node.module 71.5 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 6 7 8
/**
 * @file
 * The core that allows content to be submitted to the site.
 */

9 10
define('NODE_NEW_LIMIT', time() - 30 * 24 * 60 * 60);

Dries's avatar
 
Dries committed
11 12 13 14
/**
 * Implementation of hook_help().
 */
function node_help($section) {
15
  switch ($section) {
Dries's avatar
 
Dries committed
16
    case 'admin/help#node':
Dries's avatar
 
Dries committed
17
      $output = t("
Dries's avatar
 
Dries committed
18 19 20 21 22 23 24
      <h3>Nodes</h3>
      <p>The core of the Drupal system is the node. All of the contents of the system are placed in nodes, or extensions of nodes.
      A base node contains:<dl>
      <dt>A Title</dt><dd>Up to 128 characters of text that titles the node.</dd>
      <dt>A Teaser</dt><dd>A small block of text that is meant to get you interested in the rest of node. Drupal will automatically pull a small amount of the body of the node to make the teaser (To configure how long the teaser will be <a href=\"%teaser\">click here</a>). The teaser can be changed if you don't like what Drupal grabs.</dd>
      <dt>The Body</dt><dd>The main text that comprises your content.</dd>
      <dt>A Type</dt><dd>What kind of node is this? Blog, book, forum, comment, unextended, etc.</dd>
25
      <dt>An Author</dt><dd>The author's name. It will either be \"anonymous\" or a valid user. You <em>cannot</em> set it to an arbitrary value.</dd>
Dries's avatar
 
Dries committed
26 27
      <dt>Authored on</dt><dd>The date the node was written.</dd>
      <dt>Changed</dt><dd>The last time this node was changed.</dd>
28
      <dt>Sticky at top of lists</dt><dd>In listings such as the frontpage or a taxonomy overview the teasers of a selected amount of nodes is displayed. If you want to force a node to appear on the top of such a listing, you must set it to 'sticky'. This way it will float to the top of a listing, and it will not be pushed down by newer content.
Dries's avatar
 
Dries committed
29 30
      <dt>Allow user comments</dt><dd>A node can have comments. These comments can be written by other users (Read-write), or only by admins (Read-only).</dd>
      <dt>Revisions</dt><dd>Drupal has a revision system so that you can \"roll back\" to an older version of a post if the new version is not what you want.</dd>
Dries's avatar
 
Dries committed
31
      <dt>Promote to front page</dt><dd>To get people to look at the new stuff on your site you can choose to move it to the front page. The front page is configured to show the teasers from only a few of the total nodes you have on your site (To configure how many teasers <a href=\"%teaser\">click here</a>).</dd>
32
      <dt>Published</dt><dd>When using Drupal's moderation system a node remains unpublished -- unavailable to non-moderators -- until it is marked Published.</dd></dl>
33
      <p>Now that you know what is in a node, here are some of the types of nodes available.</p>", array("%teaser" => url("admin/node/configure/settings")));
Dries's avatar
 
Dries committed
34

35 36
      foreach (node_get_types() as $type => $name) {
        $output .= '<h3>'. t('Node type: %name', array('%name' => $name)). '</h3>';
Dries's avatar
 
Dries committed
37
        $output .= implode("\n", module_invoke_all('help', 'node/add#'. $type));
Dries's avatar
 
Dries committed
38
      }
Dries's avatar
 
Dries committed
39

Dries's avatar
 
Dries committed
40
      return $output;
41

Dries's avatar
 
Dries committed
42
    case 'admin/modules#description':
43
      return t('Allows content to be submitted to the site and displayed on pages.');
44 45
    case 'admin/node/configure':
    case 'admin/node/configure/settings':
46
      return t('<p>Settings for the core of Drupal. Almost everything is a node so these settings will affect most of the site.</p>');
47
    case 'admin/node':
48
      return t('<p>Below is a list of all of the posts on your site. Other forms of content are listed elsewhere (e.g. <a href="%comments">comments</a>).</p><p>Clicking a title views the post, while clicking an author\'s name views their user information.</p>', array('%comments' => url('admin/comment')));
49
    case 'admin/node/search':
50
      return t('<p>Enter a simple pattern to search for a post. This can include the wildcard character *.<br />For example, a search for "br*" might return "bread bakers", "our daily bread" and "brenda".</p>');
Dries's avatar
 
Dries committed
51
  }
Dries's avatar
 
Dries committed
52 53 54 55

  if (arg(0) == 'node' && is_numeric(arg(1)) && arg(2) == 'revisions') {
    return t('The revisions let you track differences between multiple versions of a post.');
  }
56 57 58 59

  if (arg(0) == 'node' && arg(1) == 'add' && $type = arg(2)) {
    return variable_get($type .'_help', '');
  }
Dries's avatar
 
Dries committed
60 61
}

Dries's avatar
 
Dries committed
62 63 64
/**
 * Implementation of hook_cron().
 */
65
function node_cron() {
Dries's avatar
 
Dries committed
66
  db_query('DELETE FROM {history} WHERE timestamp < %d', NODE_NEW_LIMIT);
67 68
}

Dries's avatar
 
Dries committed
69 70 71 72
/**
 * Gather a listing of links to nodes.
 *
 * @param $result
73
 *   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
74 75 76 77 78 79
 * @param $title
 *   A heading for the resulting list.
 *
 * @return
 *   An HTML list suitable as content for a block.
 */
Dries's avatar
 
