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<?php |
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declare(strict_types = 1); |
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/* |
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* This file is part of the StateMachine package |
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* |
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* (c) Michal Wachowski <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace StateMachine; |
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/** |
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* Adapter for array schemas |
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* |
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* @package StateMachine |
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*/ |
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final class ArrayFactory |
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{ |
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/** |
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* Schema array |
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* |
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* @var array |
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*/ |
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private $schema; |
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/** |
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* Resolved process instance |
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* |
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* @var Process |
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*/ |
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private $process; |
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/** |
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* Construct |
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* |
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* @param array $schema |
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*/ |
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public function __construct(array $schema) |
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{ |
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$this->schema = $schema; |
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} |
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/** |
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* Return schema (process) name |
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* |
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* @return string |
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*/ |
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public function getSchemaName(): string |
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{ |
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return $this->getOffsetFromArray($this->schema, 'name'); |
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} |
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/** |
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* Return initial state name |
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* |
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* @return string |
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*/ |
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public function getInitialState(): string |
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{ |
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return $this->getOffsetFromArray($this->schema, 'initialState'); |
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} |
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/** |
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* Build states for process |
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* |
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* @return array |
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*/ |
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private function buildStates(): array |
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{ |
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$states = []; |
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foreach ($this->getOffsetFromArray($this->schema, 'states', []) as $state) { |
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$states[] = new State( |
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$this->getOffsetFromArray($state, 'name'), |
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$this->buildEvents($state), |
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$this->getAdditionalFromArray($state, ['events', 'name']) |
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); |
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} |
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return $states; |
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} |
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/** |
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* Build state events |
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* |
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* @param array $state |
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* |
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* @return Event[] |
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*/ |
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private function buildEvents(array $state): array |
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{ |
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$events = []; |
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foreach ($this->getOffsetFromArray($state, 'events', []) as $event) { |
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$events[] = new Event( |
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$this->getOffsetFromArray($event, 'name'), |
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$this->getOffsetFromArray($event, 'targetState'), |
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$this->getOffsetFromArray($event, 'errorState'), |
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$this->getOffsetFromArray($event, 'command'), |
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$this->getAdditionalFromArray($event, ['name', 'command', 'targetState', 'errorState']) |
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); |
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} |
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return $events; |
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} |
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/** |
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* Return schema process |
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* |
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* @return Process |
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*/ |
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public function getProcess(): Process |
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{ |
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if ($this->process === null) { |
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$this->process = new Process( |
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$this->getSchemaName(), |
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$this->getInitialState(), |
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$this->buildStates() |
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); |
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} |
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return $this->process; |
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} |
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/** |
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* Returns array element matching key |
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* |
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* @param array $array |
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* @param string $offset |
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* @param mixed $default |
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* |
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* @return mixed |
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*/ |
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private function getOffsetFromArray(array $array, $offset, $default = null) |
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{ |
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return array_key_exists($offset, $array) ? $array[$offset] : $default; |
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} |
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/** |
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* Return array elements not matching keys |
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* |
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* @param array $array |
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* @param array $ignoredKeys |
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* |
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* @return array |
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*/ |
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private function getAdditionalFromArray(array $array, array $ignoredKeys): array |
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{ |
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return array_intersect_key($array, array_diff_key($array, array_flip($ignoredKeys))); |
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} |
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} |
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