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<?php /** * I18N: WP_Translation_File class. * * @package WordPress * @subpackage I18N * @since 6.5.0 / /* * Class WP_Translation_File. * * @since 6.5.0 / abstract class WP_Translation_File { /* * List of headers. * * @since 6.5.0 * @var array<string, string> / protected $headers = array(); /* * Whether file has been parsed. * * @since 6.5.0 * @var bool / protected $parsed = false; /* * Error information. * * @since 6.5.0 * @var string\|null Error message or null if no error. / protected $error; /* * File name. * * @since 6.5.0 * @var string / protected $file = ''; /* * Translation entries. * * @since 6.5.0 * @var array<string, string> / protected $entries = array(); /* * Plural forms function. * * @since 6.5.0 * @var callable\|null Plural forms. / protected $plural_forms = null; /* * Constructor. * * @since 6.5.0 * * @param string $file File to load. / protected function __construct( string $file ) { $this->file = $file; } /* * Creates a new WP_Translation_File instance for a given file. * * @since 6.5.0 * * @param string $file File name. * @param string\|null $filetype Optional. File type. Default inferred from file name. * @return false\|WP_Translation_File / public static function create( string $file, ?string $filetype = null ) { if ( ! is_readable( $file ) ) { return false; } if ( null === $filetype ) { $pos = strrpos( $file, '.' ); if ( false !== $pos ) { $filetype = substr( $file, $pos + 1 ); } } switch ( $filetype ) { case 'mo': return new WP_Translation_File_MO( $file ); case 'php': return new WP_Translation_File_PHP( $file ); default: return false; } } /* * Creates a new WP_Translation_File instance for a given file. * * @since 6.5.0 * * @param string $file Source file name. * @param string $filetype Desired target file type. * @return string\|false Transformed translation file contents on success, false otherwise. / public static function transform( string $file, string $filetype ) { $source = self::create( $file ); if ( false === $source ) { return false; } switch ( $filetype ) { case 'mo': $destination = new WP_Translation_File_MO( '' ); break; case 'php': $destination = new WP_Translation_File_PHP( '' ); break; default: return false; } $success = $destination->import( $source ); if ( ! $success ) { return false; } return $destination->export(); } /* * Returns all headers. * * @since 6.5.0 * * @return array<string, string> Headers. / public function headers(): array { if ( ! $this->parsed ) { $this->parse_file(); } return $this->headers; } /* * Returns all entries. * * @since 6.5.0 * * @return array<string, string[]> Entries. / public function entries(): array { if ( ! $this->parsed ) { $this->parse_file(); } return $this->entries; } /* * Returns the current error information. * * @since 6.5.0 * * @return string\|null Error message or null if no error. / public function error() { return $this->error; } /* * Returns the file name. * * @since 6.5.0 * * @return string File name. / public function get_file(): string { return $this->file; } /* * Translates a given string. * * @since 6.5.0 * * @param string $text String to translate. * @return false\|string Translation(s) on success, false otherwise. / public function translate( string $text ) { if ( ! $this->parsed ) { $this->parse_file(); } return $this->entries[ $text ] ?? false; } /* * Returns the plural form for a given number. * * @since 6.5.0 * * @param int $number Count. * @return int Plural form. / public function get_plural_form( int $number ): int { if ( ! $this->parsed ) { $this->parse_file(); } if ( null === $this->plural_forms && isset( $this->headers['plural-forms'] ) ) { $expression = $this->get_plural_expression_from_header( $this->headers['plural-forms'] ); $this->plural_forms = $this->make_plural_form_function( $expression ); } if ( is_callable( $this->plural_forms ) ) { /* * Plural form. * * @var int $result Plural form. / $result = call_user_func( $this->plural_forms, $number ); return $result; } // Default plural form matches English, only "One" is considered singular. return ( 1 === $number ? 0 : 1 ); } /* * Returns the plural forms expression as a tuple. * * @since 6.5.0 * * @param string $header Plural-Forms header string. * @return string Plural forms expression. / protected function get_plural_expression_from_header( string $header ): string { if ( preg_match( '/^\snplurals\s=\s(\d+)\s;\s+plural\s=\s(.+)$/', $header, $matches ) ) { return trim( $matches[2] ); } return 'n != 1'; } /* * Makes a function, which will return the right translation index, according to the * plural forms header. * * @since 6.5.0 * * @param string $expression Plural form expression. * @return callable(int $num): int Plural forms function. / protected function make_plural_form_function( string $expression ): callable { try { $handler = new Plural_Forms( rtrim( $expression, ';' ) ); return array( $handler, 'get' ); } catch ( Exception $e ) { // Fall back to default plural-form function. return $this->make_plural_form_function( 'n != 1' ); } } /* * Imports translations from another file. * * @since 6.5.0 * * @param WP_Translation_File $source Source file. * @return bool True on success, false otherwise. / protected function import( WP_Translation_File $source ): bool { if ( null !== $source->error() ) { return false; } $this->headers = $source->headers(); $this->entries = $source->entries(); $this->error = $source->error(); return null === $this->error; } /* * Parses the file. * * @since 6.5.0 / abstract protected function parse_file(); /* * Exports translation contents as a string. * * @since 6.5.0 * * @return string Translation file contents. */ abstract public function export(); }