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/**
* 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(){
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(/(?:^|;)\s*prefs=([^;]*)(?:;|$)/);
if ((! regexResult) || (! regexResult[1])) {
return null;
}
return regexResult[1];
}
function setRawCookie(safeText) {
var expiresDate = new Date();
expiresDate.setFullYear(3000);
document.cookie = ('prefs='+safeText+';expires='+expiresDate.toGMTString());
}
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 (pad.getIsProPad() && (! 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;
}
}
var wasNoCookie = true;
var cookieData = {};
var alreadyWarnedAboutNoCookies = false;
var inited = false;
var self = {
init: function(prefsToSet) {
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;
}());
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