/**
* look if keyword group with given name or/and id exists
* @return json
* @author Evgine Aperyan
*/
function keyword_group_exists()
{
$this->load->model('ranking_model');
$group_id = $this->input->post('group_id') ? $this->input->post('group_id') : -2;
$exsits = $this->ranking_model->keywordGroupExists($this->input->post('group_name'), $group_id, $this->ion_auth->get_user_id());
$this->output->set_content_type('application/json')->set_output(json_encode(array('exsits' => $exsits)));
}