VicDeo
11 years ago
commit
5bdad7be17
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/**
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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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* This file is part of WebODF.
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*
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* WebODF is free software: you can redistribute it and/or modify it
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* under the terms of the GNU Affero General Public License (GNU AGPL)
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* as published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* WebODF is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with WebODF. If not, see <http://www.gnu.org/licenses/>.
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* @licend
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*
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* @source: http://www.webodf.org/
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* @source: https://github.com/kogmbh/WebODF/
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*/
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/*global runtime, ops*/
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define("webodf/editor/server/pullbox/MemberModel", [], function () {
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"use strict";
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/**
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* @constructor
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* @implements ops.MemberModel
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*/
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return function PullBoxMemberModel(sessionId, server) {
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var cachedMemberData = {},
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memberDataSubscribers = {},
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isServerPullingActivated = false,
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isServerPullingOpen = true,
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serverPullingTimeoutId = null,
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isInstantPullingRequested = false,
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isPulling = false,
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/**@const*/pullingIntervall = 20000;
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/**
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* @param {!Object} memberData
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*/
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function cacheMemberDatum(memberData) {
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var subscribers,
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i;
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// notify all subscribers who are interested in this data
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subscribers = memberDataSubscribers[memberData.memberid];
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if (subscribers) {
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// cache
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cachedMemberData[memberData.memberid] = memberData;
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for (i = 0; i < subscribers.length; i += 1) {
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subscribers[i](memberData.memberid, memberData);
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}
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}
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}
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function pullMemberData() {
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var i,
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memberIds = Object.keys(memberDataSubscribers);
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if (!isServerPullingOpen || isPulling) {
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return;
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}
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// no more timeout or instant pull request in any case
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serverPullingTimeoutId = null;
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isInstantPullingRequested = false;
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// set lock
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isPulling = true;
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runtime.log("member-list request for : " + memberIds.join(","));
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server.call({
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command: 'query_memberdata_list',
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args: {
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es_id: sessionId,
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member_ids: memberIds
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}
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}, function(responseData) {
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var response = /**@type {{memberdata_list:Array.<{uid,member_id,display_name,avatar_url,color}>}}*/(runtime.fromJson(responseData)),
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memberDataList,
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newMemberData, oldMemberData;
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// unlock
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isPulling = false;
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// meanwhile closed/disactivated?
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if (!isServerPullingOpen || !isServerPullingActivated) {
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return;
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}
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runtime.log("member-list reply: " + responseData);
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if (response.hasOwnProperty("memberdata_list")) {
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// add/update with all delivered memberdata
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memberDataList = response.memberdata_list;
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for (i = 0; i < memberDataList.length; i+=1) {
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newMemberData = {
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memberid: memberDataList[i].member_id,
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fullname: memberDataList[i].display_name,
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imageurl: memberDataList[i].avatar_url,
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color: memberDataList[i].color
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};
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oldMemberData = cachedMemberData.hasOwnProperty(newMemberData.memberid) ? cachedMemberData[newMemberData.memberid] : null;
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if (!oldMemberData ||
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oldMemberData.fullname !== newMemberData.fullname ||
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oldMemberData.imageurl !== newMemberData.imageurl ||
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oldMemberData.color !== newMemberData.color) {
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cacheMemberDatum(newMemberData);
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}
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}
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} else {
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runtime.log("Meh, memberdata list broken: " + responseData);
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}
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// trigger the next pulling
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if (isInstantPullingRequested) {
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pullMemberData();
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} else {
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serverPullingTimeoutId = runtime.setTimeout(pullMemberData, pullingIntervall);
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}
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});
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}
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/**
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* Activates the pulling
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* @return {undefined}
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*/
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function pullNewMemberData() {
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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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}
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isInstantPullingRequested = true;
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isServerPullingActivated = true;
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pullMemberData();
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}
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/**
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* Deactivates the pulling if there are no more subscribers
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* @return {undefined}
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*/
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function deactivatePeriodicMemberDataPulling() {
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var key;
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if (!isServerPullingActivated) {
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return;
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}
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// check if there is no more subscription
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for(key in memberDataSubscribers) {
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if (memberDataSubscribers.hasOwnProperty(key)) {
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// still subscribers, cannot deactivate yet
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return;
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}
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}
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isServerPullingActivated = false;
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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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}
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}
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/**
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* callback is called as soon as the memberdata is available and after that
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* on every memberdata update.
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* a parameter `null` passed to the callback means that the member is finally
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* not known.
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*
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* @param {!string} memberId
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* @param {!function(!string, ?Object)} subscriber
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* @return {undefined}
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*/
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this.getMemberDetailsAndUpdates = function (memberId, subscriber) {
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var /**@type{Object}*/
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memberData = cachedMemberData[memberId],
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subscribers = memberDataSubscribers[memberId] || [],
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i;
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memberDataSubscribers[memberId] = subscribers;
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runtime.assert(subscriber !== undefined, "missing callback");
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// detect double subscription
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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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if (i < subscribers.length) {
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// already subscribed
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runtime.log("double subscription request for "+memberId+" in PullBoxMemberModel::getMemberDetailsAndUpdates");
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} else {
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// subscribe
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subscribers.push(subscriber);
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// query data from server, if not done yet
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if (subscribers.length === 1) {
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// TODO: only fetch data for memberId here
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pullNewMemberData();
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}
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}
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if (memberData) {
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// data available from cache
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subscriber(memberId, memberData);
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} else {
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// pass temporary data
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subscriber(memberId, {
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memberid: memberId,
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fullname: "Unknown",
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color: "black",
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imageurl: ""
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});
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}
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};
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/**
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* getMemberDetailsAndUpdates subscribes a callback for updates on member details.
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* this function undoes this subscription.
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*
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* @param {!string} memberId
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* @param {!function(!string, ?Object)} subscriber
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* @return {undefined}
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*/
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this.unsubscribeMemberDetailsUpdates = function (memberId, subscriber) {
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var i,
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subscribers = memberDataSubscribers[memberId];
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runtime.assert(subscriber!==undefined, "missing subscriber parameter or null");
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runtime.assert(subscribers,
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"tried to unsubscribe when no one is subscribed ('" + memberId + "')");
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if (subscribers) {
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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 for memberId '" + memberId + "'");
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subscribers.splice(i,1);
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// clean up
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if (subscribers.length === 0) {
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runtime.log("no more subscribers for: "+memberId);
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delete memberDataSubscribers[memberId];
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delete cachedMemberData[memberId];
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deactivatePeriodicMemberDataPulling();
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}
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}
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};
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/**
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* Requests a gracefull shutdown of the Member Model
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* No more network activity is necessary.
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*/
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this.close = function (cb) {
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isServerPullingOpen = false;
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cb();
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};
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runtime.assert(server.networkStatus() === "ready", "network not ready");
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};
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});
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