feat: add controller logic

app/Http/Controllers/AvailabilityController.php

@@ -2,9 +2,18 @@
 
 namespace App\Http\Controllers;
 
-use Illuminate\Http\Request;
+use App\Services\SlotService;
+use Illuminate\Http\JsonResponse;
 
 class AvailabilityController extends Controller
 {
-    //
+    public function __construct(
+        private readonly SlotService $slotService,
+    ) {
+    }
+
+    public function index(): JsonResponse
+    {
+        return response()->json($this->slotService->getAvailability());
+    }
 }

app/Http/Controllers/HoldController.php

@@ -2,9 +2,63 @@
 
 namespace App\Http\Controllers;
 
-use Illuminate\Http\Request;
+use App\Exceptions\HoldNotAvailableException;
+use App\Exceptions\SlotCapacityExceededException;
+use App\Models\Hold;
+use App\Models\Slot;
+use App\Services\SlotService;
+use Illuminate\Http\JsonResponse;
+use Symfony\Component\HttpFoundation\Response;
 
 class HoldController extends Controller
 {
-    //
+    public function __construct(
+        private readonly SlotService $slotService,
+    ) {
+    }
+
+    public function store(Slot $slot): JsonResponse
+    {
+        $idempotencyKey = request()->header('X-Idempotency-Key');
+
+        try {
+            $hold = $this->slotService->createHold($slot, $idempotencyKey);
+        } catch (SlotCapacityExceededException $exception) {
+            return response()->json([
+                'message' => $exception->getMessage()
+            ], Response::HTTP_CONFLICT);
+        }
+
+        return response()->json($this->holdPayload($hold), Response::HTTP_CREATED);
+    }
+
+    public function confirm(Hold $hold): JsonResponse
+    {
+        try {
+            $hold = $this->slotService->confirmHold($hold);
+        } catch (HoldNotAvailableException $exception) {
+            return response()->json([
+                'message' => $exception->getMessage()
+            ], Response::HTTP_CONFLICT);
+        }
+
+        return response()->json($this->holdPayload($hold));
+    }
+
+    public function destroy(Hold $hold): JsonResponse
+    {
+        $hold = $this->slotService->cancelHold($hold);
+
+        return response()->json($this->holdPayload($hold));
+    }
+
+    private function holdPayload(Hold $hold): array
+    {
+        return [
+            'id' => $hold->id,
+            'slot_id' => $hold->slot_id,
+            'status' => $hold->status,
+            'expires_at' => $hold->expires_at->toIso8601String(),
+        ];
+    }
 }