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This file houses a Middleware that checks and validates a JWT token.
<?php
namespace App;
use Firebase\JWT\JWT;
use Exception;
use App\TokenModel;
use App\UserModel;
/**
* JwtMiddleware - The JwtMiddleware. This Controller makes use of a few Models, Classes and packages for authenticating requests....
*
* @author Ilori Stephen A <stephenilori458@gmail.com>
* @link https://github.com/learningdollars/php-rest-api/App/Middleware/JWTMiddleware.php
* @license MIT
*/
class JwtMiddleware {
protected static $user;
protected static $token;
protected static $user_id;
/**
* JWTSecret
*
* Returns a JWT Secret...
*
* @param void
* @return string
*/
private static function JWTSecret()
{
return 'K-lyniEXe8Gm-WOA7IhUd5xMrqCBSPzZFpv02Q6sJcVtaYD41wfHRL3';
}
/**
* getToken
*
* Fetches and return the JWT Token from the request Header
*
* @param void
* @return string
*/
protected static function getToken()
{
Self::$token = $_SERVER['HTTP_AUTHORIZATION'];
return $_SERVER['HTTP_AUTHORIZATION'];
}
/**
* validateToken
*
* Validates the JWT Token and returns a boolean true...
*
* @param void
* @return boolean
*/
protected static function validateToken()
{
Self::getToken();
if (Self::$token == '' || Self::$token == null) {
return false;
}
try {
$Token = explode('Bearer ', Self::$token);
if (isset($Token[1]) && $Token == '') {
return false;
}
return $Token[1];
} catch (Exception $e) { return false; }
}
/**
* getAndDecodeToken
*
* Decodes and returns a boolean true or the user_id.
*
* @param void
* @return mixed
*/
public function getAndDecodeToken()
{
$token = Self::validateToken();
try {
if ($token !== false) {
// Query the database for the token and decode it....
$TokenModel = new TokenModel();
// Check the database for the query before decoding it...
$tokenDB = $TokenModel::fetchToken($token);
if ($tokenDB['status']) {
// decode the token and pass the result on to the controller....
$decodedToken = (Array) JWT::decode($token, Self::JWTSecret(), array('HS256'));
if (isset($decodedToken['user_id'])) {
Self::$user_id = $decodedToken['user_id'];
return $decodedToken['user_id'];
}
return false;
}
return false;
}
return false;
} catch (Exception $e) {
return false;
}
}
/**
* getUser
*
* Fetches the user ID from the JWT Token and returns a User Array.
*
* @param void
* @return array
*/
public function getUser()
{
try {
$UserModel = new UserModel();
$user = $UserModel::fetchUserById(Self::$user_id);
if ($user['status']) {
return $user['data'];
}
return [];
} catch (Exception $e) { return []; }
}
}
?>
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