<?php if (!defined('BASEPATH')) exit('No direct script access allowed');

/**
 * Library for handling all user-related operations
 *
 */
class Auth
{

	private $CI = null;

	function __construct(){
		$this->CI = & get_instance();
		$this->CI->load->library('native_session');
	}

	/**
	 * Handles login operation
	 *
	 * @param string $email
	 * @param string $password
	 * @return mixed
	 */
	function login($email = null, $password = null) {
		if (is_null($email) && is_null($password)) {
			$email = $this->CI->input->post('email');
			$password = $this->CI->input->post('password');
		}

		$this->CI->load->model("UserModel");
		$user = $this->CI->UserModel->findUser($email, $password);
		if ($user) {
			$this->CI->UserModel->logLastLogin($user->id, $this->CI->input->ip_address());
			return $this->setUserData($user);
		} else {
			return false;
		}
	}

	/**
	 * Handles logout operation
	 *
	 */
	function logout() {
		$this->CI->native_session->sess_destroy();
	}

	/**
	 * Set user's profile information into session
	 *
	 * @param array $user
	 * @return array
	 */
	public function setUserData($user) {
		unset($user["pasword"]);
		$this->CI->native_session->set_item('user', $user);
		$this->CI->native_session->set_item('loginTime', time());
		return $user;
	}

	/**
	 * Retrieves user's information. Can return full array or just a single value by key
	 *
	 * @param string $key
	 * @return mixed
	 */
	function user($key = null) {
		$user = $this->CI->native_session->get_item("user");
		if ($user && !is_null($key)) {
			return isset($user->$key) ? $user->$key : null;
		} else {
			return $user;
		}
	}

}