X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/ceb5a929e00123b4e224977c6b5a149f6431b250..41578db67d72562346e4dbb2a14889b23d522813:/wp-content/plugins/akismet/class.akismet.php

diff --git a/wp-content/plugins/akismet/class.akismet.php b/wp-content/plugins/akismet/class.akismet.php
new file mode 100644
index 00000000..7cf813d8
--- /dev/null
+++ b/wp-content/plugins/akismet/class.akismet.php
@@ -0,0 +1,764 @@
+<?php
+
+class Akismet {
+	const API_HOST = 'rest.akismet.com';
+	const API_PORT = 80;
+	const MAX_DELAY_BEFORE_MODERATION_EMAIL = 86400; // One day in seconds
+
+	private static $last_comment = '';
+	private static $initiated = false;
+	private static $prevent_moderation_email_for_these_comments = array();
+	private static $last_comment_result = null;
+	
+	public static function init() {
+		if ( ! self::$initiated ) {
+			self::init_hooks();
+		}
+	}
+
+	/**
+	 * Initializes WordPress hooks
+	 */
+	private static function init_hooks() {
+		self::$initiated = true;
+
+		add_action( 'wp_insert_comment', array( 'Akismet', 'auto_check_update_meta' ), 10, 2 );
+		add_action( 'preprocess_comment', array( 'Akismet', 'auto_check_comment' ), 1 );
+		add_action( 'akismet_scheduled_delete', array( 'Akismet', 'delete_old_comments' ) );
+		add_action( 'akismet_scheduled_delete', array( 'Akismet', 'delete_old_comments_meta' ) );
+		add_action( 'akismet_schedule_cron_recheck', array( 'Akismet', 'cron_recheck' ) );
+
+		$akismet_comment_nonce_option = apply_filters( 'akismet_comment_nonce', get_option( 'akismet_comment_nonce' ) );
+
+		if ( $akismet_comment_nonce_option == 'true' || $akismet_comment_nonce_option == '' )
+			add_action( 'comment_form',  array( 'Akismet',  'add_comment_nonce' ), 1 );
+
+		add_action( 'admin_footer-edit-comments.php', array( 'Akismet', 'load_form_js' ) );
+		add_action( 'comment_form', array( 'Akismet', 'load_form_js' ) );
+		add_action( 'comment_form', array( 'Akismet', 'inject_ak_js' ) );
+
+		add_filter( 'comment_moderation_recipients', array( 'Akismet', 'disable_moderation_emails_if_unreachable' ), 1000, 2 );
+		add_filter( 'pre_comment_approved', array( 'Akismet', 'last_comment_status' ), 10, 2 );
+
+		if ( '3.0.5' == $GLOBALS['wp_version'] ) {
+			remove_filter( 'comment_text', 'wp_kses_data' );
+			if ( is_admin() )
+				add_filter( 'comment_text', 'wp_kses_post' );
+		}
+	}
+
+	public static function get_api_key() {
+		return defined('WPCOM_API_KEY') ? constant('WPCOM_API_KEY') : get_option('wordpress_api_key');
+	}
+
+	public static function check_key_status( $key, $ip = null ) {
+		return self::http_post( http_build_query( array( 'key' => $key, 'blog' => get_option('home') ) ), 'verify-key', $ip );
+	}
+
+	public static function verify_key( $key, $ip = null ) {
+		$response = self::check_key_status( $key, $ip );
+
+		if ( $response[1] != 'valid' && $response[1] != 'invalid' )
+			return 'failed';
+
+		self::update_alert( $response );
+
+		return $response[1];
+	}
+
+	public static function auto_check_comment( $commentdata ) {
+		self::$last_comment_result = null;
+
+		$comment = $commentdata;
+
+		$comment['user_ip']      = self::get_ip_address();
+		$comment['user_agent']   = self::get_user_agent();
+		$comment['referrer']     = self::get_referer();
+		$comment['blog']         = get_option('home');
+		$comment['blog_lang']    = get_locale();
+		$comment['blog_charset'] = get_option('blog_charset');
+		$comment['permalink']    = get_permalink( $comment['comment_post_ID'] );
+
+		if ( !empty( $comment['user_ID'] ) )
+			$comment['user_role'] = Akismet::get_user_roles( $comment['user_ID'] );
+
+		$akismet_nonce_option = apply_filters( 'akismet_comment_nonce', get_option( 'akismet_comment_nonce' ) );
+		$comment['akismet_comment_nonce'] = 'inactive';
+		if ( $akismet_nonce_option == 'true' || $akismet_nonce_option == '' ) {
+			$comment['akismet_comment_nonce'] = 'failed';
+			if ( isset( $_POST['akismet_comment_nonce'] ) && wp_verify_nonce( $_POST['akismet_comment_nonce'], 'akismet_comment_nonce_' . $comment['comment_post_ID'] ) )
+				$comment['akismet_comment_nonce'] = 'passed';
+
+			// comment reply in wp-admin
+			if ( isset( $_POST['_ajax_nonce-replyto-comment'] ) && check_ajax_referer( 'replyto-comment', '_ajax_nonce-replyto-comment' ) )
+				$comment['akismet_comment_nonce'] = 'passed';
+
+		}
+
+		if ( self::is_test_mode() )
+			$comment['is_test'] = 'true';
+
+		foreach( $_POST as $key => $value ) {
+			if ( is_string( $value ) )
+				$comment["POST_{$key}"] = $value;
+		}
+
+		$ignore = array( 'HTTP_COOKIE', 'HTTP_COOKIE2', 'PHP_AUTH_PW' );
+
+		foreach ( $_SERVER as $key => $value ) {
+			if ( !in_array( $key, $ignore ) && is_string($value) )
+				$comment["$key"] = $value;
+			else
+				$comment["$key"] = '';
+		}
+
+		$post = get_post( $comment['comment_post_ID'] );
+		$comment[ 'comment_post_modified_gmt' ] = $post->post_modified_gmt;
+
+		$response = self::http_post( http_build_query( $comment ), 'comment-check' );
+
+		do_action( 'akismet_comment_check_response', $response );
+
+		self::update_alert( $response );
+
+		$commentdata['comment_as_submitted'] = $comment;
+		$commentdata['akismet_result']       = $response[1];
+
+		if ( isset( $response[0]['x-akismet-pro-tip'] ) )
+	        $commentdata['akismet_pro_tip'] = $response[0]['x-akismet-pro-tip'];
+
+		if ( 'true' == $response[1] ) {
+			// akismet_spam_count will be incremented later by comment_is_spam()
+			self::$last_comment_result = 'spam';
+
+			$discard = ( isset( $commentdata['akismet_pro_tip'] ) && $commentdata['akismet_pro_tip'] === 'discard' && self::allow_discard() );
+
+			do_action( 'akismet_spam_caught', $discard );
+
+			if ( $discard ) {
+				// akismet_result_spam() won't be called so bump the counter here
+				if ( $incr = apply_filters('akismet_spam_count_incr', 1) )
+					update_option( 'akismet_spam_count', get_option('akismet_spam_count') + $incr );
+				$redirect_to = isset( $_SERVER['HTTP_REFERER'] ) ? $_SERVER['HTTP_REFERER'] : get_permalink( $post );
+				wp_safe_redirect( esc_url_raw( $redirect_to ) );
+				die();
+			}
+		}
+		
+		// if the response is neither true nor false, hold the comment for moderation and schedule a recheck
+		if ( 'true' != $response[1] && 'false' != $response[1] ) {
+			if ( !current_user_can('moderate_comments') ) {
+				// Comment status should be moderated
+				self::$last_comment_result = '0';
+			}
+			if ( function_exists('wp_next_scheduled') && function_exists('wp_schedule_single_event') ) {
+				if ( !wp_next_scheduled( 'akismet_schedule_cron_recheck' ) ) {
+					wp_schedule_single_event( time() + 1200, 'akismet_schedule_cron_recheck' );
+				}
+			}
+
+			self::$prevent_moderation_email_for_these_comments[] = $commentdata;
+		}
+
+		if ( function_exists('wp_next_scheduled') && function_exists('wp_schedule_event') ) {
+			// WP 2.1+: delete old comments daily
+			if ( !wp_next_scheduled( 'akismet_scheduled_delete' ) )
+				wp_schedule_event( time(), 'daily', 'akismet_scheduled_delete' );
+		}
+		elseif ( (mt_rand(1, 10) == 3) ) {
+			// WP 2.0: run this one time in ten
+			self::delete_old_comments();
+		}
+		
+		self::set_last_comment( $commentdata );
+		self::fix_scheduled_recheck();
+
+		return self::$last_comment;
+	}
+	
+	public static function get_last_comment() {
+		return self::$last_comment;
+	}
+	
+	public static function set_last_comment( $comment ) {
+		if ( is_null( $comment ) ) {
+			self::$last_comment = null;
+		}
+		else {
+			// We filter it here so that it matches the filtered comment data that we'll have to compare against later.
