forum.module 40.6 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 12
/**
 * Implementation of hook_help().
 */
function forum_help($section) {
Dries's avatar
 
Dries committed
13
  switch ($section) {
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
      $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>';
17
      $output .= '<p>'. t('Forums module <strong>requires Taxonomy and Comments module</strong> be enabled.') .'</p>';
18
      $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>';
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 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>';
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 27
    case 'admin/content/forum/settings':
      return '<p>'. t('These settings provide the ability to fine tune the display of your forum topics.') .'</p>';
Dries's avatar
 
Dries committed
28 29 30
  }
}

31 32 33
/**
 * Implementation of hook_menu().
 */
34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
function forum_menu() {
  $items['node/add/forum'] = array(
    'title' => t('Forum topic'),
    'access arguments' => array('create forum topics'),
  );
  $items['forum'] = array(
    'title' => t('Forums'),
    'page callback' => 'forum_page',
    'access arguments' => array('access content'),
    'type' => MENU_SUGGESTED_ITEM,
  );
  $items['admin/content/forum'] = array(
    'title' => t('Forums'),
    'description' => t('Control forums and their hierarchy and change forum settings.'),
    'page callback' => 'forum_overview',
    'access arguments' => array('administer forums'),
  );
  $items['admin/content/forum/list'] = array(
    'title' => t('List'),
    'type' => MENU_DEFAULT_LOCAL_TASK,
    'weight' => -10,
  );
  $items['admin/content/forum/add/container'] = array(
    'title' => t('Add container'),
    'page callback' => 'forum_form_main',
    'page arguments' => array('container'),
    'type' => MENU_LOCAL_TASK,
61
    'parent' => 'admin/content/forum',
62 63 64 65 66 67
  );
  $items['admin/content/forum/add/forum'] = array(
    'title' => t('Add forum'),
    'page callback' => 'forum_form_main',
    'page arguments' => array('forum'),
    'type' => MENU_LOCAL_TASK,
68
    'parent' => 'admin/content/forum',
69 70 71 72 73 74 75
  );
  $items['admin/content/forum/settings'] = array(
    'title' => t('Settings'),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('forum_admin_settings'),
    'weight' => 5,
    'type' => MENU_LOCAL_TASK,
76
    'parent' => 'admin/content/forum',
77
  );
78
  $items['admin/content/forum/edit/%forum_term'] = array(
79 80 81
    'page callback' => 'forum_form_main',
    'type' => MENU_CALLBACK,
  );
82
  $items['admin/content/forum/edit/container/%forum_term'] = array(
83
    'title' => t('Edit container'),
84
    'page callback' => 'forum_form_main',
85
    'page arguments' => array('container', 5),
86
    'type' => MENU_CALLBACK,
87
  );
88
  $items['admin/content/forum/edit/forum/%forum_term'] = array(
89 90 91
    'title' => t('Edit forum'),
    'page callback' => 'forum_form_main',
    'page arguments' => array('forum', 5),
92
    'type' => MENU_CALLBACK,
93 94 95
  );
  return $items;
}
96

97 98 99
function forum_init() {
  drupal_add_css(drupal_get_path('module', 'forum') .'/forum.css');
}
100

101
function forum_term_load($tid) {
102
  return (array)taxonomy_get_term($tid);
103 104
}

105
/**
106
 * Implementation of hook_node_info().
107
 */
108
function forum_node_info() {
109 110
  return array(
    'forum' => array(
111
      'name' => t('Forum topic'),
112 113 114 115 116
      'module' => 'forum',
      'description' => t('Create a new topic for discussion in the forums.'),
      'title_label' => t('Subject'),
    )
  );
Dries's avatar
 
Dries committed
117 118
}

119 120 121
/**
 * Implementation of hook_access().
 */
Dries's avatar
 
Dries committed
122
function forum_access($op, $node) {
Dries's avatar
 
Dries committed
123 124
  global $user;

Dries's avatar
 
Dries committed
125 126
  if ($op == 'create') {
    return user_access('create forum topics');
Dries's avatar
 
Dries committed
127
  }
Dries's avatar
 
Dries committed
128 129 130 131 132 133

  if ($op == 'update' || $op == 'delete') {
    if (user_access('edit own forum topics') && ($user->uid == $node->uid)) {
      return TRUE;
    }
  }
Dries's avatar
 
Dries committed
134 135
}

136 137 138
/**
 * Implementation of hook_perm().
 */
Dries's avatar
 
Dries committed
139
function forum_perm() {
140
  return array('create forum topics', 'edit own forum topics', 'administer forums');
Dries's avatar
 
Dries committed
141
}
Dries's avatar
 
Dries committed
142

143 144 145 146 147
/**
 * Implementation of hook_nodeapi().
 */
function forum_nodeapi(&$node, $op, $teaser, $page) {
  switch ($op) {
148
    case 'delete revision':
149 150 151 152 153
      db_query('DELETE FROM {forum} WHERE vid = %d', $node->vid);
      break;
  }
}

154 155 156
/**
 * Implementation of hook_taxonomy().
 */
157
function forum_taxonomy($op, $type, $term = NULL) {
158
  if ($op == 'delete' && $term['vid'] == _forum_get_vid()) {
159 160
    switch ($type) {
      case 'term':
161
        $results = db_query('SELECT f.nid FROM {forum} f WHERE f.tid = %d', $term['tid']);
162 163 164 165 166 167 168
        while ($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());
169 170
        $key = array_search($term['tid'], $containers);
        if ($key !== FALSE) {
171 172 173 174 175 176
          unset($containers[$key]);
        }
        variable_set('forum_containers', $containers);
        break;
      case 'vocabulary':
        variable_del('forum_nav_vocabulary');
Dries's avatar
 
Dries committed
177
    }
178 179
  }
}
Dries's avatar
 
Dries committed
180

Dries's avatar
Dries committed
181
function forum_admin_settings() {
182
  $form = array();
183
  $number = drupal_map_assoc(array(5, 10, 15, 20, 25, 30, 35, 40, 50, 60, 80, 100, 150, 200, 250, 300, 350, 400, 500));
184 185 186 187 188 189
  $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.'),
  );
190
  $number = drupal_map_assoc(array(10, 25, 50, 75, 100));
191 192 193 194 195 196
  $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.'),
  );
197
  $forder = array(1 => t('Date - newest first'), 2 => t('Date - oldest first'), 3 => t('Posts - most active first'), 4=> t('Posts - least active first'));
198 199 200 201 202 203
  $form['forum_order'] = array('#type' => 'radios',
    '#title' => t('Default order'),
    '#default_value' => variable_get('forum_order', '1'),
    '#options' => $forder,
    '#description' => t('The default display order for topics.'),
  );
204
  return system_settings_form($form);
205 206
}

207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230
/**
 * 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']);
    }
  }
}

231 232 233
/**
 * Implementation of hook_load().
 */
Dries's avatar
 
Dries committed
234
function forum_load($node) {
235
  $forum = db_fetch_object(db_query('SELECT * FROM {forum} WHERE vid = %d', $node->vid));
Dries's avatar
 
Dries committed
236 237 238 239

  return $forum;
}

240 241 242 243 244 245
/**
 * Implementation of hook_block().
 *
 * Generates a block containing the currently active forum topics and the
 * most recently added forum topics.
 */
246 247 248
function forum_block($op = 'list', $delta = 0, $edit = array()) {
  switch ($op) {
    case 'list':
Dries's avatar
 
Dries committed
249 250
      $blocks[0]['info'] = t('Active forum topics');
      $blocks[1]['info'] = t('New forum topics');
251
      return $blocks;
Dries's avatar
 
Dries committed
252

253
    case 'configure':
254
      $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)));
255
      return $form;
Dries's avatar
 
Dries committed
256

257
    case 'save':
258
      variable_set('forum_block_num_'. $delta, $edit['forum_block_num_'. $delta]);
259
      break;
Dries's avatar
 
Dries committed
260

261 262
    case 'view':
      if (user_access('access content')) {
Dries's avatar
 
Dries committed
263 264
        switch ($delta) {
          case 0:
265
            $title = t('Active forum topics');
266
            $sql = db_rewrite_sql("SELECT n.nid, n.title, l.comment_count, l.last_comment_timestamp 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");
267 268 269 270
            $result = db_query_range($sql, 0, variable_get('forum_block_num_0', '5'));
            if (db_num_rows($result)) {
              $content = node_title_list($result);
            }
271
            break;
Dries's avatar
 
