fa2a6e9ee6
Create a lazily-defined local reference for pad on initialization in each pad module in order to avoid circular dependency. At some point in the future this dependency should instead be injected into each module on initialization.
135 lines
3.4 KiB
JavaScript
135 lines
3.4 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)
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{
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pad = require('/pad2').pad; // Sidestep circular dependency (should be injected).
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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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if (typeof exports !== 'undefined') {
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exports.padcookie = padcookie;
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}
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