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WIP roster implementation

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pull/1/head
ansuz 6 years ago
parent c418f77e48
commit be8b014b36
1 changed files with 427 additions and 37 deletions
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464
www/common/outer/roster.js
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@ -1,31 +1,311 @@
(function () {
var factory = function (Util, Hash, CPNetflux) {
var factory = function (Util, Hash, CPNetflux, Sortify, nThen, Crypto) {
var Roster = {};
Roster.commands = {};
/*
roster: {
state: {
user0CurveKey: {
role: "OWNER|ADMIN|MEMBER",
profile: "",
mailbox: "",
name: "",
title: ""
},
user1CurveKey: {
...
}
},
metadata: {
}
}
*/
var canCheckpoint = function (author, state) {
// if you're here then you've received a checkpoint message
// that you don't necessarily trust.
// find the author's role from your knoweldge of the state
var role = Util.find(state, ['author', 'role']);
// and check if it is 'OWNER' or 'ADMIN'
return ['OWNER', 'ADMIN'].indexOf(role) !== -1;
};
var isValidRole = function (role) {
return ['OWNER', 'ADMIN', 'MEMBER'].indexOf(role) !== -1;
};
var canAddRole = function (author, role, state) {
var authorRole = Util.find(state, [author, 'role']);
if (!authorRole) { return false; }
// nobody can add an invalid role
if (!isValidRole(role)) { return false; }
// owners can add any valid role they want
if (authorRole === 'OWNER') { return true; }
// admins can add other admins or members
if (authorRole === "ADMIN") { return ['ADMIN', 'MEMBER'].indexOf(role) !== -1; }
// (MEMBER, other) can't add anyone of any role
return false;
};
var isValidId = function (id) {
return typeof(id) === 'string' && id.length === 44;
};
var canDescribeTarget = function (author, curve, state) {
// you must be in the group to describe anyone
if (!state[curve]) { return false; }
// anyone can describe themself
if (author === curve && state[curve]) { return true; }
var authorRole = Util.find(state, [author, 'role']);
var targetRole = Util.find(state, [curve, 'role']);
// something is really wrong if there's no authorRole
if (!authorRole) { return false; }
// owners can do whatever they want
if (authorRole === 'OWNER') { return true; }
// admins can describe anyone escept owners
if (authorRole === 'ADMIN' && targetRole !== 'OWNER') { return true; }
// members can't describe others
return false;
};
var canRemoveRole = function (author, role, state) {
var authorRole = Util.find(state, [author, 'role']);
if (!authorRole) { return false; }
// owners can remove anyone they want
if (authorRole === 'OWNER') { return true; }
// admins can remove other admins or members
if (authorRole === "ADMIN") { return ["ADMIN", "MEMBER"].indexOf(role) !== -1; }
// MEMBERS and non-members cannot remove anyone of any role
return false;
};
var shouldCheckpoint = function (state) {
//
state = state;
};
shouldCheckpoint = shouldCheckpoint; // XXX lint
var commands = Roster.commands = {};
/* Commands are functions with the signature
(args_any, base46_author_string, roster_map, optional_base64_message_id) => boolean
they:
* throw if any of their arguments are invalid
* return true if their application to previous state results in a change
* mutate the local account of the current state
changes to the state can be simulated locally before being sent.
if the simulation throws or returns false, don't send.
*/
// the author is trying to add someone to the roster
// owners can add any role
commands.ADD = function (args, author, roster) {
if (!(args && typeof(args) === 'object' && !Array.isArray(args))) {
throw new Error("INVALID ARGS");
}
if (typeof(roster.state) === 'undefined') {
throw new Error("CANNOT_ADD_TO_UNITIALIZED_ROSTER");
}
var changed = false;
Object.keys(args).forEach(function (curve) {
// FIXME only allow valid curve keys, anything else is pollution
if (curve.length !== 44) {
console.log(curve, curve.length);
throw new Error("INVALID_CURVE_KEY");
}
var data = args[curve];
// ignore anything that isn't a proper object
if (!data || typeof(data) !== 'object' || Array.isArray(data)) {
return;
}
// ignore instructions to ADD someone who is already in the roster
if (roster.state[curve]) { return; }
if (!canAddRole(author, data.role, roster.state)) { return; }
// this will result in a change
changed = true;
roster.state[curve] = data;
});
return changed;
};
commands.RM = function (args, author, roster) {
if (!Array.isArray(args)) { throw new Error("INVALID_ARGS"); }
if (typeof(roster.state) === 'undefined') {
throw new Error("CANNOT_RM_FROM_UNITIALIZED_ROSTER");
}
var changed = false;
args.forEach(function (curve) {
if (isValidId(curve)) { throw new Error("INVALID_CURVE_KEY"); }
// don't try to remove something that isn't there
if (!roster.state[curve]) { return; }
var role = roster.state[curve].role;
if (!canRemoveRole(author, role, roster.state)) { return; }
changed = true;
delete roster.state[curve];
});
return changed;
};
commands.DESCRIBE = function (args, author, roster) {
if (!args || typeof(args) !== 'object' || Array.isArray(args)) {
throw new Error("INVALID_ARGUMENTS");
}
if (typeof(roster.state) === 'undefined') {
throw new Error("CANNOT_DESCRIBE_MEMBERS_OF_UNITIALIZED_ROSTER");
}
var changed = false;
Object.keys(args).forEach(function (curve) {
if (!isValidId(curve)) { return; }
if (!roster.state[curve]) { return; }
if (!canDescribeTarget(author, curve, roster.state)) { return; }
var data = args[curve];
if (!data || typeof(data) !== 'object' || Array.isArray(data)) { return; }
var current = roster.state[curve];
Object.keys(data).forEach(function (key) {
if (current[key] === data[key]) { return; }
changed = true;
current[key] = data[key];
});
});
return changed;
/*
args: {
userkey: {
field: newValue
},
}
*/
// owners can update information about any team member
// admins can update information about members
// members can update information about themselves
// non-members cannot update anything
//roster = roster;
};
// XXX what about concurrent checkpoints? Let's solve for race conditions...