+			// wp_filter_comment expects comment_author_IP
+			self::$last_comment = wp_filter_comment(
+				array_merge(
+					array( 'comment_author_IP' => self::get_ip_address() ),
+					$comment
+				)
+			);
+		}
+	}
+
+	// this fires on wp_insert_comment.  we can't update comment_meta when auto_check_comment() runs
+	// because we don't know the comment ID at that point.
+	public static function auto_check_update_meta( $id, $comment ) {
+
+		// failsafe for old WP versions
+		if ( !function_exists('add_comment_meta') )
+			return false;
+
+		if ( !isset( self::$last_comment['comment_author_email'] ) )
+			self::$last_comment['comment_author_email'] = '';
+
+		// wp_insert_comment() might be called in other contexts, so make sure this is the same comment
+		// as was checked by auto_check_comment
+		if ( is_object( $comment ) && !empty( self::$last_comment ) && is_array( self::$last_comment ) ) {
+			if ( self::matches_last_comment( $comment ) ) {
+					
+					load_plugin_textdomain( 'akismet' );
+					
+					// normal result: true or false
+					if ( self::$last_comment['akismet_result'] == 'true' ) {
+						update_comment_meta( $comment->comment_ID, 'akismet_result', 'true' );
+						self::update_comment_history( $comment->comment_ID, __('Akismet caught this comment as spam', 'akismet'), 'check-spam' );
+						if ( $comment->comment_approved != 'spam' )
+							self::update_comment_history( $comment->comment_ID, sprintf( __('Comment status was changed to %s', 'akismet'), $comment->comment_approved), 'status-changed'.$comment->comment_approved );
+					}
+					elseif ( self::$last_comment['akismet_result'] == 'false' ) {
+						update_comment_meta( $comment->comment_ID, 'akismet_result', 'false' );
+						self::update_comment_history( $comment->comment_ID, __('Akismet cleared this comment', 'akismet'), 'check-ham' );
+						if ( $comment->comment_approved == 'spam' ) {
+							if ( wp_blacklist_check($comment->comment_author, $comment->comment_author_email, $comment->comment_author_url, $comment->comment_content, $comment->comment_author_IP, $comment->comment_agent) )
+								self::update_comment_history( $comment->comment_ID, __('Comment was caught by wp_blacklist_check', 'akismet'), 'wp-blacklisted' );
+							else
+								self::update_comment_history( $comment->comment_ID, sprintf( __('Comment status was changed to %s', 'akismet'), $comment->comment_approved), 'status-changed-'.$comment->comment_approved );
+						}
+					} // abnormal result: error
+					else {
+						update_comment_meta( $comment->comment_ID, 'akismet_error', time() );
+						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' );
+					}
+
+					// record the complete original data as submitted for checking
+					if ( isset( self::$last_comment['comment_as_submitted'] ) )
+						update_comment_meta( $comment->comment_ID, 'akismet_as_submitted', self::$last_comment['comment_as_submitted'] );
+
+					if ( isset( self::$last_comment['akismet_pro_tip'] ) )
+						update_comment_meta( $comment->comment_ID, 'akismet_pro_tip', self::$last_comment['akismet_pro_tip'] );
+			}
+		}
+	}
+
+	public static function delete_old_comments() {
+		global $wpdb;
+
+		while( $comment_ids = $wpdb->get_col( $wpdb->prepare( "SELECT comment_id FROM {$wpdb->comments} WHERE DATE_SUB(NOW(), INTERVAL 15 DAY) > comment_date_gmt AND comment_approved = 'spam' LIMIT %d", defined( 'AKISMET_DELETE_LIMIT' ) ? AKISMET_DELETE_LIMIT : 10000 ) ) ) {
+			if ( empty( $comment_ids ) )
+				return;
