gists for blog post on Pinatra (PHP Sinatra clone) as a tool for learning

after.php

Pinatra::after('*', function () {
  Logger::log_request('served yet another request');
});

before.php

Pinatra::before('*', function () {
  header('AppVersion: 0.0.1');
});

get.php

Pinatra::get('/hi', function () {
  return 'hello world';
});

get_with_data.php

Pinatra::get('/hello/:name', function($name) {
  return $this->json([
    'key' => 'hello-route has been matched!', 
    'name' => $name
  ]);
});

handle_request.php

  /**
   * Method that is called when we actually want to process an incoming
   * request based on the method and uri provided. This method (expecting
   * to be given a URI and method) can also be used for re-routing requests
   * internally.
   */
public static function handle_request($method, $uri) {
  $app = Pinatra::instance();


  // before hook code (removed for brevity)

  // find and call route-handler
  $route_match = $app->find_route($app->routes, $method, $uri);
  if ($route_match !== null) {
      
    $request_body_data = $app->get_body_data($method);
    if ($request_body_data !== null) {
      array_unshift($route_match['arguments'], $request_body_data);
    }

    $route_res = call_user_func_array(
      $route_match['callback']->bindTo($app), 
      $route_match['arguments']);
  }

  // after hook code (removed for brevity)
  
}

pinatra_get.php

public static function get($match, $callback) {
  $app = Pinatra::instance();
  $app->register('get', $match, $callback);
}

pinatra_regex.php

private $URIParser_PLACEHOLDER = '([^\/]+)';
private $URIParser_GLOB = '.*?';

/**
 * Private: Generate a PHP (Perl) regular expression given the
 *          Sinatra-style expression in the get/post/put/etc. functions.
 */
private function compute_regex($match) {
  // get the URI parts of the match-pattern given
  $parts = array_filter(explode('/', $match), function ($val) { 
    return !empty($val);
  });

  // build our pattern-matching regex from given route
  $regex= '/^';

  foreach ($parts as $part) {
    if ($part[0] === ':') {
      $regex .= '\/' . $this->URIParser_PLACEHOLDER;
    }
    else if ($part[0] === '*'){
      $regex .= '\/' . $this->URIParser_GLOB;
    }
    else {
      $regex .= '\/' . $part;
    }
  }
  $regex .= '\/?$/';
  return $regex;
}

pinatra_register.php

private function register($method, $match, $callback) {
  $match = $this->compute_regex($match);
  $this->routes[$method][$match] = $callback;
}

post.php

Pinatra::post('/name', function ($data) {
  return 'Hello ' . $data['name'];
});