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<?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;

	/**
	 * New theme info.
	 *
	 * @since 5.5.0
	 * @var array $new_theme_data
	 *
	 * @see check_package()
	 */
	public $new_theme_data = array();

	/**
	 * Initializes the upgrade strings.
	 *
	 * @since 2.8.0
	 */
	public function upgrade_strings() {
		$this->strings['up_to_date'] = __( 'The theme is at the latest version.' );
		$this->strings['no_package'] = __( 'Update package not available.' );
		/* translators: %s: Package URL. */
		$this->strings['downloading_package'] = sprintf( __( 'Downloading update from %s&#8230;' ), '<span class="code pre">%s</span>' );
		$this->strings['unpack_package']      = __( 'Unpacking the update&#8230;' );
		$this->strings['remove_old']          = __( 'Removing the old version of the theme&#8230;' );
		$this->strings['remove_old_failed']   = __( 'Could not remove the old theme.' );
		$this->strings['process_failed']      = __( 'Theme update failed.' );
		$this->strings['process_success']     = __( 'Theme updated successfully.' );
	}

	/**
	 * Initializes the installation strings.
	 *
	 * @since 2.8.0
	 */
	public function install_strings() {
		$this->strings['no_package'] = __( 'Installation package not available.' );
		/* translators: %s: Package URL. */
		$this->strings['downloading_package'] = sprintf( __( 'Downloading installation package from %s&#8230;' ), '<span class="code pre">%s</span>' );
		$this->strings['unpack_package']      = __( 'Unpacking the package&#8230;' );
		$this->strings['installing_package']  = __( 'Installing the theme&#8230;' );
		$this->strings['remove_old']          = __( 'Removing the old version of the theme&#8230;' );
		$this->strings['remove_old_failed']   = __( 'Could not remove the old theme.' );
		$this->strings['no_files']            = __( 'The theme contains no files.' );
		$this->strings['process_failed']      = __( 'Theme installation failed.' );
		$this->strings['process_success']     = __( 'Theme installed successfully.' );
		/* translators: 1: Theme name, 2: Theme version. */
		$this->strings['process_success_specific'] = __( 'Successfully installed the theme <strong>%1$s %2$s</strong>.' );
		$this->strings['parent_theme_search']      = __( 'This theme requires a parent theme. Checking if it is installed&#8230;' );
		/* translators: 1: Theme name, 2: Theme version. */
		$this->strings['parent_theme_prepare_install'] = __( 'Preparing to install <strong>%1$s %2$s</strong>&#8230;' );
		/* translators: 1: Theme name, 2: Theme version. */
		$this->strings['parent_theme_currently_installed'] = __( 'The parent theme, <strong>%1$s %2$s</strong>, is currently installed.' );
		/* translators: 1: Theme name, 2: Theme version. */
		$this->strings['parent_theme_install_success'] = __( 'Successfully installed the parent theme, <strong>%1$s %2$s</strong>.' );
		/* 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>' );
		/* translators: %s: Theme error. */
		$this->strings['current_theme_has_errors'] = __( 'The active theme has the following error: "%s".' );

		if ( ! empty( $this->skin->overwrite ) ) {
			if ( 'update-theme' === $this->skin->overwrite ) {
				$this->strings['installing_package'] = __( 'Updating the theme&#8230;' );
				$this->strings['process_failed']     = __( 'Theme update failed.' );
				$this->strings['process_success']    = __( 'Theme updated successfully.' );
			}

			if ( 'downgrade-theme' === $this->skin->overwrite ) {
				$this->strings['installing_package'] = __( 'Downgrading the theme&#8230;' );
				$this->strings['process_failed']     = __( 'Theme downgrade failed.' );
				$this->strings['process_success']    = __( 'Theme downgraded successfully.' );
			}
		}
	}

	/**
	 * Checks if a child theme is being installed and its parent also needs to be installed.
	 *
	 * 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 bool
	 */
	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();

		if ( ! $theme_info->parent() ) {
			return $install_result;
		}

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

		if ( ! $theme_info->parent()->errors() ) {
			$this->skin->feedback( 'parent_theme_currently_installed', $theme_info->parent()->display( 'Name' ), $theme_info->parent()->display( 'Version' ) );
			// We already have the theme, fall through.
			return $install_result;
		}

