node.module 103 KB
Newer Older
Dries's avatar
 
Dries committed
1
<?php
2
// $Id$
Dries's avatar
 
Dries committed
3

Dries's avatar
 
Dries committed
4 5
/**
 * @file
6 7
 * The core that allows content to be submitted to the site. Modules and scripts may
 * programmatically submit nodes using the usual form API pattern.
Dries's avatar
 
Dries committed
8 9
 */

10 11
define('NODE_NEW_LIMIT', time() - 30 * 24 * 60 * 60);

Dries's avatar
 
Dries committed
12 13 14 15
/**
 * Implementation of hook_help().
 */
function node_help($section) {
16
  switch ($section) {
Dries's avatar
 
Dries committed
17
    case 'admin/help#node':
18 19 20 21 22 23 24 25 26 27
      $output = '<p>'. t('All content in a website is stored and treated as <b>nodes</b>. Therefore nodes are any postings such as blogs, stories, polls and forums. The node module manages these content types and is one of the strengths of Drupal over other content management systems.') .'</p>';
      $output .= '<p>'. t('Treating all content as nodes allows the flexibility of creating new types of content. It also allows you to painlessly apply new features or changes to all content. Comments are not stored as nodes but are always associated with a node.') .'</p>';
      $output .= t('<p>Node module features</p>
<ul>
<li>The list tab provides an interface to search and sort all content on your site.</li>
<li>The configure settings tab has basic settings for content on your site.</li>
<li>The configure content types tab lists all content types for your site and lets you configure their default workflow.</li>
<li>The search tab lets you search all content on your site</li>
</ul>
');
28
      $output .= '<p>'. t('For more information please read the configuration and customization handbook <a href="@node">Node page</a>.', array('@node' => 'http://drupal.org/handbook/modules/node/')) .'</p>';
Dries's avatar
 
Dries committed
29
      return $output;
30
    case 'admin/content/search':
31
      return '<p>'. t('Enter a simple pattern to search for a post. Words are matched exactly. Phrases can be surrounded by quotes to do an exact search.') .'</p>';
32 33 34
    case 'admin/content/types':
      return '<p>'. t('Below is a list of all the content types on your site. All posts that exist on your site are instances of one of these content types.') .'</p>';
    case 'admin/content/types/add':
35
      return '<p>'. t('To create a new content type, enter the human-readable name, the machine-readable name, and all other relevant fields that are on this page. Once created, users of your site will be able to create posts that are instances of this content type.') .'</p>';
Dries's avatar
 
Dries committed
36
  }
Dries's avatar
 
Dries committed
37 38

  if (arg(0) == 'node' && is_numeric(arg(1)) && arg(2) == 'revisions') {
39
    return '<p>'. t('The revisions let you track differences between multiple versions of a post.') .'</p>';
Dries's avatar
 
Dries committed
40
  }
41 42

  if (arg(0) == 'node' && arg(1) == 'add' && $type = arg(2)) {
43
    $type = node_get_types('type', str_replace('-', '_', arg(2)));
44
    return '<p>'. (isset($type->help) ? filter_xss_admin($type->help) : '') .'</p>';
45
  }
Dries's avatar
 
Dries committed
46 47
}

Dries's avatar
 
Dries committed
48 49 50
/**
 * Implementation of hook_cron().
 */
51
function node_cron() {
Dries's avatar
 
Dries committed
52
  db_query('DELETE FROM {history} WHERE timestamp < %d', NODE_NEW_LIMIT);
53 54
}

Dries's avatar
 
Dries committed
55 56 57 58
/**
 * Gather a listing of links to nodes.
 *
 * @param $result
59
 *   A DB result object from a query to fetch node objects. If your query joins the <code>node_comment_statistics</code> table so that the <code>comment_count</code> field is available, a title attribute will be added to show the number of comments.
Dries's avatar
 
Dries committed
60 61 62 63 64 65
 * @param $title
 *   A heading for the resulting list.
 *
 * @return
 *   An HTML list suitable as content for a block.
 */
Dries's avatar
 
Dries committed
66 67
function node_title_list($result, $title = NULL) {
  while ($node = db_fetch_object($result)) {
68
    $items[] = l($node->title, 'node/'. $node->nid, $node->comment_count ? array('title' => format_plural($node->comment_count, '1 comment', '@count comments')) : '');
Dries's avatar
 
Dries committed
69 70
  }

Dries's avatar
 
Dries committed
71
  return theme('node_list', $items, $title);
Dries's avatar
 
Dries committed
72 73
}

Dries's avatar
 
Dries committed
74 75 76
/**
 * Format a listing of links to nodes.
 */
Dries's avatar
 
Dries committed
77
function theme_node_list($items, $title = NULL) {
Dries's avatar
 
Dries committed
78
  return theme('item_list', $items, $title);
Dries's avatar
 
Dries committed
79 80
}

Dries's avatar
 
Dries committed
81 82 83
/**
 * Update the 'last viewed' timestamp of the specified node for current user.
 */
Dries's avatar
 
Dries committed
84 85 86 87
function node_tag_new($nid) {
  global $user;

  if ($user->uid) {
Dries's avatar
 
Dries committed
88
    if (node_last_viewed($nid)) {
Dries's avatar
 
Dries committed
89
      db_query('UPDATE {history} SET timestamp = %d WHERE uid = %d AND nid = %d', time(), $user->uid, $nid);
Dries's avatar
 
Dries committed
90 91
    }
    else {
Dries's avatar
 
Dries committed
92
      @db_query('INSERT INTO {history} (uid, nid, timestamp) VALUES (%d, %d, %d)', $user->uid, $nid, time());
Dries's avatar
 
