johnnystefan/pattern-facade

Skill: Implement Facade Pattern

Purpose

Provides a simplified interface to a complex library, framework, or any other set of classes.

Procedural Instructions

1. Identify Complexity: Locate a subsystem that is hard to use or has too many dependencies.
2. Define Facade Class: Create a class that provides simple methods for the most common tasks.
3. Delegate Work: The facade should initialize and manage subsystem objects, directing client calls to them.

TypeScript Example

class ComplexSubsystem {
  initialize() {}
  process() {}
  getResults() {
    return 'Data';
  }
}

class Facade {
  private subsystem = new ComplexSubsystem();

  public simpleOperation(): string {
    this.subsystem.initialize();
    this.subsystem.process();
    return this.subsystem.getResults();
  }
}

Payoff

• Decoupling: Protects clients from changes in the complex subsystem.
• Ease of Use: Provides a shortcut to frequently used features.