Handle HTTP request to add a new review

[EmadAghaei]

A user may write a review of an item, generating an HTTP request to add a new review for the item. The handler should look up the item based on the item id, add the review to the list of reviews, and persist the update item to the database. If the item cannot be found, a meaningful response should be returned with a description. The handler interacts with a persistence library to store the data. The handler should also check the validity of the input arguments. If any of the input arguments are empty or null, a 400 response should be returned with a description.

Important notes: The endpoint address is "/reviewAnItem". The URL query parameters are: "userId" , "itemId","comment", and "rating".

[EmadAghaei]

In order to validate the input we need to make some assumptions:

• max comment length: 254 characters
• rating range: 1- 10
  Let me know, if these need to be adjusted

[EmadAghaei]

For compatibility with REST API documentation, the review parameters should be passed via POST request instead of GET.