If you would like to learn to code Ruby extensions, you can start here …
This topic thread and it’s example is written the way it is by design. It serves it’s purpose, as stated in the topic title.
Feel free to use it as a starting point. Modify it for your own use. (But I will not be modifying this example here in this topic thread.)
However, it uses operations and observers which are advanced API concepts. It will will take quite some time for a new coder to become familiar and confident in event-driven coding to use these concepts.
We ask here in this forum category that coders at least try to solve their own problems, and ask specific coding questions. It is not appropriate to ask others here in this category to do your work for you.
If you do not have the time or inclination to learn Ruby programming, then you can hire an experienced coder to do it for you. Please post such a request in the Commercial category: