<?php

/**

 * Upgrade API: Theme_Upgrader class

 *

 * @package WordPress

 * @subpackage Upgrader

 * @since 4.6.0

 */

/**

 * Core class used for upgrading/installing themes.

 *

 * It is designed to upgrade/install themes from a local zip, remote zip URL,

 * or uploaded zip file.

 *

 * @since 2.8.0

 * @since 4.6.0 Moved to its own file from wp-admin/includes/class-wp-upgrader.php.

 *

 * @see WP_Upgrader

 */

class Theme_Upgrader extends WP_Upgrader {

	/**

	 * Result of the theme upgrade offer.

	 *

	 * @since 2.8.0

	 * @var array|WP_Error $result

	 * @see WP_Upgrader::$result

	 */

	public $result;

	/**

	 * Whether multiple themes are being upgraded/installed in bulk.

	 *

	 * @since 2.9.0

	 * @var bool $bulk

	 */

	public $bulk = false;

	/**

	 * Initialize the upgrade strings.

	 *

	 * @since 2.8.0

	 */

	public function upgrade_strings() {

		/* translators: %s: package URL */

		$this->strings['downloading_package'] = sprintf( __( 'Downloading update from %s&#8230;' ), '<span class="code">%s</span>' );

	}

	/**

	 * Initialize the installation strings.

	 *

	 * @since 2.8.0

	 */

	public function install_strings() {

		/* translators: %s: package URL */

		$this->strings['downloading_package'] = sprintf( __( 'Downloading installation package from %s&#8230;' ), '<span class="code">%s</span>' );

		/* translators: 1: theme name, 2: version */

		/* translators: 1: theme name, 2: version */

		/* translators: 1: theme name, 2: version */

		/* translators: 1: theme name, 2: version */

		/* translators: %s: theme name */

		$this->strings['parent_theme_not_found'] = sprintf( __( '<strong>The parent theme could not be found.</strong> You will need to install the parent theme, %s, before you can use this child theme.' ), '<strong>%s</strong>' );

	}

	/**

	 * Check if a child theme is being installed and we need to install its parent.

	 *

	 * Hooked to the {@see 'upgrader_post_install'} filter by Theme_Upgrader::install().

	 *

	 * @since 3.4.0

	 *

	 * @param bool  $install_result

	 * @param array $hook_extra

	 * @param array $child_result

	 * @return type

	 */

	public function check_parent_theme_filter( $install_result, $hook_extra, $child_result ) {

		// Check to see if we need to install a parent theme

		$theme_info = $this->theme_info();

			return $install_result;

		$this->skin->feedback( 'parent_theme_search' );

		if ( ! $theme_info->parent()->errors() ) {

			// We already have the theme, fall through.

			return $install_result;

		}

		// We don't have the parent theme, let's install it.

			// Don't show activate or preview actions after installation

			return $install_result;

		}

		// Backup required data we're going to override:

		$child_success_message = $this->strings['process_success'];

		// Override them

		$this->strings['process_success_specific'] = $this->strings['parent_theme_install_success'];//, $api->name, $api->version);

		// Install the parent theme

		// Start cleaning up after the parents installation

		// Reset child's result and data

		$this->strings['process_success'] = $child_success_message;

		return $install_result;

	}

	/**

	 * Don't display the activate and preview actions to the user.

	 *

	 * Hooked to the {@see 'install_theme_complete_actions'} filter by

	 * Theme_Upgrader::check_parent_theme_filter() when installing

	 * a child theme and installing the parent theme fails.

	 *

	 * @since 3.4.0

	 *

	 * @param array $actions Preview actions.

	 * @return array

	 */

	public function hide_activate_preview_actions( $actions ) {

		return $actions;

	}

	/**

	 * Install a theme package.

	 *

	 * @since 2.8.0

	 * @since 3.7.0 The `$args` parameter was added, making clearing the update cache optional.

	 *

	 * @param string $package The full local path or URI of the package.

	 * @param array  $args {

	 *     Optional. Other arguments for installing a theme package. Default empty array.

