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<?php |
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namespace Innmind\ProvisionerBundle; |
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use Innmind\ProvisionerBundle\Voter\VoterInterface; |
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use Symfony\Component\Console\Input\InputInterface; |
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class TriggerManager |
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{ |
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const STRATEGY_AFFIRMATIVE = 'affirmative'; |
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const STRATEGY_CONSENSUS = 'consensus'; |
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const STRATEGY_UNANIMOUS = 'unanimous'; |
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protected $voters = []; |
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protected $strategy; |
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protected $allowIfEqualGrantedDeniedDecisions; |
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protected $allowIfAllAbstainDecisions; |
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public function __construct($strategy = self::STRATEGY_AFFIRMATIVE, $allowIfEqualGrantedDeniedDecisions = true, $allowIfAllAbstainDecisions = false) |
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{ |
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if (!defined(sprintf('self::STRATEGY_%s', strtoupper($strategy)))) { |
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throw new \InvalidArgumentException(sprintf('The strategy "%s" is not supported', $strategy)); |
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} |
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$this->strategy = $strategy; |
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$this->allowIfEqualGrantedDeniedDecisions = $allowIfEqualGrantedDeniedDecisions; |
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$this->allowIfAllAbstainDecisions = $allowIfAllAbstainDecisions; |
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} |
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/** |
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* Add a new voter to the trigger manager |
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* |
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* @param VoterInterface $voter |
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* |
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* @return TriggerManager self |
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*/ |
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public function addVoter(VoterInterface $voter) |
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{ |
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$this->voters[] = $voter; |
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return $this; |
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} |
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/** |
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* Decide if the decision manager should be triggered or not |
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* |
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* @param string $command |
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* @param InputInterface $input |
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* |
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* @return bool |
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*/ |
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public function decide($command, InputInterface $input) |
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{ |
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$grant = 0; |
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$deny = 0; |
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$abstain = 0; |
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foreach ($this->voters as $voter) { |
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if (!$voter->supportsCommand($command)) { |
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continue; |
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} |
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$vote = $voter->vote($command, $input); |
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switch ($vote) { |
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case VoterInterface::TRIGGER_GRANTED: |
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$grant++; |
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break; |
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case VoterInterface::TRIGGER_DENIED: |
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$deny++; |
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break; |
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default: |
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$abstain++; |
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break; |
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} |
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} |
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switch ($this->strategy) { |
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case self::STRATEGY_AFFIRMATIVE: |
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return $grant > 0; |
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case self::STRATEGY_CONSENSUS: |
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if ($grant > $deny) { |
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return true; |
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} |
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if ($deny > $grant) { |
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return false; |
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} |
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if ($grant === $deny && $grant !== 0) { |
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return $this->allowIfEqualGrantedDeniedDecisions; |
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} |
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return $this->allowIfAllAbstainDecisions; |
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case self::STRATEGY_UNANIMOUS: |
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if ($deny > 0) { |
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return false; |
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} |
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if ($grant > 0) { |
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return true; |
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} |
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return $this->allowIfAllAbstainDecisions; |
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default: |
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return false; |
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} |
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} |
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} |
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Innmind /
ProvisionerBundle
