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/**
* This code is mostly from the old Etherpad. Please help us to comment this code.
* This helps other people to understand this code better and helps them to improve it.
* TL;DR COMMENTS ON THIS FILE ARE HIGHLY APPRECIATED
*/
/**
* Copyright 2009 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS-IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var padcookie = (function()
{
var cookieName = isHttpsScheme() ? "prefs" : "prefsHttp";
function getRawCookie()
{
// returns null if can't get cookie text
if (!document.cookie)
{
return null;
}
// look for (start of string OR semicolon) followed by whitespace followed by prefs=(something);
var regexResult = document.cookie.match(new RegExp("(?:^|;)\\s*" + cookieName + "=([^;]*)(?:;|$)"));
if ((!regexResult) || (!regexResult[1]))
{
return null;
}
return regexResult[1];
}
function setRawCookie(safeText)
{
var expiresDate = new Date();
expiresDate.setFullYear(3000);
var secure = isHttpsScheme() ? ";secure" : "";
document.cookie = (cookieName + "=" + safeText + ";expires=" + expiresDate.toGMTString() + secure);
}
function parseCookie(text)
{
// returns null if can't parse cookie.
try
{
var cookieData = JSON.parse(unescape(text));
return cookieData;
}
catch (e)
{
return null;
}
}
function stringifyCookie(data)
{
return escape(JSON.stringify(data));
}
function saveCookie()
{
if (!inited)
{
return;
}
setRawCookie(stringifyCookie(cookieData));
if ((!getRawCookie()) && (!alreadyWarnedAboutNoCookies))
{
alert("Warning: it appears that your browser does not have cookies enabled." + " EtherPad uses cookies to keep track of unique users for the purpose" + " of putting a quota on the number of active users. Using EtherPad without " + " cookies may fill up your server's user quota faster than expected.");
alreadyWarnedAboutNoCookies = true;
}
}
function isHttpsScheme() {
return window.location.protocol == "https:";
}
var wasNoCookie = true;
var cookieData = {};
var alreadyWarnedAboutNoCookies = false;
var inited = false;
var pad = undefined;
var self = {
init: function(prefsToSet, _pad)
{
pad = _pad;
var rawCookie = getRawCookie();
if (rawCookie)
{
var cookieObj = parseCookie(rawCookie);
if (cookieObj)
{
wasNoCookie = false; // there was a cookie
delete cookieObj.userId;
delete cookieObj.name;
delete cookieObj.colorId;
cookieData = cookieObj;
}
}
for (var k in prefsToSet)
{
cookieData[k] = prefsToSet[k];
}
inited = true;
saveCookie();
},
wasNoCookie: function()
{
return wasNoCookie;
},
getPref: function(prefName)
{
return cookieData[prefName];
},
setPref: function(prefName, value)
{
cookieData[prefName] = value;
saveCookie();
}
};
return self;
}());
exports.padcookie = padcookie;
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