commands.CHECKPOINT = function (args, author, roster) {
// args: complete state
// args should be a map
if (!(args && typeof(args) === 'object' && !Array.isArray(args))) { throw new Error("INVALID_CHECKPOINT_STATE"); }
if (typeof(roster.state) === 'undefined') {
// either you're connecting from the beginning of the log
// or from a trusted lastKnownHash.
// Either way, initialize the roster state
roster.state = args;
return true;
} else if (Sortify(args) !== Sortify(roster.state)) {
// a checkpoint must reinsert the previous state
throw new Error("CHECKPOINT_DOES_NOT_MATCH_PREVIOUS_STATE");
}
// otherwise, you're iterating over the log from a previous checkpoint
// so you should know everyone's role
// owners and admins can checkpoint. members and non-members cannot
if (!canCheckpoint(author, roster)) { return false; }
// set the state, and indicate that a change was made
roster.state = args;
return true;
};
var handleCommand = function (content, author, roster) {
if (!(Array.isArray(content) && typeof(author) === 'string')) {
throw new Error("INVALID ARGUMENTS");
}
var command = content[0];
if (typeof(commands[command]) !== 'function') { throw new Error('INVALID_COMMAND'); }
return commands[command](content[1], author, roster);
};
var clone = function (o) {
return JSON.parse(JSON.stringify(o));
};
var simulate = function (content, author, roster) {
return handleCommand(content, author, clone(roster));
};
Roster.create = function (config, _cb) {
if (typeof(_cb) !== 'function') { throw new Error("EXPECTED_CALLBACK"); }
var cb = Util.once(Util.mkAsync(_cb));
if (!config.network) { return void cb("EXPECTED_NETWORK"); }
if (!config.channel) { return void cb("EXPECTED_CHANNEL"); }
if (!config.owners) { return void cb("EXPECTED_OWNERS"); }
if (!config.crypto) { return void cb("EXPECTED_CRYPTO"); }
if (!config.channel || typeof(config.channel) !== 'string' || config.channel.length !== 32) { return void cb("EXPECTED_CHANNEL"); }
if (!config.owners || !Array.isArray(config.owners)) { return void cb("EXPECTED_OWNERS"); }
if (!config.keys || typeof(config.keys) !== 'object') { return void cb("EXPECTED_CRYPTO_KEYS"); }
if (!config.anon_rpc) { return void cb("EXPECTED_ANON_RPC"); }
var anon_rpc = config.anon_rpc;
var keys = config.keys;
var me = keys.myCurvePublic;
var channel = config.channel;
var ref = {};
var roster = {};
/* Commands
* addUser(key, role) // owner, member
* describeUser(key, data) // mailbox, role
* removeUser(key)
*/
var events = {
change: Util.mkEvent(),
};
/* Events
* checkpoint(id)
* description(data)
* metadata change
*/
roster.on = function (key, handler) {
if (typeof(events[key]) !== 'object') { throw new Error("unsupported event"); }
events[key].reg(handler);
};
roster.off = function (key, handler) {
if (typeof(events[key]) !== 'object') { throw new Error("unsupported event"); }
events[key].unreg(handler);
};
roster.getState = function () {
return ref.state;
};
var ready = false;
var onReady = function (/* info */) {
@ -33,40 +313,141 @@ var factory = function (Util, Hash, CPNetflux) {
cb(void 0, roster);
};
// onError (deleted or expired)
// you won't be able to connect
// onMetadataUpdate
// update owners?
