source: branches/2.2/include/functions_comment.inc.php @ 10123

Revision 10123, 11.0 KB checked in by mistic100, 9 years ago (diff)

merge r10097 & r10122 from trunk

  • Property svn:eol-style set to LF
Line 
1<?php
2// +-----------------------------------------------------------------------+
3// | Piwigo - a PHP based photo gallery                                    |
4// +-----------------------------------------------------------------------+
5// | Copyright(C) 2008-2011 Piwigo Team                  http://piwigo.org |
6// | Copyright(C) 2003-2008 PhpWebGallery Team    http://phpwebgallery.net |
7// | Copyright(C) 2002-2003 Pierrick LE GALL   http://le-gall.net/pierrick |
8// +-----------------------------------------------------------------------+
9// | This program is free software; you can redistribute it and/or modify  |
10// | it under the terms of the GNU General Public License as published by  |
11// | the Free Software Foundation                                          |
12// |                                                                       |
13// | This program is distributed in the hope that it will be useful, but   |
14// | WITHOUT ANY WARRANTY; without even the implied warranty of            |
15// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      |
16// | General Public License for more details.                              |
17// |                                                                       |
18// | You should have received a copy of the GNU General Public License     |
19// | along with this program; if not, write to the Free Software           |
20// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
21// | USA.                                                                  |
22// +-----------------------------------------------------------------------+
23
24//returns string action to perform on a new comment: validate, moderate, reject
25function user_comment_check($action, $comment)
26{
27  global $conf,$user;
28
29  if ($action=='reject')
30    return $action;
31
32  $my_action = $conf['comment_spam_reject'] ? 'reject':'moderate';
33
34  if ($action==$my_action)
35    return $action;
36
37  // we do here only BASIC spam check (plugins can do more)
38  if ( !is_a_guest() )
39    return $action;
40
41  $link_count = preg_match_all( '/https?:\/\//',
42    $comment['content'], $matches);
43
44  if ( strpos($comment['author'], 'http://')!==false )
45  {
46    $link_count++;
47  }
48
49  if ( $link_count>$conf['comment_spam_max_links'] )
50    return $my_action;
51
52  return $action;
53}
54
55
56add_event_handler('user_comment_check', 'user_comment_check',
57  EVENT_HANDLER_PRIORITY_NEUTRAL, 2);
58
59/**
60 * Tries to insert a user comment in the database and returns one of :
61 * validate, moderate, reject
62 * @param array comm contains author, content, image_id
63 * @param string key secret key sent back to the browser
64 * @param array infos out array of messages
65 */
66function insert_user_comment( &$comm, $key, &$infos )
67{
68  global $conf, $user;
69
70  $comm = array_merge( $comm,
71    array(
72      'ip' => $_SERVER['REMOTE_ADDR'],
73      'agent' => $_SERVER['HTTP_USER_AGENT']
74    )
75   );
76
77  $infos = array();
78  if (!$conf['comments_validation'] or is_admin())
79  {
80    $comment_action='validate'; //one of validate, moderate, reject
81  }
82  else
83  {
84    $comment_action='moderate'; //one of validate, moderate, reject
85  }
86
87  // display author field if the user status is guest or generic
88  if (!is_classic_user())
89  {
90    if ( empty($comm['author']) )
91    {
92      $comm['author'] = 'guest';
93    }
94    $comm['author_id'] = $conf['guest_id'];
95    // if a guest try to use the name of an already existing user, he must be
96    // rejected
97    if ( $comm['author'] != 'guest' )
98    {
99      $query = '
100SELECT COUNT(*) AS user_exists
101  FROM '.USERS_TABLE.'
102  WHERE '.$conf['user_fields']['username']." = '".addslashes($comm['author'])."'";
103      $row = pwg_db_fetch_assoc( pwg_query( $query ) );
104      if ( $row['user_exists'] == 1 )
105      {
106        array_push($infos, l10n('This login is already used by another user') );
107        $comment_action='reject';
108      }
109    }
110  }
111  else
112  {
113    $comm['author'] = addslashes($user['username']);
114    $comm['author_id'] = $user['id'];
115  }
116
117  if ( empty($comm['content']) )
118  { // empty comment content
119    $comment_action='reject';
120  }
121
122  if ( !verify_ephemeral_key(@$key, $comm['image_id']) )
123  {
124    $comment_action='reject';
125  }
126
127  if ($comment_action!='reject' and $conf['anti-flood_time']>0 and !is_admin())
128  { // anti-flood system
129    $reference_date = pwg_db_get_flood_period_expression($conf['anti-flood_time']);
130
131    $query = '
132SELECT count(1) FROM '.COMMENTS_TABLE.'
