;
Dries's avatar
Dries committed
804 805
}

Dries's avatar
Dries committed
806 807 808
/**
 * Finds the first unread node for a given forum.
 */
Dries's avatar
Dries committed
809
function _forum_new($tid) {
Dries's avatar
Dries committed
810 811
  global $user;

Dries's avatar
Dries committed
812
  $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 n.type = 'forum' AND h.nid IS NULL AND n.created > %d ORDER BY created";
813
  $sql = db_rewrite_sql($sql);
Dries's avatar
Dries committed
814
  $nid = db_result(db_query_range($sql, $user->uid, $tid, NODE_NEW_LIMIT, 0, 1));
Dries's avatar
Dries committed
815 816 817 818

  return $nid ? $nid : 0;
}

819
/**
820
 * Menu callback; prints a forum listing.
821
 */
Dries's avatar
Dries committed
822
function forum_page($tid = 0) {
823
  if (module_exist('taxonomy') && module_exist('comment')) {
Dries's avatar
Dries committed
824 825
    $forum_per_page = variable_get('forum_per_page', 25);
    $sortby = variable_get('forum_order', 1);
Dries's avatar
Dries committed
826

Dries's avatar
Dries committed
827 828 829 830
    $forums = forum_get_forums($tid);
    $parents = taxonomy_get_parents_all($tid);
    if ($tid && !in_array($tid, variable_get('forum_containers', array()))) {
      $topics = forum_get_topics($tid, $sortby, $forum_per_page);
Dries's avatar
Dries committed
831
    }
Dries's avatar
Dries committed
832

Dries's avatar
Dries committed
833
    return theme('forum_display', $forums, $topics, $parents, $tid, $sortby, $forum_per_page);
Dries's avatar
Dries committed
834 835
  }
  else {
836 837
    drupal_set_message(t('The forum module requires both the taxonomy module and the comment module to be enabled and configured.'), 'error');
    return ' ';
Dries's avatar
Dries committed
838 839 840
  }
}

Dries's avatar
Dries committed
841
/**
Dries's avatar
Dries committed
842 843
 * Format the forum body.
 *
Dries's avatar
Dries committed
844
 * @ingroup themeable
Dries's avatar
Dries committed
845
 */
Dries's avatar
Dries committed
846
function theme_forum_display($forums, $topics, $parents, $tid, $sortby, $forum_per_page) {
Dries's avatar
Dries committed
847
  global $user;
Dries's avatar
Dries committed
848
  // forum list, topics list, topic browser and 'add new topic' link
Dries's avatar
Dries committed
849

Dries's avatar
Dries committed
850
  $vocabulary = taxonomy_get_vocabulary(variable_get('forum_nav_vocabulary', ''));
851
  $title = $vocabulary->name;
Dries's avatar
Dries committed
852

Dries's avatar
Dries committed
853 854
  // Breadcrumb navigation:
  $breadcrumb = array();
Dries's avatar
Dries committed
855
  if ($tid) {
Dries's avatar
Dries committed
856
    $breadcrumb[] = array('path' => 'forum', 'title' => $title);
Dries's avatar
Dries committed
857
  }
Dries's avatar
Dries committed
858 859

  if ($parents) {
Dries's avatar
Dries committed
860 861
    $parents = array_reverse($parents);
    foreach ($parents as $p) {
862 863
      if ($p->tid == $tid) {
        $title = $p->name;
Dries's avatar
Dries committed
864 865
      }
      else {
Dries's avatar
Dries committed
866
        $breadcrumb[] = array('path' => 'forum/'. $p->tid, 'title' => $p->name);
Dries's avatar
Dries committed
867 868 869
      }
    }
  }
870 871 872

  drupal_set_title($title);

Dries's avatar
Dries committed
873 874
  $breadcrumb[] = array('path' => $_GET['q']);
  menu_set_location($breadcrumb);
Dries's avatar
Dries committed
875

Dries's avatar
Dries committed
876
  if (count($forums) || count($parents)) {
877 878
    $output  = '<div id="forum">';
    $output .= '<ul>';
Dries's avatar
Dries committed
879 880 881

    if (module_exist('tracker')) {
      if ($user->uid) {
882
        $output .= ' <li>'. l(t('My discussions.'), "tracker/$user->uid") .'</li>';
Dries's avatar
Dries committed
883 884
      }

885
      $output .= ' <li>'. l(t('Active discussions.'), 'tracker') .'</li>';
Dries's avatar
Dries committed
886 887 888
    }

    if (user_access('create forum topics')) {
889
      $output .= '<li>'. l(t('Post new forum topic.'), "node/add/forum/$tid") .'</li>';
Dries's avatar
Dries committed
890 891
    }
    else if ($user->uid) {
892
      $output .= '<li>'. t('You are not allowed to post a new forum topic.') .'</li>';
Dries's avatar
Dries committed
893 894 895 896
    }
    else {
      $output .= '<li>'. t('<a href="%login">Login</a> to post a new forum topic.', array('%login' => url('user/login'))) .'</li>';
    }
897
    $output .= '</ul>';
Dries's avatar
Dries committed
898

Dries's avatar
Dries committed
899
    $output .= theme('forum_list', $forums, $parents, $tid);
Dries's avatar
Dries committed
900

Dries's avatar
Dries committed
901
    if ($tid && !in_array($tid, variable_get('forum_containers', array()))) {
902 903 904 905
      drupal_add_link(array('rel' => 'alternate',
                            'type' => 'application/rss+xml',
                            'title' => 'RSS - '. $title,
                            'href' => url('taxonomy/term/'. $tid .'/0/feed')));
Dries's avatar
Dries committed
906

Dries's avatar
Dries committed
907
      $output .= theme('forum_topic_list', $tid, $topics, $sortby, $forum_per_page);
908
      $output .= theme('feed_icon', url("taxonomy/term/$tid/0/feed"));
Dries's avatar
Dries committed
909
    }
910
    $output .= '</div>';
Dries's avatar
Dries committed
911 912
  }
  else {
913
    drupal_set_title(t('No forums defined'));
Dries's avatar
Dries committed
914
    $output = '';
Dries's avatar
Dries committed
915 916
  }

917
  return $output;
Dries's avatar
Dries committed
918 919
}

Dries's avatar
Dries committed
920
/**
Dries's avatar
Dries committed
921 922
 * Format the forum listing.
 *
Dries's avatar
Dries committed
923
 * @ingroup themeable
Dries's avatar
Dries committed
924
 */
Dries's avatar
Dries committed
925
function theme_forum_list($forums, $parents, $tid) {
Dries's avatar
Dries committed
926 927
  global $user;

Dries's avatar
Dries committed
928 929
  if ($forums) {

Dries's avatar
Dries committed
930
    $header = array(t('Forum'), t('Topics'), t('Posts'), t('Last post'));
Dries's avatar
Dries committed
931 932

    foreach ($forums as $forum) {
Dries's avatar
Dries committed
933
      if ($forum->container) {
934 935
        $description  = '<div style="margin-left: '. ($forum->depth * 30) ."px;\">\n";
        $description .= ' <div class="name">'. l($forum->name, "forum/$forum->tid") ."</div>\n";
Dries's avatar
Dries committed
936 937

        if ($forum->description) {
938
          $description .= ' <div class="description">'. filter_xss_admin($forum->description) ."</div>\n";
Dries's avatar
Dries committed
939 940 941
        }
        $description .= "</div>\n";

Dries's avatar
Dries committed
942
        $rows[] = array(array('data' => $description, 'class' => 'container', 'colspan' => '4'));
943
      }
Dries's avatar
Dries committed
944
      else {
945 946 947
        $new_topics = _forum_topics_unread($forum->tid, $user->uid);
        $forum->old_topics = $forum->num_topics - $new_topics;
        if (!$user->uid) {
Dries's avatar
Dries committed
948 949
          $new_topics = 0;
        }
Dries's avatar
Dries committed
950

951 952
        $description  = '<div style="margin-left: '. ($forum->depth * 30) ."px;\">\n";
        $description .= ' <div class="name">'. l($forum->name, "forum/$forum->tid") ."</div>\n";
Dries's avatar
Dries committed
953

