hablapps/funplay

Utilities for constructing Play controllers from purely functional services

FunPlay: Purely Functional Programming for Play framework

FunPlay is a collection of tools to aid purely functional programming with Play framework.

Current tools include:

• Typesafe action builders
• Purely functional controllers
• Scalaz typeclass instances
• ...

Typesafe action builders

Your service as a function:

type Service[I,O] = I => Future[O]

Then, we want to build a Play controller for it:

val service1: Service[I,O]

val controller1 = Action.async{
  ....
}

Modularise the work: translation back and forth from HTTP request/response to Service I/O. Provide defaults whenever applicable.

Purely functional controllers

Now, we defined our effects and our service is no longer a Future-based service, but a Kleisly.

type Service[F[_], I, O] = I => F[O]

When building our controller, we need more information: the interpreter for F

Scalaz typeclass instances

Some instances for common Scalaz typeclasses.