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var IRC = require('irc')
var FeedParser = require('feedparser')
var Request = require('request')
var Parse = require('shell-quote').parse
var FS = require('fs')
var irc_server = 'ire.retiolum'
var master_nick = 'knews'
var news_channel = '#news'
var feeds_file = 'new_feeds'
var feedbot_loop_delay = 60 * 1000 // [ms]
var slaves = {}
function main () {
var master = new IRC.Client(irc_server, master_nick, {
channels: [ news_channel ],
})
master.on('message' + news_channel, function (nick, text, message) {
if (is_talking_to(master_nick, text)) {
var request = parse_request(text)
if (request) {
return run_command(request.method, request.params, function (error, result) {
if (error) {
return master.say(news_channel, '4' + error)
} else {
return master.say(news_channel, result)
}
})
}
}
})
master.once('registered', function () {
// read feeds file and create a feedbot for each entry
FS
.readFileSync(feeds_file)
.toString()
.split('\n')
//.filter((function () {
// var n = 2;
// return function () {
// return n-- > 0
// }
//})())
.filter(function (line) {
return line.length > 0
})
.forEach(function (line) {
var parts = line.split('|')
if (parts.length !== 3) {
console.log('bad new_feeds line ' + lines + ': ' + line)
return
}
var nick = parts[0]
var uri = parts[1]
var channels = parts[2].split(' ')
return create_feedbot(nick, uri, channels)
})
})
}
function create_feedbot (nick, uri, channels) {
var client = new IRC.Client(irc_server, nick, {
channels: channels,
})
slaves[nick] = {
client: client,
nick: nick,
uri: uri,
channels: channels,
}
// say text in every joined channel
function broadcast (text) {
Object.keys(client.chans).forEach(function (channel) {
client.say(channel, text)
})
}
client.once('registered', loop_feedparser)
client.once('registered', deaf_myself)
client.on('error', function (error) {
console.log('Error:', error)
})
// TODO stopping criteria
function loop_feedparser () {
try {
var request = Request(uri)
var feedparser = new FeedParser()
} catch (error) {
return broadcast('4' + error)
}
request.on('error', function (error) {
broadcast('4request ' + error)
})
request.on('response', function (response) {
if (response.statusCode !== 200) {
return this.emit('error', new Error('Bad status code'))
}
var output = response
switch (response.headers['content-encoding']) {
case 'gzip':
output = zlib.createGunzip()
response.pipe(output)
break
case 'deflate':
output = zlib.createInflate()
response.pipe(output)
break
}
this.pipe(feedparser)
})
var items = []
feedparser.on('error', function (error) {
broadcast('4feedparser ' + error)
})
feedparser.on('readable', function () {
for (var item; item = this.read(); ) {
items.push(item)
}
})
feedparser.on('end', function () {
items = items.sort(function (a, b) {
return a.date - b.date
})
var indexOfLastTitle = items
.map(function (x) { return x.title })
.indexOf(client.lastTitle)
var newitems = items
var olditems = []
// if items contain lastTitle, then only items after that are news
if (!!~indexOfLastTitle) {
olditems = newitems.splice(0, indexOfLastTitle + 1)
}
if (newitems.length > 0) {
// only broadcast news if we're not starting up
// (i.e. we already have a lastTitle)
if (client.lastTitle) {
newitems.forEach(function (item) {
return getShortLink(item.link, function (error, shortlink) {
return broadcast(item.title + ' ' + shortlink)
})
})
}
client.lastTitle = newitems[newitems.length - 1].title
}
return setTimeout(loop_feedparser, feedbot_loop_delay)
})
}
function deaf_myself () {
client.send('mode', nick, '+D')
}
}
// return true if text "is talking to" my_nick
function is_talking_to (my_nick, text) {
return text.slice(0, my_nick.length) === my_nick
&& text[my_nick.length] === ':'
}
function parse_request (text) {
var parse = Parse(text)
return {
method: parse[1],
params: parse.slice(2),
}
}
function run_command (methodname, params, callback) {
var method = methods[methodname]
if (method) {
return method(params, callback)
} else {
return callback(new Error('dunno what ' + methodname + ' is'));
}
}
function getShortLink (link, callback) {
return callback(null, link)
}
var methods = {}
methods.add = function (params, callback) {
if (slaves.hasOwnProperty(params[0])) {
return callback(new Error('name already taken'))
} else {
create_feedbot(params[0], params[1], [news_channel])
return callback(null)
}
}
methods.del = function (params, callback) {
var slave = slaves[params[0]]
if (slave) {
slave.client.disconnect()
delete slaves[params[0]]
return callback(null)
} else {
return callback(new Error('botname not found'))
}
}
methods.save = function (params, callback) {
var feeds = Object.keys(slaves)
.map(function (nick) {
return slaves[nick]
})
.map(function (slave) {
return [
slave.nick,
slave.uri,
slave.channels.join(' '),
].join('|')
}).join('\n') + '\n'
return FS.writeFile(feeds_file, feeds, function (error) {
if (error) {
return callback(error)
} else {
return callback(null, 'Feeds saved')
}
})
}
if (require.main === module) {
main()
}
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