Telegram Group Defender Bot. A simple bot that disable sending media messages at 22:00(+08:00) and enable sending media messages at 08:00(+08:00).

group_defender_bot.py

import logging
from telegram import Update, ChatPermissions
from telegram.ext import ApplicationBuilder, ContextTypes, CommandHandler
from datetime import time

logging.basicConfig(
    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
    level=logging.INFO
)

async def sleep_callback(context: ContextTypes.DEFAULT_TYPE):
    chat_id = context.job.chat_id
    permissions = ChatPermissions(can_send_messages=True)
    await context.bot.set_chat_permissions(chat_id=chat_id, permissions=permissions)
    await context.bot.send_message(chat_id=chat_id, text='睡眠模式已开启')

async def awake_callback(context: ContextTypes.DEFAULT_TYPE):
    chat_id = context.job.chat_id
    permissions = ChatPermissions(
        can_send_messages=True,
        can_send_media_messages=True,
        can_send_polls=True,
        can_send_other_messages=True,
        can_add_web_page_previews=True,
        can_change_info=True,
        can_invite_users=True,
        can_pin_messages=True
    )
    await context.bot.set_chat_permissions(chat_id=chat_id, permissions=permissions)
    await context.bot.send_message(chat_id=chat_id, text='睡眠模式已关闭')

async def start(update: Update, context: ContextTypes.DEFAULT_TYPE):
    await update.message.reply_text("Add Bot To Group, give it admin permission and use send /sleepmode in group to finish setup. ")

def remove_job_if_exists(name: str, context: ContextTypes.DEFAULT_TYPE) -> bool:
    current_jobs = context.job_queue.get_jobs_by_name(name)
    if not current_jobs:
        return False
    for job in current_jobs:
        job.schedule_removal()
    return True

async def sleepmode(update: Update, context: ContextTypes.DEFAULT_TYPE):
    chat_id = update.effective_message.chat_id
    
    # setup wakeup task
    wakeup_name = str(chat_id) + "_wakeup"
    wakeup_timestr = '08:00:00+08:00'
    remove_job_if_exists(wakeup_name, context)
    context.job_queue.run_daily(awake_callback, time=time.fromisoformat(wakeup_timestr), chat_id=chat_id, name=wakeup_name)
    
    # setup sleep task
    sleep_name = str(chat_id) + "_sleep"
    sleep_timestr = '22:00:00+08:00'
    remove_job_if_exists(sleep_name, context)
    context.job_queue.run_daily(sleep_callback, time=time.fromisoformat(sleep_timestr), chat_id = chat_id, name=sleep_name)
    await update.message.reply_text("睡眠模式开始时间: " + sleep_timestr + ", 睡眠模式关闭时间：" + wakeup_timestr)

if __name__ == '__main__':
    application = ApplicationBuilder().token('YOUR_BOT_TOKEN').build()
    application.add_handler(CommandHandler('start', start))
    application.add_handler(CommandHandler('sleepmode', sleepmode))
    application.run_polling()

1. create your bot with @BotFather and replace YOUR_BOT_TOKEN with your bot token get from BotFather
2. see how to host your bot
3. add bot to your group and give it admin permissions
4. send /sleepmode in your group to enable sleepmode