Add date/description upload to existing open-source Flickr Uploader project

There is an existing, stable open-source project [login to view URL] It does most of what I want quite well, but I need one more feature. Background: This project uploads pictures from a local directory to a Flickr account. It is smart about only uploading pictures that have changed, etc. It is a fine piece of programming. But, I need one more feature. I want to be able to have an auxiliary JSON file for each photo. (E.g. if I had [login to view URL], I might add [login to view URL]). In this .json file, I will have title, description and date info, e.g.: {"title": "Day at the beach", "description": "John and Mary chilling at Dyson Beach", "date_taken": "2004-11-29 16:01:26", "date_taken_granularity": "0" } Tasks: Extend the program to do the following: - When a picture is uploaded, look for a corresponding .json file. If it is found, call the Flickr APIs [login to view URL] and/or [login to view URL] with the data in the json file. - If the .json file is created or changed, even if the picture itself has not changed, also call these APIs, to update the data on Flickr.