Dries's avatar
Dries committed
954
        if ($forum->description) {
955
          $description .= ' <div class="description">'. filter_xss_admin($forum->description) ."</div>\n";
Dries's avatar
Dries committed
956 957
        }
        $description .= "</div>\n";
Dries's avatar
Dries committed
958

Dries's avatar
Dries committed
959
        $rows[] = array(
Dries's avatar
Dries committed
960
          array('data' => $description, 'class' => 'forum'),
961
          array('data' => $forum->num_topics . ($new_topics ? '<br />'. l(format_plural($new_topics, '1 new', '%count new'), "forum/$forum->tid", NULL, NULL, 'new') : ''), 'class' => 'topics'),
Dries's avatar
Dries committed
962 963
          array('data' => $forum->num_posts, 'class' => 'posts'),
          array('data' => _forum_format($forum->last_post), 'class' => 'last-reply'));
Dries's avatar
Dries committed
964
      }
Dries's avatar
Dries committed
965
    }
Dries's avatar
Dries committed
966 967 968

    return theme('table', $header, $rows);

Dries's avatar
Dries committed
969 970 971 972
  }

}

Dries's avatar
Dries committed
973
/**
Dries's avatar
Dries committed
974 975
 * Format the topic listing.
 *
Dries's avatar
Dries committed
976
 * @ingroup themeable
Dries's avatar
Dries committed
977
 */
Dries's avatar
Dries committed
978 979
function theme_forum_topic_list($tid, $topics, $sortby, $forum_per_page) {
  global $forum_topic_list_header;
Dries's avatar
Dries committed
980 981

  if ($topics) {
Dries's avatar
Dries committed
982

Dries's avatar
Dries committed
983 984
    foreach ($topics as $topic) {
      // folder is new if topic is new or there are new comments since last visit
Dries's avatar
Dries committed
985
      if ($topic->tid != $tid) {
Dries's avatar
Dries committed
986
        $rows[] = array(
987
          array('data' => theme('forum_icon', $topic->new, $topic->num_comments, $topic->comment_mode, $topic->sticky), 'class' => 'icon'),
988
          array('data' => check_plain($topic->title), 'class' => 'title'),
Dries's avatar
Dries committed
989
          array('data' => l(t('This topic has been moved'), "forum/$topic->tid"), 'colspan' => '3')
Dries's avatar
Dries committed
990
        );
Dries's avatar
Dries committed
991 992
      }
      else {
Dries's avatar
Dries committed
993
        $rows[] = array(
994
          array('data' => theme('forum_icon', $topic->new, $topic->num_comments, $topic->comment_mode, $topic->sticky), 'class' => 'icon'),
Dries's avatar
Dries committed
995
          array('data' => l($topic->title, "node/$topic->nid"), 'class' => 'topic'),
996
          array('data' => $topic->num_comments . ($topic->new_replies ? '<br />'. l(format_plural($topic->new_replies, '1 new', '%count new'), "node/$topic->nid", NULL, NULL, 'new') : ''), 'class' => 'replies'),
Dries's avatar
Dries committed
997 998
          array('data' => _forum_format($topic), 'class' => 'created'),
          array('data' => _forum_format($topic->last_reply), 'class' => 'last-reply')
Dries's avatar
Dries committed
999
        );
Dries's avatar
Dries committed
1000 1001
      }
    }
Dries's avatar
Dries committed
1002
  }
Dries's avatar
Dries committed
1003

Dries's avatar
Dries committed
1004
  $output .= theme('table', $forum_topic_list_header, $rows);
1005
  $output .= theme('pager', NULL, $forum_per_page, 0, tablesort_pager());
Dries's avatar
Dries committed
1006

Dries's avatar
Dries committed
1007 1008 1009
  return $output;
}

1010 1011 1012 1013 1014 1015
/**
 * Format the icon for each individual topic.
 *
 * @ingroup themeable
 */
function theme_forum_icon($new_posts, $num_posts = 0, $comment_mode = 0, $sticky = 0) {
Dries's avatar
Dries committed
1016

