Athos is a telegram bot that compares prices from diferents stores and notifies the user if the price changes.

• This bot is developed with the idea of being used in a raspberry pi, but it can be deployed in any cloud environment, of course.
• Usually telegram bots are accessible by everyone using the app. This bot is built to be different. The reason is simple: web scrapping is hard and you have to be considerate with the website. If I allow any user to add products to be tracked, it would almost look like I'm DDosing the stores to get the prices.
• For this reason, the bot is meant to be replicated and only be used by a small amount of people. That's why it used an authentication mechanism.

• Python 3.7.
• Pipenv.
• SQLite. (Since I use sqlalchemy you could change the DBMS little work.)
• A Telegram bot API key. (Obtained when you create the bot with botfahter)

• Clone the repository with git clone in the folder you want to install
• If you are using a debian based OS can install it running the install.sh script. Using other OS, install the dependencies mentioned above and run pipenv install.
• Done!

• Create .env file (or add env variable) with a variable called: TELEGRAM_API_KEY. This variable should contains the telegram api key obtained when creating the bot.
• You can (optionally) edit the config files in src/config/constants. The default will check prices every hour (3600 seconds) and wait 1 second between products.
• Add a user with the script src/database_utils/add_user.py. Like this: python ./src/database_utils/add_user.py johndoe s3cr3t_p455w0rd

• Run python ./src/Bot.py
• Done!
• If you want it to launch at system startup follow this Stack overflow answer.

• First, add a user with the method mentioned in the configuration paragraph.
• If you added the user correctly, you can log in in telegram using /start s3cr3t_p455w0rd. You just need to do this once. After that, the bot will save your chat ID and will never ask for password again. After that, please DELETE THE PASSWORD MESSAGE. If you don't, every person that access your telegram app will see the password. Also, avoid common password and don't reuse them
• After that you can add a product with with /add like: /add url productName warningPrice deltaWarning.
  • The url should be the url of the product. Plain and simple.
  • productName is the name you want to product to be identified by.
  • warningPrice is the price you want to be notified if the product reaches that price.
  • deltaWarning is the difference in price you want to be notified by. (If it's 5 the product price should lower 5 or more. Dollars, euros, gbp... whatever.)
• Use /all to get a list of all the products the bot is following.
• Use /delete to delete a product using the internal ID showed with /all. Example: /delete 5ec69e815ac457c387e67291

Right now Athos only supports 1 store:

• https://pccomponentes.com

The list will of course grow in the future :)