Dries committed
272 273

          case 1:
274 275
            $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");
276 277 278 279
            $result = db_query_range($sql, 0, variable_get('forum_block_num_1', '5'));
            if (db_num_rows($result)) {
              $content = node_title_list($result);
            }
280
            break;
Dries's avatar
 
Dries committed
281
        }
Dries's avatar
 
Dries committed
282

283
        if ($content) {
284
          $content .= '<div class="more-link">'. l(t('more'), 'forum', array('title' => t('Read the latest forum topics.'))) .'</div>';
285 286
        }

Dries's avatar
 
Dries committed
287
        $block['subject'] = $title;
288 289 290 291 292
        $block['content'] = $content;

        return $block;
      }
  }
Dries's avatar
 
Dries committed
293 294
}

295 296 297
/**
 * Implementation of hook_view().
 */
Dries's avatar
 
Dries committed
298
function forum_view(&$node, $teaser = FALSE, $page = FALSE) {
Dries's avatar
 
Dries committed
299
  if ($page) {
300
    $vocabulary = taxonomy_vocabulary_load(variable_get('forum_nav_vocabulary', ''));
Dries's avatar
 
Dries committed
301
    // Breadcrumb navigation
Dries's avatar
 
Dries committed
302 303
    $breadcrumb = array();
    $breadcrumb[] = array('path' => 'forum', 'title' => $vocabulary->name);
Dries's avatar
 
Dries committed
304
    if ($parents = taxonomy_get_parents_all($node->tid)) {
Dries's avatar
 
Dries committed
305 306
      $parents = array_reverse($parents);
      foreach ($parents as $p) {
Dries's avatar
 
Dries committed
307
        $breadcrumb[] = array('path' => 'forum/'. $p->tid, 'title' => $p->name);
Dries's avatar
 
Dries committed
308 309
      }
    }
Dries's avatar
 
Dries committed
310 311
    $breadcrumb[] = array('path' => 'node/'. $node->nid);
    menu_set_location($breadcrumb);
312
  }
Dries's avatar
 
Dries committed
313

314
  $node = node_prepare($node, $teaser);
315 316 317 318 319 320
  if (!$teaser) {
    $node->content['forum_navigation'] = array(
      '#value' => theme('forum_topic_navigation', $node),
      '#weight' => 100,
    );
  }
321
  return $node;
Dries's avatar
 
Dries committed
322 323
}

324
/**
325 326 327 328
 * Implementation of hook_submit().
 *
 * Check in particular that only a "leaf" term in the associated taxonomy
 * vocabulary is selected, not a "container" term.
329
 */
330
function forum_submit(&$node) {
331
  // Make sure all fields are set properly:
Dries's avatar
 
Dries committed
332
  $node->icon = $node->icon ? $node->icon : '';
Dries's avatar
 
Dries committed
333

334
  if ($node->taxonomy) {
335 336 337 338 339 340 341
    // Get the forum terms from the (cached) tree
    $tree = taxonomy_get_tree(_forum_get_vid());
    if ($tree) {
      foreach ($tree as $term) {
        $forum_terms[] = $term->tid;
      }
    }
Dries's avatar
 
Dries committed
342
    foreach ($node->taxonomy as $term) {
343
      if (in_array($term, $forum_terms)) {
344
        $node->tid = $term;
Dries's avatar
 
Dries committed
345
      }
346
    }
347
    $old_tid = db_result(db_query_range("SELECT tid FROM {forum} WHERE nid = %d ORDER BY vid DESC", $node->nid, 0,1));
348
    if ($old_tid) {
349 350 351
      if (($node->tid != $old_tid) && $node->shadow) {
        // A shadow copy needs to be created. Retain new term and add old term.
        $node->taxonomy[] = $old_tid;
Dries's avatar
 
Dries committed
352 353
      }
    }
Dries's avatar
Dries committed
354
  }
355
}
Dries's avatar
Dries committed
356

357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376
/**
 * 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' => $term->name)));
        }
      }
    }
  }
377 378
}

379 380 381 382 383
/**
 * Implementation of hook_update().
 */
function forum_update($node) {
  if ($node->revision) {
384 385 386 387 388
    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
389 390
}

