"""
Bots are a special child typeclasses of
Account that are controlled by the server.
"""
import time
from django.conf import settings
from evennia.accounts.accounts import DefaultAccount
from evennia.scripts.scripts import DefaultScript
from evennia.utils import search
from evennia.utils import utils
from django.utils.translation import gettext as _
_IDLE_TIMEOUT = settings.IDLE_TIMEOUT
_IRC_ENABLED = settings.IRC_ENABLED
_RSS_ENABLED = settings.RSS_ENABLED
_GRAPEVINE_ENABLED = settings.GRAPEVINE_ENABLED
_SESSIONS = None
# Bot helper utilities
[docs]class BotStarter(DefaultScript):
"""
This non-repeating script has the
sole purpose of kicking its bot
into gear when it is initialized.
"""
[docs] def at_script_creation(self):
"""
Called once, when script is created.
"""
self.key = "botstarter"
self.desc = "bot start/keepalive"
self.persistent = True
self.db.started = False
[docs] def at_start(self):
"""
Kick bot into gear.
"""
if not self.db.started:
self.account.start()
self.db.started = True
[docs] def at_repeat(self):
"""
Called self.interval seconds to keep connection. We cannot use
the IDLE command from inside the game since the system will
not catch it (commands executed from the server side usually
has no sessions). So we update the idle counter manually here
instead. This keeps the bot getting hit by IDLE_TIMEOUT.
"""
global _SESSIONS
if not _SESSIONS:
from evennia.server.sessionhandler import SESSIONS as _SESSIONS
for session in _SESSIONS.sessions_from_account(self.account):
session.update_session_counters(idle=True)
[docs] def at_server_reload(self):
"""
If server reloads we don't need to reconnect the protocol
again, this is handled by the portal reconnect mechanism.
"""
self.db.started = True
[docs] def at_server_shutdown(self):
"""
Make sure we are shutdown.
"""
self.db.started = False
#
# Bot base class
[docs]class Bot(DefaultAccount):
"""
A Bot will start itself when the server starts (it will generally
not do so on a reload - that will be handled by the normal Portal
session resync)
"""
[docs] def basetype_setup(self):
"""
This sets up the basic properties for the bot.
"""
# the text encoding to use.
self.db.encoding = "utf-8"
# A basic security setup (also avoid idle disconnects)
lockstring = (
"examine:perm(Admin);edit:perm(Admin);delete:perm(Admin);"
"boot:perm(Admin);msg:false();noidletimeout:true()"
)
self.locks.add(lockstring)
# set the basics of being a bot
script_key = str(self.key)
self.scripts.add(BotStarter, key=script_key)
self.is_bot = True
[docs] def start(self, **kwargs):
"""
This starts the bot, whatever that may mean.
"""
pass
[docs] def msg(self, text=None, from_obj=None, session=None, options=None, **kwargs):
"""
Evennia -> outgoing protocol
"""
super().msg(text=text, from_obj=from_obj, session=session, options=options, **kwargs)
[docs] def execute_cmd(self, raw_string, session=None):
"""
Incoming protocol -> Evennia
"""
super().msg(raw_string, session=session)
[docs] def at_server_shutdown(self):
"""
We need to handle this case manually since the shutdown may be
a reset.
"""
for session in self.sessions.all():
session.sessionhandler.disconnect(session)
# Bot implementations
# IRC
[docs]class IRCBot(Bot):
"""
Bot for handling IRC connections.
"""
# override this on a child class to use custom factory
factory_path = "evennia.server.portal.irc.IRCBotFactory"
[docs] def start(
self,
ev_channel=None,
irc_botname=None,
irc_channel=None,
irc_network=None,
irc_port=None,
irc_ssl=None,
):
"""
Start by telling the portal to start a new session.
Args:
ev_channel (str): Key of the Evennia channel to connect to.
irc_botname (str): Name of bot to connect to irc channel. If
not set, use `self.key`.
irc_channel (str): Name of channel on the form `#channelname`.
irc_network (str): URL of the IRC network, like `irc.freenode.net`.
irc_port (str): Port number of the irc network, like `6667`.
irc_ssl (bool): Indicates whether to use SSL connection.
