通过用户ID而不是角色的ACL（访问控制列表）代码生成器

Question

I tried to create ACL (access control list) but per user id, not by role because the client wants that same level but has different permission

how I can check if the user accessing a method or controller that don't have permission in database

here is table permissions structure

+------------------------+--------------+------+-----+---------+----------------+
| Field                  | Type         | Null | Key | Default | Extra          |
+------------------------+--------------+------+-----+---------+----------------+
| permission_id          | int(11)      | NO   | PRI | NULL    | auto_increment |
| permission_name        | varchar(255) | NO   |     | NULL    |                |
| permission_desc        | text         | YES  |     | NULL    |                |
| permission_created_at  | datetime     | YES  |     | NULL    |                |
| permission_modified_at | datetime     | YES  |     | NULL    |                |
+------------------------+--------------+------+-----+---------+----------------+

then, permissions table has relation with permission_role table and here is permission_role 's structure

+--------------------+---------+------+-----+---------+----------------+
| Field              | Type    | Null | Key | Default | Extra          |
+--------------------+---------+------+-----+---------+----------------+
| permission_role_id | int(11) | NO   | PRI | NULL    | auto_increment |
| user_id            | int(11) | NO   | MUL | NULL    |                |
| permission_id      | int(11) | NO   | MUL | NULL    |                |
+--------------------+---------+------+-----+---------+----------------+

now, I am confused if the user accesses a controller that the user doesn't have permissions to access it, how I can check it? if check by route or URI but my database didn't save class controller ... Any solution please ?

Thank you, and sorry for my bad English

Answer 1

Assuming Branch .etc. is the controller and view , edit are methods with your storage system you would have to do:

class Branch extends CI_Controller {

     public function view {
         $this->acl->can_access(6);
     }

     public function edit {
         $this->acl->can_access(9);
     }
}

Acl Model:

class Acl extends CI_Model {

     public function can_access($permission_id = null) {
         $uid = $this->session->userdata('user_id');
         if (!is_null($uid) && !is_null($permission_id)) {
             $this->db->where('user_id', $uid);
             $this->db->where('permission_id', $permission_id);
             $this->db->from('permissions_role');
             if ($this->db->count_all_results() > 0) {
                 return;
             }
         }
         show_error('Not allowed'); // function exits
     }

}

If you refactored your db structure to contain both your controller/method in the permission table you wouldn't have to include can_access in every auth method and could just have your controllers extend a MY_Controller with code that looks like:

class MY_Controller extends CI_Controller {

    public function __construct() {
        parent::__construct();
        $this->can_access();
    }

    private function can_access() {
        $controller = $this->router->class;
        $method = $this->router->method;
        $curr_user = $this->session->userdata('user_id');
        // do join between permissions and permissions role...
        // check if num_rows > 0 for current user given the controller/method
        // if num_rows is not greater than 0 (user doesn't have permission)
        // then show error. otherwise do nothing (user has permission)
    }

}