generate_jwt.php

<?php

require_once 'classes/sdk/firebase/php-jwt/src/BeforeValidException.php';
require_once 'classes/sdk/firebase/php-jwt/src/ExpiredException.php';
require_once 'classes/sdk/firebase/php-jwt/src/SignatureInvalidException.php';
require_once 'classes/sdk/firebase/php-jwt/src/JWT.php';

use \Firebase\JWT\JWT;

/**
 * Clase para generar JWT
 */
class jwt_generator
{
    private $key;
    private $iss;
    private $aud;

    /**
     * Constructor
     */
    public function __construct()
    {
        $this->key = get_config_bbdd('jwt_authentication_key');
        $this->iss = "auth"; // Creador del JWT
        $this->aud = "kikegarcia"; // Audiencia
    }

    /**
     * Genera JWT con los datos de usuario
     * @param  [type] $userData [description]
     * @return [type]           [description]
     */
    public function generate_jwt($userData)
    {
        // Hora de creación
        $dateObject = new DateTime();
        $creationDate = $dateObject->getTimestamp();

        // Hora de caducidad (+8H)
        $expirationDateObject = $dateObject->add(new DateInterval('PT8H'));
        $expirationDate = $expirationDateObject->getTimestamp();

        $tokenPayloads = array(
            "iss"       => $this->iss,
            "aud"       => $this->aud,
            "iat"       => $creationDate,
            "exp"       => $expirationDate
        );

        $finalPayloads = $tokenPayloads + $userData;

        $jwt = JWT::encode($finalPayloads, $this->key, 'HS256');

        return $jwt;
    }
}