wp-content/plugins/akismet/class.akismet.php

   1 <?php
   2
   3 class Akismet {
   4         const API_HOST = 'rest.akismet.com';
   5         const API_PORT = 80;
   6         const MAX_DELAY_BEFORE_MODERATION_EMAIL = 86400; // One day in seconds
   7
   8         private static $last_comment = '';
   9         private static $initiated = false;
  10         private static $prevent_moderation_email_for_these_comments = array();
  11         private static $last_comment_result = null;
  12
  13         public static function init() {
  14                 if ( ! self::$initiated ) {
  15                         self::init_hooks();
  16                 }
  17         }
  18
  19         /**
  20          * Initializes WordPress hooks
  21          */
  22         private static function init_hooks() {
  23                 self::$initiated = true;
  24
  25                 add_action( 'wp_insert_comment', array( 'Akismet', 'auto_check_update_meta' ), 10, 2 );
  26                 add_action( 'preprocess_comment', array( 'Akismet', 'auto_check_comment' ), 1 );
  27                 add_action( 'akismet_scheduled_delete', array( 'Akismet', 'delete_old_comments' ) );
  28                 add_action( 'akismet_scheduled_delete', array( 'Akismet', 'delete_old_comments_meta' ) );
  29                 add_action( 'akismet_schedule_cron_recheck', array( 'Akismet', 'cron_recheck' ) );
  30
  31                 $akismet_comment_nonce_option = apply_filters( 'akismet_comment_nonce', get_option( 'akismet_comment_nonce' ) );
  32
  33                 if ( $akismet_comment_nonce_option == 'true' || $akismet_comment_nonce_option == '' )
  34                         add_action( 'comment_form',  array( 'Akismet',  'add_comment_nonce' ), 1 );
  35
  36                 add_action( 'admin_head-edit-comments.php', array( 'Akismet', 'load_form_js' ) );
  37                 add_action( 'comment_form', array( 'Akismet', 'load_form_js' ) );
  38                 add_action( 'comment_form', array( 'Akismet', 'inject_ak_js' ) );
  39
  40                 add_filter( 'comment_moderation_recipients', array( 'Akismet', 'disable_moderation_emails_if_unreachable' ), 1000, 2 );
  41                 add_filter( 'pre_comment_approved', array( 'Akismet', 'last_comment_status' ), 10, 2 );
  42
  43                 add_action( 'transition_comment_status', array( 'Akismet', 'transition_comment_status' ), 10, 3 );
  44
  45                 if ( '3.0.5' == $GLOBALS['wp_version'] ) {
  46                         remove_filter( 'comment_text', 'wp_kses_data' );
  47                         if ( is_admin() )
  48                                 add_filter( 'comment_text', 'wp_kses_post' );
  49                 }
  50         }
  51
  52         public static function get_api_key() {
  53                 return apply_filters( 'akismet_get_api_key', defined('WPCOM_API_KEY') ? constant('WPCOM_API_KEY') : get_option('wordpress_api_key') );
  54         }
  55
  56         public static function check_key_status( $key, $ip = null ) {
  57                 return self::http_post( Akismet::build_query( array( 'key' => $key, 'blog' => get_option('home') ) ), 'verify-key', $ip );
  58         }
  59
  60         public static function verify_key( $key, $ip = null ) {
  61                 $response = self::check_key_status( $key, $ip );
  62
  63                 if ( $response[1] != 'valid' && $response[1] != 'invalid' )
  64                         return 'failed';
  65
  66                 self::update_alert( $response );
  67
  68                 return $response[1];
  69         }
  70
  71         public static function auto_check_comment( $commentdata ) {
  72                 self::$last_comment_result = null;
  73
  74                 $comment = $commentdata;
  75
  76                 $comment['user_ip']      = self::get_ip_address();
  77                 $comment['user_agent']   = self::get_user_agent();
  78                 $comment['referrer']     = self::get_referer();
  79                 $comment['blog']         = get_option('home');
  80                 $comment['blog_lang']    = get_locale();
  81                 $comment['blog_charset'] = get_option('blog_charset');
  82                 $comment['permalink']    = get_permalink( $comment['comment_post_ID'] );
  83
  84                 if ( !empty( $comment['user_ID'] ) )
  85                         $comment['user_role'] = Akismet::get_user_roles( $comment['user_ID'] );
  86
  87                 $akismet_nonce_option = apply_filters( 'akismet_comment_nonce', get_option( 'akismet_comment_nonce' ) );
  88                 $comment['akismet_comment_nonce'] = 'inactive';
  89                 if ( $akismet_nonce_option == 'true' || $akismet_nonce_option == '' ) {
  90                         $comment['akismet_comment_nonce'] = 'failed';
  91                         if ( isset( $_POST['akismet_comment_nonce'] ) && wp_verify_nonce( $_POST['akismet_comment_nonce'], 'akismet_comment_nonce_' . $comment['comment_post_ID'] ) )
  92                                 $comment['akismet_comment_nonce'] = 'passed';
  93
  94                         // comment reply in wp-admin
  95                         if ( isset( $_POST['_ajax_nonce-replyto-comment'] ) && check_ajax_referer( 'replyto-comment', '_ajax_nonce-replyto-comment' ) )
  96                                 $comment['akismet_comment_nonce'] = 'passed';
  97
  98                 }
  99
 100                 if ( self::is_test_mode() )
 101                         $comment['is_test'] = 'true';
 102
 103                 foreach( $_POST as $key => $value ) {
 104                         if ( is_string( $value ) )
 105                                 $comment["POST_{$key}"] = $value;
 106                 }
 107
 108                 $ignore = array( 'HTTP_COOKIE', 'HTTP_COOKIE2', 'PHP_AUTH_PW' );
 109
 110                 foreach ( $_SERVER as $key => $value ) {
 111                         if ( !in_array( $key, $ignore ) && is_string($value) )
 112                                 $comment["$key"] = $value;
 113                         else
 114                                 $comment["$key"] = '';
 115                 }
 116
 117                 $post = get_post( $comment['comment_post_ID'] );
 118                 $comment[ 'comment_post_modified_gmt' ] = $post->post_modified_gmt;
 119
 120                 $response = self::http_post( Akismet::build_query( $comment ), 'comment-check' );
 121
 122                 do_action( 'akismet_comment_check_response', $response );
 123
 124                 self::update_alert( $response );
 125
 126                 $commentdata['comment_as_submitted'] = array_intersect_key( $comment, array( 'blog' => '', 'blog_charset' => '', 'blog_lang' => '', 'blog_ua' => '', 'comment_agent' => '', 'comment_author' => '', 'comment_author_IP' => '', 'comment_author_email' => '', 'comment_author_url' => '', 'comment_content' => '', 'comment_date_gmt' => '', 'comment_tags' => '', 'comment_type' => '', 'guid' => '', 'is_test' => '', 'permalink' => '', 'reporter' => '', 'site_domain' => '', 'submit_referer' => '', 'submit_uri' => '', 'user_ID' => '', 'user_agent' => '', 'user_id' => '', 'user_ip' => '' ) );
 127                 $commentdata['akismet_result']       = $response[1];
 128
 129                 if ( isset( $response[0]['x-akismet-pro-tip'] ) )
 130                 $commentdata['akismet_pro_tip'] = $response[0]['x-akismet-pro-tip'];
 131
 132                 if ( isset( $response[0]['x-akismet-error'] ) ) {
 133                         // An error occurred that we anticipated (like a suspended key) and want the user to act on.
