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xmpp.coffee
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xmpp.coffee
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Robot = require('hubot').robot()
Adapter = require('hubot').adapter()
Xmpp = require 'node-xmpp'
util = require 'util'
class XmppBot extends Adapter
run: ->
options =
username: process.env.HUBOT_XMPP_USERNAME
password: process.env.HUBOT_XMPP_PASSWORD
host: process.env.HUBOT_XMPP_HOST
port: process.env.HUBOT_XMPP_PORT
rooms: @parseRooms process.env.HUBOT_XMPP_ROOMS.split(',')
keepaliveInterval: 30000 # ms interval to send whitespace to xmpp server
@robot.logger.info util.inspect(options)
@client = new Xmpp.Client
jid: options.username
password: options.password
host: options.host
port: options.port
@client.on 'error', @.error
@client.on 'online', @.online
@client.on 'stanza', @.read
@options = options
error: (error) =>
@robot.logger.error error.toString()
online: =>
@robot.logger.info 'Hubot XMPP client online'
@client.send new Xmpp.Element('presence', type: 'available' )
.c('show').t('chat')
# join each room
# http://xmpp.org/extensions/xep-0045.html for XMPP chat standard
for room in @options.rooms
@client.send do =>
el = new Xmpp.Element('presence', to: "#{room.jid}/#{@robot.name}" )
x = el.c('x', xmlns: 'http://jabber.org/protocol/muc' )
x.c('history', seconds: 1 ) # prevent the server from confusing us with old messages
# and it seems that servers don't reliably support maxchars
# or zero values
if (room.password) then x.c('password').t(room.password)
return x
# send raw whitespace for keepalive
setInterval =>
@client.send ' '
, @options.keepaliveInterval
parseRooms: (items) ->
rooms = []
for room in items
index = room.indexOf(':')
rooms.push
jid: room.slice(0, if index > 0 then index else room.length)
password: if index > 0 then room.slice(index+1) else false
return rooms
read: (stanza) =>
if stanza.attrs.type is 'error'
@robot.logger.error '[xmpp error]' + stanza
return
switch stanza.name
when 'message'
@readMessage stanza
when 'presence'
@readPresence stanza
readMessage: (stanza) =>
# ignore non-messages
return if stanza.attrs.type not in ['groupchat', 'direct', 'chat']
# ignore empty bodies (i.e., topic changes -- maybe watch these someday)
body = stanza.getChild 'body'
return unless body
message = body.getText()
[room, from] = stanza.attrs.from.split '/'
# ignore our own messages in rooms
return if from == @robot.name or from == @options.username or from is undefined
# note that 'from' isn't a full JID, just the local user part
user = @userForId from
user.type = stanza.attrs.type
user.room = room
@receive new Robot.TextMessage user, message
readPresence: (stanza) =>
jid = new Xmpp.JID(stanza.attrs.from)
bareJid = jid.bare().toString()
# xmpp doesn't add types for standard available mesages
# note that upon joining a room, server will send available
# presences for all members
# http://xmpp.org/rfcs/rfc3921.html#rfc.section.2.2.1
stanza.attrs.type ?= 'available'
# Parse a stanza and figure out where it came from.
getFrom = (stanza) =>
if bareJid not in @options.rooms
from = stanza.attrs.from
else
# room presence is stupid, and optional for some anonymous rooms
# http://xmpp.org/extensions/xep-0045.html#enter-nonanon
from = stanza.getChild('x', 'http://jabber.org/protocol/muc#user')?.getChild('item')?.attrs?.jid
return from
switch stanza.attrs.type
when 'subscribe'
@robot.logger.debug "#{stanza.attrs.from} subscribed to us"
@client.send new Xmpp.Element('presence',
from: stanza.attrs.to
to: stanza.attrs.from
id: stanza.attrs.id
type: 'subscribed'
)
when 'probe'
@client.send new Xmpp.Element('presence',
from: stanza.attrs.to
to: stanza.attrs.from
id: stanza.attrs.id
)
when 'available'
# for now, user IDs and user names are the same. we don't
# use full JIDs as user ID, since we don't get them in
# standard groupchat messages
from = getFrom(stanza)
return if not from?
[room, from] = from.split '/'
# ignore presence messages that sometimes get broadcast
return if not @messageFromRoom room
# If the presence is from us, track that.
# Xmpp sends presence for every person in a room, when join it
# Only after we've heard our own presence should we respond to
# presence messages.
if from == @robot.name or from == @options.username
@heardOwnPresence = true
return
return unless @heardOwnPresence
@robot.logger.debug "Availability received for #{from}"
user = @userForId from, room: room, jid: jid.toString()
@receive new Robot.EnterMessage user
when 'unavailable'
from = getFrom(stanza)
[room, from] = from.split '/'
# ignore presence messages that sometimes get broadcast
return if not @messageFromRoom room
# ignore our own messages in rooms
return if from == @robot.name or from == @options.username
@robot.logger.debug "Unavailability received for #{from}"
user = @userForId from, room: room, jid: jid.toString()
@receive new Robot.LeaveMessage(user)
# Checks that the room parameter is a room the bot is in.
messageFromRoom: (room) ->
for joined in @options.rooms
return true if joined.jid == room
return false
send: (user, strings...) ->
for str in strings
@robot.logger.debug "Sending to #{user.room}: #{str}"
params =
to: if user.type in ['direct', 'chat'] then "#{user.room}/#{user.id}" else user.room
type: user.type or 'groupchat'
from: @options.username
message = new Xmpp.Element('message', params).
c('body').t(str)
@client.send message
reply: (user, strings...) ->
for str in strings
@send user, "#{user.name}: #{str}"
topic: (user, strings...) ->
string = strings.join "\n"
message = new Xmpp.Element('message',
to: user.room
type: user.type
).
c('subject').t(string)
@client.send message
exports.use = (robot) ->
new XmppBot robot