renamed project to SignalRApp

real-time-app/SignalRApp/Hubs/MessageHub.cs

@@ -0,0 +1,27 @@
+using Microsoft.AspNetCore.SignalR;
+
+namespace SignalRApp.Hubs;
+public class UserMessage
+{
+    public required string Sender { get; set; }
+    public required string Content { get; set; }
+    public DateTime SentTime { get; set; }
+}
+public class MessagingHub : Hub
+{
+    private static readonly List<UserMessage> MessageHistory = new List<UserMessage>();
+    public async Task PostMessage(string content)
+    {
+        var senderId = Context.ConnectionId;
+        var userMessage = new UserMessage
+        {
+            Sender = senderId,
+            Content = content,
+            SentTime = DateTime.UtcNow
+        };
+        MessageHistory.Add(userMessage);
+        await Clients.Others.SendAsync("ReceiveMessage", senderId, content, userMessage.SentTime);
+    }
+    public async Task RetrieveMessageHistory() => 
+        await Clients.Caller.SendAsync("MessageHistory", MessageHistory);
+}

real-time-app/SignalRApp/Program.cs

@@ -0,0 +1,25 @@
+using SignalRApp.Hubs;
+var builder = WebApplication.CreateBuilder(args);
+// Configure CORS
+builder.Services.AddCors(options =>
+{
+    options.AddPolicy("CorsPolicy", policy =>
+    {
+        policy.WithOrigins("http://localhost:3000")
+            .AllowAnyHeader()
+            .AllowAnyMethod()
+            .AllowCredentials();
+    });
+});
+// Add SignalR services
+builder.Services.AddSignalR();
+var app = builder.Build();
+// Use CORS with the specified policy
+app.UseCors("CorsPolicy");
+// Use default files and static files
+app.UseDefaultFiles();
+app.UseStaticFiles();
+// Map the MessagingHub to the "/hub" endpoint
+app.MapHub<MessagingHub>("/hub");
+// Run the application
+app.Run();

real-time-app/SignalRApp/SignalRApp.csproj

@@ -4,7 +4,7 @@
         <TargetFramework>net8.0</TargetFramework>
         <Nullable>enable</Nullable>
         <ImplicitUsings>enable</ImplicitUsings>
-        <RootNamespace>real_time_app</RootNamespace>
+        <RootNamespace>SignalRApp</RootNamespace>
         <DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
     </PropertyGroup>
 

real-time-app/real-time-app.sln

@@ -1,6 +1,6 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "real-time-app", "real-time-app\real-time-app.csproj", "{1E00B034-8D96-4012-9DA0-A7CB3FAA6DA5}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SignalRApp", "SignalRApp\SignalRApp.csproj", "{1E00B034-8D96-4012-9DA0-A7CB3FAA6DA5}"
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{A7453357-B0EC-464E-8CFA-3D2E34977FF6}"
 	ProjectSection(SolutionItems) = preProject

real-time-app/real-time-app/Program.cs

@@ -1,44 +0,0 @@
-var builder = WebApplication.CreateBuilder(args);
-
-// Add services to the container.
-// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
-builder.Services.AddEndpointsApiExplorer();
-builder.Services.AddSwaggerGen();
-
-var app = builder.Build();
-
-// Configure the HTTP request pipeline.
-if (app.Environment.IsDevelopment())
-{
-    app.UseSwagger();
-    app.UseSwaggerUI();
-}
-
-app.UseHttpsRedirection();
-
-var summaries = new[]
-{
-    "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
-};
-
-app.MapGet("/weatherforecast", () =>
-    {
-        var forecast = Enumerable.Range(1, 5).Select(index =>
-                new WeatherForecast
-                (
-                    DateOnly.FromDateTime(DateTime.Now.AddDays(index)),
-                    Random.Shared.Next(-20, 55),
-                    summaries[Random.Shared.Next(summaries.Length)]
-                ))
-            .ToArray();
-        return forecast;
-    })
-    .WithName("GetWeatherForecast")
-    .WithOpenApi();
-
-app.Run();
-
-record WeatherForecast(DateOnly Date, int TemperatureC, string? Summary)
-{
-    public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
-}