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PyLink/plugins/changehost.py

68 lines
2.1 KiB
Python

"""
Changehost plugin - automatically changes the hostname of matching users.
"""
# Import hacks to access utils and log.
import sys
import os
sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
import string
# ircmatch library from https://github.com/mammon-ircd/ircmatch
# (pip install ircmatch)
import ircmatch
import utils
import world
from log import log
# Characters allowed in a hostname.
allowed_chars = string.ascii_letters + '-./:'
def handle_uid(irc, sender, command, args):
"""
Listener for new connections.
"""
changehost_conf = irc.conf.get("changehost")
if not changehost_conf:
log.warning("(%s) Missing 'changehost:' configuration block; "
"Changehost will not function correctly!", irc.name)
return
elif irc.name not in changehost_conf.get('enabled_nets'):
# We're not enabled on the network, break.
return
changehost_hosts = changehost_conf.get('hosts')
if not changehost_hosts:
log.warning("(%s) No hosts were defined in changehost::hosts; "
"Changehost will not function correctly!", irc.name)
return
target = args['uid']
for host_glob, host_template in changehost_hosts.items():
if ircmatch.match(0, host_glob, utils.getHostmask(irc, target)):
# This uses template strings for simple substitution:
# https://docs.python.org/3/library/string.html#template-strings
template = string.Template(host_template)
# Substitute using the fields provided the hook data. This means
# that the following variables are available for substitution:
# $uid, $ts, $nick, $realhost, $host, $ident, $ip
new_host = template.substitute(args)
# Replace characters that are not allowed in hosts with "-".
for char in new_host:
if char not in allowed_chars:
new_host = new_host.replace(char, '-')
irc.proto.updateClient(target, 'HOST', new_host)
# Only operate on the first match.
break
utils.add_hook(handle_uid, 'UID')