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<?php |
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namespace Spatie\Enum; |
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use BadMethodCallException; |
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use ReflectionClass; |
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/** |
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* @property-read string value |
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* @property-read string label |
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*/ |
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abstract class Enum |
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{ |
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/** @var mixed */ |
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protected $value; |
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protected string $label; |
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private static array $definitionCache = []; |
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public static function toArray(): array |
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{ |
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$array = []; |
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foreach (static::resolveDefinition() as $definition) { |
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$array[$definition->value] = $definition->label; |
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} |
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return $array; |
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} |
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/** |
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* @param mixed $value |
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*/ |
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public function __construct($value) |
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{ |
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$definition = $this->findDefinition($value); |
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if ($definition === null) { |
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$enumClass = static::class; |
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throw new BadMethodCallException("There's no value {$value} defined for enum {$enumClass}, consider adding it in the docblock definition."); |
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} |
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$this->value = $definition->value; |
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$this->label = $definition->label; |
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} |
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public function __get($name) |
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{ |
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if ($name === 'label') { |
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return $this->label; |
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} |
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if ($name === 'value') { |
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return $this->value; |
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} |
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} |
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public static function __callStatic(string $name, array $arguments) |
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{ |
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return new static($name); |
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} |
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public function __call($name, $arguments) |
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{ |
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if (strpos($name, 'is') === 0) { |
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$other = new static(lcfirst(str_replace('is', '', $name))); |
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return $this->equals($other); |
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} |
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} |
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public function equals(Enum ...$others): bool |
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{ |
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foreach ($others as $other) { |
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if ( |
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get_class($this) === get_class($other) |
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&& $this->value === $other->value |
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) { |
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return true; |
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} |
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} |
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return false; |
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} |
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protected static function values(): array |
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{ |
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return []; |
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} |
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protected static function labels(): array |
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{ |
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return []; |
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} |
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private function findDefinition(string $input): ?EnumDefinition |
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{ |
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foreach (static::resolveDefinition() as $definition) { |
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if ($definition->equals($input)) { |
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return $definition; |
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} |
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} |
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return null; |
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} |
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/** |
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* @return \Spatie\Enum\EnumDefinition[]|null |
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*/ |
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private static function resolveDefinition(): array |
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{ |
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$className = static::class; |
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if (static::$definitionCache[$className] ?? null) { |
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return static::$definitionCache[$className]; |
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} |
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$reflectionClass = new ReflectionClass($className); |
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$docComment = $reflectionClass->getDocComment(); |
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preg_match_all('/@method static self ([\w_]+)\(\)/', $docComment, $matches); |
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$definition = []; |
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$valueMap = static::values(); |
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$labelMap = static::labels(); |
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foreach ($matches[1] as $methodName) { |
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$definition[$methodName] = new EnumDefinition( |
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$methodName, |
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$valueMap[$methodName] ?? $methodName, |
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$labelMap[$methodName] ?? $methodName, |
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); |
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} |
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return static::$definitionCache[$className] ??= $definition; |
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} |
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} |
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spatie /
enum
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