Dries committed
93 94 95 96
    }
  }
}

Dries's avatar
 
Dries committed
97 98 99 100
/**
 * Retrieves the timestamp at which the current user last viewed the
 * specified node.
 */
Dries's avatar
 
Dries committed
101 102
function node_last_viewed($nid) {
  global $user;
Dries's avatar
 
Dries committed
103
  static $history;
Dries's avatar
 
Dries committed
104

Dries's avatar
 
Dries committed
105
  if (!isset($history[$nid])) {
106
    $history[$nid] = db_fetch_object(db_query("SELECT timestamp FROM {history} WHERE uid = %d AND nid = %d", $user->uid, $nid));
Dries's avatar
 
Dries committed
107 108
  }

109
  return (isset($history[$nid]->timestamp) ? $history[$nid]->timestamp : 0);
Dries's avatar
 
Dries committed
110 111 112
}

/**
113
 * Decide on the type of marker to be displayed for a given node.
Dries's avatar
 
Dries committed
114
 *
Dries's avatar
 
Dries committed
115 116 117 118
 * @param $nid
 *   Node ID whose history supplies the "last viewed" timestamp.
 * @param $timestamp
 *   Time which is compared against node's "last viewed" timestamp.
119 120
 * @return
 *   One of the MARK constants.
Dries's avatar
 
Dries committed
121
 */
122
function node_mark($nid, $timestamp) {
Dries's avatar
 
Dries committed
123 124 125
  global $user;
  static $cache;

126 127 128
  if (!$user->uid) {
    return MARK_READ;
  }
Dries's avatar
Dries committed
129
  if (!isset($cache[$nid])) {
130
    $cache[$nid] = node_last_viewed($nid);
Dries's avatar
 
Dries committed
131
  }
132 133 134 135 136 137 138
  if ($cache[$nid] == 0 && $timestamp > NODE_NEW_LIMIT) {
    return MARK_NEW;
  }
  elseif ($timestamp > $cache[$nid] && $timestamp > NODE_NEW_LIMIT) {
    return MARK_UPDATED;
  }
  return MARK_READ;
Dries's avatar
 
Dries committed
139 140
}

Dries's avatar
 
Dries committed
141
/**
142
 * Automatically generate a teaser for a node body in a given format.
Dries's avatar
 
Dries committed
143
 */
144
function node_teaser($body, $format = NULL) {
Dries's avatar
 
Dries committed
145

Dries's avatar
 
Dries committed
146
  $size = variable_get('teaser_length', 600);
Dries's avatar
 
Dries committed
147

148
  // Find where the delimiter is in the body
Steven Wittens's avatar
Steven Wittens committed
149
  $delimiter = strpos($body, '<!--break-->');
Dries's avatar
 
Dries committed
150

151
  // If the size is zero, and there is no delimiter, the entire body is the teaser.
152
  if ($size == 0 && $delimiter === FALSE) {
Dries's avatar
 
Dries committed
153 154
    return $body;
  }
Dries's avatar
 
Dries committed
155

156 157 158 159 160
  // If a valid delimiter has been specified, use it to chop off the teaser.
  if ($delimiter !== FALSE) {
    return substr($body, 0, $delimiter);
  }

161 162 163 164 165
  // We check for the presence of the PHP evaluator filter in the current
  // format. If the body contains PHP code, we do not split it up to prevent
  // parse errors.
  if (isset($format)) {
    $filters = filter_list_format($format);
166
    if (isset($filters['filter/1']) && strpos($body, '<?') !== FALSE) {
167 168
      return $body;
    }
169 170
  }

171
  // If we have a short body, the entire body is the teaser.
Dries's avatar
 
Dries committed
172 173 174 175
  if (strlen($body) < $size) {
    return $body;
  }

176 177 178 179 180 181 182 183 184 185 186 187 188 189 190
  // The teaser may not be longer than maximum length specified. Initial slice.
  $teaser = truncate_utf8($body, $size);
  $position = 0;
  // Cache the reverse of the teaser.
  $reversed = strrev($teaser);

  // In some cases, no delimiter has been specified. In this case, we try to
  // split at paragraph boundaries.
  $breakpoints = array('</p>' => 0, '<br />' => 6, '<br>' => 4, "\n" => 1);
  // We use strpos on the reversed needle and haystack for speed.
  foreach ($breakpoints as $point => $offset) {
    $length = strpos($reversed, strrev($point));
    if ($length !== FALSE) {
      $position = - $length - $offset;
      return ($position == 0) ? $teaser : substr($teaser, 0, $position);
191
    }
192
  }
Dries's avatar
Dries committed
193

194 195 196 197 198 199 200 201 202 203 204 205
  // When even the first paragraph is too long, we try to split at the end of
  // the last full sentence.
  $breakpoints = array('. ' => 1, '! ' => 1, '? ' => 1, '。' => 0, '؟ ' => 1);
  $min_length = strlen($reversed);
  foreach ($breakpoints as $point => $offset) {
    $length = strpos($reversed, strrev($point));
    if ($length !== FALSE) {
      $min_length = min($length, $min_length);
      $position = 0 - $length - $offset;
    }
  }
  return ($position == 0) ? $teaser : substr($teaser, 0, $position);
Dries's avatar
 
Dries committed
206 207
}

208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228
/**
 * Builds a list of available node types, and returns all of part of this list
 * in the specified format.
 *
 * @param $op
 *   The format in which to return the list. When this is set to 'type',
 *   'module', or 'name', only the specified node type is returned. When set to
 *   'types' or 'names', all node types are returned.
 * @param $node
 *   A node object, array, or string that indicates the node type to return.
 *   Leave at default value (NULL) to return a list of all node types.
 * @param $reset
 *   Whether or not to reset this function's internal cache (defaults to
 *   FALSE).
 *
 * @return
 *   Either an array of all available node types, or a single node type, in a
 *   variable format.
 */
function node_get_types($op = 'types', $node = NULL, $reset = FALSE) {
  static $_node_types, $_node_names;
229