		// We don't have the parent theme, let's install it.
		$api = themes_api(
			'theme_information',
			array(
				'slug'   => $theme_info->get( 'Template' ),
				'fields' => array(
					'sections' => false,
					'tags'     => false,
				),
			)
		); // Save on a bit of bandwidth.

		if ( ! $api || is_wp_error( $api ) ) {
			$this->skin->feedback( 'parent_theme_not_found', $theme_info->get( 'Template' ) );
			// Don't show activate or preview actions after installation.
			add_filter( 'install_theme_complete_actions', array( $this, 'hide_activate_preview_actions' ) );
			return $install_result;
		}

		// Backup required data we're going to override:
		$child_api             = $this->skin->api;
		$child_success_message = $this->strings['process_success'];

		// Override them.
		$this->skin->api = $api;

		$this->strings['process_success_specific'] = $this->strings['parent_theme_install_success'];

		$this->skin->feedback( 'parent_theme_prepare_install', $api->name, $api->version );

		add_filter( 'install_theme_complete_actions', '__return_false', 999 ); // Don't show any actions after installing the theme.

		// Install the parent theme.
		$parent_result = $this->run(
			array(
				'package'           => $api->download_link,
				'destination'       => get_theme_root(),
				'clear_destination' => false, // Do not overwrite files.
				'clear_working'     => true,
			)
		);

		if ( is_wp_error( $parent_result ) ) {
			add_filter( 'install_theme_complete_actions', array( $this, 'hide_activate_preview_actions' ) );
		}

		// Start cleaning up after the parent's installation.
		remove_filter( 'install_theme_complete_actions', '__return_false', 999 );

		// Reset child's result and data.
		$this->result                     = $child_result;
		$this->skin->api                  = $child_api;
		$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 ) {
		unset( $actions['activate'], $actions['preview'] );
		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() ) {
		$defaults    = array(
			'clear_update_cache' => true,
			'overwrite_package'  => false, // Do not overwrite files.
		);
		$parsed_args = wp_parse_args( $args, $defaults );

		$this->init();
		$this->install_strings();

		add_filter( 'upgrader_source_selection', array( $this, 'check_package' ) );
		add_filter( 'upgrader_post_install', array( $this, 'check_parent_theme_filter' ), 10, 3 );

		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 );
		}

		$this->run(
			array(
				'package'           => $package,
				'destination'       => get_theme_root(),
				'clear_destination' => $parsed_args['overwrite_package'],
				'clear_working'     => true,
				'hook_extra'        => array(
					'type'   => 'theme',
					'action' => 'install',
				),
			)
		);

		remove_action( 'upgrader_process_complete', 'wp_clean_themes_cache', 9 );
		remove_filter( 'upgrader_source_selection', array( $this, 'check_package' ) );
		remove_filter( 'upgrader_post_install', array( $this, 'check_parent_theme_filter' ) );

		if ( ! $this->result || is_wp_error( $this->result ) ) {
			return $this->result;
		}

		// Refresh the Theme Update information.
		wp_clean_themes_cache( $parsed_args['clear_update_cache'] );

		if ( $parsed_args['overwrite_package'] ) {
			/** This action is documented in wp-admin/includes/class-plugin-upgrader.php */
			do_action( 'upgrader_overwrote_package', $package, $this->new_theme_data, 'theme' );
		}

		return true;
	}

	/**
	 * Upgrades 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() ) {
		$defaults    = 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' );
		if ( ! isset( $current->response[ $theme ] ) ) {
			$this->skin->before();
			$this->skin->set_result( false );
			$this->skin->error( 'up_to_date' );
			$this->skin->after();
			return false;
		}

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

		add_filter( 'upgrader_pre_install', array( $this, 'current_before' ), 10, 2 );
		add_filter( 'upgrader_post_install', array( $this, 'current_after' ), 10, 2 );
		add_filter( 'upgrader_clear_destination', array( $this, 'delete_old_theme' ), 10, 4 );
		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 );
		}

		$this->run(
			array(
				'package'           => $r['package'],
				'destination'       => get_theme_root( $theme ),
				'clear_destination' => true,
				'clear_working'     => true,
				'hook_extra'        => array(
					'theme'       => $theme,
					'type'        => 'theme',
					'action'      => 'update',
					'temp_backup' => array(
						'slug' => $theme,
						'src'  => get_theme_root( $theme ),
						'dir'  => 'themes',
					),
				),
			)
		);

		remove_action( 'upgrader_process_complete', 'wp_clean_themes_cache', 9 );
		remove_filter( 'upgrader_pre_install', array( $this, 'current_before' ) );
		remove_filter( 'upgrader_post_install', array( $this, 'current_after' ) );
		remove_filter( 'upgrader_clear_destination', array( $this, 'delete_old_theme' ) );

		if ( ! $this->result || is_wp_error( $this->result ) ) {
			return $this->result;
		}

		wp_clean_themes_cache( $parsed_args['clear_update_cache'] );

		/*
		 * Ensure any future auto-update failures trigger a failure email by removing
		 * the last failure notification from the list when themes update successfully.
		 */
		$past_failure_emails = get_option( 'auto_plugin_theme_update_emails', array() );

		if ( isset( $past_failure_emails[ $theme ] ) ) {
			unset( $past_failure_emails[ $theme ] );
			update_option( 'auto_plugin_theme_update_emails', $past_failure_emails );
		}

		return true;
	}

	/**
	 * Upgrades several themes at once.
	 *
	 * @since 3.0.0
	 * @since 3.7.0 The `$args` parameter was added, making clearing the update cache optional.
	 *
	 * @param string[] $themes Array of the theme slugs.
	 * @param array    $args {
	 *     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() ) {
		$wp_version  = wp_get_wp_version();
		$defaults    = 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' );

		add_filter( 'upgrader_pre_install', array( $this, 'current_before' ), 10, 2 );
		add_filter( 'upgrader_post_install', array( $this, 'current_after' ), 10, 2 );
		add_filter( 'upgrader_clear_destination', array( $this, 'delete_old_theme' ), 10, 4 );

		$this->skin->header();

		// Connect to the filesystem first.
		$res = $this->fs_connect( array( WP_CONTENT_DIR ) );
		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 ) );
		foreach ( $themes as $theme ) {
			$maintenance = $maintenance || get_stylesheet() === $theme || get_template() === $theme;
		}
		if ( $maintenance ) {
			$this->maintenance_mode( true );
		}

		$results = array();

		$this->update_count   = count( $themes );
		$this->update_current = 0;
		foreach ( $themes as $theme ) {
			++$this->update_current;

			$this->skin->theme_info = $this->theme_info( $theme );

			if ( ! isset( $current->response[ $theme ] ) ) {
				$this->skin->set_result( true );
				$this->skin->before();
				$this->skin->feedback( 'up_to_date' );
				$this->skin->after();
				$results[ $theme ] = true;
				continue;
			}

			// Get the URL to the zip file.
			$r = $current->response[ $theme ];

			if ( isset( $r['requires'] ) && ! is_wp_version_compatible( $r['requires'] ) ) {
				$result = new WP_Error(
					'incompatible_wp_required_version',
					sprintf(
						/* translators: 1: Current WordPress version, 2: WordPress version required by the new theme version. */
						__( 'Your WordPress version is %1$s, however the new theme version requires %2$s.' ),
						$wp_version,
						$r['requires']
					)
				);

				$this->skin->before( $result );
				$this->skin->error( $result );
				$this->skin->after();
			} elseif ( isset( $r['requires_php'] ) && ! is_php_version_compatible( $r['requires_php'] ) ) {
				$result = new WP_Error(
					'incompatible_php_required_version',
					sprintf(
						/* translators: 1: Current PHP version, 2: PHP version required by the new theme version. */
						__( 'The PHP version on your server is %1$s, however the new theme version requires %2$s.' ),
						PHP_VERSION,
						$r['requires_php']
					)
				);

