Dependency Inversion Principle

Emne 3/DependencyInversionPrinciple/DependencyInversionPrinciple.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DependencyInversionPrinciple", "DependencyInversionPrinciple\DependencyInversionPrinciple.csproj", "{D42BF79A-EB9A-4B1E-A7A8-E0C83D3CD844}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{D42BF79A-EB9A-4B1E-A7A8-E0C83D3CD844}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{D42BF79A-EB9A-4B1E-A7A8-E0C83D3CD844}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{D42BF79A-EB9A-4B1E-A7A8-E0C83D3CD844}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{D42BF79A-EB9A-4B1E-A7A8-E0C83D3CD844}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+EndGlobal

Emne 3/DependencyInversionPrinciple/DependencyInversionPrinciple/ChatClient.cs

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+namespace DependencyInversionPrinciple;
+
+public class ChatClient
+{
+    private readonly string _name;
+    private readonly ChatServer _server;
+
+    public ChatClient(string name, ChatServer server)
+    {
+        _name = name;
+        _server = server;
+        _server.Register(this);
+    }
+
+    public void Say(string message)
+    {
+        _server.Broadcast(this, $"{_name} sier: {message}");
+    }
+
+    public void Receive(string message)
+    {
+        Console.WriteLine($"{_name} mottok: {message}");
+    }
+}

Emne 3/DependencyInversionPrinciple/DependencyInversionPrinciple/ChatServer.cs

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+namespace DependencyInversionPrinciple;
+
+public class ChatServer
+{
+  private readonly List<ChatClient> _clients;
+
+  public ChatServer()
+  {
+    _clients = new List<ChatClient>();
+  }
+
+  public void Broadcast(ChatClient client, string message)
+  {
+    foreach (var chatClient in _clients)
+    {
+      if (chatClient != client)
+      {
+        chatClient.Receive(message);
+      }
+      
+    }
+  }
+
+  public void Register(ChatClient client)
+  {
+    _clients.Add(client);
+  }
+}

Emne 3/DependencyInversionPrinciple/DependencyInversionPrinciple/DependencyInversionPrinciple.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>net8.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+</Project>

Emne 3/DependencyInversionPrinciple/DependencyInversionPrinciple/Program.cs

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+using DependencyInversionPrinciple;
+
+var server = new ChatServer();
+
+var client1 = new ChatClient("Per", server);
+
+client1.Say("Hello");