 134                         // Send to moderation.
 135                         self::$last_comment_result = '0';
 136                 }
 137                 else if ( 'true' == $response[1] ) {
 138                         // akismet_spam_count will be incremented later by comment_is_spam()
 139                         self::$last_comment_result = 'spam';
 140
 141                         $discard = ( isset( $commentdata['akismet_pro_tip'] ) && $commentdata['akismet_pro_tip'] === 'discard' && self::allow_discard() );
 142
 143                         do_action( 'akismet_spam_caught', $discard );
 144
 145                         if ( $discard ) {
 146                                 // akismet_result_spam() won't be called so bump the counter here
 147                                 if ( $incr = apply_filters('akismet_spam_count_incr', 1) )
 148                                         update_option( 'akismet_spam_count', get_option('akismet_spam_count') + $incr );
 149                                 $redirect_to = isset( $_SERVER['HTTP_REFERER'] ) ? $_SERVER['HTTP_REFERER'] : get_permalink( $post );
 150                                 wp_safe_redirect( esc_url_raw( $redirect_to ) );
 151                                 die();
 152                         }
 153                 }
 154
 155                 // if the response is neither true nor false, hold the comment for moderation and schedule a recheck
 156                 if ( 'true' != $response[1] && 'false' != $response[1] ) {
 157                         if ( !current_user_can('moderate_comments') ) {
 158                                 // Comment status should be moderated
 159                                 self::$last_comment_result = '0';
 160                         }
 161                         if ( function_exists('wp_next_scheduled') && function_exists('wp_schedule_single_event') ) {
 162                                 if ( !wp_next_scheduled( 'akismet_schedule_cron_recheck' ) ) {
 163                                         wp_schedule_single_event( time() + 1200, 'akismet_schedule_cron_recheck' );
 164                                 }
 165                         }
 166
 167                         self::$prevent_moderation_email_for_these_comments[] = $commentdata;
 168                 }
 169
 170                 if ( function_exists('wp_next_scheduled') && function_exists('wp_schedule_event') ) {
 171                         // WP 2.1+: delete old comments daily
 172                         if ( !wp_next_scheduled( 'akismet_scheduled_delete' ) )
 173                                 wp_schedule_event( time(), 'daily', 'akismet_scheduled_delete' );
 174                 }
 175                 elseif ( (mt_rand(1, 10) == 3) ) {
 176                         // WP 2.0: run this one time in ten
 177                         self::delete_old_comments();
 178                 }
 179
 180                 self::set_last_comment( $commentdata );
 181                 self::fix_scheduled_recheck();
 182
 183                 return self::$last_comment;
 184         }
 185
 186         public static function get_last_comment() {
 187                 return self::$last_comment;
 188         }
 189
 190         public static function set_last_comment( $comment ) {
 191                 if ( is_null( $comment ) ) {
 192                         self::$last_comment = null;
 193                 }
 194                 else {
 195                         // We filter it here so that it matches the filtered comment data that we'll have to compare against later.
 196                         // wp_filter_comment expects comment_author_IP
 197                         self::$last_comment = wp_filter_comment(
 198                                 array_merge(
 199                                         array( 'comment_author_IP' => self::get_ip_address() ),
 200                                         $comment
 201                                 )
 202                         );
 203                 }
 204         }
 205
 206         // this fires on wp_insert_comment.  we can't update comment_meta when auto_check_comment() runs
 207         // because we don't know the comment ID at that point.
 208         public static function auto_check_update_meta( $id, $comment ) {
 209
 210                 // failsafe for old WP versions
 211                 if ( !function_exists('add_comment_meta') )
 212                         return false;
 213
 214                 if ( !isset( self::$last_comment['comment_author_email'] ) )
 215                         self::$last_comment['comment_author_email'] = '';
 216
 217                 // wp_insert_comment() might be called in other contexts, so make sure this is the same comment
 218                 // as was checked by auto_check_comment
 219                 if ( is_object( $comment ) && !empty( self::$last_comment ) && is_array( self::$last_comment ) ) {
 220                         if ( self::matches_last_comment( $comment ) ) {
 221
 222                                         load_plugin_textdomain( 'akismet' );
 223
 224                                         // normal result: true or false
 225                                         if ( self::$last_comment['akismet_result'] == 'true' ) {
 226                                                 update_comment_meta( $comment->comment_ID, 'akismet_result', 'true' );
 227                                                 self::update_comment_history( $comment->comment_ID, __('Akismet caught this comment as spam', 'akismet'), 'check-spam' );
 228                                                 if ( $comment->comment_approved != 'spam' )
 229                                                         self::update_comment_history( $comment->comment_ID, sprintf( __('Comment status was changed to %s', 'akismet'), $comment->comment_approved), 'status-changed'.$comment->comment_approved );
 230                                         }
 231                                         elseif ( self::$last_comment['akismet_result'] == 'false' ) {
 232                                                 update_comment_meta( $comment->comment_ID, 'akismet_result', 'false' );
 233                                                 self::update_comment_history( $comment->comment_ID, __('Akismet cleared this comment', 'akismet'), 'check-ham' );
 234                                                 if ( $comment->comment_approved == 'spam' ) {
 235                                                         if ( wp_blacklist_check($comment->comment_author, $comment->comment_author_email, $comment->comment_author_url, $comment->comment_content, $comment->comment_author_IP, $comment->comment_agent) )
 236                                                                 self::update_comment_history( $comment->comment_ID, __('Comment was caught by wp_blacklist_check', 'akismet'), 'wp-blacklisted' );
 237                                                         else
 238                                                                 self::update_comment_history( $comment->comment_ID, sprintf( __('Comment status was changed to %s', 'akismet'), $comment->comment_approved), 'status-changed-'.$comment->comment_approved );
 239                                                 }
 240                                         } // abnormal result: error
 241                                         else {
 242                                                 update_comment_meta( $comment->comment_ID, 'akismet_error', time() );
 243                                                 self::update_comment_history( $comment->comment_ID, sprintf( __('Akismet was unable to check this comment (response: %s), will automatically retry again later.', 'akismet'), substr(self::$last_comment['akismet_result'], 0, 50)), 'check-error' );
 244                                         }
 245
 246                                         // record the complete original data as submitted for checking
 247                                         if ( isset( self::$last_comment['comment_as_submitted'] ) )
 248                                                 update_comment_meta( $comment->comment_ID, 'akismet_as_submitted', self::$last_comment['comment_as_submitted'] );
 249
 250                                         if ( isset( self::$last_comment['akismet_pro_tip'] ) )
 251                                                 update_comment_meta( $comment->comment_ID, 'akismet_pro_tip', self::$last_comment['akismet_pro_tip'] );
 252                         }
 253                 }
 254         }
 255
 256         public static function delete_old_comments() {
 257                 global $wpdb;
 258
 259                 /**
 260                  * Determines how many comments will be deleted in each batch.
 261                  *
 262                  * @param int The default, as defined by AKISMET_DELETE_LIMIT.
 263                  */
 264                 $delete_limit = apply_filters( 'akismet_delete_comment_limit', defined( 'AKISMET_DELETE_LIMIT' ) ? AKISMET_DELETE_LIMIT : 10000 );
 265                 $delete_limit = max( 1, intval( $delete_limit ) );
 266
 267                 /**
 268                  * Determines how many days a comment will be left in the Spam queue before being deleted.
 269                  *
 270                  * @param int The default number of days.
 271                  */
 272                 $delete_interval = apply_filters( 'akismet_delete_comment_interval', 15 );
 273                 $delete_interval = max( 1, intval( $delete_interval ) );
 274
 275                 while ( $comment_ids = $wpdb->get_col( $wpdb->prepare( "SELECT comment_id FROM {$wpdb->comments} WHERE DATE_SUB(NOW(), INTERVAL %d DAY) > comment_date_gmt AND comment_approved = 'spam' LIMIT %d", $delete_interval, $delete_limit ) ) ) {
 276                         if ( empty( $comment_ids ) )
 277                                 return;
 278
 279                         $wpdb->queries = array();
 280
 281                         foreach ( $comment_ids as $comment_id ) {
 282                                 do_action( 'delete_comment', $comment_id );
 283                         }
 284
 285                         $comma_comment_ids = implode( ', ', array_map('intval', $comment_ids) );
 286
 287                         $wpdb->query("DELETE FROM {$wpdb->comments} WHERE comment_id IN ( $comma_comment_ids )");
 288                         $wpdb->query("DELETE FROM {$wpdb->commentmeta} WHERE comment_id IN ( $comma_comment_ids )");
 289
 290                         clean_comment_cache( $comment_ids );
 291                 }
 292
 293                 if ( apply_filters( 'akismet_optimize_table', ( mt_rand(1, 5000) == 11), $wpdb->comments ) ) // lucky number
 294                         $wpdb->query("OPTIMIZE TABLE {$wpdb->comments}");
 295         }
 296
 297         public static function delete_old_comments_meta() {
 298                 global $wpdb;
 299
 300                 $interval = apply_filters( 'akismet_delete_commentmeta_interval', 15 );
 301
 302                 # enfore a minimum of 1 day
 303                 $interval = absint( $interval );
 304                 if ( $interval < 1 )
 305                         $interval = 1;
 306
 307                 // akismet_as_submitted meta values are large, so expire them
 308                 // after $interval days regardless of the comment status
 309                 while ( $comment_ids = $wpdb->get_col( $wpdb->prepare( "SELECT m.comment_id FROM {$wpdb->commentmeta} as m INNER JOIN {$wpdb->comments} as c USING(comment_id) WHERE m.meta_key = 'akismet_as_submitted' AND DATE_SUB(NOW(), INTERVAL %d DAY) > c.comment_date_gmt LIMIT 10000", $interval ) ) ) {
 310                         if ( empty( $comment_ids ) )
 311                                 return;
 312
 313                         $wpdb->queries = array();
 314
 315                         foreach ( $comment_ids as $comment_id ) {
 316                                 delete_comment_meta( $comment_id, 'akismet_as_submitted' );
 317                         }
 318                 }
 319
 320                 if ( apply_filters( 'akismet_optimize_table', ( mt_rand(1, 5000) == 11), $wpdb->commentmeta ) ) // lucky number
 321                         $wpdb->query("OPTIMIZE TABLE {$wpdb->commentmeta}");
 322         }
 323
 324         // how many approved comments does this author have?
 325         public static function get_user_comments_approved( $user_id, $comment_author_email, $comment_author, $comment_author_url ) {
 326                 global $wpdb;
 327
 328                 if ( !empty( $user_id ) )
 329                         return (int) $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM {$wpdb->comments} WHERE user_id = %d AND comment_approved = 1", $user_id ) );
 330
 331                 if ( !empty( $comment_author_email ) )
 332                         return (int) $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM {$wpdb->comments} WHERE comment_author_email = %s AND comment_author = %s AND comment_author_url = %s AND comment_approved = 1", $comment_author_email, $comment_author, $comment_author_url ) );
 333
 334                 return 0;
 335         }
 336
 337         // get the full comment history for a given comment, as an array in reverse chronological order
 338         public static function get_comment_history( $comment_id ) {
 339
 340                 // failsafe for old WP versions
 341                 if ( !function_exists('add_comment_meta') )
 342                         return false;
 343
 344                 $history = get_comment_meta( $comment_id, 'akismet_history', false );
 345                 usort( $history, array( 'Akismet', '_cmp_time' ) );
 346                 return $history;
 347         }
 348
 349         // log an event for a given comment, storing it in comment_meta
 350         public static function update_comment_history( $comment_id, $message, $event=null ) {
 351                 global $current_user;
 352
 353                 // failsafe for old WP versions
 354                 if ( !function_exists('add_comment_meta') )
 355                         return false;
 356
 357                 $user = '';
 358                 if ( is_object( $current_user ) && isset( $current_user->user_login ) )
 359                         $user = $current_user->user_login;
 360
 361                 $event = array(
 362                         'time'    => self::_get_microtime(),
 363                         'message' => $message,
 364                         'event'   => $event,
 365                         'user'    => $user,
 366                 );
 367
 368                 // $unique = false so as to allow multiple values per comment
 369                 $r = add_comment_meta( $comment_id, 'akismet_history', $event, false );
 370         }
 371
 372         public static function check_db_comment( $id, $recheck_reason = 'recheck_queue' ) {
 373                 global $wpdb;
 374
 375                 $c = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->comments} WHERE comment_ID = %d", $id ), ARRAY_A );
 376                 if ( !$c )
 377                         return;
 378
 379                 $c['user_ip']        = $c['comment_author_IP'];
 380                 $c['user_agent']     = $c['comment_agent'];
 381                 $c['referrer']       = '';
 382                 $c['blog']           = get_option('home');
 383                 $c['blog_lang']      = get_locale();
 384                 $c['blog_charset']   = get_option('blog_charset');
 385                 $c['permalink']      = get_permalink($c['comment_post_ID']);
 386                 $c['recheck_reason'] = $recheck_reason;
 387
 388                 if ( self::is_test_mode() )
 389                         $c['is_test'] = 'true';
 390
 391                 $response = self::http_post( Akismet::build_query( $c ), 'comment-check' );
 392
 393                 return ( is_array( $response ) && ! empty( $response[1] ) ) ? $response[1] : false;
 394         }
 395
 396
 397
 398         public static function transition_comment_status( $new_status, $old_status, $comment ) {
 399
 400                 if ( $new_status == $old_status )
 401                         return;
 402
 403                 # we don't need to record a history item for deleted comments
 404                 if ( $new_status == 'delete' )
 405                         return;
 406
 407                 if ( !current_user_can( 'edit_post', $comment->comment_post_ID ) && !current_user_can( 'moderate_comments' ) )
 408                         return;
 409
 410                 if ( defined('WP_IMPORTING') && WP_IMPORTING == true )
 411                         return;
 412
 413                 // if this is present, it means the status has been changed by a re-check, not an explicit user action
 414                 if ( get_comment_meta( $comment->comment_ID, 'akismet_rechecking' ) )
 415                         return;
 416
 417                 global $current_user;
 418                 $reporter = '';
 419                 if ( is_object( $current_user ) )
 420                         $reporter = $current_user->user_login;
 421
 422                 // Assumption alert:
 423                 // We want to submit comments to Akismet only when a moderator explicitly spams or approves it - not if the status
 424                 // is changed automatically by another plugin.  Unfortunately WordPress doesn't provide an unambiguous way to
 425                 // determine why the transition_comment_status action was triggered.  And there are several different ways by which
 426                 // to spam and unspam comments: bulk actions, ajax, links in moderation emails, the dashboard, and perhaps others.
 427                 // We'll assume that this is an explicit user action if certain POST/GET variables exist.
 428                 if ( ( isset( $_POST['status'] ) && in_array( $_POST['status'], array( 'spam', 'unspam' ) ) ) ||
 429                          ( isset( $_POST['spam'] )   && (int) $_POST['spam'] == 1 ) ||
 430                          ( isset( $_POST['unspam'] ) && (int) $_POST['unspam'] == 1 ) ||
 431                          ( isset( $_POST['comment_status'] )  && in_array( $_POST['comment_status'], array( 'spam', 'unspam' ) ) ) ||
 432                          ( isset( $_GET['action'] )  && in_array( $_GET['action'], array( 'spam', 'unspam' ) ) ) ||
 433                          ( isset( $_POST['action'] ) && in_array( $_POST['action'], array( 'editedcomment' ) ) )
 434                  ) {
 435                         if ( $new_status == 'spam' && ( $old_status == 'approved' || $old_status == 'unapproved' || !$old_status ) ) {
 436                                 return self::submit_spam_comment( $comment->comment_ID );
 437                         } elseif ( $old_status == 'spam' && ( $new_status == 'approved' || $new_status == 'unapproved' ) ) {
 438                                 return self::submit_nonspam_comment( $comment->comment_ID );
 439                         }
 440                 }
 441
 442                 self::update_comment_history( $comment->comment_ID, sprintf( __('%1$s changed the comment status to %2$s', 'akismet'), $reporter, $new_status ), 'status-' . $new_status );
 443         }
 444
 445         public static function submit_spam_comment( $comment_id ) {
 446                 global $wpdb, $current_user, $current_site;
 447
 448                 $comment_id = (int) $comment_id;
 449
 450                 $comment = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->comments} WHERE comment_ID = %d", $comment_id ) );
 451
 452                 if ( !$comment ) // it was deleted
 453                         return;
 454
 455                 if ( 'spam' != $comment->comment_approved )
 456                         return;
 457
 458                 // use the original version stored in comment_meta if available
 459                 $as_submitted = get_comment_meta( $comment_id, 'akismet_as_submitted', true);
 460
 461                 if ( $as_submitted && is_array( $as_submitted ) && isset( $as_submitted['comment_content'] ) )
 462                         $comment = (object) array_merge( (array)$comment, $as_submitted );
 463
 464                 $comment->blog         = get_bloginfo('url');
 465                 $comment->blog_lang    = get_locale();
 466                 $comment->blog_charset = get_option('blog_charset');
 467                 $comment->permalink    = get_permalink($comment->comment_post_ID);
 468
 469                 if ( is_object($current_user) )
 470                         $comment->reporter = $current_user->user_login;
 471
 472                 if ( is_object($current_site) )
 473                         $comment->site_domain = $current_site->domain;
 474
 475                 $comment->user_role = '';
 476                 if ( isset( $comment->user_ID ) )
 477                         $comment->user_role = Akismet::get_user_roles( $comment->user_ID );
 478
 479                 if ( self::is_test_mode() )
 480                         $comment->is_test = 'true';
 481
 482                 $post = get_post( $comment->comment_post_ID );
 483                 $comment->comment_post_modified_gmt = $post->post_modified_gmt;
 484
 485                 $response = Akismet::http_post( Akismet::build_query( $comment ), 'submit-spam' );
 486                 if ( $comment->reporter ) {
 487                         self::update_comment_history( $comment_id, sprintf( __('%s reported this comment as spam', 'akismet'), $comment->reporter ), 'report-spam' );
 488                         update_comment_meta( $comment_id, 'akismet_user_result', 'true' );
 489                         update_comment_meta( $comment_id, 'akismet_user', $comment->reporter );
 490                 }
 491
 492                 do_action('akismet_submit_spam_comment', $comment_id, $response[1]);
 493         }
 494
 495         public static function submit_nonspam_comment( $comment_id ) {
 496                 global $wpdb, $current_user, $current_site;
 497
 498                 $comment_id = (int) $comment_id;
 499
 500                 $comment = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->comments} WHERE comment_ID = %d", $comment_id ) );
 501                 if ( !$comment ) // it was deleted
 502                         return;
 503
 504                 // use the original version stored in comment_meta if available
 505                 $as_submitted = get_comment_meta( $comment_id, 'akismet_as_submitted', true);
 506
 507                 if ( $as_submitted && is_array($as_submitted) && isset($as_submitted['comment_content']) )
 508                         $comment = (object) array_merge( (array)$comment, $as_submitted );
 509
 510                 $comment->blog         = get_bloginfo('url');
 511                 $comment->blog_lang    = get_locale();
 512                 $comment->blog_charset = get_option('blog_charset');
 513                 $comment->permalink    = get_permalink( $comment->comment_post_ID );
 514                 $comment->user_role    = '';
 515
 516                 if ( is_object($current_user) )
 517                         $comment->reporter = $current_user->user_login;
 518
 519                 if ( is_object($current_site) )
 520                         $comment->site_domain = $current_site->domain;
 521
 522                 if ( isset( $comment->user_ID ) )
 523                         $comment->user_role = Akismet::get_user_roles($comment->user_ID);
 524
 525                 if ( Akismet::is_test_mode() )
 526                         $comment->is_test = 'true';
 527
 528                 $post = get_post( $comment->comment_post_ID );
 529                 $comment->comment_post_modified_gmt = $post->post_modified_gmt;
 530
 531                 $response = self::http_post( Akismet::build_query( $comment ), 'submit-ham' );
 532                 if ( $comment->reporter ) {
 533                         self::update_comment_history( $comment_id, sprintf( __('%s reported this comment as not spam', 'akismet'), $comment->reporter ), 'report-ham' );
 534                         update_comment_meta( $comment_id, 'akismet_user_result', 'false' );
 535                         update_comment_meta( $comment_id, 'akismet_user', $comment->reporter );
 536                 }
 537
 538                 do_action('akismet_submit_nonspam_comment', $comment_id, $response[1]);
 539         }
 540
 541         public static function cron_recheck() {
 542                 global $wpdb;
 543
 544                 $api_key = self::get_api_key();
 545
 546                 $status = self::verify_key( $api_key );
 547                 if ( get_option( 'akismet_alert_code' ) || $status == 'invalid' ) {
 548                         // since there is currently a problem with the key, reschedule a check for 6 hours hence
 549                         wp_schedule_single_event( time() + 21600, 'akismet_schedule_cron_recheck' );
 550                         return false;
 551                 }
 552
 553                 delete_option('akismet_available_servers');
 554
 555                 $comment_errors = $wpdb->get_col( "SELECT comment_id FROM {$wpdb->commentmeta} WHERE meta_key = 'akismet_error' LIMIT 100" );
 556
 557                 load_plugin_textdomain( 'akismet' );
 558
 559                 foreach ( (array) $comment_errors as $comment_id ) {
 560                         // if the comment no longer exists, or is too old, remove the meta entry from the queue to avoid getting stuck
 561                         $comment = get_comment( $comment_id );
 562                         if ( !$comment || strtotime( $comment->comment_date_gmt ) < strtotime( "-15 days" ) ) {
 563                                 delete_comment_meta( $comment_id, 'akismet_error' );
 564                                 delete_comment_meta( $comment_id, 'akismet_delayed_moderation_email' );
 565                                 continue;
 566                         }
 567
 568                         add_comment_meta( $comment_id, 'akismet_rechecking', true );
 569                         $status = self::check_db_comment( $comment_id, 'retry' );
 570
 571                         $msg = '';
 572                         if ( $status == 'true' ) {
 573                                 $msg = __( 'Akismet caught this comment as spam during an automatic retry.' , 'akismet');
 574                         } elseif ( $status == 'false' ) {
 575                                 $msg = __( 'Akismet cleared this comment during an automatic retry.' , 'akismet');
 576                         }
 577
 578                         // If we got back a legit response then update the comment history
 579                         // other wise just bail now and try again later.  No point in
 580                         // re-trying all the comments once we hit one failure.
