feat(ticket): resolve effective event dates and handle reschedule chains

app/Domains/Event/Services/EffectiveEventDateResolver.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace App\Domains\Event\Services;
+
+use App\Domains\Event\Models\EventDate;
+
+class EffectiveEventDateResolver
+{
+    public function resolve(EventDate $eventDate): ?EventDate
+    {
+        $current = $eventDate;
+        $visited = [];
+
+        while (true) {
+            $identity = $current->getKey() === null
+                ? 'object:'.spl_object_id($current)
+                : 'key:'.$current->getKey();
+
+            if (isset($visited[$identity])) {
+                return null;
+            }
+
+            $visited[$identity] = true;
+
+            if ($current->rescheduled_to_event_date_id === null) {
+                return $current->cancelled_at === null ? $current : null;
+            }
+
+            $current->loadMissing('rescheduledTo');
+            $current = $current->rescheduledTo;
+
+            if ($current === null) {
+                return null;
+            }
+        }
+    }
+}