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<?php
/**
* I18N: WP_Translation_Controller class.
*
* @package WordPress
* @subpackage I18N
* @since 6.5.0
*/
/**
* Class WP_Translation_Controller.
*
* @since 6.5.0
*/
final class WP_Translation_Controller {
/**
* Current locale.
*
* @since 6.5.0
* @var string
*/
protected $current_locale = 'en_US';
/**
* Map of loaded translations per locale and text domain.
*
* [ Locale => [ Textdomain => [ ..., ... ] ] ]
*
* @since 6.5.0
* @var array<string, array<string, WP_Translation_File[]>>
*/
protected $loaded_translations = array();
/**
* List of loaded translation files.
*
* [ Filename => [ Locale => [ Textdomain => WP_Translation_File ] ] ]
*
* @since 6.5.0
* @var array<string, array<string, array<string, WP_Translation_File|false>>>
*/
protected $loaded_files = array();
/**
* Container for the main instance of the class.
*
* @since 6.5.0
* @var WP_Translation_Controller|null
*/
private static $instance = null;
/**
* Utility method to retrieve the main instance of the class.
*
* The instance will be created if it does not exist yet.
*
* @since 6.5.0
*
* @return WP_Translation_Controller
*/
public static function get_instance(): WP_Translation_Controller {
if ( null === self::$instance ) {
self::$instance = new self();
}
return self::$instance;
}
/**
* Returns the current locale.
*
* @since 6.5.0
*
* @return string Locale.
*/
public function get_locale(): string {
return $this->current_locale;
}
/**
* Sets the current locale.
*
* @since 6.5.0
*
* @param string $locale Locale.
*/
public function set_locale( string $locale ) {
$this->current_locale = $locale;
}
/**
* Loads a translation file for a given text domain.
*
* @since 6.5.0
*
* @param string $translation_file Translation file.
* @param string $textdomain Optional. Text domain. Default 'default'.
* @param string $locale Optional. Locale. Default current locale.
* @return bool True on success, false otherwise.
*/
public function load_file( string $translation_file, string $textdomain = 'default', ?string $locale = null ): bool {
if ( null === $locale ) {
$locale = $this->current_locale;
}
$translation_file = realpath( $translation_file );
if ( false === $translation_file ) {
return false;
}
if (
isset( $this->loaded_files[ $translation_file ][ $locale ][ $textdomain ] ) &&
false !== $this->loaded_files[ $translation_file ][ $locale ][ $textdomain ]
) {
return null === $this->loaded_files[ $translation_file ][ $locale ][ $textdomain ]->error();
}
if (
isset( $this->loaded_files[ $translation_file ][ $locale ] ) &&
array() !== $this->loaded_files[ $translation_file ][ $locale ]
) {
$moe = reset( $this->loaded_files[ $translation_file ][ $locale ] );
} else {
$moe = WP_Translation_File::create( $translation_file );
if ( false === $moe || null !== $moe->error() ) {
$moe = false;
}
}
$this->loaded_files[ $translation_file ][ $locale ][ $textdomain ] = $moe;
if ( ! $moe instanceof WP_Translation_File ) {
return false;
}
if ( ! isset( $this->loaded_translations[ $locale ][ $textdomain ] ) ) {
$this->loaded_translations[ $locale ][ $textdomain ] = array();
}
$this->loaded_translations[ $locale ][ $textdomain ][] = $moe;
return true;
}
/**
* Unloads a translation file for a given text domain.
*
* @since 6.5.0
*
* @param WP_Translation_File|string $file Translation file instance or file name.
* @param string $textdomain Optional. Text domain. Default 'default'.
* @param string $locale Optional. Locale. Defaults to all locales.
* @return bool True on success, false otherwise.
