<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Cache;

class PreventDuplicateRequests
{

    /**
     * Handle an incoming request.
     *
     * @param \Illuminate\Http\Request $request
     * @param \Closure(\Illuminate\Http\Request): (\Illuminate\Http\Response|\Illuminate\Http\RedirectResponse) $next
     *
     * @return \Illuminate\Http\Response|\Illuminate\Http\RedirectResponse
     */
    public function handle(Request $request, Closure $next)
    {
        $key = 'req_' . md5($request->fullUrl() . serialize($request->all()));

        if (Cache::has($key)) {
            return response()->json(['error' => 'Duplicate request'], 429);
        }

        Cache::put($key, true, now()->addSeconds(1));

        return $next($request);
    }

}