add LinkRepository backed by EF Core!

Apps/Website/Startup.cs

@@ -1,4 +1,3 @@
-using System.Threading.Tasks;
 using HN.Domain;
 using HN.Infrastructure;
 using MediatR;
@@ -11,14 +10,6 @@ using Microsoft.Extensions.Hosting;
 
 namespace Website
 {
-  public class LinkRepository : ILinkRepository
-  {
-    public Task AddAsync(Link link)
-    {
-      throw new System.NotImplementedException("link repository not implemented yet");
-    }
-  }
-
   public class Startup
   {
     public Startup(IConfiguration configuration)
@@ -32,9 +23,9 @@ namespace Website
     public void ConfigureServices(IServiceCollection services)
     {
       services.AddDbContext<HNDbContext>(options => options.UseSqlite(Configuration.GetConnectionString("Default")));
-      services.AddSingleton<ILinkRepository, LinkRepository>();
+      services.AddScoped<ILinkRepository, LinkRepository>();
-      services.AddControllersWithViews();
       services.AddMediatR(typeof(HN.Application.AddLinkCommand));
+      services.AddControllersWithViews();
     }
 
     // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.

Infrastructure/LinkRepository.cs

@@ -0,0 +1,17 @@
+using System.Threading.Tasks;
+using HN.Domain;
+
+namespace HN.Infrastructure
+{
+  public sealed class LinkRepository : Repository<Link>, ILinkRepository
+  {
+    public LinkRepository(HNDbContext context) : base(context)
+    {
+    }
+
+    public async Task AddAsync(Link link)
+    {
+      await base.AddAsync(link);
+    }
+  }
+}

Infrastructure/Repository.cs

@@ -0,0 +1,24 @@
+using System.Threading.Tasks;
+using Microsoft.EntityFrameworkCore;
+
+namespace HN.Infrastructure
+{
+  public abstract class Repository<TEntity> where TEntity : class
+  {
+    private readonly HNDbContext _context;
+
+    protected readonly DbSet<TEntity> Entries;
+
+    protected Repository(HNDbContext context)
+    {
+      _context = context;
+      Entries = _context.Set<TEntity>();
+    }
+
+    protected async Task AddAsync(params TEntity[] entities)
+    {
+      await Entries.AddRangeAsync(entities);
+      await _context.SaveChangesAsync();
+    }
+  }
+}