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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.
*/
/*
* noprowatcher keeps track of when a pad has had no pro user
* in it for a certain period of time, after which all guests
* are booted.
*/
import("etherpad.pad.padutils");
import("etherpad.collab.collab_server");
import("etherpad.pad.padusers");
import("etherpad.pad.pad_security");
import("etherpad.pad.model");
import("cache_utils.syncedWithCache");
import("execution");
import("etherpad.sessions");
function onStartup() {
execution.initTaskThreadPool("noprowatcher", 1);
}
function getNumProUsers(pad) {
var n = 0;
collab_server.getConnectedUsers(pad).forEach(function(info) {
if (! padusers.isGuest(info.userId)) {
n++; // found a non-guest
}
});
return n;
}
var _EMPTY_TIME = 60000;
function checkPad(padOrPadId) {
if ((typeof padOrPadId) == "string") {
return model.accessPadGlobal(padOrPadId, function(pad) {
return checkPad(pad);
});
}
var pad = padOrPadId;
if (! padutils.isProPad(pad)) {
return; // public pad
}
if (pad.getGuestPolicy() == 'allow') {
return; // public access
}
if (sessions.isAnEtherpadAdmin()) {
return;
}
var globalPadId = pad.getId();
var numConnections = collab_server.getNumConnections(pad);
var numProUsers = getNumProUsers(pad);
syncedWithCache('noprowatcher.no_pros_since', function(noProsSince) {
if (! numConnections) {
// no connections, clear state and we're done
delete noProsSince[globalPadId];
}
else if (numProUsers) {
// pro users in pad, so we're not in a span of time with
// no pro users
delete noProsSince[globalPadId];
}
else {
// no pro users in pad
var since = noProsSince[globalPadId];
if (! since) {
// no entry in cache, that means last time we checked
// there were still pro users, but now there aren't
noProsSince[globalPadId] = +new Date;
execution.scheduleTask("noprowatcher", "noProWatcherCheckPad",
_EMPTY_TIME+1000, [globalPadId]);
}
else {
// already in a span of time with no pro users
if ((+new Date) - since > _EMPTY_TIME) {
// _EMPTY_TIME milliseconds since we first noticed no pro users
collab_server.bootAllUsersFromPad(pad, "unauth");
pad_security.revokeAllPadAccess(globalPadId);
}
}
}
});
}
function onUserJoin(pad, userInfo) {
checkPad(pad);
}
function onUserLeave(pad, userInfo) {
checkPad(pad);
}
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