WordPress Version: 6.3
/**
* Handles installing a theme via AJAX.
*
* @since 4.6.0
*
* @see Theme_Upgrader
*
* @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
*/
function wp_ajax_install_theme()
{
check_ajax_referer('updates');
if (empty($_POST['slug'])) {
wp_send_json_error(array('slug' => '', 'errorCode' => 'no_theme_specified', 'errorMessage' => __('No theme specified.')));
}
$slug = sanitize_key(wp_unslash($_POST['slug']));
$status = array('install' => 'theme', 'slug' => $slug);
if (!current_user_can('install_themes')) {
$status['errorMessage'] = __('Sorry, you are not allowed to install themes on this site.');
wp_send_json_error($status);
}
require_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
require_once ABSPATH . 'wp-admin/includes/theme.php';
$api = themes_api('theme_information', array('slug' => $slug, 'fields' => array('sections' => false)));
if (is_wp_error($api)) {
$status['errorMessage'] = $api->get_error_message();
wp_send_json_error($status);
}
$skin = new WP_Ajax_Upgrader_Skin();
$upgrader = new Theme_Upgrader($skin);
$result = $upgrader->install($api->download_link);
if (defined('WP_DEBUG') && WP_DEBUG) {
$status['debug'] = $skin->get_upgrade_messages();
}
if (is_wp_error($result)) {
$status['errorCode'] = $result->get_error_code();
$status['errorMessage'] = $result->get_error_message();
wp_send_json_error($status);
} elseif (is_wp_error($skin->result)) {
$status['errorCode'] = $skin->result->get_error_code();
$status['errorMessage'] = $skin->result->get_error_message();
wp_send_json_error($status);
} elseif ($skin->get_errors()->has_errors()) {
$status['errorMessage'] = $skin->get_error_messages();
wp_send_json_error($status);
} elseif (is_null($result)) {
global $wp_filesystem;
$status['errorCode'] = 'unable_to_connect_to_filesystem';
$status['errorMessage'] = __('Unable to connect to the filesystem. Please confirm your credentials.');
// Pass through the error from WP_Filesystem if one was raised.
if ($wp_filesystem instanceof WP_Filesystem_Base && is_wp_error($wp_filesystem->errors) && $wp_filesystem->errors->has_errors()) {
$status['errorMessage'] = esc_html($wp_filesystem->errors->get_error_message());
}
wp_send_json_error($status);
}
$status['themeName'] = wp_get_theme($slug)->get('Name');
if (current_user_can('switch_themes')) {
if (is_multisite()) {
$status['activateUrl'] = add_query_arg(array('action' => 'enable', '_wpnonce' => wp_create_nonce('enable-theme_' . $slug), 'theme' => $slug), network_admin_url('themes.php'));
} else {
$status['activateUrl'] = add_query_arg(array('action' => 'activate', '_wpnonce' => wp_create_nonce('switch-theme_' . $slug), 'stylesheet' => $slug), admin_url('themes.php'));
}
}
$theme = wp_get_theme($slug);
$status['blockTheme'] = $theme->is_block_theme();
if (!is_multisite() && current_user_can('edit_theme_options') && current_user_can('customize')) {
$status['customizeUrl'] = add_query_arg(array('return' => urlencode(network_admin_url('theme-install.php', 'relative'))), wp_customize_url($slug));
}
/*
* See WP_Theme_Install_List_Table::_get_theme_status() if we wanted to check
* on post-installation status.
*/
wp_send_json_success($status);
}