Module Help: Sort by date

function clicks_ajax_filter()
    {
        $this->EE->output->enable_profiler(FALSE);
        $this->EE->load->helper('text');
        //$this->EE->load->model('search_model');
        $this->EE->load->model('comment_model');
        $ids = array();
        
                
        $col_map = array('entry_id', 'title', 'totalclicks');

        // Note- we pipeline the js, so pull more data than are displayed on the page        
        $perpage = $this->EE->input->get_post('iDisplayLength');
        $offset = ($this->EE->input->get_post('iDisplayStart')) ? $this->EE->input->get_post('iDisplayStart') : 0; // Display start point
        $sEcho = $this->EE->input->get_post('sEcho');

        
        /* Ordering */
        $order = array();
        
        if ($this->EE->input->get('iSortCol_0') !== FALSE)
        {
            for ( $i=0; $i < $this->EE->input->get('iSortingCols'); $i++ )
            {
                if (isset($col_map[$this->EE->input->get('iSortCol_'.$i)]))
                {
                    $order[$col_map[$this->EE->input->get('iSortCol_'.$i)]] = ($this->EE->input->get('sSortDir_'.$i) == 'asc') ? 'asc' : 'desc';
                }
            }
        }

        $filter = $this->filter_settings($ajax = TRUE);
        
        //  Get clicks
                $this->EE->db->select('t.entry_id, t.title, COUNT(icc.click_id) as total_clicks');
        $this->EE->db->from('channel_titles as t');
        $this->EE->db->join('im_clicktracker_clicks as icc', 'icc.entry_id = t.entry_id','left');
        //$this->EE->db->join('categories as cat', 'cat.cat_id = icc.cat_id','left');
        $this->EE->db->where('t.channel_id');
        $this->EE->db->group_by('t.entry_id');
        //$this->EE->db->limit(10);
        $click_query = $this->EE->db->get($filter, '', $order);  
        
        $clicks =  array_slice($click_query->result_array(), $offset, $perpage);
        
    
        
        foreach ($clicks as $id)
        {
            $ids[] = $id['entry_id'];
        }
        
        $this->EE->db->where('site_id', $this->EE->config->item('site_id'));
        $total = $this->EE->db->count_all_results('channel_titles');
        
        

        $j_response['sEcho'] = $sEcho;
        $j_response['iTotalRecords'] = $total;
        $j_response['iTotalDisplayRecords'] = $click_query->num_rows();
                    
        $tdata = array();
        $i = 0;            
        
        $click_results = $this->EE->comment_model->fetch_comment_data($ids, $order);
    
    
        $j_response['aaData'] = $tdata;    
        $sOutput = $this->EE->javascript->generate_json($j_response, TRUE);
    
        die($sOutput);
    }