Reward points calculator program is a simple app calculating bonus points for customers for their transactions made.

Assignment instructions: A retailer offers a rewards program to its customers, awarding points based on each recorded purchase.

A customer receives 2 points for every dollar spent over $100 in each transaction, plus 1 point for every dollar spent over $50 in each transaction (e.g. a $120 purchase = 2x$20 + 1x$50 = 90 points).

Given a record of every transaction during a three-month period, calculate the reward points earned for each customer per month and total.

a bit of explanation

• I have on purpose used custom-made validation instead of build-in Spring/Hibernate @Valid and BindingResult option
• package names are simplified instead of going full DDD/feature naming or going different modules for each section, but it should be easy to divide them if needed
• there are unit tests and e2e / controller tests in test packages
• you can access H2 console on http://localhost:8080/h2
• Swagger/OpenAPI can be accessed by URL: http://localhost:8080/swagger-ui.html
  • there are 2 customers with ID 1 and 2 to browse transactions and calculate rewards points
  • there are several transactions with IDs starting from 1 to 10

to run the app

• make sure you have both maven and java 11+ installed and configured
• run mvn clean install in the terminal (or use Intellij to do it) to build jar file
• run mvn spring-boot:run to run the app in the embedded tomcat server (or use Intellij to do it)