<?php
defined('BASEPATH') OR exit('No direct script access allowed');

// 검색 파라미터
class Querystring
{

    private $CI;

    public function __construct()
    {
        $this->CI =& get_instance();
    }


    // 전체 주소
    public function output()
    {
        return $this->CI->input->server('QUERY_STRING', null, '');
    }


    // 쿼리스트링 수정
    public function replace($key = '', $val = '', $query_string = '')
    {
        if ( ! $key) {
            return false;
        }

        $query_string = $query_string ? $query_string : $this->CI->input->server('QUERY_STRING', null, '');
        parse_str($query_string, $qr);

        // remove from query string
        if ($key) {
            if ($val) {
                $qr[$key] = $val;
            } else {
                unset($qr[$key]);
            }
        }
        // return result
        $return = '';
        if (count($qr) > 0) {
            $return = http_build_query($qr);
        }

        return $return;
    }


    // 필드 정렬
    public function sort($findex, $forder = 'desc')
    {
        if ($this->CI->input->get('findex') === $findex) {
            $param_qstr = $this->replace('forder', (strtolower($this->CI->input->get('forder')) === 'asc') ? 'desc' : 'asc');
        } else {
            $param_qstr = $this->replace('forder', '', $this->replace('findex', '')) . '&amp;findex=' . $findex . '&amp;forder=' . $forder;
        }

        return '?' . $param_qstr;
    }
}