				$this->skin->before( $result );
				$this->skin->error( $result );
				$this->skin->after();
			} else {
				add_filter( 'upgrader_source_selection', array( $this, 'check_package' ) );
				$result = $this->run(
					array(
						'package'           => $r['package'],
						'destination'       => get_theme_root( $theme ),
						'clear_destination' => true,
						'clear_working'     => true,
						'is_multi'          => true,
						'hook_extra'        => array(
							'theme'       => $theme,
							'temp_backup' => array(
								'slug' => $theme,
								'src'  => get_theme_root( $theme ),
								'dir'  => 'themes',
							),
						),
					)
				);
				remove_filter( 'upgrader_source_selection', array( $this, 'check_package' ) );
			}

			$results[ $theme ] = $result;

			// Prevent credentials auth screen from displaying multiple times.
			if ( false === $result ) {
				break;
			}
		} // End foreach $themes.

		$this->maintenance_mode( false );

		// Refresh the Theme Update information.
		wp_clean_themes_cache( $parsed_args['clear_update_cache'] );

		/** This action is documented in wp-admin/includes/class-wp-upgrader.php */
		do_action(
			'upgrader_process_complete',
			$this,
			array(
				'action' => 'update',
				'type'   => 'theme',
				'bulk'   => true,
				'themes' => $themes,
			)
		);

		$this->skin->bulk_footer();

		$this->skin->footer();

		// Cleanup our hooks, in case something else does an upgrade on this connection.
		remove_filter( 'upgrader_pre_install', array( $this, 'current_before' ) );
		remove_filter( 'upgrader_post_install', array( $this, 'current_after' ) );
		remove_filter( 'upgrader_clear_destination', array( $this, 'delete_old_theme' ) );

		/*
		 * Ensure any future auto-update failures trigger a failure email by removing
		 * the last failure notification from the list when themes update successfully.
		 */
		$past_failure_emails = get_option( 'auto_plugin_theme_update_emails', array() );

		foreach ( $results as $theme => $result ) {
			// Maintain last failure notification when themes failed to update manually.
			if ( ! $result || is_wp_error( $result ) || ! isset( $past_failure_emails[ $theme ] ) ) {
				continue;
			}

			unset( $past_failure_emails[ $theme ] );
		}

		update_option( 'auto_plugin_theme_update_emails', $past_failure_emails );

		return $results;
	}

	/**
	 * Checks that the package source contains a valid theme.
	 *
	 * Hooked to the {@see 'upgrader_source_selection'} filter by Theme_Upgrader::install().
	 *
	 * @since 3.3.0
	 *
	 * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
	 *
	 * @param string $source The path to the downloaded package source.
	 * @return string|WP_Error The source as passed, or a WP_Error object on failure.
	 */
	public function check_package( $source ) {
		global $wp_filesystem;

		$wp_version           = wp_get_wp_version();
		$this->new_theme_data = array();

		if ( is_wp_error( $source ) ) {
			return $source;
		}

		// Check that the folder contains a valid theme.
		$working_directory = str_replace( $wp_filesystem->wp_content_dir(), trailingslashit( WP_CONTENT_DIR ), $source );
		if ( ! is_dir( $working_directory ) ) { // Confidence check, if the above fails, let's not prevent installation.
			return $source;
		}

		// A proper archive should have a style.css file in the single subdirectory.
		if ( ! file_exists( $working_directory . 'style.css' ) ) {
			return new WP_Error(
				'incompatible_archive_theme_no_style',
				$this->strings['incompatible_archive'],
				sprintf(
					/* translators: %s: style.css */
					__( 'The theme is missing the %s stylesheet.' ),
					'<code>style.css</code>'
				)
			);
		}

		// All these headers are needed on Theme_Installer_Skin::do_overwrite().
		$info = get_file_data(
			$working_directory . 'style.css',
			array(
				'Name'        => 'Theme Name',
				'Version'     => 'Version',
				'Author'      => 'Author',
				'Template'    => 'Template',
				'RequiresWP'  => 'Requires at least',
				'RequiresPHP' => 'Requires PHP',
			)
		);

		if ( empty( $info['Name'] ) ) {
			return new WP_Error(
				'incompatible_archive_theme_no_name',
				$this->strings['incompatible_archive'],
				sprintf(
					/* translators: %s: style.css */
					__( 'The %s stylesheet does not contain a valid theme header.' ),
					'<code>style.css</code>'
				)
			);
		}

