<?php
namespace Contabilidad\Common\Controller;

use Psr\Http\Message\ServerRequestInterface as Request;
use Psr\Http\Message\ResponseInterface as Response;
use ProVM\Common\Define\Controller\Json;

class Base {
  use Json;

  public function __invoke(Request $request, Response $response): Response {
    return $this->withJson($response, []);
  }
  public function generate_key(Request $request, Response $response): Response {
    $server_addr = explode('.', $request->getServerParams()['SERVER_ADDR']);
    $remote_addr = explode('.', $request->getServerParams()['REMOTE_ADDR']);
    for ($i = 0; $i < 3; $i ++) {
      if ($server_addr[$i] != $remote_addr[$i]) {
        throw new \InvalidArgumentException('Invalid connection address.');
      }
    }
    $salt = mt_rand();
    $signature = hash_hmac('sha256', $salt, 'contabilidad', true);
    $key = urlencode(base64_encode($signature));
    return $this->withJson($response, ['key' => $key]);
  }
}