From a3a896a127b90548d404d347f3665a7e6ac90f40 Mon Sep 17 00:00:00 2001
From: Andrew Dolgov <fox@madoka.volgo-balt.ru>
Date: Mon, 25 Mar 2013 19:46:43 +0400
Subject: let us rejoice on being able to create double negative filters (refs
 #631)

---
 include/functions.php | 18 +++++++++++++-----
 include/rssfuncs.php  |  6 ++++++
 2 files changed, 19 insertions(+), 5 deletions(-)

(limited to 'include')

diff --git a/include/functions.php b/include/functions.php
index b52531f66..9a855a9bc 100644
--- a/include/functions.php
+++ b/include/functions.php
@@ -1,6 +1,6 @@
 <?php
 	define('EXPECTED_CONFIG_VERSION', 26);
-	define('SCHEMA_VERSION', 106);
+	define('SCHEMA_VERSION', 107);
 
 	$fetch_last_error = false;
 	$pluginhost = false;
@@ -3214,7 +3214,7 @@
 			$filter_id = $line["id"];
 
 			$result2 = db_query($link, "SELECT
-				r.reg_exp, r.feed_id, r.cat_id, r.cat_filter, t.name AS type_name
+				r.reg_exp, r.inverse, r.feed_id, r.cat_id, r.cat_filter, t.name AS type_name
 				FROM ttrss_filters2_rules AS r,
 				ttrss_filter_types AS t
 				WHERE
@@ -3231,6 +3231,7 @@
 				$rule = array();
 				$rule["reg_exp"] = $rule_line["reg_exp"];
 				$rule["type"] = $rule_line["type_name"];
+				$rule["inverse"] = sql_bool_to_bool($rule_line["inverse"]);
 
 				array_push($rules, $rule);
 			}
@@ -3254,6 +3255,7 @@
 
 			$filter = array();
 			$filter["match_any_rule"] = sql_bool_to_bool($line["match_any_rule"]);
+			$filter["inverse"] = sql_bool_to_bool($line["inverse"]);
 			$filter["rules"] = $rules;
 			$filter["actions"] = $actions;
 
@@ -3875,7 +3877,7 @@
 
 				$rule['reg_exp'] = db_escape_string($link, $rule['reg_exp']);
 
-				switch ($rule["type"]) {
+					switch ($rule["type"]) {
 					case "title":
 						$qpart = "LOWER(ttrss_entries.title) $reg_qpart LOWER('".
 							$rule['reg_exp'] . "')";
@@ -3923,16 +3925,22 @@
 					$qpart .= " AND $cat_qpart";
 				}
 
+				if (isset($rule['inverse'])) $qpart = "NOT ($qpart)";
+
 				array_push($query, "($qpart)");
 
 			}
 		}
 
 		if (count($query) > 0) {
-			return "(" . join($filter["match_any_rule"] ? "OR" : "AND", $query) . ")";
+			$fullquery = "(" . join($filter["match_any_rule"] ? "OR" : "AND", $query) . ")";
 		} else {
-			return "(false)";
+			$fullquery = "(false)";
 		}
+
+		if ($filter['inverse']) $fullquery = "(NOT $fullquery)";
+
+		return $fullquery;
 	}
 
 	if (!function_exists('gzdecode')) {
diff --git a/include/rssfuncs.php b/include/rssfuncs.php
index 92bfaa023..11aa0e4ba 100644
--- a/include/rssfuncs.php
+++ b/include/rssfuncs.php
@@ -1165,11 +1165,13 @@
 
 		foreach ($filters as $filter) {
 			$match_any_rule = $filter["match_any_rule"];
+			$inverse = $filter["inverse"];
 			$filter_match = false;
 
 			foreach ($filter["rules"] as $rule) {
 				$match = false;
 				$reg_exp = $rule["reg_exp"];
+				$rule_inverse = $rule["inverse"];
 
 				if (!$reg_exp)
 					continue;
@@ -1202,6 +1204,8 @@
 					break;
 				}
 
+				if ($rule_inverse) $match = !$match;
+
 				if ($match_any_rule) {
 					if ($match) {
 						$filter_match = true;
@@ -1215,6 +1219,8 @@
 				}
 			}
 
+			if ($inverse) $filter_match = !$filter_match;
+
 			if ($filter_match) {
 				foreach ($filter["actions"] AS $action) {
 					array_push($matches, $action);
-- 
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