mainHandler.py

  - Read input data from user and call the corresponding procedure to execute based on user's action

uploadHandler.py

  - Download the image to the filesystem and rename the photo inlcuding username & time when user select 'upload' option

downloadHander.py

  - Get the requested photo(s) from server and then send it to the requestor based on chat_id

telegram_config.py

  - Configuration file for messages, keyboard format and bot Token key