Dries committed
80 81
function node_title_list($result, $title = NULL) {
  while ($node = db_fetch_object($result)) {
Dries's avatar
 
Dries committed
82
    $items[] = l($node->title, 'node/'. $node->nid, $node->comment_count ? array('title' => format_plural($node->comment_count, '1 comment', '%count comments')) : '');
Dries's avatar
 
Dries committed
83 84
  }

Dries's avatar
 
Dries committed
85
  return theme('node_list', $items, $title);
Dries's avatar
 
Dries committed
86 87
}

Dries's avatar
 
Dries committed
88 89 90
/**
 * Format a listing of links to nodes.
 */
Dries's avatar
 
Dries committed
91
function theme_node_list($items, $title = NULL) {
Dries's avatar
 
Dries committed
92
  return theme('item_list', $items, $title);
Dries's avatar
 
Dries committed
93 94
}

Dries's avatar
 
Dries committed
95 96 97
/**
 * Update the 'last viewed' timestamp of the specified node for current user.
 */
Dries's avatar
 
Dries committed
98 99 100 101
function node_tag_new($nid) {
  global $user;

  if ($user->uid) {
Dries's avatar
 
Dries committed
102
    if (node_last_viewed($nid)) {
Dries's avatar
 
Dries committed
103
      db_query('UPDATE {history} SET timestamp = %d WHERE uid = %d AND nid = %d', time(), $user->uid, $nid);
Dries's avatar
 
Dries committed
104 105
    }
    else {
Dries's avatar
 
Dries committed
106
      @db_query('INSERT INTO {history} (uid, nid, timestamp) VALUES (%d, %d, %d)', $user->uid, $nid, time());
Dries's avatar
 
Dries committed
107 108 109 110
    }
  }
}

Dries's avatar
 
Dries committed
111 112 113 114
/**
 * Retrieves the timestamp at which the current user last viewed the
 * specified node.
 */
Dries's avatar
 
Dries committed
115 116
function node_last_viewed($nid) {
  global $user;
Dries's avatar
 
Dries committed
117
  static $history;
Dries's avatar
 
Dries committed
118

Dries's avatar
 
Dries committed
119 120 121 122 123
  if (!isset($history[$nid])) {
    $history[$nid] = db_fetch_object(db_query("SELECT timestamp FROM {history} WHERE uid = '$user->uid' AND nid = %d", $nid));
  }

  return ($history[$nid]->timestamp ? $history[$nid]->timestamp : 0);
Dries's avatar
 
Dries committed
124 125 126
}

/**
127
 * Decide on the type of marker to be displayed for a given node.
Dries's avatar
 
Dries committed
128
 *
Dries's avatar
 
Dries committed
129 130 131 132
 * @param $nid
 *   Node ID whose history supplies the "last viewed" timestamp.
 * @param $timestamp
 *   Time which is compared against node's "last viewed" timestamp.
133 134
 * @return
 *   One of the MARK constants.
Dries's avatar
 
Dries committed
135
 */
136
function node_mark($nid, $timestamp) {
Dries's avatar
 
Dries committed
137 138 139
  global $user;
  static $cache;

140 141 142
  if (!$user->uid) {
    return MARK_READ;
  }
Dries's avatar
Dries committed
143
  if (!isset($cache[$nid])) {
144
    $cache[$nid] = node_last_viewed($nid);
Dries's avatar
 
Dries committed
145
  }
146 147 148 149 150 151 152
  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
153 154
}

Dries's avatar
 
Dries committed
155
/**
156
 * Automatically generate a teaser for a node body in a given format.
Dries's avatar
 
Dries committed
157
 */
158
function node_teaser($body, $format = NULL) {
Dries's avatar
 
Dries committed
159

Dries's avatar
 
Dries committed
160
  $size = variable_get('teaser_length', 600);
Dries's avatar
 
Dries committed
161

Dries's avatar
 
Dries committed
162 163 164
  // find where the delimiter is in the body
  $delimiter = strpos($body, '<!--break-->');

165
  // If the size is zero, and there is no delimiter, the entire body is the teaser.
Dries's avatar
 
Dries committed
166
  if ($size == 0 && $delimiter == 0) {
Dries's avatar
 
Dries committed
167 168
    return $body;
  }
Dries's avatar
 
Dries committed
169

170 171 172 173 174
  // 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);
175
    if (isset($filters['filter/1']) && strpos($body, '<?') !== false) {
176 177
      return $body;
    }
178 179
  }

Dries's avatar
 
Dries committed
180
  // If a valid delimiter has been specified, use it to chop of the teaser.
Dries's avatar
 
Dries committed
181
  if ($delimiter > 0) {
Dries's avatar
 
Dries committed
182 183 184
    return substr($body, 0, $delimiter);
  }

185
  // If we have a short body, the entire body is the teaser.
Dries's avatar
 
Dries committed
186 187 188 189
  if (strlen($body) < $size) {
    return $body;
  }

Dries's avatar
 
Dries committed
190 191
  // In some cases, no delimiter has been specified (e.g. when posting using
  // the Blogger API). In this case, we try to split at paragraph boundaries.
192
  // When even the first paragraph is too long, we try to split at the end of
Dries's avatar
 
Dries committed
193
  // the next sentence.
Dries's avatar
Dries committed
194
  $breakpoints = array('</p>' => 4, '<br />' => 0, '<br>' => 0, "\n" => 0, '. ' => 1, '! ' => 1, '? ' => 1, '。' => 1, '؟ ' => 1);
195 196 197 198
  foreach ($breakpoints as $point => $charnum) {
    if ($length = strpos($body, $point, $size)) {
      return substr($body, 0, $length + $charnum);
    }
199
  }
Dries's avatar
Dries committed
200

