From 60e680599d200134db6f8e07f797d099e330c8a2 Mon Sep 17 00:00:00 2001
From: Andrew Dolgov <noreply@madoka.volgo-balt.ru>
Date: Tue, 4 Aug 2015 13:53:48 +0300
Subject: [PATCH] allow selecting stemming language in search dialog

---
 classes/feeds.php      |  8 ++++++++
 include/functions2.php | 12 +++++++++---
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/classes/feeds.php b/classes/feeds.php
index 996b1b23f..ced6bbb4a 100644
--- a/classes/feeds.php
+++ b/classes/feeds.php
@@ -202,6 +202,7 @@ class Feeds extends Handler_Protected {
 		}
 
 		@$search = $this->dbh->escape_string($_REQUEST["query"]);
+		@$search_language = $this->dbh->escape_string($_REQUEST["search_language"]); // PGSQL only
 
 		if ($search) {
 			$disable_cache = true;
@@ -247,6 +248,7 @@ class Feeds extends Handler_Protected {
 				"view_mode" => $view_mode,
 				"cat_view" => $cat_view,
 				"search" => $search,
+				"search_language" => $search_language,
 				"override_order" => $override_order,
 				"offset" => $offset,
 				"include_children" => $include_children,
@@ -1143,6 +1145,12 @@ class Feeds extends Handler_Protected {
 
 		print "<hr/><span style='float : right'>".T_sprintf('in %s', getFeedTitle($active_feed_id, $is_cat))."</span>";
 
+		if (DB_TYPE == "pgsql") {
+			print "<hr/>";
+			print_select("search_language", "", Pref_Feeds::$feed_languages,
+				"dojoType='dijit.form.Select' title=\"".__('Used for word stemming')."\"");
+		}
+
 		print "</div>";
 
 		print "<div class=\"dlgButtons\">";
diff --git a/include/functions2.php b/include/functions2.php
index 551d55d73..9e4f0b0e0 100644
--- a/include/functions2.php
+++ b/include/functions2.php
@@ -280,13 +280,18 @@
 		return $data;
 	}
 
-	function search_to_sql($search) {
+	function search_to_sql($search, $search_language) {
 
 		$keywords = str_getcsv($search, " ");
 		$query_keywords = array();
 		$search_words = array();
 		$search_query_leftover = array();
 
+		if ($search_language)
+			$search_language = db_escape_string(mb_strtolower($search_language));
+		else
+			$search_language = "english";
+
 		foreach ($keywords as $k) {
 			if (strpos($k, "-") === 0) {
 				$k = substr($k, 1);
@@ -402,7 +407,7 @@
 
 			if (DB_TYPE == "pgsql") {
 				array_push($query_keywords,
-					"(tsvector_combined @@ to_tsquery('english', '$search_query_leftover'))");
+					"(tsvector_combined @@ to_tsquery('$search_language', '$search_query_leftover'))");
 			}
 
 		}
@@ -447,6 +452,7 @@
 		$view_mode = $params["view_mode"];
 		$cat_view = isset($params["cat_view"]) ? $params["cat_view"] : false;
 		$search = isset($params["search"]) ? $params["search"] : false;
+		$search_language = isset($params["search_language"]) ? $params["search_language"] : "";
 		$override_order = isset($params["override_order"]) ? $params["override_order"] : false;
 		$offset = isset($params["offset"]) ? $params["offset"] : 0;
 		$owner_uid = isset($params["owner_uid"]) ? $params["owner_uid"] : $_SESSION["uid"];
@@ -471,7 +477,7 @@
 
 				// fall back in case of no plugins
 				if (!$search_query_part) {
-					list($search_query_part, $search_words) = search_to_sql($search);
+					list($search_query_part, $search_words) = search_to_sql($search, $search_language);
 				}
 				$search_query_part .= " AND ";
 			} else {