[1849] | 1 | <?php |
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| 2 | // +-----------------------------------------------------------------------+ |
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| 3 | // | PhpWebGallery - a PHP based picture gallery | |
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| 4 | // | Copyright (C) 2002-2003 Pierrick LE GALL - pierrick@phpwebgallery.net | |
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| 5 | // | Copyright (C) 2003-2007 PhpWebGallery Team - http://phpwebgallery.net | |
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| 6 | // +-----------------------------------------------------------------------+ |
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| 7 | // | file : $Id: functions_comment.inc.php 2166 2007-11-20 22:30:58Z rub $ |
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| 8 | // | last update : $Date: 2007-11-20 22:30:58 +0000 (Tue, 20 Nov 2007) $ |
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| 9 | // | last modifier : $Author: rub $ |
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| 10 | // | revision : $Revision: 2166 $ |
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| 11 | // +-----------------------------------------------------------------------+ |
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| 12 | // | This program is free software; you can redistribute it and/or modify | |
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| 13 | // | it under the terms of the GNU General Public License as published by | |
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| 14 | // | the Free Software Foundation | |
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| 15 | // | | |
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| 16 | // | This program is distributed in the hope that it will be useful, but | |
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| 17 | // | WITHOUT ANY WARRANTY; without even the implied warranty of | |
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| 18 | // | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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| 19 | // | General Public License for more details. | |
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| 20 | // | | |
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| 21 | // | You should have received a copy of the GNU General Public License | |
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| 22 | // | along with this program; if not, write to the Free Software | |
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| 23 | // | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
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| 24 | // | USA. | |
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| 25 | // +-----------------------------------------------------------------------+ |
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| 26 | |
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| 27 | /** |
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| 28 | * returns a "secret key" that is to be sent back when a user enters a comment |
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| 29 | */ |
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| 30 | function get_comment_post_key($image_id) |
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| 31 | { |
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| 32 | global $conf; |
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[2155] | 33 | |
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[1849] | 34 | $time = time(); |
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[2027] | 35 | |
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| 36 | return sprintf( |
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| 37 | '%s:%s', |
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| 38 | $time, |
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| 39 | hash_hmac( |
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| 40 | 'md5', |
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| 41 | $time.':'.$image_id, |
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| 42 | $conf['secret_key'] |
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| 43 | ) |
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| 44 | ); |
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[1849] | 45 | } |
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| 46 | |
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| 47 | //returns string action to perform on a new comment: validate, moderate, reject |
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| 48 | function user_comment_check($action, $comment) |
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| 49 | { |
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| 50 | global $conf,$user; |
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| 51 | |
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| 52 | if ($action=='reject') |
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| 53 | return $action; |
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| 54 | |
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| 55 | $my_action = $conf['comment_spam_reject'] ? 'reject':'moderate'; |
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| 56 | |
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| 57 | if ($action==$my_action) |
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| 58 | return $action; |
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| 59 | |
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| 60 | // we do here only BASIC spam check (plugins can do more) |
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[2029] | 61 | if ( !is_a_guest() ) |
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[1849] | 62 | return $action; |
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| 63 | |
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| 64 | $link_count = preg_match_all( '/https?:\/\//', |
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| 65 | $comment['content'], $matches); |
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| 66 | |
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| 67 | if ( strpos($comment['author'], 'http://')!==false ) |
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| 68 | { |
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| 69 | $link_count++; |
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| 70 | } |
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[2155] | 71 | |
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[1849] | 72 | if ( $link_count>$conf['comment_spam_max_links'] ) |
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| 73 | return $my_action; |
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| 74 | |
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| 75 | return $action; |
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| 76 | } |
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| 77 | |
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| 78 | |
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| 79 | add_event_handler('user_comment_check', 'user_comment_check', |
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| 80 | EVENT_HANDLER_PRIORITY_NEUTRAL, 2); |
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| 81 | |
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| 82 | /** |
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| 83 | * Tries to insert a user comment in the database and returns one of : |
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| 84 | * validate, moderate, reject |
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| 85 | * @param array comm contains author, content, image_id |
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| 86 | * @param string key secret key sent back to the browser |
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| 87 | * @param array infos out array of messages |
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| 88 | */ |
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| 89 | function insert_user_comment( &$comm, $key, &$infos ) |
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| 90 | { |
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| 91 | global $conf, $user; |
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[2155] | 92 | |
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| 93 | $comm = array_merge( $comm, |
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[1849] | 94 | array( |
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| 95 | 'ip' => $_SERVER['REMOTE_ADDR'], |
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| 96 | 'agent' => $_SERVER['HTTP_USER_AGENT'] |
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| 97 | ) |
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| 98 | ); |
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| 99 | |
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| 100 | $infos = array(); |
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| 101 | if (!$conf['comments_validation'] or is_admin()) |
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| 102 | { |
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| 103 | $comment_action='validate'; //one of validate, moderate, reject |
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| 104 | } |
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| 105 | else |
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| 106 | { |
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| 107 | $comment_action='moderate'; //one of validate, moderate, reject |
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| 108 | } |
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| 109 | |
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[2029] | 110 | // display author field if the user status is guest or generic |
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| 111 | if (!is_classic_user()) |
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[1849] | 112 | { |
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| 113 | if ( empty($comm['author']) ) |
