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cryptpad/www/common/common-messenger.js

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JavaScript

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define([
'/bower_components/chainpad-crypto/crypto.js',
'/common/curve.js',
'/common/common-hash.js',
'/common/common-util.js',
'/common/common-realtime.js',
'/common/common-constants.js',
'/bower_components/nthen/index.js',
], function (Crypto, Curve, Hash, Util, Realtime, Constants, nThen) {
'use strict';
var Msg = {
inputs: [],
};
var Types = {
message: 'MSG',
update: 'UPDATE',
unfriend: 'UNFRIEND',
mapId: 'MAP_ID',
mapIdAck: 'MAP_ID_ACK'
};
var clone = function (o) {
return JSON.parse(JSON.stringify(o));
};
// TODO
// - mute a channel (hide notifications or don't open it?)
var createData = Msg.createData = function (proxy, hash) {
return {
channel: hash || Hash.createChannelId(),
displayName: proxy[Constants.displayNameKey],
profile: proxy.profile && proxy.profile.view,
edPublic: proxy.edPublic,
curvePublic: proxy.curvePublic,
avatar: proxy.profile && proxy.profile.avatar
};
};
var getFriend = function (proxy, pubkey) {
if (pubkey === proxy.curvePublic) {
var data = createData(proxy);
delete data.channel;
return data;
}
return proxy.friends ? proxy.friends[pubkey] : undefined;
};
var getFriendList = Msg.getFriendList = function (proxy) {
if (!proxy.friends) { proxy.friends = {}; }
return proxy.friends;
};
var msgAlreadyKnown = function (channel, sig) {
return channel.messages.some(function (message) {
return message[0] === sig;
});
};
Msg.messenger = function (store) {
var messenger = {
handlers: {
message: [],
join: [],
leave: [],
update: [],
friend: [],
unfriend: [],
ready: []
},
range_requests: {},
};
var eachHandler = function (type, g) {
messenger.handlers[type].forEach(g);
};
messenger.on = function (type, f) {
var stack = messenger.handlers[type];
if (!Array.isArray(stack)) {
return void console.error('unsupported message type');
}
if (typeof(f) !== 'function') {
return void console.error('expected function');
}
stack.push(f);
};
var channels = messenger.channels = {};
var joining = {};
// declare common variables
var network = store.network;
var proxy = store.proxy;
var realtime = store.realtime;
Msg.hk = network.historyKeeper;
var friends = getFriendList(proxy);
var getChannel = function (chanId) {
return channels[chanId];
};
var getFriendFromChannel = function (id) {
var friend;
for (var k in friends) {
if (friends[k].channel === id) {
friend = friends[k];
break;
}
}
return friend;
};
var initRangeRequest = function (txid, chanId, sig, cb) {
messenger.range_requests[txid] = {
messages: [],
cb: cb,
chanId: chanId,
sig: sig,
};
};
var getRangeRequest = function (txid) {
return messenger.range_requests[txid];
};
var deleteRangeRequest = function (txid) {
delete messenger.range_requests[txid];
};
messenger.getMoreHistory = function (chanId, hash, count, cb) {
if (typeof(cb) !== 'function') { return; }
if (typeof(hash) !== 'string') {
// Channel is empty!
