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MessageGroupConfigurationParser.php
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MessageGroupConfigurationParser.php
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<?php
declare( strict_types = 1 );
namespace MediaWiki\Extension\Translate\MessageGroupConfiguration;
use AggregateMessageGroup;
use Exception;
use MediaWiki\Extension\Translate\FileFormatSupport\FileFormatFactory;
use MediaWiki\Extension\Translate\MessageProcessing\StringMatcher;
use MediaWiki\Extension\Translate\Services;
use MediaWiki\Extension\Translate\Utilities\Yaml;
use RomaricDrigon\MetaYaml\MetaYaml;
/**
* Utility class to parse and validate message group configurations.
* @author Niklas Laxström
* @license GPL-2.0-or-later
*/
class MessageGroupConfigurationParser {
private ?array $baseSchema = null;
private FileFormatFactory $fileFormatFactory;
public function __construct() {
// Don't perform validations if library not available
if ( class_exists( MetaYaml::class ) ) {
$this->baseSchema = $this->getBaseSchema();
}
$this->fileFormatFactory = Services::getInstance()->getFileFormatFactory();
}
/**
* Easy to use function to get valid group configurations from YAML. Those not matching
* schema will be ignored, if schema validation is enabled.
*
* @param string $data Yaml
* @param callable|null $callback Optional callback which is called on errors. Parameters are
* document index, processed configuration and error message.
* @return array Group configurations indexed by message group id.
*/
public function getHopefullyValidConfigurations( string $data, ?callable $callback = null ): array {
if ( !is_callable( $callback ) ) {
$callback = static function ( $unused1, $unused2, $unused3 ) {
/*noop*/
};
}
$documents = self::getDocumentsFromYaml( $data );
$configurations = self::parseDocuments( $documents );
$groups = [];
if ( is_array( $this->baseSchema ) ) {
foreach ( $configurations as $index => $config ) {
try {
$this->validate( $config );
$groups[$config['BASIC']['id']] = $config;
} catch ( Exception $e ) {
$callback( $index, $config, $e->getMessage() );
}
}
} else {
foreach ( $configurations as $index => $config ) {
if ( isset( $config['BASIC']['id'] ) ) {
$groups[$config['BASIC']['id']] = $config;
} else {
$callback( $index, $config, 'id is missing' );
}
}
}
return $groups;
}
/**
* Given a Yaml string, returns the non-empty documents as an array.
* @return string[]
*/
public function getDocumentsFromYaml( string $data ): array {
return preg_split( "/^---$/m", $data, -1, PREG_SPLIT_NO_EMPTY );
}
/**
* Returns group configurations from YAML documents. If there is document containing template,
* it will be merged with other configurations.
*
* @return array[][] Unvalidated group configurations
*/
public function parseDocuments( array $documents ): array {
$groups = [];
$template = [];
foreach ( $documents as $document ) {
$document = Yaml::loadString( $document );
if ( isset( $document['TEMPLATE'] ) ) {
$template = $document['TEMPLATE'];
} else {
$groups[] = $document;
}
}
if ( $template ) {
foreach ( $groups as $i => $group ) {
$groups[$i] = self::mergeTemplate( $template, $group );
// Little hack to allow aggregate groups to be defined in same file with other groups.
if ( $groups[$i]['BASIC']['class'] === AggregateMessageGroup::class ) {
unset( $groups[$i]['FILES'] );
}
}
}
return $groups;
}
public function getBaseSchema(): array {
return Yaml::load( __DIR__ . '/../../data/group-yaml-schema.yaml' );
}
/**
* Validates group configuration against schema.
* @throws Exception If configuration is not valid.
*/
public function validate( array $config ): void {
$schema = $this->baseSchema;
foreach ( $config as $key => $section ) {
$extra = [];
if ( $key === 'FILES' ) {
$extra = $this->getFilesSchemaExtra( $section );
} elseif ( $key === 'MANGLER' ) {
$class = $section[ 'class' ] ?? null;
// FIXME: UGLY HACK: StringMatcher is now under a namespace so use the fully prefixed
// class to check if it has the getExtraSchema method
if ( $class === 'StringMatcher' ) {
$extra = StringMatcher::getExtraSchema();
}
} else {
$extra = $this->callGetExtraSchema( $section[ 'class' ] ?? null );
}
$schema = array_replace_recursive( $schema, $extra );
}
$schema = new MetaYaml( $schema );
$schema->validate( $config );
}
/** Merges a document template (base) to actual definition (specific) */
public static function mergeTemplate( array $base, array $specific ): array {
foreach ( $specific as $key => $value ) {
if ( is_array( $value ) && isset( $base[$key] ) && is_array( $base[$key] ) ) {
$base[$key] = self::mergeTemplate( $base[$key], $value );
} else {
$base[$key] = $value;
}
}
return $base;
}
private function getFilesSchemaExtra( array $section ): array {
$class = $section['class'] ?? null;
$format = $section['format'] ?? null;
$className = null;
if ( $format ) {
$className = $this->fileFormatFactory->getClassname( $format );
} elseif ( $class ) {
$className = $class;
}
return $this->callGetExtraSchema( $className );
}
private function callGetExtraSchema( ?string $className ): array {
if ( $className && is_callable( [ $className, 'getExtraSchema' ] ) ) {
return call_user_func( [ $className, 'getExtraSchema' ] );
}
return [];
}
}

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MessageGroupConfigurationParser.php (5 KB)

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