<?php

namespace Models {

  require_once 'Config/Settings.class.php';

  require_once 'External/PHP-JWT/src/JWT.php';

  class User {
    //
    public $ID;
    public $firstname;
    public $lastname;
    public $email;
    public $type;

    /**
     * 
     */
    public function __construct() {
      $this->reset();
    }

    /**
     * 
     */
    protected function reset() {
      $this->ID = 0;
      $this->firstname = '';
      $this->lastname = '';
      $this->email = '';
      $this->type = '';
    }

    /**
     * 
     */
    public function logout() {
      $this->reset();
    }

    /**
     * Check provided JWT token.
     */
    public function checkToken() {
      $authHeader = $_SERVER['HTTP_AUTHORIZATION'];
      $arr = explode(" ", $authHeader);
      if(count($arr) == 2) {
        $jwt = $arr[1];
        if($jwt) {
          try {
            $decoded = \Firebase\JWT\JWT::decode($jwt, \Config\Settings::getTokenPrivateKey(), array('HS256'));
            $this->ID = $decoded->data->ID;
            $this->firstname = $decoded->data->firstname;
            $this->lastname = $decoded->data->lastname;
            $this->email = $decoded->data->email;
            $this->type = $decoded->data->type;

            // Update token
            $issuedat_claim = time(); // issued at
            $expire_claim = $issuedat_claim + \Config\Settings::getTokenExpiration();            
            $decoded->iat = $issuedat_claim;
            $decoded->exp = $expire_claim;
            return \Firebase\JWT\JWT::encode($decoded, \Config\Settings::getTokenPrivateKey());
          }
          catch ( \Firebase\JWT\ExpiredException $e ) {
            throw new \Exception('Access denied.');
          }
          catch (\Exception $e){
            throw new \Exception('Access denied.');
            /*return json_encode(Array(
              "result" => "ERROR",
              "message" => "Access denied",
              "data" => $e->getMessage()
            ));*/
          }
        }
        else {
          throw new \Exception('Access denied.');
        }
      }
      else {
        throw new \Exception('Access denied.');
      }
      return false;
    }
  }

}

?>