<?php

/**

 * WPBakery Visual Composer updater

 *

 * @package WPBakeryVisualComposer

 *

 */



/**

 * Vc updating manager.

 */

class Vc_Updater {

	/**

	 * @var string

	 */

	protected $version_url = 'http://wpbakery.com/version/?';

	/**

	 * @var string

	 */

	public $title = 'WPBakery Visual Composer';



	/**

	 * @var bool

	 */

	protected $auto_updater = false;

	/**

	 * @var bool

	 */

	protected $upgrade_manager = false;

	/**

	 * @var bool

	 */

	protected $iframe = false;



	/**

	 *

	 */

	public function init() {

		add_filter( 'upgrader_pre_download', array( $this, 'upgradeFilterFromEnvato' ), 10, 4 );

		add_action( 'upgrader_process_complete', array( $this, 'removeTemporaryDir' ) );

	}



	/**

	 * Setter for manager updater.

	 *

	 * @param Vc_Updating_Manager $updater

	 */

	public function setUpdateManager( Vc_Updating_Manager $updater ) {

		$this->auto_updater = $updater;

	}



	/**

	 * Getter for manager updater.

	 *

	 * @return Vc_Updating_Manager

	 */

	public function updateManager() {

		return $this->auto_updater;

	}



	/**

	 * Get url for version validation

	 * @return string

	 */

	public function versionUrl() {

		return $this->version_url . time();

	}



	/**

	 * Downloads new VC from Envato marketplace and unzips into temporary directory.

	 *

	 * @param $reply

	 * @param $package

	 * @param $updater

	 *

	 * @return mixed|string|WP_Error

	 */

	public function upgradeFilterFromEnvato( $reply, $package, $updater ) {

		global $wp_filesystem;



		if ( ( isset( $updater->skin->plugin ) && $updater->skin->plugin === vc_plugin_name() ) ||

		     ( isset( $updater->skin->plugin_info ) && $updater->skin->plugin_info['Name'] === $this->title )

		) {

			$updater->strings['download_envato'] = __( 'Downloading package from envato market...', 'js_composer' );

			$updater->skin->feedback( 'download_envato' );

			$package_filename = 'js_composer.zip';

			$res = $updater->fs_connect( array( WP_CONTENT_DIR ) );

			if ( ! $res ) {

				return new WP_Error( 'no_credentials', __( "Error! Can't connect to filesystem", 'js_composer' ) );

			}

			$username = vc_settings()->get( 'envato_username' );

			$api_key = vc_settings()->get( 'envato_api_key' );

			$purchase_code = vc_settings()->get( 'js_composer_purchase_code' );

			if ( ! vc_license()->isActivated() || empty( $username ) || empty( $api_key ) || empty( $purchase_code ) ) {

				return new WP_Error( 'no_credentials', __( 'To receive automatic updates license activation is required. Please visit <a href="' . admin_url( 'options-general.php?page=vc_settings&tab=updater' ) . '' . '" target="_blank">Settings</a> to activate your Visual Composer.', 'js_composer' ) );

			}

			$json = wp_remote_get( $this->envatoDownloadPurchaseUrl( $username, $api_key, $purchase_code ) );

			$result = json_decode( $json['body'], true );

			if ( ! isset( $result['download-purchase']['download_url'] ) ) {

				return new WP_Error( 'no_credentials', __( 'Error! Envato API error' . ( isset( $result['error'] ) ? ': ' . $result['error'] : '.' ), 'js_composer' ) );

			}

			$result['download-purchase']['download_url'];

			$download_file = download_url( $result['download-purchase']['download_url'] );

			if ( is_wp_error( $download_file ) ) {

				return $download_file;

			}

			$upgrade_folder = $wp_filesystem->wp_content_dir() . 'uploads/js_composer_envato_package';

			if ( is_dir( $upgrade_folder ) ) {

				$wp_filesystem->delete( $upgrade_folder );

			}

			$result = unzip_file( $download_file, $upgrade_folder );

			if ( $result && is_file( $upgrade_folder . '/' . $package_filename ) ) {

				return $upgrade_folder . '/' . $package_filename;

			}



			return new WP_Error( 'no_credentials', __( 'Error on unzipping package', 'js_composer' ) );

		}



		return $reply;

	}



	/**

	 *

	 */

	public function removeTemporaryDir() {

		global $wp_filesystem;

		if ( is_dir( $wp_filesystem->wp_content_dir() . 'uploads/js_composer_envato_package' ) ) {

			$wp_filesystem->delete( $wp_filesystem->wp_content_dir() . 'uploads/js_composer_envato_package', true );

		}

	}



	/**

	 * @param $username

	 * @param $api_key

	 * @param $purchase_code

	 *

	 * @return string

	 */

	protected function envatoDownloadPurchaseUrl( $username, $api_key, $purchase_code ) {

		return 'http://marketplace.envato.com/api/edge/' . rawurlencode( $username ) . '/' . rawurlencode( $api_key ) . '/download-purchase:' . rawurlencode( $purchase_code ) . '.json';

	}

}