laravel-api-simple-blog/app/Http/Controllers/UserController.php

<?php

namespace App\Http\Controllers;

use App\Models\User;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Validator;
use Symfony\Component\HttpFoundation\Exception\BadRequestException;

class UserController extends Controller
{
    // GET /user
    public function index()
    {
        return response(User::all());
    }

    // GET /user/{id}
    public function show(string $id)
    {
        // FIXME: is there more shorter
        // validation solution
        $v = Validator::make(["id" => $id], [
            "id" => 'integer'
        ]);

        if ($v->fails())
            throw new BadRequestException();

        $user = User::query()->findOrFail($id);

        return response($user);
    }

    // POST /user
    public function store(Request $request)
    {
        return response("Create user");
    }

    // PUT /user/{id}
    public function update(Request $request, string $id)
    {
        return response("Update user " . $id);
    }

    // DELETE /user/{id}
    public function destroy(string $id)
    {
        return response("Destroy user " . $id);
    }
}