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