518 lines
18 KiB
JavaScript
518 lines
18 KiB
JavaScript
define([
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'/common/common-util.js',
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'/common/common-hash.js',
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'/common/common-realtime.js',
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'/common/common-messaging.js',
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'/common/notify.js',
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'/common/outer/mailbox-handlers.js',
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'/bower_components/chainpad-netflux/chainpad-netflux.js',
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'/bower_components/chainpad-crypto/crypto.js',
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], function (Util, Hash, Realtime, Messaging, Notify, Handlers, CpNetflux, Crypto) {
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var Mailbox = {};
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var TYPES = [
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'notifications',
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'supportadmin',
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'support'
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];
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var BLOCKING_TYPES = [
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];
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var initializeMailboxes = function (ctx, mailboxes) {
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if (!mailboxes['notifications']) {
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mailboxes.notifications = {
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channel: Hash.createChannelId(),
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lastKnownHash: '',
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viewed: []
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};
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ctx.pinPads([mailboxes.notifications.channel], function (res) {
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if (res.error) { console.error(res); }
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});
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}
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if (!mailboxes['support']) {
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mailboxes.support = {
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channel: Hash.createChannelId(),
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lastKnownHash: '',
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viewed: []
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};
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ctx.pinPads([mailboxes.support.channel], function (res) {
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if (res.error) { console.error(res); }
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});
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}
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};
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/*
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proxy.mailboxes = {
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friends: {
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channel: '',
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lastKnownHash: '',
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viewed: []
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}
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};
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*/
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var isMessageNew = function (hash, m) {
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return (m.viewed || []).indexOf(hash) === -1 && hash !== m.lastKnownHash;
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};
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var showMessage = function (ctx, type, msg, cId, cb) {
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ctx.emit('MESSAGE', {
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type: type,
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content: msg
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}, cId ? [cId] : ctx.clients, cb);
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};
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var hideMessage = function (ctx, type, hash, clients) {
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ctx.emit('VIEWED', {
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type: type,
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hash: hash
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}, clients || ctx.clients);
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};
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var getMyKeys = function (ctx) {
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var proxy = ctx.store && ctx.store.proxy;
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if (!proxy.curvePrivate || !proxy.curvePublic) { return; }
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return {
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curvePrivate: proxy.curvePrivate,
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curvePublic: proxy.curvePublic
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};
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};
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// Send a message to someone else
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var sendTo = Mailbox.sendTo = function (ctx, type, msg, user, _cb) {
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var cb = _cb || function (obj) {
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if (obj && obj.error) {
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console.error(obj.error);
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}
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};
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if (!Crypto.Mailbox) {
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return void cb({error: "chainpad-crypto is outdated and doesn't support mailboxes."});
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}
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var keys = getMyKeys(ctx);
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if (!keys) { return void cb({error: "missing asymmetric encryption keys"}); }
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if (!user || !user.channel || !user.curvePublic) { return void cb({error: "no notification channel"}); }
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var anonRpc = Util.find(ctx, [ 'store', 'anon_rpc', ]);
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if (!anonRpc) { return void cb({error: "anonymous rpc session not ready"}); }
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var crypto = Crypto.Mailbox.createEncryptor(keys);
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// Always send your data
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if (typeof(msg) === "object" && !msg.user) {
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var myData = Messaging.createData(ctx.store.proxy, false);
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msg.user = myData;
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}
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var text = JSON.stringify({
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type: type,
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content: msg
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});
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var ciphertext = crypto.encrypt(text, user.curvePublic);
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anonRpc.send("WRITE_PRIVATE_MESSAGE", [
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user.channel,
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ciphertext
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], function (err /*, response */) {
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if (err) {
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return void cb({
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error: err,
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});
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}
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return void cb();
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});
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};
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// Mark a message as read
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var dismiss = function (ctx, data, cId, cb) {
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var type = data.type;
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var hash = data.hash;
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var m = Util.find(ctx, ['store', 'proxy', 'mailboxes', type]);
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if (!m) { return void cb({error: 'NOT_FOUND'}); }
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var box = ctx.boxes[type];
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if (!box) { return void cb({error: 'NOT_LOADED'}); }
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// If the hash in in our history, get the index from the history:
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// - if the index is 0, we can change our lastKnownHash
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// - otherwise, just push to view
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var idx = box.history.indexOf(hash);
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if (idx !== -1) {
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if (idx === 0) {
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m.lastKnownHash = hash;
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box.history.shift();
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} else if (m.viewed.indexOf(hash) === -1) {
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m.viewed.push(hash);
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}
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}
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// Clear data in memory if needed
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// Check the "viewed" array to see if we're able to bump lastKnownhash more
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var sliceIdx;
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var lastKnownHash;
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var toForget = [];
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box.history.some(function (hash, i) {
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// naming here is confusing... isViewed implies it's a boolean
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// when in fact it's an index
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var isViewed = m.viewed.indexOf(hash);
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// iterate over your history until you hit an element you haven't viewed
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if (isViewed === -1) { return true; }
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// update the index that you'll use to slice off viewed parts of history
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sliceIdx = i + 1;
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// keep track of which hashes you should remove from your 'viewed' array
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toForget.push(hash);
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// prevent fetching dismissed messages on (re)connect
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lastKnownHash = hash;
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});
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// remove all elements in 'toForget' from the 'viewed' array in one step
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m.viewed = m.viewed.filter(function (hash) {
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return toForget.indexOf(hash) === -1;
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});
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if (sliceIdx) {
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box.history = box.history.slice(sliceIdx);
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m.lastKnownHash = lastKnownHash;
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}
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// Make sure we remove data about dismissed messages
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Object.keys(box.content).forEach(function (h) {
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if (box.history.indexOf(h) === -1 || m.viewed.indexOf(h) !== -1) {
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Handlers.remove(ctx, box, box.content[h], h);
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delete box.content[h];
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}
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});
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Realtime.whenRealtimeSyncs(ctx.store.realtime, function () {
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cb();
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hideMessage(ctx, type, hash, ctx.clients.filter(function (clientId) {
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return clientId !== cId;
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}));
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});
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};
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var openChannel = function (ctx, type, m, onReady) {
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var box = ctx.boxes[type] = {
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channel: m.channel,
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type: type,
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queue: [], // Store the messages to send when the channel is ready
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history: [], // All the hashes loaded from the server in corretc order
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content: {}, // Content of the messages that should be displayed
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sendMessage: function (msg) { // To send a message to our box
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// Always send your data
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if (typeof(msg) === "object" && !msg.user) {
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var myData = Messaging.createData(ctx.store.proxy, false);
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msg.user = myData;
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}
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try {
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msg = JSON.stringify(msg);
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} catch (e) {
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console.error(e);
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}
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box.queue.push(msg);
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}
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};
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if (!Crypto.Mailbox) {
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return void console.error("chainpad-crypto is outdated and doesn't support mailboxes.");
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}
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var keys = m.keys || getMyKeys(ctx);
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if (!keys) { return void console.error("missing asymmetric encryption keys"); }
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var crypto = Crypto.Mailbox.createEncryptor(keys);
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box.encryptor = crypto;
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var cfg = {
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network: ctx.store.network,
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channel: m.channel,
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noChainPad: true,
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crypto: crypto,
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owners: [ctx.store.proxy.edPublic],
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lastKnownHash: m.lastKnownHash
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};
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cfg.onConnectionChange = function () {}; // Allow reconnections in chainpad-netflux
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cfg.onConnect = function (wc, sendMessage) {
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// Send a message to our box?
