first commit

app/Http/Controllers/API/FavoriteController.php

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+<?php
+
+namespace App\Http\Controllers\API;
+
+use App\Http\Controllers\Controller;
+use App\Http\Resources\CityResource;
+use App\Models\City;
+use Illuminate\Http\Request;
+
+class FavoriteController extends Controller
+{
+    /**
+     * Get user's favorite cities
+     */
+    public function index(Request $request)
+    {
+        $favorites = $request->user()
+            ->favoriteCities()
+            ->withCount('attractions')
+            ->get();
+
+        return CityResource::collection($favorites);
+    }
+
+    /**
+     * Add city to favorites
+     */
+    public function store(Request $request, City $city)
+    {
+        $user = $request->user();
+
+        // Check if already favorited
+        if ($user->favoriteCities()->where('city_id', $city->id)->exists()) {
+            return response()->json([
+                'message' => 'City already in favorites',
+            ], 409);
+        }
+
+        $user->favoriteCities()->attach($city->id);
+
+        return response()->json([
+            'message' => 'City added to favorites',
+            'city' => new CityResource($city),
+        ], 201);
+    }
+
+    /**
+     * Remove city from favorites
+     */
+    public function destroy(Request $request, City $city)
+    {
+        $user = $request->user();
+        $user->favoriteCities()->detach($city->id);
+
+        return response()->json([
+            'message' => 'City removed from favorites',
+        ]);
+    }
+}