ExpressJS_2.MD

Practical 13

• For this endeavor, continue with the codebase created in Practical 13 for QuickFresh project.
• Open VS Code inside the project directory.
• Inside the index.js file, perform the following:

1. Create a JSON array called orderList which has the following records:

   [
       { id: 1, product: 'Apples', quantity: 2 },
       { id: 2, product: 'Bananas', quantity: 1 },
       { id: 3, product: 'Milk', quantity: 3 }
   ]

2. Now, for the route "/orders/:orderID", define a handler function such that for every GET request, extracts the orderID as a route parameter and:

   • Returns the order if there is a matching orderID in the orderList with a Status Code 200
   • Otherwise, returns Order Not Found with a Status Code 404

3. Create a JSON array called productList which has the following records:

   [
       { id: 11, name: "Eggs", price: 30, availableQty: 50 },
       { id: 12, name: "Flour", price: 180, availableQty: 3 },
       { id: 14, name: "Butter", price: 70, availableQty: 100 },
       { id: 15, name: "Chocolate", price: 100, availableQty: 20 }
   ]

4. Now, for the route "/products", define a handler function such that for every GET request, it returns:

   • The original product list when the client does not provide any query parameter
   • A filtered product list when the client provides a query parameter called name. Example: name=Duck Eggs
   • A filtered product list when the client provides a query parameter called maxPrice. Example: maxPrice=50
   • A filtered product list when the client provides both the query parameters - name and maxPrice

5. Now create an empty JSON array called shoppingCart

6. Now, for the route "/cart", for every:

   • GET request, it returns the shoppingCart as JSON
   • POST request, it processes the request body as JSON, looks up for the fields id, name, price, qty, and
     • If all the required fields are present, it adds the data to the shopping cart,
     • Otherwise, sends a message "Please provide all the required fields" with a status code 400

Bonus: For each of the routes - "/orders", "/products", "/cart", perform API testing using the Postman OR Thunderclient tool

Attach Screenshots for the same