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zhabogram/inc/xmppcomponent.rb

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require 'xmpp4r'
require 'sqlite3'
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#############################
### Some constants #########
::HELP_MESSAGE = "Unknown command. \n\n Please, use /login <phonenumber> to try log in. ☺"
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#############################
#############################
## XMPP Transport Class #####
#############################
class XMPPComponent
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# init class and set logger #
def initialize(params)
@logger = Logger.new(STDOUT); @logger.level = params['loglevel'] || Logger::DEBUG; @logger.progname = '[XMPPComponent]'
@config = { host: params["host"] || 'localhost', port: params["port"] || 8899, jid: params["jid"] || 'tlgrm.rxtx.us', secret: params['secret'] || '' } # default config
@sessions = {}
@db = SQLite3::Database.new(params['db_path'] || 'users.db')
@db.execute("CREATE TABLE IF NOT EXISTS users(jid varchar(256), tg_login varchar(256), PRIMARY KEY(jid) );")
@db.results_as_hash = true
end
# database #
def load_db(jid = nil) # load
@logger.info "Initializing database..."
query = (jid.nil?) ? "SELECT * FROM users" : "SELECT * FROM users where jid = '%s';" % jid
@logger.debug(query)
@db.execute(query) do |user|
@logger.info "Found session for JID %s and TG login %s" % [ user["jid"].to_s, user["tg_login"] ]
@sessions[user["jid"]] = XMPPSession.new(user["jid"], user["tg_login"])
end
end
def update_db(jid, delete = false) # write
return if not @sessions.key? jid
@logger.info "Writing database [add %s].." % jid.to_s
query = (delete) ? "DELETE FROM users where jid = '%s';" % jid.to_s : "INSERT OR REPLACE INTO users(jid, tg_login) VALUES('%s', '%s');" % [jid.to_s, @sessions[jid].tg_login.to_s]
@logger.debug query
@db.execute(query)
end
# transport initialization & connecting to XMPP server #
def connect() # :jid => transport_jid, :host => xmpp_server, :port => xmpp_component_port, :secret => xmpp_component_secret
@logger.info "Connecting.."
begin
@@transport = Jabber::Component.new( @config[:jid] )
@@transport.connect( @config[:host], @config[:port] )
@@transport.auth( @config[:secret] )
@@transport.add_message_callback do |msg| msg.first_element_text('body') ? self.message_handler(msg) : nil end
@@transport.add_presence_callback do |presence| self.presence_handler(presence) end
@@transport.add_iq_callback do |iq| self.iq_handler(iq) end
@logger.info "Connection established"
self.load_db()
@logger.info 'Found %s sessions in database.' % @sessions.count
@sessions.each do |jid, session|
@logger.info "Sending presence to %s" % jid
p = Jabber::Presence.new()
p.to = jid
p.from = @@transport.jid
p.type = :subscribe
@logger.debug p
@@transport.send(p)
end
Thread.stop()
rescue Exception => e
@logger.info 'Connection failed: %s' % e
@db.close
exit 1
end
end
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#############################
#### Callback handlers #####
#############################
# new message to XMPP component #
def message_handler(msg)
@logger.info 'New message from [%s] to [%s]' % [msg.from, msg.to]
return self.process_internal_command(msg.from.bare.to_s, msg.first_element_text('body') ) if msg.to == @@transport.jid # treat message as internal command if received as transport jid
return @sessions[msg.from.bare.to_s].queue_message(msg.to.to_s, msg.first_element_text('body')) if @sessions.key? msg.from.bare.to_s and @sessions[msg.from.bare.to_s].online? # queue message for processing session is active for jid from
end
def presence_handler(presence)
@logger.info "New presence iq received"
@logger.debug(presence)
if presence.type == :subscribe then reply = presence.answer(false); reply.type = :subscribed; @@transport.send(reply); end # send "subscribed" reply to "subscribe" presence
if presence.to == @@transport.jid and @sessions.key? presence.from.bare.to_s and presence.type == :unavailable then @sessions[presence.from.bare.to_s].offline!; return; end # go offline when received offline presence from jabber user
if presence.to == @@transport.jid and @sessions.key? presence.from.bare.to_s then @sessions[presence.from.bare.to_s].connect(); return; end # connect if we have session
end
def iq_handler(iq)
@logger.info "New iq received"
@logger.debug(iq)
end
