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<?php |
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namespace SpareParts\Enum\Converter; |
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use SpareParts\Enum\Enum; |
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/** |
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* Converts Enum values to custom string values using map |
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* |
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* Usage: |
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* $converter = new MapConverter( |
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* [ |
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* 'totally_opened' => WindowState::OPEN(), |
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* 'totally_closed' => WindowState::CLOSED(), |
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* ] |
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* ); |
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* |
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* $converter->toEnum('totally_closed') // returns WindowState::CLOSED() instance |
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* |
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* $converter->fromEnum(WindowState::CLOSED()) // returns 'totally_closed' string |
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*/ |
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class MapConverter implements IConverter |
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{ |
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/** |
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* @var array mapValue => enumInstance |
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*/ |
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protected $scalarMap = []; |
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/** |
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* @var array enumString => mapValue |
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*/ |
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protected $enumMap = []; |
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/** |
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* @param array $map { [enumValue: string]: Enum } |
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* @throws ConverterSetupException |
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*/ |
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public function __construct(array $map) |
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{ |
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$this->enumMap = $map; |
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foreach ($map as $value => $enum) { |
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if (!($enum instanceof Enum)) { |
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$ident = is_object($enum) ? get_class($enum) : print_r($enum, true); |
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throw new ConverterSetupException(sprintf('Class %s is not a valid Enum. (doesnt extend Enum class)', $ident)); |
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} |
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$this->scalarMap[(string) $enum] = $value; |
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} |
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} |
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/** |
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* @param mixed $value |
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* @return Enum |
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* @throws UnableToConvertException |
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*/ |
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public function toEnum($value): Enum |
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{ |
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if (!is_scalar($value)) { |
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throw new UnableToConvertException(sprintf('Unable to convert: Value %s is not a scalar value.', print_r($value, true))); |
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} |
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if (!isset($this->enumMap[$value])) { |
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throw new UnableToConvertException(sprintf('Unable to convert: Value %s not found in possible options: [%s]', $value, implode(', ', array_keys($this->enumMap)))); |
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} |
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return $this->enumMap[$value]; |
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} |
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/** |
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* @param Enum $enum |
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* @return mixed |
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* @throws UnableToConvertException |
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*/ |
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public function fromEnum(Enum $enum) |
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{ |
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if (!isset($this->scalarMap[(string) $enum])) { |
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throw new UnableToConvertException( |
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sprintf( |
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'Unable to convert: Enum %s::%s() not found in possible options: [%s]', |
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get_class($enum), |
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(string) $enum, |
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implode(', ', array_keys($this->enumMap)) |
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) |
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); |
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} |
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return $this->scalarMap[(string) $enum]; |
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} |
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} |
SpareParts /
Enum
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