Codeigniter 2.x - Authentication + ACL library - php

Question

I need a Codeigniter 2.x ACL + Authentication library.
I need to give have 3 different admin users and 2 different front end users and want to set everything dynamically through database.
Please help.

Answer 1

The two most popular authentication libraries for CI (at least as of early this year) seemed to be Ion_auth and Tank_auth. Neither handle your ACL needs, though Ion_auth provides single group functionality.
I started with Tank_auth on a project several months ago, but switched to Ion_auth when I needed more flexibility. With it's included functionality, I added a user_groups table and the necessary library and model functions to allow multiple group memberships for each user.
The data structure:
mysql> describe auth_users_groups;
+------------+-----------------------+------+-----+-------------------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------+-----------------------+------+-----+-------------------+----------------+
| id | int(11) unsigned | NO | PRI | NULL | auto_increment |
| user_id | mediumint(8) unsigned | NO | | NULL | |
| group_id | mediumint(8) unsigned | NO | | NULL | |
| dt_updated | timestamp | NO | | CURRENT_TIMESTAMP | |
+------------+-----------------------+------+-----+-------------------+----------------+
4 rows in set (0.00 sec)
Some of the code added in the library:
public function get_user_groups($user_id = NULL)
{
if ($user_id === NULL) $user_id = $this->get_user()->id;
return $this->ci->ion_auth_model->get_user_groups($user_id)->result();
}
/**
* is_member - checks for group membership via user_groups table
*
* #param string $group_name
* #return bool
**/
public function is_member($group_name)
{
$user_groups = $this->ci->session->userdata('groups');
if ($user_groups)
{
// Go through the groups to see if we have a match..
foreach ($user_groups as $group)
{
if ($group->name == $group_name)
{
return true;
}
}
}
// No match was found:
return false;
}
Some of the model code:
public function get_user_groups($user_id = NULL)
{
if ($user_id === NULL) return false;
return $this->db->select('group_id, name, description, dt_updated')
->join($this->tables['groups'], 'group_id = '.$this->tables['groups'].'.id', 'left')
->where('user_id', $user_id)
->get($this->tables['users_groups']);
}
public function set_group($user_id, $group_id)
{
$values = array('user_id'=>$user_id, 'group_id'=>$group_id);
$hits = $this->db->where($values)->count_all_results($this->tables['users_groups']);
if ($hits > 0)
{
return NULL;
}
return $this->db->insert($this->tables['users_groups'], $values);
}
public function remove_groups($user_id, $group_ids)
{
$this->db->where('user_id', $user_id);
$this->db->where_in('group_id', $group_ids);
return $this->db->delete($this->tables['users_groups']);
}