add list links query and display it in the links homepage

.vscode/launch.json

@@ -0,0 +1,36 @@
+{
+   // Use IntelliSense to find out which attributes exist for C# debugging
+   // Use hover for the description of the existing attributes
+   // For further information visit https://github.com/OmniSharp/omnisharp-vscode/blob/master/debugger-launchjson.md
+   "version": "0.2.0",
+   "configurations": [
+        {
+            "name": ".NET Core Launch (web)",
+            "type": "coreclr",
+            "request": "launch",
+            "preLaunchTask": "build",
+            // If you have changed target frameworks, make sure to update the program path.
+            "program": "${workspaceFolder}/Apps/Website/bin/Debug/net5.0/Website.dll",
+            "args": [],
+            "cwd": "${workspaceFolder}/Apps/Website",
+            "stopAtEntry": false,
+            // Enable launching a web browser when ASP.NET Core starts. For more information: https://aka.ms/VSCode-CS-LaunchJson-WebBrowser
+            "serverReadyAction": {
+                "action": "openExternally",
+                "pattern": "\\bNow listening on:\\s+(https?://\\S+)"
+            },
+            "env": {
+                "ASPNETCORE_ENVIRONMENT": "Development"
+            },
+            "sourceFileMap": {
+                "/Views": "${workspaceFolder}/Views"
+            }
+        },
+        {
+            "name": ".NET Core Attach",
+            "type": "coreclr",
+            "request": "attach",
+            "processId": "${command:pickProcess}"
+        }
+    ]
+}

.vscode/tasks.json

@@ -0,0 +1,42 @@
+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "build",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "build",
+                "${workspaceFolder}/Apps/Website/Website.csproj",
+                "/property:GenerateFullPaths=true",
+                "/consoleloggerparameters:NoSummary"
+            ],
+            "problemMatcher": "$msCompile"
+        },
+        {
+            "label": "publish",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "publish",
+                "${workspaceFolder}/Apps/Website/Website.csproj",
+                "/property:GenerateFullPaths=true",
+                "/consoleloggerparameters:NoSummary"
+            ],
+            "problemMatcher": "$msCompile"
+        },
+        {
+            "label": "watch",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "watch",
+                "run",
+                "${workspaceFolder}/Apps/Website/Website.csproj",
+                "/property:GenerateFullPaths=true",
+                "/consoleloggerparameters:NoSummary"
+            ],
+            "problemMatcher": "$msCompile"
+        }
+    ]
+}

Application/Application.csproj

@@ -6,6 +6,7 @@
 
   <ItemGroup>
     <PackageReference Include="MediatR" Version="9.0.0" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="5.0.0" />
   </ItemGroup>
 
   <ItemGroup>

Application/IDbContext.cs

@@ -0,0 +1,13 @@
+using HN.Domain;
+using Microsoft.EntityFrameworkCore;
+
+namespace HN.Application
+{
+  /// <summary>
+  /// Interface permettant l'accès aux DbSet pour toute la partie Query.
+  /// </summary>
+  public interface IDbContext
+  {
+    DbSet<Link> Links { get; }
+  }
+}

Application/ListLinks/LinkDTO.cs

@@ -0,0 +1,11 @@
+using System;
+
+namespace HN.Application
+{
+  public sealed class LinkDTO
+  {
+    public Guid Id { get; set; }
+    public string Url { get; set; }
+    public DateTime CreatedAt { get; set; }
+  }
+}

Application/ListLinks/ListLinksQuery.cs

@@ -0,0 +1,9 @@
+using MediatR;
+
+namespace HN.Application
+{
+  public sealed class ListLinksQuery : IRequest<LinkDTO[]>
+  {
+
+  }
+}

Application/ListLinks/ListLinksQueryHandler.cs

@@ -0,0 +1,30 @@
+using System.Threading;
+using System.Linq;
+using System.Threading.Tasks;
+using MediatR;
+
+namespace HN.Application
+{
+  public sealed class ListLinksQueryHandler : IRequestHandler<ListLinksQuery, LinkDTO[]>
+  {
+    private readonly IDbContext _context;
+
+    public ListLinksQueryHandler(IDbContext context)
+    {
+      _context = context;
+    }
+
+    public Task<LinkDTO[]> Handle(ListLinksQuery request, CancellationToken cancellationToken)
+    {
+      var links = from link in _context.Links
+                  select new LinkDTO
+                  {
+                    Id = link.Id,
+                    Url = link.Url,
+                    CreatedAt = link.CreatedAt
+                  };
+
+      return Task.FromResult(links.ToArray());
+    }
+  }
+}

Apps/Website/Controllers/LinksController.cs

@@ -14,9 +14,9 @@ namespace Website.Controllers
       _bus = bus;
     }
 
-    public IActionResult Index()
+    public async Task<IActionResult> Index()
     {
-      return View();
+      return View(await _bus.Send(new ListLinksQuery()));
     }
 
     public IActionResult Create()

Apps/Website/Startup.cs

@@ -1,3 +1,4 @@
+using HN.Application;
 using HN.Domain;
 using HN.Infrastructure;
 using MediatR;
@@ -23,6 +24,7 @@ namespace Website
     public void ConfigureServices(IServiceCollection services)
     {
       services.AddDbContext<HNDbContext>(options => options.UseSqlite(Configuration.GetConnectionString("Default")));
+      services.AddScoped<IDbContext, HNDbContext>();
       services.AddScoped<ILinkRepository, LinkRepository>();
       services.AddMediatR(typeof(HN.Application.AddLinkCommand));
       services.AddControllersWithViews();

