| 1 |
<?php |
| 2 |
/** |
| 3 |
* Define the internationalization functionality. |
| 4 |
* |
| 5 |
* Loads translations from jsDelivr CDN, downloading on-demand to the plugin's |
| 6 |
* languages folder. This bypasses WordPress.org translations entirely. |
| 7 |
* |
| 8 |
* @author Paul Kilmurray <paul@kilbot.com> |
| 9 |
* |
| 10 |
* @see http://wcpos.com |
| 11 |
* @package WCPOS\WooCommercePOS |
| 12 |
*/ |
| 13 |
|
| 14 |
namespace WCPOS\WooCommercePOS; |
| 15 |
|
| 16 |
use WCPOS\WooCommercePOS\Logger; |
| 17 |
use const WCPOS\WooCommercePOS\TRANSLATION_VERSION; |
| 18 |
|
| 19 |
/** |
| 20 |
* I18n class. |
| 21 |
* |
| 22 |
* Can be extended by pro plugin with different configuration. |
| 23 |
*/ |
| 24 |
class i18n { // phpcs:ignore PEAR.NamingConventions.ValidClassName.StartWithCapital, Generic.Classes.OpeningBraceSameLine.ContentAfterBrace |
| 25 |
|
| 26 |
private const CDN_BASE_URL = 'https://cdn.jsdelivr.net/gh/wcpos/translations@%s/translations/php/%s/%s-%s.l10n.php'; |
| 27 |
private const MISSING_LOCALE_CACHE_TTL = DAY_IN_SECONDS; |
| 28 |
private const WRITE_FAILED_CACHE_TTL = HOUR_IN_SECONDS; |
| 29 |
private const DOWNLOAD_LOCK_TTL = 30; |
| 30 |
|
| 31 |
/** |
| 32 |
* Text domain for the plugin. |
| 33 |
* |
| 34 |
* @var string |
| 35 |
*/ |
| 36 |
protected string $text_domain = 'woocommerce-pos'; |
| 37 |
|
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/** |
| 39 |
* Plugin version. |
| 40 |
* |
| 41 |
* @var string |
| 42 |
*/ |
| 43 |
protected string $version; |
| 44 |
|
| 45 |
/** |
| 46 |
* Path to the plugin's languages folder. |
| 47 |
* |
| 48 |
* @var string |
| 49 |
*/ |
| 50 |
protected string $languages_path; |
| 51 |
|
| 52 |
/** |
| 53 |
* Transient key prefix for caching. |
| 54 |
* |
| 55 |
* @var string |
| 56 |
*/ |
| 57 |
protected string $transient_key = 'wcpos_i18n_version'; |
| 58 |
|
| 59 |
/** |
| 60 |
* Most recent HTTP status code from translation download attempt. |
| 61 |
* |
| 62 |
* Null means the failure was not an HTTP status response (network/transport/write error). |
| 63 |
* |
| 64 |
* @var int|null |
| 65 |
*/ |
| 66 |
protected ?int $last_download_status_code = null; |
| 67 |
|
| 68 |
/** |
| 69 |
* Whether the last download attempt failed due to filesystem write errors. |
| 70 |
* |
| 71 |
* @var bool |
| 72 |
*/ |
| 73 |
protected bool $last_write_failed = false; |
| 74 |
|
| 75 |
/** |
| 76 |
* Load translations from jsDelivr. |
| 77 |
* |
| 78 |
* @param string|null $text_domain Optional text domain override. |
| 79 |
* @param string|null $version Optional version override. |
| 80 |
* @param string|null $languages_path Optional languages path override. |
| 81 |
*/ |
| 82 |
public function __construct( ?string $text_domain = null, ?string $version = null, ?string $languages_path = null ) { |
| 83 |
$this->text_domain = $text_domain ?? 'woocommerce-pos'; |
| 84 |
$this->version = $version ?? TRANSLATION_VERSION; |
| 85 |
$this->transient_key = 'wcpos_i18n_' . $this->text_domain; |
| 86 |
$this->languages_path = $languages_path ?? $this->resolve_languages_path(); |
| 87 |
|
| 88 |
$this->load_translations(); |
| 89 |
} |
| 90 |
|
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/** |
| 92 |
* Load translations directly from plugin's languages folder. |