"""
if not _IRC_ENABLED:
# the bot was created, then IRC was turned off. We delete
# ourselves (this will also kill the start script)
self.delete()
return
global _SESSIONS
if not _SESSIONS:
from evennia.server.sessionhandler import SESSIONS as _SESSIONS
# if keywords are given, store (the BotStarter script
# will not give any keywords, so this should normally only
# happen at initialization)
if irc_botname:
self.db.irc_botname = irc_botname
elif not self.db.irc_botname:
self.db.irc_botname = self.key
if ev_channel:
# connect to Evennia channel
channel = search.channel_search(ev_channel)
if not channel:
raise RuntimeError(f"Evennia Channel '{ev_channel}' not found.")
channel = channel[0]
channel.connect(self)
self.db.ev_channel = channel
if irc_channel:
self.db.irc_channel = irc_channel
if irc_network:
self.db.irc_network = irc_network
if irc_port:
self.db.irc_port = irc_port
if irc_ssl:
self.db.irc_ssl = irc_ssl
# instruct the server and portal to create a new session with
# the stored configuration
configdict = {
"uid": self.dbid,
"botname": self.db.irc_botname,
"channel": self.db.irc_channel,
"network": self.db.irc_network,
"port": self.db.irc_port,
"ssl": self.db.irc_ssl,
}
_SESSIONS.start_bot_session(self.factory_path, configdict)
[docs] def at_msg_send(self, **kwargs):
"Shortcut here or we can end up in infinite loop"
pass
[docs] def get_nicklist(self, caller):
"""
Retrive the nick list from the connected channel.
Args:
caller (Object or Account): The requester of the list. This will
be stored and echoed to when the irc network replies with the
requested info.
Notes: Since the return is asynchronous, the caller is stored internally
in a list; all callers in this list will get the nick info once it
returns (it is a custom OOB inputfunc option). The callback will not
survive a reload (which should be fine, it's very quick).
"""
if not hasattr(self, "_nicklist_callers"):
self._nicklist_callers = []
self._nicklist_callers.append(caller)
super().msg(request_nicklist="")
return
[docs] def ping(self, caller):
"""
Fire a ping to the IRC server.
Args:
caller (Object or Account): The requester of the ping.
"""
if not hasattr(self, "_ping_callers"):
self._ping_callers = []
self._ping_callers.append(caller)
super().msg(ping="")
[docs] def reconnect(self):
"""
Force a protocol-side reconnect of the client without
having to destroy/recreate the bot "account".
"""
super().msg(reconnect="")
[docs] def msg(self, text=None, **kwargs):
"""
Takes text from connected channel (only).
Args:
text (str, optional): Incoming text from channel.
Keyword Args:
options (dict): Options dict with the following allowed keys:
- from_channel (str): dbid of a channel this text originated from.
- from_obj (list): list of objects sending this text.
"""
from_obj = kwargs.get("from_obj", None)
options = kwargs.get("options", None) or {}
if not self.ndb.ev_channel and self.db.ev_channel:
# cache channel lookup
self.ndb.ev_channel = self.db.ev_channel
if (
"from_channel" in options
and text
and self.ndb.ev_channel.dbid == options["from_channel"]
):
if not from_obj or from_obj != [self]:
super().msg(channel=text)
[docs] def execute_cmd(self, session=None, txt=None, **kwargs):
"""
Take incoming data and send it to connected channel. This is
triggered by the bot_data_in Inputfunc.
Args:
session (Session, optional): Session responsible for this
command. Note that this is the bot.
txt (str, optional): Command string.
Keyword Args:
user (str): The name of the user who sent the message.
channel (str): The name of channel the message was sent to.
type (str): Nature of message. Either 'msg', 'action', 'nicklist'
or 'ping'.
nicklist (list, optional): Set if `type='nicklist'`. This is a list
of nicks returned by calling the `self.get_nicklist`. It must look
for a list `self._nicklist_callers` which will contain all callers
waiting for the nicklist.
timings (float, optional): Set if `type='ping'`. This is the return
(in seconds) of a ping request triggered with `self.ping`. The
return must look for a list `self._ping_callers` which will contain
all callers waiting for the ping return.
"""
if kwargs["type"] == "nicklist":
# the return of a nicklist request
if hasattr(self, "_nicklist_callers") and self._nicklist_callers:
chstr = f"{self.db.irc_channel} ({self.db.irc_network}:{self.db.irc_port})"
nicklist = ", ".join(sorted(kwargs["nicklist"], key=lambda n: n.lower()))
for obj in self._nicklist_callers:
obj.msg(
_("Nicks at {chstr}:\n {nicklist}").format(chstr=chstr, nicklist=nicklist)
)
self._nicklist_callers = []
return
elif kwargs["type"] == "ping":
# the return of a ping
if hasattr(self, "_ping_callers") and self._ping_callers:
chstr = f"{self.db.irc_channel} ({self.db.irc_network}:{self.db.irc_port})"
for obj in self._ping_callers:
obj.msg(
_("IRC ping return from {chstr} took {time}s.").format(
chstr=chstr, time=kwargs["timing"]
)
)
self._ping_callers = []
return
elif kwargs["type"] == "privmsg":
