675 lines
25 KiB
Python
675 lines
25 KiB
Python
"""Telegram channel implementation using python-telegram-bot."""
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from __future__ import annotations
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import asyncio
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import re
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import time
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import unicodedata
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from loguru import logger
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from telegram import BotCommand, ReplyParameters, Update
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from telegram.ext import Application, CommandHandler, ContextTypes, MessageHandler, filters
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from telegram.request import HTTPXRequest
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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 TelegramConfig
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from nanobot.utils.helpers import split_message
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TELEGRAM_MAX_MESSAGE_LEN = 4000 # Telegram message character limit
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def _strip_md(s: str) -> str:
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"""Strip markdown inline formatting from text."""
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s = re.sub(r'\*\*(.+?)\*\*', r'\1', s)
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s = re.sub(r'__(.+?)__', r'\1', s)
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s = re.sub(r'~~(.+?)~~', r'\1', s)
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s = re.sub(r'`([^`]+)`', r'\1', s)
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return s.strip()
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def _render_table_box(table_lines: list[str]) -> str:
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"""Convert markdown pipe-table to compact aligned text for <pre> display."""
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def dw(s: str) -> int:
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return sum(2 if unicodedata.east_asian_width(c) in ('W', 'F') else 1 for c in s)
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rows: list[list[str]] = []
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has_sep = False
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for line in table_lines:
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cells = [_strip_md(c) for c in line.strip().strip('|').split('|')]
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if all(re.match(r'^:?-+:?$', c) for c in cells if c):
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has_sep = True
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continue
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rows.append(cells)
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if not rows or not has_sep:
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return '\n'.join(table_lines)
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ncols = max(len(r) for r in rows)
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for r in rows:
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r.extend([''] * (ncols - len(r)))
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widths = [max(dw(r[c]) for r in rows) for c in range(ncols)]
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def dr(cells: list[str]) -> str:
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return ' '.join(f'{c}{" " * (w - dw(c))}' for c, w in zip(cells, widths))
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out = [dr(rows[0])]
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out.append(' '.join('─' * w for w in widths))
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for row in rows[1:]:
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out.append(dr(row))
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return '\n'.join(out)
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def _markdown_to_telegram_html(text: str) -> str:
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"""
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Convert markdown to Telegram-safe HTML.
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"""
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if not text:
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return ""
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# 1. Extract and protect code blocks (preserve content from other processing)
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code_blocks: list[str] = []
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def save_code_block(m: re.Match) -> str:
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code_blocks.append(m.group(1))
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return f"\x00CB{len(code_blocks) - 1}\x00"
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text = re.sub(r'```[\w]*\n?([\s\S]*?)```', save_code_block, text)
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# 1.5. Convert markdown tables to box-drawing (reuse code_block placeholders)
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lines = text.split('\n')
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rebuilt: list[str] = []
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li = 0
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while li < len(lines):
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if re.match(r'^\s*\|.+\|', lines[li]):
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tbl: list[str] = []
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while li < len(lines) and re.match(r'^\s*\|.+\|', lines[li]):
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tbl.append(lines[li])
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li += 1
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box = _render_table_box(tbl)
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if box != '\n'.join(tbl):
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code_blocks.append(box)
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rebuilt.append(f"\x00CB{len(code_blocks) - 1}\x00")
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else:
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rebuilt.extend(tbl)
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else:
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rebuilt.append(lines[li])
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li += 1
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text = '\n'.join(rebuilt)
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# 2. Extract and protect inline code
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inline_codes: list[str] = []
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def save_inline_code(m: re.Match) -> str:
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inline_codes.append(m.group(1))
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return f"\x00IC{len(inline_codes) - 1}\x00"
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text = re.sub(r'`([^`]+)`', save_inline_code, text)
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# 3. Headers # Title -> just the title text
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text = re.sub(r'^#{1,6}\s+(.+)$', r'\1', text, flags=re.MULTILINE)
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# 4. Blockquotes > text -> just the text (before HTML escaping)
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text = re.sub(r'^>\s*(.*)$', r'\1', text, flags=re.MULTILINE)
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# 5. Escape HTML special characters
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text = text.replace("&", "&").replace("<", "<").replace(">", ">")
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# 6. Links [text](url) - must be before bold/italic to handle nested cases
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text = re.sub(r'\[([^\]]+)\]\(([^)]+)\)', r'<a href="\2">\1</a>', text)
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# 7. Bold **text** or __text__
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text = re.sub(r'\*\*(.+?)\*\*', r'<b>\1</b>', text)
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text = re.sub(r'__(.+?)__', r'<b>\1</b>', text)
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# 8. Italic _text_ (avoid matching inside words like some_var_name)
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text = re.sub(r'(?<![a-zA-Z0-9])_([^_]+)_(?![a-zA-Z0-9])', r'<i>\1</i>', text)
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# 9. Strikethrough ~~text~~
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text = re.sub(r'~~(.+?)~~', r'<s>\1</s>', text)
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# 10. Bullet lists - item -> • item
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text = re.sub(r'^[-*]\s+', '• ', text, flags=re.MULTILINE)
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# 11. Restore inline code with HTML tags
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for i, code in enumerate(inline_codes):
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# Escape HTML in code content
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escaped = code.replace("&", "&").replace("<", "<").replace(">", ">")
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text = text.replace(f"\x00IC{i}\x00", f"<code>{escaped}</code>")
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# 12. Restore code blocks with HTML tags
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for i, code in enumerate(code_blocks):
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# Escape HTML in code content
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escaped = code.replace("&", "&").replace("<", "<").replace(">", ">")
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text = text.replace(f"\x00CB{i}\x00", f"<pre><code>{escaped}</code></pre>")
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return text
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class TelegramChannel(BaseChannel):
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"""
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Telegram channel using long polling.
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Simple and reliable - no webhook/public IP needed.
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"""
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name = "telegram"
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# Commands registered with Telegram's command menu
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BOT_COMMANDS = [
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BotCommand("start", "Start the bot"),
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BotCommand("new", "Start a new conversation"),
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BotCommand("stop", "Stop the current task"),
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BotCommand("help", "Show available commands"),
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]
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def __init__(
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self,
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config: TelegramConfig,
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bus: MessageBus,
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groq_api_key: str = "",
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):
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super().__init__(config, bus)
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self.config: TelegramConfig = config
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self.groq_api_key = groq_api_key
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self._app: Application | None = None
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self._chat_ids: dict[str, int] = {} # Map sender_id to chat_id for replies
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self._typing_tasks: dict[str, asyncio.Task] = {} # chat_id -> typing loop task
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self._media_group_buffers: dict[str, dict] = {}
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self._media_group_tasks: dict[str, asyncio.Task] = {}
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self._message_threads: dict[tuple[str, int], int] = {}
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def is_allowed(self, sender_id: str) -> bool:
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"""Preserve Telegram's legacy id|username allowlist matching."""
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if super().is_allowed(sender_id):
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return True
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allow_list = getattr(self.config, "allow_from", [])
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if not allow_list or "*" in allow_list:
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return False
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sender_str = str(sender_id)
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if sender_str.count("|") != 1:
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return False
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sid, username = sender_str.split("|", 1)
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if not sid.isdigit() or not username:
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return False
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return sid in allow_list or username in allow_list
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async def start(self) -> None:
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"""Start the Telegram bot with long polling."""
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if not self.config.token:
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logger.error("Telegram bot token not configured")
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return
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self._running = True
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# Build the application with larger connection pool to avoid pool-timeout on long runs
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req = HTTPXRequest(
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connection_pool_size=16,
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pool_timeout=5.0,
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connect_timeout=30.0,
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read_timeout=30.0,
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proxy=self.config.proxy if self.config.proxy else None,
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)
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builder = Application.builder().token(self.config.token).request(req).get_updates_request(req)
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self._app = builder.build()
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self._app.add_error_handler(self._on_error)
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# Add command handlers
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self._app.add_handler(CommandHandler("start", self._on_start))
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self._app.add_handler(CommandHandler("new", self._forward_command))
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self._app.add_handler(CommandHandler("stop", self._forward_command))
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self._app.add_handler(CommandHandler("help", self._on_help))
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# Add message handler for text, photos, voice, documents
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self._app.add_handler(
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MessageHandler(
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(filters.TEXT | filters.PHOTO | filters.VOICE | filters.AUDIO | filters.Document.ALL)
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& ~filters.COMMAND,
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self._on_message
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)
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)
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logger.info("Starting Telegram bot (polling mode)...")
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# Initialize and start polling
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await self._app.initialize()
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await self._app.start()
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# Get bot info and register command menu
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bot_info = await self._app.bot.get_me()
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logger.info("Telegram bot @{} connected", bot_info.username)
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try:
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await self._app.bot.set_my_commands(self.BOT_COMMANDS)
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logger.debug("Telegram bot commands registered")
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except Exception as e:
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logger.warning("Failed to register bot commands: {}", e)
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# Start polling (this runs until stopped)
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await self._app.updater.start_polling(
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allowed_updates=["message"],
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drop_pending_updates=True # Ignore old messages on startup
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)
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# Keep running until stopped
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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 Telegram bot."""
