Backend challenge for Creditas Valencia
You have been assigned to prototype a new version of an existing payment stream which is fragile and not scalable, since it requires large modifications whenever a new item is sent or removed.
The new prototype should be able to handle the following scenarios:
- If the payment is for a physical item, you must generate one
shipping labelfor it to be placed in the shipping box; - If payment is a service subscription, you must activate the subscription, and notify the user via email about this;
- If the payment is an ordinary book, you must generate a
shipping labelwith a notification that it is a tax-exempt item. - If payment of any digital media (music, video), in addition to sending the description of the purchase by email to the buyer, grant a discount voucher of 10% to the buyer associated with the payment.
It is not necessary to create the implementations for sending emails, to print the shipping label , etc. For these cases (email, shipping label) only create method calls, to indicate that it would be the place where the sending would take place.
Feel free to modify / refactor the bootstrap file if you feel it is necessary.
Since the proposal does not require a final working code, the use of libraries is allowed to facilitate the implementation.
Please describe your modifications and reasoning in a separate text file or markdown.
What language? Kotlin, Ruby, Python, Java or PHP