/*
  Sortt

  @License MIT
  @Author 6543
*/

//safe url sort param global

//creat global function with main routine
window.sortt=function(normsort,revsort,isdefault){
  //sortTable [normsort] (revsort) (isdefault)

  //normsort is needet
  if (typeof normsort  === 'undefined') return false;

  //default values of optinal parameters
  if (typeof revsort  === 'undefined') revsort = "";
  if (typeof isdefault  === 'undefined') isdefault = false;
  if (!(typeof isdefault  === 'boolean')) isdefault = false;

  // parse URL
  /*  script check if url has already a sort=
        NO: if sort=“” indikates default (with * prefix) set url_sort=
        YES: set url_sort variable
  */
  url_sort="";
  if (window.location.search.indexOf("sort=") < 0) {
    if ( isdefault ) url_sort = normsort;
  } else {
    url_sort=window.location.search.substr(window.location.search.indexOf("sort=")+5);
    url_sort=url_sort.substr(0,url_sort.indexOf("&"));
  }

  // generate new URL
  /*  script check if url_sort and sort attribute is same
        YES: check if reverse attribute exist -> YES: generate URL with reverse sort param and open
        NO: generate URL with sort param and open
  */
  url_new = window.location.protocol + "//" + window.location.host + window.location.pathname;
  if (window.location.search.length == 0) {
    if (url_sort != normsort) {
      url_new += "?sort=" + normsort
    } else if (revsort != "") {
      url_new += "?sort=" + revsort
    }
  } else {
    tmp = window.location.search.substr(window.location.search.indexOf("sort=")+5);
    if (tmp.indexOf("&") >= 0) {
      tmp = tmp.substr(tmp.indexOf("&"));
    } else {
      tmp = "";
    }

    if (url_sort != normsort) {
      url_new = tmp.substr(0,window.location.search.indexOf("sort=")+5) + normsort + tmp;
    } else if (revsort != "") {
      url_new = tmp.substr(0,window.location.search.indexOf("sort=")+5) + revsort + tmp;
    }
  }

  window.location.replace(url_new);
};