 581                         if ( !empty( $msg ) ) {
 582                                 delete_comment_meta( $comment_id, 'akismet_error' );
 583                                 self::update_comment_history( $comment_id, $msg, 'cron-retry' );
 584                                 update_comment_meta( $comment_id, 'akismet_result', $status );
 585                                 // make sure the comment status is still pending.  if it isn't, that means the user has already moved it elsewhere.
 586                                 $comment = get_comment( $comment_id );
 587                                 if ( $comment && 'unapproved' == wp_get_comment_status( $comment_id ) ) {
 588                                         if ( $status == 'true' ) {
 589                                                 wp_spam_comment( $comment_id );
 590                                         } elseif ( $status == 'false' ) {
 591                                                 // comment is good, but it's still in the pending queue.  depending on the moderation settings
 592                                                 // we may need to change it to approved.
 593                                                 if ( check_comment($comment->comment_author, $comment->comment_author_email, $comment->comment_author_url, $comment->comment_content, $comment->comment_author_IP, $comment->comment_agent, $comment->comment_type) )
 594                                                         wp_set_comment_status( $comment_id, 1 );
 595                                                 else if ( get_comment_meta( $comment_id, 'akismet_delayed_moderation_email', true ) )
 596                                                         wp_notify_moderator( $comment_id );
 597                                         }
 598                                 }
 599
 600                                 delete_comment_meta( $comment_id, 'akismet_delayed_moderation_email' );
 601                         } else {
 602                                 // If this comment has been pending moderation for longer than MAX_DELAY_BEFORE_MODERATION_EMAIL,
 603                                 // send a moderation email now.
 604                                 if ( ( intval( gmdate( 'U' ) ) - strtotime( $comment->comment_date_gmt ) ) < self::MAX_DELAY_BEFORE_MODERATION_EMAIL ) {
 605                                         delete_comment_meta( $comment_id, 'akismet_delayed_moderation_email' );
 606                                         wp_notify_moderator( $comment_id );
 607                                 }
 608
 609                                 delete_comment_meta( $comment_id, 'akismet_rechecking' );
 610                                 wp_schedule_single_event( time() + 1200, 'akismet_schedule_cron_recheck' );
 611                                 return;
 612                         }
 613                         delete_comment_meta( $comment_id, 'akismet_rechecking' );
 614                 }
 615
 616                 $remaining = $wpdb->get_var( "SELECT COUNT(*) FROM {$wpdb->commentmeta} WHERE meta_key = 'akismet_error'" );
 617                 if ( $remaining && !wp_next_scheduled('akismet_schedule_cron_recheck') ) {
 618                         wp_schedule_single_event( time() + 1200, 'akismet_schedule_cron_recheck' );
 619                 }
 620         }
 621
 622         public static function fix_scheduled_recheck() {
 623                 $future_check = wp_next_scheduled( 'akismet_schedule_cron_recheck' );
 624                 if ( !$future_check ) {
 625                         return;
 626                 }
 627
 628                 if ( get_option( 'akismet_alert_code' ) > 0 ) {
 629                         return;
 630                 }
 631
 632                 $check_range = time() + 1200;
 633                 if ( $future_check > $check_range ) {
 634                         wp_clear_scheduled_hook( 'akismet_schedule_cron_recheck' );
 635                         wp_schedule_single_event( time() + 300, 'akismet_schedule_cron_recheck' );
 636                 }
 637         }
 638
 639         public static function add_comment_nonce( $post_id ) {
 640                 echo '<p style="display: none;">';
 641                 wp_nonce_field( 'akismet_comment_nonce_' . $post_id, 'akismet_comment_nonce', FALSE );
 642                 echo '</p>';
 643         }
 644
 645         public static function is_test_mode() {
 646                 return defined('AKISMET_TEST_MODE') && AKISMET_TEST_MODE;
 647         }
 648
 649         public static function allow_discard() {
 650                 if ( defined( 'DOING_AJAX' ) && DOING_AJAX )
 651                         return false;
 652                 if ( is_user_logged_in() )
 653                         return false;
 654
 655                 return ( get_option( 'akismet_strictness' ) === '1'  );
 656         }
 657
 658         public static function get_ip_address() {
 659                 return isset( $_SERVER['REMOTE_ADDR'] ) ? $_SERVER['REMOTE_ADDR'] : null;
 660         }
 661
 662         /**
 663          * Do these two comments, without checking the comment_ID, "match"?
 664          *
 665          * @param mixed $comment1 A comment object or array.
 666          * @param mixed $comment2 A comment object or array.
 667          * @return bool Whether the two comments should be treated as the same comment.
 668          */
 669         private static function comments_match( $comment1, $comment2 ) {
 670                 $comment1 = (array) $comment1;
 671                 $comment2 = (array) $comment2;
 672
 673                 return (
 674                            isset( $comment1['comment_post_ID'], $comment2['comment_post_ID'] )
 675                         && intval( $comment1['comment_post_ID'] ) == intval( $comment2['comment_post_ID'] )
 676                         && $comment1['comment_author'] == $comment2['comment_author']
 677                         && $comment1['comment_author_email'] == $comment2['comment_author_email']
 678                 );
 679         }
 680
 681         // Does the supplied comment match the details of the one most recently stored in self::$last_comment?