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// NOTE: we use our own curvePublic so that we can decrypt our own message :)
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box.sendMessage = function (_msg, cb) {
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cb = cb || function () {};
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var msg;
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try {
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msg = JSON.stringify(_msg);
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} catch (e) {
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console.error(e);
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}
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sendMessage(msg, function (err, hash) {
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if (err) { return void console.error(err); }
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box.history.push(hash);
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box.content[hash] = _msg;
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var message = {
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msg: _msg,
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hash: hash
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};
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showMessage(ctx, type, message);
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cb();
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}, keys.curvePublic);
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};
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box.queue.forEach(function (msg) {
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box.sendMessage(msg);
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});
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box.queue = [];
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};
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var lastReceivedHash; // Don't send a duplicate of the last known hash on reconnect
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box.onMessage = cfg.onMessage = function (msg, user, vKey, isCp, hash, author) {
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if (hash === m.lastKnownHash) { return; }
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if (hash === lastReceivedHash) { return; }
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lastReceivedHash = hash;
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try {
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msg = JSON.parse(msg);
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} catch (e) {
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console.error(e);
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}
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if (author) { msg.author = author; }
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box.history.push(hash);
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if (isMessageNew(hash, m)) {
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// Message should be displayed
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var message = {
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msg: msg,
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hash: hash
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};
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Handlers.add(ctx, box, message, function (dismissed, toDismiss) {
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if (toDismiss) { // List of other messages to remove
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dismiss(ctx, toDismiss, '', function () {
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console.log('Notification handled automatically');
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});
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}
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if (dismissed) { // This message should be removed
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dismiss(ctx, {
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type: type,
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hash: hash
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}, '', function () {
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console.log('Notification handled automatically');
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});
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return;
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}
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box.content[hash] = msg;
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showMessage(ctx, type, message, null, function (obj) {
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if (!box.ready) { return; }
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if (!obj || !obj.msg) { return; }
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Notify.system(undefined, obj.msg);
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});
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});
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} else {
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// Message has already been viewed by the user
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if (Object.keys(box.content).length === 0) {
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// If nothing is displayed yet, we can bump our lastKnownHash and remove this hash
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// from our "viewed" array
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m.lastKnownHash = hash;
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box.history = [];
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var idxViewed = m.viewed.indexOf(hash);
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if (idxViewed !== -1) { m.viewed.splice(idxViewed, 1); }
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}
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}
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};
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cfg.onReady = function () {
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// Clean the "viewed" array: make sure all the "viewed" hashes are
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// in history
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var toClean = [];
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m.viewed.forEach(function (h, i) {
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if (box.history.indexOf(h) === -1) {
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toClean.push(i);
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}
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});
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for (var i = toClean.length-1; i>=0; i--) {
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m.viewed.splice(toClean[i], 1);
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}
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// Listen for changes in the "viewed" and lastKnownHash values
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var view = function (h) {
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Handlers.remove(ctx, box, box.content[h], h);
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delete box.content[h];
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hideMessage(ctx, type, h);
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};
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ctx.store.proxy.on('change', ['mailboxes', type], function (o, n, p) {
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if (p[2] === 'lastKnownHash') {
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// Hide everything up to this hash
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var sliceIdx;
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box.history.some(function (h, i) {
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sliceIdx = i + 1;
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view(h);
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if (h === n) { return true; }
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});
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box.history = box.history.slice(sliceIdx);
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}
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if (p[2] === 'viewed') {
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// Hide this message
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view(n);
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}
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});
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box.ready = true;
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// Continue
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onReady();
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};
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CpNetflux.start(cfg);
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};
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var initializeHistory = function (ctx) {
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var network = ctx.store.network;
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network.on('message', function (msg, sender) {
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if (sender !== network.historyKeeper) { return; }
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var parsed = JSON.parse(msg);
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if (!/HISTORY_RANGE/.test(parsed[0])) { return; }
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var txid = parsed[1];
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var req = ctx.req[txid];
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if (!req) { return; }
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var type = parsed[0];
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var _msg = parsed[2];
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var box = req.box;
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if (type === 'HISTORY_RANGE') {
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if (!Array.isArray(_msg)) { return; }