+
+			$wpdb->queries = array();
+
+			do_action( 'delete_comment', $comment_ids );
+
+			$comma_comment_ids = implode( ', ', array_map('intval', $comment_ids) );
+
+			$wpdb->query("DELETE FROM {$wpdb->comments} WHERE comment_id IN ( $comma_comment_ids )");
+			$wpdb->query("DELETE FROM {$wpdb->commentmeta} WHERE comment_id IN ( $comma_comment_ids )");
+
+			clean_comment_cache( $comment_ids );
+		}
+
+		if ( apply_filters( 'akismet_optimize_table', ( mt_rand(1, 5000) == 11), $wpdb->comments ) ) // lucky number
+			$wpdb->query("OPTIMIZE TABLE {$wpdb->comments}");
+	}
+
+	public static function delete_old_comments_meta() {
+		global $wpdb;
+
+		$interval = apply_filters( 'akismet_delete_commentmeta_interval', 15 );
+
+		# enfore a minimum of 1 day
+		$interval = absint( $interval );
+		if ( $interval < 1 )
+			$interval = 1;
+
+		// akismet_as_submitted meta values are large, so expire them
+		// after $interval days regardless of the comment status
+		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 ) ) ) {
+			if ( empty( $comment_ids ) )
+				return;
+
+			$wpdb->queries = array();
+
+			foreach ( $comment_ids as $comment_id ) {
+				delete_comment_meta( $comment_id, 'akismet_as_submitted' );
+			}
+		}
+
+		if ( apply_filters( 'akismet_optimize_table', ( mt_rand(1, 5000) == 11), $wpdb->commentmeta ) ) // lucky number
+			$wpdb->query("OPTIMIZE TABLE {$wpdb->commentmeta}");
+	}
+
+	// how many approved comments does this author have?
+	public static function get_user_comments_approved( $user_id, $comment_author_email, $comment_author, $comment_author_url ) {
+		global $wpdb;
+
+		if ( !empty( $user_id ) )
+			return (int) $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM {$wpdb->comments} WHERE user_id = %d AND comment_approved = 1", $user_id ) );
+
+		if ( !empty( $comment_author_email ) )
+			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 ) );
+
+		return 0;
+	}
+
+	// get the full comment history for a given comment, as an array in reverse chronological order
+	public static function get_comment_history( $comment_id ) {
+
+		// failsafe for old WP versions
+		if ( !function_exists('add_comment_meta') )
+			return false;
+
+		$history = get_comment_meta( $comment_id, 'akismet_history', false );
+		usort( $history, array( 'Akismet', '_cmp_time' ) );
+		return $history;
+	}
+
+	// log an event for a given comment, storing it in comment_meta
+	public static function update_comment_history( $comment_id, $message, $event=null ) {
+		global $current_user;
+
+		// failsafe for old WP versions
+		if ( !function_exists('add_comment_meta') )
+			return false;
+
+		$user = '';
+		if ( is_object( $current_user ) && isset( $current_user->user_login ) )
+			$user = $current_user->user_login;
+
+		$event = array(
+			'time'    => self::_get_microtime(),
+			'message' => $message,
+			'event'   => $event,
+			'user'    => $user,
+		);
+
+		// $unique = false so as to allow multiple values per comment
+		$r = add_comment_meta( $comment_id, 'akismet_history', $event, false );
+	}
+
+	public static function check_db_comment( $id, $recheck_reason = 'recheck_queue' ) {
+		global $wpdb;
+
+		$c = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->comments} WHERE comment_ID = %d", $id ), ARRAY_A );
+		if ( !$c )
+			return;
+
+		$c['user_ip']        = $c['comment_author_IP'];
+		$c['user_agent']     = $c['comment_agent'];
+		$c['referrer']       = '';
+		$c['blog']           = get_option('home');
+		$c['blog_lang']      = get_locale();