391 392 393
/**
 * Implementation of hook_form().
 */
Dries's avatar
 
Dries committed
394
function forum_form(&$node) {
395
  $type = node_get_types('type', $node);
396
  $form['title'] = array('#type' => 'textfield', '#title' => check_plain($type->title_label), '#default_value' => !empty($node->title) ? $node->title : '', '#required' => TRUE, '#weight' => -5);
397

398
  if (!empty($node->nid)) {
399
    $forum_terms = taxonomy_node_get_terms_by_vocabulary(_forum_get_vid(), $node);
Dries's avatar
Dries committed
400
    // if editing, give option to leave shadows
401
    $shadow = (count($forum_terms) > 1);
402
    $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
403
  }
Dries's avatar
 
Dries committed
404

405
  $form['body_filter']['body'] = array('#type' => 'textarea', '#title' => check_plain($type->body_label), '#default_value' => !empty($node->body) ? $node->body : '', '#rows' => 20, '#required' => TRUE);
406
  $form['body_filter']['format'] = filter_form($node->format);
Dries's avatar
 
Dries committed
407

408
  return $form;
Dries's avatar
 
Dries committed
409 410
}

411 412 413 414
/**
 * Implementation of hook_prepare; assign forum taxonomy when adding a topic from within a forum.
 */
function forum_prepare(&$node) {
415
  if (empty($node->nid)) {
416
    // new topic
417 418
    $node->taxonomy[arg(3)]->vid = _forum_get_vid();
    $node->taxonomy[arg(3)]->tid = arg(3);
419 420 421
  }
}

422 423 424 425 426 427 428 429 430 431 432 433
/**
 * Implementation of hook_insert().
 */
function forum_insert($node) {
  db_query('INSERT INTO {forum} (nid, vid, tid) VALUES (%d, %d, %d)', $node->nid, $node->vid, $node->tid);
}

/**
 * Implementation of hook_delete().
 */
function forum_delete(&$node) {
  db_query('DELETE FROM {forum} WHERE nid = %d', $node->nid);
Dries's avatar
 
Dries committed
434
}
Dries's avatar
 
Dries committed
435

436 437 438 439 440 441 442 443 444 445 446
/**
 * 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.
  $form['name'] = array(
    '#title' => t('Container name'),
    '#type' => 'textfield',
    '#default_value' => $edit['name'],
447
    '#maxlength' => 255,
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
    '#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']);
  }
476 477 478
  $form['#submit']['forum_form_submit'] = array();
  $form['#validate']['forum_form_validate'] = array();
  $form['#theme'] = 'forum_form';
479

480
  return $form;
481 482
}

483 484 485 486 487 488 489 490 491 492 493 494 495 496
function forum_form_main($type, $edit = array()) {
  if ($_POST['op'] == t('Delete') || $_POST['confirm']) {
    return drupal_get_form('forum_confirm_delete', $edit['tid']);
  }
  switch ($type) {
    case 'forum':
      return drupal_get_form('forum_form_forum', $edit);
      break;
    case 'container':
      return drupal_get_form('forum_form_container', $edit);
      break;
  }
}

497 498 499 500 501 502 503 504 505
/**
 * 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()) {
  $form['name'] = array('#type' => 'textfield',
    '#title' => t('Forum name'),
    '#default_value' => $edit['name'],
506
    '#maxlength' => 255,
507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528
    '#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']);
  }
529 530 531
  $form['#submit']['forum_form_submit'] = array();
  $form['#validate']['forum_form_validate'] = array();
  $form['#theme'] = 'forum_form';
532

533
  return $form;
534 535 536 537 538 539 540 541 542 543 544
}

/**
 * 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 {
545
    $container = FALSE;
546 547 548 549 550 551 552 553 554 555 556
    $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);
      }
557
      drupal_set_message(t('Created new @type %term.', array('%term' => $form_values['name'], '@type' => $type)));
558 559
      break;
    case SAVED_UPDATED:
560
      drupal_set_message(t('The @type %term has been updated.', array('%term' => $form_values['name'], '@type' => $type)));
561 562
      break;
  }
563
  return 'admin/content/forum';
564 565 566 567 568 569 570
}

/**
 * Returns a confirmation page for deleting a forum taxonomy term.
 *
 * @param $tid ID of the term to be deleted
 */
571
function forum_confirm_delete($tid) {
572 573 574 575 576
  $term = taxonomy_get_term($tid);