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#############################
#### Command handlers #####
#############################
# process internal /command #
def process_internal_command(jfrom, body)
case body.split[0] # /command argument = [command, argument]
when '/login' # creating new session if not exists and connect if user already has session
@sessions[jfrom] = XMPPSession.new(jfrom, body.split[1]) if not @sessions.key? jfrom
@sessions[jfrom].connect()
self.update_db(jfrom)
when '/code', '/password' # pass auth data if we have session
typ = body.split[0][1..8]
data = body.split[1]
@sessions[jfrom].enter_auth_data(typ, data) if @sessions.key? jfrom
when '/disconnect' # going offline without destroying a session
@sessions[jfrom].offline! if @sessions.key? jfrom
when '/logout' # destroying session
@sessions[jfrom].offline! if @sessions.key? jfrom
self.update_db(jfrom, true)
@sessions.delete(jfrom)
else # unknown command -- display help #
msg = Jabber::Message.new
msg.from = @@transport.jid
msg.to = jfrom
msg.body = ::HELP_MESSAGE
msg.type = :chat
@@transport.send(msg)
end
end
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end
#############################
## XMPP Session Class #######
#############################
class XMPPSession < XMPPComponent
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attr_reader :user_jid, :tg_login, :tg_auth_data, :message_queue
attr_accessor :online
# start XMPP user session and Telegram client instance #
def initialize(jid, tg_login)
@logger = Logger.new(STDOUT); @logger.progname = '[XMPPSession: %s/%s]' % [jid, tg_login] # init logger
@logger.info "Initializing new XMPPSession..."
@user_jid, @tg_login, @tg_auth_data, @message_queue = jid, tg_login, {code: nil, password: nil}, Queue.new() # init class variables
end
# connect to tg #
def connect()
return if self.online?
@logger.info "Starting Telegram session"
@online = nil
@telegram_thr = Thread.new{ TelegramClient.new(self, @tg_login) } # init tg instance in new thread
end
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###########################################
# send message to current user via XMPP #
def send_message(from = nil, body = '')
@logger.info "Incoming message from Telegram network <- %s" % from.to_s
reply = Jabber::Message.new
reply.type = :chat
reply.from = from.nil? ? @@transport.jid : from.to_s+'@'+@@transport.jid.to_s
reply.to = @user_jid
reply.body = body
@logger.debug reply
@@transport.send(reply)
end
# subscription request to current user via XMPP #
def subscription_req(from, nickname = nil)
@logger.info "Subscription request from %s.." %from.to_s
req = Jabber::Presence.new()
req.from = from.nil? ? @@transport.jid : from.to_s+'@'+@@transport.jid.to_s # presence <from>
req.to = @user_jid # presence <to>
req.type = :subscribe
req.add_element('nick', {'xmlns' => 'http://jabber.org/protocol/nick'} ).add_text(nickname) unless nickname.nil?
@logger.debug req
@@transport.send(req)
end
# presence update #
def presence_update(from, status, message, type = nil)
@logger.info "Presence update request from %s.." %from.to_s
req = Jabber::Presence.new()
req.from = from.nil? ? @@transport.jid : from.to_s+'@'+@@transport.jid.to_s # presence <from>
req.to = @user_jid # presence <to>
req.show = status unless status.nil? # presence <show>
req.type = type unless type.nil? # pres. type
req.status = message # presence message
@logger.debug req
@@transport.send(req)
end
###########################################
# queue message (we will share this queue within :message_queue to Telegram client thread) #
def queue_message(to, text = '')
@logger.info "Queuing message to be sent to Telegram network user -> " % to
@message_queue << {to: to.split('@')[0], text: text}
end
# enter auth data (we will share this data within :tg_auth_data to Telegram client thread ) #
def enter_auth_data(typ, data)
@logger.info "Authorizing in Telegram network with :%s" % typ
@tg_auth_data[typ.to_sym] = data
end
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###########################################
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# session status #
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def online?() @online end
def online!() @online = true; @tg_auth = {}; self.subscription_req(nil); self.presence_update(nil, nil, "Logged in as " + @tg_login.to_s) end
def offline!() @online = false; self.presence_update(nil, nil, "Logged out", :unavailable); end
end