1 | <?php |
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2 | // +-----------------------------------------------------------------------+ |
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3 | // | Piwigo - a PHP based picture gallery | |
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4 | // +-----------------------------------------------------------------------+ |
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5 | // | Copyright(C) 2008-2010 Piwigo Team http://piwigo.org | |
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6 | // | Copyright(C) 2003-2008 PhpWebGallery Team http://phpwebgallery.net | |
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7 | // | Copyright(C) 2002-2003 Pierrick LE GALL http://le-gall.net/pierrick | |
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8 | // +-----------------------------------------------------------------------+ |
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9 | // | This program is free software; you can redistribute it and/or modify | |
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10 | // | it under the terms of the GNU General Public License as published by | |
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11 | // | the Free Software Foundation | |
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12 | // | | |
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13 | // | This program is distributed in the hope that it will be useful, but | |
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14 | // | WITHOUT ANY WARRANTY; without even the implied warranty of | |
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15 | // | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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16 | // | General Public License for more details. | |
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17 | // | | |
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18 | // | You should have received a copy of the GNU General Public License | |
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19 | // | along with this program; if not, write to the Free Software | |
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20 | // | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
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21 | // | USA. | |
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22 | // +-----------------------------------------------------------------------+ |
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23 | |
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24 | //returns string action to perform on a new comment: validate, moderate, reject |
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25 | function user_comment_check($action, $comment) |
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26 | { |
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27 | global $conf,$user; |
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28 | |
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29 | if ($action=='reject') |
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30 | return $action; |
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31 | |
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32 | $my_action = $conf['comment_spam_reject'] ? 'reject':'moderate'; |
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33 | |
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34 | if ($action==$my_action) |
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35 | return $action; |
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36 | |
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37 | // we do here only BASIC spam check (plugins can do more) |
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38 | if ( !is_a_guest() ) |
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39 | return $action; |
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40 | |
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41 | $link_count = preg_match_all( '/https?:\/\//', |
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42 | $comment['content'], $matches); |
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43 | |
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44 | if ( strpos($comment['author'], 'http://')!==false ) |
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45 | { |
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46 | $link_count++; |
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47 | } |
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48 | |
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49 | if ( $link_count>$conf['comment_spam_max_links'] ) |
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50 | return $my_action; |
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51 | |
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52 | return $action; |
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53 | } |
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54 | |
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55 | |
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56 | add_event_handler('user_comment_check', 'user_comment_check', |
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57 | EVENT_HANDLER_PRIORITY_NEUTRAL, 2); |
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58 | |
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59 | /** |
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60 | * Tries to insert a user comment in the database and returns one of : |
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61 | * validate, moderate, reject |
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62 | * @param array comm contains author, content, image_id |
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63 | * @param string key secret key sent back to the browser |
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64 | * @param array infos out array of messages |
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65 | */ |
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66 | function insert_user_comment( &$comm, $key, &$infos ) |
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67 | { |
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68 | global $conf, $user; |
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69 | |
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70 | $comm = array_merge( $comm, |
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71 | array( |
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72 | 'ip' => $_SERVER['REMOTE_ADDR'], |
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73 | 'agent' => $_SERVER['HTTP_USER_AGENT'] |
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74 | ) |
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75 | ); |
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76 | |
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77 | $infos = array(); |
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78 | if (!$conf['comments_validation'] or is_admin()) |
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79 | { |
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80 | $comment_action='validate'; //one of validate, moderate, reject |
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81 | } |
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82 | else |
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83 | { |
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84 | $comment_action='moderate'; //one of validate, moderate, reject |
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85 | } |
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86 | |
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87 | // display author field if the user status is guest or generic |
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88 | if (!is_classic_user()) |
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89 | { |
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90 | if ( empty($comm['author']) ) |
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91 | { |
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92 | $comm['author'] = 'guest'; |
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93 | } |
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94 | $comm['author_id'] = $conf['guest_id']; |
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95 | // if a guest try to use the name of an already existing user, he must be |
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96 | // rejected |
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97 | if ( $comm['author'] != 'guest' ) |
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98 | { |
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99 | $query = ' |
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100 | SELECT COUNT(*) AS user_exists |
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101 | FROM '.USERS_TABLE.' |
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102 | WHERE '.$conf['user_fields']['username']." = '".addslashes($comm['author'])."'"; |
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103 | $row = pwg_db_fetch_assoc( pwg_query( $query ) ); |
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104 | if ( $row['user_exists'] == 1 ) |
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105 | { |
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106 | array_push($infos, l10n('This login is already used by another user') ); |
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107 | $comment_action='reject'; |
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108 | } |
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109 | } |
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110 | } |
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111 | else |
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112 | { |
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113 | $comm['author'] = addslashes($user['username']); |
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114 | $comm['author_id'] = $user['id']; |
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115 | } |
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116 | |
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117 | if ( empty($comm['content']) ) |
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118 | { // empty comment content |
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119 | $comment_action='reject'; |
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120 | } |
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121 | |
