Decorator Pattern

Author: Sebastian Boldt

GOFSwift.xcworkspace/xcuserdata/sebastianboldt.xcuserdatad/UserInterfaceState.xcuserstate

@@ -31,9 +31,9 @@ Inspired by: https://github.com/ochococo/Design-Patterns-In-Swift
 ##Structural
 
 * ✅ Bridge
+* ✅ Decorator
 * ❌ Adapter
 * ❌ Composite
-* ❌ Decorator
 * ❌ Facade
 * ❌ Flyweight
 * ❌ Protection Proxy

README.md

@@ -0,0 +1,60 @@
+//: [Previous](@previous)
+
+import Foundation
+
+protocol Pizza {
+    func getIngredients() -> [String]
+    func printIngredients()
+}
+
+extension Pizza {
+    func printIngredients() {
+        for (index,value) in self.getIngredients().enumerated() {
+            print("Ingredient(\(index+1)):\(value)")
+        }
+    }
+}
+
+class BasicPizza : Pizza {
+    func getIngredients() -> [String] {
+        return ["Dough","Tomato-Sauce","Cheese"]
+    }
+}
+
+final class HawaiDecorator : Pizza {
+
+    private var decoratedPizza : Pizza
+    
+    required init (decoratedPizza: Pizza) {
+        self.decoratedPizza = decoratedPizza
+    }
+    
+    func getIngredients() -> [String] {
+        return self.decoratedPizza.getIngredients() + ["Boild Ham","Pineapple"]
+    }
+}
+
+final class CheeseWheelDecorator : Pizza {
+    private var decoratedPizza : Pizza
+    
+    required init (decoratedPizza: Pizza) {
+        self.decoratedPizza = decoratedPizza
+    }
+    
+    func getIngredients() -> [String] {
+        return self.decoratedPizza.getIngredients() + ["More Cheese for the surrounding"]
+    }
+}
+
+
+let basicPizza = BasicPizza()
+let hawaiPizza = HawaiDecorator(decoratedPizza: basicPizza)
+let hawaiWithCheeseWheel = CheeseWheelDecorator(decoratedPizza: hawaiPizza)
+
+hawaiWithCheeseWheel.printIngredients()
+
+
+
+
+
+//: [Next](@next)

Structural.playground/Pages/Decorator.xcplaygroundpage/Contents.swift

@@ -1,2 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
-<playground version='6.0' target-platform='ios'/>
+<playground version='6.0' target-platform='ios'>
+    <pages>
+        <page name='Bridge'/>
+        <page name='Decorator'/>
+    </pages>
+</playground>