<?php
/**
 * The server API endpoint deals with requests for downloading po and mo files, 
 * depending on language, plugin or theme name and version. The server endpoint 
 * could also manage simple and batch requests, which are defined by plugin 
 * functions and protocol. The server sends po and mo file only if this version 
 * of plugin or theme is fully translated, unless sends the message that plugin 
 * is not translated. If some plugin ot theme is not translated, user can request 
 * translation via the plugin options page.
 */

/**
 * Function which validates input array
 *
 * @package lp-update
 *
 * @param array $array input array
 * @return bool valid or not
 */
function validate_array( &$array ) {
	$valid = true;
	$to_unset = array();
	foreach ( $array as $key => $record ) {
		$valid_record = true;
		$valid = $valid && ( isset( $record['type'] ) );
		$valid_record = $valid_record && ( isset( $record['type'] ) );
		$valid = $valid && ( isset( $record['slug'] ) );
		$valid_record = $valid_record && ( isset( $record['slug'] ) );
		$valid = $valid && ( isset( $record['version'] ) );
		$valid_record = $valid_record && ( isset( $record['version'] ) );
		$valid = $valid && ( isset( $record['locale'] ) );
		$valid_record = $valid_record && ( isset( $record['locale'] ) );
		if ( ! $valid_record ) {
			array_push( $to_unset, $key );
		}
	}
	if ( ! $valid ) {
		foreach ( $to_unset as $key ) {
			unset( $array[$key] );
		}
	}
	return $valid;
}

/**
 * Function which prepares output result
 *
 * @package lp-update
 *
 * @param string $method HTTP method
 * @param string $type plugin, theme or core
 * @param string $slug slug of plugin or theme
 * @param string $version plugin, theme or core version
 * @param int $revision revision of translation
 * @param string $locale locale of this translation
 * @return object or string result for one entry
 */
function output_result( $method, $type, $slug, $version, $revision, $locale ) {
	global $revisions_cache;
	if ( NULL == $revision ) {
		$revision = 0;
	}

	if ( $type == 'core' || $type == 'plugin' || $type == 'theme' ) {
		$new_revision = $revisions_cache->get_revision( $type, $slug, $version, $locale );
	}
	
	if ( $new_revision['revision'] > $revision && 'GET' == $method ) {
		$result = "Type: $type\n";
		$result .= "Name: {$new_revision['name']}\n";
		$result .= "Slug: $slug\n";
		$result .= "Textdomain: {$new_revision['textdomain']}\n";
		$result .= "Version: $version\n";
		$result .= "New Revision: {$new_revision['revision']}\n";
		$result .= "Locale: $locale\n";
		$result .= "Translated Percent: {$new_revision['percent']}\n";
		if ( $new_revision != NULL ) {
			$result .= 'URL: http://translate.wordpress.org/projects/wp-' . $type . 's/' . $new_revision['textdomain'] . '/dev/' . $locale . '/default' . "\n";
			$result .= PATH_TO_TRANSLATIONS . '/' . $type . 's/wp-' . $type . 's-' . $new_revision['textdomain'] . '-dev-' . $locale . '-' . $version . '-' . $new_revision['revision'] . '.zip' . "\n";
			$result .= $new_revision['percent'];
		} else {
			$result .= "The translation for this plugin/theme does not exist.\n";
		}
		echo "\n\n";
		return $result;
	} else if ( $new_revision['revision'] > $revision && 'POST' == $method ) {
		$result['type'] = $type;
		$result['name'] = $new_revision['name'];
		$result['slug'] = $slug;
		$result['textdomain'] = $new_revision['textdomain'];
		$result['version'] = $version;
		$result['new_revision'] = $new_revision['revision'];
		$result['locale'] = $locale;
		$result['percent'] = $new_revision['percent'];
		if ( $new_revision != NULL ) {
			$result['url'] = 'http://translate.wordpress.org/projects/wp-' . $type . 's/' . $result['textdomain'] . '/dev/' . $locale . '/default';
			$result['package'] = PATH_TO_TRANSLATIONS . '/' . $type . 's/wp-' . $type . 's-' . $new_revision['textdomain'] . '-dev-' . $locale . '-' . $version . '-' . $new_revision['revision'] . '.zip';
		} else {
			$result['url'] = NULL;
			$result['package'] = NULL;
		}
		return (object) $result;
	} else {
		return NULL;
	}
}

require_once ( dirname( __FILE__ ) . '/config.php' );

require_once ( dirname( __FILE__ ) . '/revisions-cache.php' );

$batch = isset( $_REQUEST['batch'] ) ? $_REQUEST['batch'] : NULL;

if ( isset( $batch ) ) {
	if ( 1 == $batch ) {
		$array = isset( $_POST['array'] ) ? $_POST['array'] : NULL;
		$array = unserialize( $array );
		$array = (array) $array;
		$valid = validate_array( $array );
		if ( $valid ) {
			$output = array();
			foreach ( $array as $record ) {
				if ( ! isset( $record['revision'] ) )
					$record['revision'] = NULL;
				$result = output_result( 'POST', $record['type'], $record['slug'], $record['version'], $record['revision'], $record['locale'] );
				if ( NULL !== $result ) {
					$output[$record['slug']] = $result;
				}
			}
		} else {
			$output = 'fail';
		}
		echo serialize( $output );
	} else {
		if ( 'POST' == $_SERVER['REQUEST_METHOD'] ) {
			$array = isset( $_POST['array'] ) ? $_POST['array'] : NULL;
			$array = unserialize( $array );
			$array = (array) $array;
			$type = isset( $array[0]['type'] ) ? $array[0]['type'] : NULL;
			$slug = isset( $array[0]['slug'] ) ? $array[0]['slug'] : NULL;
			$version = isset( $array[0]['version'] ) ? $array[0]['version'] : NULL;
			$revision = isset( $array[0]['revision'] ) ? $array[0]['revision'] : NULL;
			$locale = isset( $array[0]['locale'] ) ? $array[0]['locale'] : NULL;
			$result = output_result( 'POST', $type, $slug, $version, $revision, $locale );
			if ( NULL !== $result ) {
				echo serialize( $result );
			} else {
				echo serialize ( 'fail' );
			}
		} elseif ( 'GET' == $_SERVER['REQUEST_METHOD'] ) {
			$type = isset( $_REQUEST['type'] ) ? $_REQUEST['type'] : NULL;
			$slug = isset( $_REQUEST['slug'] ) ? $_REQUEST['slug'] : NULL;
			$version = isset( $_REQUEST['version'] ) ? $_REQUEST['version'] : NULL;
			$revision = isset( $_REQUEST['revision'] ) ? $_REQUEST['revision'] : NULL;
			$locale = isset( $_REQUEST['locale'] ) ? $_REQUEST['locale'] : NULL;
			echo output_result( 'GET', $type, $slug, $version, $revision, $locale );
		}
	}
} else {
	$type = isset( $_REQUEST['type'] ) ? $_REQUEST['type'] : NULL;
	$slug = isset( $_REQUEST['slug'] ) ? $_REQUEST['slug'] : NULL;
	$version = isset( $_REQUEST['version'] ) ? $_REQUEST['version'] : NULL;
	$revision = isset( $_REQUEST['revision'] ) ? $_REQUEST['revision'] : NULL;
	$locale = isset( $_REQUEST['locale'] ) ? $_REQUEST['locale'] : NULL;
	echo output_result( 'GET', $type, $slug, $version, $revision, $locale );
}

?>