1017 1018
  if ($num_posts > variable_get('forum_hot_topic', 15)) {
    $icon = $new_posts ? 'hot-new' : 'hot';
Dries's avatar
Dries committed
1019 1020
  }
  else {
1021
    $icon = $new_posts ? 'new' : 'default';
Dries's avatar
Dries committed
1022
  }
Dries's avatar
Dries committed
1023

1024 1025 1026 1027 1028 1029 1030 1031 1032 1033
  if ($comment_mode == COMMENT_NODE_READ_ONLY || $comment_mode == COMMENT_NODE_DISABLED) {
    $icon = 'closed';
  }

  if ($sticky == 1) {
    $icon = 'sticky';
  }

  $output = theme('image', "misc/forum-$icon.png");

Dries's avatar
Dries committed
1034 1035 1036 1037
  if ($new_posts) {
    $output = "<a name=\"new\">$output</a>";
  }

1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073
  return $output;
}

/**
 * Format the next/previous forum topic navigation links.
 *
 * @ingroup themeable
 */
function theme_forum_topic_navigation($node) {
  $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 AND n.type = 'forum' ORDER BY n.sticky DESC, ". _forum_get_topic_order_sql(variable_get('forum_order', 1));
  $result = db_query(db_rewrite_sql($sql), $node->tid);

  while ($topic = db_fetch_object($result)) {
    if ($stop == 1) {
      $next = new StdClass();
      $next->nid = $topic->nid;
      $next->title = $topic->title;
      break;
    }
    if ($topic->nid == $node->nid) {
      $stop = 1;
    }
    else {
      $prev = new StdClass();
      $prev->nid = $topic->nid;
      $prev->title = $topic->title;
    }
  }

  if ($prev || $next) {
    $output .= '<div class="forum-topic-navigation">';

    if ($prev) {
1074
      $output .= l(t('‹ ') . $prev->title, 'node/'. $prev->nid, array('class' => 'topic-previous', 'title' => t('Go to previous forum topic')));
1075 1076
    }
    if ($next) {
1077
      $output .= l($next->title . t(' ›'), 'node/'. $next->nid, array('class' => 'topic-next', 'title' => t('Go to next forum topic')));
1078 1079 1080 1081 1082
    }

    $output .= '</div>';
  }

Dries's avatar
Dries committed
1083
  return $output;
Dries's avatar
Dries committed
1084 1085 1086 1087
}

function _forum_user_last_visit($nid) {
  global $user;
1088 1089 1090
  static $history = array();

  if (empty($history)) {
Dries's avatar
Dries committed
1091
    $result = db_query('SELECT nid, timestamp FROM {history} WHERE uid = %d', $user->uid);
Dries's avatar
Dries committed
1092
    while ($t = db_fetch_object($result)) {
1093
      $history[$t->nid] = $t->timestamp > NODE_NEW_LIMIT ? $t->timestamp : NODE_NEW_LIMIT;
Dries's avatar
Dries committed
1094 1095
    }
  }
1096
  return $history[$nid] ? $history[$nid] : NODE_NEW_LIMIT;
Dries's avatar
Dries committed
1097 1098 1099 1100 1101
}

function _forum_get_topic_order($sortby) {
  switch ($sortby) {
    case 1:
Dries's avatar
Dries committed
1102
      return array('field' => 'l.last_comment_timestamp', 'sort' => 'desc');
Dries's avatar
Dries committed
1103 1104
      break;
    case 2:
Dries's avatar
Dries committed
1105
      return array('field' => 'l.last_comment_timestamp', 'sort' => 'asc');
Dries's avatar
Dries committed
1106 1107
      break;
    case 3:
Dries's avatar
Dries committed
1108
      return array('field' => 'l.comment_count', 'sort' => 'desc');
Dries's avatar
Dries committed
1109 1110
      break;
    case 4:
Dries's avatar
Dries committed
1111
      return array('field' => 'l.comment_count', 'sort' => 'asc');
Dries's avatar
Dries committed
1112 1113 1114 1115
      break;
  }
}

Dries's avatar
Dries committed
1116 1117 1118 1119 1120
function _forum_get_topic_order_sql($sortby) {
  $order = _forum_get_topic_order($sortby);
  return $order['field'] .' '. $order['sort'];
}

1121