+		$c['blog_charset']   = get_option('blog_charset');
+		$c['permalink']      = get_permalink($c['comment_post_ID']);
+		$c['recheck_reason'] = $recheck_reason;
+
+		if ( self::is_test_mode() )
+			$c['is_test'] = 'true';
+
+		$response = self::http_post( http_build_query( $c ), 'comment-check' );
+
+		return ( is_array( $response ) && ! empty( $response[1] ) ) ? $response[1] : false;
+	}
+
+	public static function cron_recheck() {
+		global $wpdb;
+
+		$api_key = self::get_api_key();
+
+		$status = self::verify_key( $api_key );
+		if ( get_option( 'akismet_alert_code' ) || $status == 'invalid' ) {
+			// since there is currently a problem with the key, reschedule a check for 6 hours hence
+			wp_schedule_single_event( time() + 21600, 'akismet_schedule_cron_recheck' );
+			return false;
+		}
+
+		delete_option('akismet_available_servers');
+
+		$comment_errors = $wpdb->get_col( "SELECT comment_id FROM {$wpdb->commentmeta} WHERE meta_key = 'akismet_error'	LIMIT 100" );
+		
+		load_plugin_textdomain( 'akismet' );
+
+		foreach ( (array) $comment_errors as $comment_id ) {
+			// if the comment no longer exists, or is too old, remove the meta entry from the queue to avoid getting stuck
+			$comment = get_comment( $comment_id );
+			if ( !$comment || strtotime( $comment->comment_date_gmt ) < strtotime( "-15 days" ) ) {
+				delete_comment_meta( $comment_id, 'akismet_error' );
+				delete_comment_meta( $comment_id, 'akismet_delayed_moderation_email' );
+				continue;
+			}
+
+			add_comment_meta( $comment_id, 'akismet_rechecking', true );
+			$status = self::check_db_comment( $comment_id, 'retry' );
+
+			$msg = '';
+			if ( $status == 'true' ) {
+				$msg = __( 'Akismet caught this comment as spam during an automatic retry.' , 'akismet');
+			} elseif ( $status == 'false' ) {
+				$msg = __( 'Akismet cleared this comment during an automatic retry.' , 'akismet');
+			}
+
+			// If we got back a legit response then update the comment history
+			// other wise just bail now and try again later.  No point in
+			// re-trying all the comments once we hit one failure.
+			if ( !empty( $msg ) ) {
+				delete_comment_meta( $comment_id, 'akismet_error' );
+				self::update_comment_history( $comment_id, $msg, 'cron-retry' );
+				update_comment_meta( $comment_id, 'akismet_result', $status );
+				// make sure the comment status is still pending.  if it isn't, that means the user has already moved it elsewhere.
+				$comment = get_comment( $comment_id );
+				if ( $comment && 'unapproved' == wp_get_comment_status( $comment_id ) ) {
+					if ( $status == 'true' ) {
+						wp_spam_comment( $comment_id );
+					} elseif ( $status == 'false' ) {
+						// comment is good, but it's still in the pending queue.  depending on the moderation settings
+						// we may need to change it to approved.
+						if ( check_comment($comment->comment_author, $comment->comment_author_email, $comment->comment_author_url, $comment->comment_content, $comment->comment_author_IP, $comment->comment_agent, $comment->comment_type) )
+							wp_set_comment_status( $comment_id, 1 );
+						else if ( get_comment_meta( $comment_id, 'akismet_delayed_moderation_email', true ) )
+							wp_notify_moderator( $comment_id );
+					}
+				}
+				
+				delete_comment_meta( $comment_id, 'akismet_delayed_moderation_email' );
+			} else {
+				// If this comment has been pending moderation for longer than MAX_DELAY_BEFORE_MODERATION_EMAIL,
+				// send a moderation email now.
