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<?php |
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namespace Spatie\ModelStates; |
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use Illuminate\Database\Eloquent\Model; |
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use Spatie\ModelStates\Exceptions\InvalidConfig; |
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class StateConfig |
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{ |
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public string $field; |
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/** @var string|\Spatie\ModelStates\State */ |
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public $stateClass; |
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/** @var string[] */ |
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public array $allowedTransitions = []; |
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public ?string $defaultStateClass = null; |
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public function __construct(string $field, string $stateClass) |
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{ |
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if (! is_subclass_of($stateClass, State::class)) { |
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throw InvalidConfig::doesNotExtendState($stateClass); |
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} |
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$this->field = $field; |
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$this->stateClass = $stateClass; |
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} |
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public function default(string $defaultStateClass): StateConfig |
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{ |
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$this->defaultStateClass = $defaultStateClass; |
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return $this; |
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} |
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/** |
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* @param string|array $from |
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* @param string $to |
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* @param string|null $transition |
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* |
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* @return \Spatie\ModelStates\StateConfig |
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*/ |
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public function allowTransition($from, string $to, string $transition = null): StateConfig |
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{ |
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if (is_array($from)) { |
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foreach ($from as $fromState) { |
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$this->allowTransition($fromState, $to, $transition); |
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} |
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return $this; |
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} |
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if (! is_subclass_of($from, $this->stateClass)) { |
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throw InvalidConfig::doesNotExtendBaseClass($from, $this->stateClass); |
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} |
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if (! is_subclass_of($to, $this->stateClass)) { |
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throw InvalidConfig::doesNotExtendBaseClass($to, $this->stateClass); |
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} |
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if ($transition && ! is_subclass_of($transition, Transition::class)) { |
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throw InvalidConfig::doesNotExtendTransition($transition); |
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} |
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$this->allowedTransitions[$this->createTransitionKey($from, $to)] = $transition; |
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return $this; |
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} |
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public function allowTransitions(array $transitions): StateConfig |
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{ |
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foreach ($transitions as $transition) { |
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$this->allowTransition($transition[0], $transition[1], $transition[2] ?? null); |
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} |
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return $this; |
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} |
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public function transitionableStates(string $fromClass): array |
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{ |
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$transitionableStates = []; |
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foreach ($this->allowedTransitions as $allowedTransition => $value) { |
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[$from, $to] = explode('-', $allowedTransition); |
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if ($from !== $fromClass) { |
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continue; |
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} |
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$transitionableStates[] = $to::getMorphClass(); |
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} |
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return $transitionableStates; |
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} |
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/** |
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* @param string $from |
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* @param string $to |
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* |
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* @return string|\Spatie\ModelStates\Transition|null |
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*/ |
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public function resolveTransition(Model $model, string $from, string $to) |
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{ |
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$transitionKey = $this->createTransitionKey($from, $to); |
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if (! array_key_exists($transitionKey, $this->allowedTransitions)) { |
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return; |
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} |
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return $this->allowedTransitions[$transitionKey] |
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?? new DefaultTransition( |
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$model, |
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$this->field, |
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$this->stateClass::make($to, $model) |
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); |
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} |
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private function createTransitionKey(string $from, string $to): string |
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{ |
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return "{$from}-{$to}"; |
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} |
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} |
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spatie /
laravel-model-states
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