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<?php |
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namespace Robusto\Enum; |
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/** |
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* Trait for enumerations. |
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* |
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* @author Jarddel Antunes |
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* @package Robusto\Enum |
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* @copyright 2017 Robusto Enum |
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*/ |
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trait EnumTrait |
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{ |
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/** |
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* |
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* @var int Represents the value of the enumerative instance. |
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*/ |
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protected $value; |
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/** |
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* |
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* @var string Represents the description of the enumerative instance. |
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*/ |
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protected $description; |
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/** |
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* |
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* @var array Represents possible values according to the enumerative class. |
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*/ |
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protected static $values = []; |
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/** |
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* |
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* @var array Represents the possible descriptive values according to the enumerative class. |
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*/ |
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protected static $descriptions = []; |
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/** |
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* |
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* @var array Represents the names of the constants of the enumerative class. |
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*/ |
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protected static $constants = []; |
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/** |
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* Gets all possible values for the enumerative class. |
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* |
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* @return array |
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*/ |
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public static function getValues(): array |
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{ |
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static::assignValues(); |
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return static::$values; |
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} |
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/** |
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* Gets all possible descriptions for the enumerative class. |
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* |
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* @return array |
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*/ |
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public static function getDescriptions(): array |
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{ |
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static::assignValues(); |
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return static::$descriptions; |
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} |
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/** |
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* Get value of the enumerative instance. |
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* |
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* @return int |
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*/ |
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public function getValue(): int |
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{ |
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return $this->value; |
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} |
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/** |
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* Get description of the enumerative instance. |
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* |
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* @return string |
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*/ |
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public function getDescription(): string |
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{ |
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return (string) $this->description; |
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} |
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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 Enum |
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*/ |
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public static function __callStatic(string $name, array $arguments): EnumInterface |
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{ |
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static::assignConstants(); |
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static::assignValues(); |
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return static::getEnumByConstant($name); |
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} |
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/** |
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* Gets the descriptive value that represents the enumerative instance. |
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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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static::assignValues(); |
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$description = static::$descriptions[array_search($this->value, static::$values)] ?? $this->value; |
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return (string) $description; |
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} |
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/** |
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* Get the instance of the enumerative class |
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* |
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* @param int $value |
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* @param string $description |
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* @return EnumInterface |
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*/ |
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abstract protected static function getInstance(int $value, string $description = null): EnumInterface; |
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/** |
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* Get the instance of the enumerative class by constant |
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* |
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* @param string $constant |
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* @throws \InvalidArgumentException |
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* @return EnumInterface |
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*/ |
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protected static function getEnumByConstant(string $constant): EnumInterface |
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{ |
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static::assignConstants(); |
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static::assignValues(); |
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try { |
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return static::getEnumByValue($constant, static::$constants); |
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} catch(\InvalidArgumentException $exception) { |
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throw $exception; |
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} |
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} |
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/** |
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* Get the instance of the enumerative class by description |
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* |
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* @param string $constant |
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* @throws \InvalidArgumentException |
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* @return EnumInterface |
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*/ |
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protected static function getEnumByDescription(string $constant): EnumInterface |
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{ |
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static::assignValues(); |
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try { |
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return self::getEnumByValue($constant, static::$descriptions); |
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} catch(\InvalidArgumentException $exception) { |
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throw $exception; |
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} |
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} |
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/** |
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* Get the instance of the enumerative class by value, if it's in values. |
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* |
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* @param string $value |
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* @param array $values |
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* @throws \InvalidArgumentException |
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* @return EnumInterface |
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*/ |
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protected static function getEnumByValue(string $value, array $values): EnumInterface |
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{ |
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$index = array_search($value, $values); |
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if (false !== $index) { |
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$description = static::$descriptions[array_search(static::$values[$index], static::$values)] ?? ''; |
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$enum = static::getInstance(static::$values[$index], $description); |
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return $enum; |
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} |
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throw new \InvalidArgumentException("Invalid Value! Only enumerative values of the type:". static::class); |
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} |
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/** |
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* Assigns the possible values according to the enumerative class. |
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*/ |
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protected static function assignValues() |
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{ |
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static::$values = array_values((new \ReflectionClass(static::class))->getConstants()); |
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} |
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/** |
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* Assigns the constants of the enumerative class. |
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*/ |
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protected static function assignConstants() |
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{ |
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static::$constants = array_keys((new \ReflectionClass(static::class))->getConstants()); |
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} |
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} |
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