+				if ( ( intval( gmdate( 'U' ) ) - strtotime( $comment->comment_date_gmt ) ) < self::MAX_DELAY_BEFORE_MODERATION_EMAIL ) {
+					delete_comment_meta( $comment_id, 'akismet_delayed_moderation_email' );
+					wp_notify_moderator( $comment_id );
+				}
+
+				delete_comment_meta( $comment_id, 'akismet_rechecking' );
+				wp_schedule_single_event( time() + 1200, 'akismet_schedule_cron_recheck' );
+				return;
+			}
+			delete_comment_meta( $comment_id, 'akismet_rechecking' );
+		}
+
+		$remaining = $wpdb->get_var( "SELECT COUNT(*) FROM {$wpdb->commentmeta} WHERE meta_key = 'akismet_error'" );
+		if ( $remaining && !wp_next_scheduled('akismet_schedule_cron_recheck') ) {
+			wp_schedule_single_event( time() + 1200, 'akismet_schedule_cron_recheck' );
+		}
+	}
+
+	public static function fix_scheduled_recheck() {
+		$future_check = wp_next_scheduled( 'akismet_schedule_cron_recheck' );
+		if ( !$future_check ) {
+			return;
+		}
+
+		if ( get_option( 'akismet_alert_code' ) > 0 ) {
+			return;
+		}
+
+		$check_range = time() + 1200;
+		if ( $future_check > $check_range ) {
+			wp_clear_scheduled_hook( 'akismet_schedule_cron_recheck' );
+			wp_schedule_single_event( time() + 300, 'akismet_schedule_cron_recheck' );
+		}
+	}
+
+	public static function add_comment_nonce( $post_id ) {
+		echo '<p style="display: none;">';
+		wp_nonce_field( 'akismet_comment_nonce_' . $post_id, 'akismet_comment_nonce', FALSE );
+		echo '</p>';
+	}
+
+	public static function is_test_mode() {
+		return defined('AKISMET_TEST_MODE') && AKISMET_TEST_MODE;
+	}
+	
+	public static function allow_discard() {
+		if ( defined( 'DOING_AJAX' ) && DOING_AJAX )
+			return false;
+		if ( is_user_logged_in() )
+			return false;
+	
+		return ( get_option( 'akismet_strictness' ) === '1'  );
+	}
+
+	public static function get_ip_address() {
+		return isset( $_SERVER['REMOTE_ADDR'] ) ? $_SERVER['REMOTE_ADDR'] : null;
+	}
+	
+	/**
+	 * Do these two comments, without checking the comment_ID, "match"?
+	 *
+	 * @param mixed $comment1 A comment object or array.
+	 * @param mixed $comment2 A comment object or array.
+	 * @return bool Whether the two comments should be treated as the same comment.
+	 */
+	private static function comments_match( $comment1, $comment2 ) {
+		$comment1 = (array) $comment1;
+		$comment2 = (array) $comment2;
+		
+		return (
+			   isset( $comment1['comment_post_ID'], $comment2['comment_post_ID'] )
+			&& intval( $comment1['comment_post_ID'] ) == intval( $comment2['comment_post_ID'] )
+			&& $comment1['comment_author'] == $comment2['comment_author']
+			&& $comment1['comment_author_email'] == $comment2['comment_author_email']
+		);
+	}
+	
+	// Does the supplied comment match the details of the one most recently stored in self::$last_comment?