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* Downloads from jsDelivr if not cached or version changed. |
| 94 |
*/ |
| 95 |
protected function load_translations(): void { |
| 96 |
$requested_locale = determine_locale(); |
| 97 |
|
| 98 |
// Skip English. |
| 99 |
if ( 'en_US' === $requested_locale || empty( $requested_locale ) ) { |
| 100 |
return; |
| 101 |
} |
| 102 |
|
| 103 |
$locale_candidates = $this->get_locale_candidates( $requested_locale ); |
| 104 |
$stale_file = null; |
| 105 |
$stale_locale = null; |
| 106 |
|
| 107 |
// Prefer an up-to-date local file, including base-language fallback. |
| 108 |
foreach ( $locale_candidates as $candidate_locale ) { |
| 109 |
$file = $this->languages_path . $this->text_domain . '-' . $candidate_locale . '.l10n.php'; |
| 110 |
$cached_version = get_transient( $this->transient_key . '_' . $candidate_locale ); |
| 111 |
|
| 112 |
if ( file_exists( $file ) && $this->version === $cached_version ) { |
| 113 |
delete_transient( $this->get_missing_locale_transient_key( $requested_locale ) ); |
| 114 |
$this->load_translation_file( $candidate_locale, $file ); |
| 115 |
|
| 116 |
return; |
| 117 |
} |
| 118 |
|
| 119 |
if ( file_exists( $file ) && null === $stale_file ) { |
| 120 |
$stale_file = $file; |
| 121 |
$stale_locale = $candidate_locale; |
| 122 |
} |
| 123 |
} |
| 124 |
|
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// Avoid repeated fetch attempts when we already know this locale is missing for this version. |
| 126 |
if ( get_transient( $this->get_missing_locale_transient_key( $requested_locale ) ) === $this->version ) { |
| 127 |
if ( $stale_file && $stale_locale ) { |
| 128 |
$this->load_translation_file( $stale_locale, $stale_file ); |
| 129 |
} |
| 130 |
|
| 131 |
return; |
| 132 |
} |
| 133 |
|
| 134 |
// Avoid repeated download attempts when filesystem is not writable. |
| 135 |
if ( get_transient( $this->get_write_failed_transient_key() ) === $this->version ) { |
| 136 |
if ( $stale_file && $stale_locale ) { |
| 137 |
$this->load_translation_file( $stale_locale, $stale_file ); |
| 138 |
} |
| 139 |
|
| 140 |
return; |
| 141 |
} |
| 142 |
|
| 143 |
// Prevent thundering herd: if another request is already downloading, skip. |
| 144 |
$download_lock_key = $this->get_download_lock_transient_key( $requested_locale ); |
| 145 |
if ( get_transient( $download_lock_key ) ) { |
| 146 |
if ( $stale_file && $stale_locale ) { |
| 147 |
$this->load_translation_file( $stale_locale, $stale_file ); |
| 148 |
} |
| 149 |
|
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return; |
| 151 |
} |
| 152 |
|
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// Acquire download lock before attempting HTTP requests. |
| 154 |
set_transient( $download_lock_key, true, self::DOWNLOAD_LOCK_TTL ); |
| 155 |
|
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try { |
| 157 |
$last_candidate_index = count( $locale_candidates ) - 1; |
| 158 |
$all_candidates_404 = true; |
| 159 |
foreach ( $locale_candidates as $index => $candidate_locale ) { |
| 160 |
$file = $this->languages_path . $this->text_domain . '-' . $candidate_locale . '.l10n.php'; |
| 161 |
$downloaded = $this->download_translation( $candidate_locale, $file, $index < $last_candidate_index ); |
| 162 |
|
| 163 |
if ( $downloaded ) { |
| 164 |
