add morning facade example to facade

Author: AdelDaniel

structural_design_pattern/facade/README.md

@@ -19,6 +19,7 @@
 - [Definitions](#Definitions)
 - [What Problem Facade Solve](#What-Problem-Facade-Solve)
 - [Examples](#Examples)
+    - [Morning Facade Example](#Morning-Facade-Example)
     - [file converter example ](#file-converter-example)
     - [Shape Maker](#Shape-Maker)  Tutorial point Example 
 - [Sources](#Sources)
@@ -64,6 +65,74 @@
 
 ## **Examples**
 
+### Morning Facade Example
+source: GOF  <a href="https://github.com/scottt2/design-patterns-in-dart/tree/master/facade" target="_blank">scottt2 design-patterns-in-dart facade</a>
+
+#### all classes needed to be implemented
+```dart
+class Grinder {
+  String _type;
+
+  Grinder(this._type);
+  void grind() => print("Grinding $_type!");
+}
+
+class Maker {
+  String _type;
+
+  Maker(this._type);
+  void fill() => print("Filling the $_type maker!");
+  void retrieve() => print("Retrieving the $_type!");
+  void start() => print("Starting the $_type maker!");
+}
+
+class Imbiber {
+  String _beverage;
+
+  Imbiber(this._beverage);
+  void drink() => print("Mmmmm...drinking $_beverage!");
+}
+```
+#### facade class 
+```dart
+class MorningFacade {
+  final _coffeeDrinker = Imbiber("coffee");
+  final _coffeeGrinder = Grinder("coffee beans");
+  final _coffeeMaker = Maker("coffee");
+
+  void prepareCoffee() {
+    print("\r\nPreparing the coffee...");
+    _coffeeGrinder.grind();
+    _coffeeMaker
+      ..fill()
+      ..start();
+    print("Coffee is brewing!\r\n");
+  }
+
+  void drinkCoffee() {
+    print("\r\nMust...have...coffee...");
+    _coffeeMaker.retrieve();
+    _coffeeDrinker.drink();
+    print("This is damn fine coffee!");
+  }
+}
+```
+#### main() to test
+```dart
+void main() {
+  var typicalMorning = MorningFacade();
+
+  print("Wake up! Grab a brush and put on a little makeup...");
+  print("\r\nStumble to the kitchen...");
+
+  typicalMorning.prepareCoffee();
+  print("Oh my...that smells good...");
+
+  typicalMorning.drinkCoffee();
+  print("\r\nI'm ready to attack the day!");
+}
+
+```
 ### file converter example 
  - Example in dart: <a href="file_converter/" target="_blank">file converter example </a>
 

structural_design_pattern/facade/morning_facade_example.dart

@@ -0,0 +1,58 @@
+// Morning Facade Example
+class Grinder {
+  String _type;
+
+  Grinder(this._type);
+  void grind() => print("Grinding $_type!");
+}
+
+class Maker {
+  String _type;
+
+  Maker(this._type);
+  void fill() => print("Filling the $_type maker!");
+  void retrieve() => print("Retrieving the $_type!");
+  void start() => print("Starting the $_type maker!");
+}
+
+class Imbiber {
+  String _beverage;
+
+  Imbiber(this._beverage);
+  void drink() => print("Mmmmm...drinking $_beverage!");
+}
+
+class MorningFacade {
+  final _coffeeDrinker = Imbiber("coffee");
+  final _coffeeGrinder = Grinder("coffee beans");
+  final _coffeeMaker = Maker("coffee");
+
+  void prepareCoffee() {
+    print("\r\nPreparing the coffee...");
+    _coffeeGrinder.grind();
+    _coffeeMaker
+      ..fill()
+      ..start();
+    print("Coffee is brewing!\r\n");
+  }
+
+  void drinkCoffee() {
+    print("\r\nMust...have...coffee...");
+    _coffeeMaker.retrieve();
+    _coffeeDrinker.drink();
+    print("This is damn fine coffee!");
+  }
+}
+
+void main() {
+  var typicalMorning = MorningFacade();
+
+  print("Wake up! Grab a brush and put on a little makeup...");
+  print("\r\nStumble to the kitchen...");
+
+  typicalMorning.prepareCoffee();
+  print("Oh my...that smells good...");
+
+  typicalMorning.drinkCoffee();
+  print("\r\nI'm ready to attack the day!");
+}