Mediator

DesignPatternGuru/DesignPatternGuru.sln

@@ -37,7 +37,9 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ChainOfResponsibility", "Ch
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Command", "Command\Command.csproj", "{629A51B1-04D9-4636-8E21-1712DCFF21DF}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Iterator", "Iterator\Iterator.csproj", "{6619433E-476B-404C-94A0-D0C0FE52DE41}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Iterator", "Iterator\Iterator.csproj", "{6619433E-476B-404C-94A0-D0C0FE52DE41}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Mediator", "Mediator\Mediator.csproj", "{08D296F6-6698-4FCB-B605-318D9381F975}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -105,6 +107,10 @@ Global
 		{6619433E-476B-404C-94A0-D0C0FE52DE41}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{6619433E-476B-404C-94A0-D0C0FE52DE41}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{6619433E-476B-404C-94A0-D0C0FE52DE41}.Release|Any CPU.Build.0 = Release|Any CPU
+		{08D296F6-6698-4FCB-B605-318D9381F975}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{08D296F6-6698-4FCB-B605-318D9381F975}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{08D296F6-6698-4FCB-B605-318D9381F975}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{08D296F6-6698-4FCB-B605-318D9381F975}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -125,6 +131,7 @@ Global
 		{9626EF73-1F68-46C8-B7C1-434F02768452} = {E3B8A482-1A9A-4B6E-8310-050A44C8E379}
 		{629A51B1-04D9-4636-8E21-1712DCFF21DF} = {E3B8A482-1A9A-4B6E-8310-050A44C8E379}
 		{6619433E-476B-404C-94A0-D0C0FE52DE41} = {E3B8A482-1A9A-4B6E-8310-050A44C8E379}
+		{08D296F6-6698-4FCB-B605-318D9381F975} = {E3B8A482-1A9A-4B6E-8310-050A44C8E379}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {3E5A9C6B-2E8A-466E-B5E0-4379902EFFAC}

DesignPatternGuru/Mediator/Components/BaseComponent.cs

@@ -0,0 +1,24 @@
+using Mediator.Mediators;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Mediator.Components
+{
+    internal class BaseComponent
+    {
+        protected IMediator _mediator;
+
+        public BaseComponent(IMediator mediator = null)
+        {
+            _mediator = mediator;
+        }
+
+        public void SetMediator(IMediator mediator)
+        {
+            _mediator = mediator;
+        }
+    }
+}

DesignPatternGuru/Mediator/Components/Component1.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Mediator.Components
+{
+    internal class Component1 : BaseComponent
+    {
+        public void DoA()
+        {
+            Console.WriteLine("Component1 does A.");
+            _mediator.Notify(this, "A");
+        }
+
+        public void DoB()
+        {
+            Console.WriteLine("Component1 does B.");
+            _mediator.Notify(this, "B");
+        }
+    }
+}

DesignPatternGuru/Mediator/Components/Component2.cs

@@ -0,0 +1,24 @@
+using Mediator.Mediators;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Mediator.Components
+{
+    internal class Component2 : BaseComponent
+    {
+        public void DoC()
+        {
+            Console.WriteLine("Component2 does C.");
+            _mediator.Notify(this, "C");
+        }
+
+        public void DoD()
+        {
+            Console.WriteLine("Component2 does D.");
+            _mediator.Notify(this, "D");
+        }
+    }
+}

DesignPatternGuru/Mediator/Mediator.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

DesignPatternGuru/Mediator/Mediators/ConcreteMediator.cs

@@ -0,0 +1,40 @@
+using Mediator.Components;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Mediator.Mediators
+{
+    internal class ConcreteMediator : IMediator
+    {
+        private Component1 _component1;
+        private Component2 _component2;
+
+        public ConcreteMediator(Component1 component1, Component2 component2)
+        {
+            _component1 = component1;
+            _component2 = component2;
+
+            _component1.SetMediator(this);
+            _component2.SetMediator(this);
+        }
+
+        public void Notify(object sender, string ev)
+        {
+            if (ev == "A")
+            {
+                Console.WriteLine("Mediator reacts on A and triggers following operations: ");
+                _component2.DoC();
+            }
+
+            if (ev == "D") 
+            {
+                Console.WriteLine("Mediator reacts on D and triggers following operations: ");
+                _component1.DoB();
+                _component2.DoC();
+            }
+        }
+    }
+}

DesignPatternGuru/Mediator/Mediators/IMediator.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Mediator.Mediators
+{
+    internal interface IMediator
+    {
+        void Notify(object sender, string ev);
+    }
+}

DesignPatternGuru/Mediator/Program.cs

@@ -0,0 +1,23 @@
+using Mediator.Components;
+using Mediator.Mediators;
+
+namespace Mediator
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            Component1 component1 = new Component1();
+            Component2 component2 = new Component2();
+            new ConcreteMediator(component1, component2);
+
+            Console.WriteLine("Client triggers operation A.");
+            component1.DoA();
+
+            Console.WriteLine();
+
+            Console.WriteLine("Client triggers operation D.");
+            component2.DoD();
+        }
+    }
+}