ResourceLoader Module for serving json based localization messages

ApiULSLocalization is still present since we have to provide live
language preview feature.

Moved the loading of json file to includes/JsonMessageLoader.php

Also moved all RL modules to includes folder.

Bug: 56509
Change-Id: Ic39dec1c484982fb07edd167e83794c0b5f470ee

includes/ResourceLoaderULSModule.php

@@ -0,0 +1,84 @@
+<?php
+/**
+ * Resource loader module for UniversalLanguageSelector
+ *
+ * Copyright (C) 2012 Alolita Sharma, Amir Aharoni, Arun Ganesh, Brandon Harris,
+ * Niklas Laxström, Pau Giner, Santhosh Thottingal, Siebrand Mazeland and other
+ * contributors. See CREDITS for a list.
+ *
+ * UniversalLanguageSelector is dual licensed GPLv2 or later and MIT. You don't
+ * have to do anything special to choose one license or the other and you don't
+ * have to notify anyone which license you are using. You are free to use
+ * UniversalLanguageSelector in commercial projects as long as the copyright
+ * header is left intact. See files GPL-LICENSE and MIT-LICENSE for details.
+ *
+ * @file
+ * @author Niklas Laxström
+ * @ingroup Extensions
+ * @licence GNU General Public Licence 2.0 or later
+ * @licence MIT License
+ */
+
+/**
+ * Resource loader module for providing MediaWiki language names.
+ */
+class ResourceLoaderULSModule extends ResourceLoaderModule {
+	/**
+	 * @var Language
+	 */
+	protected $language;
+	protected $targets = array( 'desktop', 'mobile' );
+
+	/**
+	 * Get all the dynamic data for the content language to an array
+	 *
+	 * @return array
+	 */
+	protected function getData() {
+		$vars = array();
+		$vars['wgULSLanguages'] = Language::fetchLanguageNames(
+			$this->language->getCode(), 'mwfile'
+		);
+
+		return $vars;
+	}
+
+	/**
+	 * @param $context ResourceLoaderContext
+	 * @return string: JavaScript code
+	 */
+	public function getScript( ResourceLoaderContext $context ) {
+		$this->language = Language::factory( $context->getLanguage() );
+		$out = '';
+		foreach ( $this->getData() as $key => $value ) {
+			$out .= Xml::encodeJsCall( 'mw.config.set', array( $key, $value ) );
+		}
+
+		return $out;
+	}
+
+	/**
+	 * @param $context ResourceLoaderContext
+	 * @return array|int|Mixed
+	 */
+	public function getModifiedTime( ResourceLoaderContext $context ) {
+		$this->language = Language::factory( $context->getLanguage() );
+		$cache = wfGetCache( CACHE_ANYTHING );
+		$key = wfMemcKey( 'resourceloader', 'ulsmodule', 'changeinfo' );
+
+		$data = $this->getData();
+		$hash = md5( serialize( $data ) );
+
+		$result = $cache->get( $key );
+		if ( is_array( $result ) && $result['hash'] === $hash ) {
+			return $result['timestamp'];
+		}
+		$timestamp = wfTimestamp();
+		$cache->set( $key, array(
+			'hash' => $hash,
+			'timestamp' => $timestamp,
+		) );
+
+		return $timestamp;
+	}
+}