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

577
  return confirm_form($form, t('Are you sure you want to delete the forum %name?', array('%name' => $term->name)), 'admin/content/forum', 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'));
578 579 580 581 582 583 584
}

/**
 * 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']);
585 586
  drupal_set_message(t('The forum %term and all sub-forums and associated posts have been deleted.', array('%term' => $form_values['name'])));
  watchdog('content', t('forum: deleted %term and all its sub-forums and associated posts.', array('%term' => $form_values['name'])));
587

588
  return 'admin/content/forum';
589 590 591 592 593 594 595 596 597 598 599 600
}

/**
 * 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()))) {
601
        $rows[] = array(str_repeat(' -- ', $term->depth) .' '. l($term->name, 'forum/'. $term->tid), l(t('edit container'), 'admin/content/forum/edit/container/'. $term->tid));
602 603
      }
      else {
604
        $rows[] = array(str_repeat(' -- ', $term->depth) .' '. l($term->name, 'forum/'. $term->tid), l(t('edit forum'), 'admin/content/forum/edit/forum/'. $term->tid));
605 606 607 608 609
       }

    }
  }
  else {
610
    $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/content/forum/add/container'), '@forum' => url('admin/content/forum/add/forum'))) . '</em>', 'colspan' => 2));
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
  }
  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)) {
drumm's avatar
drumm committed
646
        $options[$term->tid] = str_repeat(' -- ', $term->depth) . $term->name;
647 648 649 650 651 652 653 654 655 656 657 658 659
      }
    }
  }
  if ($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);
}

660
function forum_link_alter(&$node, &$links) {
661
  foreach ($links as $module => $link) {
662
    if (strstr($module, 'taxonomy_term')) {
663 664
      // 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.
665
      $tid = str_replace('taxonomy/term/', '', $link['href']);
666 667
      $term = taxonomy_get_term($tid);
      if ($term->vid == _forum_get_vid()) {
668
        $links[$module]['href'] = str_replace('taxonomy/term', 'forum', $link['href']);
669
      }
670 671
    }
  }
672 673 674 675 676 677 678 679 680 681 682
}

/**
 * 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) {
683 684
      // Create the forum vocabulary. Assign the vocabulary a low weight so
      // it will appear first in forum topic create and edit forms.
685
      $edit = array('name' => t('Forums'), 'multiple' => 0, 'required' => 1, 'hierarchy' => 1, 'relations' => 0, 'module' => 'forum', 'weight' => -10, 'nodes' => array('forum' => 1));
686 687 688 689 690 691 692 693 694
      taxonomy_save_vocabulary($edit);
      $vid = $edit['vid'];
    }
    variable_set('forum_nav_vocabulary', $vid);
  }

  return $vid;
}

Dries's avatar
 
Dries committed
695 696 697
/**
 * Formats a topic for display
 *
698
 * @TODO Give a better description. Not sure where this function is used yet.
Dries's avatar
 
Dries committed
699
 */
Dries's avatar
 
Dries committed
700
function _forum_format($topic) {
701
  if ($topic && $topic->timestamp) {
702
    return t('@time ago<br />by !author', array('@time' => format_interval(time() - $topic->timestamp), '!author' => theme('username', $topic)));
Dries's avatar
 
Dries committed
703 704
  }
  else {
705
    return t('n/a');
Dries's avatar
 
Dries committed
706 707 708
  }
}

Dries's avatar
 
Dries committed
709 710 711
/**
 * Returns a list of all forums for a given taxonomy id
 *
712
 * Forum objects contain the following fields
Dries's avatar
 
Dries committed
713 714 715 716 717 718 719 720 721
 * -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
722
function forum_get_forums($tid = 0) {
723

Dries's avatar
 
Dries committed
724 725
  $forums = array();
  $_forums = taxonomy_get_tree(variable_get('forum_nav_vocabulary', ''), $tid);
Dries's avatar
 
Dries committed
726

Dries's avatar
 
Dries committed
727
  if (count($_forums)) {
Dries's avatar
 
Dries committed
728

Dries's avatar
 
Dries committed
729 730
    $counts = array();

Dries's avatar
 
Dries committed
731
    $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";
732
    $sql = db_rewrite_sql($sql);
Dries's avatar
 
