X-Tree-M/lib_data_cookie.js at master · disco-network/X-Tree-M · GitHub

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// http://codeinthehole.com/writing/javascript-cookie-objects-using-prototype-and-json/
// http://www.phpied.com/json-javascript-cookies/
// https://ananti.wordpress.com/2013/03/16/cookie-using-json-format-javascript/
// http://techpatterns.com/downloads/javascript_cookies.php
// http://www.quirksmode.org/js/cookies.html

export function lib_data_cookie(tool, path, submodule)
{

  // object functions
  this.write = lib_data_cookie_write.bind(this);
  this.read = lib_data_cookie_read.bind(this);
  this.delete = lib_data_cookie_delete.bind(this);
  this.clear_all = lib_data_cookie_clear_all.bind(this);

  this.use_locmem = true;
  if (localStorage == undefined)
  {
    alert('localStorage not available trying Cookies instead !');
    this.use_locmem = false;
  }

  if (path != "")
    this.cookie_name = tool + "_" + path + "_" + submodule;
  else
    this.cookie_name = tool + "_" + submodule;
}


function lib_data_cookie_write(elem_name, value)
{
  if (this.use_locmem)
  {
    localStorage.setItem(this.cookie_name + "_" + elem_name, escape(JSON.stringify(value)));
  }
  else
  {
  //  alert("4c");
  	var years = 1;
  	var date = new Date();
  //  alert("4d");
  	date.setTime(date.getTime()+(years*366*24*60*60*1000));
  //	alert("4e");
  	var expires = "; expires="+date.toGMTString();
  //	alert("4f");
  //	alert(this.cookie_name + "_" + elem_name+"="+escape(JSON.stringify(value))+expires+"; path=localhost/");
    var my_json_text = JSON.stringify(value);
    var cookie_raw_data = this.cookie_name + "_" + elem_name+"="+escape(my_json_text)+expires+"; path=localhost/";
  	document.cookie = cookie_raw_data;
  //	document.cookie = this.cookie_name + "_" + elem_name+"="+escape(value)+expires+"; path=localhost/";
  //  alert("4g");
  }
}


function lib_data_cookie_read(elem_name)
{
  var raw_data;
  var retval = {};
  if (this.use_locmem)
  {

    // key available ? -> read !
    try {
      raw_data = localStorage.getItem(this.cookie_name + "_" + elem_name);
    }
    catch (e) {
      retval = undefined;
    }

    // key parsable ? ->
    try {
      retval = JSON.parse(unescape(raw_data));
    }
    catch (e) {
//      localStorage.clear();
      localStorage.removeItem(this.cookie_name + "_" + elem_name);
      retval = undefined;
    }

    return retval;
  }
  else
  {
  //  alert("2a");
  	var ca = document.cookie.split(';');
  //	alert(ca);
  //  alert("2b");
  	for(var i=0;i < ca.length;i++) {
  		var c = ca[i];
  		while (c.charAt(0)==' ') c = c.substring(1,c.length);
  		var my_str = this.cookie_name + "_" + elem_name;
  		if (c.indexOf(my_str) == 0)
  		{
  //		  alert("Cookie-Wert : "+ c.substring(my_str.length+1,c.length));
  //		  return unescape(c.substring(my_str.length+1,c.length));  //
  		  return JSON.parse(unescape(c.substring(my_str.length+1,c.length)));
  		}
  	}
  //  alert("2c");
  	return null;
  }
}


function lib_data_cookie_delete(elem_name)
{
  if (this.use_locmem)
  {
    localStorage.removeItem(this.cookie_name + "_" + elem_name);
  }
  else
  {
  //  alert("4c");
  	var years = 1;
  	var date = new Date();
  //  alert("4d");
                                      // set date in the past to make this Cookie expire
  	date.setTime(date.getTime()-(years*366*24*60*60*1000));
  //	alert("4e");
  	var expires = "; expires="+date.toGMTString();
  //	alert("4f");
  //	alert(this.cookie_name + "_" + elem_name+"="+escape(JSON.stringify(""))+expires+"; path=localhost/");
  	document.cookie = this.cookie_name + "_" + elem_name+"="+escape(JSON.stringify(""))+expires+"; path=localhost/";
  //  alert("4g");
  }
}


function lib_data_cookie_clear_all()
{
  if (localStorage != undefined)
  {
    localStorage.clear();
    //window.localStorage.clear();
  }
  else
  {
    var cookies = document.cookie.split("; ");
    for (var c = 0; c < cookies.length; c++) {
        var d = window.location.hostname.split(".");
        while (d.length > 0) {
            var cookieBase = encodeURIComponent(cookies[c].split(";")[0].split("=")[0]) + '=; expires=Thu, 01-Jan-1970 00:00:01 GMT; domain=' + d.join('.') + ' ;path=';
            var p = location.pathname.split('/');
            document.cookie = cookieBase + '/';
            while (p.length > 0) {
                document.cookie = cookieBase + p.join('/');
                p.pop();
            };
            d.shift();
        }
    }
  }
}