From 708c02281e6e8880ae2cebbda7f353ce97841f94 Mon Sep 17 00:00:00 2001
From: Amir Sarabadani <Ladsgroup@gmail.com>
Date: Sun, 31 Jul 2016 19:06:49 +0430
Subject: [PATCH] Add CollationFa

Bug: T139110
Change-Id: Ie15a2ee1c22ff4a1d2b721ed137227fe83dd12ea
---
 autoload.php                       |  1 +
 includes/collation/Collation.php   |  2 ++
 includes/collation/CollationFa.php | 44 ++++++++++++++++++++++++++++++
 3 files changed, 47 insertions(+)
 create mode 100644 includes/collation/CollationFa.php

diff --git a/autoload.php b/autoload.php
index 5808040e41..f8b6f231fc 100644
--- a/autoload.php
+++ b/autoload.php
@@ -257,6 +257,7 @@ $wgAutoloadLocalClasses = [
 	'Collation' => __DIR__ . '/includes/collation/Collation.php',
 	'CollationCkb' => __DIR__ . '/includes/collation/CollationCkb.php',
 	'CollationEt' => __DIR__ . '/includes/collation/CollationEt.php',
+	'CollationFa' => __DIR__ . '/includes/collation/CollationFa.php',
 	'CommandLineInc' => __DIR__ . '/maintenance/commandLine.inc',
 	'CommandLineInstaller' => __DIR__ . '/maintenance/install.php',
 	'CompareParserCache' => __DIR__ . '/maintenance/compareParserCache.php',
diff --git a/includes/collation/Collation.php b/includes/collation/Collation.php
index fe254afdc5..0e0ee2f698 100644
--- a/includes/collation/Collation.php
+++ b/includes/collation/Collation.php
@@ -59,6 +59,8 @@ abstract class Collation {
 				return new CollationCkb;
 			case 'xx-uca-et':
 				return new CollationEt;
+			case 'xx-uca-fa':
+				return new CollationFa;
 			default:
 				$match = [];
 				if ( preg_match( '/^uca-([a-z@=-]+)$/', $collationName, $match ) ) {
diff --git a/includes/collation/CollationFa.php b/includes/collation/CollationFa.php
new file mode 100644
index 0000000000..b7e45cc1d6
--- /dev/null
+++ b/includes/collation/CollationFa.php
@@ -0,0 +1,44 @@
+<?php
+/**
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+/**
+ * Temporary workaround for incorrect collation of Persian language ('fa') in ICU (bug T139110).
+ *
+ * 'ا' and 'و' should not be considered the same letter for the purposes of collation in Persian.
+ *
+ * @since 1.29
+ */
+class CollationFa extends IcuCollation {
+	private $tertiaryCollator;
+
+	public function __construct() {
+		parent::__construct( 'fa' );
+		$this->tertiaryCollator = Collator::create( 'fa' );
+	}
+
+	public function getPrimarySortKey( $string ) {
+		$firstLetter = mb_substr( $string, 0, 1 );
+		if ( $firstLetter === 'و' || $firstLetter === 'ا' ) {
+			return $this->tertiaryCollator->getSortKey( $string );
+		}
+
+		return parent::getPrimarySortKey( $string );
+	}
+}
-- 
2.20.1