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var message;
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try {
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var decrypted = box.encryptor.decrypt(_msg[4]);
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message = JSON.parse(decrypted.content);
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message.author = decrypted.author;
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} catch (e) {
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console.log(e);
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}
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ctx.emit('HISTORY', {
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txid: txid,
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time: _msg[5],
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message: message,
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hash: _msg[4].slice(0,64)
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}, [req.cId]);
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} else if (type === 'HISTORY_RANGE_END') {
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ctx.emit('HISTORY', {
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txid: txid,
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complete: true
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}, [req.cId]);
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delete ctx.req[txid];
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}
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});
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};
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var loadHistory = function (ctx, clientId, data, cb) {
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var box = ctx.boxes[data.type];
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if (!box) { return void cb({error: 'ENOENT'}); }
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var msg = [ 'GET_HISTORY_RANGE', box.channel, {
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from: data.lastKnownHash,
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count: data.count,
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txid: data.txid
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}
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];
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ctx.req[data.txid] = {
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cId: clientId,
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box: box
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};
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var network = ctx.store.network;
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network.sendto(network.historyKeeper, JSON.stringify(msg)).then(function () {
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}, function (err) {
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console.error(err);
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});
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};
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var subscribe = function (ctx, data, cId, cb) {
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// Get existing notifications
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Object.keys(ctx.boxes).forEach(function (type) {
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Object.keys(ctx.boxes[type].content).forEach(function (h) {
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var message = {
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msg: ctx.boxes[type].content[h],
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hash: h
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};
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showMessage(ctx, type, message, cId);
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});
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});
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// Subscribe to new notifications
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var idx = ctx.clients.indexOf(cId);
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if (idx === -1) {
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ctx.clients.push(cId);
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}
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cb();
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};
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var removeClient = function (ctx, cId) {
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var idx = ctx.clients.indexOf(cId);
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ctx.clients.splice(idx, 1);
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};
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Mailbox.init = function (cfg, waitFor, emit) {
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var mailbox = {};
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var store = cfg.store;
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var ctx = {
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Store: cfg.Store,
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store: store,
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pinPads: cfg.pinPads,
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updateMetadata: cfg.updateMetadata,
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updateDrive: cfg.updateDrive,
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emit: emit,
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clients: [],
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boxes: {},
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req: {}
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};
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var mailboxes = store.proxy.mailboxes = store.proxy.mailboxes || {};
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initializeMailboxes(ctx, mailboxes);
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initializeHistory(ctx);
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Object.keys(mailboxes).forEach(function (key) {
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if (TYPES.indexOf(key) === -1) { return; }
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var m = mailboxes[key];
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if (BLOCKING_TYPES.indexOf(key) === -1) {
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openChannel(ctx, key, m, function () {
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//console.log(key + ' mailbox is ready');
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});
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} else {
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openChannel(ctx, key, m, waitFor(function () {
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//console.log(key + ' mailbox is ready');
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}));
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}
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});
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mailbox.post = function (box, type, content) {
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var b = ctx.boxes[box];
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if (!b) { return; }
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b.sendMessage({
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type: type,
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content: content,
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sender: store.proxy.curvePublic
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});
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};
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mailbox.open = function (key, m, cb) {
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if (TYPES.indexOf(key) === -1) { return; }
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openChannel(ctx, key, m, cb);
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};
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mailbox.dismiss = function (data, cb) {
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dismiss(ctx, data, '', cb);
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};
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mailbox.sendTo = function (type, msg, user, cb) {
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sendTo(ctx, type, msg, user, cb);
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};
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mailbox.removeClient = function (clientId) {
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removeClient(ctx, clientId);
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};
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mailbox.execCommand = function (clientId, obj, cb) {
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var cmd = obj.cmd;
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var data = obj.data;
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if (cmd === 'SUBSCRIBE') {
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return void subscribe(ctx, data, clientId, cb);
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}
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if (cmd === 'DISMISS') {
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return void dismiss(ctx, data, clientId, cb);
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}
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if (cmd === 'SENDTO') {
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return void sendTo(ctx, data.type, data.msg, data.user, cb);
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}
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if (cmd === 'LOAD_HISTORY') {
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return void loadHistory(ctx, clientId, data, cb);
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}
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};
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return mailbox;
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};
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return Mailbox;
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});
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