Support stock tracking and restocking

[Steffo99]

Via email:

Hello Stefano Pigozzi,

I am a university student and I am working on a project on a chatbot. I am using the telegram shop bot uploaded on your GitHub repository, with the link (https://github.com/Steffo99/greed). You said in the documentation and help section that one can add ideas on how to improve the code, so the main reason I’m writing this email is to request that the future of placing a limitation in terms of numbers, to a particular product uploaded by a manager, be added to the shop bot. This should be done on the python code to improve it. Hence, managers can add a new product and also put in the number of such a product, so customers know how many of it is available to them. This would greatly assist in my project.

I wait for your generous reply.

yours faithfully,

Regards,

Jeremiah

[Steffo99]

Thanks for your suggestion! I created an issue based on it: #174 Originally, it was a planned feature, which I didn't manage to implement in time for my finals :) I think some traces of it can still be found around the project's code!