 682         public static function matches_last_comment( $comment ) {
 683                 if ( is_object( $comment ) )
 684                         $comment = (array) $comment;
 685
 686                 return self::comments_match( self::$last_comment, $comment );
 687         }
 688
 689         private static function get_user_agent() {
 690                 return isset( $_SERVER['HTTP_USER_AGENT'] ) ? $_SERVER['HTTP_USER_AGENT'] : null;
 691         }
 692
 693         private static function get_referer() {
 694                 return isset( $_SERVER['HTTP_REFERER'] ) ? $_SERVER['HTTP_REFERER'] : null;
 695         }
 696
 697         // return a comma-separated list of role names for the given user
 698         public static function get_user_roles( $user_id ) {
 699                 $roles = false;
 700
 701                 if ( !class_exists('WP_User') )
 702                         return false;
 703
 704                 if ( $user_id > 0 ) {
 705                         $comment_user = new WP_User( $user_id );
 706                         if ( isset( $comment_user->roles ) )
 707                                 $roles = join( ',', $comment_user->roles );
 708                 }
 709
 710                 if ( is_multisite() && is_super_admin( $user_id ) ) {
 711                         if ( empty( $roles ) ) {
 712                                 $roles = 'super_admin';
 713                         } else {
 714                                 $comment_user->roles[] = 'super_admin';
 715                                 $roles = join( ',', $comment_user->roles );
 716                         }
 717                 }
 718
 719                 return $roles;
 720         }
 721
 722         // filter handler used to return a spam result to pre_comment_approved
 723         public static function last_comment_status( $approved, $comment ) {
 724                 // Only do this if it's the correct comment
 725                 if ( is_null(self::$last_comment_result) || ! self::matches_last_comment( $comment ) ) {
 726                         self::log( "comment_is_spam mismatched comment, returning unaltered $approved" );
 727                         return $approved;
 728                 }
 729
 730                 // bump the counter here instead of when the filter is added to reduce the possibility of overcounting
 731                 if ( $incr = apply_filters('akismet_spam_count_incr', 1) )
 732                         update_option( 'akismet_spam_count', get_option('akismet_spam_count') + $incr );
 733
 734                 return self::$last_comment_result;
 735         }
 736
 737         /**
 738          * If Akismet is temporarily unreachable, we don't want to "spam" the blogger with
 739          * moderation emails for comments that will be automatically cleared or spammed on
 740          * the next retry.
 741          *
 742          * For comments that will be rechecked later, empty the list of email addresses that
 743          * the moderation email would be sent to.
 744          *
 745          * @param array $emails An array of email addresses that the moderation email will be sent to.
 746          * @param int $comment_id The ID of the relevant comment.
 747          * @return array An array of email addresses that the moderation email will be sent to.
 748          */
 749         public static function disable_moderation_emails_if_unreachable( $emails, $comment_id ) {
 750                 if ( ! empty( self::$prevent_moderation_email_for_these_comments ) && ! empty( $emails ) ) {
 751                         $comment = get_comment( $comment_id );
 752
 753                         foreach ( self::$prevent_moderation_email_for_these_comments as $possible_match ) {
 754                                 if ( self::comments_match( $possible_match, $comment ) ) {
 755                                         update_comment_meta( $comment_id, 'akismet_delayed_moderation_email', true );
 756                                         return array();
 757                                 }
 758                         }
 759                 }
 760
 761                 return $emails;
 762         }
 763
 764         public static function _cmp_time( $a, $b ) {
 765                 return $a['time'] > $b['time'] ? -1 : 1;
 766         }
 767
 768         public static function _get_microtime() {
 769                 $mtime = explode( ' ', microtime() );
 770                 return $mtime[1] + $mtime[0];
 771         }
 772
 773         /**
 774          * Make a POST request to the Akismet API.
 775          *
 776          * @param string $request The body of the request.
 777          * @param string $path The path for the request.
 778          * @param string $ip The specific IP address to hit.
 779          * @return array A two-member array consisting of the headers and the response body, both empty in the case of a failure.
 780          */
 781         public static function http_post( $request, $path, $ip=null ) {
 782
 783                 $akismet_ua = sprintf( 'WordPress/%s | Akismet/%s', $GLOBALS['wp_version'], constant( 'AKISMET_VERSION' ) );
 784                 $akismet_ua = apply_filters( 'akismet_ua', $akismet_ua );
 785
 786                 $content_length = strlen( $request );
 787
 788                 $api_key   = self::get_api_key();
 789                 $host      = self::API_HOST;
 790
 791                 if ( !empty( $api_key ) )
 792                         $host = $api_key.'.'.$host;
 793
 794                 $http_host = $host;
 795                 // use a specific IP if provided
 796                 // needed by Akismet_Admin::check_server_connectivity()
 797                 if ( $ip && long2ip( ip2long( $ip ) ) ) {
 798                         $http_host = $ip;
 799                 }
 800
 801                 $http_args = array(
 802                         'body' => $request,
 803                         'headers' => array(
 804                                 'Content-Type' => 'application/x-www-form-urlencoded; charset=' . get_option( 'blog_charset' ),
 805                                 'Host' => $host,
 806                                 'User-Agent' => $akismet_ua,
 807                         ),
 808                         'httpversion' => '1.0',
 809                         'timeout' => 15
 810                 );
 811
 812                 $akismet_url = "http://{$http_host}/1.1/{$path}";
 813                 $response = wp_remote_post( $akismet_url, $http_args );
 814                 Akismet::log( compact( 'akismet_url', 'http_args', 'response' ) );
 815                 if ( is_wp_error( $response ) )
 816                         return array( '', '' );
 817
 818                 return array( $response['headers'], $response['body'] );
 819         }
 820
 821         // given a response from an API call like check_key_status(), update the alert code options if an alert is present.
