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181 lines
6.3 KiB
JavaScript
181 lines
6.3 KiB
JavaScript
/**
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* @license
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* Copyright (C) 2013 KO GmbH <copyright@kogmbh.com>
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*
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* @licstart
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* The JavaScript code in this page is free software: you can redistribute it
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* and/or modify it under the terms of the GNU Affero General Public License
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* (GNU AGPL) as published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version. The code is distributed
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU AGPL for more details.
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*
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* As additional permission under GNU AGPL version 3 section 7, you
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* may distribute non-source (e.g., minimized or compacted) forms of
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* that code without the copy of the GNU GPL normally required by
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* section 4, provided you include this license notice and a URL
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* through which recipients can access the Corresponding Source.
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*
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* As a special exception to the AGPL, any HTML file which merely makes function
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* calls to this code, and for that purpose includes it by reference shall be
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* deemed a separate work for copyright law purposes. In addition, the copyright
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* holders of this code give you permission to combine this code with free
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* software libraries that are released under the GNU LGPL. You may copy and
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* distribute such a system following the terms of the GNU AGPL for this code
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* and the LGPL for the libraries. If you modify this code, you may extend this
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* exception to your version of the code, but you are not obligated to do so.
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* If you do not wish to do so, delete this exception statement from your
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* version.
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*
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* This license applies to this entire compilation.
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* @licend
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* @source: http://www.webodf.org/
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* @source: http://gitorious.org/webodf/webodf/
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*/
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/*global define, ops, runtime */
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define("webodf/editor/server/pullbox/SessionList", [], function () {
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"use strict";
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return function PullBoxSessionList(server) {
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var cachedSessionData = {},
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subscribers = [],
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serverPullingTimeoutId = null,
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pullingActive = true;
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function onSessionData(sessionData) {
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var i,
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isNew = ! cachedSessionData.hasOwnProperty(sessionData.id);
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// cache
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cachedSessionData[sessionData.id] = sessionData;
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runtime.log("get session data for:"+sessionData.title+", is new:"+isNew);
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for (i = 0; i < subscribers.length; i += 1) {
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if (isNew) {
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subscribers[i].onCreated(sessionData);
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} else {
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subscribers[i].onUpdated(sessionData);
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}
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}
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}
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function onSessionRemoved(sessionId) {
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var i;
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if (cachedSessionData.hasOwnProperty(sessionId)) {
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delete cachedSessionData[sessionId];
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for (i = 0; i < subscribers.length; i += 1) {
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subscribers[i].onRemoved(sessionId);
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}
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}
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}
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function pullSessionList() {
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serverPullingTimeoutId = null;
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server.call({
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command: "query_sessiondata_list"
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}, function(responseData) {
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var response = runtime.fromJson(responseData),
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sessionList, i,
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unupdatedSessions = {};
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// stopped meanwhile? TODO: support for cancelling calls
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if (!pullingActive) {
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return;
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}
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runtime.log("query_sessiondata_list reply: " + responseData);
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if (response.hasOwnProperty("sessiondata_list")) {
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// collect known sessions
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for (i in cachedSessionData) {
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if (cachedSessionData.hasOwnProperty(i)) {
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unupdatedSessions[i] = ""; // some dummy value, unused
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}
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}
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// add/update with all delivered sessions
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sessionList = response.sessiondata_list;
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for (i = 0; i < sessionList.length; i++) {
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if (unupdatedSessions.hasOwnProperty(sessionList[i].id)) {
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delete unupdatedSessions[sessionList[i].id];
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}
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onSessionData(sessionList[i]);
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}
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// remove unupdated sessions
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for (i in unupdatedSessions) {
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if (unupdatedSessions.hasOwnProperty(i)) {
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onSessionRemoved(i);
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}
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}
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// next update in 5 secs
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serverPullingTimeoutId = runtime.getWindow().setTimeout(pullSessionList, 5000);
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} else {
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runtime.log("Meh, sessionlist data broken: " + responseData);
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}
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});
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}
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this.getSessions = function (subscriber) {
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var i,
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sessionList = [];
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if (subscriber) {
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subscribers.push(subscriber);
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}
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for (i in cachedSessionData) {
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if (cachedSessionData.hasOwnProperty(i)) {
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sessionList.push(cachedSessionData[i]);
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}
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}
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return sessionList;
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};
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this.unsubscribe = function (subscriber) {
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var i;
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for (i=0; i<subscribers.length; i+=1) {
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if (subscribers[i] === subscriber) {
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break;
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}
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}
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runtime.assert((i < subscribers.length),
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"tried to unsubscribe when not subscribed.");
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subscribers.splice(i,1);
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};
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this.setUpdatesEnabled = function (enabled) {
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if (pullingActive === enabled) {
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return;
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}
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pullingActive = enabled;
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if (pullingActive) {
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pullSessionList();
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} else {
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// cancel any running pulling timeout
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if (serverPullingTimeoutId !== null) {
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runtime.clearTimeout(serverPullingTimeoutId);
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serverPullingTimeoutId = null;
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}
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}
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};
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function init() {
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pullSessionList();
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}
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init();
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};
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});
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