WebAPI Developer

Question:

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 between $50 and $100 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.

Solution:

The com.example.retaileroffer have two packages 1. model, 2. controller.

1. Model package have 2 java classes RewardPoints and Transaction. RewardPoint tracks the total and monthly transaction while Transaction tracks the date and amount for each transaction made by the customers.
2. Controller have a PostMapping method that takes in amount and date, calculates RewardPoints and returns it in JSON.

Postmap test:

POST method localhost:8080/reward-points Use: Body, Raw, JSON

Sample input: [ { "amount": 100, "date": "2023-06-15" }, { "amount": 200, "date": "2023-06-25" }, { "amount": 80, "date": "2023-07-15" }, { "amount": 200, "date": "2023-08-05" } ]

Sample output: { "totalPoints": 580, "monthlyPoints": { "06": 300, "07": 30, "08": 250 } }