From d9793c3e8d324c996acc730d776419030c37d5f3 Mon Sep 17 00:00:00 2001
From: matt <matt@1a063a9b-81f0-0310-95a4-ce76da25c4cd>
Date: Mon, 27 Aug 2007 06:34:18 +0000
Subject: [PATCH] Make the entire comment flood check pluggable as it can cause
 load problems on large sites.

git-svn-id: http://svn.automattic.com/wordpress/trunk@5947 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/comment.php         | 23 +++++++++++++----------
 wp-includes/default-filters.php |  1 +
 2 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/wp-includes/comment.php b/wp-includes/comment.php
index 7f36a45abe..37dc38a1b4 100644
--- a/wp-includes/comment.php
+++ b/wp-includes/comment.php
@@ -191,16 +191,7 @@ function wp_allow_comment($commentdata) {
 	if ( $wpdb->get_var($dupe) )
 		wp_die( __('Duplicate comment detected; it looks as though you\'ve already said that!') );
 
-	// Simple flood-protection
-	if ( $lasttime = $wpdb->get_var("SELECT comment_date_gmt FROM $wpdb->comments WHERE comment_author_IP = '$comment_author_IP' OR comment_author_email = '$comment_author_email' ORDER BY comment_date DESC LIMIT 1") ) {
-		$time_lastcomment = mysql2date('U', $lasttime);
-		$time_newcomment  = mysql2date('U', $comment_date_gmt);
-		$flood_die = apply_filters('comment_flood_filter', false, $time_lastcomment, $time_newcomment);
-		if ( $flood_die ) {
-			do_action('comment_flood_trigger', $time_lastcomment, $time_newcomment);
-			wp_die( __('You are posting comments too quickly.  Slow down.') );
-		}
-	}
+	do_action( 'check_comment_flood', $comment_author_IP, $comment_author_email, $comment_date_gmt );
 
 	if ( $user_id ) {
 		$userdata = get_userdata($user_id);
@@ -225,6 +216,18 @@ function wp_allow_comment($commentdata) {
 	return $approved;
 }
 
+function check_comment_flood_db( $ip, $email, $date ) {
+	global $wpdb;
+	if ( $lasttime = $wpdb->get_var("SELECT comment_date_gmt FROM $wpdb->comments WHERE comment_author_IP = '$ip' OR comment_author_email = '$email' ORDER BY comment_date DESC LIMIT 1") ) {
+		$time_lastcomment = mysql2date('U', $lasttime);
+		$time_newcomment  = mysql2date('U', $date);
+		$flood_die = apply_filters('comment_flood_filter', false, $time_lastcomment, $time_newcomment);
+		if ( $flood_die ) {
+			do_action('comment_flood_trigger', $time_lastcomment, $time_newcomment);
+			wp_die( __('You are posting comments too quickly.  Slow down.') );
+		}
+	}
+}
 
 function wp_blacklist_check($author, $email, $url, $comment, $user_ip, $user_agent) {
 	global $wpdb;
diff --git a/wp-includes/default-filters.php b/wp-includes/default-filters.php
index ddc653f5ed..39911e96f3 100644
--- a/wp-includes/default-filters.php
+++ b/wp-includes/default-filters.php
@@ -106,6 +106,7 @@ add_filter('mce_plugins', '_mce_load_rtl_plugin');
 add_filter('mce_buttons', '_mce_add_direction_buttons');
 add_filter('pre_kses', 'wp_pre_kses_less_than');
 add_filter('sanitize_title', 'sanitize_title_with_dashes');
+add_action('check_comment_flood', 'check_comment_flood_db', 10, 3);
 add_filter('comment_flood_filter', 'wp_throttle_comment_flood', 10, 3);
 add_filter('pre_comment_content', 'wp_rel_nofollow', 15);
 add_filter('comment_email', 'antispambot');