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<?php

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/**

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* Upgrade API: Theme_Upgrader class

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* @package WordPress

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* @subpackage Upgrader

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* @since 4.6.0

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/**

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* Core class used for upgrading/installing themes.

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

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* or uploaded zip file.

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* @since 2.8.0

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

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* @see WP_Upgrader

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class Theme_Upgrader extends WP_Upgrader {

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/**

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* Result of the theme upgrade offer.

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* @since 2.8.0

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* @var array|WP_Error $result

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* @see WP_Upgrader::$result

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public $result;

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/**

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

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* @since 2.9.0

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* @var bool $bulk

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public $bulk = false;

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/**

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* New theme info.

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* @since 5.5.0

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* @var array $new_theme_data

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* @see check_package()

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public $new_theme_data = array();

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/**

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* Initialize the upgrade strings.

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* @since 2.8.0

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public function upgrade_strings() {

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$this->strings['up_to_date'] = __( 'The theme is at the latest version.' );

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$this->strings['no_package'] = __( 'Update package not available.' );

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/* translators: %s: Package URL. */

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$this->strings['downloading_package'] = sprintf( __( 'Downloading update from %s…' ), '%s' );

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$this->strings['unpack_package'] = __( 'Unpacking the update…' );

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$this->strings['remove_old'] = __( 'Removing the old version of the theme…' );

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$this->strings['remove_old_failed'] = __( 'Could not remove the old theme.' );

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$this->strings['process_failed'] = __( 'Theme update failed.' );

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$this->strings['process_success'] = __( 'Theme updated successfully.' );

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}

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/**

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* Initialize the installation strings.

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* @since 2.8.0

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public function install_strings() {

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$this->strings['no_package'] = __( 'Installation package not available.' );

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/* translators: %s: Package URL. */

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$this->strings['downloading_package'] = sprintf( __( 'Downloading installation package from %s…' ), '%s' );

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$this->strings['unpack_package'] = __( 'Unpacking the package…' );

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$this->strings['installing_package'] = __( 'Installing the theme…' );

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$this->strings['remove_old'] = __( 'Removing the old version of the theme…' );

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$this->strings['remove_old_failed'] = __( 'Could not remove the old theme.' );

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$this->strings['no_files'] = __( 'The theme contains no files.' );

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$this->strings['process_failed'] = __( 'Theme installation failed.' );

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$this->strings['process_success'] = __( 'Theme installed successfully.' );

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/* translators: 1: Theme name, 2: Theme version. */

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$this->strings['process_success_specific'] = __( 'Successfully installed the theme %1$s %2$s.' );

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$this->strings['parent_theme_search'] = __( 'This theme requires a parent theme. Checking if it is installed…' );

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/* translators: 1: Theme name, 2: Theme version. */

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$this->strings['parent_theme_prepare_install'] = __( 'Preparing to install %1$s %2$s…' );

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/* translators: 1: Theme name, 2: Theme version. */

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$this->strings['parent_theme_currently_installed'] = __( 'The parent theme, %1$s %2$s, is currently installed.' );

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/* translators: 1: Theme name, 2: Theme version. */

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$this->strings['parent_theme_install_success'] = __( 'Successfully installed the parent theme, %1$s %2$s.' );

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/* translators: %s: Theme name. */

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

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/* translators: %s: Theme error. */

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$this->strings['current_theme_has_errors'] = __( 'The current theme has the following error: "%s".' );

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if ( ! empty( $this->skin->overwrite ) ) {

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if ( 'update-theme' === $this->skin->overwrite ) {

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$this->strings['installing_package'] = __( 'Updating the theme…' );

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$this->strings['process_failed'] = __( 'Theme update failed.' );

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$this->strings['process_success'] = __( 'Theme updated successfully.' );

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}

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if ( 'downgrade-theme' === $this->skin->overwrite ) {

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$this->strings['installing_package'] = __( 'Downgrading the theme…' );

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$this->strings['process_failed'] = __( 'Theme downgrade failed.' );

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$this->strings['process_success'] = __( 'Theme downgraded successfully.' );

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}

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}

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}

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/**

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

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

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* @since 3.4.0

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* @param bool $install_result

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* @param array $hook_extra

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* @param array $child_result

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* @return bool

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

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

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$theme_info = $this->theme_info();

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

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return $install_result;

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}

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

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

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$this->skin->feedback( 'parent_theme_currently_installed', $theme_info->parent()->display( 'Name' ), $theme_info->parent()->display( 'Version' ) );

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// We already have the theme, fall through.

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return $install_result;

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}

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

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$api = themes_api(

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'theme_information',

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array(

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'slug' => $theme_info->get( 'Template' ),

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'fields' => array(

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'sections' => false,

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'tags' => false,

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)

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); // Save on a bit of bandwidth.