// Recompute file path — download_translation() may have switched to fallback path. |
| 165 |
$file = $this->languages_path . $this->text_domain . '-' . $candidate_locale . '.l10n.php'; |
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set_transient( $this->transient_key . '_' . $candidate_locale, $this->version, WEEK_IN_SECONDS ); |
| 167 |
delete_transient( $this->get_missing_locale_transient_key( $requested_locale ) ); |
| 168 |
delete_transient( $this->get_write_failed_transient_key() ); |
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$this->load_translation_file( $candidate_locale, $file ); |
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|
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return; |
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} |
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|
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if ( 404 !== $this->last_download_status_code ) { |
| 175 |
$all_candidates_404 = false; |
| 176 |
} |
| 177 |
} |
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|
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if ( $all_candidates_404 ) { |
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set_transient( $this->get_missing_locale_transient_key( $requested_locale ), $this->version, self::MISSING_LOCALE_CACHE_TTL ); |
| 181 |
} elseif ( $this->last_write_failed ) { |
| 182 |
set_transient( $this->get_write_failed_transient_key(), $this->version, self::WRITE_FAILED_CACHE_TTL ); |
| 183 |
} |
| 184 |
|
| 185 |
if ( $stale_file && $stale_locale ) { |
| 186 |
$this->load_translation_file( $stale_locale, $stale_file ); |
| 187 |
|
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return; |
| 189 |
} |
| 190 |
|
| 191 |
Logger::log( sprintf( 'i18n: No translation file available for %s (%s)', $this->text_domain, $requested_locale ) ); |
| 192 |
} finally { |
| 193 |
// Release download lock — runs even if an exception is thrown. |
| 194 |
delete_transient( $download_lock_key ); |
| 195 |
} |
| 196 |
} |
| 197 |
|
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/** |
| 199 |
* Get locale candidates in order of preference. |
| 200 |
* |
| 201 |
* For regional locales (e.g., da_DK), return both the full locale and the |
| 202 |
* base language fallback (da). |
| 203 |
* |
| 204 |
* @param string $locale Requested locale. |
| 205 |
* |
| 206 |
* @return string[] |
| 207 |
*/ |
| 208 |
protected function get_locale_candidates( string $locale ): array { |
| 209 |
$candidates = array( $locale ); |
| 210 |
|
| 211 |
if ( false !== strpos( $locale, '_' ) ) { |
| 212 |
$base_locale = explode( '_', $locale )[0]; |
| 213 |
if ( ! empty( $base_locale ) ) { |
| 214 |
$candidates[] = $base_locale; |
| 215 |
} |
| 216 |
} |
| 217 |
|
| 218 |
return array_values( array_unique( $candidates ) ); |
| 219 |
} |
| 220 |
|
| 221 |
/** |
| 222 |
* Load an existing translation file. |
| 223 |
* |
| 224 |
* @param string $locale Locale code for the file. |
| 225 |
* @param string $file Path to the l10n PHP file. |
| 226 |
*/ |
| 227 |
protected function load_translation_file( string $locale, string $file ): void { |
| 228 |
try { |
| 229 |
$this->maybe_convert_file_format( $file ); |
| 230 |
} catch ( \ParseError $e ) { |
| 231 |
// File is corrupt — delete it and clear the version transient so it re-downloads. |