Apps/Website/Views/Links/Index.cshtml

@@ -1,7 +1,14 @@
+@model HN.Application.LinkDTO[]
 @{
   ViewData["Title"] = "Latest Links";
 }
 
 <a asp-action="Create" title="New post">Post a new super duber link</a>
 
-<p>Here are the links</p>
+<p>Here are the links</p>
+<ul>
+  @foreach (var link in Model)
+  {
+    <li>@link.Url created at @link.CreatedAt.ToLocalTime()</li>
+  }
+</ul>

Infrastructure/HNDbContext.cs

@@ -1,9 +1,10 @@
-using HN.Domain;
+using HN.Application;
+using HN.Domain;
 using Microsoft.EntityFrameworkCore;
 
 namespace HN.Infrastructure
 {
-  public sealed class HNDbContext : DbContext
+  public sealed class HNDbContext : DbContext, IDbContext
   {
     public DbSet<Link> Links { get; set; }
 

Infrastructure/Infrastructure.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <ItemGroup>
-    <ProjectReference Include="..\Domain\Domain.csproj" />
+    <ProjectReference Include="..\Application\Application.csproj" />
   </ItemGroup>
 
   <ItemGroup>

hn-dotnet.sln

@@ -7,6 +7,12 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Domain", "Domain\Domain.csp
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Application", "Application\Application.csproj", "{2993DFBE-7A6D-408B-AC94-C8C7B020C685}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Infrastructure", "Infrastructure\Infrastructure.csproj", "{4EBF14D3-A0FF-4F72-92F9-FBEE5474E662}"
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Apps", "Apps", "{7D23D5C3-15B1-407D-9FE1-E30C3FBBA1A4}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Website", "Apps\Website\Website.csproj", "{44842863-BEB0-4718-BBD0-F7640D7AE0D0}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -44,5 +50,32 @@ Global
 		{2993DFBE-7A6D-408B-AC94-C8C7B020C685}.Release|x64.Build.0 = Release|Any CPU
 		{2993DFBE-7A6D-408B-AC94-C8C7B020C685}.Release|x86.ActiveCfg = Release|Any CPU
 		{2993DFBE-7A6D-408B-AC94-C8C7B020C685}.Release|x86.Build.0 = Release|Any CPU
+		{4EBF14D3-A0FF-4F72-92F9-FBEE5474E662}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4EBF14D3-A0FF-4F72-92F9-FBEE5474E662}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{4EBF14D3-A0FF-4F72-92F9-FBEE5474E662}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{4EBF14D3-A0FF-4F72-92F9-FBEE5474E662}.Debug|x64.Build.0 = Debug|Any CPU
+		{4EBF14D3-A0FF-4F72-92F9-FBEE5474E662}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{4EBF14D3-A0FF-4F72-92F9-FBEE5474E662}.Debug|x86.Build.0 = Debug|Any CPU
+		{4EBF14D3-A0FF-4F72-92F9-FBEE5474E662}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{4EBF14D3-A0FF-4F72-92F9-FBEE5474E662}.Release|Any CPU.Build.0 = Release|Any CPU
+		{4EBF14D3-A0FF-4F72-92F9-FBEE5474E662}.Release|x64.ActiveCfg = Release|Any CPU
+		{4EBF14D3-A0FF-4F72-92F9-FBEE5474E662}.Release|x64.Build.0 = Release|Any CPU
+		{4EBF14D3-A0FF-4F72-92F9-FBEE5474E662}.Release|x86.ActiveCfg = Release|Any CPU
+		{4EBF14D3-A0FF-4F72-92F9-FBEE5474E662}.Release|x86.Build.0 = Release|Any CPU
+		{44842863-BEB0-4718-BBD0-F7640D7AE0D0}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{44842863-BEB0-4718-BBD0-F7640D7AE0D0}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{44842863-BEB0-4718-BBD0-F7640D7AE0D0}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{44842863-BEB0-4718-BBD0-F7640D7AE0D0}.Debug|x64.Build.0 = Debug|Any CPU
+		{44842863-BEB0-4718-BBD0-F7640D7AE0D0}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{44842863-BEB0-4718-BBD0-F7640D7AE0D0}.Debug|x86.Build.0 = Debug|Any CPU
+		{44842863-BEB0-4718-BBD0-F7640D7AE0D0}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{44842863-BEB0-4718-BBD0-F7640D7AE0D0}.Release|Any CPU.Build.0 = Release|Any CPU
+		{44842863-BEB0-4718-BBD0-F7640D7AE0D0}.Release|x64.ActiveCfg = Release|Any CPU
+		{44842863-BEB0-4718-BBD0-F7640D7AE0D0}.Release|x64.Build.0 = Release|Any CPU
+		{44842863-BEB0-4718-BBD0-F7640D7AE0D0}.Release|x86.ActiveCfg = Release|Any CPU
+		{44842863-BEB0-4718-BBD0-F7640D7AE0D0}.Release|x86.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(NestedProjects) = preSolution
+		{44842863-BEB0-4718-BBD0-F7640D7AE0D0} = {7D23D5C3-15B1-407D-9FE1-E30C3FBBA1A4}
 	EndGlobalSection
 EndGlobal