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if ( ! $api || is_wp_error( $api ) ) {

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$this->skin->feedback( 'parent_theme_not_found', $theme_info->get( 'Template' ) );

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

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add_filter( 'install_theme_complete_actions', array( $this, 'hide_activate_preview_actions' ) );

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return $install_result;

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}

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

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$child_api = $this->skin->api;

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

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// Override them.

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$this->skin->api = $api;

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

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

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

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// Install the parent theme.

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$parent_result = $this->run(

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array(

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'package' => $api->download_link,

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'destination' => get_theme_root(),

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'clear_destination' => false, // Do not overwrite files.

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'clear_working' => true,

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)

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);

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if ( is_wp_error( $parent_result ) ) {

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add_filter( 'install_theme_complete_actions', array( $this, 'hide_activate_preview_actions' ) );

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}

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// Start cleaning up after the parent's installation.

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remove_filter( 'install_theme_complete_actions', '__return_false', 999 );

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// Reset child's result and data.

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$this->result = $child_result;

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$this->skin->api = $child_api;

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

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return $install_result;

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}

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/**

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

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

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* Theme_Upgrader::check_parent_theme_filter() when installing

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* a child theme and installing the parent theme fails.

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* @since 3.4.0

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* @param array $actions Preview actions.

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* @return array

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public function hide_activate_preview_actions( $actions ) {

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unset( $actions['activate'], $actions['preview'] );

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return $actions;

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}

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/**

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* Install a theme package.

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* @since 2.8.0

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

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

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* @param array $args {

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

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

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* Default true.

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* }

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

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

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$defaults = array(

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'clear_update_cache' => true,

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'overwrite_package' => false, // Do not overwrite files.

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);

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

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$this->init();

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$this->install_strings();

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add_filter( 'upgrader_source_selection', array( $this, 'check_package' ) );

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

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if ( $parsed_args['clear_update_cache'] ) {

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

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

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}

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$this->run(

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array(

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'package' => $package,

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'destination' => get_theme_root(),

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'clear_destination' => $parsed_args['overwrite_package'],

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'clear_working' => true,

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'hook_extra' => array(

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'type' => 'theme',

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'action' => 'install',

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)

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);

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

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remove_filter( 'upgrader_source_selection', array( $this, 'check_package' ) );

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remove_filter( 'upgrader_post_install', array( $this, 'check_parent_theme_filter' ) );

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

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return $this->result;

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}

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// Refresh the Theme Update information.

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wp_clean_themes_cache( $parsed_args['clear_update_cache'] );

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if ( $parsed_args['overwrite_package'] ) {

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/** This action is documented in wp-admin/includes/class-plugin-upgrader.php */

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do_action( 'upgrader_overwrote_package', $package, $this->new_theme_data, 'theme' );

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}

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return true;

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}

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/**

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* Upgrade a theme.

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* @since 2.8.0

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

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* @param string $theme The theme slug.

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* @param array $args {

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

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

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* Default true.

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* }

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

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

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$defaults = array(

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'clear_update_cache' => true,

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);

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

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$this->init();

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$this->upgrade_strings();

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// Is an update available?

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$current = get_site_transient( 'update_themes' );

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if ( ! isset( $current->response[ $theme ] ) ) {

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$this->skin->before();

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$this->skin->set_result( false );

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

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$this->skin->after();

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return false;

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}

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

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add_filter( 'upgrader_pre_install', array( $this, 'current_before' ), 10, 2 );

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add_filter( 'upgrader_post_install', array( $this, 'current_after' ), 10, 2 );

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add_filter( 'upgrader_clear_destination', array( $this, 'delete_old_theme' ), 10, 4 );

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if ( $parsed_args['clear_update_cache'] ) {

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

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

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}

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$this->run(

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array(

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'package' => $r['package'],

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'destination' => get_theme_root( $theme ),

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'clear_destination' => true,

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'clear_working' => true,

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'hook_extra' => array(

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'theme' => $theme,

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'type' => 'theme',

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'action' => 'update',

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)

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);

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

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remove_filter( 'upgrader_pre_install', array( $this, 'current_before' ) );

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remove_filter( 'upgrader_post_install', array( $this, 'current_after' ) );

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remove_filter( 'upgrader_clear_destination', array( $this, 'delete_old_theme' ) );

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

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return $this->result;

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}

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wp_clean_themes_cache( $parsed_args['clear_update_cache'] );

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// Ensure any future auto-update failures trigger a failure email by removing

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// the last failure notification from the list when themes update successfully.

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$past_failure_emails = get_option( 'auto_plugin_theme_update_emails', array() );

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if ( isset( $past_failure_emails[ $theme ] ) ) {

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unset( $past_failure_emails[ $theme ] );

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update_option( 'auto_plugin_theme_update_emails', $past_failure_emails );

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}

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return true;

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}

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/**

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* Upgrade several themes at once.

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* @since 3.0.0

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

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* @param string[] $themes Array of the theme slugs.

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* @param array $args {

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

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

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* Default true.

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* }

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

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

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$defaults = array(

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'clear_update_cache' => true,

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);

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

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$this->init();

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$this->bulk = true;

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$this->upgrade_strings();

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$current = get_site_transient( 'update_themes' );

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add_filter( 'upgrader_pre_install', array( $this, 'current_before' ), 10, 2 );

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add_filter( 'upgrader_post_install', array( $this, 'current_after' ), 10, 2 );

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add_filter( 'upgrader_clear_destination', array( $this, 'delete_old_theme' ), 10, 4 );

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$this->skin->header();

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// Connect to the filesystem first.

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

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if ( ! $res ) {

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$this->skin->footer();

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return false;

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}

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$this->skin->bulk_header();

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* Only start maintenance mode if:

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

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

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* @todo For multisite, maintenance mode should only kick in for individual sites if at all possible.

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

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foreach ( $themes as $theme ) {

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

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}

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if ( $maintenance ) {

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$this->maintenance_mode( true );

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}

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$results = array();

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$this->update_count = count( $themes );

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$this->update_current = 0;

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foreach ( $themes as $theme ) {

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$this->update_current++;

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

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if ( ! isset( $current->response[ $theme ] ) ) {

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$this->skin->set_result( true );

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$this->skin->before();

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

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$this->skin->after();

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$results[ $theme ] = true;

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continue;

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}

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// Get the URL to the zip file.

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

[435] Fix | Delete

[436] Fix | Delete

$result = $this->run(

[437] Fix | Delete

array(

[438] Fix | Delete

'package' => $r['package'],

[439] Fix | Delete

'destination' => get_theme_root( $theme ),

[440] Fix | Delete

'clear_destination' => true,

[441] Fix | Delete

'clear_working' => true,

[442] Fix | Delete

'is_multi' => true,

[443] Fix | Delete

'hook_extra' => array(

[444] Fix | Delete

'theme' => $theme,

[445] Fix | Delete

[446] Fix | Delete

)

[447] Fix | Delete

);

[448] Fix | Delete

[449] Fix | Delete

$results[ $theme ] = $this->result;

[450] Fix | Delete

[451] Fix | Delete

// Prevent credentials auth screen from displaying multiple times.

[452] Fix | Delete

if ( false === $result ) {

[453] Fix | Delete

break;

[454] Fix | Delete

}

[455] Fix | Delete

} // End foreach $themes.

[456] Fix | Delete

[457] Fix | Delete

$this->maintenance_mode( false );

[458] Fix | Delete

[459] Fix | Delete

// Refresh the Theme Update information.

[460] Fix | Delete

wp_clean_themes_cache( $parsed_args['clear_update_cache'] );

[461] Fix | Delete

[462] Fix | Delete

/** This action is documented in wp-admin/includes/class-wp-upgrader.php */

[463] Fix | Delete

do_action(

[464] Fix | Delete

'upgrader_process_complete',

[465] Fix | Delete

$this,

[466] Fix | Delete

array(

[467] Fix | Delete

'action' => 'update',

[468] Fix | Delete

'type' => 'theme',

[469] Fix | Delete

'bulk' => true,

[470] Fix | Delete

'themes' => $themes,

[471] Fix | Delete

)

[472] Fix | Delete

);

[473] Fix | Delete

[474] Fix | Delete

$this->skin->bulk_footer();

[475] Fix | Delete

[476] Fix | Delete

$this->skin->footer();

[477] Fix | Delete

[478] Fix | Delete

// Cleanup our hooks, in case something else does a upgrade on this connection.

[479] Fix | Delete

remove_filter( 'upgrader_pre_install', array( $this, 'current_before' ) );

[480] Fix | Delete

remove_filter( 'upgrader_post_install', array( $this, 'current_after' ) );

[481] Fix | Delete

remove_filter( 'upgrader_clear_destination', array( $this, 'delete_old_theme' ) );

[482] Fix | Delete

[483] Fix | Delete

// Ensure any future auto-update failures trigger a failure email by removing

[484] Fix | Delete

// the last failure notification from the list when themes update successfully.

[485] Fix | Delete

$past_failure_emails = get_option( 'auto_plugin_theme_update_emails', array() );

[486] Fix | Delete

[487] Fix | Delete

foreach ( $results as $theme => $result ) {

[488] Fix | Delete

// Maintain last failure notification when themes failed to update manually.

[489] Fix | Delete

if ( ! $result || is_wp_error( $result ) || ! isset( $past_failure_emails[ $theme ] ) ) {

[490] Fix | Delete

continue;

[491] Fix | Delete

}

[492] Fix | Delete

[493] Fix | Delete

unset( $past_failure_emails[ $theme ] );

[494] Fix | Delete

}

[495] Fix | Delete

[496] Fix | Delete

update_option( 'auto_plugin_theme_update_emails', $past_failure_emails );

[497] Fix | Delete

[498] Fix | Delete

return $results;

[499] Fix | Delete