// deleted while you are open
// emit an event
var onChannelError = function (info) {
if (!ready) { return void cb(info); } // XXX make sure we don't reconnect
if (!ready) { return void cb(info); } // XXX make sure we don't reconnect
console.error("CHANNEL_ERROR", info);
};
var onConnect = function (/* wc, sendMessage */) {
Util.both(Util.bake(console.log, "onConnect"), console.log).apply(null, arguments);
console.log("ROSTER CONNECTED");
};
var onMessage = function (msg, user, vKey, isCp , hash, author) {
//console.log("onMessage");
//console.log(typeof(msg), msg);
var parsed = Util.tryParse(msg);
if (!parsed) { return void console.error("could not parse"); }
var changed;
try {
changed = handleCommand(parsed, author, ref);
} catch (err) {
console.error(err);
}
if (changed) { events.change.fire(); }
return void console.log(msg);
};
var isReady = function () {
return Boolean(ready && me);
};
var metadata, crypto;
var send = function (msg, cb) {
if (!isReady()) { return void cb("NOT_READY"); }
var changed = false;
try {
// simulate the command before you send it
changed = simulate(msg, keys.myCurvePublic, ref);
} catch (err) {
return void cb(err);
}
if (!changed) { return void cb("NO_CHANGE"); }
var ciphertext = crypto.encrypt(Sortify(msg));
anon_rpc.send('WRITE_PRIVATE_MESSAGE', [
channel,
ciphertext
], function (err) {
if (err) { return void cb(err); }
cb();
});
};
roster.init = function (_data, cb) {
var data = clone(_data);
data.role = 'OWNER';
var state = {};
state[me] = data;
send([ 'CHECKPOINT', state ], cb);
};
// commands
roster.checkpoint = function () {
send([ 'CHECKPOINT', ref.state], cb);
};
roster.add = function (data, cb) {
send([ 'ADD', data ], cb);
};
roster.remove = function (data, cb) {
send([ 'REMOVE', data ], cb);
};
var onMessage = function (msg, user, vKey, isCp, hash /*, author */) {
if (isCp) { roster.lastKnownCp = hash; }
console.log("onMessage");
console.log.apply(null, arguments);
roster.describe = function (data, cb) {
send(['DESCRIBE', data], cb);
};
nThen(function (w) {
// get metadata so we know the owners and validateKey
anon_rpc.send('GET_METADATA', channel, function (err, data) {
if (err) {
w.abort();
return void console.error(err);
}
metadata = ref.metadata = (data && data[0]) || undefined;
console.log("TEAM_METADATA", metadata);
});
}).nThen(function (w) {
if (!config.keys.teamEdPublic && metadata && metadata.validateKey) {
config.keys.teamEdPublic = metadata.validateKey;
}
CPNetflux.start({
lastKnownHash: config.lastKnownHash,
try {
crypto = Crypto.Team.createEncryptor(config.keys);
} catch (err) {
w.abort();
return void cb(err);
}
}).nThen(function () {
CPNetflux.start({
// if you don't have a lastKnownHash you will need the full history
// passing -1 forces the server to send all messages, otherwise
// malicious users with the signing key could send cp| messages
// and fool new users into initializing their session incorrectly
lastKnownHash: config.lastKnownHash || -1,
network: config.network,
channel: config.channel,
network: config.network,
channel: config.channel,
crypto: config.crypto,
validateKey: config.validateKey,
crypto: crypto,
validateKey: config.keys.teamEdPublic,
owners: config.owners,
owners: config.owners,
onChannelError: onChannelError,
onReady: onReady,
onConnect: onConnect,
onConnectionChange: function () {},
onMessage: onMessage,
onChannelError: onChannelError,
onReady: onReady,
onConnect: onConnect,
onConnectionChange: function () {},
onMessage: onMessage,
noChainPad: true,
noChainPad: true,
});
});
};
@ -77,19 +458,28 @@ var factory = function (Util, Hash, CPNetflux) {
module.exports = factory(
require("../common-util"),
require("../common-hash"),
require("../../bower_components/chainpad-netflux/chainpad-netflux.js")
require("../../bower_components/chainpad-netflux/chainpad-netflux.js"),
require("../../bower_components/json.sortify"),
require("nthen"),
require("../../bower_components/chainpad-crypto/crypto")
);
} else if ((typeof(define) !== 'undefined' && define !== null) && (define.amd !== null)) {
define([
'/common/common-util.js',
'/common/common-hash.js',
'/bower_components/chainpad-netflux/chainpad-netflux.js',
'/bower_compoents/json.sortify/dist/JSON.sortify.js',
'/bower_components/nthen/index.js',
'/bower_components/chainpad-crypto/crypto.js'
//'/bower_components/tweetnacl/nacl-fast.min.js',
], function (Util, Hash, CPNF) {
], function (Util, Hash, CPNF, Sortify, nThen, Crypto) {
return factory.apply(null, [
Util,
Hash,
CPNF
CPNF,
Sortify,
nThen,
Crypto
]);
});
} else {

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