230 231
  if ($reset || !isset($_node_types)) {
    list($_node_types, $_node_names) = _node_types_build();
232
  }
233

234 235 236 237 238 239 240 241 242 243
  if ($node) {
    if (is_array($node)) {
      $type = $node['type'];
    }
    elseif (is_object($node)) {
      $type = $node->type;
    }
    elseif (is_string($node)) {
      $type = $node;
    }
244
    if (!isset($_node_types[$type])) {
245 246 247 248
      return FALSE;
    }
  }
  switch ($op) {
249 250 251 252 253 254 255 256
    case 'types':
      return $_node_types;
    case 'type':
      return $_node_types[$type];
    case 'module':
      return $_node_types[$type]->module;
    case 'names':
      return $_node_names;
257
    case 'name':
258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274
      return $_node_names[$type];
  }
}

/**
 * Resets the database cache of node types, and saves all new or non-modified
 * module-defined node types to the database.
 */
function node_types_rebuild() {
  _node_types_build();

  $node_types = node_get_types('types', NULL, TRUE);

  foreach ($node_types as $type => $info) {
    if (!empty($info->is_new)) {
      node_type_save($info);
    }
275
  }
276 277

  _node_types_build();
278 279
}

280
/**
281 282 283 284
 * Saves a node type to the database.
 *
 * @param $info
 *   The node type to save, as an object.
Dries's avatar
 
Dries committed
285 286
 *
 * @return
287
 *   Status flag indicating outcome of the operation.
Dries's avatar
 
Dries committed
288
 */
289 290 291 292 293 294 295
function node_type_save($info) {
  $is_existing = FALSE;
  $existing_type = !empty($info->old_type) ? $info->old_type : $info->type;
  $is_existing = db_num_rows(db_query("SELECT * FROM {node_type} WHERE type = '%s'", $existing_type));

  if ($is_existing) {
    db_query("UPDATE {node_type} SET type = '%s', name = '%s', module = '%s', has_title = %d, title_label = '%s', has_body = %d, body_label = '%s', description = '%s', help = '%s', min_word_count = %d, custom = %d, modified = %d, locked = %d WHERE type = '%s'", $info->type, $info->name, $info->module, $info->has_title, $info->title_label, $info->has_body, $info->body_label, $info->description, $info->help, $info->min_word_count, $info->custom, $info->modified, $info->locked, $existing_type);
296 297

    module_invoke_all('node_type', 'update', $info);
298 299 300 301
    return SAVED_UPDATED;
  }
  else {
    db_query("INSERT INTO {node_type} (type, name, module, has_title, title_label, has_body, body_label, description, help, min_word_count, custom, modified, locked, orig_type) VALUES ('%s', '%s', '%s', %d, '%s', %d, '%s', '%s', '%s', %d, %d, %d, %d, '%s')", $info->type, $info->name, $info->module, $info->has_title, $info->title_label, $info->has_body, $info->body_label, $info->description, $info->help, $info->min_word_count, $info->custom, $info->modified, $info->locked, $info->orig_type);
302 303

    module_invoke_all('node_type', 'insert', $info);
304 305
    return SAVED_NEW;
  }
306
}
307

308 309 310 311 312 313 314 315 316 317 318 319 320
/**
 * Deletes a node type from the database.
 *
 * @param $type
 *   The machine-readable name of the node type to be deleted.
 */
function node_type_delete($type) {
  db_query("DELETE FROM {node_type} WHERE type = '%s'", $type);

  $info = node_get_types('type', $type);
  module_invoke_all('node_type', 'delete', $info);
}

321
/**
322 323
 * Updates all nodes of one type to be of another type.
 *
324
 * @param $old_type
325 326 327
 *   The current node type of the nodes.
 * @param $type
 *   The new node type of the nodes.
328 329
 *
 * @return
330
 *   The number of nodes whose node type field was modified.
331
 */
332 333 334
function node_type_update_nodes($old_type, $type) {
  db_query("UPDATE {node} SET type = '%s' WHERE type = '%s'", $type, $old_type);
  return db_affected_rows();
Dries's avatar
 
Dries committed
335
}
Dries's avatar
 
Dries committed
336

337
/**
338 339
 * Builds the list of available node types, by querying hook_node_info() in all
 * modules, and by looking for node types in the database.
Dries's avatar
 
Dries committed
340 341
 *
 */
342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402
function _node_types_build() {
  $_node_types = array();
  $_node_names = array();

  $info_array = module_invoke_all('node_info');
  foreach ($info_array as $type => $info) {
    $info['type'] = $type;
    $_node_types[$type] = (object) _node_type_set_defaults($info);
    $_node_names[$type] = $info['name'];
  }

  $type_result = db_query(db_rewrite_sql('SELECT nt.type, nt.* FROM {node_type} nt ORDER BY nt.type ASC', 'nt', 'type'));
  while ($type_object = db_fetch_object($type_result)) {
    if (!isset($_node_types[$type_object->type]) || $type_object->modified) {
      $_node_types[$type_object->type] = $type_object;
      $_node_names[$type_object->type] = $type_object->name;

      if ($type_object->type != $type_object->orig_type) {
        unset($_node_types[$type_object->orig_type]);
        unset($_node_names[$type_object->orig_type]);
      }
    }
  }

  asort($_node_names);

  return array($_node_types, $_node_names);
}

/**
 * Set default values for a node type defined through hook_node_info().
 */
function _node_type_set_defaults($info) {
  if (!isset($info['has_title'])) {
    $info['has_title'] = TRUE;
  }
  if ($info['has_title'] && !isset($info['title_label'])) {
    $info['title_label'] = t('Title');
  }

  if (!isset($info['has_body'])) {
    $info['has_body'] = TRUE;
  }
  if ($info['has_body'] && !isset($info['body_label'])) {
    $info['body_label'] = t('Body');
  }

  if (!isset($info['custom'])) {
    $info['custom'] = FALSE;
  }
  if (!isset($info['modified'])) {
    $info['modified'] = FALSE;
  }
  if (!isset($info['locked'])) {
    $info['locked'] = TRUE;
  }

  $info['orig_type'] = $info['type'];
  $info['is_new'] = TRUE;

  return $info;
Dries's avatar
 
Dries committed
403
}
Dries's avatar
 
Dries committed
404

405
/**
Dries's avatar
 
Dries committed
406 407 408 409 410 411 412 413 414 415
 * Determine whether a node hook exists.
 *
 * @param &$node
 *   Either a node object, node array, or a string containing the node type.
 * @param $hook
 *   A string containing the name of the hook.
 * @return
 *   TRUE iff the $hook exists in the node type of $node.
 */
function node_hook(&$node, $hook) {
416 417 418 419 420
  $module = node_get_types('module', $node);
  if ($module == 'node') {
    $module = 'node_content'; // Avoid function name collisions.
  }
  return module_hook($module, $hook);
Dries's avatar
 
Dries committed
421 422
}

423
/**
Dries's avatar
 
Dries committed
424 425 426 427 428 429 430 431 432
 * Invoke a node hook.
 *
 * @param &$node
 *   Either a node object, node array, or a string containing the node type.
 * @param $hook
 *   A string containing the name of the hook.
 * @param $a2, $a3, $a4
 *   Arguments to pass on to the hook, after the $node argument.
 * @return
Dries's avatar
 
Dries committed
433
 *   The returned value of the invoked hook.
Dries's avatar
 
Dries committed
434 435
 */
function node_invoke(&$node, $hook, $a2 = NULL, $a3 = NULL, $a4 = NULL) {
436
  if (node_hook($node, $hook)) {
437 438 439 440 441
    $module = node_get_types('module', $node);
    if ($module == 'node') {
      $module = 'node_content'; // Avoid function name collisions.
    }
    $function = $module .'_'. $hook;
Dries's avatar
 
Dries committed
442
    return ($function($node, $a2, $a3, $a4));
Dries's avatar
 
Dries committed
443 444 445
  }
}

Dries's avatar
 
Dries committed
446 447 448 449
/**
 * Invoke a hook_nodeapi() operation in all modules.
 *
 * @param &$node
Dries's avatar
 
Dries committed
450
 *   A node object.
Dries's avatar
 
Dries committed
451 452 453 454 455 456 457
 * @param $op
 *   A string containing the name of the nodeapi operation.
 * @param $a3, $a4
 *   Arguments to pass on to the hook, after the $node and $op arguments.
 * @return
 *   The returned value of the invoked hooks.
 */
Dries's avatar
 
Dries committed
458
function node_invoke_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL) {
Dries's avatar
 
Dries committed
459
  $return = array();
460
  foreach (module_implements('nodeapi') as $name) {
Dries's avatar
 
Dries committed
461
    $function = $name .'_nodeapi';
462
    $result = $function($node, $op, $a3, $a4);
463
    if (isset($result) && is_array($result)) {
464 465 466 467
      $return = array_merge($return, $result);
    }
    else if (isset($result)) {
      $return[] = $result;
Dries's avatar
 
Dries committed
468 469 470 471 472
    }
  }
  return $return;
}

Dries's avatar
 
Dries committed
473 474 475
/**
 * Load a node object from the database.
 *
476 477
 * @param $param
 *   Either the nid of the node or an array of conditions to match against in the database query
Dries's avatar
 
Dries committed
478 479
 * @param $revision
 *   Which numbered revision to load. Defaults to the current version.
Dries's avatar
 
Dries committed
480 481
 * @param $reset
 *   Whether to reset the internal node_load cache.
Dries's avatar
 
Dries committed
482 483 484 485
 *
 * @return
 *   A fully-populated node object.
 */
486
function node_load($param = array(), $revision = NULL, $reset = NULL) {
Dries's avatar
 
Dries committed
487 488 489 490 491 492
  static $nodes = array();

  if ($reset) {
    $nodes = array();
  }

493
  $cachable = ($revision == NULL);
494
  $arguments = array();
495
  if (is_numeric($param)) {
496
    if ($cachable && isset($nodes[$param])) {
497
      return is_object($nodes[$param]) ? drupal_clone($nodes[$param]) : $nodes[$param];
498
    }
499 500
    $cond = 'n.nid = %d';
    $arguments[] = $param;
Dries's avatar
 
Dries committed
501
  }
502 503
  else {
    // Turn the conditions into a query.
504
    foreach ($param as $key => $value) {
505 506
      $cond[] = 'n.'. db_escape_string($key) ." = '%s'";
      $arguments[] = $value;
507 508
    }
    $cond = implode(' AND ', $cond);
Dries's avatar
 
