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<?php |
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namespace Tleckie\Enum; |
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use InvalidArgumentException; |
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use ReflectionClass; |
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use function array_key_exists; |
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use function array_keys; |
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use function array_search; |
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use function array_values; |
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/** |
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* Class Enum |
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* |
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* @package Tleckie\Enum |
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* @author Teodoro Leckie Westberg <[email protected]> |
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*/ |
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class Enum implements EnumInterface |
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{ |
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/** @var array */ |
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private static array $constants = []; |
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protected static array $instances = []; |
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/** @var mixed */ |
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private mixed $value; |
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/** @var mixed */ |
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private mixed $key; |
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/** |
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* Enum constructor. |
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* |
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* @param mixed $value |
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*/ |
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final public function __construct(mixed $value) |
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{ |
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$value = ($value instanceof EnumInterface) ? $value->getValue() : $value; |
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$this->key = static::searchNameByValue($value); |
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$this->value = $value; |
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} |
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/** |
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* @return mixed[] |
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*/ |
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private static function constants(): array |
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{ |
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if (isset(static::$constants[static::class])) { |
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return static::$constants[static::class]; |
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} |
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$reflection = new ReflectionClass(static::class); |
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static::$constants[static::class] = $reflection->getConstants(); |
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return static::$constants[static::class]; |
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} |
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/** |
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* @return mixed |
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*/ |
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public function getValue(): mixed |
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{ |
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return $this->value; |
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} |
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/** |
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* @param mixed $value |
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* @return string |
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*/ |
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private static function searchNameByValue(mixed $value): string |
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{ |
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$name = array_search($value, static::constants(), true); |
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if (false === $name) { |
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throw new InvalidArgumentException(sprintf('Constant value [%s] not found', $value)); |
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} |
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return $name; |
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} |
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/** |
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* @param string $name |
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* @param array $arguments |
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* @return self |
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*/ |
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final public static function __callStatic(string $name, array $arguments): self |
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{ |
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if (!array_key_exists($name, static::constants())) { |
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throw new InvalidArgumentException(sprintf('Constant [%s] is not defined', $name)); |
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} |
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if (isset(static::$instances[static::class][$name])) { |
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return static::$instances[static::class][$name]; |
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} |
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static::$instances[static::class][$name] = new static(static::constants()[$name]); |
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return static::$instances[static::class][$name]; |
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} |
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/** |
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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(static::$constants[static::class]); |
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} |
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/** |
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* @return string[] |
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*/ |
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public function getKeys(): array |
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{ |
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return array_keys(static::$constants[static::class]); |
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} |
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/** |
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* @return string |
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*/ |
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public function getKey(): string |
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{ |
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return $this->key; |
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} |
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/** |
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* @return array |
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*/ |
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public function toArray(): array |
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{ |
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return static::$constants[static::class]; |
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} |
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/** |
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* @return string |
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*/ |
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public function __toString(): string |
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{ |
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return $this->value; |
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} |
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} |
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teodoroleckie /
enum