| 232 |
Logger::log( sprintf( 'i18n: Corrupt translation file deleted (%s): %s', $file, $e->getMessage() ) ); |
| 233 |
wp_delete_file( $file ); |
| 234 |
delete_transient( $this->transient_key . '_' . $locale ); |
| 235 |
|
| 236 |
return; |
| 237 |
} |
| 238 |
|
| 239 |
// Pass the .mo path — WordPress internally looks for .l10n.php first. |
| 240 |
$mofile = $this->languages_path . $this->text_domain . '-' . $locale . '.mo'; |
| 241 |
load_textdomain( $this->text_domain, $mofile ); |
| 242 |
} |
| 243 |
|
| 244 |
/** |
| 245 |
* Build the transient key used for missing-locale caching. |
| 246 |
* |
| 247 |
* @param string $locale Requested locale. |
| 248 |
* |
| 249 |
* @return string |
| 250 |
*/ |
| 251 |
protected function get_missing_locale_transient_key( string $locale ): string { |
| 252 |
return $this->transient_key . '_missing_' . $locale; |
| 253 |
} |
| 254 |
|
| 255 |
/** |
| 256 |
* Get the fallback languages path using the uploads directory. |
| 257 |
* |
| 258 |
* Used when the primary languages path (WP_LANG_DIR/plugins/) is not writable. |
| 259 |
* The uploads directory is writable on any functioning WordPress install. |
| 260 |
* |
| 261 |
* @return string |
| 262 |
*/ |
| 263 |
protected function get_fallback_languages_path(): string { |
| 264 |
$upload_dir = wp_upload_dir(); |
| 265 |
|
| 266 |
return trailingslashit( $upload_dir['basedir'] ) . 'wcpos-languages/'; |
| 267 |
} |
| 268 |
|
| 269 |
/** |
| 270 |
* Build the transient key used for write-failure caching. |
| 271 |
* |
| 272 |
* @return string |
| 273 |
*/ |
| 274 |
protected function get_write_failed_transient_key(): string { |
| 275 |
return $this->transient_key . '_write_failed'; |
| 276 |
} |
| 277 |
|
| 278 |
/** |
| 279 |
* Build the transient key used for download-in-progress locking. |
| 280 |
* |
| 281 |
* @param string $locale Requested locale. |
| 282 |
* |
| 283 |
* @return string |
| 284 |
*/ |
| 285 |
protected function get_download_lock_transient_key( string $locale ): string { |
| 286 |
return $this->transient_key . '_downloading_' . $locale; |
| 287 |
} |
| 288 |
|
| 289 |
/** |
| 290 |
* Determine the languages path to use. |
| 291 |
* |
| 292 |
* Checks if a previous session fell back to the uploads directory and |
| 293 |
* returns that path if so. Otherwise returns the standard WordPress |
| 294 |
* languages/plugins/ directory. |
| 295 |
* |
| 296 |
* @return string |
| 297 |
*/ |
| 298 |
protected function resolve_languages_path(): string { |
| 299 |
$active = get_transient( $this->transient_key . '_active_path' ); |
| 300 |
if ( 'uploads' === $active ) { |
| 301 |
return $this->get_fallback_languages_path(); |
| 302 |
} |
| 303 |
|
| 304 |
return WP_LANG_DIR . '/plugins/'; |
| 305 |
} |
| 306 |
|
| 307 |
/** |
| 308 |
* Ensure .l10n.php file uses WordPress 6.5+ format with 'messages' key. |
| 309 |
* |
| 310 |
* CDN files use a flat array format, but WordPress expects: |
| 311 |
* array( 'messages' => array( 'key' => 'translation', ... ) ) |
| 312 |
* |
| 313 |
* @param string $file The .l10n.php file path. |
| 314 |
*/ |
| 315 |
protected function maybe_convert_file_format( string $file ): void { |
| 316 |
$data = include $file; |
| 317 |
|
| 318 |
if ( ! is_array( $data ) || isset( $data['messages'] ) ) { |
| 319 |
return; |
| 320 |
