This application is responsible for reading a file with json lines from stdin, representing account transaction commands, processing them, and printing the partial status of the account.

Usage

Running for the example file

To run the application, one can have Docker installed and type

docker build -t authorizer . 

And then

docker run -p 3000:3000 authorizer

This will run the operations file located in the json folder.

Running with a different file

To run a different commands file, one can copy it to the json folder, remembering to rename it to operations or changing the name in the Dockerfile and then re-running the above docker commands.

Another option is to copy the file to the json folder, re-running only the docker build and running docker run as follows:

docker run -p 3000:3000 -it authorizer /bin/bash 

Once inside the docker container, one can type

Run tests

Inside docker container, run:

Project Structure

This project was developed in Clojure. The structure is basically separated in 3 namespaces:

• core: contains the main project login, as well as account structure creation and altering
• rules: contains the business logic, aka transaction authorization/denial rules
• utils: contains utilitary functions such as json handling and printing functions

Project Decisions

• It is assumed that the first line of every json file is an account initialization command
• It is assumed that for each command the violations printed are specific of that command, i.e. violations are not printed in a cumulative way.