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<?php |
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/* |
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* This file is part of the xAPI package. |
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* |
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* (c) Christian Flothmann <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Xabbuh\XApi\Model; |
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/** |
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* Read-only dictionary mapping RFC 5646 language tags to translated strings. |
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* |
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* @author Christian Flothmann <[email protected]> |
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*/ |
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final class LanguageMap implements \ArrayAccess, \Countable |
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{ |
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private $map; |
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/** |
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* Creates a language map from the given dictionary. |
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* |
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* Keys are RFC 5646 language tags and each value is a string in the |
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* language specified by the key. |
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* |
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* @param array $map |
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* |
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* @return self |
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*/ |
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public static function create(array $map) |
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{ |
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$languageMap = new self(); |
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$languageMap->map = $map; |
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return $languageMap; |
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} |
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/** |
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* Creates a new language map based on the current map including the given entry. |
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* |
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* An existing entry will be overridden if the given language tag is already |
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* present in this language map. |
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* |
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* @param string $languageTag |
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* @param string $value |
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* |
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* @return self |
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*/ |
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public function withEntry($languageTag, $value) |
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{ |
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$languageMap = clone $this; |
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$languageMap->map[$languageTag] = $value; |
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return $languageMap; |
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} |
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/** |
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* Returns an unordered list of all language tags being used as keys |
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* in this language map. |
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* |
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* @return string[] |
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*/ |
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public function languageTags() |
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{ |
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return array_keys($this->map); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function offsetExists($languageTag) |
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{ |
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return isset($this->map[$languageTag]); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function offsetGet($languageTag) |
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{ |
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if (!isset($this->map[$languageTag])) { |
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throw new \InvalidArgumentException(sprintf('The requested language tag "%s" does not exist in this language map.', $languageTag)); |
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} |
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return $this->map[$languageTag]; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function offsetSet($languageTag, $value) |
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{ |
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throw new \LogicException('The values of a language map cannot be modified. Use withEntry() instead to retrieve a new language map with the added or modified value.'); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function offsetUnset($languageTag) |
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{ |
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throw new \LogicException('Entries of a language map cannot be removed.'); |
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} |
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public function count() |
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{ |
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return count($this->map); |
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} |
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public function equals(LanguageMap $languageMap) |
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{ |
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if (count($this->map) !== count($languageMap->map)) { |
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return false; |
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} |
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foreach ($this->map as $languageTag => $value) { |
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if (!isset($languageMap[$languageTag])) { |
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return false; |
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} |
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if ($value !== $languageMap[$languageTag]) { |
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return false; |
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} |
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} |
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return true; |
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} |
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} |
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php-xapi /
model
