Recording user actions in a browser to create test cases

I'm tasked with finding and/or creating a tool to record user actions as test cases in a web environment in the company I'm currently working at. The web interface of the product is relatively simple and mostly has no dynamic components. The company prefers me using Java and JavaScript to accomplish my task.

I've looked at differing tools like JSFlight and BRAP but it seems like I need to create the tool myself.

I'm thinking of injecting JS code to the web service or adding a proxy in between the connection to log user activity and then reproduce it in Selenium, but I'm open to other suggestions.