<?php
namespace W3TC;

/**
 * W3 CDN Mirror Class
 */
class CdnEngine_Mirror extends CdnEngine_Base {
	/**
	 * PHP5 Constructor
	 *
	 * @param array   $config
	 */
	function __construct( $config = array() ) {
		$config = array_merge( array(
				'domain' => array(),
			), $config );

		parent::__construct( $config );
	}

	/**
	 * Uploads files stub
	 *
	 * @param array   $files
	 * @param array   $results
	 * @param boolean $force_rewrite
	 * @return boolean
	 */
	function upload( $files, &$results, $force_rewrite = false,
		$timeout_time = NULL ) {
		$results = $this->_get_results( $files, W3TC_CDN_RESULT_OK, 'OK' );

		return true;
	}

	/**
	 * Deletes files stub
	 *
	 * @param array   $files
	 * @param array   $results
	 * @return boolean
	 */
	function delete( $files, &$results ) {
		$results = $this->_get_results( $files, W3TC_CDN_RESULT_OK, 'OK' );

		return true;
	}

	/**
	 * Tests mirror
	 *
	 * @param string  $error
	 * @return bool
	 */
	function test( &$error ) {
		if ( !parent::test( $error ) ) {
			return false;
		}

		$results = array();
		$files = array(
			array(
				'local_path' => '',
				'remote_path' => 'purge_test_' . time()
			) );

		if ( !$this->purge( $files, $results ) && isset( $results[0]['error'] ) ) {
			$error = $results[0]['error'];

			return false;
		}

		return true;
	}

	/**
	 * Returns array of CDN domains
	 *
	 * @return array
	 */
	function get_domains() {
		if ( !empty( $this->_config['domain'] ) ) {
			return (array) $this->_config['domain'];
		}

		return array();
	}

	/**
	 * How and if headers should be set
	 *
	 * @return string W3TC_CDN_HEADER_NONE, W3TC_CDN_HEADER_UPLOADABLE, W3TC_CDN_HEADER_MIRRORING
	 */
	function headers_support() {
		return W3TC_CDN_HEADER_MIRRORING;
	}
}