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| 114 | { |
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| 115 | $comm['author'] = 'guest'; |
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| 116 | } |
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| 117 | // if a guest try to use the name of an already existing user, he must be |
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| 118 | // rejected |
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| 119 | if ( $comm['author'] != 'guest' ) |
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| 120 | { |
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| 121 | $query = ' |
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| 122 | SELECT COUNT(*) AS user_exists |
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| 123 | FROM '.USERS_TABLE.' |
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| 124 | WHERE '.$conf['user_fields']['username']." = '".addslashes($comm['author'])."'"; |
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| 125 | $row = mysql_fetch_assoc( pwg_query( $query ) ); |
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| 126 | if ( $row['user_exists'] == 1 ) |
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| 127 | { |
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| 128 | array_push($infos, l10n('comment_user_exists') ); |
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| 129 | $comment_action='reject'; |
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| 130 | } |
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| 131 | } |
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| 132 | } |
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| 133 | else |
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| 134 | { |
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| 135 | $comm['author'] = $user['username']; |
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| 136 | } |
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| 137 | if ( empty($comm['content']) ) |
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| 138 | { // empty comment content |
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| 139 | $comment_action='reject'; |
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| 140 | } |
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| 141 | |
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| 142 | $key = explode( ':', @$key ); |
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| 143 | if ( count($key)!=2 |
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| 144 | or $key[0]>time()-2 // page must have been retrieved more than 2 sec ago |
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| 145 | or $key[0]<time()-3600 // 60 minutes expiration |
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| 146 | or hash_hmac( |
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| 147 | 'md5', $key[0].':'.$comm['image_id'], $conf['secret_key'] |
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| 148 | ) != $key[1] |
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| 149 | ) |
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| 150 | { |
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| 151 | $comment_action='reject'; |
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| 152 | } |
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[2155] | 153 | |
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[1849] | 154 | if ($comment_action!='reject' and $conf['anti-flood_time']>0 ) |
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| 155 | { // anti-flood system |
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| 156 | $reference_date = time() - $conf['anti-flood_time']; |
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| 157 | $query = ' |
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| 158 | SELECT id FROM '.COMMENTS_TABLE.' |
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| 159 | WHERE date > FROM_UNIXTIME('.$reference_date.') |
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| 160 | AND author = "'.addslashes($comm['author']).'"'; |
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| 161 | if ( mysql_num_rows( pwg_query( $query ) ) > 0 ) |
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| 162 | { |
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| 163 | array_push( $infos, l10n('comment_anti-flood') ); |
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| 164 | $comment_action='reject'; |
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| 165 | } |
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| 166 | } |
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| 167 | |
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| 168 | // perform more spam check |
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| 169 | $comment_action = trigger_event('user_comment_check', |
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| 170 | $comment_action, $comm |
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| 171 | ); |
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| 172 | |
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| 173 | if ( $comment_action!='reject' ) |
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| 174 | { |
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| 175 | $query = ' |
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| 176 | INSERT INTO '.COMMENTS_TABLE.' |
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| 177 | (author, content, date, validated, validation_date, image_id) |
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| 178 | VALUES ( |
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| 179 | "'.addslashes($comm['author']).'", |
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| 180 | "'.addslashes($comm['content']).'", |
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| 181 | NOW(), |
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| 182 | "'.($comment_action=='validate' ? 'true':'false').'", |
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| 183 | '.($comment_action=='validate' ? 'NOW()':'NULL').', |
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[2155] | 184 | '.$comm['image_id'].' |
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[1849] | 185 | ) |
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| 186 | '; |
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| 187 | |
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| 188 | pwg_query($query); |
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| 189 | |
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| 190 | $comm['id'] = mysql_insert_id(); |
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| 191 | |
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[2166] | 192 | if |
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| 193 | ( |
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| 194 | ($comment_action=='validate' and $conf['email_admin_on_comment']) |
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| 195 | or |
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| 196 | ($comment_action!='validate' and $conf['email_admin_on_comment_validation']) |
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| 197 | ) |
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[1849] | 198 | { |
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| 199 | include_once(PHPWG_ROOT_PATH.'include/functions_mail.inc.php'); |
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| 200 | |
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[1901] | 201 | $del_url = |
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| 202 | get_absolute_root_url().'comments.php?delete='.$comm['id']; |
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[1849] | 203 | |
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[1908] | 204 | $keyargs_content = array |
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| 205 | ( |
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| 206 | get_l10n_args('Author: %s', $comm['author']), |
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| 207 | get_l10n_args('Comment: %s', $comm['content']), |
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| 208 | get_l10n_args('', ''), |
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| 209 | get_l10n_args('Delete: %s', $del_url) |
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| 210 | ); |
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[1849] | 211 | |
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| 212 | if ($comment_action!='validate') |
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| 213 | { |
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[1908] | 214 | $keyargs_content[] = |
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| 215 | get_l10n_args('', ''); |
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| 216 | $keyargs_content[] = |
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| 217 | get_l10n_args('Validate: %s', |
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| 218 | get_absolute_root_url().'comments.php?validate='.$comm['id']); |
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[1849] | 219 | } |
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| 220 | |
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[1908] | 221 | pwg_mail_notification_admins |
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[1849] | 222 | ( |
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[1908] | 223 | get_l10n_args('Comment by %s', $comm['author']), |
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| 224 | $keyargs_content |
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[1849] | 225 | ); |
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| 226 | } |
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| 227 | } |
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| 228 | return $comment_action; |
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| 229 | } |
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| 230 | |
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| 231 | ?> |
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