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<?php |
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/** |
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* This file is part of the php-state project. |
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* |
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* (c) Yannick Voyer <[email protected]> (http://github.com/yvoyer) |
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*/ |
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namespace Star\Component\State; |
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use Star\Component\State\Transitions\ReadOnlyTransition; |
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use Webmozart\Assert\Assert; |
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final class TransitionRegistry implements StateRegistry |
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{ |
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/** |
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* @var array[] Collection of states indexed by transition name |
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*/ |
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private $transitions = []; |
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/** |
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* @var array[] Collection of attributes indexed by state name |
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*/ |
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private $states = []; |
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/** |
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* @param StateTransition $transition |
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*/ |
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public function addTransition(StateTransition $transition) |
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{ |
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$name = $transition->getName(); |
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if (isset($this->transitions[$name])) { |
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throw DuplicateEntryException::duplicateTransition($name); |
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} |
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$transition->onRegister($this); |
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} |
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/** |
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* @param string $name The transition name |
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* |
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* @return StateTransition |
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* @throws NotFoundException |
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*/ |
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public function getTransition($name) |
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{ |
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Assert::string($name); |
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$transition = null; |
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if (isset($this->transitions[$name]['to'])) { |
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$transition = new ReadOnlyTransition($this->transitions[$name]['to']); |
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} |
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if (! $transition) { |
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throw NotFoundException::transitionNotFound($name); |
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} |
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return $transition; |
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} |
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/** |
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* @param string $state |
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* @param string $attribute |
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*/ |
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public function addAttribute($state, $attribute) |
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{ |
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$attributes = [$attribute]; |
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if ($this->hasState($state)) { |
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$attributes = array_merge($this->states[$state], $attributes); |
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} |
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$this->states[$state] = array_unique($attributes); |
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} |
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/** |
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* @param string $state |
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* @param string[] $attributes |
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*/ |
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private function addAttributes($state, array $attributes) |
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{ |
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array_map( |
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function ($attribute) use ($state) { |
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$this->addAttribute($state, $attribute); |
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}, |
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$attributes |
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); |
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} |
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/** |
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* @param string $transition |
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* @param string $state |
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* |
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* @return bool |
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*/ |
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public function transitionStartsFrom($transition, $state) { |
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Assert::string($transition); |
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Assert::string($state); |
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$from = []; |
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if (isset($this->transitions[$transition]['from'])) { |
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$from = $this->transitions[$transition]['from']; |
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} |
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return in_array($state, $from, true); |
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} |
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/** |
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* @param string $state |
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* @param string $attribute |
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* |
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* @return bool |
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*/ |
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public function hasAttribute($state, $attribute) |
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{ |
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Assert::string($state); |
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Assert::string($attribute); |
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if (! $this->hasState($state)) { |
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return false; |
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} |
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return in_array($attribute, $this->states[$state]); |
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} |
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/** |
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* @param string $name |
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* |
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* @return bool |
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*/ |
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public function hasState($name) |
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{ |
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return array_key_exists($name, $this->states); |
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} |
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/** |
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* @param TransitionVisitor $visitor |
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*/ |
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public function acceptTransitionVisitor(TransitionVisitor $visitor) |
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{ |
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foreach ($this->transitions as $transition => $states) { |
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$visitor->visitTransition($transition); |
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foreach ($states['from'] as $from) { |
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$visitor->visitFromState($from, $this->states[$from]); |
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} |
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$visitor->visitToState($states['to'], $this->states[$states['to']]); |
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} |
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} |
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/** |
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* @param StateVisitor $visitor |
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*/ |
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public function acceptStateVisitor(StateVisitor $visitor) |
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{ |
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foreach ($this->states as $state => $attributes) { |
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$visitor->visitState($state, $attributes); |
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} |
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} |
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/** |
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* @param string $transition |
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* @param string $stateName |
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* @param string[] $attributes |
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*/ |
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public function registerStartingState($transition, $stateName, array $attributes = []) |
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{ |
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$this->initState($stateName); |
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$this->addAttributes($stateName, $attributes); |
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$this->transitions[$transition]['from'][] = $stateName; |
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} |
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/** |
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* @param string $transition |
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* @param string $stateName |
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* @param string[] $attributes |
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*/ |
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public function registerDestinationState($transition, $stateName, array $attributes = []) |
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{ |
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$this->initState($stateName); |
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$this->addAttributes($stateName, $attributes); |
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$this->transitions[$transition]['to'] = $stateName; |
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} |
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/** |
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* @param string $state |
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*/ |
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private function initState($state) |
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{ |
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if (!$this->hasState($state)) { |
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$this->states[$state] = []; |
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} |
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} |
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} |
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yvoyer /
php-state