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self._running = False
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# Cancel all typing indicators
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for chat_id in list(self._typing_tasks):
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self._stop_typing(chat_id)
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for task in self._media_group_tasks.values():
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task.cancel()
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self._media_group_tasks.clear()
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self._media_group_buffers.clear()
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if self._app:
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logger.info("Stopping Telegram bot...")
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await self._app.updater.stop()
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await self._app.stop()
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await self._app.shutdown()
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self._app = None
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@staticmethod
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def _get_media_type(path: str) -> str:
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"""Guess media type from file extension."""
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ext = path.rsplit(".", 1)[-1].lower() if "." in path else ""
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if ext in ("jpg", "jpeg", "png", "gif", "webp"):
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return "photo"
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if ext == "ogg":
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return "voice"
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if ext in ("mp3", "m4a", "wav", "aac"):
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return "audio"
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return "document"
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async def send(self, msg: OutboundMessage) -> None:
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"""Send a message through Telegram."""
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if not self._app:
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logger.warning("Telegram bot not running")
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return
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# Only stop typing indicator for final responses
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if not msg.metadata.get("_progress", False):
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self._stop_typing(msg.chat_id)
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try:
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chat_id = int(msg.chat_id)
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except ValueError:
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logger.error("Invalid chat_id: {}", msg.chat_id)
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return
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reply_to_message_id = msg.metadata.get("message_id")
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message_thread_id = msg.metadata.get("message_thread_id")
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if message_thread_id is None and reply_to_message_id is not None:
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message_thread_id = self._message_threads.get((msg.chat_id, reply_to_message_id))
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thread_kwargs = {}
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if message_thread_id is not None:
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thread_kwargs["message_thread_id"] = message_thread_id
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reply_params = None
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if self.config.reply_to_message:
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if reply_to_message_id:
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reply_params = ReplyParameters(
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message_id=reply_to_message_id,
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allow_sending_without_reply=True
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)
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# Send media files
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for media_path in (msg.media or []):
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try:
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media_type = self._get_media_type(media_path)
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sender = {
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"photo": self._app.bot.send_photo,
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"voice": self._app.bot.send_voice,
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"audio": self._app.bot.send_audio,
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}.get(media_type, self._app.bot.send_document)
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param = "photo" if media_type == "photo" else media_type if media_type in ("voice", "audio") else "document"
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with open(media_path, 'rb') as f:
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await sender(
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chat_id=chat_id,
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**{param: f},
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reply_parameters=reply_params,
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**thread_kwargs,
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)
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except Exception as e:
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filename = media_path.rsplit("/", 1)[-1]
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logger.error("Failed to send media {}: {}", media_path, e)
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await self._app.bot.send_message(
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chat_id=chat_id,
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text=f"[Failed to send: {filename}]",
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reply_parameters=reply_params,
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**thread_kwargs,
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)
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# Send text content
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if msg.content and msg.content != "[empty message]":
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is_progress = msg.metadata.get("_progress", False)
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for chunk in split_message(msg.content, TELEGRAM_MAX_MESSAGE_LEN):
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# Final response: simulate streaming via draft, then persist
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if not is_progress:
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await self._send_with_streaming(chat_id, chunk, reply_params, thread_kwargs)
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else:
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await self._send_text(chat_id, chunk, reply_params, thread_kwargs)
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async def _send_text(
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self,
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chat_id: int,
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text: str,
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reply_params=None,
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thread_kwargs: dict | None = None,
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) -> None:
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"""Send a plain text message with HTML fallback."""
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try:
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html = _markdown_to_telegram_html(text)
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await self._app.bot.send_message(
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chat_id=chat_id, text=html, parse_mode="HTML",
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reply_parameters=reply_params,
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**(thread_kwargs or {}),
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)
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except Exception as e:
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logger.warning("HTML parse failed, falling back to plain text: {}", e)
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try:
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await self._app.bot.send_message(
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chat_id=chat_id,
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text=text,
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reply_parameters=reply_params,
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**(thread_kwargs or {}),
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)
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except Exception as e2:
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logger.error("Error sending Telegram message: {}", e2)
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async def _send_with_streaming(
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self,
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chat_id: int,
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text: str,
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reply_params=None,
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thread_kwargs: dict | None = None,
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) -> None:
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"""Simulate streaming via send_message_draft, then persist with send_message."""
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draft_id = int(time.time() * 1000) % (2**31)
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try:
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step = max(len(text) // 8, 40)
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for i in range(step, len(text), step):
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await self._app.bot.send_message_draft(
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chat_id=chat_id, draft_id=draft_id, text=text[:i],
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)
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await asyncio.sleep(0.04)
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await self._app.bot.send_message_draft(
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chat_id=chat_id, draft_id=draft_id, text=text,
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)
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await asyncio.sleep(0.15)
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except Exception:
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pass
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await self._send_text(chat_id, text, reply_params, thread_kwargs)
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async def _on_start(self, update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
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"""Handle /start command."""
