first commit

app/Http/Controllers/Api/CarParkingController.php

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+<?php
+
+namespace App\Http\Controllers\Api;
+
+use App\Http\Controllers\Controller;
+use App\Models\Car;
+use App\Models\ParkingRecord;
+use Illuminate\Http\Request;
+use Illuminate\Validation\Rule;
+use Illuminate\Support\Facades\DB;
+
+class CarParkingController extends Controller
+{
+
+    public function registerCar(Request $request) {
+
+        $data = $request->validate([
+            'plate_number' => 'required|string|max:20',
+        ]);
+
+        $car = Car::where('plate_number', $data['plate_number'])->first();
+
+        if ($car) {
+            return response()->json(['message' => 'Car already registered', 'car' => $car], 200);
+        }
+
+        $car = Car::create($data);
+
+        return response()->json(['message' => 'Car registered successfully', 'car' => $car], 201);
+        
+    }
+
+    public function registerEntry(Request $request) {
+
+        $data = $request->validate([
+            'plate_number' => 'required|string|exists:cars,plate_number',
+        ]);
+
+        $car = Car::where('plate_number', $data['plate_number'])->first();
+
+        // Check if there is an active parking record (entry_time set but exit_time null)
+        $activeParking = ParkingRecord::where('car_id', $car->id)
+            ->whereNull('exit_time')
+            ->first();
+
+        if ($activeParking) {
+            return response()->json(['message' => 'Car already parked inside'], 400);
+        }
+
+        $parkingRecord = ParkingRecord::create([
+            'car_id' => $car->id,
+            'entry_time' => now(),
+        ]);
+
+        return response()->json(['message' => 'Car entry registered', 'parking_record' => $parkingRecord], 201);
+
+    }
+
+    public function registerExit(Request $request) {
+
+        $data = $request->validate([
+            'plate_number' => 'required|string|exists:cars,plate_number',
+        ]);
+
+        $car = Car::where('plate_number', $data['plate_number'])->first();
+
+        $activeParking = ParkingRecord::where('car_id', $car->id)
+            ->whereNull('exit_time')
+            ->first();
+
+        if (!$activeParking) {
+            return response()->json(['message' => 'Car is not currently parked inside'], 400);
+        }
+
+        $activeParking->exit_time = now();
+        $activeParking->save();
+
+        return response()->json(['message' => 'Car exit registered', 'parking_record' => $activeParking]);
+
+    }
+
+    public function countCurrentParking() {
+
+        $count = ParkingRecord::whereNull('exit_time')->count();
+        return response()->json(['current_parked_cars' => $count]);
+
+    }
+
+    public function getCarHistory(Request $request) {
+
+        $data = $request->validate([
+            'plate_number' => 'required|string|exists:cars,plate_number',
+        ]);
+
+        $car = Car::where('plate_number', $data['plate_number'])->first();
+        $history = $car->parkingRecords()->orderBy('entry_time', 'desc')->get(['entry_time', 'exit_time']);
+
+        return response()->json([
+            'plate_number' => $car->plate_number,
+            'history' => $history
+        ]);
+
+    }
+
+}