*/
public function unload_file( $file, string $textdomain = 'default', ?string $locale = null ): bool {
if ( is_string( $file ) ) {
$file = realpath( $file );
}
if ( null !== $locale ) {
if ( isset( $this->loaded_translations[ $locale ][ $textdomain ] ) ) {
foreach ( $this->loaded_translations[ $locale ][ $textdomain ] as $i => $moe ) {
if ( $file === $moe || $file === $moe->get_file() ) {
unset( $this->loaded_translations[ $locale ][ $textdomain ][ $i ] );
unset( $this->loaded_files[ $moe->get_file() ][ $locale ][ $textdomain ] );
return true;
}
}
}
return true;
}
foreach ( $this->loaded_translations as $l => $domains ) {
if ( ! isset( $domains[ $textdomain ] ) ) {
continue;
}
foreach ( $domains[ $textdomain ] as $i => $moe ) {
if ( $file === $moe || $file === $moe->get_file() ) {
unset( $this->loaded_translations[ $l ][ $textdomain ][ $i ] );
unset( $this->loaded_files[ $moe->get_file() ][ $l ][ $textdomain ] );
return true;
}
}
}
return false;
}
/**
* Unloads all translation files for a given text domain.
*
* @since 6.5.0
*
* @param string $textdomain Optional. Text domain. Default 'default'.
* @param string $locale Optional. Locale. Defaults to all locales.
* @return bool True on success, false otherwise.
*/
public function unload_textdomain( string $textdomain = 'default', ?string $locale = null ): bool {
$unloaded = false;
if ( null !== $locale ) {
if ( isset( $this->loaded_translations[ $locale ][ $textdomain ] ) ) {
$unloaded = true;
foreach ( $this->loaded_translations[ $locale ][ $textdomain ] as $moe ) {
unset( $this->loaded_files[ $moe->get_file() ][ $locale ][ $textdomain ] );
}
}
unset( $this->loaded_translations[ $locale ][ $textdomain ] );
return $unloaded;
}
foreach ( $this->loaded_translations as $l => $domains ) {
if ( ! isset( $domains[ $textdomain ] ) ) {
continue;
}
$unloaded = true;
foreach ( $domains[ $textdomain ] as $moe ) {
unset( $this->loaded_files[ $moe->get_file() ][ $l ][ $textdomain ] );
}
unset( $this->loaded_translations[ $l ][ $textdomain ] );
}
return $unloaded;
}
/**
* Determines whether translations are loaded for a given text domain.
*
* @since 6.5.0
*
* @param string $textdomain Optional. Text domain. Default 'default'.
* @param string $locale Optional. Locale. Default current locale.
* @return bool True if there are any loaded translations, false otherwise.
*/
public function is_textdomain_loaded( string $textdomain = 'default', ?string $locale = null ): bool {
if ( null === $locale ) {
$locale = $this->current_locale;
}
return isset( $this->loaded_translations[ $locale ][ $textdomain ] ) &&
array() !== $this->loaded_translations[ $locale ][ $textdomain ];
}
/**
* Translates a singular string.
*
* @since 6.5.0
*
* @param string $text Text to translate.
* @param string $context Optional. Context for the string. Default empty string.
* @param string $textdomain Optional. Text domain. Default 'default'.
* @param string $locale Optional. Locale. Default current locale.
* @return string|false Translation on success, false otherwise.
*/
public function translate( string $text, string $context = '', string $textdomain = 'default', ?string $locale = null ) {
if ( '' !== $context ) {
$context .= "\4";
}
$translation = $this->locate_translation( "{$context}{$text}", $textdomain, $locale );
if ( false === $translation ) {
return false;
}
return $translation['entries'][0];
}
/**
* Translates plurals.
*
* Checks both singular+plural combinations as well as just singulars,
* in case the translation file does not store the plural.
*
* @since 6.5.0
*
* @param array $plurals {
* Pair of singular and plural translations.
*
* @type string $0 Singular translation.
* @type string $1 Plural translation.
* }
* @param int $number Number of items.
* @param string $context Optional. Context for the string. Default empty string.
* @param string $textdomain Optional. Text domain. Default 'default'.
* @param string|null $locale Optional. Locale. Default current locale.
* @return string|false Translation on success, false otherwise.
