Add ! syntax (NOT) to filters. Don't throttle duplicate post bodies when they are empty

inc/config.php

@@ -305,7 +305,7 @@
 	$config['filters'][] = array(
 		'condition' => array(
 			'flood-match' => array('ip'), // Only match IP address
-			'flood-time' => &$config['flood_time'] // 10 seconds minimum
+			'flood-time' => &$config['flood_time']
 		),
 		'action' => 'reject',
 		'message' => &$config['error']['flood']
@@ -315,7 +315,8 @@
 	$config['filters'][] = array(
 		'condition' => array(
 			'flood-match' => array('ip', 'body'), // Match IP address and post body
-			'flood-time' => &$config['flood_time_ip'] // 2 minutes minimum
+			'flood-time' => &$config['flood_time_ip'],
+			'!body' => '/^$/', // Post body is NOT empty
 		),
 		'action' => 'reject',
 		'message' => &$config['error']['flood']
@@ -325,7 +326,7 @@
 	$config['filters'][] = array(
 		'condition' => array(
 			'flood-match' => array('body'), // Match IP address and post body
-			'flood-time' => &$config['flood_time_same'] // 30 seconds minimum
+			'flood-time' => &$config['flood_time_same']
 		),
 		'action' => 'reject',
 		'message' => &$config['error']['flood']

inc/filters.php

@@ -168,11 +168,14 @@ class Filter {
 	
 	public function check(array $post) {
 		foreach ($this->condition as $condition => $value) {
-			if (!$this->match($post, $condition, $value))
+			if ($condition[0] == '!') {
+				$NOT = true;
+				$condition = substr($condition, 1);
+			} else $NOT = false;
+			
+			if ($this->match($post, $condition, $value) == $NOT)
 				return false;
 		}
-		
-		/* match */
 		return true;
 	}
 }