howmuch

A tricount like expense-sharing system written in Go

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It is a personal project to learn go and relative technologies.

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Project Diary

2024/09/30

The idea comes from a discussion with my mom. I was thinking about doing some personal budget management thing but she brought up the expense-sharing application that could be a good idea. I explained why it was a terrible idea and had no value but in fact it was a really a good idea.

First I have to set up a web server. I'm thinking about using gin, since I have played with chi in other projects.

Then I have to add some basic support functions like system logging, versioning, and other stuffs.

Next I need to design the API.

• User management: signup, login, logout.
• A logged-in user must be able to:
  • create an event
  • add other users to that event
  • A user can only view their own events, but not the events of other users'
  • A user can add an expense to the event (reason, date, who payed how much, who benefited how much)
  • Users in the event can edit or delete one entry
  • changes are sent to friends in the event
  • User can get the money they spent themselves and the money they must pay to each other
  • User can also get the total amount or the histories.

That is what I thought of for now.

Thus, Besides a web server, I must have a database that can store all the data. ex. PostgreSQL. I need a message queue system (RabbitMQ?) to handle changes for an event. That will results in a messaging service sending emails.

I also want to use Redis for cache management.

What else?

OpenAPI + swagger for API management.

And last but not least, Docker + Kubernetes for the deployment.

That is what I am thinking of for now. I will note down other ideas during the project.