		/*
		 * Parent themes must contain an index file:
		 * - classic themes require /index.php
		 * - block themes require /templates/index.html or block-templates/index.html (deprecated 5.9.0).
		 */
		if (
			empty( $info['Template'] ) &&
			! file_exists( $working_directory . 'index.php' ) &&
			! file_exists( $working_directory . 'templates/index.html' ) &&
			! file_exists( $working_directory . 'block-templates/index.html' )
		) {
			return new WP_Error(
				'incompatible_archive_theme_no_index',
				$this->strings['incompatible_archive'],
				sprintf(
					/* translators: 1: templates/index.html, 2: index.php, 3: Documentation URL, 4: Template, 5: style.css */
					__( 'Template is missing. Standalone themes need to have a %1$s or %2$s template file. <a href="%3$s">Child themes</a> need to have a %4$s header in the %5$s stylesheet.' ),
					'<code>templates/index.html</code>',
					'<code>index.php</code>',
					__( 'https://developer.wordpress.org/themes/advanced-topics/child-themes/' ),
					'<code>Template</code>',
					'<code>style.css</code>'
				)
			);
		}

		$requires_php = isset( $info['RequiresPHP'] ) ? $info['RequiresPHP'] : null;
		$requires_wp  = isset( $info['RequiresWP'] ) ? $info['RequiresWP'] : null;

		if ( ! is_php_version_compatible( $requires_php ) ) {
			$error = sprintf(
				/* translators: 1: Current PHP version, 2: Version required by the uploaded theme. */
				__( 'The PHP version on your server is %1$s, however the uploaded theme requires %2$s.' ),
				PHP_VERSION,
				$requires_php
			);

			return new WP_Error( 'incompatible_php_required_version', $this->strings['incompatible_archive'], $error );
		}
		if ( ! is_wp_version_compatible( $requires_wp ) ) {
			$error = sprintf(
				/* translators: 1: Current WordPress version, 2: Version required by the uploaded theme. */
				__( 'Your WordPress version is %1$s, however the uploaded theme requires %2$s.' ),
				$wp_version,
				$requires_wp
			);

			return new WP_Error( 'incompatible_wp_required_version', $this->strings['incompatible_archive'], $error );
		}

		$this->new_theme_data = $info;

		return $source;
	}

	/**
	 * Turns on maintenance mode before attempting to upgrade the active theme.
	 *
	 * Hooked to the {@see 'upgrader_pre_install'} filter by Theme_Upgrader::upgrade() and
	 * Theme_Upgrader::bulk_upgrade().
	 *
	 * @since 2.8.0
	 *
	 * @param bool|WP_Error $response The installation response before the installation has started.
	 * @param array         $theme    Theme arguments.
	 * @return bool|WP_Error The original `$response` parameter or WP_Error.
	 */
	public function current_before( $response, $theme ) {
		if ( is_wp_error( $response ) ) {
			return $response;
		}

		$theme = isset( $theme['theme'] ) ? $theme['theme'] : '';

		// Only run if active theme.
		if ( get_stylesheet() !== $theme ) {
			return $response;
		}

		// Change to maintenance mode. Bulk edit handles this separately.
		if ( ! $this->bulk ) {
			$this->maintenance_mode( true );
		}

		return $response;
	}

	/**
	 * Turns off maintenance mode after upgrading the active theme.
	 *
	 * Hooked to the {@see 'upgrader_post_install'} filter by Theme_Upgrader::upgrade()
	 * and Theme_Upgrader::bulk_upgrade().
	 *
	 * @since 2.8.0
	 *
	 * @param bool|WP_Error $response The installation response after the installation has finished.
	 * @param array         $theme    Theme arguments.
	 * @return bool|WP_Error The original `$response` parameter or WP_Error.
	 */
	public function current_after( $response, $theme ) {
		if ( is_wp_error( $response ) ) {
			return $response;
		}

		$theme = isset( $theme['theme'] ) ? $theme['theme'] : '';

		// Only run if active theme.
		if ( get_stylesheet() !== $theme ) {
			return $response;
		}