133  WHERE date > '.$reference_date.'
134    AND author_id = '.$comm['author_id'];
135    list($counter) = pwg_db_fetch_row(pwg_query($query));
136    if ( $counter > 0 )
137    {
138      array_push( $infos, l10n('Anti-flood system : please wait for a moment before trying to post another comment') );
139      $comment_action='reject';
140    }
141  }
142
143  // perform more spam check
144  $comment_action = trigger_event('user_comment_check',
145      $comment_action, $comm
146    );
147
148  if ( $comment_action!='reject' )
149  {
150    $query = '
151INSERT INTO '.COMMENTS_TABLE.'
152  (author, author_id, content, date, validated, validation_date, image_id)
153  VALUES (
154    \''.$comm['author'].'\',
155    '.$comm['author_id'].',
156    \''.$comm['content'].'\',
157    NOW(),
158    \''.($comment_action=='validate' ? 'true':'false').'\',
159    '.($comment_action=='validate' ? 'NOW()':'NULL').',
160    '.$comm['image_id'].'
161  )
162';
163
164    pwg_query($query);
165
166    $comm['id'] = pwg_db_insert_id(COMMENTS_TABLE);
167
168    if ($conf['email_admin_on_comment']
169        or ($conf['email_admin_on_comment_validation'] and 'moderate' == $comment_action))
170    {
171      include_once(PHPWG_ROOT_PATH.'include/functions_mail.inc.php');
172
173      $comment_url = get_absolute_root_url().'comments.php?comment_id='.$comm['id'];
174
175      $keyargs_content = array
176      (
177        get_l10n_args('Author: %s', stripslashes($comm['author']) ),
178        get_l10n_args('Comment: %s', stripslashes($comm['content']) ),
179        get_l10n_args('', ''),
180        get_l10n_args('Manage this user comment: %s', $comment_url)
181      );
182
183      if ('moderate' == $comment_action)
184      {
185        $keyargs_content[] = get_l10n_args('', '');
186        $keyargs_content[] = get_l10n_args('(!) This comment requires validation', '');
187      }
188
189      pwg_mail_notification_admins
190      (
191        get_l10n_args('Comment by %s', stripslashes($comm['author']) ),
192        $keyargs_content
193      );
194    }
195  }
196  return $comment_action;
197}
198
199/**
200 * Tries to delete a user comment in the database
201 * only admin can delete all comments
202 * other users can delete their own comments
203 * so to avoid a new sql request we add author in where clause
204 *
205 * @param comment_id
206 */
207function delete_user_comment($comment_id) {
208  $user_where_clause = '';
209  if (!is_admin())
210  {
211    $user_where_clause = '   AND author_id = \''.$GLOBALS['user']['id'].'\'';
212  }
213  $query = '
214DELETE FROM '.COMMENTS_TABLE.'
215  WHERE id = '.$comment_id.
216$user_where_clause.'
217;';
218  $result = pwg_query($query);
219  if ($result) {
220    email_admin('delete', 
221                array('author' => $GLOBALS['user']['username'],
222                      'comment_id' => $comment_id
223                  ));
224  }
225}
226
227/**
228 * Tries to update a user comment in the database
229 * only admin can update all comments
230 * users can edit their own comments if admin allow them
231 * so to avoid a new sql request we add author in where clause
232 *
233 * @param comment_id
234 * @param post_key
235 * @param content
236 */
237
238function update_user_comment($comment, $post_key)
239{
240  global $conf;
241
242  $comment_action = 'validate';
243
244  if ( !verify_ephemeral_key($post_key, $comment['image_id']) )
245  {
246    $comment_action='reject';
247  }
248
249  // perform more spam check
250  $comment_action =
251    trigger_event('user_comment_check',
252                  $comment_action,
253                  array_merge($comment,
254                              array('author' => $GLOBALS['user']['username'])
255                              )
256                  );
257
258  if ( $comment_action!='reject' )
259  {
260    $user_where_clause = '';
261    if (!is_admin())
262    {
263      $user_where_clause = '   AND author_id = \''.
264        $GLOBALS['user']['id'].'\'';
265    }
266   
267    // should the updated comment must be validated
268    if (!$conf['comments_validation'] or is_admin())
269    {
270      $comment_action='validate'; //one of validate, moderate, reject
271    }
272    else
273    {
274      $comment_action='moderate'; //one of validate, moderate, reject
275    }
276
277    $query = '
278UPDATE '.COMMENTS_TABLE.'
279  SET content = \''.$comment['content'].'\',
280      validated = \''.($comment_action=='validate' ? 'true':'false').'\',
281      validation_date = '.($comment_action=='validate' ? 'NOW()':'NULL').'
282  WHERE id = '.$comment['comment_id'].
283$user_where_clause.'
284;';
285    $result = pwg_query($query);
286   
287    // mail admin and ask to validate the comment
288    if ($result and $conf['email_admin_on_comment_validation'] and 'moderate' == $comment_action) 
289    {
290      include_once(PHPWG_ROOT_PATH.'include/functions_mail.inc.php');
291
292      $comment_url = get_absolute_root_url().'comments.php?comment_id='.$comment['comment_id'];
293
294      $keyargs_content = array
295      (
296        get_l10n_args('Author: %s', stripslashes($GLOBALS['user']['username']) ),
297        get_l10n_args('Comment: %s', stripslashes($comment['content']) ),
298        get_l10n_args('', ''),
299        get_l10n_args('Manage this user comment: %s', $comment_url),
300        get_l10n_args('', ''),
301        get_l10n_args('(!) This comment requires validation', ''),
302      );
303
304      pwg_mail_notification_admins
305      (
306        get_l10n_args('Comment by %s', stripslashes($GLOBALS['user']['username']) ),
307        $keyargs_content
308      );
309    }
310    // just mail admin
311    else if ($result)
312    {
313      email_admin('edit', array('author' => $GLOBALS['user']['username'],
314                                'content' => stripslashes($comment['content'])) );
315    }
316  }
317 
318  return $comment_action;
319}
320
321function email_admin($action, $comment)
322{
323  global $conf;
324
325  if (!in_array($action, array('edit', 'delete'))
326      or (($action=='edit') and !$conf['email_admin_on_comment_edition'])
327      or (($action=='delete') and !$conf['email_admin_on_comment_deletion']))
328  {
329    return;
330  }
331
332  include_once(PHPWG_ROOT_PATH.'include/functions_mail.inc.php');
333
334  $keyargs_content = array();
335  $keyargs_content[] = get_l10n_args('Author: %s', $comment['author']);
336  if ($action=='delete')
337  {
338    $keyargs_content[] = get_l10n_args('This author removed the comment with id %d',
339                                       $comment['comment_id']
340                                       );
341  }
342  else
343  {
344    $keyargs_content[] = get_l10n_args('This author modified following comment:', '');
345    $keyargs_content[] = get_l10n_args('Comment: %s', $comment['content']);
346  }
347
348  pwg_mail_notification_admins(get_l10n_args('Comment by %s',
349                                             $comment['author']),
350                               $keyargs_content
351                               );
352}
353
354function get_comment_author_id($comment_id, $die_on_error=true)
355{
356  $query = '
357SELECT
358    author_id
359  FROM '.COMMENTS_TABLE.'
360  WHERE id = '.$comment_id.'
361;';
362  $result = pwg_query($query);
363  if (pwg_db_num_rows($result) == 0)
364  {
365    if ($die_on_error)
366    {
367      fatal_error('Unknown comment identifier');
368    }
369    else
370    {
371      return false;
372    }
373  }
374 
375  list($author_id) = pwg_db_fetch_row($result);
376
377  return $author_id;
378}
379
380function validate_user_comment($comment_id)
381{
382  $query = '
383UPDATE '.COMMENTS_TABLE.'
384  SET validated = \'true\'
385    , validation_date = NOW()
386  WHERE id = '.$comment_id.'
387;';
388  pwg_query($query);
389}
390?>
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