forked from G-Ray/hyperchat
/
index.js
122 lines (97 loc) · 2.76 KB
/
index.js
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#!/usr/bin/env node
var hypercore = require('hypercore')
var level = require('level-party')
var path = require('path')
var swarm = require('discovery-swarm')
var defaults = require('datland-swarm-defaults')
var home = require('os-homedir')
var minimist = require('minimist')
var events = require('events');
var protocol = require('hypercore-protocol')
protocol = protocol.use('sendKeys')
// All the keys
var keys = []
var cnt = 0
var argv = minimist(process.argv.slice(2))
if (argv.help) {
console.error('Usage: hyperchat [options]')
console.error()
console.error(' --feed=[feed-key] Feed of one participant')
console.error()
process.exit(1)
}
var db = level(path.join(home(), '.hyperchat.db'))
var core = hypercore(db)
var myFeed = core.createFeed()
console.log('my key is ' + myFeed.key.toString('hex'))
console.log('my discovery key is ' + myFeed.discoveryKey.toString('hex'))
// Share our feed
join(myFeed)
// Join another feed to chat with another peer
if (argv.feed) {
var feed = core.createFeed(argv.feed)
join(feed);
readFeed(feed);
}
// Share a feed
function join(feed) {
console.log('joining ' + feed.key.toString('hex'))
keys.push(feed.key.toString('hex'))
var sw = swarm(defaults({
hash: false,
stream: function() {
return feed.replicate({stream: createStream(feed)})
}
}))
sw.join(feed.discoveryKey)
sw.on('connection', function (peer) {
console.log('(peer joined)')
peer.on('close', function () {
console.log('(peer left)')
var index = keys.indexOf(feed.key.toString('hex'))
keys.slice(index, 1) // remove a key
//console.log(keys.length + ' keys');
})
})
}
function createStream(feed) {
var p = protocol()
p.on('handshake', function () {
console.log('handshake!')
var channel = p.open(feed.key)
// TODO: need to encrypt messages
channel.on('sendKeys', function (receivedKeys) {
var receivedKeys = JSON.parse(receivedKeys)
//console.log(receivedKeys)
for (key of receivedKeys) {
if (keys.indexOf(key) != -1) continue // Key is already registered
var feed = core.createFeed(key)
// Share and read the feed
join(feed);
readFeed(feed);
}
})
channel.sendKeys((JSON.stringify(keys)))
})
return p
}
// Tail a feed
function readFeed(feed) {
feed.get(0, function (err) {
if (err) throw err
var end = feed.blocks
var stream = tail()
function tail () {
var stream = feed.createReadStream({live: true, start: 0})
.on('data', function (data) {
console.log('> ' + data.toString())
})
return stream
}
})
}
// Append our messages to our feed
process.stdin.on('data', function(data) {
var message = data.toString().trim()
myFeed.append(message)
});