[telegram] Add start, stop, status, update REST endpoints and /stop command

kibicara/platforms/telegram/bot.py

@@ -3,11 +3,13 @@
 # SPDX-License-Identifier: 0BSD
 
 from aiogram import Bot, Dispatcher, exceptions, types
-from asyncio import gather, sleep
+from asyncio import gather, sleep, CancelledError
 from kibicara.config import config
 from kibicara.platformapi import Censor, Message, Spawner
 from kibicara.platforms.telegram.model import Telegram, TelegramUser
 from logging import getLogger
+from ormantic.exceptions import NoMatch
+from sqlite3 import IntegrityError
 
 
 logger = getLogger(__name__)
@@ -17,15 +19,37 @@ class TelegramBot(Censor):
     def __init__(self, telegram_model):
         super().__init__(telegram_model.hood)
         self.telegram_model = telegram_model
-        self.bot = Bot(token=telegram_model.api_token)
-        self.dp = Dispatcher(self.bot)
-        self.dp.register_message_handler(self._send_welcome, commands=['start'])
-        self.dp.register_message_handler(self._receive_message)
+        try:
+            self.bot = Bot(token=telegram_model.api_token)
+            self.dp = self._create_dispatcher()
+        except exceptions.ValidationError as e:
+            self.telegram_model.enabled = False
+        finally:
+            self.enabled = self.telegram_model.enabled
+
+    def _create_dispatcher(self):
+        dp = Dispatcher(self.bot)
+        dp.register_message_handler(self._send_welcome, commands=['start'])
+        dp.register_message_handler(self._remove_user, commands=['stop'])
+        dp.register_message_handler(self._receive_message)
+        return dp
 
     async def run(self):
-        await gather(self.dp.start_polling(), self.push())
+        try:
+            if not self.dp:
+                self.dp = self._create_dispatcher()
+            logger.debug(f'Bot {self.telegram_model.hood.name} starting.')
+            await gather(self.dp.start_polling(), self._push())
+        except CancelledError:
+            logger.debug(f'Bot {self.telegram_model.hood.name} received Cancellation.')
+            self.dp = None
+            raise
+        except exceptions.ValidationError:
+            logger.debug(f'Bot {self.telegram_model.hood.name} has invalid auth token.')
+        finally:
+            logger.debug(f'Bot {self.telegram_model.hood.name} stopped.')
 
-    async def push(self):
+    async def _push(self):
         while True:
             message = await self.receive()
             logger.debug(
@@ -79,6 +103,16 @@ class TelegramBot(Censor):
         except IntegrityError:
             await message.reply('Error: You are already registered.')
 
+    async def _remove_user(self, message: types.Message):
+        try:
+            telegram_user = await TelegramUser.objects.get(
+                user_id=message.from_user.id, bot=self.telegram_model
+            )
+            await telegram_user.delete()
+            await message.reply('You were removed successfully from this bot.')
+        except NoMatch:
+            await message.reply('Error: You are not subscribed to this bot.')
+
     async def _receive_message(self, message: types.Message):
         if not message.text:
             await message.reply('Error: Only text messages are allowed.')

kibicara/platforms/telegram/model.py

@@ -9,8 +9,9 @@ from ormantic import Boolean, Integer, ForeignKey, Model, Text
 class Telegram(Model):
     id: Integer(primary_key=True) = None
     hood: ForeignKey(Hood)
-    api_token: Text()
+    api_token: Text(unique=True)
     welcome_message: Text()
+    enabled: Boolean() = True
 
     class Mapping(Mapping):
         table_name = 'telegrambots'

kibicara/platforms/telegram/webapi.py

@@ -2,15 +2,17 @@
 #
 # SPDX-License-Identifier: 0BSD
 
+from aiogram.bot.api import check_token
+from aiogram import exceptions
 from fastapi import APIRouter, Depends, HTTPException, Response, status
 from kibicara.config import config
 from kibicara.platforms.telegram.bot import spawner
 from kibicara.platforms.telegram.model import Telegram
 from kibicara.webapi.hoods import get_hood
 from logging import getLogger
-from sqlite3 import IntegrityError
+from sqlite3 import IntegrityError, OperationalError
 from ormantic.exceptions import NoMatch
-from pydantic import BaseModel
+from pydantic import BaseModel, validator
 
 
 logger = getLogger(__name__)
@@ -20,6 +22,14 @@ class BodyTelegram(BaseModel):
     api_token: str
     welcome_message: str = 'Welcome!'
 
+    @validator('api_token')
+    def valid_api_token(cls, value):
+        try:
+            check_token(value)
+            return value
+        except exceptions.ValidationError as e:
+            raise ValueError(e)
+
 
 async def get_telegram(telegram_id: int, hood=Depends(get_hood)):
     try:
@@ -49,7 +59,9 @@ async def telegram_delete(telegram=Depends(get_telegram)):
 
 
 @router.post('/', status_code=status.HTTP_201_CREATED)
-async def telegram_create(values: BodyTelegram, hood=Depends(get_hood)):
+async def telegram_create(
+    response: Response, values: BodyTelegram, hood=Depends(get_hood)
+):
     try:
         telegram = await Telegram.objects.create(hood=hood, **values.__dict__)
         spawner.start(telegram)
@@ -57,3 +69,33 @@ async def telegram_create(values: BodyTelegram, hood=Depends(get_hood)):
         return telegram
     except IntegrityError:
         raise HTTPException(status_code=status.HTTP_409_CONFLICT)
+
+
+@router.put('/{telegram_id}', status_code=status.HTTP_202_ACCEPTED)
+async def telegram_update(values: BodyTelegram, telegram=Depends(get_telegram)):
+    try:
+        spawner.stop(telegram)
+        await telegram.update(**values.__dict__)
+        spawner.start(telegram)
+        return telegram
+    except IntegrityError:
+        raise HTTPException(status_code=status.HTTP_409_CONFLICT)
+
+
+@router.get('/{telegram_id}/status', status_code=status.HTTP_200_OK)
+async def telegram_status(telegram=Depends(get_telegram)):
+    return {'status': spawner.get(telegram).status.name}
+
+
+@router.post('/{telegram_id}/start', status_code=status.HTTP_200_OK)
+async def telegram_start(telegram=Depends(get_telegram)):
+    await telegram.update(enabled=True)
+    spawner.get(telegram).start()
+    return {}
+
+
+@router.post('/{telegram_id}/stop', status_code=status.HTTP_200_OK)
+async def telegram_stop(telegram=Depends(get_telegram)):
+    await telegram.update(enabled=False)
+    spawner.get(telegram).stop()
+    return {}