<?php
/**
* Register the scripts, and handles items needed for managing translations within WooCommerce Admin.
*/
namespace Automattic\WooCommerce\Internal\Admin;
use Automattic\WooCommerce\Admin\PageController;
use Automattic\WooCommerce\Internal\Admin\Loader;
/**
* Translations Class.
*/
class Translations {
/**
* Class instance.
*
* @var Translations instance
*/
protected static $instance = null;
/**
* Plugin domain.
*
* @var string
*/
private static $plugin_domain = 'woocommerce';
/**
* Get class instance.
*/
public static function get_instance() {
if ( ! self::$instance ) {
self::$instance = new self();
}
return self::$instance;
}
/**
* Constructor.
* Hooks added here should be removed in `wc_admin_initialize` via the feature plugin.
*/
public function __construct() {
add_action( 'admin_enqueue_scripts', array( $this, 'potentially_load_translation_script_file' ), 15 );
// Combine JSON translation files (from chunks) when language packs are updated.
add_action( 'upgrader_process_complete', array( $this, 'combine_translation_chunk_files' ), 10, 2 );
// Handler for WooCommerce and WooCommerce Admin plugin activation.
add_action( 'woocommerce_activated_plugin', array( $this, 'potentially_generate_translation_strings' ) );
add_action( 'activated_plugin', array( $this, 'potentially_generate_translation_strings' ) );
}
/**
* Generate a filename to cache translations from JS chunks.
*
* @param string $domain Text domain.
* @param string $locale Locale being retrieved.
* @return string Filename.
*/
private function get_combined_translation_filename( $domain, $locale ) {
$filename = implode( '-', array( $domain, $locale, WC_ADMIN_APP ) ) . '.json';
return $filename;
}
/**
* Combines data from translation chunk files based on officially downloaded file format.
*
* @param array $json_i18n_filenames List of JSON chunk files.
* @return array Combined translation chunk data.
*/
private function combine_official_translation_chunks( $json_i18n_filenames ) {
// the filesystem object should be hooked up.
global $wp_filesystem;
$combined_translation_data = array();
foreach ( $json_i18n_filenames as $json_filename ) {
if ( ! $wp_filesystem->is_readable( $json_filename ) ) {
continue;
}
$file_contents = $wp_filesystem->get_contents( $json_filename );
$chunk_data = \json_decode( $file_contents, true );
if ( empty( $chunk_data ) ) {
continue;
}
if ( ! isset( $chunk_data['comment']['reference'] ) ) {
continue;
}
$reference_file = $chunk_data['comment']['reference'];
// Only combine "app" files (not scripts registered with WP).
if (
false === strpos( $reference_file, WC_ADMIN_DIST_JS_FOLDER . 'app/index.js' ) &&
false === strpos( $reference_file, WC_ADMIN_DIST_JS_FOLDER . 'chunks/' )
) {
continue;
}
if ( empty( $combined_translation_data ) ) {
// Use the first translation file as the base structure.
$combined_translation_data = $chunk_data;
} else {
// Combine all messages from all chunk files.
$combined_translation_data['locale_data']['messages'] = array_merge(
$combined_translation_data['locale_data']['messages'],
$chunk_data['locale_data']['messages']
);
}
}
// Remove inaccurate reference comment.
unset( $combined_translation_data['comment'] );
return $combined_translation_data;
}
/**
* Combines data from translation chunk files based on user-generated file formats,
* such as wp-cli tool or Loco Translate plugin.
*
* @param array $json_i18n_filenames List of JSON chunk files.
* @return array Combined translation chunk data.
*/
private function combine_user_translation_chunks( $json_i18n_filenames ) {
// the filesystem object should be hooked up.
global $wp_filesystem;
$combined_translation_data = array();
foreach ( $json_i18n_filenames as $json_filename ) {
if ( ! $wp_filesystem->is_readable( $json_filename ) ) {
continue;
}
$file_contents = $wp_filesystem->get_contents( $json_filename );
$chunk_data = \json_decode( $file_contents, true );
if ( empty( $chunk_data ) ) {
continue;
}
$reference_file = $chunk_data['source'];
// Only combine "app" files (not scripts registered with WP).
if (
false === strpos( $reference_file, WC_ADMIN_DIST_JS_FOLDER . 'app/index.js' ) &&
false === strpos( $reference_file, WC_ADMIN_DIST_JS_FOLDER . 'chunks/' )
) {
continue;
}
if ( empty( $combined_translation_data ) ) {
// Use the first translation file as the base structure.
$combined_translation_data = $chunk_data;
} else {
// Combine all messages from all chunk files.
$combined_translation_data['locale_data']['woocommerce'] = array_merge(
$combined_translation_data['locale_data']['woocommerce'],
$chunk_data['locale_data']['woocommerce']
);
}
}
// Remove inaccurate reference comment.
unset( $combined_translation_data['source'] );
return $combined_translation_data;
}
/**
* Find and combine translation chunk files.
*
* Only targets files that aren't represented by a registered script (e.g. not passed to wp_register_script()).
*
* @param string $lang_dir Path to language files.
* @param string $domain Text domain.
* @param string $locale Locale being retrieved.
* @return array Combined translation chunk data.
*/
private function get_translation_chunk_data( $lang_dir, $domain, $locale ) {
// So long as this function is called during the 'upgrader_process_complete' action,
// the filesystem object should be hooked up.
global $wp_filesystem;
// Grab all JSON files in the current language pack.