# A private message to the bot - a command.
user = kwargs["user"]
if txt.lower().startswith("who"):
# return server WHO list (abbreviated for IRC)
global _SESSIONS
if not _SESSIONS:
from evennia.server.sessionhandler import SESSIONS as _SESSIONS
whos = []
t0 = time.time()
for sess in _SESSIONS.get_sessions():
delta_cmd = t0 - sess.cmd_last_visible
delta_conn = t0 - session.conn_time
account = sess.get_account()
whos.append(
"%s (%s/%s)"
% (
utils.crop("|w%s|n" % account.name, width=25),
utils.time_format(delta_conn, 0),
utils.time_format(delta_cmd, 1),
)
)
text = f"Who list (online/idle): {', '.join(sorted(whos, key=lambda w: w.lower()))}"
elif txt.lower().startswith("about"):
# some bot info
text = f"This is an Evennia IRC bot connecting from '{settings.SERVERNAME}'."
else:
text = "I understand 'who' and 'about'."
super().msg(privmsg=((text,), {"user": user}))
else:
# something to send to the main channel
if kwargs["type"] == "action":
# An action (irc pose)
text = f"{kwargs['user']}@{kwargs['channel']} {txt}"
else:
# msg - A normal channel message
text = f"{kwargs['user']}@{kwargs['channel']}: {txt}"
if not self.ndb.ev_channel and self.db.ev_channel:
# cache channel lookup
self.ndb.ev_channel = self.db.ev_channel
if self.ndb.ev_channel:
self.ndb.ev_channel.msg(text, senders=self)
#
# RSS
# Grapevine bot
[docs]class GrapevineBot(Bot):
"""
g Grapevine (https://grapevine.haus) relayer. The channel to connect to is the first
name in the settings.GRAPEVINE_CHANNELS list.
"""
factory_path = "evennia.server.portal.grapevine.RestartingWebsocketServerFactory"
[docs] def start(self, ev_channel=None, grapevine_channel=None):
"""
Start by telling the portal to connect to the grapevine network.
"""
if not _GRAPEVINE_ENABLED:
self.delete()
return
global _SESSIONS
if not _SESSIONS:
from evennia.server.sessionhandler import SESSIONS as _SESSIONS
# connect to Evennia channel
if ev_channel:
# connect to Evennia channel
channel = search.channel_search(ev_channel)
if not channel:
raise RuntimeError(f"Evennia Channel '{ev_channel}' not found.")
channel = channel[0]
channel.connect(self)
self.db.ev_channel = channel
if grapevine_channel:
self.db.grapevine_channel = grapevine_channel
# these will be made available as properties on the protocol factory
configdict = {"uid": self.dbid, "grapevine_channel": self.db.grapevine_channel}
_SESSIONS.start_bot_session(self.factory_path, configdict)
[docs] def at_msg_send(self, **kwargs):
"Shortcut here or we can end up in infinite loop"
pass
[docs] def msg(self, text=None, **kwargs):
"""
Takes text from connected channel (only).
Args:
text (str, optional): Incoming text from channel.
Keyword Args:
options (dict): Options dict with the following allowed keys:
- from_channel (str): dbid of a channel this text originated from.
- from_obj (list): list of objects sending this text.
"""
from_obj = kwargs.get("from_obj", None)
options = kwargs.get("options", None) or {}
if not self.ndb.ev_channel and self.db.ev_channel:
# cache channel lookup
self.ndb.ev_channel = self.db.ev_channel
if (
"from_channel" in options
and text
and self.ndb.ev_channel.dbid == options["from_channel"]
):
if not from_obj or from_obj != [self]:
# send outputfunc channel(msg, chan, sender)
# TODO we should refactor channel formatting to operate on the
# account/object level instead. For now, remove the channel/name
# prefix since we pass that explicitly anyway
prefix, text = text.split(":", 1)
super().msg(
channel=(
text.strip(),
self.db.grapevine_channel,
", ".join(obj.key for obj in from_obj),
{},
)
)
[docs] def execute_cmd(
self,
txt=None,
session=None,
event=None,
grapevine_channel=None,
sender=None,
game=None,
**kwargs,
):
"""
Take incoming data from protocol and send it to connected channel. This is
triggered by the bot_data_in Inputfunc.
"""
if event == "channels/broadcast":
# A private message to the bot - a command.
text = f"{sender}@{game}: {txt}"
if not self.ndb.ev_channel and self.db.ev_channel:
# simple cache of channel lookup
self.ndb.ev_channel = self.db.ev_channel
if self.ndb.ev_channel:
self.ndb.ev_channel.msg(text, senders=self)