return void cb(void 0, []);
}
var chan = getChannel(chanId);
if (typeof(chan) === 'undefined') {
console.error("chan is undefined. we're going to have a problem here");
return;
}
var txid = Util.uid();
initRangeRequest(txid, chanId, hash, cb);
var msg = [ 'GET_HISTORY_RANGE', chan.id, {
from: hash,
count: count,
txid: txid,
}
];
network.sendto(network.historyKeeper, JSON.stringify(msg)).then(function () {
}, function (err) {
throw new Error(err);
});
};
/*var getCurveForChannel = function (id) {
var channel = channels[id];
if (!channel) { return; }
return channel.curve;
};*/
/*messenger.getChannelHead = function (id, cb) {
var channel = getChannel(id);
if (channel.isFriendChat) {
var friend;
for (var k in friends) {
if (friends[k].channel === id) {
friend = friends[k];
break;
}
}
if (!friend) { return void cb('NO_SUCH_FRIEND'); }
cb(void 0, friend.lastKnownHash);
} else {
// TODO room
cb('NOT_IMPLEMENTED');
}
};*/
messenger.setChannelHead = function (id, hash, cb) {
var channel = getChannel(id);
if (channel.isFriendChat) {
var friend = getFriendFromChannel(id);
if (!friend) { return void cb('NO_SUCH_FRIEND'); }
friend.lastKnownHash = hash;
} else {
// TODO room
return void cb('NOT_IMPLEMENTED');
}
cb();
};
// Make sure the data we have about our friends are up-to-date when we see them online
var checkFriendData = function (curve, data) {
if (curve === proxy.curvePublic) { return; }
var friend = getFriend(proxy, curve);
var types = [];
Object.keys(data).forEach(function (k) {
if (friend[k] !== data[k]) {
types.push(k);
friend[k] = data[k];
}
});
eachHandler('update', function (f) {
f(clone(data), types);
});
};
// Id message allows us to map a netfluxId with a public curve key
var onIdMessage = function (msg, sender) {
var channel;
var isId = Object.keys(channels).some(function (chanId) {
if (channels[chanId].userList.indexOf(sender) !== -1) {
channel = channels[chanId];
return true;
}
});
if (!isId) { return; }
var decryptedMsg = channel.encryptor.decrypt(msg);
if (decryptedMsg === null) {
return void console.error("Failed to decrypt message");
}
if (!decryptedMsg) {
console.error('decrypted message was falsey but not null');
return;
}
var parsed;
try {
parsed = JSON.parse(decryptedMsg);
} catch (e) {
console.error(decryptedMsg);
return;
}
if (parsed[0] !== Types.mapId && parsed[0] !== Types.mapIdAck) { return; }
// check that the responding peer's encrypted netflux id matches
// the sender field. This is to prevent replay attacks.
if (parsed[2] !== sender || !parsed[1]) { return; }
channel.mapId[sender] = parsed[1];
checkFriendData(parsed[1].curvePublic, parsed[1]);
eachHandler('join', function (f) {
f(parsed[1], channel.id);
});
if (parsed[0] !== Types.mapId) { return; } // Don't send your key if it's already an ACK
// Answer with your own key
var myData = createData(proxy);
delete myData.channel;
var rMsg = [Types.mapIdAck, myData, channel.wc.myID];
var rMsgStr = JSON.stringify(rMsg);
var cryptMsg = channel.encryptor.encrypt(rMsgStr);
network.sendto(sender, cryptMsg);
};
var orderMessages = function (channel, new_messages /*, sig */) {
var messages = channel.messages;
// TODO improve performance, guarantee correct ordering
new_messages.reverse().forEach(function (msg) {
messages.unshift(msg);
});
};
var removeFromFriendList = function (curvePublic, cb) {
if (!proxy.friends) { return; }
var friends = proxy.friends;
delete friends[curvePublic];
Realtime.whenRealtimeSyncs(realtime, cb);
};
var pushMsg = function (channel, cryptMsg) {
var msg = channel.encryptor.decrypt(cryptMsg);
var sig = cryptMsg.slice(0, 64);
if (msgAlreadyKnown(channel, sig)) { return; }
var parsedMsg = JSON.parse(msg);
var curvePublic;
if (parsedMsg[0] === Types.message) {
// TODO validate messages here
var res = {
type: parsedMsg[0],
sig: sig,
author: parsedMsg[1],
time: parsedMsg[2],
text: parsedMsg[3],
channel: channel.id
// this makes debugging a whole lot easier
//curve: getCurveForChannel(channel.id),
};
channel.messages.push(res);
eachHandler('message', function (f) {
f(res);
});
return true;
}
if (parsedMsg[0] === Types.update) {
checkFriendData(parsedMsg[1], parsedMsg[3]);
return;
}
if (parsedMsg[0] === Types.unfriend) {
curvePublic = parsedMsg[1];
// If this a removal from our part by in another tab, do nothing.
// The channel is already closed in the proxy.on('remove') part
if (curvePublic === proxy.curvePublic) { return; }
removeFromFriendList(curvePublic, function () {
channel.wc.leave(Types.unfriend);
delete channels[channel.id];
eachHandler('unfriend', function (f) {
f(curvePublic, false);
});
});
return;
}
};
/* Broadcast a display name, profile, or avatar change to all contacts
*/
// TODO send event...