201
  // If all else fails, we simply truncate the string.
202
  return truncate_utf8($body, $size);
Dries's avatar
 
Dries committed
203 204
}

205 206 207 208
function _node_names($op = '', $node = NULL) {
  static $node_names, $node_list;

  if (!isset($node_names)) {
209
    $node_names = module_invoke_all('node_info');
210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237
    foreach ($node_names as $type => $value) {
      $node_list[$type] = $value['name'];
    }
  }
  if ($node) {
    if (is_array($node)) {
      $type = $node['type'];
    }
    elseif (is_object($node)) {
      $type = $node->type;
    }
    elseif (is_string($node)) {
      $type = $node;
    }
    if (!isset($node_names[$type])) {
      return FALSE;
    }
  }
  switch ($op) {
    case 'base':
      return $node_names[$type]['base'];
    case 'list':
      return $node_list;
    case 'name':
      return $node_list[$type];
  }
}

238
/**
239
 * Determine the basename for hook_load etc.
Dries's avatar
 
Dries committed
240
 *
241
 * @param $node
Dries's avatar
 
Dries committed
242
 *   Either a node object, a node array, or a string containing the node type.
Dries's avatar
 
Dries committed
243
 * @return
244
 *   The basename for hook_load, hook_nodeapi etc.
Dries's avatar
 
Dries committed
245
 */
246 247 248
function node_get_base($node) {
  return _node_names('base', $node);
}
249

250 251 252 253 254 255 256 257 258 259
/**
 * Determine the human readable name for a given type.
 *
 * @param $node
 *   Either a node object, a node array, or a string containing the node type.
 * @return
 *   The human readable name of the node type.
 */
function node_get_name($node) {
  return _node_names('name', $node);
Dries's avatar
 
Dries committed
260
}
Dries's avatar
 
Dries committed
261

262
/**
263
 * Return the list of available node types.
Dries's avatar
 
Dries committed
264
 *
265 266
 * @param $node
 *   Either a node object, a node array, or a string containing the node type.
Dries's avatar
 
Dries committed
267
 * @return
268
 *   An array consisting (type => name) pairs.
Dries's avatar
 
Dries committed
269
 */
270 271
function node_get_types() {
  return _node_names('list');
Dries's avatar
 
Dries committed
272
}
Dries's avatar
 
Dries committed
273

274
/**
Dries's avatar
 
Dries committed
275 276 277 278 279 280 281 282 283 284
 * 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, $hook) {
285
  return module_hook(node_get_base($node), $hook);
Dries's avatar
 
Dries committed
286 287
}

288
/**
Dries's avatar
 
Dries committed
289 290 291 292 293 294 295 296 297
 * 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
298
 *   The returned value of the invoked hook.
Dries's avatar
 
Dries committed
299 300
 */
function node_invoke(&$node, $hook, $a2 = NULL, $a3 = NULL, $a4 = NULL) {
301 302
  if (node_hook($node, $hook)) {
    $function = node_get_base($node) ."_$hook";
Dries's avatar
 
Dries committed
303
    return ($function($node, $a2, $a3, $a4));
Dries's avatar
 
Dries committed
304 305 306
  }
}

Dries's avatar
 
Dries committed
307 308 309 310
/**
 * Invoke a hook_nodeapi() operation in all modules.
 *
 * @param &$node
Dries's avatar
 
Dries committed
311
 *   A node object.
Dries's avatar
 
Dries committed
312 313 314 315 316 317 318
 * @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
319
function node_invoke_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL) {
Dries's avatar
 
Dries committed
320
  $return = array();
321
  foreach (module_implements('nodeapi') as $name) {
Dries's avatar
 
Dries committed
322
    $function = $name .'_nodeapi';
323 324 325 326 327 328
    $result = $function($node, $op, $a3, $a4);
    if (is_array($result)) {
      $return = array_merge($return, $result);
    }
    else if (isset($result)) {
      $return[] = $result;
Dries's avatar
 
Dries committed
329 330 331 332 333
    }
  }
  return $return;
}

Dries's avatar
 
Dries committed
334 335 336
/**
 * Load a node object from the database.
 *
337 338
 * @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
339 340
 * @param $revision
 *   Which numbered revision to load. Defaults to the current version.
Dries's avatar
 
Dries committed
341 342
 * @param $reset
 *   Whether to reset the internal node_load cache.
Dries's avatar
 
Dries committed
343 344 345 346
 *
 * @return
 *   A fully-populated node object.
 */
347
function node_load($param = array(), $revision = NULL, $reset = NULL) {
Dries's avatar
 
Dries committed
348 349 350 351 352 353
  static $nodes = array();

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

354 355 356 357 358 359
  if (is_numeric($param)) {
    $cachable = $revision == NULL;
    if ($cachable && $nodes[$param]) {
      return $nodes[$param];
    }
    $cond = 'n.nid = '. $param;
Dries's avatar
 
Dries committed
360
  }
361 362
  else {
    // Turn the conditions into a query.
363
    foreach ($param as $key => $value) {
364 365 366
      $cond[] = 'n.'. db_escape_string($key) ." = '". db_escape_string($value) ."'";
    }
    $cond = implode(' AND ', $cond);
Dries's avatar
 
