examples: add an example MIX bot

(does the same as the current MUC bot)

examples/mix.py

@@ -0,0 +1,162 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+"""
+    Slixmpp: The Slick XMPP Library
+    Copyright (C) 2021 Mathieu Pasquet
+    This file is part of Slixmpp.
+
+    See the file LICENSE for copying permission.
+"""
+
+import logging
+from getpass import getpass
+from argparse import ArgumentParser
+
+import slixmpp
+
+
+class MIXBot(slixmpp.ClientXMPP):
+
+    """
+    A simple Slixmpp bot that will greets those
+    who enter the room, and acknowledge any messages
+    that mentions the bot's nickname.
+    """
+
+    def __init__(self, jid, password, room, nick):
+        slixmpp.ClientXMPP.__init__(self, jid, password)
+
+        self.room = room
+        self.rooms = set()
+        self.nick = nick
+
+        # The session_start event will be triggered when
+        # the bot establishes its connection with the server
+        # and the XML streams are ready for use. We want to
+        # listen for this event so that we we can initialize
+        # our roster.
+        self.add_event_handler("session_start", self.start)
+
+        # The mix_message event is triggered whenever a message
+        # stanza is received from any chat room.
+        self.add_event_handler("mix_message", self.mix_message)
+
+        # The mix_participant_info_publish event is triggered whenever
+        # an occupant joins or leaves the channel (not linked to
+        # actual presence)
+        self.add_event_handler("mix_participant_info_publish",
+                               self.mix_joined)
+
+
+    async def start(self, event):
+        """
+        Process the session_start event.
+
+        Typical actions for the session_start event are
+        requesting the roster and broadcasting an initial
+        presence stanza.
+        """
+        # The goal here is to fetch the already joined MIX channels
+        # which are present in the roster.
+        _, mix_rooms = await self.plugin['xep_0405'].get_mix_roster()
+        for room in mix_rooms:
+            self.rooms.add(room['jid'])
+        self.send_presence()
+        if self.room not in self.rooms:
+            # If we are not joined, we need to. This will carry over
+            # the next restarts
+            await self.plugin['xep_0405'].join_channel(
+                self.room,
+                self.nick,
+            )
+
+    def mix_message(self, msg):
+        """
+        Process incoming message stanzas from any chat room. Be aware
+        that if you also have any handlers for the 'message' event,
+        message stanzas may be processed by both handlers, so check
+        the 'type' attribute when using a 'message' event handler.
+
+        Whenever the bot's nickname is mentioned, respond to
+        the message.
+
+        IMPORTANT: Always check that a message is not from yourself,
+                   otherwise you will create an infinite loop responding
+                   to your own messages.
+
+        This handler will reply to messages that mention
+        the bot's nickname.
+
+        Arguments:
+            msg -- The received message stanza. See the documentation
+                   for stanza objects and the Message stanza to see
+                   how it may be used.
+        """
+        if msg['mix']['nick'] != self.nick and self.nick in msg['body']:
+            self.send_message(mto=msg['from'].bare,
+                              mbody="I heard that, %s." % msg['mix']['nick'],
+                              mtype='groupchat')
+
+    def mix_joined(self, event):
+        """
+        We receive a publish event whenever someone joins the MIX channel.
+        It contains the nickname of the new participant, and the JID when
+        the channel is not a "JID Hidden channel".
+        """
+        participant = event['pubsub_event']['items']['item']['mix_participant']
+        if participant['nick'] != self.nick:
+            self.send_message(mto=event['from'].bare,
+                              mbody="Hello, %s" % participant['nick'],
+                              mtype='groupchat')
+
+
+if __name__ == '__main__':
+    # Setup the command line arguments.
+    parser = ArgumentParser()
+
+    # Output verbosity options.
+    parser.add_argument("-q", "--quiet", help="set logging to ERROR",
+                        action="store_const", dest="loglevel",
+                        const=logging.ERROR, default=logging.INFO)
+    parser.add_argument("-d", "--debug", help="set logging to DEBUG",
+                        action="store_const", dest="loglevel",
+                        const=logging.DEBUG, default=logging.INFO)
+
+    # JID and password options.
+    parser.add_argument("-j", "--jid", dest="jid",
+                        help="JID to use")
+    parser.add_argument("-p", "--password", dest="password",
+                        help="password to use")
+    parser.add_argument("-r", "--room", dest="room",
+                        help="MIX channel to join")
+    parser.add_argument("-n", "--nick", dest="nick",
+                        help="MIX nickname")
+
+    args = parser.parse_args()
+
+    # Setup logging.
+    logging.basicConfig(level=args.loglevel,
+                        format='%(levelname)-8s %(message)s')
+
+    if args.jid is None:
+        args.jid = input("Username: ")
+    if args.password is None:
+        args.password = getpass("Password: ")
+    if args.room is None:
+        args.room = input("MIX channel: ")
+    if args.nick is None:
+        args.nick = input("MIX nickname: ")
+
+    # Setup the MIXBot and register plugins. Note that while plugins may
+    # have interdependencies, the order in which you register them does
+    # not matter.
+    xmpp = MIXBot(args.jid, args.password, args.room, args.nick)
+    xmpp.register_plugin('xep_0030') # Service Discovery
+    xmpp.register_plugin('xep_0199') # XMPP Ping
+    xmpp.register_plugin('xep_0369') # MIX Core
+    xmpp.register_plugin('xep_0405') # MIX PAM
+
+    # Connect to the XMPP server and start processing XMPP stanzas.
+    xmpp.connect()
+    xmpp.process()