Professional Scala

OO in Our Chatbot

Now that you know the theoretical basics, let's look at these facilities and how they are used in our program. Let's open Lesson 2/3-project in our IDE and extend our chatbot, which was developed in the previous chapter.

Decoupling Logic and Environment

To do this, we must decouple the environment and logic, and integrate only one in the main method.

Let's open the EffectsProvider class:

Note

For full code, refer to Code Snippets/Lesson 2.scala file.

trait EffectsProvider extends TimeProvider { def input: UserInput def output: UserOutput } object DefaultEffects extends EffectsProvider { override def input: UserInput = ConsoleInput override def output: UserOutput = ConsoleOutput override def currentTime(): LocalTime = LocalTime.now() ...