Dries committed
367 368
  }

Dries's avatar
 
Dries committed
369
  // Retrieve the node.
370 371
  if ($revision) {
    $node = db_fetch_object(db_query(db_rewrite_sql('SELECT n.nid, r.vid, n.type, n.status, n.created, n.changed, n.comment, n.promote, n.moderate, 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), $revision));
Dries's avatar
 
Dries committed
372
  }
373 374
  else {
    $node = db_fetch_object(db_query(db_rewrite_sql('SELECT n.nid, n.vid, n.type, n.status, n.created, n.changed, n.comment, n.promote, n.moderate, 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)));
Dries's avatar
 
Dries committed
375 376
  }

377 378 379 380 381 382 383
  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
384 385
    }

386 387 388 389 390
    if ($extra = node_invoke_nodeapi($node, 'load')) {
      foreach ($extra as $key => $value) {
        $node->$key = $value;
      }
    }
Dries's avatar
 
Dries committed
391 392
  }

Dries's avatar
 
Dries committed
393
  if ($cachable) {
394
    $nodes[$param] = $node;
Dries's avatar
 
Dries committed
395 396
  }

Dries's avatar
 
Dries committed
397 398 399
  return $node;
}

Dries's avatar
 
Dries committed
400 401 402
/**
 * Save a node object into the database.
 */
403
function node_save($node) {
404
  global $user;
Dries's avatar
 
Dries committed
405

406
  $node->is_new = false;
Dries's avatar
 
Dries committed
407

Dries's avatar
 
Dries committed
408
  // Apply filters to some default node fields:
Dries's avatar
 
Dries committed
409
  if (empty($node->nid)) {
Dries's avatar
 
Dries committed
410
    // Insert a new node.
411
    $node->is_new = true;
Dries's avatar
 
Dries committed
412

Dries's avatar
 
Dries committed
413
    // Set some required fields:
414 415 416
    if (!$node->created) {
      $node->created = time();
    }
Dries's avatar
 
Dries committed
417
    $node->nid = db_next_id('{node}_nid');
418 419 420 421 422 423 424
    $node->vid = db_next_id('{node_revisions}_vid');;
  }
  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
425
    }
426
    $node = $node_current;
Dries's avatar
 
Dries committed
427

428 429 430 431 432 433
    if ($node->revision) {
      $node->old_vid = $node->vid;
      $node->vid = db_next_id('{node_revisions}_vid');
      // We always update the timestamp for new revisions.
      $node->changed = time();
    }
Dries's avatar
 
Dries committed
434 435
  }

436
  if (!$node->changed) {
Dries's avatar
 
Dries committed
437
    $node->changed = time();
438
  }
Dries's avatar
 
Dries committed
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
  // Split off revisions data to another structure
  $revisions_table_values = array('nid' => $node->nid, 'vid' => $node->vid,
                     'title' => $node->title, 'body' => $node->body,
                     'teaser' => $node->teaser, 'log' => $node->log, 'timestamp' => $node->changed,
                     'uid' => $user->uid, 'format' => $node->format);
  $revisions_table_types = array('nid' => '%d', 'vid' => '%d',
                     'title' => "'%s'", 'body' => "'%s'",
                     'teaser' => "'%s'", 'log' => "'%s'", 'timestamp' => '%d',
                     'uid' => '%d', 'format' => '%d');
  $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,
                    'promote' => $node->promote, 'moderate' => $node->moderate,
                    'sticky' => $node->sticky);
  $node_table_types = array('nid' => '%d', 'vid' => '%d',
                    'title' => "'%s'", 'type' => "'%s'", 'uid' => '%d',
                    'status' => '%d', 'created' => '%d',
                    'changed' => '%d', 'comment' => '%d',
                    'promote' => '%d', 'moderate' => '%d',
                    'sticky' => '%d');

  //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(', ', $arr) .' WHERE nid = %d';
    if ($node->revision) {
      $revisions_query = 'INSERT INTO {node_revisions} ('. implode(', ', array_keys($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
482
      }
483 484
      $revisions_table_values[] = $node->vid;
      $revisions_query = 'UPDATE {node_revisions} SET '. implode(', ', $arr) .' WHERE vid = %d';
Dries's avatar
 
Dries committed
485
    }
486
  }
Dries's avatar
 
Dries committed
487

488 489 490
  // 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
491

492 493 494 495 496 497
  // Call the node specific callback (if any):
  if ($node->is_new) {
    node_invoke($node, 'insert');
    node_invoke_nodeapi($node, 'insert');
  }
  else {
Dries's avatar
 
Dries committed
498 499
    node_invoke($node, 'update');
    node_invoke_nodeapi($node, 'update');
Dries's avatar
 
Dries committed
500 501
  }

Dries's avatar
 
Dries committed
502
  // Clear the cache so an anonymous poster can see the node being added or updated.
Dries's avatar
 
Dries committed
503 504
  cache_clear_all();

Dries's avatar
 
Dries committed
505
  // Return the node ID:
506
  return $node;
Dries's avatar
 
Dries committed
507 508
}

Dries's avatar
 
Dries committed
509 510 511 512 513 514
/**
 * Generate a display of the given node.
 *
 * @param $node
 *   A node array or node object.
 * @param $teaser
515
 *   Whether to display the teaser only, as on the main page.
Dries's avatar
 
Dries committed
516 517
 * @param $page
 *   Whether the node is being displayed by itself as a page.
518 519
 * @param $links
 *   Whether or not to display node links. Links are omitted for node previews.
Dries's avatar
 