 822         private static function update_alert( $response ) {
 823                 $code = $msg = null;
 824                 if ( isset( $response[0]['x-akismet-alert-code'] ) ) {
 825                         $code = $response[0]['x-akismet-alert-code'];
 826                         $msg  = $response[0]['x-akismet-alert-msg'];
 827                 }
 828
 829                 // only call update_option() if the value has changed
 830                 if ( $code != get_option( 'akismet_alert_code' ) ) {
 831                         if ( ! $code ) {
 832                                 delete_option( 'akismet_alert_code' );
 833                                 delete_option( 'akismet_alert_msg' );
 834                         }
 835                         else {
 836                                 update_option( 'akismet_alert_code', $code );
 837                                 update_option( 'akismet_alert_msg', $msg );
 838                         }
 839                 }
 840         }
 841
 842         public static function load_form_js() {
 843                 // WP < 3.3 can't enqueue a script this late in the game and still have it appear in the footer.
 844                 // Once we drop support for everything pre-3.3, this can change back to a single enqueue call.
 845                 wp_register_script( 'akismet-form', AKISMET__PLUGIN_URL . '_inc/form.js', array(), AKISMET_VERSION, true );
 846                 add_action( 'wp_footer', array( 'Akismet', 'print_form_js' ) );
 847                 add_action( 'admin_footer', array( 'Akismet', 'print_form_js' ) );
 848         }
 849
 850         public static function print_form_js() {
 851                 wp_print_scripts( 'akismet-form' );
 852         }
 853
 854         public static function inject_ak_js( $fields ) {
 855                 echo '<p style="display: none;">';
 856                 echo '<input type="hidden" id="ak_js" name="ak_js" value="' . mt_rand( 0, 250 ) . '"/>';
 857                 echo '</p>';
 858         }
 859
 860         private static function bail_on_activation( $message, $deactivate = true ) {
 861 ?>
 862 <!doctype html>
 863 <html>
 864 <head>
 865 <meta charset="<?php bloginfo( 'charset' ); ?>">
 866 <style>
 867 * {
 868         text-align: center;
 869         margin: 0;
 870         padding: 0;
 871         font-family: "Lucida Grande",Verdana,Arial,"Bitstream Vera Sans",sans-serif;
 872 }
 873 p {
 874         margin-top: 1em;
 875         font-size: 18px;
 876 }
 877 </style>
 878 <body>
 879 <p><?php echo esc_html( $message ); ?></p>
 880 </body>
 881 </html>
 882 <?php
 883                 if ( $deactivate ) {
 884                         $plugins = get_option( 'active_plugins' );
 885                         $akismet = plugin_basename( AKISMET__PLUGIN_DIR . 'akismet.php' );
 886                         $update  = false;
 887                         foreach ( $plugins as $i => $plugin ) {
 888                                 if ( $plugin === $akismet ) {
 889                                         $plugins[$i] = false;
 890                                         $update = true;
 891                                 }
 892                         }
 893
 894                         if ( $update ) {
 895                                 update_option( 'active_plugins', array_filter( $plugins ) );
 896                         }
 897                 }
 898                 exit;
 899         }
 900
 901         public static function view( $name, array $args = array() ) {
 902                 $args = apply_filters( 'akismet_view_arguments', $args, $name );
 903
 904                 foreach ( $args AS $key => $val ) {
 905                         $$key = $val;
 906                 }
 907
 908                 load_plugin_textdomain( 'akismet' );
 909
 910                 $file = AKISMET__PLUGIN_DIR . 'views/'. $name . '.php';
 911
 912                 include( $file );
 913         }
 914
 915         /**
 916          * Attached to activate_{ plugin_basename( __FILES__ ) } by register_activation_hook()
 917          * @static
 918          */
 919         public static function plugin_activation() {
 920                 if ( version_compare( $GLOBALS['wp_version'], AKISMET__MINIMUM_WP_VERSION, '<' ) ) {
 921                         load_plugin_textdomain( 'akismet' );
 922
 923                         $message = '<strong>'.sprintf(esc_html__( 'Akismet %s requires WordPress %s or higher.' , 'akismet'), AKISMET_VERSION, AKISMET__MINIMUM_WP_VERSION ).'</strong> '.sprintf(__('Please <a href="%1$s">upgrade WordPress</a> to a current version, or <a href="%2$s">downgrade to version 2.4 of the Akismet plugin</a>.', 'akismet'), 'https://codex.wordpress.org/Upgrading_WordPress', 'http://wordpress.org/extend/plugins/akismet/download/');
 924
 925                         Akismet::bail_on_activation( $message );
 926                 }
 927         }
 928
 929         /**
 930          * Removes all connection options
 931          * @static
 932          */
 933         public static function plugin_deactivation( ) {
 934                 //tidy up
 935         }
 936
 937         /**
 938          * Essentially a copy of WP's build_query but one that doesn't expect pre-urlencoded values.
 939          *
 940          * @param array $args An array of key => value pairs
 941          * @return string A string ready for use as a URL query string.
 942          */
 943         public static function build_query( $args ) {
 944                 return _http_build_query( $args, '', '&' );
 945         }
 946
 947         /**
 948          * Log debugging info to the error log.
 949          *
 950          * Enabled when WP_DEBUG_LOG is enabled, but can be disabled via the akismet_debug_log filter.
 951          *
 952          * @param mixed $akismet_debug The data to log.
 953          */
 954         public static function log( $akismet_debug ) {
 955                 if ( apply_filters( 'akismet_debug_log', defined( 'WP_DEBUG_LOG' ) && WP_DEBUG_LOG ) ) {
 956                         error_log( print_r( compact( 'akismet_debug' ), true ) );
 957                 }
 958         }
 959 }