Awesome

opening-hours-kata

Amy and Valerie, the shop owners, need you to develop a simple program that satisfies the following requirements:

The opening days and hours of the shop need to be configurable, and can be scattered in the week (e.g. Mon, Wed, Fri from 08:00 to 16:00)
Amy needs to display the date of the next opening on a billboard outside of the shop
Amy also wants to display on the website of the shop whether it is opened or closed at the moment

Write a small module that follows this contract, so that Valerie can easily integrate it:

OpeningHours.isOpenOn(date)
OpeningHours.nextOpeningDate(date)

test cases

You can use the following test cases to get started:

Shop opening days: Mon, Wed, Fri
Shop opening hours: 08:00 - 16:00

wednesday = '2016-05-11T12:22:11.824Z'
thursday = '2016-05-12T12:22:11.824Z'
fridayMorning = '2016-05-13T08:00:00.000Z'

OpeningHours.isOpenOn(wednesday) == true
OpeningHours.isOpenOn(thursday) == false

OpeningHours.nextOpeningDate(wednesday) === fridayMorning

Choose whatever language you like. (PS: Valerie likes Haskell and Elixir).

don't be shy

If you want to share what you came up with, don't hesitate to open an issue with a link to your repository. I will link it here and we both will live a long and happy life.

Submitted solutions: