<?php
    class authHelper{
        protected $sessionHelper, $redirectorHelper, $tableName, $userColumn,
                  $passColumn, $user, $pass, $loginController = 'index', $loginAction = 'index',
                  $logoutController = 'index', $logoutAction = 'index';

        public function __construct(){
            $this->sessionHelper = new SessionHelper();
            $this->redirectorHelper = new RedirectorHelper();
            return $this;
        }

        public function setTableName( $val ){
            $this->tableName = $val;
            return $this;
        }

        public function setUserColumn( $val ){
            $this->userColumn = $val;
            return $this;
        }

        public function setPassColumn( $val ){
            $this->passColumn = $val;
            return $this;
        }

        public function setUser( $val ){
            $this->user = $val;
            return $this;
        }

        public function setPass( $val ){
            $this->pass = $val;
            return $this;
        }

        public function setLoginControllerAction( $controller, $action ){
            $this->loginController = $controller;
            $this->loginAction = $action;
            return $this;
        }

        public function setLogoutControllerAction( $controller, $action ){
            $this->logoutController = $controller;
            $this->logoutAction = $action;
            return $this;
        }

        public function login(){
            $db = new Model();
            $db->_tabela = $this->tableName;
            $where = $this->userColumn."='".$this->user."' and ".$this->passColumn."='".md5($this->pass)."'";
            $sql = $db->read($where, '1');

            if ( count($sql) > 0 ):
                $this->sessionHelper->createSession("userAuth", true)
                                    ->createSession('userData', $sql[0]);
            else:
                die("Usuario nao existe.");
            endif;

            $this->redirectorHelper->goToControllerAction($this->loginController, $this->loginAction);
            return $this;
        }

        public function logout(){
            $this->sessionHelper->deleteSession("userAuth")
                          ->deleteSession("userData");
            $this->redirectorHelper->goToControllerAction($this->logoutController, $this->logoutAction);
            return $this;
        }

        public function checkLogin( $action = "boolean" ){
            switch ($action) {
                case "boolean":
                    if ( !$this->sessionHelper->checkSession("userAuth") )
                        return false;
                    else
                        return true;
                    break;
                case "redirect":
                    if ( !$this->sessionHelper->checkSession("userAuth") )
                        if ( $this->redirectorHelper->getCurrentController() != $this->loginController || $this->redirectorHelper->getCurrentAction() != $this->loginAction )
                            $this->redirectorHelper->goToControllerAction($this->loginController, $this->loginAction);
                    break;
                case "stop":
                    if ( !$this->sessionHelper->checkSession("userAuth") )
                        exit;
                    break;
            }
            return $this;
        }

        public function userData( $key ){
            $s = $this->sessionHelper->selectSession("userData");
            return $s[$key];
        }
    }