Dries committed
509 510
  }

Dries's avatar
 
Dries committed
511
  // Retrieve the node.
512
  // No db_rewrite_sql is applied so as to get complete indexing for search.
513
  if ($revision) {
514
    array_unshift($arguments, $revision);
515
    $node = db_fetch_object(db_query('SELECT n.nid, r.vid, n.type, n.status, n.created, n.changed, n.comment, n.promote, n.sticky, r.timestamp AS revision_timestamp, r.title, r.body, r.teaser, r.log, r.format, u.uid, u.name, u.picture, u.data FROM {node} n INNER JOIN {users} u ON u.uid = n.uid INNER JOIN {node_revisions} r ON r.nid = n.nid AND r.vid = %d WHERE '. $cond, $arguments));
Dries's avatar
 
Dries committed
516
  }
517
  else {
518
    $node = db_fetch_object(db_query('SELECT n.nid, n.vid, n.type, n.status, n.created, n.changed, n.comment, n.promote, n.sticky, r.timestamp AS revision_timestamp, r.title, r.body, r.teaser, r.log, r.format, u.uid, u.name, u.picture, u.data FROM {node} n INNER JOIN {users} u ON u.uid = n.uid INNER JOIN {node_revisions} r ON r.vid = n.vid WHERE '. $cond, $arguments));
Dries's avatar
 
Dries committed
519 520
  }

521 522 523 524 525 526 527
  if ($node->nid) {
    // Call the node specific callback (if any) and piggy-back the
    // results to the node or overwrite some values.
    if ($extra = node_invoke($node, 'load')) {
      foreach ($extra as $key => $value) {
        $node->$key = $value;
      }
Dries's avatar
 
Dries committed
528 529
    }

530 531 532 533 534
    if ($extra = node_invoke_nodeapi($node, 'load')) {
      foreach ($extra as $key => $value) {
        $node->$key = $value;
      }
    }
535 536 537
    if ($cachable) {
      $nodes[$node->nid] = is_object($node) ? drupal_clone($node) : $node;
    }
Dries's avatar
 
Dries committed
538 539
  }

Dries's avatar
 
Dries committed
540 541 542
  return $node;
}

Dries's avatar
 
Dries committed
543 544 545
/**
 * Save a node object into the database.
 */
546
function node_save(&$node) {
547
  global $user;
Dries's avatar
 
Dries committed
548

549
  $node->is_new = FALSE;
Dries's avatar
 
Dries committed
550

Dries's avatar
 
Dries committed
551
  // Apply filters to some default node fields:
Dries's avatar
 
Dries committed
552
  if (empty($node->nid)) {
Dries's avatar
 
Dries committed
553
    // Insert a new node.
554
    $node->is_new = TRUE;
Dries's avatar
 
Dries committed
555

Dries's avatar
 
Dries committed
556
    $node->nid = db_next_id('{node}_nid');
Steven Wittens's avatar
Steven Wittens committed
557
    $node->vid = db_next_id('{node_revisions}_vid');
558 559 560 561 562 563
  }
  else {
    // We need to ensure that all node fields are filled.
    $node_current = node_load($node->nid);
    foreach ($node as $field => $data) {
      $node_current->$field = $data;
Dries's avatar
 
Dries committed
564
    }
565
    $node = $node_current;
Dries's avatar
 
Dries committed
566

567
    if (!empty($node->revision)) {
568 569 570
      $node->old_vid = $node->vid;
      $node->vid = db_next_id('{node_revisions}_vid');
    }
Dries's avatar
 
Dries committed
571 572
  }

573 574 575 576
  // Set some required fields:
  if (empty($node->created)) {
    $node->created = time();
  }
577
  // The changed timestamp is always updated for bookkeeping purposes (revisions, searching, ...)
578
  $node->changed = time();
Dries's avatar
 
Dries committed
579

580 581 582
  // Split off revisions data to another structure
  $revisions_table_values = array('nid' => $node->nid, 'vid' => $node->vid,
                     'title' => $node->title, 'body' => $node->body,
583
                     'teaser' => $node->teaser, 'timestamp' => $node->changed,
584 585 586
                     'uid' => $user->uid, 'format' => $node->format);
  $revisions_table_types = array('nid' => '%d', 'vid' => '%d',
                     'title' => "'%s'", 'body' => "'%s'",
587
                     'teaser' => "'%s'", 'timestamp' => '%d',
588
                     'uid' => '%d', 'format' => '%d');
589
  if (!empty($node->log) || $node->is_new) {
590 591 592
    // Only store the log message if there's something to store; this prevents
    // existing log messages from being unintentionally overwritten by a blank
    // message. A new revision will have an empty log message (or $node->log).
593 594 595
    $revisions_table_values['log'] = $node->log;
    $revisions_table_types['log'] = "'%s'";
  }
596 597 598 599
  $node_table_values = array('nid' => $node->nid, 'vid' => $node->vid,
                    'title' => $node->title, 'type' => $node->type, 'uid' => $node->uid,
                    'status' => $node->status, 'created' => $node->created,
                    'changed' => $node->changed, 'comment' => $node->comment,
600
                    'promote' => $node->promote, 'sticky' => $node->sticky);
601 602 603 604
  $node_table_types = array('nid' => '%d', 'vid' => '%d',
                    'title' => "'%s'", 'type' => "'%s'", 'uid' => '%d',
                    'status' => '%d', 'created' => '%d',
                    'changed' => '%d', 'comment' => '%d',
605
                    'promote' => '%d', 'sticky' => '%d');
606 607 608 609 610 611 612 613 614 615 616 617 618 619

