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<?php |
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declare(strict_types=1); |
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namespace ReliqArts\DirectTranslator\Vocabulary; |
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use DomainException; |
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use Exception; |
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use ReliqArts\DirectTranslator\ConfigProvider; |
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use ReliqArts\DirectTranslator\Utility\RemoteFileAssistant; |
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use ReliqArts\DirectTranslator\Vocabulary as VocabularyContract; |
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use ReliqArts\DirectTranslator\Vocabulary\Exception\LoadingFailed; |
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use ReliqArts\DirectTranslator\VocabularyLoader; |
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final class Loader implements VocabularyLoader |
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{ |
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private const VOCAB_FILE_EXTENSION = 'json'; |
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/** |
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* @var ConfigProvider |
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*/ |
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private $configProvider; |
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/** |
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* @var RemoteFileAssistant |
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*/ |
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private $remoteFileAssistant; |
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/** |
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* @var Reader |
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*/ |
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private $reader; |
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/** |
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* @var Builder |
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*/ |
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private $builder; |
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/** |
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* VocabularyLoader constructor. |
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* |
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* @param ConfigProvider $configProvider |
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* @param RemoteFileAssistant $remoteFileAssistant |
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* @param Reader $reader |
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* @param Builder $builder |
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*/ |
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public function __construct( |
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ConfigProvider $configProvider, |
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RemoteFileAssistant $remoteFileAssistant, |
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Reader $reader, |
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Builder $builder |
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) { |
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$this->configProvider = $configProvider; |
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$this->remoteFileAssistant = $remoteFileAssistant; |
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$this->reader = $reader; |
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$this->builder = $builder; |
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} |
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/** |
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* @param string $key |
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* |
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* @throws LoadingFailed |
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* |
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* @return VocabularyContract |
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*/ |
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public function load(string $key): VocabularyContract |
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{ |
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try { |
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$filePath = $this->getVocabularyFilePath($key); |
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return $this->builder->create($this->reader->read($filePath)); |
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} catch (Exception $exception) { |
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throw new LoadingFailed( |
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sprintf('Could not load vocabulary by key: `%s`', $key), |
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$exception->getCode(), |
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$exception |
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); |
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} |
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} |
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/** |
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* @param string $key |
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* |
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* @throws DomainException |
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* |
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* @return null|string |
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*/ |
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private function getVocabularyFilePath(string $key): ?string |
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{ |
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$vocabularyDirectories = $this->configProvider->getVocabularyDirectories(); |
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foreach ($vocabularyDirectories as $directory) { |
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$path = sprintf('%s/%s.%s', $directory, $key, self::VOCAB_FILE_EXTENSION); |
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$vocabularyPath = realpath($path); |
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if (!empty($vocabularyPath)) { |
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return $vocabularyPath; |
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} |
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if ($this->pathIsUrl($path) && $this->remoteFileAssistant->fileExists($path)) { |
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return $path; |
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} |
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} |
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throw new DomainException( |
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sprintf('Vocabulary file not found for key: `%s`.', $key) |
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); |
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} |
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/** |
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* @param string $path |
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* |
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* @return bool |
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*/ |
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private function pathIsUrl(string $path): bool |
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{ |
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return !empty(filter_var($path, FILTER_VALIDATE_URL)); |
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} |
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} |
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Let?s assume that you have a directory layout like this:
and let?s assume the following content of
Bar.php
:If both files
OtherDir/Foo.php
andSomeDir/Foo.php
are loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.php
However, as
OtherDir/Foo.php
does not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php
, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: