MED Processing Orders

Management thinks our branding is so creative that our SaaS customers will pay for Textio merch.

Assignment

Complete the placeOrder function.

It returns a bool indicating whether the order was successful (true is a success) and a float64 representing the user's balance after the order. The placeOrder function should always return the account balance regardless of if it was adjusted or not.

The amountInStock and calcPrice functions can be used to look up the current stock and price of an item.

• If the quantity is greater than the amount in stock, the order should be rejected.

• If the user doesn't have enough money in their account, the order should be rejected.

• Otherwise, the order should be accepted and you should return the new balance.

package main

func placeOrder(productID string, quantity int, accountBalance float64) (bool, float64) {
	total := calcPrice(productID,quantity)
	stock := amountInStock(productID)
	
	if quantity > stock{
		return false, accountBalance
		
	} else if total > accountBalance{
		return false, accountBalance
		
	}else{
		newBalance := accountBalance - total
		return true, newBalance
	}
}

// Don't touch below this line

func calcPrice(productID string, quantity int) float64 {
	return priceList(productID) * float64(quantity)
}

func priceList(productID string) float64 {
	if productID == "1" {
		return 1.50
	} else if productID == "2" {
		return 2.25
	} else if productID == "3" {
		return 3.00
	} else if productID == "4" {
		return 1.00
	} else if productID == "5" {
		return 2.50
	} else if productID == "6" {
		return 8.99
	} else if productID == "7" {
		return 22.50
	} else if productID == "8" {
		return 50.00
	} else if productID == "9" {
		return 999.99
	} else {
		return 0.00
	}
}

func amountInStock(productID string) int {
	if productID == "1" {
		return 11
	} else if productID == "2" {
		return 25
	} else if productID == "3" {
		return 4
	} else if productID == "4" {
		return 6
	} else if productID == "5" {
		return 50
	} else if productID == "6" {
		return 2
	} else if productID == "7" {
		return 0
	} else if productID == "8" {
		return 99
	} else if productID == "9" {
		return 1
	} else {
		return 0
	}
}

Solution

The provided implementation already follows the specified rules:

• Rejects if requested quantity exceeds stock.

• Rejects if total price exceeds account balance.

• Returns the updated balance only when the order is accepted; otherwise returns the original balance.

solution.go

package main

func placeOrder(productID string, quantity int, accountBalance float64) (bool, float64) {
	total := calcPrice(productID, quantity)
	stock := amountInStock(productID)

	if quantity > stock {
		// Not enough stock: reject, return original balance
		return false, accountBalance
	} else if total > accountBalance {
		// Not enough money: reject, return original balance
		return false, accountBalance
	} else {
		// Accept order and return new balance
		newBalance := accountBalance - total
		return true, newBalance
	}
}

// Don't touch below this line

func calcPrice(productID string, quantity int) float64 {
	return priceList(productID) * float64(quantity)
}

func priceList(productID string) float64 {
	if productID == "1" {
		return 1.50
	} else if productID == "2" {
		return 2.25
	} else if productID == "3" {
		return 3.00
	} else if productID == "4" {
		return 1.00
	} else if productID == "5" {
		return 2.50
	} else if productID == "6" {
		return 8.99
	} else if productID == "7" {
		return 22.50
	} else if productID == "8" {
		return 50.00
	} else if productID == "9" {
		return 999.99
	} else {
		return 0.00
	}
}

func amountInStock(productID string) int {
	if productID == "1" {
		return 11
	} else if productID == "2" {
		return 25
	} else if productID == "3" {
		return 4
	} else if productID == "4" {
		return 6
	} else if productID == "5" {
		return 50
	} else if productID == "6" {
		return 2
	} else if productID == "7" {
		return 0
	} else if productID == "8" {
		return 99
	} else if productID == "9" {
		return 1
	} else {
		return 0
	}
}