WunschBackend/app/Http/Controllers/WishController.php

<?php

namespace App\Http\Controllers;

use App\Models\Wish;
use Illuminate\Http\Request;

class WishController extends Controller
{
    function ClaimWish(Request $request, Wish $wish) {
        if($wish->claimed_by !== 0) {
            return response()->json("Dieser Wunsch wurde bereits von jemandem reserviert.", 400);
        }

        if($wish->owner_id === $request->user()->id) {
            return response()->json("Du willst dich selbst beschenken? Lass mal lieber...", 400);
        }

        $wish->claimed_by = $request->user()->id;
        $wish->save();

        return response()->json("Wunsch " . $wish->id . " erfolreich reserviert.", 200);
    }

    function Wishlist(Request $request) {
        return Wish::where("claimed_by", 0)->where("owner_id", "!=", $request->user()->id)->get();
    }
}