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<?php |
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namespace CultuurNet\UDB3\ValueObject; |
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use CultuurNet\UDB3\Language; |
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use CultuurNet\UDB3\Model\ValueObject\Translation\TranslatedValueObject; |
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use ValueObjects\StringLiteral\StringLiteral; |
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class MultilingualString |
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{ |
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/** |
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* @var Language |
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*/ |
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private $originalLanguage; |
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/** |
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* @var StringLiteral |
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*/ |
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private $originalString; |
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/** |
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* @var StringLiteral[] |
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* Associative array with languages as keys and translations as values. |
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*/ |
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private $translations; |
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public function __construct(Language $originalLanguage, StringLiteral $originalString) |
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{ |
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$this->originalLanguage = $originalLanguage; |
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$this->originalString = $originalString; |
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$this->translations = []; |
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} |
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/** |
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* @return Language |
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*/ |
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public function getOriginalLanguage() |
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{ |
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return $this->originalLanguage; |
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} |
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/** |
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* @return StringLiteral |
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*/ |
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public function getOriginalString() |
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{ |
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return $this->originalString; |
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} |
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/** |
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* @param Language $language |
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* @param StringLiteral $translation |
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* @return MultilingualString |
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*/ |
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public function withTranslation(Language $language, StringLiteral $translation) |
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{ |
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if ($language->getCode() == $this->originalLanguage->getCode()) { |
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throw new \InvalidArgumentException('Can not translate to original language.'); |
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} |
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$c = clone $this; |
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$c->translations[$language->getCode()] = $translation; |
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return $c; |
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} |
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/** |
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* @return StringLiteral[] |
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* Associative array with languages as keys and translations as values. |
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*/ |
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public function getTranslations() |
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{ |
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return $this->translations; |
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} |
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/** |
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* @return StringLiteral[] |
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* Associative array with languages as keys and translations as values. |
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*/ |
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public function getTranslationsIncludingOriginal() |
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{ |
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return array_merge( |
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[$this->originalLanguage->getCode() => $this->originalString], |
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$this->translations |
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); |
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} |
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/** |
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* @param Language $preferredLanguage |
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* @param Language[] ...$fallbackLanguages |
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* One or more accept languages. |
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* @return StringLiteral|null |
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*/ |
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public function getStringForLanguage(Language $preferredLanguage, Language ...$fallbackLanguages) |
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{ |
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$languages = $fallbackLanguages; |
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array_unshift($languages, $preferredLanguage); |
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$translations = $this->getTranslationsIncludingOriginal(); |
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foreach ($languages as $language) { |
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if (isset($translations[$language->getCode()])) { |
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return $translations[$language->getCode()]; |
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} |
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} |
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return null; |
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} |
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/** |
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* @return array |
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*/ |
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public function serialize() |
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{ |
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$serialized = []; |
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foreach ($this->getTranslationsIncludingOriginal() as $language => $translation) { |
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$serialized[$language] = $translation->toNative(); |
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} |
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return $serialized; |
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} |
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/** |
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* @param array $data |
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* @param string|null $originalLanguage |
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* @return MultilingualString |
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*/ |
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public static function deserialize(array $data, $originalLanguage = null) |
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{ |
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$languages = array_keys($data); |
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if (!$originalLanguage || !isset($data[$originalLanguage])) { |
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$originalLanguage = reset($languages); |
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} |
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$string = new MultilingualString(new Language($originalLanguage), new StringLiteral($data[$originalLanguage])); |
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foreach ($data as $language => $translation) { |
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if ($language === $originalLanguage) { |
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continue; |
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} |
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$string = $string->withTranslation(new Language($language), new StringLiteral($translation)); |
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} |
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return $string; |
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} |
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/** |
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* @param TranslatedValueObject $udb3Model |
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* @return MultilingualString |
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*/ |
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public static function fromUdb3ModelTranslatedValueObject(TranslatedValueObject $udb3Model) |
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{ |
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$originalLanguage = $udb3Model->getOriginalLanguage(); |
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$originalValue = $udb3Model->getTranslation($originalLanguage); |
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if (!method_exists($originalValue, 'toString')) { |
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throw new \InvalidArgumentException( |
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'Cannot create MultilingualString from TranslatedValueObject that cannot be casted to string.' |
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); |
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} |
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$string = new MultilingualString( |
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Language::fromUdb3ModelLanguage($originalLanguage), |
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new StringLiteral($originalValue->toString()) |
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); |
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foreach ($udb3Model->getLanguagesWithoutOriginal() as $language) { |
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$translation = $udb3Model->getTranslation($language); |
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$string = $string->withTranslation( |
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new Language($language->toString()), |
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new StringLiteral($translation->toString()) |
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); |
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} |
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return $string; |
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} |
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} |
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In PHP, under loose comparison (like
==
, or!=
, orswitch
conditions), values of different types might be equal.For
string
values, the empty string''
is a special case, in particular the following results might be unexpected: