Separate Abstraction from Implementation with the Bridge Design Pattern

The Bridge design pattern is a useful concept for implementing separation of concerns in your code. It allows you to create a bridge between two different abstraction layers, allowing you to keep your code organized and maintainable.

One of the key advantages of using the Bridge pattern is that it allows you to easily change the implementation of an object without affecting its underlying abstraction. This can be particularly useful when you need to swap out one implementation for another, or when you need to update the implementation of an object without affecting its abstraction.

Let's explore an example of the Bridge pattern in action. The code defines a `Theme` protocol that defines the properties of a theme such as the background color and text color. Two concrete implementations of the Theme protocol are provided: `DarkTheme` and `LightTheme`, which encapsulate the specific details of a dark and light theme, respectively.

The `Style` protocol defines a method applyStyle(to view: UIView, with theme: Theme) that takes a view and a theme and applies the appropriate style to the view. Two concrete implementations of the Style protocol are provided: `ButtonStyle` and `LabelStyle`, which apply the appropriate background color and text color to UIButton and UILabel instances.

The `ViewStyler` class takes a theme and applies a style to a given view using the applyStyle(to:with:) method of the provided style.

Here is an implementation example:

The Bridge design pattern is a powerful tool for creating organized, maintainable, and extensible code. By separating the abstraction and implementation of an object, you can easily change and extend your code without affecting its underlying functionality.