+	public static function matches_last_comment( $comment ) {
+		if ( is_object( $comment ) )
+			$comment = (array) $comment;
+
+		return self::comments_match( self::$last_comment, $comment );
+	}
+
+	private static function get_user_agent() {
+		return isset( $_SERVER['HTTP_USER_AGENT'] ) ? $_SERVER['HTTP_USER_AGENT'] : null;
+	}
+
+	private static function get_referer() {
+		return isset( $_SERVER['HTTP_REFERER'] ) ? $_SERVER['HTTP_REFERER'] : null;
+	}
+
+	// return a comma-separated list of role names for the given user
+	public static function get_user_roles( $user_id ) {
+		$roles = false;
+
+		if ( !class_exists('WP_User') )
+			return false;
+
+		if ( $user_id > 0 ) {
+			$comment_user = new WP_User( $user_id );
+			if ( isset( $comment_user->roles ) )
+				$roles = join( ',', $comment_user->roles );
+		}
+
+		if ( is_multisite() && is_super_admin( $user_id ) ) {
+			if ( empty( $roles ) ) {
+				$roles = 'super_admin';
+			} else {
+				$comment_user->roles[] = 'super_admin';
+				$roles = join( ',', $comment_user->roles );
+			}
+		}
+
+		return $roles;
+	}
+
+	// filter handler used to return a spam result to pre_comment_approved
+	public static function last_comment_status( $approved, $comment ) {
+		// Only do this if it's the correct comment
+		if ( is_null(self::$last_comment_result) || ! self::matches_last_comment( $comment ) ) {
+			self::log( "comment_is_spam mismatched comment, returning unaltered $approved" );
+			return $approved;
+		}
+
+		// bump the counter here instead of when the filter is added to reduce the possibility of overcounting
+		if ( $incr = apply_filters('akismet_spam_count_incr', 1) )
+			update_option( 'akismet_spam_count', get_option('akismet_spam_count') + $incr );
+
+		return self::$last_comment_result;
+	}
+	
+	/**
+	 * If Akismet is temporarily unreachable, we don't want to "spam" the blogger with
+	 * moderation emails for comments that will be automatically cleared or spammed on
+	 * the next retry.
+	 *
+	 * For comments that will be rechecked later, empty the list of email addresses that
+	 * the moderation email would be sent to.
+	 *
+	 * @param array $emails An array of email addresses that the moderation email will be sent to.
+	 * @param int $comment_id The ID of the relevant comment.
+	 * @return array An array of email addresses that the moderation email will be sent to.
+	 */
+	public static function disable_moderation_emails_if_unreachable( $emails, $comment_id ) {
+		if ( ! empty( self::$prevent_moderation_email_for_these_comments ) && ! empty( $emails ) ) {
+			$comment = get_comment( $comment_id );
+
+			foreach ( self::$prevent_moderation_email_for_these_comments as $possible_match ) {
+				if ( self::comments_match( $possible_match, $comment ) ) {
+					update_comment_meta( $comment_id, 'akismet_delayed_moderation_email', true );
+					return array();
+				}
+			}
+		}
+
+		return $emails;
+	}
+
+	public static function _cmp_time( $a, $b ) {
+		return $a['time'] > $b['time'] ? -1 : 1;
+	}
+
+	public static function _get_microtime() {
+		$mtime = explode( ' ', microtime() );
+		return $mtime[1] + $mtime[0];
+	}
+
+	/**
+	 * Make a POST request to the Akismet API.
+	 *
+	 * @param string $request The body of the request.
+	 * @param string $path The path for the request.
+	 * @param string $ip The specific IP address to hit.
+	 * @return array A two-member array consisting of the headers and the response body, both empty in the case of a failure.
+	 */
+	public static function http_post( $request, $path, $ip=null ) {
+
+		$akismet_ua = sprintf( 'WordPress/%s | Akismet/%s', $GLOBALS['wp_version'], constant( 'AKISMET_VERSION' ) );
+		$akismet_ua = apply_filters( 'akismet_ua', $akismet_ua );
+
+		$content_length = strlen( $request );
+
+		$api_key   = self::get_api_key();
+		$host      = self::API_HOST;
+
+		if ( !empty( $api_key ) )
+			$host = $api_key.'.'.$host;
+
+		$http_host = $host;
+		// use a specific IP if provided
+		// needed by Akismet_Admin::check_server_connectivity()
+		if ( $ip && long2ip( ip2long( $ip ) ) ) {
+			$http_host = $ip;
+		}
+
+		$http_args = array(
+			'body' => $request,
+			'headers' => array(
+				'Content-Type' => 'application/x-www-form-urlencoded; charset=' . get_option( 'blog_charset' ),
+				'Host' => $host,
+				'User-Agent' => $akismet_ua,
+			),
+			'httpversion' => '1.0',
+			'timeout' => 15
+		);
+
+		$akismet_url = "http://{$http_host}/1.1/{$path}";
+		$response = wp_remote_post( $akismet_url, $http_args );
+		Akismet::log( compact( 'akismet_url', 'http_args', 'response' ) );
+		if ( is_wp_error( $response ) )
+			return array( '', '' );
+
+		return array( $response['headers'], $response['body'] );
+	}
+
+	// given a response from an API call like check_key_status(), update the alert code options if an alert is present.
