telegram-chat-cleaner

clean-telegram-chat.sh

# create a telegram application at https://my.telegram.org/apps

TELEGRAM_CHAT_NAME="" \
TELEGRAM_CLEAN_DELTA_DAYS="" \
TELEGRAM_API_ID="" \
TELEGRAM_API_NAME="" \
TELEGRAM_API_HASH="" \
python3 telegram-chat-cleaner.py

crontab

# runs every hour
0 * * * * clean-telegram-chat.sh

requirements.txt

telethon
pytz

telegram-chat-cleaner.py

#!/usr/bin/env python3
# fork from https://github.com/loicpirez/DeleteEveryTelegramMessage

import os
import datetime

import pytz
from telethon import TelegramClient, events, sync
from telethon import utils
from telethon.utils import get_display_name
from telethon.tl.functions.messages import DeleteMessagesRequest

utc=pytz.UTC
today = datetime.datetime.today()
delta_days = int(os.environ.get('TELEGRAM_CLEAN_DELTA_DAYS'))
delta = today - datetime.timedelta(days=delta_days)
delta = utc.localize(delta)

chat_name = os.environ.get('TELEGRAM_CHAT_NAME')
api_id = int(os.environ.get('TELEGRAM_API_ID'))
api_hash = os.environ.get('TELEGRAM_API_HASH')
client = TelegramClient(os.environ.get('TELEGRAM_API_NAME'), api_id, api_hash)
client.start()

for chat in client.get_dialogs(limit=None):
    if chat.name == chat_name:
    #   for message in client.iter_messages(chat.id, limit=None):
    #       if message.date < delta:
    #           print(message.message)
    #           result = client.delete_messages(chat, message.id)
    #           print(result)
        for message in client.iter_messages(chat.id, limit=None, offset_date=delta):
            print(message.message)
            results = client.delete_messages(chat, message.id)
            for result in results:
                print(result)