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<?php |
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/** |
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* |
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* This file is part of the Aura Project for PHP. |
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* |
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* @package Aura.Intl |
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* @license http://opensource.org/licenses/MIT MIT |
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*/ |
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namespace Aura\Intl; |
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/** |
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* Translator to translate the message |
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* |
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* @package Aura.Intl |
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* |
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*/ |
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class Translator implements TranslatorInterface |
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{ |
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/** |
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* A fallback translator. |
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* @var TranslatorInterface |
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* |
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*/ |
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protected $fallback; |
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/** |
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* The formatter to use when translating messages. |
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* @var FormatterInterface |
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* |
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*/ |
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protected $formatter; |
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/** |
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* |
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* The locale being used for translations. |
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* @var string |
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*/ |
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protected $locale; |
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/** |
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* The Package containing keys and translations. |
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* @var Package |
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*/ |
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protected $package; |
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/** |
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* |
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* Constructor |
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* |
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* @param string $locale The locale being used. |
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* |
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* @param Package $package The Package containing keys and translations. |
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* |
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* @param FormatterInterface $formatter A message formatter. |
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* |
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* @param TranslatorInterface $fallback A fallback translator. |
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* |
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*/ |
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public function __construct( |
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$locale, |
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Package $package, |
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FormatterInterface $formatter, |
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TranslatorInterface $fallback = null |
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) { |
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$this->locale = $locale; |
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$this->package = $package; |
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$this->formatter = $formatter; |
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$this->fallback = $fallback; |
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} |
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/** |
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* Gets the message translation by its key. |
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* @param string $key The message key. |
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* @return mixed The message translation string, or false if not found. |
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* |
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*/ |
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protected function getMessage($key) |
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{ |
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$message = $this->package->getMessage($key); |
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if ($message) { |
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return $message; |
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} |
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if ($this->fallback) { |
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// get the message from the fallback translator |
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$message = $this->fallback->getMessage($key); |
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if ($message) { |
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// speed optimization: retain locally |
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$this->package->addMessage($key, $message); |
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// done! |
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return $message; |
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} |
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} |
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// no local message, no fallback |
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return false; |
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} |
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/** |
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* |
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* Translates the message indicated by they key, replacing token values |
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* along the way. |
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* |
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* @param string $key The message key. |
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* |
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* @param array $tokens_values Token values to interpolate into the |
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* message. |
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* |
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* @return string The translated message with tokens replaced. |
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* |
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*/ |
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public function translate($key, array $tokens_values = []) |
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{ |
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// get the message string |
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$message = $this->getMessage($key); |
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// do we have a message string? |
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if (! $message) { |
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// no, return the message key as-is |
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$message = $key; |
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} |
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// are there token replacement values? |
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if (! $tokens_values) { |
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// no, return the message string as-is |
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return $message; |
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} |
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// run message string through formatter to replace tokens with values |
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return $this->formatter->format($this->locale, $message, $tokens_values); |
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} |
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/** |
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* |
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* @return Package |
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* |
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*/ |
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public function getPackage() |
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{ |
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return $this->package; |
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} |
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} |
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In PHP, under loose comparison (like
==, or!=, orswitchconditions), values of different types might be equal.For
stringvalues, the empty string''is a special case, in particular the following results might be unexpected: