GQL dynamic query :)

2021-02-04 13:51:31 -05:00
parent ffcfc60df1
commit edf9258a85
22 changed files with 643 additions and 18 deletions
@@ -0,0 +1,84 @@
+using HotChocolate.Types;
+using PoweredSoft.CQRS.Abstractions;
+using PoweredSoft.CQRS.Abstractions.Discovery;
+using PoweredSoft.CQRS.DynamicQuery.Discover;
+using System;
+
+namespace PoweredSoft.CQRS.GraphQL.HotChocolate.DynamicQuery
+{
+
+    internal class DynamicQueryObjectType : ObjectTypeExtension
+    {
+        private readonly IQueryDiscovery queryDiscovery;
+
+        public DynamicQueryObjectType(IQueryDiscovery queryDiscovery) : base()
+        {
+            this.queryDiscovery = queryDiscovery;
+        }
+
+        protected override void Configure(IObjectTypeDescriptor descriptor)
+        {
+            base.Configure(descriptor);
+            descriptor.Name("Query");
+
+            foreach(var q in queryDiscovery.GetQueries())
+            {
+                if (q.Category == "DynamicQuery" && q is DynamicQueryMeta dq)
+                {
+                    var f = descriptor.Field(q.LowerCamelCaseName);
+
+                    // service to execute with.
+                    var queryHandlerServiceType = typeof(IQueryHandler<,>).MakeGenericType(dq.QueryType, dq.QueryResultType);
+
+                    // destermine argument type.
+                    Type argumentType;
+                    Type runnerType;
+                    if (dq.ParamsType != null)
+                    {
+                        argumentType = typeof(GraphQL.DynamicQuery.GraphQLDynamicQuery<,,>).MakeGenericType(
+                            dq.SourceType, dq.DestinationType, dq.ParamsType);
+
+                        runnerType = typeof(DynamicQueryRunnerWithParams<,,>)
+                            .MakeGenericType(dq.SourceType, dq.DestinationType, dq.ParamsType);
+                    }
+                    else
+                    {
+                        argumentType = typeof(GraphQL.DynamicQuery.GraphQLDynamicQuery<,>).MakeGenericType(
+                            dq.SourceType, dq.DestinationType);
+
+                        runnerType = typeof(DynamicQueryRunner<,>)
+                            .MakeGenericType(dq.SourceType, dq.DestinationType);
+                    }
+
+                    f.Argument("params", a => a
+                        .Type(argumentType)
+                        .DefaultValue(Activator.CreateInstance(argumentType))
+                        );
+
+                    // make generic type of outgoing type.
+                    var resultType = typeof(GraphQL.DynamicQuery.GraphQLDynamicQueryExecutionResult<>)
+                        .MakeGenericType(dq.DestinationType);
+
+                    f.Type(resultType);
+
+                    // resolver
+                    f.Resolve(async r =>
+                    {
+                        dynamic argument = r.ArgumentValue<object>("params");
+                       
+                        // handler service.
+                        var service = r.Service(queryHandlerServiceType);
+
+                        // runner. 
+                        dynamic runner = Activator.CreateInstance(runnerType, new object[] { service });
+
+                        // get outcome.
+                        object outcome = await runner.RunAsync(argument, r.RequestAborted);
+
+                        return outcome;
+                    });
+                }
+            }
+        }
+    }
+}
@@ -0,0 +1,28 @@
+using PoweredSoft.CQRS.DynamicQuery;
+using PoweredSoft.CQRS.DynamicQuery.Abstractions;
+using PoweredSoft.CQRS.GraphQL.DynamicQuery;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace PoweredSoft.CQRS.GraphQL.HotChocolate.DynamicQuery
+{
+    public class DynamicQueryRunner<TSource, TDestination>
+        where TSource : class
+        where TDestination : class
+    {
+        private readonly DynamicQueryHandler<TSource, TDestination> handler;
+
+        public DynamicQueryRunner(DynamicQueryHandler<TSource, TDestination> handler)
+        {
+            this.handler = handler;
+        }
+
+        public async Task<GraphQLDynamicQueryExecutionResult<TDestination>> RunAsync(IDynamicQuery<TSource, TDestination> query, CancellationToken cancellationToken = default)
+        {
+            var result = await handler.HandleAsync(query);
+            var outcome = new GraphQLDynamicQueryExecutionResult<TDestination>();
+            outcome.FromResult(result);
+            return outcome;
+        }
+    }
+}
@@ -0,0 +1,29 @@
+using PoweredSoft.CQRS.DynamicQuery;
+using PoweredSoft.CQRS.DynamicQuery.Abstractions;
+using PoweredSoft.CQRS.GraphQL.DynamicQuery;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace PoweredSoft.CQRS.GraphQL.HotChocolate.DynamicQuery
+{
+    public class DynamicQueryRunnerWithParams<TSource, TDestination, TParams>
+        where TSource : class
+        where TDestination : class
+        where TParams : class
+    {
+        private readonly DynamicQueryHandler<TSource, TDestination, TParams> handler;
+
+        public DynamicQueryRunnerWithParams(DynamicQueryHandler<TSource, TDestination, TParams> handler)
+        {
+            this.handler = handler;
+        }
+
+        public async Task<GraphQLDynamicQueryExecutionResult<TDestination>> RunAsync(IDynamicQuery<TSource, TDestination, TParams> query, CancellationToken cancellationToken = default)
+        {
+            var result = await handler.HandleAsync(query);
+            var outcome = new GraphQLDynamicQueryExecutionResult<TDestination>();
+            outcome.FromResult(result);
+            return outcome;
+        }
+    }
+}
@@ -0,0 +1,16 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="HotChocolate" Version="11.0.9" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\PoweredSoft.CQRS.Abstractions\PoweredSoft.CQRS.Abstractions.csproj" />
+    <ProjectReference Include="..\PoweredSoft.CQRS.GraphQL.DynamicQuery\PoweredSoft.CQRS.GraphQL.DynamicQuery.csproj" />
+  </ItemGroup>
+
+</Project>
@@ -0,0 +1,15 @@
+using HotChocolate.Execution.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using System;
+
+namespace PoweredSoft.CQRS.GraphQL.HotChocolate.DynamicQuery
+{
+    public static class RequestExecutorBuilderExtensions
+    {
+        public static IRequestExecutorBuilder AddPoweredSoftDynamicQueries(this IRequestExecutorBuilder builder)
+        {
+            builder.AddTypeExtension<DynamicQueryObjectType>();
+            return builder;
+        }
+    }
+}