<?php

/*

* @Package Quick Authentication Library

* @author David Blencowe

* @link http://www.syntaxmonster.net

* @version 1.0.0

* @since Version 1.0.0

*/

class Quickauth

{

    var $CI;

    var $_username;

	var $_language=1;// global variable for handling language

    var $_table = array(

                    'users' => 'sm_users',

                    'groups' => 'sm_user_groups'

                    );



    function __construct()

    {

        $this->CI =& get_instance();

        $this->CI->load->helper('url');

        $this->CI->load->helper('email');

        $this->CI->load->helper('string');

	}



	function is_maintain(){

		$setting =  $this->CI->db->get_where('tbl_config', array('maintenance_enabled' => 1))->row_object();

		if(is_object($setting) && $setting->maintenance_enabled == 1){

			redirect('maintenance');

		}

	}

	

	function is_maintain_mode(){

		$setting =  $this->CI->db->get_where('sm_config', array('maintenance_enabled' => 1))->row_object();

		

		if(is_object($setting) && $setting->maintenance_enabled == 1){

			return true;

		}else{

			return false;	

		}

	}

	

    function Quickauth()

    {

        self::__construct();

    }

	function has_role($only_for_administrator = true, $only_for_user = false){

		if ($this->CI->session->userdata('logged_in') == FALSE)

		{

			redirect('login');

		}

		else

		{	

			if($this->CI->session->userdata('group_id') != 3){

				if($only_for_administrator){

					redirect('membros');	

				}

			}else if($only_for_user){

				redirect('admin/pages');	

			}

		}

	}

		

	function is_admin(){

		if($this->CI->session->userdata('group_id') == 1){

			return true;	

		}else{

			return false;

		}

	}

	

	function is_supportor(){

		if($this->CI->session->userdata('group_id') == 2){

			return true;	

		}else{

			return false;

		}

	}	

	

	function redirect_out_admin(){

		redirect(base_url().'user/login');

	}

	

	// -----------------------------------------------------------------------------------------

	

	/**

    * Check the database too see if the user email that is passed to the function exists.

    * @param String $email

	* @param Integer $user_id , by default it will be zero

    * @return TRUE/FALSE

    */

    function _useremail_exists($email,$user_id=0){

        $this->CI->db->where('email', $email);

		//if user id provided

		if($user_id > 0){

			$this->CI->db->where('id <>', $user_id);

		}

        $this->CI->db->limit(1);

        $query = $this->CI->db->get($this->_table['users']);



        if ($query->num_rows() !== 1){

            return FALSE;

        }else{

			return TRUE;

        }

    }

	

	// -----------------------------------------------------------------------------------------

	

	/**

    * Check the config file to see if the current language.

    * If it does then it is set to the global $_username variable for later use

    * 

    * @return $lan_id

    */	

	function _get_language_code(){

		$lan_id		=	0;

		$cur_lanhuage=$this->CI->config->item('admin_language');

		if($cur_lanhuage	==	'english'){

			$lan_id				=	1;

			$this->_language	=	$lan_id;

		}else if($cur_lanhuage	==	'portuguese'){

			$lan_id				=	2;

			$this->_language	=	$lan_id;

		}

		

		return $lan_id;

		

	}

	

	// -----------------------------------------------------------------------------------------

	

    /**

    * Used for restricting users to certain controllers and functions

    * by their user level.

    * @param String $restrict_to Name of the group

    * @return TRUE/Error

    */

    function restrict( $restrict_to = NULL, $redirect_to_login = FALSE )

    {

        if ( $restrict_to !== NULL)

        {

            if ($this->CI->session->userdata('logged_in') == TRUE)

            {

                $this->CI->db->where('id', $restrict_to);

                $query = $this->CI->db->get($this->_table['groups']);

                $level = $query->row_array();

                $users_level = $this->CI->session->userdata('group_id');



                if ($users_level >= $level['id'])

                {

                    return TRUE;

                }

                else

                {

                    redirect('/admin/');

                }

            }

            else

            {

               redirect("/admin/");

            }

        }

        else

        {

            // Page locked to everyone

            show_error($this->CI->lang->line('access_denied'));

        }

    }

	

	// -----------------------------------------------------------------------------------------



    /**

    * Check the database too see if the username that is passed to the function exists.