messenger.updateMyData = function () {
var friends = getFriendList(proxy);
var mySyncData = friends.me;
var myData = createData(proxy);
if (!mySyncData || mySyncData.displayName !== myData.displayName
|| mySyncData.profile !== myData.profile
|| mySyncData.avatar !== myData.avatar) {
delete myData.channel;
Object.keys(channels).forEach(function (chan) {
var channel = channels[chan];
if (!channel) {
return void console.error('NO_SUCH_CHANNEL');
}
var msg = [Types.update, myData.curvePublic, +new Date(), myData];
var msgStr = JSON.stringify(msg);
var cryptMsg = channel.encryptor.encrypt(msgStr);
channel.wc.bcast(cryptMsg).then(function () {
// TODO send event
//channel.refresh();
}, function (err) {
console.error(err);
});
});
eachHandler('update', function (f) {
f(myData, ['displayName', 'profile', 'avatar']);
});
friends.me = myData;
}
};
var onChannelReady = function (chanId) {
var cb = joining[chanId];
if (typeof(cb) !== 'function') {
return void console.error('channel ready without callback');
}
delete joining[chanId];
return cb();
};
var onDirectMessage = function (msg, sender) {
if (sender !== Msg.hk) { return void onIdMessage(msg, sender); }
var parsed = JSON.parse(msg);
if (/HISTORY_RANGE/.test(parsed[0])) {
//console.log(parsed);
var txid = parsed[1];
var req = getRangeRequest(txid);
var type = parsed[0];
if (!req) {
return void console.error("received response to unknown request");
}
if (type === 'HISTORY_RANGE') {
req.messages.push(parsed[2]);
} else if (type === 'HISTORY_RANGE_END') {
// process all the messages (decrypt)
var channel = getChannel(req.chanId);
var decrypted = req.messages.map(function (msg) {
if (msg[2] !== 'MSG') { return; }
try {
return {
d: JSON.parse(channel.encryptor.decrypt(msg[4])),
sig: msg[4].slice(0, 64),
};
} catch (e) {
console.log('failed to decrypt');
return null;
}
}).filter(function (decrypted) {
return decrypted;
}).map(function (O) {
return {
type: O.d[0],
sig: O.sig,
author: O.d[1],
time: O.d[2],
text: O.d[3],
channel: req.chanId
};
});
orderMessages(channel, decrypted, req.sig);
req.cb(void 0, decrypted);
return deleteRangeRequest(txid);
} else {
console.log(parsed);
}
return;
}
if ((parsed.validateKey || parsed.owners) && parsed.channel) {
return;
}
// End of initial history
if (parsed.state && parsed.state === 1 && parsed.channel) {
if (channels[parsed.channel]) {
// parsed.channel is Ready
// channel[parsed.channel].ready();
channels[parsed.channel].ready = true;
onChannelReady(parsed.channel);
var updateTypes = channels[parsed.channel].updateOnReady;
if (updateTypes) {
//channels[parsed.channel].updateUI(updateTypes);
}
}
return;
}
// Initial history message
var chan = parsed[3];
if (!chan || !channels[chan]) { return; }
pushMsg(channels[chan], parsed[4]);
};
var onMessage = function (msg, sender, chan) {
if (!channels[chan.id]) { return; }
var isMessage = pushMsg(channels[chan.id], msg);
if (isMessage) {
if (channels[chan.id].wc.myID !== sender) {
// Don't notify for your own messages
//channels[chan.id].notify();
}
//channels[chan.id].refresh();
// TODO emit message event
}
};
// listen for messages...
network.on('message', function(msg, sender) {
onDirectMessage(msg, sender);
});
messenger.removeFriend = function (curvePublic, cb) {
if (typeof(cb) !== 'function') { throw new Error('NO_CALLBACK'); }
var data = getFriend(proxy, curvePublic);
if (!data) {
// friend is not valid
console.error('friend is not valid');
return void cb('INVALID_FRIEND');
}
var channel = channels[data.channel];
if (!channel) {
return void cb("NO_SUCH_CHANNEL");
}
if (!network.webChannels.some(function (wc) {
return wc.id === channel.id;
})) {
console.error('bad channel: ', curvePublic);
}
var msg = [Types.unfriend, proxy.curvePublic, +new Date()];
var msgStr = JSON.stringify(msg);
var cryptMsg = channel.encryptor.encrypt(msgStr);
try {
channel.wc.bcast(cryptMsg).then(function () {
removeFromFriendList(curvePublic, function () {
delete channels[channel.id];
eachHandler('unfriend', function (f) {
f(curvePublic, true);
});
cb();
});
}, function (err) {
console.error(err);
cb(err);
});
} catch (e) {
cb(e);
}
};
var getChannelMessagesSince = function (chan, data, keys) {
console.log('Fetching [%s] messages since [%s]', chan.id, data.lastKnownHash || '');
var cfg = {
validateKey: keys.validateKey,
owners: [proxy.edPublic, data.edPublic],
lastKnownHash: data.lastKnownHash
};
var msg = ['GET_HISTORY', chan.id, cfg];
network.sendto(network.historyKeeper, JSON.stringify(msg))
.then(function () {}, function (err) {
throw new Error(err);
});
};
var openChannel = function (data) {
var keys = data.keys;
var encryptor = Curve.createEncryptor(keys);
network.join(data.channel).then(function (chan) {
var channel = channels[data.channel] = {
id: data.channel,
isFriendChat: data.isFriendChat,
sending: false,
encryptor: encryptor,
messages: [],
wc: chan,
userList: [],
mapId: {},
};
chan.on('message', function (msg, sender) {
onMessage(msg, sender, chan);
});
var onJoining = function (peer) {
if (peer === Msg.hk) { return; }
if (channel.userList.indexOf(peer) !== -1) { return; }
channel.userList.push(peer);
// Join event will be sent once we are able to ID this peer
var myData = createData(proxy);
delete myData.channel;
var msg = [Types.mapId, myData, chan.myID];
var msgStr = JSON.stringify(msg);
var cryptMsg = channel.encryptor.encrypt(msgStr);
network.sendto(peer, cryptMsg);
};
chan.members.forEach(function (peer) {
if (peer === Msg.hk) { return; }
if (channel.userList.indexOf(peer) !== -1) { return; }
channel.userList.push(peer);
});
chan.on('join', onJoining);
chan.on('leave', function (peer) {
var i = channel.userList.indexOf(peer);
while (i !== -1) {
channel.userList.splice(i, 1);
i = channel.userList.indexOf(peer);
}
// update status
var otherData = channel.mapId[peer];
if (!otherData) { return; }
// Make sure the leaving user is not connected with another netflux id
if (channel.userList.some(function (nId) {
return channel.mapId[nId]
&& channel.mapId[nId].curvePublic === otherData.curvePublic;
})) { return; }
// Send the notification
eachHandler('leave', function (f) {
f(otherData, channel.id);
});
});
// FIXME don't subscribe to the channel implicitly
getChannelMessagesSince(chan, data, keys);
}, function (err) {
console.error(err);
});
};
messenger.getFriendList = function (cb) {
var friends = proxy.friends;
if (!friends) { return void cb(void 0, []); }
cb(void 0, Object.keys(proxy.friends).filter(function (k) {
return k !== 'me';
}));
};
/*messenger.openFriendChannel = function (curvePublic, cb) {
if (typeof(curvePublic) !== 'string') { return void cb('INVALID_ID'); }
if (typeof(cb) !== 'function') { throw new Error('expected callback'); }
var friend = clone(friends[curvePublic]);
if (typeof(friend) !== 'object') {
return void cb('NO_FRIEND_DATA');
}
var channel = friend.channel;
if (!channel) { return void cb('E_NO_CHANNEL'); }
joining[channel] = cb;
openFriendChannel(friend, curvePublic);
};*/
messenger.sendMessage = function (id, payload, cb) {
var channel = getChannel(id);
if (!channel) { return void cb('NO_CHANNEL'); }
if (!network.webChannels.some(function (wc) {
if (wc.id === channel.wc.id) { return true; }
})) {
return void cb('NO_SUCH_CHANNEL');
}
var msg = [Types.message, proxy.curvePublic, +new Date(), payload];
if (!channel.isFriendChat) {
msg.push(proxy[Constants.displayNameKey]);
}
var msgStr = JSON.stringify(msg);
var cryptMsg = channel.encryptor.encrypt(msgStr);
channel.wc.bcast(cryptMsg).then(function () {
pushMsg(channel, cryptMsg);
cb();
}, function (err) {
cb(err);
});
};
messenger.getStatus = function (chanId, cb) {
// Display green status if one member is not me
var channel = getChannel(chanId);
if (!channel) { return void cb('NO_SUCH_CHANNEL'); }
var online = channel.userList.some(function (nId) {
var data = channel.mapId[nId] || undefined;
if (!data) { return false; }
return data.curvePublic !== proxy.curvePublic;
});
cb(void 0, online);
};
messenger.getFriendInfo = function (channel, cb) {
setTimeout(function () {
var friend;
for (var k in friends) {
if (friends[k].channel === channel) {
friend = friends[k];
break;
}
}
if (!friend) { return void cb('NO_SUCH_FRIEND'); }