Dries committed
733
    $_counts = db_query($sql, $forum->tid);
Dries's avatar
 
Dries committed
734 735 736
    while ($count = db_fetch_object($_counts)) {
      $counts[$count->tid] = $count;
    }
Dries's avatar
 
Dries committed
737
  }
Dries's avatar
 
Dries committed
738

Dries's avatar
 
Dries committed
739 740 741 742
  foreach ($_forums as $forum) {
    if (in_array($forum->tid, variable_get('forum_containers', array()))) {
      $forum->container = 1;
    }
Dries's avatar
 
Dries committed
743

Dries's avatar
 
Dries committed
744 745 746 747 748 749 750 751 752 753 754
    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
755
    // used to join node_comment_statistics to users.
756
    $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 n.type='forum' AND tn.tid = %d ORDER BY ncs.last_comment_timestamp DESC";
757
    $sql = db_rewrite_sql($sql);
Dries's avatar
 
Dries committed
758
    $topic = db_fetch_object(db_query_range($sql, $forum->tid, 0, 1));
759

760
    $last_post = new stdClass();
Dries's avatar
 
Dries committed
761 762 763 764
    $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
765

Dries's avatar
 
Dries committed
766 767 768 769
    $forums[$forum->tid] = $forum;
  }

  return $forums;
Dries's avatar
 
Dries committed
770 771
}

772 773 774 775 776
/**
 * Calculate the number of nodes the user has not yet read and are newer
 * than NODE_NEW_LIMIT.
 */
function _forum_topics_unread($term, $uid) {
777
  $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";
778
  $sql = db_rewrite_sql($sql);
779
  return db_result(db_query($sql, $term, $uid, NODE_NEW_LIMIT));
Dries's avatar
 
Dries committed
780 781
}

Dries's avatar
Dries committed
782
function forum_get_topics($tid, $sortby, $forum_per_page) {
Dries's avatar
 
Dries committed
783
  global $user, $forum_topic_list_header;
Dries's avatar
 
Dries committed
784

Dries's avatar
 
Dries committed
785
  $forum_topic_list_header = array(
786
    array('data' => '&nbsp;', 'field' => NULL),
Dries's avatar
 
Dries committed
787
    array('data' => t('Topic'), 'field' => 'n.title'),
Dries's avatar
 
Dries committed
788
    array('data' => t('Replies'), 'field' => 'l.comment_count'),
Dries's avatar
 
Dries committed
789
    array('data' => t('Created'), 'field' => 'n.created'),
Dries's avatar
 
Dries committed
790
    array('data' => t('Last reply'), 'field' => 'l.last_comment_timestamp'),
Dries's avatar
 
Dries committed
791
  );
Dries's avatar
 
Dries committed
792

Dries's avatar
 
Dries committed
793
  $order = _forum_get_topic_order($sortby);
Dries's avatar
 
Dries committed
794
  for ($i = 0; $i < count($forum_topic_list_header); $i++) {
Dries's avatar
 
Dries committed
795 796
    if ($forum_topic_list_header[$i]['field'] == $order['field']) {
      $forum_topic_list_header[$i]['sort'] = $order['sort'];
Dries's avatar
 
Dries committed
797 798 799 800
    }
  }

  $term = taxonomy_get_term($tid);
Dries's avatar
 
Dries committed
801

802
  $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
803
  $sql .= tablesort_sql($forum_topic_list_header, 'n.sticky DESC,');
804
  $sql .= ', n.created DESC';  // Always add a secondary sort order so that the news forum topics are on top.
Dries's avatar
Dries committed
805

806
  $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
807

Steven Wittens's avatar
Steven Wittens committed
808
  $result = pager_query($sql, $forum_per_page, 0, $sql_count, $tid);
Dries's avatar
 
Dries committed
809 810

  while ($topic = db_fetch_object($result)) {
Dries's avatar
Dries committed
811 812
    if ($user->uid) {
      // folder is new if topic is new or there are new comments since last visit
Dries's avatar
 
Dries committed
813
      if ($topic->tid != $tid) {
Dries's avatar
Dries committed
814
        $topic->new = 0;
Dries's avatar
 
Dries committed
815 816
      }
      else {
Dries's avatar
 
Dries committed
817
        $history = _forum_user_last_visit($topic->nid);
Dries's avatar
 