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if not update.message or not update.effective_user:
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return
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user = update.effective_user
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await update.message.reply_text(
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f"👋 Hi {user.first_name}! I'm nanobot.\n\n"
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"Send me a message and I'll respond!\n"
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"Type /help to see available commands."
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)
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async def _on_help(self, update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
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"""Handle /help command, bypassing ACL so all users can access it."""
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if not update.message:
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return
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await update.message.reply_text(
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"🐈 nanobot commands:\n"
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"/new — Start a new conversation\n"
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"/stop — Stop the current task\n"
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"/help — Show available commands"
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)
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@staticmethod
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def _sender_id(user) -> str:
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"""Build sender_id with username for allowlist matching."""
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sid = str(user.id)
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return f"{sid}|{user.username}" if user.username else sid
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@staticmethod
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def _derive_topic_session_key(message) -> str | None:
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"""Derive topic-scoped session key for non-private Telegram chats."""
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message_thread_id = getattr(message, "message_thread_id", None)
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if message.chat.type == "private" or message_thread_id is None:
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return None
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return f"telegram:{message.chat_id}:topic:{message_thread_id}"
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@staticmethod
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def _build_message_metadata(message, user) -> dict:
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"""Build common Telegram inbound metadata payload."""
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return {
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"message_id": message.message_id,
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"user_id": user.id,
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"username": user.username,
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"first_name": user.first_name,
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"is_group": message.chat.type != "private",
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"message_thread_id": getattr(message, "message_thread_id", None),
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"is_forum": bool(getattr(message.chat, "is_forum", False)),
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}
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def _remember_thread_context(self, message) -> None:
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"""Cache topic thread id by chat/message id for follow-up replies."""
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message_thread_id = getattr(message, "message_thread_id", None)
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if message_thread_id is None:
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return
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key = (str(message.chat_id), message.message_id)
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self._message_threads[key] = message_thread_id
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if len(self._message_threads) > 1000:
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self._message_threads.pop(next(iter(self._message_threads)))
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async def _forward_command(self, update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
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"""Forward slash commands to the bus for unified handling in AgentLoop."""
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if not update.message or not update.effective_user:
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return
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message = update.message
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user = update.effective_user
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|
self._remember_thread_context(message)
|
|
await self._handle_message(
|
|
sender_id=self._sender_id(user),
|
|
chat_id=str(message.chat_id),
|
|
content=message.text,
|
|
metadata=self._build_message_metadata(message, user),
|
|
session_key=self._derive_topic_session_key(message),
|
|
)
|
|
|
|
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
|
|
|
|
# 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)
|
|
|
|
# Handle media files
|
|
media_file = None
|
|
media_type = None
|
|
|
|
if message.photo:
|
|
media_file = message.photo[-1] # Largest photo
|
|
media_type = "image"
|
|
elif message.voice:
|
|
media_file = message.voice
|
|
media_type = "voice"
|
|
elif message.audio:
|
|
media_file = message.audio
|
|
media_type = "audio"
|
|
elif message.document:
|
|
media_file = message.document
|
|
media_type = "file"
|
|
|
|
# Download media if present
|
|
if media_file and self._app:
|
|
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),
|
|
)
|
|
# Save to workspace/media/
|
|
from pathlib import Path
|
|
media_dir = Path.home() / ".nanobot" / "media"
|
|
media_dir.mkdir(parents=True, exist_ok=True)
|
|
|
|
file_path = media_dir / f"{media_file.file_id[:16]}{ext}"
|
|
await file.download_to_drive(str(file_path))
|
|
|
|
media_paths.append(str(file_path))
|
|
|
|
# Handle voice transcription
|
|
if media_type == "voice" or media_type == "audio":
|
|
from nanobot.providers.transcription import GroqTranscriptionProvider
|
|
transcriber = GroqTranscriptionProvider(api_key=self.groq_api_key)
|
|
transcription = await transcriber.transcribe(file_path)
|
|
if transcription:
|
|
logger.info("Transcribed {}: {}...", media_type, transcription[:50])
|
|
content_parts.append(f"[transcription: {transcription}]")
|
|
else:
|
|
content_parts.append(f"[{media_type}: {file_path}]")
|
|
else:
|
|
content_parts.append(f"[{media_type}: {file_path}]")
|
|
|
|
logger.debug("Downloaded {} to {}", media_type, file_path)
|
|
except Exception as e:
|
|
logger.error("Failed to download media: {}", e)
|
|
content_parts.append(f"[{media_type}: download failed]")
|
|
|
|
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 ""
|