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<?php |
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declare(strict_types=1); |
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/* |
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* Copyright (C) 2020-2025 Iain Cambridge |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU LESSER GENERAL PUBLIC LICENSE as published by |
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* the Free Software Foundation, either version 2.1 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <https://www.gnu.org/licenses/>. |
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*/ |
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namespace Parthenon\AbTesting\Experiment; |
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use Parthenon\AbTesting\Decider\ChoiceDeciderInterface; |
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use Parthenon\AbTesting\Decider\EnabledDecider\DecidedManagerInterface; |
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use Parthenon\AbTesting\Events\SessionCreator; |
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use Parthenon\AbTesting\Repository\ExperimentLogRepositoryInterface; |
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use Parthenon\AbTesting\Repository\ExperimentRepositoryInterface; |
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use Parthenon\Common\Exception\NoEntityFoundException; |
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use Parthenon\User\Entity\UserInterface; |
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use Ramsey\Uuid\Uuid; |
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use Symfony\Component\HttpFoundation\Exception\SessionNotFoundException; |
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use Symfony\Component\HttpFoundation\RequestStack; |
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final class Decider implements DeciderInterface |
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{ |
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private ExperimentLogRepositoryInterface $experimentLogRepository; |
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private RequestStack $requestStack; |
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private DecidedManagerInterface $enabledDecider; |
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private ChoiceDeciderInterface $choiceDecider; |
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private ExperimentRepositoryInterface $experimentRepository; |
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public function __construct(ExperimentRepositoryInterface $experimentRepository, ExperimentLogRepositoryInterface $experimentLogRepository, RequestStack $requestStack, DecidedManagerInterface $enabledDecider, ChoiceDeciderInterface $deciderManager) |
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{ |
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$this->experimentLogRepository = $experimentLogRepository; |
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$this->requestStack = $requestStack; |
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$this->enabledDecider = $enabledDecider; |
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$this->choiceDecider = $deciderManager; |
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$this->experimentRepository = $experimentRepository; |
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} |
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public function doExperiment(string $experimentName, ?UserInterface $user = null, array $options = []): string |
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{ |
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try { |
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$session = $this->requestStack->getSession(); |
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} catch (SessionNotFoundException $e) { |
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return 'control'; |
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} |
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if (!$this->enabledDecider->isTestable()) { |
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return 'control'; |
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} |
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$decision = $this->choiceDecider->getChoice($experimentName); |
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if (!is_null($decision)) { |
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return $decision; |
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} |
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$decision = $session->get('ab_testing_'.$experimentName); |
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if (null === $decision) { |
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$randomNumber = mt_rand(0, 100); |
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$lowerBound = 0; |
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try { |
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$experiment = $this->experimentRepository->findByName($experimentName); |
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$decision = 'control'; |
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foreach ($experiment->getVariants() as $variant) { |
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$upperBound = $lowerBound + $variant->getPercentage(); |
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if (100 === $upperBound) { |
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$decision = $variant->getName(); |
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break; |
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} |
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if ($randomNumber > $lowerBound && $randomNumber <= $upperBound) { |
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$decision = $variant->getName(); |
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break; |
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} |
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$lowerBound = $upperBound; |
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} |
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} catch (NoEntityFoundException $e) { |
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$decision = 'control'; |
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} |
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$idAsString = $session->get(SessionCreator::SESSION_ID); |
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$uuid = Uuid::fromString($idAsString); |
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$this->experimentLogRepository->saveDecision($uuid, $experimentName, $decision); |
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$session->set('ab_testing_'.$experimentName, $decision); |
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} |
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return $decision; |
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} |
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} |
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getparthenon /
parthenon