  //Generate the node table query and the
  //the node_revisions table query
  if ($node->is_new) {
    $node_query = 'INSERT INTO {node} ('. implode(', ', array_keys($node_table_types)) .') VALUES ('. implode(', ', $node_table_types) .')';
    $revisions_query = 'INSERT INTO {node_revisions} ('. implode(', ', array_keys($revisions_table_types)) .') VALUES ('. implode(', ', $revisions_table_types) .')';
  }
  else {
    $arr = array();
    foreach ($node_table_types as $key => $value) {
      $arr[] = $key .' = '. $value;
    }
    $node_table_values[] = $node->nid;
    $node_query = 'UPDATE {node} SET '. implode(', ', $arr) .' WHERE nid = %d';
620
    if (!empty($node->revision)) {
621 622 623 624 625 626
      $revisions_query = 'INSERT INTO {node_revisions} ('. implode(', ', array_keys($revisions_table_types)) .') VALUES ('. implode(', ', $revisions_table_types) .')';
    }
    else {
      $arr = array();
      foreach ($revisions_table_types as $key => $value) {
        $arr[] = $key .' = '. $value;
Dries's avatar
 
Dries committed
627
      }
628 629
      $revisions_table_values[] = $node->vid;
      $revisions_query = 'UPDATE {node_revisions} SET '. implode(', ', $arr) .' WHERE vid = %d';
Dries's avatar
 
Dries committed
630
    }
631
  }
Dries's avatar
 
Dries committed
632

633 634 635
  // Insert the node into the database:
  db_query($node_query, $node_table_values);
  db_query($revisions_query, $revisions_table_values);
Dries's avatar
 
Dries committed
636

637 638 639 640 641 642 643 644 645 646
  // Call the node specific callback (if any):
  if ($node->is_new) {
    node_invoke($node, 'insert');
    node_invoke_nodeapi($node, 'insert');
  }
  else {
    node_invoke($node, 'update');
    node_invoke_nodeapi($node, 'update');
  }

647 648 649
  // Update the node access table for this node.
  node_access_acquire_grants($node);

Dries's avatar
 
Dries committed
650
  // Clear the cache so an anonymous poster can see the node being added or updated.
Dries's avatar
 
Dries committed
651
  cache_clear_all();
Dries's avatar
 
Dries committed
652 653
}

Dries's avatar
 
Dries committed
654 655 656 657 658 659
/**
 * Generate a display of the given node.
 *
 * @param $node
 *   A node array or node object.
 * @param $teaser
660
 *   Whether to display the teaser only, as on the main page.
Dries's avatar
 
Dries committed
661 662
 * @param $page
 *   Whether the node is being displayed by itself as a page.
663 664
 * @param $links
 *   Whether or not to display node links. Links are omitted for node previews.
Dries's avatar
 
Dries committed
665 666 667 668
 *
 * @return
 *   An HTML representation of the themed node.
 */
669
function node_view($node, $teaser = FALSE, $page = FALSE, $links = TRUE) {
670
  $node = (object)$node;
Dries's avatar
 
Dries committed
671

672 673
  $node = node_build_content($node, $teaser, $page);

674 675
  if ($links) {
    $node->links = module_invoke_all('link', 'node', $node, !$page);
676 677 678 679 680

    foreach (module_implements('link_alter') AS $module) {
      $function = $module .'_link_alter';
      $function($node, $node->links);
    }
681
  }
682 683 684 685

  // Set the proper node part, then unset unused $node part so that a bad
  // theme can not open a security hole.
  $content = drupal_render($node->content);
686
  if ($teaser) {
687
    $node->teaser = $content;
688 689 690
    unset($node->body);
  }
  else {
691
    $node->body = $content;
692 693
    unset($node->teaser);
  }
Dries's avatar
 
Dries committed
694

695 696 697
  // Allow modules to modify the fully-built node.
  node_invoke_nodeapi($node, 'alter', $teaser, $page);

Dries's avatar
 
Dries committed
698
  return theme('node', $node, $teaser, $page);
Dries's avatar
 
Dries committed
699
}
Dries's avatar
 
Dries committed
700

Dries's avatar
 
Dries committed
701
/**
702
 * Apply filters and build the node's standard elements.
Dries's avatar
 
Dries committed
703
 */
Dries's avatar
 
Dries committed
704
function node_prepare($node, $teaser = FALSE) {
705 706 707
  // First we'll overwrite the existing node teaser and body with
  // the filtered copies! Then, we'll stick those into the content
  // array and set the read more flag if appropriate.
708
  $node->readmore = (strlen($node->teaser) < strlen($node->body));
709 710 711 712 713 714 715 716

  if ($teaser == FALSE) {
    $node->body = check_markup($node->body, $node->format, FALSE);
  }
  else {
    $node->teaser = check_markup($node->teaser, $node->format, FALSE);
  }

717
  $node->content['body'] = array(
718
    '#value' => $teaser ? $node->teaser : $node->body,
719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740
    '#weight' => 0,
  );

  return $node;
}

/**
 * Builds a structured array representing the node's content.
 *
 * @param $node
 *   A node object.
 * @param $teaser
 *   Whether to display the teaser only, as on the main page.
 * @param $page
 *   Whether the node is being displayed by itself as a page.
 *
 * @return
 *   An structured array containing the individual elements
 *   of the node's body.
 */
function node_build_content($node, $teaser = FALSE, $page = FALSE) {
  // Remove the delimiter (if any) that separates the teaser from the body.
Steven Wittens's avatar
Steven Wittens committed
741
  $node->body = str_replace('<!--break-->', '', $node->body);
742 743 744 745 746

  // The 'view' hook can be implemented to overwrite the default function
  // to display nodes.
  if (node_hook($node, 'view')) {
    $node = node_invoke($node, 'view', $teaser, $page);
Dries's avatar
 
Dries committed
747 748
  }
  else {
749
    $node = node_prepare($node, $teaser);
Dries's avatar
 
Dries committed
750
  }
751 752 753 754

  // Allow modules to make their own additions to the node.
  node_invoke_nodeapi($node, 'view', $teaser, $page);

