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<?php
declare(strict_types=1);
namespace Jfcherng\Diff\Utility;
final class Language
{
/**
* @var string[] the translation dict
*/
private $translations = [];
/**
* @var string the language name
*/
private $language = '_custom_';
/**
* The constructor.
*
* @param string|string[] $target the language string or translations dict
*/
public function __construct($target = 'eng')
{
$this->setLanguageOrTranslations($target);
}
/**
* Set up this class.
*
* @param string|string[] $target the language string or translations array
*
* @throws \InvalidArgumentException
*/
public function setLanguageOrTranslations($target): self
{
if (\is_string($target)) {
$this->setUpWithLanguage($target);
return $this;
}
if (\is_array($target)) {
$this->setUpWithTranslations($target);
return $this;
}
throw new \InvalidArgumentException('$target must be the type of string|string[]');
}
/**
* Get the language.
*
* @return string the language
*/
public function getLanguage(): string
{
return $this->language;
}
/**
* Get the translations.
*
* @return array the translations
*/
public function getTranslations(): array
{
return $this->translations;
}
/**
* Get the translations from the language file.
*
* @param string $language the language
*
* @throws \Exception fail to decode the JSON file
* @throws \LogicException path is a directory
* @throws \RuntimeException path cannot be opened
*
* @return string[]
*/
public static function getTranslationsByLanguage(string $language): array
{
$filePath = __DIR__ . "/../languages/{$language}.json";
$file = new \SplFileObject($filePath, 'r');
$fileContent = $file->fread($file->getSize());
/** @todo PHP ^7.3 JSON_THROW_ON_ERROR */
$decoded = \json_decode($fileContent, true);
if (\json_last_error() !== \JSON_ERROR_NONE) {
$msg = \sprintf('Fail to decode JSON file (code %d): %s', \json_last_error(), \realpath($filePath));
throw new \Exception($msg); // workaround single-line throw + 120-char limit
}
return (array) $decoded;
}
/**
* Translation the text.
*
* @param string $text the text
*/
public function translate(string $text): string
{
return $this->translations[$text] ?? "![{$text}]";
}
/**
* Set up this class by language name.
*
* @param string $language the language name
*/
private function setUpWithLanguage(string $language): self
{
return $this->setUpWithTranslations(
self::getTranslationsByLanguage($language),
$language
);
}
/**
* Set up this class by translations.
*
* @param string[] $translations the translations dict
* @param string $language the language name
*/
private function setUpWithTranslations(array $translations, string $language = '_custom_'): self
{
$this->language = $language;
$this->translations = \array_map('strval', $translations);
return $this;
}
}
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