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<?php |
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declare(strict_types=1); |
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namespace MabeEnum; |
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use ArrayAccess; |
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use Countable; |
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use InvalidArgumentException; |
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use Iterator; |
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use IteratorAggregate; |
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use UnexpectedValueException; |
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/** |
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* A map of enumerators (EnumMap<T>) and mixed values. |
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* |
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* @copyright 2019 Marc Bennewitz |
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* @license http://github.com/marc-mabe/php-enum/blob/master/LICENSE.txt New BSD License |
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* @link http://github.com/marc-mabe/php-enum for the canonical source repository |
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*/ |
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class EnumMap implements ArrayAccess, Countable, IteratorAggregate |
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{ |
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/** |
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* The classname of the enumeration type |
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* @var string |
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*/ |
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private $enumeration; |
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/** |
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* Internal map of ordinal number and value |
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* @var array |
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*/ |
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private $map = []; |
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/** |
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* Constructor |
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* @param string $enumeration The classname of the enumeration type |
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* @throws InvalidArgumentException |
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*/ |
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public function __construct(string $enumeration) |
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{ |
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if (!\is_subclass_of($enumeration, Enum::class)) { |
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throw new InvalidArgumentException(\sprintf( |
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'%s can handle subclasses of %s only', |
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__CLASS__, |
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Enum::class |
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)); |
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} |
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$this->enumeration = $enumeration; |
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} |
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/** |
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* Get the classname of the enumeration |
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* @return string |
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*/ |
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public function getEnumeration(): string |
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{ |
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return $this->enumeration; |
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} |
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/** |
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* Get a list of map keys |
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* @return Enum[] |
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*/ |
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public function getKeys(): array |
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{ |
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return \array_map([$this->enumeration, 'byOrdinal'], \array_keys($this->map)); |
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} |
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/** |
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* Get a list of map values |
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* @return mixed[] |
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*/ |
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public function getValues(): array |
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{ |
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return \array_values($this->map); |
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} |
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/** |
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* Search for the given value |
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* @param mixed $value |
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* @param bool $strict Use strict type comparison |
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* @return Enum|null The found key or NULL |
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*/ |
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public function search($value, bool $strict = false) |
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{ |
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$ord = \array_search($value, $this->map, $strict); |
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if ($ord !== false) { |
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return ($this->enumeration)::byOrdinal($ord); |
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} |
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return null; |
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} |
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/** |
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* Test if the given enumerator exists |
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* @param Enum|null|bool|int|float|string|array $enumerator |
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* @return bool |
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* @see offsetExists |
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*/ |
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public function contains($enumerator): bool |
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{ |
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try { |
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$ord = ($this->enumeration)::get($enumerator)->getOrdinal(); |
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return \array_key_exists($ord, $this->map); |
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} catch (InvalidArgumentException $e) { |
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// An invalid enumerator can't be contained in this map |
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return false; |
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} |
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} |
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/** |
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* Test if the given enumerator key exists and is not NULL |
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* @param Enum|null|bool|int|float|string|array $enumerator |
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* @return bool |
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* @see contains |
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*/ |
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public function offsetExists($enumerator): bool |
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{ |
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try { |
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return isset($this->map[($this->enumeration)::get($enumerator)->getOrdinal()]); |
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} catch (InvalidArgumentException $e) { |
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// An invalid enumerator can't be an offset of this map |
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return false; |
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} |
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} |
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/** |
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* Get mapped data for the given enumerator |
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* @param Enum|null|bool|int|float|string|array $enumerator |
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* @return mixed |
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* @throws InvalidArgumentException On an invalid given enumerator |
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* @throws UnexpectedValueException If the given enumerator does not exist in this map |
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*/ |
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public function offsetGet($enumerator) |
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{ |
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$enumerator = ($this->enumeration)::get($enumerator); |
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$ord = $enumerator->getOrdinal(); |
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if (!isset($this->map[$ord]) && !\array_key_exists($ord, $this->map)) { |
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throw new UnexpectedValueException(sprintf( |
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'Enumerator %s could not be found', |
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\var_export($enumerator->getValue(), true) |
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)); |
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} |
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return $this->map[$ord]; |
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} |
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/** |
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* Attach a new enumerator or overwrite an existing one |
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* @param Enum|null|bool|int|float|string|array $enumerator |
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* @param mixed $value |
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* @return void |
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* @throws InvalidArgumentException On an invalid given enumerator |
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* @see attach() |
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*/ |
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public function offsetSet($enumerator, $value = null): void |
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{ |
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$ord = ($this->enumeration)::get($enumerator)->getOrdinal(); |
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$this->map[$ord] = $value; |
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} |
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/** |
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* Detach an existing enumerator |
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* @param Enum|null|bool|int|float|string|array $enumerator |
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* @return void |
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* @throws InvalidArgumentException On an invalid given enumerator |
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* @see detach() |
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*/ |
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public function offsetUnset($enumerator): void |
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{ |
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$ord = ($this->enumeration)::get($enumerator)->getOrdinal(); |
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unset($this->map[$ord]); |
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} |
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/** |
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* Get a new Iterator. |
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* |
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* @return Iterator |
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*/ |
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public function getIterator(): Iterator |
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{ |
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$map = $this->map; |
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foreach ($map as $ordinal => $value) { |
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yield ($this->enumeration)::byOrdinal($ordinal) => $value; |
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} |
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} |
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/** |
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* Count the number of elements |
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* |
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* @return int |
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*/ |
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public function count(): int |
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{ |
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return \count($this->map); |
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} |
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} |
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marc-mabe /
php-enum
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