Add FanExample

src/StatePattern/FanExample/FanMotivationalExample.cs

@@ -0,0 +1,75 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace StatePattern.FanExample
+{
+    public class FanMotivationalExample
+    {   
+        public static void Run()
+        {
+            FanMotivationalContext fanContext = new FanMotivationalContext();
+
+            fanContext.PullChain();
+
+            fanContext.PullChain();
+
+            fanContext.PullChain();
+
+            fanContext.PullChain();
+
+            fanContext.PullChain();
+
+            fanContext.PullChain();
+
+            fanContext.PullChain();
+
+        }
+    }
+
+    public class FanMotivationalContext
+    {
+        private const int OFF = 0;
+
+        private const int S1 = 1;
+
+        private const int S2 = 2;
+
+        private const int S3 = 3;
+
+        private const int S4 = 4;
+
+        int state = OFF;
+
+        public void PullChain()
+        {
+            if(state == OFF)
+            {
+                Console.WriteLine("Turning TV to speed 1");
+                state = S1;
+            }
+            else if(state == S1)
+            {
+                Console.WriteLine("Turning TV to speed 2");
+                state = S2;
+            }
+            else if (state == S2)
+            {
+                Console.WriteLine("Turning TV to speed 3");
+                state = S3;
+            }
+            else if (state == S3)
+            {
+                Console.WriteLine("Turning TV to speed 4");
+                state = S4;
+            }
+            else if (state == S4)
+            {
+                Console.WriteLine("Turning TV OFF");
+                state = OFF;
+            }
+        }
+
+    }
+}

src/StatePattern/FanExample/FanWithStatePatternExample.cs

@@ -0,0 +1,165 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace StatePattern.FanExample
+{
+    public class FanWithStatePatternExample
+    {
+        public static void Run()
+        {
+            FanMotivationalContext fanContext = new FanMotivationalContext();
+
+            fanContext.PullChain();
+
+            fanContext.PullChain();
+
+            fanContext.PullChain();
+
+            fanContext.PullChain();
+
+            fanContext.PullChain();
+
+            fanContext.PullChain();
+
+            fanContext.PullChain();
+        }
+    }
+
+    /// <summary>
+    /// Context
+    /// </summary>
+    public class FanContext
+    {
+        public IFanState OFF { get; private set; }
+
+        public IFanState S1 { get; private set; }
+
+        public IFanState S2 { get; private set; }
+
+        public IFanState S3 { get; private set; }
+
+        public IFanState S4 { get; private set; }
+
+        public IFanState State { get; set; }
+
+        public FanContext()
+        {
+            OFF = new FanOffState(this);
+
+            S1 = new FanS1State(this);
+
+            S2 = new FanS2State(this);
+
+            S3 = new FanS3State(this);
+
+            S4 = new FanS4State(this);
+
+            State = OFF;
+        }   
+
+        public void PullChain()
+        {
+            State.PullChain();
+        }
+    }      
+
+    /// <summary>
+    /// State interface
+    /// </summary>
+    public interface IFanState
+    {
+        void PullChain();
+    }
+
+    public class FanOffState : IFanState
+    {
+        FanContext context;
+        public FanOffState(FanContext context)
+        {
+            this.context = context;
+        }
+        public void PullChain()
+        {
+            Console.WriteLine("Turning TV to speed 1");
+            context.State = context.S1;
+        }
+    }
+
+    /// <summary>
+    /// State concrete implementation
+    /// </summary>
+    public class FanS1State : IFanState
+    {
+        private FanContext fanContext;
+
+        public FanS1State(FanContext fanContext)
+        {
+            this.fanContext = fanContext;
+        }
+
+        public void PullChain()
+        {
+            Console.WriteLine("Turning TV to speed 2");
+            fanContext.State = fanContext.S2;
+        }
+    }
+
+    /// <summary>
+    /// State concrete implementation
+    /// </summary>
+    public class FanS2State : IFanState
+    {
+        private FanContext fanContext;
+
+        public FanS2State(FanContext fanContext)
+        {
+            this.fanContext = fanContext;
+        }
+
+        public void PullChain()
+        {
+            Console.WriteLine("Turning TV to speed 3");
+            fanContext.State = fanContext.S3;
+        }
+    }
+
+    /// <summary>
+    /// State concrete implementation
+    /// </summary>
+    public class FanS3State : IFanState
+    {
+        private FanContext fanContext;
+
+        public FanS3State(FanContext fanContext)
+        {
+            this.fanContext = fanContext;
+        }
+
+        public void PullChain()
+        {
+            Console.WriteLine("Turning TV to speed 4");
+            fanContext.State = fanContext.S4;
+        }
+    }
+
+    /// <summary>
+    /// State concrete implementation
+    /// </summary>
+    public class FanS4State : IFanState
+    {
+        private FanContext fanContext;
+
+        public FanS4State(FanContext fanContext)
+        {
+            this.fanContext = fanContext;
+        }
+
+        public void PullChain()
+        {
+            Console.WriteLine("Turning TV OFF");
+            fanContext.State = fanContext.OFF;
+        }
+    }
+}

src/StatePattern/StatePatternExamples.cs

@@ -1,4 +1,5 @@
-using StatePattern.TVExample;
+using StatePattern.FanExample;
+using StatePattern.TVExample;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -15,6 +16,14 @@ namespace StatePattern
             GoToNextStep();
 
             TVExampleRunner.Run();
+
+            GoToNextStep();
+
+            FanMotivationalExample.Run();
+
+            GoToNextStep();
+
+            FanWithStatePatternExample.Run();
         }
 
         private static void GoToNextStep()