} |
| 321 |
|
| 322 |
// Wrap flat translations array in WordPress expected format. |
| 323 |
$wrapped = "<?php\nreturn array(\n\t'messages' => " . var_export( $data, true ) . ",\n);\n"; // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_var_export -- Generating a PHP translation file. |
| 324 |
|
| 325 |
global $wp_filesystem; |
| 326 |
if ( empty( $wp_filesystem ) ) { |
| 327 |
require_once ABSPATH . '/wp-admin/includes/file.php'; |
| 328 |
WP_Filesystem(); |
| 329 |
} |
| 330 |
|
| 331 |
if ( $wp_filesystem && is_object( $wp_filesystem ) ) { |
| 332 |
$wp_filesystem->put_contents( $file, $wrapped, $this->get_fs_chmod_file() ); |
| 333 |
} |
| 334 |
} |
| 335 |
|
| 336 |
/** |
| 337 |
* Resolve the file permission mode for translation writes. |
| 338 |
* |
| 339 |
* FS_CHMOD_FILE only exists once WP_Filesystem() has defined it. When the |
| 340 |
* runtime pre-populates $wp_filesystem without calling WP_Filesystem() |
| 341 |
* (WP-CLI does this), referencing the bare constant is a fatal error. |
| 342 |
* Mirror the fallback WordPress core uses when defining the constant. |
| 343 |
* |
| 344 |
* @return int |
| 345 |
*/ |
| 346 |
protected function get_fs_chmod_file(): int { |
| 347 |
if ( \defined( 'FS_CHMOD_FILE' ) ) { |
| 348 |
return FS_CHMOD_FILE; |
| 349 |
} |
| 350 |
|
| 351 |
// Core derives the file mode from a known file (ABSPATH is a directory, |
| 352 |
// so its mode carries execute bits that must not land on written files). |
| 353 |
return ( fileperms( ABSPATH . 'index.php' ) & 0777 ) | 0644; |
| 354 |
} |
| 355 |
|
| 356 |
/** |
| 357 |
* Write translation content to a file using WP_Filesystem. |
| 358 |
* |
| 359 |
* @param string $file The target file path. |
| 360 |
* @param string $body The file content to write. |
| 361 |
* |
| 362 |
* @return bool Whether the write was successful. |
| 363 |
*/ |
| 364 |
protected function write_translation_file( string $file, string $body ): bool { |
| 365 |
$dir = dirname( $file ); |
| 366 |
if ( ! is_dir( $dir ) ) { |
| 367 |
wp_mkdir_p( $dir ); |
| 368 |
} |
| 369 |
|
| 370 |
global $wp_filesystem; |
| 371 |
if ( empty( $wp_filesystem ) ) { |
| 372 |
require_once ABSPATH . '/wp-admin/includes/file.php'; |
| 373 |
WP_Filesystem(); |
| 374 |
} |
| 375 |
|
| 376 |
if ( ! $wp_filesystem || ! is_object( $wp_filesystem ) ) { |
| 377 |
return false; |
| 378 |
} |
| 379 |
|
| 380 |
if ( ! $wp_filesystem->put_contents( $file, $body, $this->get_fs_chmod_file() ) ) { |
| 381 |
return false; |
| 382 |
} |
| 383 |
|
| 384 |
// Verify the write was complete (catches partial/truncated writes). |
| 385 |
$written_size = $wp_filesystem->size( $file ); |
| 386 |
if ( false === $written_size || strlen( $body ) !== $written_size ) { |
| 387 |
Logger::log( sprintf( 'i18n: Write verification failed — expected %d bytes, got %s', strlen( $body ), var_export( $written_size, true ) ) ); // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_var_export -- Logging diagnostic info. |
| 388 |
wp_delete_file( $file ); |
| 389 |
|
| 390 |
return false; |
| 391 |
} |
| 392 |
|
| 393 |
return true; |
| 394 |
} |
| 395 |
|
| 396 |
/** |
| 397 |
* Download a translation file from jsDelivr. |
| 398 |
* |
| 399 |
* Tries writing to the primary languages path first. If that fails, |
| 400 |
* falls back to the uploads directory. If both fail, sets |
