def save(self, refresh_meta=True, **kwargs):
if refresh_meta:
# bot = bot or get_bot()
chat = bot.get_chat(chat_id=self.chat_id)
self.identifier = chat.id
self.username = chat.username
self.title = chat.title
super(Channel, self).save(**kwargs)
def clean(self):
# no either id or username should be specified
if not self.identifier and not self.username:
raise ValidationError(
"Identifier or username should be provided for channel.")
# no access to channel
try:
bot.get_chat(chat_id=self.chat_id)
admins = bot.get_chat_administrators(chat_id=self.chat_id)
for admin in admins:
if admin.user.username == bot.username:
if not admin.can_post_messages:
raise ValidationError("Bot can't post messages.")
break
else:
raise ValidationError("Bot is not admin.")
except TelegramError:
raise ValidationError("Bot doesn't have access to this channel.")
def refresh_channels_meta() -> list:
logger.info('Refreshing channels info...')
channels = Channel.objects.all()
stats = []
for channel in channels:
chat = bot.get_chat(chat_id=channel.chat_id)
refreshed = any(
map(
lambda a: a[0] != a[1],
zip([channel.identifier, channel.username, channel.title],
[str(chat.id), chat.username, chat.title])))
if refreshed:
stats.append(channel.title)
channel.save(bot=bot)
logger.info('Done.')
return stats
def save(self, *args, **kwargs):
if self.channel_username:
chat = bot.get_chat(chat_id=self.channel_username)
self.chat_id = chat.id
return super().save(*args, **kwargs)
def _bot_has_access(self):
try:
bot.get_chat(chat_id=self.channel_username)
except TelegramError:
raise ValidationError("Bot doesn't have access to this channel.")