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""" |
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syslog2irc.routing |
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~~~~~~~~~~~~~~~~~~ |
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Routing of syslog messages to IRC channels by the port they arrive on. |
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:Copyright: 2007-2021 Jochen Kupperschmidt |
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:License: MIT, see LICENSE for details. |
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""" |
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from __future__ import annotations |
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from collections import defaultdict |
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from dataclasses import dataclass |
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import logging |
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from typing import Any, Optional |
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from .network import format_port, Port |
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logger = logging.getLogger(__name__) |
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@dataclass(frozen=True) |
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class Route: |
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"""A route from a syslog message receiver port to an IRC channel.""" |
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syslog_port: Port |
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irc_channel_name: str |
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class Router: |
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"""Map syslog port numbers to IRC channel names.""" |
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def __init__(self, routes: set[Route]) -> None: |
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self.ports_to_channel_names = map_ports_to_channel_names(routes) |
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self.channel_names_to_ports = map_channel_names_to_ports( |
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self.ports_to_channel_names |
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) |
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self.enabled_channels: set[str] = set() |
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def enable_channel( |
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self, sender: Any, *, channel_name: Optional[str] = None |
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) -> None: |
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ports = self.channel_names_to_ports.get(channel_name, set()) |
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if not ports: |
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logger.warning( |
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'No syslog ports routed to IRC channel %s, ' |
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'will not forward to it.', |
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channel_name, |
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) |
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return |
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self.enabled_channels.add(channel_name) |
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logger.info( |
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'Enabled forwarding to IRC channel %s from syslog port(s) %s.', |
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channel_name, |
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', '.join(map(format_port, sorted(ports))), |
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) |
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def is_channel_enabled(self, channel: str) -> bool: |
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return channel in self.enabled_channels |
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def get_channel_names_for_port(self, port: Port) -> set[str]: |
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return self.ports_to_channel_names[port] |
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def map_ports_to_channel_names(routes: set[Route]) -> dict[Port, set[str]]: |
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ports_to_channel_names = defaultdict(set) |
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for route in routes: |
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ports_to_channel_names[route.syslog_port].add(route.irc_channel_name) |
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return dict(ports_to_channel_names) |
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def map_channel_names_to_ports( |
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ports_to_channel_names: dict[Port, set[str]] |
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) -> dict[str, set[Port]]: |
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channel_names_to_ports = defaultdict(set) |
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for port, channel_names in ports_to_channel_names.items(): |
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for channel_name in channel_names: |
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channel_names_to_ports[channel_name].add(port) |
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return dict(channel_names_to_ports) |
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homeworkprod /
syslog2irc