Dries committed
520 521 522 523
 *
 * @return
 *   An HTML representation of the themed node.
 */
524
function node_view($node, $teaser = FALSE, $page = FALSE, $links = TRUE) {
Dries's avatar
 
Dries committed
525
  $node = array2object($node);
Dries's avatar
 
Dries committed
526

527
  // Remove the delimiter (if any) that separates the teaser from the body.
Dries's avatar
 
Dries committed
528
  // TODO: this strips legitimate uses of '<!--break-->' also.
Dries's avatar
 
Dries committed
529
  $node->body = str_replace('<!--break-->', '', $node->body);
Dries's avatar
 
Dries committed
530

531 532 533 534
  if ($node->log != '' && !$teaser && $node->moderate) {
    $node->body .= '<div class="log"><div class="title">'. t('Log') .':</div>'. $node->log .'</div>';
  }

Dries's avatar
 
Dries committed
535 536
  // The 'view' hook can be implemented to overwrite the default function
  // to display nodes.
Dries's avatar
 
Dries committed
537
  if (node_hook($node, 'view')) {
Dries's avatar
 
Dries committed
538
    node_invoke($node, 'view', $teaser, $page);
Dries's avatar
 
Dries committed
539 540
  }
  else {
Dries's avatar
 
Dries committed
541
    $node = node_prepare($node, $teaser);
Dries's avatar
 
Dries committed
542
  }
Dries's avatar
 
Dries committed
543 544
  // Allow modules to change $node->body before viewing.
  node_invoke_nodeapi($node, 'view', $teaser, $page);
545 546 547
  if ($links) {
    $node->links = module_invoke_all('link', 'node', $node, !$page);
  }
548 549 550 551 552 553 554
  // unset unused $node part so that a bad theme can not open a security hole
  if ($teaser) {
    unset($node->body);
  }
  else {
    unset($node->teaser);
  }
Dries's avatar
 
Dries committed
555 556

  return theme('node', $node, $teaser, $page);
Dries's avatar
 
Dries committed
557
}
Dries's avatar
 
Dries committed
558

Dries's avatar
 
Dries committed
559 560 561
/**
 * Apply filters to a node in preparation for theming.
 */
Dries's avatar
 
Dries committed
562
function node_prepare($node, $teaser = FALSE) {
Dries's avatar
 
Dries committed
563
  $node->readmore = (strlen($node->teaser) < strlen($node->body));
Dries's avatar
 
Dries committed
564
  if ($teaser == FALSE) {
565
    $node->body = check_markup($node->body, $node->format, FALSE);
Dries's avatar
 
Dries committed
566 567
  }
  else {
568
    $node->teaser = check_markup($node->teaser, $node->format, FALSE);
Dries's avatar
 
Dries committed
569
  }
Dries's avatar
 
Dries committed
570
  return $node;
Dries's avatar
 
Dries committed
571 572
}

Dries's avatar
 
Dries committed
573 574 575
/**
 * Generate a page displaying a single node, along with its comments.
 */
Dries's avatar
 
Dries committed
576
function node_show($node, $cid) {
Dries's avatar
 
Dries committed
577
  $output = node_view($node, FALSE, TRUE);
Dries's avatar
 
Dries committed
578

Dries's avatar
 
Dries committed
579 580
  if (function_exists('comment_render') && $node->comment) {
    $output .= comment_render($node, $cid);
Dries's avatar
 
Dries committed
581 582
  }

Dries's avatar
 
Dries committed
583 584
  // Update the history table, stating that this user viewed this node.
  node_tag_new($node->nid);
Dries's avatar
 
Dries committed
585

Dries's avatar
 
Dries committed
586
  return $output;
Dries's avatar
 
Dries committed
587 588
}

Dries's avatar
 
Dries committed
589 590 591
/**
 * Implementation of hook_perm().
 */
Dries's avatar
 
Dries committed
592
function node_perm() {
Dries's avatar
 
Dries committed
593
  return array('administer nodes', 'access content');
Dries's avatar
 
Dries committed
594 595
}

Dries's avatar
 
Dries committed
596 597 598
/**
 * Implementation of hook_search().
 */
599 600 601 602
function node_search($op = 'search', $keys = null) {
  switch ($op) {
    case 'name':
      return t('content');
Dries's avatar
Dries committed
603 604 605
    case 'reset':
      variable_del('node_cron_last');
      return;
606 607 608
    case 'status':
      $last = variable_get('node_cron_last', 0);
      $total = db_result(db_query('SELECT COUNT(*) FROM {node} WHERE status = 1 AND moderate = 0'));
Steven Wittens's avatar
Steven Wittens committed
609
      $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 n.moderate = 0 AND (n.created > %d OR n.changed > %d OR c.last_comment_timestamp > %d)', $last, $last, $last));
610
      return array('remaining' => $remaining, 'total' => $total);
611
    case 'search':
612
      list($join, $where) = _db_rewrite_sql();
613
      $find = do_search($keys, 'node', 'INNER JOIN {node} n ON n.nid = i.sid '. $join .' INNER JOIN {users} u ON n.uid = u.uid', 'n.status = 1'. (empty($where) ? '' : ' AND '. $where));
614 615
      $results = array();
      foreach ($find as $item) {
616
        $node = node_load($item);
617 618 619 620 621 622 623 624 625 626 627