$json_i18n_filenames = glob( $lang_dir . $domain . '-' . $locale . '-*.json' );
$combined_translation_data = array();
if ( false === $json_i18n_filenames ) {
return $combined_translation_data;
}
// Use first JSON file to determine file format. This check is required due to
// file format difference between official language files and user translated files.
$format_determine_file = reset( $json_i18n_filenames );
if ( ! $wp_filesystem->is_readable( $format_determine_file ) ) {
return $combined_translation_data;
}
$file_contents = $wp_filesystem->get_contents( $format_determine_file );
$format_determine_data = \json_decode( $file_contents, true );
if ( empty( $format_determine_data ) ) {
return $combined_translation_data;
}
if ( isset( $format_determine_data['comment'] ) ) {
return $this->combine_official_translation_chunks( $json_i18n_filenames );
} elseif ( isset( $format_determine_data['source'] ) ) {
return $this->combine_user_translation_chunks( $json_i18n_filenames );
} else {
return $combined_translation_data;
}
}
/**
* Combine and save translations for a specific locale.
*
* Note that this assumes \WP_Filesystem is already initialized with write access.
*
* @param string $language_dir Path to language files.
* @param string $plugin_domain Text domain.
* @param string $locale Locale being retrieved.
*/
private function build_and_save_translations( $language_dir, $plugin_domain, $locale ) {
global $wp_filesystem;
$translations_from_chunks = $this->get_translation_chunk_data( $language_dir, $plugin_domain, $locale );
if ( empty( $translations_from_chunks ) ) {
return;
}
$cache_filename = $this->get_combined_translation_filename( $plugin_domain, $locale );
$chunk_translations_json = wp_json_encode( $translations_from_chunks );
// Cache combined translations strings to a file.
$wp_filesystem->put_contents( $language_dir . $cache_filename, $chunk_translations_json );
}
/**
* Combine translation chunks when plugin is activated.
*
* This function combines JSON translation data auto-extracted by GlotPress
* from Webpack-generated JS chunks into a single file. This is necessary
* since the JS chunks are not known to WordPress via wp_register_script()
* and wp_set_script_translations().
*/
private function generate_translation_strings() {
$locale = determine_locale();
$lang_dir = WP_LANG_DIR . '/plugins/';
// Bail early if not localized.
if ( 'en_US' === $locale ) {
return;
}
if ( ! function_exists( 'get_filesystem_method' ) ) {
require_once ABSPATH . 'wp-admin/includes/file.php';
}
$access_type = get_filesystem_method();
if ( 'direct' === $access_type ) {
\WP_Filesystem();
$this->build_and_save_translations( $lang_dir, self::$plugin_domain, $locale );
} else {
// I'm reluctant to add support for other filesystems here as it would require
// user's input on activating plugin - which I don't think is common.
return;
}
}
/**
* Loads the required translation scripts on the correct pages.
*/
public function potentially_load_translation_script_file() {
if ( ! PageController::is_admin_or_embed_page() ) {
return;
}
// Grab translation strings from Webpack-generated chunks.
add_filter( 'load_script_translation_file', array( $this, 'load_script_translation_file' ), 10, 3 );
}
/**
* Load translation strings from language packs for dynamic imports.
*
* @param string $file File location for the script being translated.
* @param string $handle Script handle.
* @param string $domain Text domain.
*
* @return string New file location for the script being translated.
*/
public function load_script_translation_file( $file, $handle, $domain ) {
// Make sure the main app script is being loaded.
if ( WC_ADMIN_APP !== $handle ) {
return $file;
}
// Make sure we're handing the correct domain.
if ( self::$plugin_domain !== $domain ) {
return $file;
}
$locale = determine_locale();
$cache_filename = $this->get_combined_translation_filename( $domain, $locale );
return WP_LANG_DIR . '/plugins/' . $cache_filename;
}
/**
* Run when plugin is activated (can be WooCommerce or WooCommerce Admin).
*
* @param string $filename Activated plugin filename.
*/
public function potentially_generate_translation_strings( $filename ) {
$activated_plugin_domain = explode( '/', $filename )[0];
// Ensure we're only running only on activation hook that originates from our plugin.
if ( self::$plugin_domain === $activated_plugin_domain ) {
$this->generate_translation_strings();
}
}
/**
* Combine translation chunks when files are updated.
*
* This function combines JSON translation data auto-extracted by GlotPress
* from Webpack-generated JS chunks into a single file that can be used in
* subsequent requests. This is necessary since the JS chunks are not known
* to WordPress via wp_register_script() and wp_set_script_translations().
*
* @param Language_Pack_Upgrader $instance Upgrader instance.
* @param array $hook_extra Info about the upgraded language packs.
*/
public function combine_translation_chunk_files( $instance, $hook_extra ) {
if (
! is_a( $instance, 'Language_Pack_Upgrader' ) ||
! isset( $hook_extra['translations'] ) ||
! is_array( $hook_extra['translations'] )
) {
return;
}
$locales = array();
$language_dir = WP_LANG_DIR . '/plugins/';
// Gather the locales that were updated in this operation.
foreach ( $hook_extra['translations'] as $translation ) {
if (
'plugin' === $translation['type'] &&
self::$plugin_domain === $translation['slug']
) {
$locales[] = $translation['language'];
}
}
// Build combined translation files for all updated locales.
foreach ( $locales as $locale ) {
// So long as this function is hooked to the 'upgrader_process_complete' action,
// WP_Filesystem should be hooked up to be able to call build_and_save_translations.
$this->build_and_save_translations( $language_dir, self::$plugin_domain, $locale );
}
}
}