dotnet-cqrs/OpenHarbor.CQRS.AspNetCore/Mvc/QueryControllerFeatureProvider.cs

using System.Collections.Generic;
using System.Reflection;
using Microsoft.AspNetCore.Mvc.ApplicationParts;
using Microsoft.AspNetCore.Mvc.Controllers;
using Microsoft.Extensions.DependencyInjection;
using OpenHarbor.CQRS.Abstractions.Discovery;
using OpenHarbor.CQRS.AspNetCore.Abstractions.Attributes;

namespace OpenHarbor.CQRS.AspNetCore.Mvc;

public class QueryControllerFeatureProvider(ServiceProvider serviceProvider)
  : IApplicationFeatureProvider<ControllerFeature>
{
  public void PopulateFeature(IEnumerable<ApplicationPart> parts, ControllerFeature feature)
    {
        var queryDiscovery = serviceProvider.GetRequiredService<IQueryDiscovery>();
        foreach (var queryMeta in queryDiscovery.GetQueries())
        {
            var ignoreAttribute = queryMeta.QueryType.GetCustomAttribute<QueryControllerIgnoreAttribute>();
            if (ignoreAttribute != null)
                continue;

            if (queryMeta.Category != "BasicQuery")
                continue;

            var controllerType = typeof(QueryController<,>).MakeGenericType(queryMeta.QueryType, queryMeta.QueryResultType);
            var controllerTypeInfo = controllerType.GetTypeInfo();
            feature.Controllers.Add(controllerTypeInfo);
        }
    }
}