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<?php
/**
 *
 *
 * Created on Sep 19, 2006
 *
 * Copyright © 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
 *
 * 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
 */

if ( !defined( 'MEDIAWIKI' ) ) {
	// Eclipse helper - will be ignored in production
	require_once( 'ApiFormatBase.php' );
}

/**
 * API JSON output formatter
 * @ingroup API
 */
class ApiFormatJson extends ApiFormatBase {

	private $mIsRaw;

	public function __construct( $main, $format ) {
		parent::__construct( $main, $format );
		$this->mIsRaw = ( $format === 'rawfm' );
	}

	public function getMimeType() {
		$params = $this->extractRequestParams();
		// callback:
		if ( $params['callback'] ) {
			return 'text/javascript';
		}
		return 'application/json';
	}

	public function getNeedsRawData() {
		return $this->mIsRaw;
	}

	public function getWantsHelp() {
		// Help is always ugly in JSON
		return false;
	}

	public function execute() {
		$prefix = $suffix = '';

		$params = $this->extractRequestParams();
		$callback = $params['callback'];
		if ( !is_null( $callback ) ) {
			$prefix = preg_replace( "/[^][.\\'\\\"_A-Za-z0-9]/", '', $callback ) . '(';
			$suffix = ')';
		}
		$this->printText(
			$prefix .
			FormatJson::encode( $this->getResultData(), $this->getIsHtml() ) .
			$suffix
		);
	}

	public function getAllowedParams() {
		return array(
			'callback'  => null,
		);
	}

	public function getParamDescription() {
		return array(
			'callback' => 'If specified, wraps the output into a given function call. For safety, all user-specific data will be restricted.',
		);
	}

	public function getDescription() {
		if ( $this->mIsRaw ) {
			return 'Output data with the debuging elements in JSON format' . parent::getDescription();
		} else {
			return 'Output data in JSON format' . parent::getDescription();
		}
	}

	public function getVersion() {
		return __CLASS__ . ': $Id: ApiFormatJson.php 78829 2010-12-22 20:52:06Z reedy $';
	}
}