building an efficient admin control panel

[eluser]sandwormusmc[/eluser]
Ok, this is pretty complex, but I think it's a flexible and powerful solution:

Calling the MyAuth Class from the main controller:

Code:

/*
    Originally coded by Charlie Dumont for Detroit Public Schools - Summer 2007
    Modified and completed for Detroit Public Schools by Matt Moldvan - Fall 2007
*/
        $this->params = array(
            'AppName'    => 'UAMS',
            'AuthMethod' => 'LDAPAuth',
            'RolesBased' => FALSE, // SET TO TRUE TO CHECK ROLES
            'RolesType'  => 'LocalRoles'
        );
        $this->load->library('MyAuth', $this->params);

MyAuth Class (allows for different "AuthTypes" which dictates which custom auth library it will call, we are using LDAP at our site):

Code:

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

/*
    Originally coded by Charlie Dumont for Detroit Public Schools - Summer 2007
    Modified and completed for Detroit Public Schools by Matt Moldvan - Fall 2007
*/

class MyAuth {
    public $CI;
    public $isRoles;
    public $authFailure = '';
    protected $authType;
    protected $params;
    protected $callingFunction;
    private $roles;
    private $userArray;
    private $username;
    private $password;

    public function __construct($params) {
        $this->CI=&get;_instance();
        $this->params = $params;
        // print_r($this->CI=& get_instance());
        /*echo '<pre>';
        print_r($this->CI);
        echo '</pre>';*/
        $authMethod = $params["AuthMethod"];
        $this->CI->load->library($authMethod);
        // this kludginess is because CI insists that libraries be all lowercase when called
        $authMethod = strtolower ($authMethod);
        $this->authType =& $this->CI->$authMethod;
        // if Roles based we load the roles class and set a static variable
        if ($params['RolesBased']) {
            $this->isRoles = TRUE;
            $this->_loadRoles();
        }
        $this->username=$this->CI->input->post("username");
        $this->password=$this->CI->input->post("password");
    }

    public function check($path='') {
        // Find the calling function for roles based validation
        $backtrace = debug_backtrace();
        $this->callingFunction = $backtrace[1]['function'];
        $username = $this->CI->input->post("username");
        $params=array('username'=>$username);
        $this->_setUserArray($params);

        // Check session, cookie, or post variables
        if ($this->_isValidSession() || $this->_isValidLogin()) {
            $username = $this->CI->session->userdata('username');
            if ($this->isRoles) {
                // echo "<br />checking roles";
                $this->CI->roles->checkRoleAgainstAction($this->callingFunction, $this->CI->session->userdata('role'));
            }
            $params=array(
              'username'=>$username,
              'prevAction'=>'login',
              'action'=>'default',
              'loggedIn'=>TRUE
            );
            $this->_setUserArray($params);
            return TRUE;
        }
        // echo "this is the calling function: " . $backtrace[1]['function'] . " and this is the URI Path:$path";

        // if not available or valid offer login screen

        $data = array(
            'actionPath' =>$path,
            'error'      =>$this->authFailure,
            'header'     =>$this->CI->load->view($this->params['AppName'].'_header','',true),
            'footer'     =>$this->CI->load->view($this->params['AppName'].'_footer','',true)
        );

        $this->CI->load->vars($data);
        $this->CI->load->view('login.php',$data);
        $string = $this->CI->output->get_output();
        $this->CI->output->set_output($string);
        // $this->CI->load->view($this->params['AppName'] . '_footer');
        exit($string);
    }

    public function logout() {
        $newdata = array(
          'username' => 0,
          'action'   => 'default',
          'loggedIn' => FALSE
        );

        $this->_setUserArray($newdata);
        $this->CI->load->view('logout');
    }

    public function get_username() {
        return $this->CI->session->userdata('username');
    }

    public function get_role() {
        return $this->CI->session->userdata('role');
    }

    private function _loggedIn() {
        return $this->CI->session->userdata('loggedIn');
    }

    private function _isValidSession() {
        if($this->CI->session->userdata('loggedIn')) {
            return TRUE;
        }
        else {
            return FALSE;
        }
    }

    private function _isValidLogin() {
        $username = $this->CI->input->post("username");
        $password = $this->CI->input->post("password");

        if (strlen($username) < 1) {
            return FALSE;
        }

        if ($this->authType->verifyLogin($username, $password) ) {
            return TRUE;
        }
        else {
            $this->authFailure='There was a problem with your LDAP credentials.';
            return FALSE;
        }
    }

    private function _setUserArray($params) {
        if ($this->isRoles) {
            $role = $this->CI->roles->getUserRole($username);
            $params['role']=$role;
        }
        $this->CI->session->set_userdata($params);
    }

    private function _loadRoles() {
        $this->CI->load->library("Roles", $this->params);
    }
}
?&gt;

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