feat: implement channel runtime connectors
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"""Telegram channel adapter."""
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from __future__ import annotations
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from collections.abc import Awaitable, Callable
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from typing import Any
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from beaver.foundation.events import InboundMessage, OutboundMessage
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from beaver.interfaces.channels.base import ChannelInboundSink
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from .base import (
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build_inbound_message,
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chunk_text,
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compact_media_summary,
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config_bool,
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config_list,
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mark_unclaimed,
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outbound_target,
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)
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EventRecorder = Callable[..., None]
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class TelegramAdapter:
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"""Telegram Bot API adapter with injectable client support."""
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KIND = "telegram"
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def __init__(
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self,
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*,
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channel_id: str,
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kind: str,
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mode: str,
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account_id: str,
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display_name: str | None,
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inbound_sink: ChannelInboundSink,
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secrets: dict[str, Any] | None = None,
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config: dict[str, Any] | None = None,
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event_recorder: EventRecorder | None = None,
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client: Any | None = None,
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application_factory: Callable[[], Any] | None = None,
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) -> None:
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self.channel_id = channel_id
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self.kind = kind
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self.mode = mode
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self.account_id = account_id
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self.display_name = display_name
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self.inbound_sink = inbound_sink
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self.secrets = secrets or {}
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self.config = config or {}
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self.event_recorder = event_recorder
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self._client = client
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self._application_factory = application_factory
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self._application: Any | None = None
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self.max_message_chars = int(self.config.get("maxMessageChars") or 4096)
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async def start(self) -> None:
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if self._client is not None:
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return
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if self.mode == "polling":
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self._application = self._build_application()
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await self._application.initialize()
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await self._application.start()
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if getattr(self._application, "updater", None) is not None:
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await self._application.updater.start_polling()
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self._client = self._application.bot
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return
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if self.mode == "webhook":
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self._client = self._build_bot()
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return
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raise ValueError(f"Unsupported telegram mode: {self.mode}")
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async def stop(self) -> None:
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if self._application is None:
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return
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updater = getattr(self._application, "updater", None)
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if updater is not None:
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await updater.stop()
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await self._application.stop()
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await self._application.shutdown()
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self._application = None
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async def handle_update_payload(self, payload: dict[str, Any]) -> None:
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message = self._normalize_payload(payload)
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if message is None:
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return
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await self.inbound_sink.accept_inbound(message)
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async def send(self, message: OutboundMessage) -> None:
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target = outbound_target(message)
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if not target.peer_id:
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mark_unclaimed(message)
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return
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client = self._require_client()
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kwargs: dict[str, Any] = {"chat_id": target.peer_id}
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if target.thread_id:
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kwargs["message_thread_id"] = int(target.thread_id) if str(target.thread_id).isdigit() else target.thread_id
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for chunk in chunk_text(message.content, max_chars=self.max_message_chars):
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await client.send_message(**kwargs, text=chunk)
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def _normalize_payload(self, payload: dict[str, Any]) -> InboundMessage | None:
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data = payload.get("message") or payload.get("edited_message")
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if not isinstance(data, dict):
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return None
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chat = data.get("chat") if isinstance(data.get("chat"), dict) else {}
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sender = data.get("from") if isinstance(data.get("from"), dict) else {}
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peer_id = _string_or_none(chat.get("id"))
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if not peer_id:
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return None
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chat_type = str(chat.get("type") or "unknown")
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peer_type = self._peer_type(chat_type)
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user_id = _string_or_none(sender.get("id"))
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message_id = _string_or_none(data.get("message_id"))
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thread_id = _string_or_none(data.get("message_thread_id"))
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content = str(data.get("text") or data.get("caption") or "").strip()
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media_entries = self._media_entries(data)
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if media_entries:
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content = "\n".join([part for part in [content, *media_entries] if part]).strip()
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if not content:
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return None
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if peer_type in {"group", "channel"} and not self._group_allowed(peer_id, user_id):
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return None
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if peer_type == "dm" and not self._dm_allowed(user_id or peer_id):
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return None
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if peer_type in {"group", "channel"} and config_bool(self.config, "requireMentionInGroups", default=False):
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gated = self._strip_required_mention(content)
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if gated is None:
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return None
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content = gated
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metadata = {
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"chat_id": peer_id,
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"message_id": message_id,
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"chat_type": chat_type,
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}
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if media_entries:
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metadata["media"] = media_entries
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return build_inbound_message(
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channel_id=self.channel_id,
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kind=self.kind,
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account_id=self.account_id,
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peer_id=peer_id,
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thread_id=thread_id,
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peer_type=peer_type,
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user_id=user_id,
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message_id=message_id,
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content=content,
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metadata=metadata,
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)
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def _media_entries(self, data: dict[str, Any]) -> list[str]:
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entries: list[str] = []
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if data.get("photo"):
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entries.append(compact_media_summary("photo"))
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for media_type in ("document", "audio", "video"):
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value = data.get(media_type)
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if isinstance(value, dict):
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entries.append(compact_media_summary(media_type, file_name=_string_or_none(value.get("file_name"))))
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return entries
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def _strip_required_mention(self, content: str) -> str | None:
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username = str(self.config.get("botUsername") or "").strip().lstrip("@")
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if not username:
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return None
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mention = f"@{username}"
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if mention not in content:
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return None
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return content.replace(mention, "", 1).strip()
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def _dm_allowed(self, identifier: str | None) -> bool:
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allowlist = config_list(self.config, "allowFrom")
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if not allowlist:
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return True
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return bool(identifier and identifier in allowlist)
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def _group_allowed(self, peer_id: str | None, user_id: str | None) -> bool:
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allowlist = config_list(self.config, "groupAllowFrom")
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if not allowlist:
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return True
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return bool((peer_id and peer_id in allowlist) or (user_id and user_id in allowlist))
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def _peer_type(self, chat_type: str) -> str:
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if chat_type == "private":
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return "dm"
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if chat_type in {"group", "supergroup"}:
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return "group"
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if chat_type == "channel":
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return "channel"
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return chat_type or "unknown"
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def _require_client(self) -> Any:
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if self._client is None:
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self._client = self._build_bot()
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return self._client
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def _build_bot(self) -> Any:
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token = self._require_secret("botToken")
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try:
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from telegram import Bot
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except ImportError as exc: # pragma: no cover - optional live dependency
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raise RuntimeError("Install beaver-backend[telegram] to enable TelegramAdapter") from exc
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return Bot(token=token)
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def _build_application(self) -> Any:
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if self._application_factory is not None:
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return self._application_factory()
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token = self._require_secret("botToken")
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try:
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from telegram.ext import Application
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except ImportError as exc: # pragma: no cover - optional live dependency
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raise RuntimeError("Install beaver-backend[telegram] to enable TelegramAdapter") from exc
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async def handle(update: Any, context: Any) -> None:
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if hasattr(update, "to_dict"):
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await self.handle_update_payload(update.to_dict())
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application = Application.builder().token(token).build()
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try:
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from telegram.ext import MessageHandler, filters
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application.add_handler(MessageHandler(filters.ALL, handle))
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except Exception:
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pass
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return application
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def _require_secret(self, key: str) -> str:
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value = self.secrets.get(key)
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if not value:
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raise ValueError(f"{key} is required")
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return str(value)
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def _string_or_none(value: Any) -> str | None:
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if value is None:
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return None
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text = str(value).strip()
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return text or None
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