	 *

	 *     @type bool $clear_update_cache Whether to clear the updates cache if successful.

	 *                                    Default true.

	 * }

	 *

	 * @return bool|WP_Error True if the installation was successful, false or a WP_Error object otherwise.

	 */

	public function install( $package, $args = array() ) {

			'clear_update_cache' => true,

		);

		$parsed_args = wp_parse_args( $args, $defaults );

		$this->init();

		$this->install_strings();

		if ( $parsed_args['clear_update_cache'] ) {

			// Clear cache so wp_update_themes() knows about the new theme.

			add_action( 'upgrader_process_complete', 'wp_clean_themes_cache', 9, 0 );

		}

		remove_action( 'upgrader_process_complete', 'wp_clean_themes_cache', 9 );

			return $this->result;

		// Refresh the Theme Update information

		wp_clean_themes_cache( $parsed_args['clear_update_cache'] );

		return true;

	}

	/**

	 * Upgrade a theme.

	 *

	 * @since 2.8.0

	 * @since 3.7.0 The `$args` parameter was added, making clearing the update cache optional.

	 *

	 * @param string $theme The theme slug.

	 * @param array  $args {

	 *     Optional. Other arguments for upgrading a theme. Default empty array.

	 *

	 *     @type bool $clear_update_cache Whether to clear the update cache if successful.

	 *                                    Default true.

	 * }

	 * @return bool|WP_Error True if the upgrade was successful, false or a WP_Error object otherwise.

	 */

	public function upgrade( $theme, $args = array() ) {

			'clear_update_cache' => true,

		);

		$parsed_args = wp_parse_args( $args, $defaults );

		$this->init();

		$this->upgrade_strings();

		// Is an update available?

		$current = get_site_transient( 'update_themes' );

			$this->skin->before();

			$this->skin->error( 'up_to_date' );

			$this->skin->after();

			return false;

		}

		$r = $current->response[ $theme ];

		if ( $parsed_args['clear_update_cache'] ) {

			// Clear cache so wp_update_themes() knows about the new theme.

			add_action( 'upgrader_process_complete', 'wp_clean_themes_cache', 9, 0 );

		}

		remove_action( 'upgrader_process_complete', 'wp_clean_themes_cache', 9 );

			return $this->result;

		wp_clean_themes_cache( $parsed_args['clear_update_cache'] );

		return true;

	}

	/**

	 * Upgrade several themes at once.

	 *

	 * @since 3.0.0

	 * @since 3.7.0 The `$args` parameter was added, making clearing the update cache optional.

	 *

	 *     Optional. Other arguments for upgrading several themes at once. Default empty array.

	 *

	 *     @type bool $clear_update_cache Whether to clear the update cache if successful.

	 *                                    Default true.

	 * }

	 * @return array[]|false An array of results, or false if unable to connect to the filesystem.

	 */

	public function bulk_upgrade( $themes, $args = array() ) {

			'clear_update_cache' => true,

		);

		$parsed_args = wp_parse_args( $args, $defaults );

		$this->init();

		$this->bulk = true;

		$this->upgrade_strings();

		$current = get_site_transient( 'update_themes' );

		$this->skin->header();

		// Connect to the Filesystem first.

		if ( ! $res ) {

			$this->skin->footer();

			return false;

		}

		$this->skin->bulk_header();

		// Only start maintenance mode if:

		// - running Multisite and there are one or more themes specified, OR

		// - a theme with an update available is currently in use.

		// @TODO: For multisite, maintenance mode should only kick in for individual sites if at all possible.

		$maintenance = ( is_multisite() && ! empty( $themes ) );

			$maintenance = $maintenance || $theme == get_stylesheet() || $theme == get_template();

		$results = array();

		$this->update_current = 0;

		foreach ( $themes as $theme ) {

			$this->update_current++;

				$this->skin->before();

				$this->skin->feedback( 'up_to_date' );

				$this->skin->after();

				continue;

			}

			// Get the URL to the zip file

			$r = $current->response[ $theme ];

			// Prevent credentials auth screen from displaying multiple times

				break;