feat: add Slack channel support
This commit is contained in:
Kamal
205
nanobot/channels/slack.py
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205
nanobot/channels/slack.py
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"""Slack channel implementation using Socket Mode."""
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import asyncio
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import re
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from typing import Any
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from loguru import logger
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from slack_sdk.socket_mode.aiohttp import SocketModeClient
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from slack_sdk.socket_mode.request import SocketModeRequest
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from slack_sdk.socket_mode.response import SocketModeResponse
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from slack_sdk.web.async_client import AsyncWebClient
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from nanobot.bus.events import OutboundMessage
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from nanobot.bus.queue import MessageBus
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from nanobot.channels.base import BaseChannel
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from nanobot.config.schema import SlackConfig
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class SlackChannel(BaseChannel):
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"""Slack channel using Socket Mode."""
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name = "slack"
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def __init__(self, config: SlackConfig, bus: MessageBus):
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super().__init__(config, bus)
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self.config: SlackConfig = config
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self._web_client: AsyncWebClient | None = None
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self._socket_client: SocketModeClient | None = None
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self._bot_user_id: str | None = None
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async def start(self) -> None:
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"""Start the Slack Socket Mode client."""
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if not self.config.bot_token or not self.config.app_token:
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logger.error("Slack bot/app token not configured")
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return
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if self.config.mode != "socket":
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logger.error(f"Unsupported Slack mode: {self.config.mode}")
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return
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self._running = True
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self._web_client = AsyncWebClient(token=self.config.bot_token)
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self._socket_client = SocketModeClient(
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app_token=self.config.app_token,
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web_client=self._web_client,
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)
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self._socket_client.socket_mode_request_listeners.append(self._on_socket_request)
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# Resolve bot user ID for mention handling
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try:
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auth = await self._web_client.auth_test()
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self._bot_user_id = auth.get("user_id")
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logger.info(f"Slack bot connected as {self._bot_user_id}")
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except Exception as e:
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logger.warning(f"Slack auth_test failed: {e}")
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logger.info("Starting Slack Socket Mode client...")
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await self._socket_client.connect()
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while self._running:
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await asyncio.sleep(1)
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async def stop(self) -> None:
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"""Stop the Slack client."""
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self._running = False
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if self._socket_client:
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try:
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await self._socket_client.close()
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except Exception as e:
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logger.warning(f"Slack socket close failed: {e}")
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self._socket_client = None
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async def send(self, msg: OutboundMessage) -> None:
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"""Send a message through Slack."""
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if not self._web_client:
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logger.warning("Slack client not running")
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return
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try:
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slack_meta = msg.metadata.get("slack", {}) if msg.metadata else {}
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thread_ts = slack_meta.get("thread_ts")
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channel_type = slack_meta.get("channel_type")
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# Only reply in thread for channel/group messages; DMs don't use threads
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use_thread = thread_ts and channel_type != "im"
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await self._web_client.chat_postMessage(
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channel=msg.chat_id,
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text=msg.content or "",
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thread_ts=thread_ts if use_thread else None,
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)
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except Exception as e:
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logger.error(f"Error sending Slack message: {e}")
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async def _on_socket_request(
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self,
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client: SocketModeClient,
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req: SocketModeRequest,
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) -> None:
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"""Handle incoming Socket Mode requests."""
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if req.type != "events_api":
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return
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# Acknowledge right away
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await client.send_socket_mode_response(
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SocketModeResponse(envelope_id=req.envelope_id)
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)
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payload = req.payload or {}
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event = payload.get("event") or {}
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event_type = event.get("type")
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# Handle app mentions or plain messages
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if event_type not in ("message", "app_mention"):
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return
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sender_id = event.get("user")
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chat_id = event.get("channel")
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# Ignore bot/system messages to prevent loops
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if event.get("subtype") == "bot_message" or event.get("subtype"):
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return
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if self._bot_user_id and sender_id == self._bot_user_id:
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return
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# Avoid double-processing: Slack sends both `message` and `app_mention`
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# for mentions in channels. Prefer `app_mention`.
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text = event.get("text") or ""
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if event_type == "message" and self._bot_user_id and f"<@{self._bot_user_id}>" in text:
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return
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# Debug: log basic event shape
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logger.debug(
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"Slack event: type={} subtype={} user={} channel={} channel_type={} text={}",
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event_type,
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event.get("subtype"),
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sender_id,
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chat_id,
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event.get("channel_type"),
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text[:80],
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)
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if not sender_id or not chat_id:
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return
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channel_type = event.get("channel_type") or ""
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if not self._is_allowed(sender_id, chat_id, channel_type):
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return
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if channel_type != "im" and not self._should_respond_in_channel(event_type, text, chat_id):
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return
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text = self._strip_bot_mention(text)
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thread_ts = event.get("thread_ts") or event.get("ts")
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# Add :eyes: reaction to the triggering message (best-effort)
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try:
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if self._web_client and event.get("ts"):
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await self._web_client.reactions_add(
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channel=chat_id,
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name="eyes",
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timestamp=event.get("ts"),
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)
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except Exception as e:
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logger.debug(f"Slack reactions_add failed: {e}")
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await self._handle_message(
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sender_id=sender_id,
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chat_id=chat_id,
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content=text,
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metadata={
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"slack": {
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"event": event,
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"thread_ts": thread_ts,
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"channel_type": channel_type,
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}
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},
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)
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def _is_allowed(self, sender_id: str, chat_id: str, channel_type: str) -> bool:
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if channel_type == "im":
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if not self.config.dm.enabled:
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return False
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if self.config.dm.policy == "allowlist":
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return sender_id in self.config.dm.allow_from
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return True
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# Group / channel messages
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if self.config.group_policy == "allowlist":
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return chat_id in self.config.group_allow_from
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return True
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def _should_respond_in_channel(self, event_type: str, text: str, chat_id: str) -> bool:
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if self.config.group_policy == "open":
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return True
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if self.config.group_policy == "mention":
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if event_type == "app_mention":
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return True
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return self._bot_user_id is not None and f"<@{self._bot_user_id}>" in text
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if self.config.group_policy == "allowlist":
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return chat_id in self.config.group_allow_from
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return False
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def _strip_bot_mention(self, text: str) -> str:
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if not text or not self._bot_user_id:
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return text
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return re.sub(rf"<@{re.escape(self._bot_user_id)}>\s*", "", text).strip()
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