        // Get node output (filtered and with module-specific fields).
        if (node_hook($node, 'view')) {
          node_invoke($node, 'view', false, false);
        }
        else {
          $node = node_prepare($node, false);
        }
        // Allow modules to change $node->body before viewing.
        node_invoke_nodeapi($node, 'view', false, false);

Dries's avatar
Dries committed
628
        $extra = node_invoke_nodeapi($node, 'search result');
629
        $results[] = array('link' => url('node/'. $item),
630
                           'type' => node_get_name($node),
631
                           'title' => $node->title,
632
                           'user' => theme('username', $node),
633
                           'date' => $node->changed,
Dries's avatar
Dries committed
634
                           'extra' => $extra,
635
                           'snippet' => search_excerpt($keys, $node->body));
636 637 638
      }
      return $results;
  }
Dries's avatar
 
Dries committed
639 640
}

Dries's avatar
 
Dries committed
641
/**
Dries's avatar
 
Dries committed
642
 * Menu callback; presents general node configuration options.
Dries's avatar
 
Dries committed
643 644 645 646 647 648
 */
function node_configure() {
  if ($_POST) {
    system_settings_save();
  }

Dries's avatar
 
Dries committed
649
  $output .= form_select(t('Number of posts on main page'), 'default_nodes_main', variable_get('default_nodes_main', 10), drupal_map_assoc(array(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30)), t('The default maximum number of posts to display per page on overview pages such as the main page.'));
650
  $output .= form_select(t('Length of trimmed posts'), 'teaser_length', variable_get('teaser_length', 600), array(0 => t('Unlimited'), 200 => t('200 characters'), 400 => t('400 characters'), 600 => t('600 characters'), 800 => t('800 characters'), 1000 => t('1000 characters'), 1200 => t('1200 characters'), 1400 => t('1400 characters'), 1600 => t('1600 characters'), 1800 => t('1800 characters'), 2000 => t('2000 characters')), t("The maximum number of characters used in the trimmed version of a post.  Drupal will use this setting to determine at which offset long posts should be trimmed.  The trimmed version of a post is typically used as a teaser when displaying the post on the main page, in XML feeds, etc.  To disable teasers, set to 'Unlimited'. Note that this setting will only affect new or updated content and will not affect existing teasers."));
Dries's avatar
 
Dries committed
651
  $output .= form_radios(t('Preview post'), 'node_preview', variable_get('node_preview', 0), array(t('Optional'), t('Required')), t('Must users preview posts before submitting?'));
Dries's avatar
 
Dries committed
652

Dries's avatar
 
Dries committed
653
  return system_settings_form($output);
Dries's avatar
 
Dries committed
654 655
}

Dries's avatar
 
Dries committed
656 657 658
/**
 * Retrieve the comment mode for the given node ID (none, read, or read/write).
 */
Dries's avatar
 
Dries committed
659
function node_comment_mode($nid) {
Dries's avatar
 
Dries committed
660 661
  static $comment_mode;
  if (!isset($comment_mode[$nid])) {
Dries's avatar
 
Dries committed
662
    $comment_mode[$nid] = db_result(db_query('SELECT comment FROM {node} WHERE nid = %d', $nid));
Dries's avatar
 
Dries committed
663 664
  }
  return $comment_mode[$nid];
Dries's avatar
 
Dries committed
665 666
}

Dries's avatar
 
Dries committed
667 668 669
/**
 * Implementation of hook_link().
 */
670
function node_link($type, $node = 0, $main = 0) {
Dries's avatar
 
Dries committed
671 672
  $links = array();

Dries's avatar
 
Dries committed
673
  if ($type == 'node') {
Dries's avatar
 
Dries committed
674
    if (array_key_exists('links', $node)) {
Kjartan's avatar
Kjartan committed
675 676
      $links = $node->links;
    }
Dries's avatar
 
Dries committed
677

Dries's avatar
 
Dries committed
678
    if ($main == 1 && $node->teaser && $node->readmore) {
Dries's avatar
 
Dries committed
679
      $links[] = l(t('read more'), "node/$node->nid", array('title' => t('Read the rest of this posting.'), 'class' => 'read-more'));
Dries's avatar
 
Dries committed
680
    }
Dries's avatar
 
Dries committed
681 682
  }

Dries's avatar
 
Dries committed
683
  return $links;
Dries's avatar
 
Dries committed
684 685
}

Dries's avatar
 
Dries committed
686 687 688
/**
 * Implementation of hook_menu().
 */
Dries's avatar
 
Dries committed
689
function node_menu($may_cache) {
Dries's avatar
 
Dries committed
690 691
  $items = array();

Dries's avatar
 
Dries committed
692 693
  if ($may_cache) {
    $items[] = array('path' => 'admin/node', 'title' => t('content'),
Dries's avatar
 
Dries committed
694
      'callback' => 'node_admin',
Dries's avatar
 
Dries committed
695
      'access' => user_access('administer nodes'));
696 697
    $items[] = array('path' => 'admin/node/action', 'title' => t('content'),
      'type' => MENU_CALLBACK);
Dries's avatar
 
Dries committed
698 699
    $items[] = array('path' => 'admin/node/overview', 'title' => t('list'),
      'type' => MENU_DEFAULT_LOCAL_TASK, 'weight' => -10);
700
    $items[] = array('path' => 'admin/settings/node', 'title' => t('posts'),
Dries's avatar
 
Dries committed
701
      'callback' => 'node_configure',
702 703
      'access' => user_access('administer nodes'));
    $items[] = array('path' => 'admin/settings/content-types', 'title' => t('content types'),
704
      'callback' => 'node_types_configure',
705
      'access' => user_access('administer nodes'));
Dries's avatar
 