*/
public function translate_plural( array $plurals, int $number, string $context = '', string $textdomain = 'default', ?string $locale = null ) {
if ( '' !== $context ) {
$context .= "\4";
}
$text = implode( "\0", $plurals );
$translation = $this->locate_translation( "{$context}{$text}", $textdomain, $locale );
if ( false === $translation ) {
$text = $plurals[0];
$translation = $this->locate_translation( "{$context}{$text}", $textdomain, $locale );
if ( false === $translation ) {
return false;
}
}
/** @var WP_Translation_File $source */
$source = $translation['source'];
$num = $source->get_plural_form( $number );
// See \Translations::translate_plural().
return $translation['entries'][ $num ] ?? $translation['entries'][0];
}
/**
* Returns all existing headers for a given text domain.
*
* @since 6.5.0
*
* @param string $textdomain Optional. Text domain. Default 'default'.
* @return array<string, string> Headers.
*/
public function get_headers( string $textdomain = 'default' ): array {
if ( array() === $this->loaded_translations ) {
return array();
}
$headers = array();
foreach ( $this->get_files( $textdomain ) as $moe ) {
foreach ( $moe->headers() as $header => $value ) {
$headers[ $this->normalize_header( $header ) ] = $value;
}
}
return $headers;
}
/**
* Normalizes header names to be capitalized.
*
* @since 6.5.0
*
* @param string $header Header name.
* @return string Normalized header name.
*/
protected function normalize_header( string $header ): string {
$parts = explode( '-', $header );
$parts = array_map( 'ucfirst', $parts );
return implode( '-', $parts );
}
/**
* Returns all entries for a given text domain.
*
* @since 6.5.0
*
* @param string $textdomain Optional. Text domain. Default 'default'.
* @return array<string, string> Entries.
*/
public function get_entries( string $textdomain = 'default' ): array {
if ( array() === $this->loaded_translations ) {
return array();
}
$entries = array();
foreach ( $this->get_files( $textdomain ) as $moe ) {
$entries = array_merge( $entries, $moe->entries() );
}
return $entries;
}
/**
* Locates translation for a given string and text domain.
*
* @since 6.5.0
*
* @param string $singular Singular translation.
* @param string $textdomain Optional. Text domain. Default 'default'.
* @param string $locale Optional. Locale. Default current locale.
* @return array{source: WP_Translation_File, entries: string[]}|false {
* Translations on success, false otherwise.
*
* @type WP_Translation_File $source Translation file instance.
* @type string[] $entries Array of translation entries.
* }
*/
protected function locate_translation( string $singular, string $textdomain = 'default', ?string $locale = null ) {
if ( array() === $this->loaded_translations ) {
return false;
}
// Find the translation in all loaded files for this text domain.
foreach ( $this->get_files( $textdomain, $locale ) as $moe ) {
$translation = $moe->translate( $singular );
if ( false !== $translation ) {
return array(
'entries' => explode( "\0", $translation ),
'source' => $moe,
);
}
if ( null !== $moe->error() ) {
// Unload this file, something is wrong.
$this->unload_file( $moe, $textdomain, $locale );
}
}
// Nothing could be found.
return false;
}
/**
* Returns all translation files for a given text domain.
*
* @since 6.5.0
*
* @param string $textdomain Optional. Text domain. Default 'default'.
* @param string $locale Optional. Locale. Default current locale.
* @return WP_Translation_File[] List of translation files.
*/
protected function get_files( string $textdomain = 'default', ?string $locale = null ): array {
if ( null === $locale ) {
$locale = $this->current_locale;
}
return $this->loaded_translations[ $locale ][ $textdomain ] ?? array();
}
/**
* Returns a boolean to indicate whether a translation exists for a given string with optional text domain and locale.
*
* @since 6.7.0
*
* @param string $singular Singular translation to check.
* @param string $textdomain Optional. Text domain. Default 'default'.
* @param ?string $locale Optional. Locale. Default current locale.
* @return bool True if the translation exists, false otherwise.
*/
public function has_translation( string $singular, string $textdomain = 'default', ?string $locale = null ): bool {
if ( null === $locale ) {
$locale = $this->current_locale;
}
return false !== $this->locate_translation( $singular, $textdomain, $locale );
}
}