// this clone will be redundant when ui uses postmessage
cb(void 0, clone(friend));
});
};
messenger.getMyInfo = function (cb) {
cb(void 0, {
curvePublic: proxy.curvePublic,
displayName: proxy[Constants.displayNameKey]
});
};
var loadFriend = function (friend, cb) {
var channel = friend.channel;
if (getChannel(channel)) { return void cb(); }
joining[channel] = cb;
var keys = Curve.deriveKeys(friend.curvePublic, proxy.curvePrivate);
var data = {
keys: keys,
channel: friend.channel,
lastKnownHash: friend.lastKnownHash,
owners: [proxy.edPublic, friend.edPublic],
isFriendChat: true
};
openChannel(data);
};
// Detect friends changes made in another worker
proxy.on('change', ['friends'], function (o, n, p) {
var curvePublic;
if (o === undefined) {
// new friend added
curvePublic = p.slice(-1)[0];
// Load channel
var friend = friends[curvePublic];
if (typeof(friend) !== 'object') { return; }
var channel = friend.channel;
if (!channel) { return; }
loadFriend(friend, function () {
eachHandler('friend', function (f) {
f(curvePublic);
});
});
return;
}
if (typeof(n) === 'undefined') {
// Handled by .on('remove')
return;
}
console.error(o, n, p);
}).on('remove', ['friends'], function (o, p) {
var curvePublic = p[1];
if (!curvePublic) { return; }
if (p[2] !== 'channel') { return; }
var channel = channels[o];
channel.wc.leave(Types.unfriend);
delete channels[channel.id];
eachHandler('unfriend', function (f) {
f(curvePublic, true);
});
});
// Friend added in our contacts in the current worker
messenger.onFriendAdded = function (friendData) {
var friend = friends[friendData.curvePublic];
if (typeof(friend) !== 'object') { return; }
var channel = friend.channel;
if (!channel) { return; }
loadFriend(friend, function () {
eachHandler('friend', function (f) {
f(friend.curvePublic);
});
});
};
var ready = false;
var init = function () {
var friends = getFriendList(proxy);
nThen(function (waitFor) {
Object.keys(friends).forEach(function (key) {
if (key === 'me') { return; }
var friend = clone(friends[key]);
if (typeof(friend) !== 'object') { return; }
var channel = friend.channel;
if (!channel) { return; }
loadFriend(friend, waitFor());
});
// TODO load rooms
}).nThen(function () {
// TODO send event chat ready
// Remove spinner in chatbox
ready = true;
eachHandler('ready', function (f) {
f();
});
});
};
init();
var getRooms = function (curvePublic, cb) {
if (curvePublic) {
// We need to get data about a new friend's room
var friend = getFriend(proxy, curvePublic);
if (!friend) { return void cb({error: 'NO_SUCH_FRIEND'}); }
var channel = getChannel(friend.channel);
if (!channel) { return void cb({error: 'NO_SUCH_CHANNEL'}); }
return void cb([{
id: channel.id,
isFriendChat: true,
name: friend.displayName,
lastKnownHash: friend.lastKnownHash,
curvePublic: friend.curvePublic
}]);
}
var rooms = Object.keys(channels).map(function (id) {
var r = getChannel(id);
var name, lastKnownHash, curvePublic;
if (r.isFriendChat) {
var friend = getFriendFromChannel(id);
if (!friend) { return null; }
name = friend.displayName;
lastKnownHash = friend.lastKnownHash;
curvePublic = friend.curvePublic;
} else {
// TODO room get metadata (name) && lastKnownHash
}
return {
id: r.id,
isFriendChat: r.isFriendChat,
name: name,
lastKnownHash: lastKnownHash,
curvePublic: curvePublic
};
}).filter(function (x) { return x; });
cb(rooms);
};
var getUserList = function (data, cb) {
var room = getChannel(data.id);
if (!room) { return void cb({error: 'NO_SUCH_CHANNEL'}); }
if (room.isFriendChat) {
var friend = getFriendFromChannel(data.id);
if (!friend) { return void cb({error: 'NO_SUCH_FRIEND'}); }
cb([friend]);
} else {
// TODO room userlist in rooms...
// (this is the static userlist, not the netflux one)
}
};
messenger.execCommand = function (obj, cb) {
var cmd = obj.cmd;
var data = obj.data;
if (cmd === 'IS_READY') {
return void cb(ready);
}
if (cmd === 'GET_ROOMS') {
return void getRooms(data, cb);
}
if (cmd === 'GET_USERLIST') {
return void getUserList(data, cb);
}
};
Object.freeze(messenger);
return messenger;
};
return Msg;
});