Working implementation

RAIC.Extensions.Configuration.EntityFrameworkCore/Extensions/ConfigurationBuilderExtensions.cs

@@ -0,0 +1,35 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.Extensions.Configuration;
+
+namespace RAIC.Extensions.Configuration.EntityFrameworkCore.Extensions;
+
+public static class ConfigurationBuilderExtensions
+{
+    public delegate DbContextOptionsBuilder<T> DbContextOptionsTransformer<T>(DbContextOptionsBuilder<T> transform) where T : DbContext;
+
+    /// <summary>
+    /// Adds a <see cref="DbSet{}"/> off <typeparamref name="TDbContext"/> as a configuration provider to the <see cref="IConfigurationBuilder"/>.
+    /// </summary>
+    /// <typeparam name="TDbContext">Type of the <see cref="DbContext"/> which implements <see cref="ISettingsDbContext{,}"/></typeparam>
+    /// <typeparam name="TSetting">Concrete type which implements <see cref="ISetting"/></typeparam>
+    /// <param name="optionsTransformer">
+    /// a <see cref="DbContextOptionsTransformer{}"/> which configures your <see cref="DbContextOptions{}"/>. eg.
+    /// <code>
+    ///   dbContextOptions => dbContextOptions.UseNpgsql(builder.Configuration.GetConnectionString("Default"))
+    /// </code>
+    /// </param>
+    /// <returns>The <see cref="IConfigurationBuilder"/></returns>
+    public static IConfigurationBuilder AddDbSet<TDbContext, TSetting>(this IConfigurationBuilder builder, DbContextOptionsTransformer<TDbContext> optionsTransformer)
+        where TDbContext : DbContext, ISettingsDbContext<DbSet<TSetting>, TSetting>
+        where TSetting : class, ISetting
+    {
+        // DEBT: Find way to create non-pooled DbContextFactory since this is only a short lived usage
+        var configurationSource = new EntityFrameworkCoreDbSetConfigurationSource<TDbContext, TSetting>()
+        {
+            DbContextFactory = new PooledDbContextFactory<TDbContext>(optionsTransformer(new DbContextOptionsBuilder<TDbContext>()).Options, poolSize: 1)
+        };
+
+        return builder.Add(configurationSource);
+    }
+}