		// Ensure stylesheet name hasn't changed after the upgrade:
		if ( get_stylesheet() === $theme && $theme !== $this->result['destination_name'] ) {
			wp_clean_themes_cache();
			$stylesheet = $this->result['destination_name'];
			switch_theme( $stylesheet );
		}

		// Time to remove maintenance mode. Bulk edit handles this separately.
		if ( ! $this->bulk ) {
			$this->maintenance_mode( false );
		}
		return $response;
	}

	/**
	 * Deletes the old theme during an upgrade.
	 *
	 * Hooked to the {@see 'upgrader_clear_destination'} filter by Theme_Upgrader::upgrade()
	 * and Theme_Upgrader::bulk_upgrade().
	 *
	 * @since 2.8.0
	 *
	 * @global WP_Filesystem_Base $wp_filesystem Subclass
	 *
	 * @param bool   $removed
	 * @param string $local_destination
	 * @param string $remote_destination
	 * @param array  $theme
	 * @return bool
	 */
	public function delete_old_theme( $removed, $local_destination, $remote_destination, $theme ) {
		global $wp_filesystem;

		if ( is_wp_error( $removed ) ) {
			return $removed; // Pass errors through.
		}

		if ( ! isset( $theme['theme'] ) ) {
			return $removed;
		}

		$theme      = $theme['theme'];
		$themes_dir = trailingslashit( $wp_filesystem->wp_themes_dir( $theme ) );
		if ( $wp_filesystem->exists( $themes_dir . $theme ) ) {
			if ( ! $wp_filesystem->delete( $themes_dir . $theme, true ) ) {
				return false;
			}
		}

		return true;
	}

	/**
	 * Gets the WP_Theme object for a theme.
	 *
	 * @since 2.8.0
	 * @since 3.0.0 The `$theme` argument was added.
	 *
	 * @param string $theme The directory name of the theme. This is optional, and if not supplied,
	 *                      the directory name from the last result will be used.
	 * @return WP_Theme|false The theme's info object, or false `$theme` is not supplied
	 *                        and the last result isn't set.
	 */
	public function theme_info( $theme = null ) {
		if ( empty( $theme ) ) {
			if ( ! empty( $this->result['destination_name'] ) ) {
				$theme = $this->result['destination_name'];
			} else {
				return false;
			}
		}

		$theme = wp_get_theme( $theme );
		$theme->cache_delete();