Dries's avatar
 
Dries committed
755
  return $node;
Dries's avatar
 
Dries committed
756 757
}

Dries's avatar
 
Dries committed
758 759 760
/**
 * Generate a page displaying a single node, along with its comments.
 */
Dries's avatar
 
Dries committed
761
function node_show($node, $cid) {
Dries's avatar
 
Dries committed
762
  $output = node_view($node, FALSE, TRUE);
Dries's avatar
 
Dries committed
763

Dries's avatar
 
Dries committed
764 765
  if (function_exists('comment_render') && $node->comment) {
    $output .= comment_render($node, $cid);
Dries's avatar
 
Dries committed
766 767
  }

Dries's avatar
 
Dries committed
768 769
  // Update the history table, stating that this user viewed this node.
  node_tag_new($node->nid);
Dries's avatar
 
Dries committed
770

Dries's avatar
 
Dries committed
771
  return $output;
Dries's avatar
 
Dries committed
772 773
}

Dries's avatar
 
Dries committed
774 775 776
/**
 * Implementation of hook_perm().
 */
Dries's avatar
 
Dries committed
777
function node_perm() {
778 779 780 781
  $perms = array('administer content types', 'administer nodes', 'access content', 'view revisions', 'revert revisions');

  foreach (node_get_types() as $type) {
    if ($type->module == 'node') {
782
      $name = check_plain($type->type);
783 784 785 786 787 788 789
      $perms[] = 'create '. $name .' content';
      $perms[] = 'edit own '. $name .' content';
      $perms[] = 'edit '. $name .' content';
    }
  }

  return $perms;
Dries's avatar
 
Dries committed
790 791
}

Dries's avatar
 
Dries committed
792 793 794
/**
 * Implementation of hook_search().
 */
795
function node_search($op = 'search', $keys = NULL) {
796 797
  switch ($op) {
    case 'name':
798
      return t('Content');
799

Dries's avatar
Dries committed
800 801
    case 'reset':
      variable_del('node_cron_last');
802
      variable_del('node_cron_last_nid');
Dries's avatar
Dries committed
803
      return;
804

805 806
    case 'status':
      $last = variable_get('node_cron_last', 0);
807
      $last_nid = variable_get('node_cron_last_nid', 0);
808 809
      $total = db_result(db_query('SELECT COUNT(*) FROM {node} WHERE status = 1'));
      $remaining = db_result(db_query('SELECT COUNT(*) FROM {node} n LEFT JOIN {node_comment_statistics} c ON n.nid = c.nid WHERE n.status = 1 AND ((GREATEST(n.created, n.changed, c.last_comment_timestamp) = %d AND n.nid > %d ) OR (n.created > %d OR n.changed > %d OR c.last_comment_timestamp > %d))', $last, $last_nid, $last, $last, $last));
810
      return array('remaining' => $remaining, 'total' => $total);
811 812 813 814 815 816

    case 'admin':
      $form = array();
      // Output form for defining rank factor weights.
      $form['content_ranking'] = array('#type' => 'fieldset', '#title' => t('Content ranking'));
      $form['content_ranking']['#theme'] = 'node_search_admin';
817
      $form['content_ranking']['info'] = array('#value' => '<em>'. t('The following numbers control which properties the content search should favor when ordering the results. Higher numbers mean more influence, zero means the property is ignored. Changing these numbers does not require the search index to be rebuilt. Changes take effect immediately.') .'</em>');
818 819 820

      $ranking = array('node_rank_relevance' => t('Keyword relevance'),
                       'node_rank_recent' => t('Recently posted'));
821
      if (module_exists('comment')) {
822 823
        $ranking['node_rank_comments'] = t('Number of comments');
      }
824
      if (module_exists('statistics') && variable_get('statistics_count_content_views', 0)) {
825 826 827 828 829 830 831 832 833 834
        $ranking['node_rank_views'] = t('Number of views');
      }

      // Note: reversed to reflect that higher number = higher ranking.
      $options = drupal_map_assoc(range(0, 10));
      foreach ($ranking as $var => $title) {
        $form['content_ranking']['factors'][$var] = array('#title' => $title, '#type' => 'select', '#options' => $options, '#default_value' => variable_get($var, 5));
      }
      return $form;

835
    case 'search':
836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867
      // Build matching conditions
      list($join1, $where1) = _db_rewrite_sql();
      $arguments1 = array();
      $conditions1 = 'n.status = 1';

      if ($type = search_query_extract($keys, 'type')) {
        $types = array();
        foreach (explode(',', $type) as $t) {
          $types[] = "n.type = '%s'";
          $arguments1[] = $t;
        }
        $conditions1 .= ' AND ('. implode(' OR ', $types) .')';
        $keys = search_query_insert($keys, 'type');
      }

      if ($category = search_query_extract($keys, 'category')) {
        $categories = array();
        foreach (explode(',', $category) as $c) {
          $categories[] = "tn.tid = %d";
          $arguments1[] = $c;
        }
        $conditions1 .= ' AND ('. implode(' OR ', $categories) .')';
        $join1 .= ' INNER JOIN {term_node} tn ON n.nid = tn.nid';
        $keys = search_query_insert($keys, 'category');
      }

