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<?php |
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namespace Spatie\ModelStates; |
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use Illuminate\Contracts\Database\Eloquent\Castable; |
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use Illuminate\Database\Eloquent\Model; |
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use JsonSerializable; |
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use ReflectionClass; |
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use Spatie\ModelStates\Exceptions\CouldNotPerformTransition; |
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abstract class State implements Castable, JsonSerializable |
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{ |
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private static array $stateMapping = []; |
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private Model $model; |
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private StateConfig $stateConfig; |
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public static function castUsing(array $arguments) |
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{ |
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return new StateCaster(static::class); |
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} |
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public static function getMorphClass(): string |
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{ |
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return static::$name ?? static::class; |
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} |
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public static function getStateMapping(): array |
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{ |
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if (! isset(self::$stateMapping[static::class])) { |
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self::$stateMapping[static::class] = static::resolveStateMapping(); |
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} |
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return self::$stateMapping[static::class]; |
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} |
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public static function resolveStateClass($state): ?string |
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{ |
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if ($state === null) { |
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return null; |
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} |
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if ($state instanceof State) { |
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return get_class($state); |
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} |
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foreach (static::getStateMapping() as $stateClass) { |
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if (! class_exists($stateClass)) { |
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continue; |
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} |
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// Loose comparison is needed here in order to support non-string values, |
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// Laravel casts their database value automatically to strings if we didn't specify the fields in `$casts`. |
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$name = isset($stateClass::$name) ? (string) $stateClass::$name : null; |
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if ($name == $state) { |
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return $stateClass; |
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} |
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} |
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return $state; |
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} |
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public function __construct(Model $model, StateConfig $stateConfig) |
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{ |
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$this->model = $model; |
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$this->stateConfig = $stateConfig; |
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} |
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public function transitionTo($newState): Model |
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{ |
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$newState = $this->resolveStateObject($newState); |
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$from = static::getMorphClass(); |
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$to = $newState::getMorphClass(); |
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if (! $this->stateConfig->isTransitionAllowed($from, $to)) { |
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throw CouldNotPerformTransition::notFound($from, $to, $this->model); |
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} |
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$transition = new DefaultTransition( |
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$this->model, |
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$this->stateConfig->fieldName, |
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$newState |
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); |
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$model = app()->call([$transition, 'handle']); |
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return $model; |
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} |
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public function transitionableStates(): array |
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{ |
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return $this->stateConfig->transitionableStates(self::getMorphClass()); |
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} |
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public function canTransitionTo($newState): bool |
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{ |
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$newState = $this->resolveStateObject($newState); |
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$from = static::getMorphClass(); |
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$to = $newState::getMorphClass(); |
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return $this->stateConfig->isTransitionAllowed($from, $to); |
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} |
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public function getValue(): string |
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{ |
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return static::getMorphClass(); |
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} |
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public function equals(State ...$otherStates): bool |
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{ |
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foreach ($otherStates as $otherState) { |
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if ($this->stateConfig->baseStateClass === $otherState->stateConfig->baseStateClass |
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&& $this->getValue() === $otherState->getValue()) { |
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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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public function jsonSerialize() |
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{ |
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return $this->getValue(); |
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} |
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public function __toString(): string |
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{ |
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return $this->getValue(); |
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} |
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private function resolveStateObject($state): self |
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{ |
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if (is_object($state) && is_subclass_of($state, $this->stateConfig->baseStateClass)) { |
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return $state; |
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} |
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$stateClassName = $this->stateConfig->baseStateClass::resolveStateClass($state); |
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return new $stateClassName($this->model, $this->stateConfig); |
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} |
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private static function resolveStateMapping(): array |
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{ |
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$reflection = new ReflectionClass(static::class); |
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['dirname' => $directory] = pathinfo($reflection->getFileName()); |
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$files = scandir($directory); |
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unset($files[0], $files[1]); |
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$namespace = $reflection->getNamespaceName(); |
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$resolvedStates = []; |
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foreach ($files as $file) { |
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['filename' => $className] = pathinfo($file); |
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/** @var \Spatie\ModelStates\State|mixed $stateClass */ |
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$stateClass = $namespace . '\\' . $className; |
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if (! is_subclass_of($stateClass, static::class)) { |
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continue; |
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} |
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$resolvedStates[$stateClass::getMorphClass()] = $stateClass; |
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} |
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return $resolvedStates; |
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} |
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} |
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spatie /
laravel-model-states
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