    * If it does then it is set to the global $_username variable for later use

    * @param String $username

    * @return TRUE/FALSE

    */

    function _username_exists( $username )

    {

        $this->CI->db->where('username', $username);

        $this->CI->db->limit(1);

        $query = $this->CI->db->get($this->_table['users']);



        if ($query->num_rows() !== 1)

        {

            return FALSE;

        }

        else

        {

            $this->_username = $username;

            return TRUE;

        }

    }

	

	// -----------------------------------------------------------------------------------------



    /**

    * Encrypts the submitted password and then checks it in the database

    * using the value of the global $_username variable. If True is returned

    * then the username and password submitted by the user are correct and they

    * should then get logged in (See login function)

    * @param String $password

    * @return TRUE/FALSE

    */

    function _check_correct_password( $password )

    {

        $this->CI->db->select('password');

        $this->CI->db->where('username', $this->_username);

        $this->CI->db->limit(1);

        $query = $this->CI->db->get($this->_table['users']);

        $result = $query->row();



        if ($result->password == $this->encrypt($password))

        {

            return TRUE;

        }

        else

        {

            return FALSE;

        }

    }

	

	// -----------------------------------------------------------------------------------------



    /**

    * Returns the number of characters in a string after it has been trimemd for

    * whitespace.

    * @param String $string

    * @return Int

    */

    function check_string_length( $string )

    {

        $string = trim($string);

        return strlen($string);

    }

	

	// -----------------------------------------------------------------------------------------



    /**

    * This function will encrypt any data passed to it.

    * It is primarily used for encrypting passwords before

    * querying the database.

    * @param String $data

    * @return String

    */

    function encrypt( $data )

    {

        if ($this->CI->config->item('encryption_key') !== NULL)

        {

            return sha1($this->CI->config->item('encryption_key').$data);

        }

        else

        {

            show_error('Please set an encryption key in your config file. <a href="javascript:history.back();">back</a>');

        }

    }

	

	// -----------------------------------------------------------------------------------------



    /**

    * Check if a user is logged in

    *

    * @access public

    * @param string

    * @return bool

    */

    function logged_in()

    {

        return $this->CI->session->userdata('logged_in');

    }

	

	// -----------------------------------------------------------------------------------------



    /**

    * Log a user out (destroy all session variables)

    *

    * @access public

    */

    function logout()

    {

		$this->CI->session->sess_destroy();

    }

	

	// -----------------------------------------------------------------------------------------



    /**

    * This function will get the currently selected template theme

    *

    * @access public

	* @return string template name

    */

    function get_current_template_css(){

		$template_id	=	0;

		$this->CI->db->select('template');

        $query = $this->CI->db->get('sm_config');

        $result = $query->row();

		// check the sm_config for seleted template if template set the get template id from there else set template is as 1

		if ($query->num_rows() !== 1){

			$template_id	=	1;

		}else{

			$template_id	=	$result->template;

		}

		

		// if template id is zero then make it as one for getting default template 		

		if($template_id < 1){

			$template_id	=	1;			

		}

		

		//get the template name from table sm_template_css

		$this->CI->db->select('template_css');

		$this->CI->db->where('id', $template_id);

        $query = $this->CI->db->get('sm_template_css');

        $result = $query->row();

		if ($query->num_rows() !== 1){

			return 'none';

		}else{

			return $result->template_css;

		}		

    }

	

	 /**

    * This function will get the currently  copy right text 

    *

    * @access public

	* @return string copy right text 

    */

    function get_copy_right_text(){

		$language_id	=	$this->_get_language_code();

		$this->CI->db->select('copy_right_text');

		$this->CI->db->where('language', $language_id);

        $query	=	$this->CI->db->get('sm_config');

        $result	=	$query->row();

		if ($query->num_rows() !== 1){

			return 'none';

		}else{

			return $result->copy_right_text;

		}		

    }

	

}



/* End of file Quickauth.php */

/* Location: ./application/libraries/Quickauth.php */