+	private static function update_alert( $response ) {
+		$code = $msg = null;
+		if ( isset( $response[0]['x-akismet-alert-code'] ) ) {
+			$code = $response[0]['x-akismet-alert-code'];
+			$msg  = $response[0]['x-akismet-alert-msg'];
+		}
+
+		// only call update_option() if the value has changed
+		if ( $code != get_option( 'akismet_alert_code' ) ) {
+			if ( ! $code ) {
+				delete_option( 'akismet_alert_code' );
+				delete_option( 'akismet_alert_msg' );
+			}
+			else {
+				update_option( 'akismet_alert_code', $code );
+				update_option( 'akismet_alert_msg', $msg );
+			}
+		}
+	}
+
+	public static function load_form_js() {
+		wp_enqueue_script( 'akismet-form', AKISMET__PLUGIN_URL . '_inc/form.js', array( 'jquery' ), AKISMET_VERSION );
+		wp_print_scripts( 'akismet-form' );
+	}
+
+	public static function inject_ak_js( $fields ) {
+		echo '<p style="display: none;">';
+		echo '<input type="hidden" id="ak_js" name="ak_js" value="' . mt_rand( 0, 250 ) . '"/>';
+		echo '</p>';
+	}
+
+	private static function bail_on_activation( $message, $deactivate = true ) {
+?>
+<!doctype html>
+<html>
+<head>
+<meta charset="<?php bloginfo( 'charset' ); ?>">
+<style>
+* {
+	text-align: center;
+	margin: 0;
+	padding: 0;
+	font-family: "Lucida Grande",Verdana,Arial,"Bitstream Vera Sans",sans-serif;
+}
+p {
+	margin-top: 1em;
+	font-size: 18px;
+}
+</style>
+<body>
+<p><?php echo esc_html( $message ); ?></p>
+</body>
+</html>
+<?php
+		if ( $deactivate ) {
+			$plugins = get_option( 'active_plugins' );
+			$akismet = plugin_basename( AKISMET__PLUGIN_DIR . 'akismet.php' );
+			$update  = false;
+			foreach ( $plugins as $i => $plugin ) {
+				if ( $plugin === $akismet ) {
+					$plugins[$i] = false;
+					$update = true;
+				}
+			}
+
+			if ( $update ) {
+				update_option( 'active_plugins', array_filter( $plugins ) );
+			}
+		}
+		exit;
+	}
+
+	public static function view( $name, array $args = array() ) {
+		$args = apply_filters( 'akismet_view_arguments', $args, $name );
+		
+		foreach ( $args AS $key => $val ) {
+			$$key = $val;
+		}
+		
+		load_plugin_textdomain( 'akismet' );
+
+		$file = AKISMET__PLUGIN_DIR . 'views/'. $name . '.php';
+
+		include( $file );
+	}
+
+	/**
+	 * Attached to activate_{ plugin_basename( __FILES__ ) } by register_activation_hook()
+	 * @static
+	 */
+	public static function plugin_activation() {
+		if ( version_compare( $GLOBALS['wp_version'], AKISMET__MINIMUM_WP_VERSION, '<' ) ) {
+			load_plugin_textdomain( 'akismet' );
+			
+			$message = '<strong>'.sprintf(esc_html__( 'Akismet %s requires WordPress %s or higher.' , 'akismet'), AKISMET_VERSION, AKISMET__MINIMUM_WP_VERSION ).'</strong> '.sprintf(__('Please <a href="%1$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/');
+
+			Akismet::bail_on_activation( $message );
+		}
+	}
+
+	/**
+	 * Removes all connection options
+	 * @static
+	 */
+	public static function plugin_deactivation( ) {
+		//tidy up
+	}
+
+	public static function log( $akismet_debug ) {
+		if ( defined( 'WP_DEBUG_LOG' ) && WP_DEBUG_LOG )
+			error_log( print_r( compact( 'akismet_debug' ), 1 ) ); //send message to debug.log when in debug mode
+	}
+}
\ No newline at end of file