| 401 |
* $last_write_failed so the caller can cache the failure. |
| 402 |
* |
| 403 |
* @param string $locale The locale code (e.g., de_DE). |
| 404 |
* @param string $file The target file path. |
| 405 |
* @param bool $suppress_404_logs Suppress 404 logging for fallback attempts. |
| 406 |
* |
| 407 |
* @return bool Whether the download and write was successful. |
| 408 |
*/ |
| 409 |
protected function download_translation( string $locale, string $file, bool $suppress_404_logs = false ): bool { |
| 410 |
$url = sprintf( self::CDN_BASE_URL, $this->version, $locale, $this->text_domain, $locale ); |
| 411 |
$this->last_download_status_code = null; |
| 412 |
$this->last_write_failed = false; |
| 413 |
|
| 414 |
$response = wp_remote_get( |
| 415 |
$url, |
| 416 |
array( |
| 417 |
'timeout' => 10, |
| 418 |
) |
| 419 |
); |
| 420 |
|
| 421 |
if ( is_wp_error( $response ) ) { |
| 422 |
Logger::log( sprintf( 'i18n: Failed to download %s translation - HTTP error: %s', $locale, $response->get_error_message() ) ); |
| 423 |
|
| 424 |
return false; |
| 425 |
} |
| 426 |
|
| 427 |
$status_code = wp_remote_retrieve_response_code( $response ); |
| 428 |
if ( 200 !== $status_code ) { |
| 429 |
$this->last_download_status_code = $status_code; |
| 430 |
|
| 431 |
if ( ! ( $suppress_404_logs && 404 === $status_code ) ) { |
| 432 |
Logger::log( sprintf( 'i18n: Failed to download %s translation - HTTP %d from %s', $locale, $status_code, $url ) ); |
| 433 |
} |
| 434 |
|
| 435 |
return false; |
| 436 |
} |
| 437 |
|
| 438 |
$body = wp_remote_retrieve_body( $response ); |
| 439 |
if ( empty( $body ) ) { |
| 440 |
Logger::log( sprintf( 'i18n: Failed to download %s translation - empty response body from %s', $locale, $url ) ); |
| 441 |
|
| 442 |
return false; |
| 443 |
} |
| 444 |
|
| 445 |
// Validate the response is a PHP translation file (catches truncated downloads). |
| 446 |
if ( 0 !== strpos( $body, '<?php' ) || false === strpos( $body, 'return' ) ) { |
| 447 |
Logger::log( sprintf( 'i18n: Downloaded %s translation is not valid PHP — possible truncated download from %s', $locale, $url ) ); |
| 448 |
|
| 449 |
return false; |
| 450 |
} |
| 451 |
|
| 452 |
// Try writing to primary path. |
| 453 |
if ( $this->write_translation_file( $file, $body ) ) { |
| 454 |
return true; |
| 455 |
} |
| 456 |
|
| 457 |
// Primary write failed — try uploads fallback. |
| 458 |
$fallback_path = $this->get_fallback_languages_path(); |
| 459 |
if ( $fallback_path !== $this->languages_path ) { |
| 460 |
$fallback_file = $fallback_path . basename( $file ); |
| 461 |
if ( $this->write_translation_file( $fallback_file, $body ) ) { |
| 462 |
Logger::log( sprintf( 'i18n: Primary path not writable, using fallback for %s translations: %s', $locale, $fallback_path ) ); |
| 463 |
$this->languages_path = $fallback_path; |
| 464 |
set_transient( $this->transient_key . '_active_path', 'uploads', MONTH_IN_SECONDS ); |
| 465 |
|
| 466 |
return true; |
| 467 |
} |
| 468 |
} |
| 469 |
|
| 470 |
// Both paths failed (or already at fallback and it failed). |
| 471 |
$this->last_write_failed = true; |
| 472 |
Logger::log( sprintf( 'i18n: Failed to write %s translation to any writable location', $locale ) ); |
| 473 |
|
| 474 |
return false; |
| 475 |
} |
| 476 |
} |
| 477 |
|
