KI/common/Controller/Web/Admin/Faq.php

<?php
namespace ProVM\KI\Common\Controller\Web\Admin;

use Psr\Container\ContainerInterface as Container;
use Psr\Http\Message\ServerRequestInterface as Request;
use Psr\Http\Message\ResponseInterface as Response;
use ProVM\KI\Common\Alias\View;

class Faq {
  public function __invoke(Request $request, Response $response, View $view, Container $container) {
    $filename = implode(DIRECTORY_SEPARATOR, [
      $container->get('folders.data'),
      'faqs.json'
    ]);
    $faqs = json_decode(trim(file_get_contents($filename)));
    return $view->render($response, 'admin.faq', compact('faqs'));
  }
  public function add(Request $request, Response $response, Container $container) {
    $post = $request->getParsedBody();
    $filename = implode(DIRECTORY_SEPARATOR, [
      $container->get('folders.data'),
      'faqs.json'
    ]);
    $faqs = json_decode(trim(file_get_contents($filename)));

    $faq = (object) [
      'titulo' => '',
      'contenido' => ''
    ];
    if (isset($post['id']) and isset($faqs[$post['id']])) {
      $faq = $faqs[$post['id']];
    }

    $changed = false;
    foreach ($faq as $k => $v) {
      if ($v != $post[$k]) {
        $faq->$k = $post[$k];
        $changed = true;
      }
    }

    if (isset($post['id'])) {
      $faqs[$post['id']] = $faq;
    } else {
      $faqs []= $faq;
    }

    $status = false;
    if ($changed) {
      $faqs = array_values($faqs);
      $status = (file_put_contents($filename, json_encode($faqs, \JSON_PRETTY_PRINT  | \JSON_UNESCAPED_UNICODE | \JSON_UNESCAPED_SLASHES)) !== false);
    }

    $output = [
      'informacion' => $post,
      'estado' => $status,
      'faqs' => $faqs
    ];
    $response->getBody()->write(json_encode($output));
    return $response
      ->withHeader('Content-Type', 'application/json')
      ->withStatus(201);
  }
  public function delete(Request $request, Response $response, Container $container) {
    $post = $request->getParsedBody();
    $filename = implode(DIRECTORY_SEPARATOR, [
      $container->get('folders.data'),
      'faqs.json'
    ]);
    $faqs = json_decode(trim(file_get_contents($filename)));

    $status = false;
    if (isset($post['id']) and isset($faqs[$post['id']])) {
      unset($faqs[$post['id']]);

      $faqs = array_values($faqs);
      $status = (file_put_contents($filename, json_encode($faqs, \JSON_PRETTY_PRINT  | \JSON_UNESCAPED_UNICODE | \JSON_UNESCAPED_SLASHES)) !== false);
    }

    $output = [
      'informacion' => $post,
      'estado' => $status,
      'faqs' => $faqs
    ];
    $response->getBody()->write(json_encode($output));
    return $response
      ->withHeader('Content-Type', 'application/json')
      ->withStatus(201);
  }
}