Dries committed
818
        $topic->new_replies = comment_num_new($topic->nid, $history);
819
        $topic->new = $topic->new_replies || ($topic->timestamp > $history);
Dries's avatar
 
Dries committed
820
      }
821 822
    }
    else {
823
      // Do not track "new replies" status for topics if the user is anonymous.
Dries's avatar
Dries committed
824 825
      $topic->new_replies = 0;
      $topic->new = 0;
826
    }
Dries's avatar
 
Dries committed
827

Dries's avatar
 
Dries committed
828
    if ($topic->num_comments > 0) {
829
      $last_reply = new stdClass();
Dries's avatar
 
Dries committed
830 831 832 833 834
      $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
835 836 837
    $topics[] = $topic;
  }

Dries's avatar
Dries committed
838
  return $topics;
Dries's avatar
 
Dries committed
839 840
}

Dries's avatar
 
Dries committed
841 842 843
/**
 * Finds the first unread node for a given forum.
 */
Dries's avatar
Dries committed
844
function _forum_new($tid) {
Dries's avatar
 
Dries committed
845 846
  global $user;

Dries's avatar
 
Dries committed
847
  $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";
848
  $sql = db_rewrite_sql($sql);
Dries's avatar
 
Dries committed
849
  $nid = db_result(db_query_range($sql, $user->uid, $tid, NODE_NEW_LIMIT, 0, 1));
Dries's avatar
 
Dries committed
850 851 852 853

  return $nid ? $nid : 0;
}

854
/**
Dries's avatar
Dries committed
855
 * Menu callback; prints a forum listing.
856
 */
Dries's avatar
Dries committed
857
function forum_page($tid = 0) {
858
  if (module_exists('taxonomy') && module_exists('comment')) {
Dries's avatar
Dries committed
859 860
    $forum_per_page = variable_get('forum_per_page', 25);
    $sortby = variable_get('forum_order', 1);
Dries's avatar
 
Dries committed
861

Dries's avatar
Dries committed
862 863 864 865
    $forums = forum_get_forums($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
866
    }
Dries's avatar
Dries committed
867

Dries's avatar
 
Dries committed
868
    return theme('forum_display', $forums, $topics, $parents, $tid, $sortby, $forum_per_page);
Dries's avatar
 
Dries committed
869 870
  }
  else {
871 872
    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
873 874 875
  }
}

Dries's avatar
 
Dries committed
876
/**
Dries's avatar
 
Dries committed
877 878
 * Format the forum body.
 *
Dries's avatar
 
Dries committed
879
 * @ingroup themeable
Dries's avatar
 
Dries committed
880
 */
Dries's avatar
 
Dries committed
881
function theme_forum_display($forums, $topics, $parents, $tid, $sortby, $forum_per_page) {
Dries's avatar
 
Dries committed
882
  global $user;
Dries's avatar
 
Dries committed
883
  // forum list, topics list, topic browser and 'add new topic' link
Dries's avatar
 
Dries committed
884

885
  $vocabulary = taxonomy_vocabulary_load(variable_get('forum_nav_vocabulary', ''));
886
  $title = $vocabulary->name;
Dries's avatar
 
Dries committed
887

Dries's avatar
 
Dries committed
888 889
  // Breadcrumb navigation:
  $breadcrumb = array();
Dries's avatar
 
Dries committed
890
  if ($tid) {
Dries's avatar
 
Dries committed
891
    $breadcrumb[] = array('path' => 'forum', 'title' => $title);
Dries's avatar
 
Dries committed
892
  }
Dries's avatar
 
Dries committed
893 894

  if ($parents) {
Dries's avatar
 
Dries committed
895 896
    $parents = array_reverse($parents);
    foreach ($parents as $p) {
897 898
      if ($p->tid == $tid) {
        $title = $p->name;
Dries's avatar
 
Dries committed
899 900
      }
      else {
Dries's avatar
 
Dries committed
901
        $breadcrumb[] = array('path' => 'forum/'. $p->tid, 'title' => $p->name);
Dries's avatar
 
Dries committed
902 903 904
      }
    }
  }
905

Dries's avatar
Dries committed
906
  drupal_set_title(check_plain($title));
Dries's avatar