Dries committed
706 707 708 709 710 711
    if (module_exist('search')) {
      $items[] = array('path' => 'admin/node/search', 'title' => t('search'),
        'callback' => 'node_admin',
        'access' => user_access('administer nodes'),
        'type' => MENU_LOCAL_TASK);
    }
Dries's avatar
 
Dries committed
712

Dries's avatar
 
Dries committed
713
    $items[] = array('path' => 'node', 'title' => t('content'),
Dries's avatar
 
Dries committed
714
      'callback' => 'node_page',
Dries's avatar
 
Dries committed
715 716 717
      'access' => user_access('access content'),
      'type' => MENU_SUGGESTED_ITEM);
    $items[] = array('path' => 'node/add', 'title' => t('create content'),
Dries's avatar
 
Dries committed
718
      'callback' => 'node_page',
Dries's avatar
 
Dries committed
719 720 721 722 723 724
      'access' => user_access('access content'),
      'type' => MENU_ITEM_GROUPING,
      'weight' => 1);
  }
  else {
    if (arg(0) == 'node' && is_numeric(arg(1))) {
725
      $node = node_load(arg(1));
726 727
      if ($node->nid) {
        $items[] = array('path' => 'node/'. arg(1), 'title' => t('view'),
Dries's avatar
 
Dries committed
728
          'callback' => 'node_page',
729 730 731 732 733 734 735 736
          'access' => node_access('view', $node),
          'type' => MENU_CALLBACK);
        $items[] = array('path' => 'node/'. arg(1) .'/view', 'title' => t('view'),
            'type' => MENU_DEFAULT_LOCAL_TASK, 'weight' => -10);
        $items[] = array('path' => 'node/'. arg(1) .'/edit', 'title' => t('edit'),
          'callback' => 'node_page',
          'access' => node_access('update', $node),
          'weight' => 1,
Dries's avatar
 
Dries committed
737
          'type' => MENU_LOCAL_TASK);
738
        $items[] = array('path' => 'node/'. arg(1) .'/delete', 'title' => t('delete'),
739
          'callback' => 'node_delete_page',
740 741 742
          'access' => node_access('delete', $node),
          'weight' => 1,
          'type' => MENU_CALLBACK);
743
        if (user_access('administer nodes') && db_result(db_query('SELECT COUNT(vid) FROM {node_revisions} WHERE nid = %d', arg(1))) > 1) {
744 745 746 747 748 749
          $items[] = array('path' => 'node/'. arg(1) .'/revisions', 'title' => t('revisions'),
            'callback' => 'node_page',
            'access' => user_access('administer nodes'),
            'weight' => 2,
            'type' => MENU_LOCAL_TASK);
        }
Dries's avatar
 
Dries committed
750
      }
751
    }
752 753
    else if (arg(0) == 'admin' && arg(1) == 'settings' && arg(2) == 'content-types' && is_string(arg(3))) {
      $items[] = array('path' => 'admin/settings/content-types/'. arg(3),
754
        'title' => t("'%name' content type", array('%name' => node_get_name(arg(3)))),
755 756
        'type' => MENU_CALLBACK);
    }
Dries's avatar
 
Dries committed
757 758 759 760 761
  }

  return $items;
}

762 763 764 765 766
function node_last_changed($nid) {
  $node = db_fetch_object(db_query('SELECT changed FROM {node} WHERE nid = %d', $nid));
  return ($node->changed);
}

Dries's avatar
 
Dries committed
767
/**
Dries's avatar
 
Dries committed
768
 * Generate the content administration overview.
Dries's avatar
 
Dries committed
769
 */
Dries's avatar
 
Dries committed
770
function node_admin_nodes() {
771 772 773
  /*
  ** Operations
  */
Dries's avatar
 
Dries committed
774
  $operations = array(
775 776 777 778 779 780
    'approve' =>   array(t('Approve the selected posts'), 'UPDATE {node} SET status = 1, moderate = 0 WHERE nid = %d'),
    'promote' =>   array(t('Promote the selected posts'), 'UPDATE {node} SET status = 1, promote = 1 WHERE nid = %d'),
    'sticky' =>    array(t('Make the selected posts sticky'), 'UPDATE {node} SET status = 1, sticky = 1 WHERE nid = %d'),
    'demote' =>    array(t('Demote the selected posts'), 'UPDATE {node} SET promote = 0 WHERE nid = %d'),
    'unpublish' => array(t('Unpublish the selected posts'), 'UPDATE {node} SET status = 0 WHERE nid = %d'),
    'delete' =>    array(t('Delete the selected posts'), '')
Dries's avatar
 
Dries committed
781
  );
Dries's avatar
 
Dries committed
782

783
  // Handle operations
784 785
  $op = $_POST['op'];

