workorder/application/models/Token_model.php

<?php

class Token_model extends CI_Model{
    private $collection_name = 'token';

    public function __construct()
    {
        parent::__construct();
    }

    private $model = array(
        "token" =>"",
        "expires_time" => ""
    );

    public function get_model(){
        return $this->model;
    }

    public function find_token($token,$time)
    {
        $this->clear_token($time);
        $token_info = $this->mongo_db->where("token", $token)->where_gt("expires_time", $time)->find_one($this->collection_name);
        return $token_info;
    }

    public function clear_token($time){
        return $this->mongo_db->where_lt("expires_time", $time)->delete_all($this->collection_name);
    }

    public function save_token($token){
        return $this->mongo_db->insert($this->collection_name,$token);
    }

    public function delete_token($token){
        return $this->mongo_db->where("token",$token)->delete($this->collection_name);
    }
}