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<?php |
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declare(strict_types=1); |
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namespace Charcoal\View\Mustache; |
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use LogicException; |
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// From Mustache |
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use Mustache_LambdaHelper as LambdaHelper; |
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// From 'charcoal-translator' |
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use Charcoal\Translator\Translator; |
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// From 'charcoal-view' |
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use Charcoal\View\Mustache\HelpersInterface; |
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/** |
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* Translating Mustache Templates |
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*/ |
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class TranslatorHelpers implements HelpersInterface |
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{ |
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/** |
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* Store the translator service. |
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* |
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* @var Translator|null |
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*/ |
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private $translator; |
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/** |
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* Store the given number to use to find the indice of the message (Mustache tag node). |
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* |
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* This can be a variable name in the context stack or an integer. |
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* |
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* Floats are not supported due to their decimal symbol conflicting |
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* with Mustache's dot-notation. |
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* |
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* @var string|integer|null |
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*/ |
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private $number; |
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/** |
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* Store the given locale (Mustache tag node). |
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* |
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* This must be an available locale on the Translator. |
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* |
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* @var string|null |
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*/ |
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private $locale; |
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/** |
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* Store the given domain for the message (Mustache tag node). |
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* |
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* This must be an available domain on the Translator. |
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* |
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* @var string|null |
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*/ |
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private $domain; |
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/** |
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* @param array $data Class Dependencies. |
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*/ |
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public function __construct(array $data = null) |
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{ |
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if (isset($data['translator'])) { |
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$this->setTranslator($data['translator']); |
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} |
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} |
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/** |
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* Set the translator service. |
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* |
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* @param Translator $translator The Translator service. |
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* @return void |
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*/ |
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protected function setTranslator(Translator $translator): void |
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{ |
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$this->translator = $translator; |
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} |
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/** |
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* Retrieve the helpers. |
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* |
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* @return array |
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*/ |
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public function toArray(): array |
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{ |
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return [ |
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'_t' => $this, |
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]; |
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} |
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/** |
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* Clear macros. |
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* |
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* @return void |
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*/ |
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protected function reset(): void |
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{ |
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$this->number = null; |
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$this->domain = null; |
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$this->locale = null; |
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} |
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/** |
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* Magic: Render the Mustache section. |
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* |
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* @param string $text The translation key. |
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* @param LambdaHelper|null $helper For rendering strings in the current context. |
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* @return string |
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*/ |
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public function __invoke(string $text, LambdaHelper $helper = null): string |
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{ |
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if ($this->translator) { |
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if ($this->number === null) { |
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$text = $this->translator->trans($text, [], $this->domain, $this->locale); |
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} else { |
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if (!is_numeric($this->number) && is_string($this->number)) { |
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$this->number = $helper->render('{{ '.$this->number.' }}'); |
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} |
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$text = $this->translator->transChoice($text, (int)$this->number, [], $this->domain, $this->locale); |
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} |
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$this->reset(); |
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} |
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/** @var string Render any Mustache tags in the translation. */ |
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return $helper->render($text); |
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} |
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/** |
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* Magic: Determine if a property is set and is not NULL. |
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* |
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* Required by Mustache. |
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* |
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* @param string $macro A domain, locale, or number. |
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* @return boolean |
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*/ |
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public function __isset(string $macro): bool |
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{ |
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return boolval($macro); |
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} |
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/** |
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* Magic: Process domain, locale, and number. |
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* |
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* Required by Mustache. |
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* |
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* @param string $macro A domain, locale, or number. |
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* @throws LogicException If the macro is unresolved. |
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* @return mixed |
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*/ |
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public function __get(string $macro) |
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{ |
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if (!$this->translator) { |
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return $this; |
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} |
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if ($this->locale === null && in_array($macro, $this->translator->availableLocales())) { |
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$this->locale = $macro; |
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return $this; |
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} |
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if ($this->domain === null && in_array($macro, $this->translator->availableDomains())) { |
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$this->domain = $macro; |
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return $this; |
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} |
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if ($this->number === null) { |
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$this->number = $macro; |
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return $this; |
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} |
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throw new LogicException(sprintf('Unknown translator macro: %s', $macro)); |
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} |
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} |
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If a variable is not always an object, we recommend to add an additional type check to ensure your method call is safe: