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chore: import upstream snapshot with attribution
2026-07-13 13:00:43 +08:00

1057 lines
40 KiB
Python

"""Telegram channel implementation using python-telegram-bot."""
from __future__ import annotations
import asyncio
from dataclasses import dataclass
import re
import time
from typing import Any, Literal
import unicodedata
from loguru import logger
from pydantic import Field
from telegram import BotCommand, ReplyParameters, Update
from telegram.error import BadRequest, TimedOut
from telegram.ext import Application, CommandHandler, ContextTypes, MessageHandler, filters
from telegram.request import HTTPXRequest
from deeptutor.partners.bus.events import OutboundMessage
from deeptutor.partners.bus.queue import MessageBus
from deeptutor.partners.channels.base import BaseChannel
from deeptutor.partners.config.paths import get_media_dir
from deeptutor.partners.config.schema import DeliveryOverrides, StreamingSupport
from deeptutor.partners.helpers import split_message
from deeptutor.services.partners.commands import build_partner_help_text, partner_command_palette
TELEGRAM_MAX_MESSAGE_LEN = 4000 # Telegram message character limit
TELEGRAM_HTML_MAX_LEN = 4096 # Hard API limit for rendered HTML payloads
TELEGRAM_REPLY_CONTEXT_MAX_LEN = (
TELEGRAM_MAX_MESSAGE_LEN # Max length for reply context in user message
)
_SEND_MAX_RETRIES = 3
_SEND_RETRY_BASE_DELAY = 0.5 # seconds, doubled each retry
_STREAM_EDIT_INTERVAL_DEFAULT = 0.6 # min seconds between edit_message_text calls
@dataclass
class _StreamBuf:
"""Per-chat streaming accumulator for progressive message editing."""
text: str = ""
message_id: int | None = None
last_edit: float = 0.0
stream_id: str | None = None
def _strip_md_block(text: str) -> str:
"""Strip block-level and inline markdown for readable plain-text preview.
Used during streaming mid-edits so users see clean text instead of raw
markdown syntax while the response is still being generated.
"""
text = re.sub(r"```[\w]*\n?([\s\S]*?)```", r"\1", text)
text = re.sub(r"^#{1,6}\s+(.+)$", r"\1", text, flags=re.MULTILINE)
text = re.sub(r"^>\s*(.*)$", r"\1", text, flags=re.MULTILINE)
text = re.sub(r"\*\*(.+?)\*\*", r"\1", text)
text = re.sub(r"__(.+?)__", r"\1", text)
text = re.sub(r"(?<![a-zA-Z0-9])_([^_]+)_(?![a-zA-Z0-9])", r"\1", text)
text = re.sub(r"~~(.+?)~~", r"\1", text)
text = re.sub(r"`([^`]+)`", r"\1", text)
return text
def _strip_md(s: str) -> str:
"""Strip markdown inline formatting from text."""
s = re.sub(r"\*\*(.+?)\*\*", r"\1", s)
s = re.sub(r"__(.+?)__", r"\1", s)
s = re.sub(r"~~(.+?)~~", r"\1", s)
s = re.sub(r"`([^`]+)`", r"\1", s)
return s.strip()
def _render_table_box(table_lines: list[str]) -> str:
"""Convert markdown pipe-table to compact aligned text for <pre> display."""
def dw(s: str) -> int:
return sum(2 if unicodedata.east_asian_width(c) in ("W", "F") else 1 for c in s)
rows: list[list[str]] = []
has_sep = False
for line in table_lines:
cells = [_strip_md(c) for c in line.strip().strip("|").split("|")]
if all(re.match(r"^:?-+:?$", c) for c in cells if c):
has_sep = True
continue
rows.append(cells)
if not rows or not has_sep:
return "\n".join(table_lines)
ncols = max(len(r) for r in rows)
for r in rows:
r.extend([""] * (ncols - len(r)))
widths = [max(dw(r[c]) for r in rows) for c in range(ncols)]
def dr(cells: list[str]) -> str:
return " ".join(f"{c}{' ' * (w - dw(c))}" for c, w in zip(cells, widths))
out = [dr(rows[0])]
out.append(" ".join("─" * w for w in widths))
for row in rows[1:]:
out.append(dr(row))
return "\n".join(out)
def _markdown_to_telegram_html(text: str) -> str:
"""
Convert markdown to Telegram-safe HTML.
"""
if not text:
return ""
# 1. Extract and protect code blocks (preserve content from other processing)
code_blocks: list[str] = []
def save_code_block(m: re.Match) -> str:
code_blocks.append(m.group(1))
return f"\x00CB{len(code_blocks) - 1}\x00"
text = re.sub(r"```[\w]*\n?([\s\S]*?)```", save_code_block, text)
# 1.5. Convert markdown tables to box-drawing (reuse code_block placeholders)
lines = text.split("\n")
rebuilt: list[str] = []
li = 0
while li < len(lines):
if re.match(r"^\s*\|.+\|", lines[li]):
tbl: list[str] = []
while li < len(lines) and re.match(r"^\s*\|.+\|", lines[li]):
tbl.append(lines[li])
li += 1
box = _render_table_box(tbl)
if box != "\n".join(tbl):
code_blocks.append(box)
rebuilt.append(f"\x00CB{len(code_blocks) - 1}\x00")
else:
rebuilt.extend(tbl)
else:
rebuilt.append(lines[li])
li += 1
text = "\n".join(rebuilt)
# 2. Extract and protect inline code
inline_codes: list[str] = []
def save_inline_code(m: re.Match) -> str:
inline_codes.append(m.group(1))
return f"\x00IC{len(inline_codes) - 1}\x00"
text = re.sub(r"`([^`]+)`", save_inline_code, text)
# 3. Headers # Title -> just the title text
text = re.sub(r"^#{1,6}\s+(.+)$", r"\1", text, flags=re.MULTILINE)
# 4. Blockquotes > text -> just the text (before HTML escaping)
text = re.sub(r"^>\s*(.*)$", r"\1", text, flags=re.MULTILINE)
# 5. Escape HTML special characters
text = text.replace("&", "&amp;").replace("<", "&lt;").replace(">", "&gt;")
# 6. Links [text](url) - must be before bold/italic to handle nested cases
text = re.sub(r"\[([^\]]+)\]\(([^)]+)\)", r'<a href="\2">\1</a>', text)
# 7. Bold **text** or __text__
text = re.sub(r"\*\*(.+?)\*\*", r"<b>\1</b>", text)
text = re.sub(r"__(.+?)__", r"<b>\1</b>", text)
# 8. Italic _text_ (avoid matching inside words like some_var_name)
text = re.sub(r"(?<![a-zA-Z0-9])_([^_]+)_(?![a-zA-Z0-9])", r"<i>\1</i>", text)
# 9. Strikethrough ~~text~~
text = re.sub(r"~~(.+?)~~", r"<s>\1</s>", text)
# 10. Bullet lists - item -> • item
text = re.sub(r"^[-*]\s+", "• ", text, flags=re.MULTILINE)
# 11. Restore inline code with HTML tags
for i, code in enumerate(inline_codes):
# Escape HTML in code content
escaped = code.replace("&", "&amp;").replace("<", "&lt;").replace(">", "&gt;")
text = text.replace(f"\x00IC{i}\x00", f"<code>{escaped}</code>")
# 12. Restore code blocks with HTML tags
for i, code in enumerate(code_blocks):
# Escape HTML in code content
escaped = code.replace("&", "&amp;").replace("<", "&lt;").replace(">", "&gt;")
text = text.replace(f"\x00CB{i}\x00", f"<pre><code>{escaped}</code></pre>")
return text
class TelegramConfig(DeliveryOverrides, StreamingSupport):
"""Telegram channel configuration."""
enabled: bool = False
token: str = ""
allow_from: list[str] = Field(default_factory=list)
proxy: str | None = None
reply_to_message: bool = False
group_policy: Literal["open", "mention"] = "mention"
# Outbound API connection pool; long-polling uses its own small pool so
# getUpdates never starves sends.
connection_pool_size: int = 16
pool_timeout: float = 15.0
# Min seconds between in-place stream edits (Telegram flood control).
stream_edit_interval: float = Field(default=_STREAM_EDIT_INTERVAL_DEFAULT, ge=0.1)
class TelegramChannel(BaseChannel):
"""
Telegram channel using long polling.
Simple and reliable - no webhook/public IP needed.
"""
name = "telegram"
display_name = "Telegram"
# Commands registered with Telegram's command menu. Keep this generated
# from the partner command registry so Telegram and Web stay in sync.
BOT_COMMANDS = [
BotCommand("start", "Start the bot"),
*[
BotCommand(spec["command"].removeprefix("/"), spec["description"])
for spec in partner_command_palette()
],
]
@classmethod
def default_config(cls) -> dict[str, Any]:
return TelegramConfig().model_dump(by_alias=True)
def __init__(self, config: Any, bus: MessageBus):
if isinstance(config, dict):
config = TelegramConfig.model_validate(config)
super().__init__(config, bus)
self.config: TelegramConfig = config
self._app: Application | None = None
self._chat_ids: dict[str, int] = {} # Map sender_id to chat_id for replies
self._typing_tasks: dict[str, asyncio.Task] = {} # chat_id -> typing loop task
self._media_group_buffers: dict[str, dict] = {}
self._media_group_tasks: dict[str, asyncio.Task] = {}
self._message_threads: dict[tuple[str, int], int] = {}
self._stream_bufs: dict[str, _StreamBuf] = {} # chat_id -> streaming state
self._bot_user_id: int | None = None
self._bot_username: str | None = None
def is_allowed(self, sender_id: str) -> bool:
"""Preserve Telegram's legacy id|username allowlist matching."""
if super().is_allowed(sender_id):
return True
allow_list = getattr(self.config, "allow_from", [])
if not allow_list or "*" in allow_list:
return False
sender_str = str(sender_id)
if sender_str.count("|") != 1:
return False
sid, username = sender_str.split("|", 1)
if not sid.isdigit() or not username:
return False
return sid in allow_list or username in allow_list
async def start(self) -> None:
"""Start the Telegram bot with long polling."""
if not self.config.token:
logger.error("Telegram bot token not configured")
return
self._running = True
proxy = self.config.proxy or None
# Separate pools so long-polling (getUpdates) never starves outbound
# sends — sharing one pool exhausts it under load and every send
# starts failing with PoolTimeout.
api_request = HTTPXRequest(
connection_pool_size=self.config.connection_pool_size,
pool_timeout=self.config.pool_timeout,
connect_timeout=30.0,
read_timeout=30.0,
proxy=proxy,
)
poll_request = HTTPXRequest(
connection_pool_size=4,
pool_timeout=self.config.pool_timeout,
connect_timeout=30.0,
read_timeout=30.0,
proxy=proxy,
)
builder = (
Application.builder()
.token(self.config.token)
.request(api_request)
.get_updates_request(poll_request)
)
self._app = builder.build()
self._app.add_error_handler(self._on_error)
# Add command handlers
self._app.add_handler(CommandHandler("start", self._on_start))
self._app.add_handler(CommandHandler("help", self._on_help))
# Add message handler for text, photos, voice, documents. Runtime
# slash commands like /new must reach the partner command router.
self._app.add_handler(
MessageHandler(
(
filters.TEXT
| filters.PHOTO
| filters.VOICE
| filters.AUDIO
| filters.Document.ALL
),
self._on_message,
)
)
logger.info("Starting Telegram bot (polling mode)...")
# Initialize and start polling
await self._app.initialize()
await self._app.start()
# Get bot info and register command menu
bot_info = await self._app.bot.get_me()
self._bot_user_id = getattr(bot_info, "id", None)
self._bot_username = getattr(bot_info, "username", None)
logger.info("Telegram bot @{} connected", bot_info.username)
try:
await self._app.bot.set_my_commands(self.BOT_COMMANDS)
logger.debug("Telegram bot commands registered")
except Exception as e:
logger.warning("Failed to register bot commands: {}", e)
# Start polling (this runs until stopped)
await self._app.updater.start_polling(
allowed_updates=["message"],
drop_pending_updates=True, # Ignore old messages on startup
)
# Keep running until stopped
while self._running:
await asyncio.sleep(1)
async def stop(self) -> None:
"""Stop the Telegram bot."""
self._running = False
# Cancel all typing indicators
for chat_id in list(self._typing_tasks):
self._stop_typing(chat_id)
for task in self._media_group_tasks.values():
task.cancel()
self._media_group_tasks.clear()
self._media_group_buffers.clear()
if self._app:
logger.info("Stopping Telegram bot...")
await self._app.updater.stop()
await self._app.stop()
await self._app.shutdown()
self._app = None
@staticmethod
def _get_media_type(path: str) -> str:
"""Guess media type from file extension."""
ext = path.rsplit(".", 1)[-1].lower() if "." in path else ""
if ext in ("jpg", "jpeg", "png", "gif", "webp"):
return "photo"
if ext == "ogg":
return "voice"
if ext in ("mp3", "m4a", "wav", "aac"):
return "audio"
return "document"
async def send(self, msg: OutboundMessage) -> None:
"""Send a message through Telegram."""
if not self._app:
logger.warning("Telegram bot not running")
return
# Only stop typing indicator for final responses
if not msg.metadata.get("_progress", False):
self._stop_typing(msg.chat_id)
try:
chat_id = int(msg.chat_id)
except ValueError:
logger.error("Invalid chat_id: {}", msg.chat_id)
return
reply_to_message_id = msg.metadata.get("message_id")
message_thread_id = msg.metadata.get("message_thread_id")
if message_thread_id is None and reply_to_message_id is not None:
message_thread_id = self._message_threads.get((msg.chat_id, reply_to_message_id))
thread_kwargs = {}
if message_thread_id is not None:
thread_kwargs["message_thread_id"] = message_thread_id
reply_params = None
if self.config.reply_to_message:
if reply_to_message_id:
reply_params = ReplyParameters(
message_id=reply_to_message_id, allow_sending_without_reply=True
)
# Send media files
for media_path in msg.media or []:
try:
media_type = self._get_media_type(media_path)
sender = {
"photo": self._app.bot.send_photo,
"voice": self._app.bot.send_voice,
"audio": self._app.bot.send_audio,
}.get(media_type, self._app.bot.send_document)
param = (
"photo"
if media_type == "photo"
else media_type
if media_type in ("voice", "audio")
else "document"
)
with open(media_path, "rb") as f:
await sender(
chat_id=chat_id,
**{param: f},
reply_parameters=reply_params,
**thread_kwargs,
)
except Exception as e:
filename = media_path.rsplit("/", 1)[-1]
logger.error("Failed to send media {}: {}", media_path, e)
await self._app.bot.send_message(
chat_id=chat_id,
text=f"[Failed to send: {filename}]",
reply_parameters=reply_params,
**thread_kwargs,
)
# Send text content
if msg.content and msg.content != "[empty message]":
is_progress = msg.metadata.get("_progress", False)
for chunk in split_message(msg.content, TELEGRAM_MAX_MESSAGE_LEN):
# Final response: simulate streaming via draft, then persist
if not is_progress:
await self._send_with_streaming(chat_id, chunk, reply_params, thread_kwargs)
else:
await self._send_text(chat_id, chunk, reply_params, thread_kwargs)
async def _send_text(
self,
chat_id: int,
text: str,
reply_params=None,
thread_kwargs: dict | None = None,
) -> None:
"""Send a plain text message with HTML fallback."""
try:
html = _markdown_to_telegram_html(text)
await self._app.bot.send_message(
chat_id=chat_id,
text=html,
parse_mode="HTML",
reply_parameters=reply_params,
**(thread_kwargs or {}),
)
except Exception as e:
logger.warning("HTML parse failed, falling back to plain text: {}", e)
# Let a plain-text failure propagate so the channel manager's
# retry policy applies (send contract: raise on delivery failure).
await self._app.bot.send_message(
chat_id=chat_id,
text=text,
reply_parameters=reply_params,
**(thread_kwargs or {}),
)
async def _send_with_streaming(
self,
chat_id: int,
text: str,
reply_params=None,
thread_kwargs: dict | None = None,
) -> None:
"""Simulate streaming via send_message_draft, then persist with send_message."""
draft_id = int(time.time() * 1000) % (2**31)
try:
step = max(len(text) // 8, 40)
for i in range(step, len(text), step):
await self._app.bot.send_message_draft(
chat_id=chat_id,
draft_id=draft_id,
text=text[:i],
)
await asyncio.sleep(0.04)
await self._app.bot.send_message_draft(
chat_id=chat_id,
draft_id=draft_id,
text=text,
)
await asyncio.sleep(0.15)
except Exception:
pass
await self._send_text(chat_id, text, reply_params, thread_kwargs)
async def _call_with_retry(self, fn, *args, **kwargs):
"""Call an async Telegram API function with retry on timeout and RetryAfter.
This inner retry handles Telegram-specific transient errors (flood
control gives an explicit wait time); persistent failures still raise
so the channel manager's outer policy applies.
"""
from telegram.error import RetryAfter
for attempt in range(1, _SEND_MAX_RETRIES + 1):
try:
return await fn(*args, **kwargs)
except TimedOut:
if attempt == _SEND_MAX_RETRIES:
raise
delay = _SEND_RETRY_BASE_DELAY * (2 ** (attempt - 1))
logger.warning(
"Telegram timeout (attempt {}/{}), retrying in {:.1f}s",
attempt,
_SEND_MAX_RETRIES,
delay,
)
await asyncio.sleep(delay)
except RetryAfter as e:
if attempt == _SEND_MAX_RETRIES:
raise
delay = float(e.retry_after)
logger.warning(
"Telegram flood control (attempt {}/{}), retrying in {:.1f}s",
attempt,
_SEND_MAX_RETRIES,
delay,
)
await asyncio.sleep(delay)
@staticmethod
def _is_not_modified_error(exc: Exception) -> bool:
return isinstance(exc, BadRequest) and "message is not modified" in str(exc).lower()
async def send_delta(
self, chat_id: str, delta: str, metadata: dict[str, Any] | None = None
) -> None:
"""Progressive message editing: send on first delta, edit on subsequent ones."""
if not self._app:
return
meta = metadata or {}
int_chat_id = int(chat_id)
stream_id = meta.get("_stream_id")
if meta.get("_stream_end"):
buf = self._stream_bufs.get(chat_id)
if not buf or not buf.message_id or not buf.text:
return
if stream_id is not None and buf.stream_id is not None and buf.stream_id != stream_id:
return
self._stop_typing(chat_id)
raw_text = buf.text
html = _markdown_to_telegram_html(raw_text)
if len(html) <= TELEGRAM_HTML_MAX_LEN:
primary_html = html
extra_html_chunks = []
else:
html_chunks = split_message(html, TELEGRAM_HTML_MAX_LEN)
primary_html = html_chunks[0]
extra_html_chunks = html_chunks[1:]
try:
await self._call_with_retry(
self._app.bot.edit_message_text,
chat_id=int_chat_id,
message_id=buf.message_id,
text=primary_html,
parse_mode="HTML",
)
except BadRequest as e:
if self._is_not_modified_error(e):
self._stream_bufs.pop(chat_id, None)
return
# Only fall back to plain text on actual HTML parse errors;
# network errors propagate so the manager can retry without
# doubling connection demand during pool exhaustion.
logger.debug("Final stream edit failed (HTML), trying plain: {}", e)
primary_plain = (
split_message(raw_text, TELEGRAM_MAX_MESSAGE_LEN)[0]
if len(raw_text) > TELEGRAM_MAX_MESSAGE_LEN
else raw_text
)
try:
await self._call_with_retry(
self._app.bot.edit_message_text,
chat_id=int_chat_id,
message_id=buf.message_id,
text=primary_plain,
)
except Exception as e2:
if self._is_not_modified_error(e2):
logger.debug("Final stream plain edit already applied for {}", chat_id)
else:
logger.warning("Final stream edit failed: {}", e2)
raise # Let ChannelManager handle retry
for extra_html_chunk in extra_html_chunks:
try:
await self._call_with_retry(
self._app.bot.send_message,
chat_id=int_chat_id,
text=extra_html_chunk,
parse_mode="HTML",
)
except Exception:
await self._send_text(int_chat_id, extra_html_chunk)
self._stream_bufs.pop(chat_id, None)
return
buf = self._stream_bufs.get(chat_id)
if buf is None or (
stream_id is not None and buf.stream_id is not None and buf.stream_id != stream_id
):
buf = _StreamBuf(stream_id=stream_id)
self._stream_bufs[chat_id] = buf
elif buf.stream_id is None:
buf.stream_id = stream_id
buf.text += delta
if not buf.text.strip():
return
now = time.monotonic()
if buf.message_id is None:
preview = _strip_md_block(buf.text)
sent = await self._call_with_retry(
self._app.bot.send_message,
chat_id=int_chat_id,
text=preview,
)
buf.message_id = sent.message_id
buf.last_edit = now
elif (now - buf.last_edit) >= self.config.stream_edit_interval:
if len(buf.text) > TELEGRAM_MAX_MESSAGE_LEN:
await self._flush_stream_overflow(int_chat_id, buf)
buf.last_edit = now
return
preview = _strip_md_block(buf.text)
try:
await self._call_with_retry(
self._app.bot.edit_message_text,
chat_id=int_chat_id,
message_id=buf.message_id,
text=preview,
)
buf.last_edit = now
except Exception as e:
if self._is_not_modified_error(e):
buf.last_edit = now
return
logger.warning("Stream edit failed: {}", e)
raise # Let ChannelManager handle retry
async def _flush_stream_overflow(self, chat_id: int, buf: _StreamBuf) -> None:
"""Split an oversized stream buffer mid-flight.
Edits the current stream message with the first chunk, sends any
intermediate chunks as standalone messages, then opens a new message
for the tail so subsequent deltas continue streaming into it.
"""
chunks = split_message(buf.text, TELEGRAM_MAX_MESSAGE_LEN)
if len(chunks) <= 1:
return
try:
await self._call_with_retry(
self._app.bot.edit_message_text,
chat_id=chat_id,
message_id=buf.message_id,
text=chunks[0],
)
except Exception as e:
if not self._is_not_modified_error(e):
logger.warning("Stream overflow edit failed: {}", e)
raise
for chunk in chunks[1:-1]:
await self._call_with_retry(
self._app.bot.send_message,
chat_id=chat_id,
text=chunk,
)
tail = chunks[-1]
sent = await self._call_with_retry(
self._app.bot.send_message,
chat_id=chat_id,
text=tail,
)
buf.message_id = sent.message_id
buf.text = tail
async def _on_start(self, update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
"""Handle /start command."""
if not update.message or not update.effective_user:
return
user = update.effective_user
# No hard-coded brand here — the partner's own identity (its Soul) comes
# through in conversation; the greeting just onboards the user.
await update.message.reply_text(
f"👋 Hi {user.first_name}!\n\n"
"Send me a message and I'll respond!\n"
"Type /help to see available commands."
)
async def _on_help(self, update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
"""Handle /help command, bypassing ACL so all users can access it."""
if not update.message:
return
await update.message.reply_text(build_partner_help_text())
@staticmethod
def _sender_id(user) -> str:
"""Build sender_id with username for allowlist matching."""
sid = str(user.id)
return f"{sid}|{user.username}" if user.username else sid
@staticmethod
def _derive_topic_session_key(message) -> str | None:
"""Derive topic-scoped session key for non-private Telegram chats."""
message_thread_id = getattr(message, "message_thread_id", None)
if message.chat.type == "private" or message_thread_id is None:
return None
return f"telegram:{message.chat_id}:topic:{message_thread_id}"
@staticmethod
def _build_message_metadata(message, user) -> dict:
"""Build common Telegram inbound metadata payload."""
reply_to = getattr(message, "reply_to_message", None)
return {
"message_id": message.message_id,
"user_id": user.id,
"username": user.username,
"first_name": user.first_name,
"is_group": message.chat.type != "private",
"message_thread_id": getattr(message, "message_thread_id", None),
"is_forum": bool(getattr(message.chat, "is_forum", False)),
"reply_to_message_id": getattr(reply_to, "message_id", None) if reply_to else None,
}
@staticmethod
def _extract_reply_context(message) -> str | None:
"""Extract text from the message being replied to, if any."""
reply = getattr(message, "reply_to_message", None)
if not reply:
return None
text = getattr(reply, "text", None) or getattr(reply, "caption", None) or ""
if len(text) > TELEGRAM_REPLY_CONTEXT_MAX_LEN:
text = text[:TELEGRAM_REPLY_CONTEXT_MAX_LEN] + "..."
return f"[Reply to: {text}]" if text else None
async def _download_message_media(
self, msg, *, add_failure_content: bool = False
) -> tuple[list[str], list[str]]:
"""Download media from a message (current or reply). Returns (media_paths, content_parts)."""
media_file = None
media_type = None
if getattr(msg, "photo", None):
media_file = msg.photo[-1]
media_type = "image"
elif getattr(msg, "voice", None):
media_file = msg.voice
media_type = "voice"
elif getattr(msg, "audio", None):
media_file = msg.audio
media_type = "audio"
elif getattr(msg, "document", None):
media_file = msg.document
media_type = "file"
elif getattr(msg, "video", None):
media_file = msg.video
media_type = "video"
elif getattr(msg, "video_note", None):
media_file = msg.video_note
media_type = "video"
elif getattr(msg, "animation", None):
media_file = msg.animation
media_type = "animation"
if not media_file or not self._app:
return [], []
try:
file = await self._app.bot.get_file(media_file.file_id)
ext = self._get_extension(
media_type,
getattr(media_file, "mime_type", None),
getattr(media_file, "file_name", None),
)
media_dir = get_media_dir("telegram")
unique_id = getattr(media_file, "file_unique_id", media_file.file_id)
file_path = media_dir / f"{unique_id}{ext}"
await file.download_to_drive(str(file_path))
path_str = str(file_path)
if media_type in ("voice", "audio"):
transcription = await self.transcribe_audio(file_path)
if transcription:
logger.info("Transcribed {}: {}...", media_type, transcription[:50])
return [path_str], [f"[transcription: {transcription}]"]
return [path_str], [f"[{media_type}: {path_str}]"]
return [path_str], [f"[{media_type}: {path_str}]"]
except Exception as e:
logger.warning("Failed to download message media: {}", e)
if add_failure_content:
return [], [f"[{media_type}: download failed]"]
return [], []
async def _ensure_bot_identity(self) -> tuple[int | None, str | None]:
"""Load bot identity once and reuse it for mention/reply checks."""
if self._bot_user_id is not None or self._bot_username is not None:
return self._bot_user_id, self._bot_username
if not self._app:
return None, None
bot_info = await self._app.bot.get_me()
self._bot_user_id = getattr(bot_info, "id", None)
self._bot_username = getattr(bot_info, "username", None)
return self._bot_user_id, self._bot_username
@staticmethod
def _has_mention_entity(
text: str,
entities,
bot_username: str,
bot_id: int | None,
) -> bool:
"""Check Telegram mention entities against the bot username."""
handle = f"@{bot_username}".lower()
for entity in entities or []:
entity_type = getattr(entity, "type", None)
if entity_type == "text_mention":
user = getattr(entity, "user", None)
if user is not None and bot_id is not None and getattr(user, "id", None) == bot_id:
return True
continue
if entity_type != "mention":
continue
offset = getattr(entity, "offset", None)
length = getattr(entity, "length", None)
if offset is None or length is None:
continue
if text[offset : offset + length].lower() == handle:
return True
return handle in text.lower()
async def _is_group_message_for_bot(self, message) -> bool:
"""Allow group messages when policy is open, @mentioned, or replying to the bot."""
if message.chat.type == "private" or self.config.group_policy == "open":
return True
bot_id, bot_username = await self._ensure_bot_identity()
if bot_username:
text = message.text or ""
caption = message.caption or ""
if self._has_mention_entity(
text,
getattr(message, "entities", None),
bot_username,
bot_id,
):
return True
if self._has_mention_entity(
caption,
getattr(message, "caption_entities", None),
bot_username,
bot_id,
):
return True
reply_user = getattr(getattr(message, "reply_to_message", None), "from_user", None)
return bool(bot_id and reply_user and reply_user.id == bot_id)
def _remember_thread_context(self, message) -> None:
"""Cache topic thread id by chat/message id for follow-up replies."""
message_thread_id = getattr(message, "message_thread_id", None)
if message_thread_id is None:
return
key = (str(message.chat_id), message.message_id)
self._message_threads[key] = message_thread_id
if len(self._message_threads) > 1000:
self._message_threads.pop(next(iter(self._message_threads)))
async def _on_message(self, update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
"""Handle incoming messages (text, photos, voice, documents)."""
if not update.message or not update.effective_user:
return
message = update.message
user = update.effective_user
chat_id = message.chat_id
sender_id = self._sender_id(user)
self._remember_thread_context(message)
# Store chat_id for replies
self._chat_ids[sender_id] = chat_id
if not await self._is_group_message_for_bot(message):
return
# Build content from text and/or media
content_parts = []
media_paths = []
# Text content
if message.text:
content_parts.append(message.text)
if message.caption:
content_parts.append(message.caption)
# Download current message media
current_media_paths, current_media_parts = await self._download_message_media(
message, add_failure_content=True
)
media_paths.extend(current_media_paths)
content_parts.extend(current_media_parts)
if current_media_paths:
logger.debug("Downloaded message media to {}", current_media_paths[0])
# Reply context: text and/or media from the replied-to message
reply = getattr(message, "reply_to_message", None)
if reply is not None:
reply_ctx = self._extract_reply_context(message)
reply_media, reply_media_parts = await self._download_message_media(reply)
if reply_media:
media_paths = reply_media + media_paths
logger.debug("Attached replied-to media: {}", reply_media[0])
tag = reply_ctx or (
f"[Reply to: {reply_media_parts[0]}]" if reply_media_parts else None
)
if tag:
content_parts.insert(0, tag)
content = "\n".join(content_parts) if content_parts else "[empty message]"
logger.debug("Telegram message from {}: {}...", sender_id, content[:50])
str_chat_id = str(chat_id)
metadata = self._build_message_metadata(message, user)
session_key = self._derive_topic_session_key(message)
# Telegram media groups: buffer briefly, forward as one aggregated turn.
if media_group_id := getattr(message, "media_group_id", None):
key = f"{str_chat_id}:{media_group_id}"
if key not in self._media_group_buffers:
self._media_group_buffers[key] = {
"sender_id": sender_id,
"chat_id": str_chat_id,
"contents": [],
"media": [],
"metadata": metadata,
"session_key": session_key,
}
self._start_typing(str_chat_id)
buf = self._media_group_buffers[key]
if content and content != "[empty message]":
buf["contents"].append(content)
buf["media"].extend(media_paths)
if key not in self._media_group_tasks:
self._media_group_tasks[key] = asyncio.create_task(self._flush_media_group(key))
return
# Start typing indicator before processing
self._start_typing(str_chat_id)
# Forward to the message bus
await self._handle_message(
sender_id=sender_id,
chat_id=str_chat_id,
content=content,
media=media_paths,
metadata=metadata,
session_key=session_key,
)
async def _flush_media_group(self, key: str) -> None:
"""Wait briefly, then forward buffered media-group as one turn."""
try:
await asyncio.sleep(0.6)
if not (buf := self._media_group_buffers.pop(key, None)):
return
content = "\n".join(buf["contents"]) or "[empty message]"
await self._handle_message(
sender_id=buf["sender_id"],
chat_id=buf["chat_id"],
content=content,
media=list(dict.fromkeys(buf["media"])),
metadata=buf["metadata"],
session_key=buf.get("session_key"),
)
finally:
self._media_group_tasks.pop(key, None)
def _start_typing(self, chat_id: str) -> None:
"""Start sending 'typing...' indicator for a chat."""
# Cancel any existing typing task for this chat
self._stop_typing(chat_id)
self._typing_tasks[chat_id] = asyncio.create_task(self._typing_loop(chat_id))
def _stop_typing(self, chat_id: str) -> None:
"""Stop the typing indicator for a chat."""
task = self._typing_tasks.pop(chat_id, None)
if task and not task.done():
task.cancel()
async def _typing_loop(self, chat_id: str) -> None:
"""Repeatedly send 'typing' action until cancelled."""
try:
while self._app:
await self._app.bot.send_chat_action(chat_id=int(chat_id), action="typing")
await asyncio.sleep(4)
except asyncio.CancelledError:
pass
except Exception as e:
logger.debug("Typing indicator stopped for {}: {}", chat_id, e)
async def _on_error(self, update: object, context: ContextTypes.DEFAULT_TYPE) -> None:
"""Log polling / handler errors instead of silently swallowing them."""
logger.error("Telegram error: {}", context.error)
def _get_extension(
self,
media_type: str,
mime_type: str | None,
filename: str | None = None,
) -> str:
"""Get file extension based on media type or original filename."""
if mime_type:
ext_map = {
"image/jpeg": ".jpg",
"image/png": ".png",
"image/gif": ".gif",
"audio/ogg": ".ogg",
"audio/mpeg": ".mp3",
"audio/mp4": ".m4a",
}
if mime_type in ext_map:
return ext_map[mime_type]
type_map = {"image": ".jpg", "voice": ".ogg", "audio": ".mp3", "file": ""}
if ext := type_map.get(media_type, ""):
return ext
if filename:
from pathlib import Path
return "".join(Path(filename).suffixes)
return ""