bot.py

import os
import requests
import telegram
from telegram import ParseMode

bot = telegram.Bot(os.environ['BOT_TOKEN']) # Telegram Bot Authorization Token
chat_id = os.environ['CHAT_ID']

def telegram_bot_send_message(bot_message):    
    bot.sendMessage(chat_id, bot_message, parse_mode=ParseMode.HTML)

def notify():
    your_wishlist = get_wishlist(os.environ['STEAM_USER_ID']) # Steam User ID
    games_on_sale = get_games_on_sale(your_wishlist)
    # If there is a game in Wishlist with discount 50% or more, sends game sale info to user
    if len(games_on_sale) > 0:
        games_on_sale_short = shorten_sale_info(games_on_sale)
        title = "<b>The games on your Wishlist are on sale (50% or more):</b> \n"
        bot_message = title + "\n".join(games_on_sale_short)
    else:
        bot_message = "Oops. Sorry, today there is no sale for the games on your wishlist."
    telegram_bot_send_message(bot_message)

# Gets wishlist with Steam API
def get_wishlist(steam_user_id):
    wishlist_endpoint = f"https://store.steampowered.com/wishlist/id/{steam_user_id}/wishlistdata/"
    wishlist = requests.get(wishlist_endpoint).json()
    print("Checking wishlist...")
    return wishlist

# Gets which games are on sale from wishlist
def get_games_on_sale(wishlist):    
    games_on_sale = []
    for appid in wishlist:
        app_details_endpoint = f"https://store.steampowered.com/api/appdetails?appids={appid}"
        app_details = requests.get(app_details_endpoint).json()
        if app_details[appid]['success'] == True:
            app = app_details[appid]['data']
            print(f"Checking {app['name']}...")
            discount_filter(app, games_on_sale)
    return games_on_sale

# Applies a discount filter for each game in wishlist
def discount_filter(game, filtered_games):
    if game['is_free'] == False and 'price_overview' in game:
        discount_percent = game['price_overview']['discount_percent']
        if discount_percent >= 50:
            filtered_games.append(game)

def shorten_sale_info(games_on_sale):
    games_info_short = []
    for count, game in enumerate(games_on_sale, 1):
        name = game['name']
        discount = str(game['price_overview']['discount_percent'])
        price = game['price_overview']['final_formatted']
        games_info_short.append(f"<b>{count})</b> {name} is {discount}% Off! It's now {price}")
    return games_info_short


def main():
    notify()

if __name__ == '__main__':
    main()