Initial survey bundle import

src/Service/SurveyEngine.php

@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Mummert\SurveyBundle\Service;
+
+use Mummert\SurveyBundle\Model\SurveyContentModel;
+use Mummert\SurveyBundle\Model\SurveyModel;
+use Mummert\SurveyBundle\Repository\SurveyConditionRepository;
+use Mummert\SurveyBundle\Repository\SurveyQuestionRepository;
+
+final class SurveyEngine
+{
+    public function __construct(
+        private readonly SurveyConditionRepository $surveyConditionRepository,
+        private readonly SurveyQuestionRepository $surveyQuestionRepository,
+    ) {
+    }
+
+    public function resolveConditionalTarget(SurveyModel $survey, SurveyContentModel $sourceQuestion, string $normalizedAnswer): ?SurveyContentModel
+    {
+        $condition = $this->surveyConditionRepository->findMatchingCondition(
+            (int) $survey->id,
+            (int) $sourceQuestion->id,
+            mb_strtolower(trim($normalizedAnswer)),
+        );
+
+        if (null === $condition) {
+            return null;
+        }
+
+        return $this->surveyQuestionRepository->findByIdForSurvey(
+            (int) $survey->id,
+            (int) $condition->targetQuestion,
+            false,
+        );
+    }
+}