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122 | $key = explode( ':', @$key ); |
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123 | if ( count($key)!=2 |
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124 | or $key[0]>time()-2 // page must have been retrieved more than 2 sec ago |
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125 | or $key[0]<time()-3600 // 60 minutes expiration |
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126 | or hash_hmac( |
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127 | 'md5', $key[0].':'.$comm['image_id'], $conf['secret_key'] |
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128 | ) != $key[1] |
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129 | ) |
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130 | { |
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131 | $comment_action='reject'; |
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132 | } |
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133 | |
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134 | if ($comment_action!='reject' and $conf['anti-flood_time']>0 ) |
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135 | { // anti-flood system |
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136 | $reference_date = time() - $conf['anti-flood_time']; |
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137 | $query = ' |
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138 | SELECT id FROM '.COMMENTS_TABLE.' |
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139 | WHERE date > FROM_UNIXTIME('.$reference_date.') |
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140 | AND author_id = '.$comm['author_id']; |
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141 | if ( pwg_db_num_rows( pwg_query( $query ) ) > 0 ) |
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142 | { |
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143 | array_push( $infos, l10n('Anti-flood system : please wait for a moment before trying to post another comment') ); |
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144 | $comment_action='reject'; |
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145 | } |
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146 | } |
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147 | |
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148 | // perform more spam check |
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149 | $comment_action = trigger_event('user_comment_check', |
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150 | $comment_action, $comm |
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151 | ); |
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152 | |
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153 | if ( $comment_action!='reject' ) |
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154 | { |
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155 | $query = ' |
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156 | INSERT INTO '.COMMENTS_TABLE.' |
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157 | (author, author_id, content, date, validated, validation_date, image_id) |
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158 | VALUES ( |
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159 | "'.$comm['author'].'", |
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160 | '.$comm['author_id'].', |
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161 | "'.$comm['content'].'", |
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162 | NOW(), |
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163 | "'.($comment_action=='validate' ? 'true':'false').'", |
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164 | '.($comment_action=='validate' ? 'NOW()':'NULL').', |
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165 | '.$comm['image_id'].' |
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166 | ) |
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167 | '; |
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168 | |
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169 | pwg_query($query); |
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170 | |
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171 | $comm['id'] = pwg_db_insert_id(COMMENTS_TABLE); |
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172 | |
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173 | if ($conf['email_admin_on_comment'] |
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174 | or ($conf['email_admin_on_comment_validation'] and 'moderate' == $comment_action)) |
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175 | { |
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176 | include_once(PHPWG_ROOT_PATH.'include/functions_mail.inc.php'); |
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177 | |
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178 | $comment_url = get_absolute_root_url().'comments.php?comment_id='.$comm['id']; |
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179 | |
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180 | $keyargs_content = array |
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181 | ( |
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182 | get_l10n_args('Author: %s', stripslashes($comm['author']) ), |
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183 | get_l10n_args('Comment: %s', stripslashes($comm['content']) ), |
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184 | get_l10n_args('', ''), |
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185 | get_l10n_args('Manage this user comment: %s', $comment_url) |
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186 | ); |
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187 | |
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188 | if ('moderate' == $comment_action) |
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189 | { |
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190 | $keyargs_content[] = get_l10n_args('', ''); |
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191 | $keyargs_content[] = get_l10n_args('(!) This comment requires validation', ''); |
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192 | } |
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193 | |
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194 | pwg_mail_notification_admins |
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195 | ( |
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196 | get_l10n_args('Comment by %s', stripslashes($comm['author']) ), |
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197 | $keyargs_content |
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198 | ); |
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199 | } |
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200 | } |
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201 | return $comment_action; |
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202 | } |
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203 | |
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204 | /** |
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205 | * Tries to delete a user comment in the database |
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206 | * only admin can delete all comments |
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207 | * other users can delete their own comments |
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208 | * so to avoid a new sql request we add author in where clause |
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209 | * |
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210 | * @param comment_id |
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211 | */ |
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212 | function delete_user_comment($comment_id) { |
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213 | $user_where_clause = ''; |
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214 | if (!is_admin()) |
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215 | { |
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216 | $user_where_clause = ' AND author_id = \''.$GLOBALS['user']['id'].'\''; |
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217 | } |
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218 | $query = ' |
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219 | DELETE FROM '.COMMENTS_TABLE.' |
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220 | WHERE id = '.$comment_id. |
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221 | $user_where_clause.' |
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222 | ;'; |
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223 | $result = pwg_query($query); |
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224 | if ($result) { |
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225 | email_admin('delete', array('author' => $GLOBALS['user']['username'])); |
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226 | } |
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227 | } |
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228 | |
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229 | /** |
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230 | * Tries to update a user comment in the database |
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231 | * only admin can update all comments |
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232 | * users can edit their own comments if admin allow them |
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233 | * so to avoid a new sql request we add author in where clause |
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234 | * |
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235 | * @param comment_id |
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236 | * @param post_key |
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237 | * @param content |
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238 | */ |
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239 | |
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240 | function update_user_comment($comment, $post_key) |
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241 | { |
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242 | global $conf; |
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243 | |
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244 | $comment_action = 'validate'; |
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245 | |
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246 | $key = explode( ':', $post_key ); |