786
  $edit = $_POST['edit'];
787
  if (($op == t('Update') || $op == t('Delete all')) && isset($edit['operation']) && isset($edit['nodes'])) {
788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811
    $edit['nodes'] = array_diff($edit['nodes'], array(0));
    if (count($edit['nodes']) == 0) {
      form_set_error('', t('Please select some items to perform the update on.'));
    }
    else {
      if ($operations[$edit['operation']][1]) {
        // Flag changes
       $operation = $operations[$edit['operation']][1];
        foreach ($edit['nodes'] as $nid => $value) {
          if ($value) {
            db_query($operation, $nid);
          }
        }
        drupal_set_message(t('The update has been performed.'));
      }
      else if ($edit['operation'] == 'delete') {
        // Mass delete
        if ($edit['confirm']) {
          foreach ($edit['nodes'] as $nid => $value) {
            node_delete(array('nid' => $nid, 'confirm' => 1));
          }
          drupal_set_message(t('The items have been deleted.'));
        }
        else {
812
          $extra = '<ul>';
813 814 815
          foreach ($edit['nodes'] as $nid => $value) {
            if ($value) {
              $title = db_result(db_query('SELECT title FROM {node} WHERE nid = %d', $nid));
816
              $extra .= '<li>'. form_hidden('nodes]['. $nid, 1) . check_plain($title) .'</li>';
817 818
            }
          }
819 820 821 822 823 824 825 826 827 828
          $extra .= '</ul>';
          $extra .= form_hidden('operation', 'delete');

          $output = theme('confirm',
                          t('Are you sure you want to delete these items?'),
                          'admin/node',
                          t('This action cannot be undone.'),
                          t('Delete all'),
                          t('Cancel'),
                          $extra);
829 830
          return $output;
        }
Dries's avatar
 
Dries committed
831 832
      }
    }
833
  }
Dries's avatar
 
Dries committed
834

835 836 837 838 839
  /*
  ** Filters
  */
  // Regular filters
  $filters = array(
840
    'status'   => array('title' => t('status'),
841 842 843 844
                        'options' => array('status-1'   => t('published'),     'status-0' => t('not published'),
                                           'moderate-1' => t('in moderation'), 'moderate-0' => t('not in moderation'),
                                           'promote-1'  => t('promoted'),      'promote-0' => t('not promoted'),
                                           'sticky-1'   => t('sticky'),        'sticky-0' => t('not sticky'))),
845
    'type'     => array('title' => t('type'), 'where' => "n.type = '%s'",
846
                        'options' => node_get_types()));
847 848 849 850 851 852 853 854 855
  // Merge all vocabularies into one for retrieving $value below
  if ($taxonomy = module_invoke('taxonomy', 'form_all')) {
    $terms = array();
    foreach ($taxonomy as $key => $value) {
      $terms = $terms + $value;
    }
    $filters['category'] = array('title' => t('category'), 'where' => 'tn.tid = %d',
                                 'options' => $terms, 'join' => 'INNER JOIN {term_node} tn ON n.nid = tn.nid');
  }
856 857

  // Initialize/reset filters
858
  if (!isset($_SESSION['node_overview_filter']) || !is_array($_SESSION['node_overview_filter']) || $op == t('Reset')) {
859 860 861 862 863 864 865 866 867 868 869 870 871 872
    $_SESSION['node_overview_filter'] = array();
  }
  $session = &$_SESSION['node_overview_filter'];
  $filter = $edit['filter'];
  if (($op == t('Filter') || $op == t('Refine')) && isset($filter)) {
    if (isset($filters[$filter]['options'][$edit[$filter]])) {
      $session[] = array($filter, $edit[$filter]);
    }
  }
  if ($op == t('Undo')) {
    array_pop($session);
  }
  if ($op != '') {
    drupal_goto('admin/node');
Dries's avatar
 
Dries committed
873 874
  }

875 876 877 878 879 880 881 882 883 884 885 886
  /*
  ** Form
  */
  $output .= '<div id="node-admin-filter">';
  // Existing filters
  $form = '<ul>';
  $i = 0;
  foreach ($session as $filter) {
    list($type, $value) = $filter;
    $params = array('%a' => '<strong>'. $filters[$type]['title'] .'</strong>', '%b' => '<strong>'. $filters[$type]['options'][$value] .'</strong>');
    $form .= '<li>'. ($i++ ? t('<em>and</em> where <strong>%a</strong> is <strong>%b</strong>', $params) : t('<strong>%a</strong> is <strong>%b</strong>', $params)) .'</li>';
  }
Dries's avatar
Dries committed
887

888
  // New filter form
889 890 891
  if (isset($filters['category'])) {
    $filters['category']['options'] = $taxonomy;
  }
892
  $values = '';
Dries's avatar
 
Dries committed
893 894
  $options = array();
  foreach ($filters as $key => $value) {
895 896
    $options[$key] = $value['title'];
    $b .= form_select('', $key, 1, $filters[$key]['options']);
Steven Wittens's avatar
Steven Wittens committed
897
  }
Dries's avatar
 
Dries committed
898

899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918
  $buttons = '';
  if (count($options)) {
    $form .= '<li><dl class="multiselect">';
    $a = '';
    foreach ($options as $key => $value) {
      $a .= form_radio($value, 'filter', $key);
    }
    if (!$i) {
      $form .= t('<dd class="a">%a</dd> <dt>is</dt> <dd class="b">%b</dd>', array('%a' => $a, '%b' => $b));
    }
    else {
      $form .= t('<dt><em>and</em> where</dt> <dd class="a">%a</dd> <dt>is</dt> <dd class="b">%b</dd>', array('%a' => $a, '%b' => $b));
    }
    $form .= '</dl>';
    $buttons = form_submit(count($session) ? t('Refine') : t('Filter'));
  }
  if (count($session)) {
    $buttons .= form_submit(t('Undo')) . form_submit(t('Reset'));
  }
  $form .= '<div class="container-inline" id="node-admin-buttons">'. $buttons .'</div>';
919
  $form .= '</li></ul><br class="clear" />';
920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938
  $output