<?php
/**
 * Resource loader module for populating language specific data.
 *
 * 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
 * @author Santhosh Thottingal
 * @author Timo Tijhof
 */

/**
 * ResourceLoader module for populating language specific data.
 */
class ResourceLoaderLanguageDataModule extends ResourceLoaderModule {

	/**
	 * Get the grammer forms for the site content language.
	 *
	 * @return array
	 */
	protected function getSiteLangGrammarForms() {
		global $wgContLang;
		return $wgContLang->getGrammarForms();
	}

	/**
	 * @param $context ResourceLoaderContext
	 * @return string: Javascript code
	 */
	public function getScript( ResourceLoaderContext $context ) {
		global $wgContLang;

		return Xml::encodeJsCall( 'mw.language.setData', array(
			$wgContLang->getCode(),
			array(
				'grammarForms' => $this->getSiteLangGrammarForms()
			)
		) );
	}

	/**
	 * @param $context ResourceLoaderContext
	 * @return array|int|Mixed
	 */
	public function getModifiedTime( ResourceLoaderContext $context ) {
		$cache = wfGetCache( CACHE_ANYTHING );
		$key = wfMemcKey( 'resourceloader', 'langdatamodule', 'changeinfo' );

		$forms = $this->getSiteLangGrammarForms();
		$hash = md5( serialize( $forms ) );

		$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;
	}

	/**
	 * @return array
	 */
	public function getDependencies() {
		return array( 'mediawiki.language.init' );
	}
}