      // Build ranking expression (we try to map each parameter to a
      // uniform distribution in the range 0..1).
      $ranking = array();
      $arguments2 = array();
      $join2 = '';
      // Used to avoid joining on node_comment_statistics twice
868
      $stats_join = FALSE;
869
      $total = 0;
870 871 872 873
      if ($weight = (int)variable_get('node_rank_relevance', 5)) {
        // Average relevance values hover around 0.15
        $ranking[] = '%d * i.relevance';
        $arguments2[] = $weight;
874
        $total += $weight;
875 876 877 878 879 880 881
      }
      if ($weight = (int)variable_get('node_rank_recent', 5)) {
        // Exponential decay with half-life of 6 months, starting at last indexed node
        $ranking[] = '%d * POW(2, (GREATEST(n.created, n.changed, c.last_comment_timestamp) - %d) * 6.43e-8)';
        $arguments2[] = $weight;
        $arguments2[] = (int)variable_get('node_cron_last', 0);
        $join2 .= ' INNER JOIN {node} n ON n.nid = i.sid LEFT JOIN {node_comment_statistics} c ON c.nid = i.sid';
882
        $stats_join = TRUE;
883
        $total += $weight;
884
      }
885
      if (module_exists('comment') && $weight = (int)variable_get('node_rank_comments', 5)) {
886 887 888 889 890 891 892 893
        // Inverse law that maps the highest reply count on the site to 1 and 0 to 0.
        $scale = variable_get('node_cron_comments_scale', 0.0);
        $ranking[] = '%d * (2.0 - 2.0 / (1.0 + c.comment_count * %f))';
        $arguments2[] = $weight;
        $arguments2[] = $scale;
        if (!$stats_join) {
          $join2 .= ' LEFT JOIN {node_comment_statistics} c ON c.nid = i.sid';
        }
894
        $total += $weight;
895
      }
896
      if (module_exists('statistics') && variable_get('statistics_count_content_views', 0) &&
897 898 899 900 901 902
          $weight = (int)variable_get('node_rank_views', 5)) {
        // Inverse law that maps the highest view count on the site to 1 and 0 to 0.
        $scale = variable_get('node_cron_views_scale', 0.0);
        $ranking[] = '%d * (2.0 - 2.0 / (1.0 + nc.totalcount * %f))';
        $arguments2[] = $weight;
        $arguments2[] = $scale;
903
        $join2 .= ' LEFT JOIN {node_counter} nc ON nc.nid = i.sid';
904
        $total += $weight;
905
      }
906
      $select2 = (count($ranking) ? implode(' + ', $ranking) : 'i.relevance') .' AS score';
907 908 909 910 911

      // Do search
      $find = do_search($keys, 'node', 'INNER JOIN {node} n ON n.nid = i.sid '. $join1 .' INNER JOIN {users} u ON n.uid = u.uid', $conditions1 . (empty($where1) ? '' : ' AND '. $where1), $arguments1, $select2, $join2, $arguments2);

      // Load results
912 913
      $results = array();
      foreach ($find as $item) {
914
        // Build the node body.
915
        $node = node_load($item->sid);
916 917
        $node = node_build_content($node, FALSE, FALSE);
        $node->body = drupal_render($node->content);
918

919 920
        // Fetch comments for snippet
        $node->body .= module_invoke('comment', 'nodeapi', $node, 'update index');
921 922
        // Fetch terms for snippet
        $node->body .= module_invoke('taxonomy', 'nodeapi', $node, 'update index');
923

Dries's avatar
Dries committed
924
        $extra = node_invoke_nodeapi($node, 'search result');
925
        $results[] = array('link' => url('node/'. $item->sid, array('absolute' => TRUE)),
926
                           'type' => node_get_types('name', $node),
927
                           'title' => $node->title,
928
                           'user' => theme('username', $node),
929
                           'date' => $node->changed,
930
                           'node' => $node,
Dries's avatar
Dries committed
931
                           'extra' => $extra,
932
                           'score' => $item->score / $total,
933
                           'snippet' => search_excerpt($keys, $node->body));
934 935 936
      }
      return $results;
  }
Dries's avatar
 
Dries committed
937 938
}

939 940 941 942 943 944 945 946 947 948
/**
 * Implementation of hook_user().
 */
function node_user($op, &$edit, &$user) {
  if ($op == 'delete') {
    db_query('UPDATE {node} SET uid = 0 WHERE uid = %d', $user->uid);
    db_query('UPDATE {node_revisions} SET uid = 0 WHERE uid = %d', $user->uid);
  }
}

949
function theme_node_search_admin($form) {
950
  $output = drupal_render($form['info']);
951 952 953 954 955 956

  $header = array(t('Factor'), t('Weight'));
  foreach (element_children($form['factors']) as $key) {
    $row = array();
    $row[] = $form['factors'][$key]['#title'];
    unset($form['factors'][$key]['#title']);
957
    $row[] = drupal_render($form['factors'][$key]);
958 959 960 961
    $rows[] = $row;
  }
  $output .= theme('table', $header, $rows);

962
  $output .= drupal_render($form);
963 964 965
  return $output;
}

Dries's avatar
 
Dries committed
966
/**
Dries's avatar
 
Dries committed
967
 * Menu callback; presents general node configuration options.
Dries's avatar
 
Dries committed
968 969
 */
function node_configure() {
970
  // Only show rebuild button if there is 0 or more than 2 rows in node_access table, or if there are modules that implement node_grant.
971
  if (db_result(db_query('SELECT COUNT(*) FROM {node_access}')) != 1 || count(module_implements('node_grants')) > 0) {
972
    $status = '<p>'. t('If the site is experiencing problems with permissions to content, you may have to rebuild the permissions cache. Possible causes for permission problems are disabling modules or configuration changes to permissions. Rebuilding will remove all privileges to posts, and replace them with permissions based on the current modules and settings.') .'</p>';
973
    $status .= '<p>'. t('Rebuilding may take some time if there is a lot of content or complex permission settings. After rebuilding has completed posts will automatically use the new permissions.') .'</p>';
Dries's avatar
 
Dries committed
974

975 976 977 978