		return $theme;
	}
}

Filemanager

Name Type Size Permission Actions
admin-filters.php File 7.89 KB 0644
admin.php File 3.54 KB 0644
ajax-actions.php File 148.07 KB 0644
bookmark.php File 11.34 KB 0644
class-automatic-upgrader-skin.php File 3.58 KB 0644
class-bulk-plugin-upgrader-skin.php File 2.53 KB 0644
class-bulk-theme-upgrader-skin.php File 2.6 KB 0644
class-bulk-upgrader-skin.php File 6.59 KB 0644
class-core-upgrader.php File 14.83 KB 0644
class-custom-background.php File 21.11 KB 0644
class-custom-image-header.php File 47.91 KB 0644
class-file-upload-upgrader.php File 4.07 KB 0644
class-ftp-pure.php File 5.3 KB 0644
class-ftp-sockets.php File 8.28 KB 0644
class-ftp.php File 26.66 KB 0644
class-language-pack-upgrader-skin.php File 2.8 KB 0644
class-language-pack-upgrader.php File 15.2 KB 0644
class-pclzip.php File 192.09 KB 0644
class-plugin-installer-skin.php File 11.77 KB 0644
class-plugin-upgrader-skin.php File 3.2 KB 0644
class-plugin-upgrader.php File 22.7 KB 0644
class-theme-installer-skin.php File 12.44 KB 0644
class-theme-upgrader-skin.php File 4.08 KB 0644
class-theme-upgrader.php File 26.08 KB 0644
class-walker-category-checklist.php File 4.97 KB 0644
class-walker-nav-menu-checklist.php File 5.5 KB 0644
class-walker-nav-menu-edit.php File 13.85 KB 0644
class-wp-ajax-upgrader-skin.php File 4.09 KB 0644
class-wp-application-passwords-list-table.php File 6.79 KB 0644
class-wp-automatic-updater.php File 59.7 KB 0644
class-wp-comments-list-table.php File 32.15 KB 0644
class-wp-community-events.php File 18.33 KB 0644
class-wp-debug-data.php File 63.76 KB 0644
class-wp-filesystem-base.php File 23.84 KB 0644
class-wp-filesystem-direct.php File 17.72 KB 0644
class-wp-filesystem-ftpext.php File 22.56 KB 0644
class-wp-filesystem-ftpsockets.php File 18.05 KB 0644
class-wp-filesystem-ssh2.php File 22.76 KB 0644
class-wp-importer.php File 7.29 KB 0644
class-wp-internal-pointers.php File 4.47 KB 0644
class-wp-links-list-table.php File 9.02 KB 0644
class-wp-list-table-compat.php File 1.46 KB 0644
class-wp-list-table.php File 51.63 KB 0644
class-wp-media-list-table.php File 25.03 KB 0644
class-wp-ms-sites-list-table.php File 21.51 KB 0644
class-wp-ms-themes-list-table.php File 27.67 KB 0644
class-wp-ms-users-list-table.php File 14.93 KB 0644
class-wp-plugin-install-list-table.php File 24.21 KB 0644
class-wp-plugins-list-table.php File 56.43 KB 0644
class-wp-post-comments-list-table.php File 1.42 KB 0644
class-wp-posts-list-table.php File 62.45 KB 0644
class-wp-privacy-data-export-requests-list-table.php File 5.43 KB 0644
class-wp-privacy-data-removal-requests-list-table.php File 5.58 KB 0644
class-wp-privacy-policy-content.php File 32.01 KB 0644
class-wp-privacy-requests-table.php File 13.65 KB 0644
class-wp-screen.php File 36.45 KB 0644
class-wp-site-health-auto-updates.php File 13.24 KB 0644
class-wp-site-health.php File 119.5 KB 0644
class-wp-site-icon.php File 6.26 KB 0644
class-wp-terms-list-table.php File 20.69 KB 0644
class-wp-theme-install-list-table.php File 15.42 KB 0644
class-wp-themes-list-table.php File 10.1 KB 0644
class-wp-upgrader-skin.php File 6.94 KB 0644
class-wp-upgrader-skins.php File 1.44 KB 0644
class-wp-upgrader.php File 46.58 KB 0644
class-wp-users-list-table.php File 18.61 KB 0644
comment.php File 5.98 KB 0644
continents-cities.php File 20.06 KB 0644
credits.php File 5.73 KB 0644
dashboard.php File 68.08 KB 0644
deprecated.php File 40.8 KB 0644
edit-tag-messages.php File 1.44 KB 0644
error_log File 550 B 0644
export.php File 24.97 KB 0644
file.php File 95.19 KB 0644
image-edit.php File 42.82 KB 0644
image.php File 42.4 KB 0644
import.php File 6.46 KB 0644
list-table.php File 3.71 KB 0644
media.php File 116.08 KB 0644
menu.php File 9.39 KB 0644
meta-boxes.php File 64.54 KB 0644
misc.php File 45.38 KB 0644
ms-admin-filters.php File 1.27 KB 0644
ms-deprecated.php File 3.68 KB 0644
ms.php File 33.16 KB 0644
nav-menu.php File 47.76 KB 0644
network.php File 26.35 KB 0644
noop.php File 1.12 KB 0644
options.php File 4.15 KB 0644
plugin-install.php File 38.55 KB 0644
plugin.php File 90.75 KB 0644
post.php File 79.77 KB 0644
privacy-tools.php File 32.68 KB 0644
revision.php File 16.11 KB 0644
schema.php File 41.66 KB 0644
screen.php File 6.23 KB 0644
taxonomy.php File 8.23 KB 0644
template.php File 96.31 KB 0644
theme-install.php File 6.83 KB 0644
theme.php File 46.62 KB 0644
translation-install.php File 10.82 KB 0644
update-core.php File 67.71 KB 0644
update.php File 33.62 KB 0644
upgrade.php File 111.22 KB 0644
user.php File 22.96 KB 0644
widgets.php File 10.66 KB 0644