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247 | if ( count($key)!=2 |
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248 | or $key[0]>time()-2 // page must have been retrieved more than 2 sec ago |
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249 | or $key[0]<time()-3600 // 60 minutes expiration |
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250 | or hash_hmac('md5', $key[0].':'.$comment['image_id'], $conf['secret_key'] |
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251 | ) != $key[1] |
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252 | ) |
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253 | { |
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254 | $comment_action='reject'; |
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255 | } |
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256 | |
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257 | /* ? this is a MySql Error - author_id is not defined |
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258 | if ($comment_action!='reject' and $conf['anti-flood_time']>0 ) |
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259 | { // anti-flood system |
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260 | $reference_date = time() - $conf['anti-flood_time']; |
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261 | $query = ' |
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262 | SELECT id FROM '.COMMENTS_TABLE.' |
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263 | WHERE date > FROM_UNIXTIME('.$reference_date.') |
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264 | AND author_id = '.$comm['author_id']; |
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265 | if ( pwg_db_num_rows( pwg_query( $query ) ) > 0 ) |
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266 | { |
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267 | //?? array_push( $infos, l10n('Anti-flood system : please wait for a moment before trying to post another comment') ); |
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268 | $comment_action='reject'; |
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269 | } |
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270 | } |
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271 | */ |
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272 | // perform more spam check |
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273 | $comment_action = |
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274 | trigger_event('user_comment_check', |
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275 | $comment_action, |
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276 | array_merge($comment, |
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277 | array('author' => $GLOBALS['user']['username']) |
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278 | ) |
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279 | ); |
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280 | |
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281 | if ( $comment_action!='reject' ) |
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282 | { |
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283 | $user_where_clause = ''; |
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284 | if (!is_admin()) |
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285 | { |
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286 | $user_where_clause = ' AND author_id = \''. |
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287 | $GLOBALS['user']['id'].'\''; |
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288 | } |
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289 | $query = ' |
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290 | UPDATE '.COMMENTS_TABLE.' |
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291 | SET content = \''.$comment['content'].'\', |
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292 | validation_date = now() |
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293 | WHERE id = '.$comment['comment_id']. |
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294 | $user_where_clause.' |
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295 | ;'; |
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296 | $result = pwg_query($query); |
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297 | if ($result) { |
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298 | email_admin('edit', array('author' => $GLOBALS['user']['username'], |
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299 | 'content' => stripslashes($comment['content'])) ); |
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300 | } |
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301 | } |
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302 | } |
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303 | |
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304 | function email_admin($action, $comment) |
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305 | { |
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306 | global $conf; |
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307 | |
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308 | if (!in_array($action, array('edit', 'delete')) |
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309 | or (($action=='edit') and !$conf['email_admin_on_comment_edition']) |
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310 | or (($action=='delete') and !$conf['email_admin_on_comment_deletion'])) |
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311 | { |
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312 | return; |
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313 | } |
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314 | |
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315 | include_once(PHPWG_ROOT_PATH.'include/functions_mail.inc.php'); |
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316 | |
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317 | $keyargs_content = array(); |
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318 | $keyargs_content[] = get_l10n_args('Author: %s', $comment['author']); |
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319 | if ($action=='delete') |
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320 | { |
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321 | $keyargs_content[] = get_l10n_args('This author removed the comment with id %d', |
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322 | $comment['comment_id'] |
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323 | ); |
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324 | } |
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325 | else |
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326 | { |
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327 | $keyargs_content[] = get_l10n_args('This author modified following comment:', ''); |
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328 | $keyargs_content[] = get_l10n_args('Comment: %s', $comment['content']); |
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329 | } |
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330 | |
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331 | pwg_mail_notification_admins(get_l10n_args('Comment by %s', |
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332 | $comment['author']), |
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333 | $keyargs_content |
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334 | ); |
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335 | } |
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336 | |
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337 | function get_comment_author_id($comment_id, $die_on_error=true) |
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338 | { |
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339 | $query = ' |
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340 | SELECT |
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341 | author_id |
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342 | FROM '.COMMENTS_TABLE.' |
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343 | WHERE id = '.$comment_id.' |
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344 | ;'; |
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345 | $result = pwg_query($query); |
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346 | if (pwg_db_num_rows($result) == 0) |
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347 | { |
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348 | if ($die_on_error) |
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349 | { |
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350 | fatal_error('Unknown comment identifier'); |
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351 | } |
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352 | else |
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353 | { |
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354 | return false; |
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355 | } |
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356 | } |
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357 | |
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358 | list($author_id) = pwg_db_fetch_row($result); |
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359 | |
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360 | return $author_id; |
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361 | } |
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362 | |
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363 | function validate_user_comment($comment_id) |
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364 | { |
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365 | $query = ' |
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366 | UPDATE '.COMMENTS_TABLE.' |
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367 | SET validated = "true" |
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368 | , validation_date = NOW() |
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369 | WHERE id = '.$comment_id.' |
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370 | ;'; |
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371 | pwg_query($query); |
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372 | } |
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373 | ?> |
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