Added Fusion 15 base project structure. (#7743)

src/Directory.Packages.props

@@ -60,6 +60,7 @@
     <PackageVersion Include="System.Reactive" Version="6.0.0" />
     <PackageVersion Include="Xunit" Version="2.9.0" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.2" />
+    <PackageVersion Include="TUnit" Version="0.3.34" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'net9.0'">

src/HotChocolate/Fusion-vnext/Directory.Build.props

@@ -0,0 +1,4 @@
+<Project>
+  <Import Project="$([MSBuild]::GetPathOfFileAbove('Directory.Build.props', '$(MSBuildThisFileDirectory)..\'))" />
+
+</Project>

src/HotChocolate/Fusion-vnext/HotChocolate.Fusion-vnext.sln

@@ -0,0 +1,50 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.31903.59
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{1718E238-A6E5-42AE-A2D6-A0580457D486}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "HotChocolate.Fusion.Execution", "src\Fusion.Execution\HotChocolate.Fusion.Execution.csproj", "{1566D098-4146-4ECF-9F45-EA43D88EEAA9}"
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "test", "test", "{F7DA6A87-1AFE-479A-B138-96C32439ABF5}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "HotChocolate.Fusion.Execution.Tests", "test\Fusion.Execution.Tests\HotChocolate.Fusion.Execution.Tests.csproj", "{51749890-1860-46CD-B872-3E790C44A876}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "HotChocolate.Fusion.Composition", "src\Fusion.Composition\HotChocolate.Fusion.Composition.csproj", "{6524E2C7-12A0-4987-B146-46C077B46DC0}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "HotChocolate.Fusion.Composition.Tests", "test\Fusion.Composition.Tests\HotChocolate.Fusion.Composition.Tests.csproj", "{1B0E0209-A99B-4AA4-95DD-30828C9CB5A9}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{1566D098-4146-4ECF-9F45-EA43D88EEAA9}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{1566D098-4146-4ECF-9F45-EA43D88EEAA9}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{1566D098-4146-4ECF-9F45-EA43D88EEAA9}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{1566D098-4146-4ECF-9F45-EA43D88EEAA9}.Release|Any CPU.Build.0 = Release|Any CPU
+		{51749890-1860-46CD-B872-3E790C44A876}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{51749890-1860-46CD-B872-3E790C44A876}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{51749890-1860-46CD-B872-3E790C44A876}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{51749890-1860-46CD-B872-3E790C44A876}.Release|Any CPU.Build.0 = Release|Any CPU
+		{6524E2C7-12A0-4987-B146-46C077B46DC0}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{6524E2C7-12A0-4987-B146-46C077B46DC0}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{6524E2C7-12A0-4987-B146-46C077B46DC0}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{6524E2C7-12A0-4987-B146-46C077B46DC0}.Release|Any CPU.Build.0 = Release|Any CPU
+		{1B0E0209-A99B-4AA4-95DD-30828C9CB5A9}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{1B0E0209-A99B-4AA4-95DD-30828C9CB5A9}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{1B0E0209-A99B-4AA4-95DD-30828C9CB5A9}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{1B0E0209-A99B-4AA4-95DD-30828C9CB5A9}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(NestedProjects) = preSolution
+		{1566D098-4146-4ECF-9F45-EA43D88EEAA9} = {1718E238-A6E5-42AE-A2D6-A0580457D486}
+		{51749890-1860-46CD-B872-3E790C44A876} = {F7DA6A87-1AFE-479A-B138-96C32439ABF5}
+		{6524E2C7-12A0-4987-B146-46C077B46DC0} = {1718E238-A6E5-42AE-A2D6-A0580457D486}
+		{1B0E0209-A99B-4AA4-95DD-30828C9CB5A9} = {F7DA6A87-1AFE-479A-B138-96C32439ABF5}
+	EndGlobalSection
+EndGlobal

src/HotChocolate/Fusion-vnext/src/Directory.Build.props

@@ -0,0 +1,15 @@
+<Project>
+  <Import Project="$([MSBuild]::GetPathOfFileAbove('Directory.Build.props', '$(MSBuildThisFileDirectory)..\'))" />
+  <Import Project="$([MSBuild]::GetPathOfFileAbove('Nullable.props', '$(MSBuildThisFileDirectory)..\'))" />
+
+  <PropertyGroup>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <NoWarn>$(NoWarn);CA1812</NoWarn>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <IsAotCompatible>true</IsAotCompatible>
+  </PropertyGroup>
+
+</Project>

src/HotChocolate/Fusion-vnext/src/Fusion.Composition/HotChocolate.Fusion.Composition.csproj

@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <AssemblyName>HotChocolate.Fusion.Composition.Tests</AssemblyName>
+    <RootNamespace>HotChocolate.Composition</RootNamespace>
+  </PropertyGroup>
+
+</Project>

src/HotChocolate/Fusion/src/Fusion.Execution/HotChocolate.Fusion.Execution.csproj → src/HotChocolate/Fusion-vnext/src/Fusion.Execution/HotChocolate.Fusion.Execution.csproj

@@ -1,13 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <AssemblyName>HotChocolate.Fusion.Planning</AssemblyName>
+    <AssemblyName>HotChocolate.Fusion.Execution</AssemblyName>
     <RootNamespace>HotChocolate.Fusion</RootNamespace>
-    <Nullable>enable</Nullable>
-  </PropertyGroup>
-
-  <PropertyGroup>
-    <IsAotCompatible>true</IsAotCompatible>
   </PropertyGroup>
 
   <ItemGroup>

src/HotChocolate/Fusion-vnext/src/Fusion.Execution/Planning/IOperationNode.cs

@@ -0,0 +1,8 @@
+using HotChocolate.Language;
+
+namespace HotChocolate.Fusion.Planning;
+
+public interface IOperationNode
+{
+    ISyntaxNode ToSyntaxNode();
+}

src/HotChocolate/Fusion-vnext/src/Fusion.Execution/Planning/ISelection.cs

@@ -0,0 +1,13 @@
+using HotChocolate.Fusion.Types.Collections;
+using HotChocolate.Language;
+
+namespace HotChocolate.Fusion.Planning;
+
+public interface ISelection : IOperationNode
+{
+    SelectionSet? SelectionSet { get; }
+
+    DirectiveCollection Directives { get; }
+
+    new ISelectionNode ToSyntaxNode();
+}

src/HotChocolate/Fusion-vnext/src/Fusion.Execution/Planning/InlineFragment.cs

@@ -0,0 +1,40 @@
+using HotChocolate.Fusion.Types;
+using HotChocolate.Fusion.Types.Collections;
+using HotChocolate.Language;
+
+namespace HotChocolate.Fusion.Planning;
+
+public sealed class InlineFragment : ISelection
+{
+    public InlineFragment(
+        ICompositeNamedType type,
+        DirectiveCollection directives,
+        SelectionSet selectionSet)
+    {
+        Type = type;
+        Directives = directives;
+        SelectionSet = selectionSet;
+    }
+
+    public ICompositeNamedType Type { get; }
+
+    public DirectiveCollection Directives { get; }
+
+
+    public SelectionSet SelectionSet { get; }
+
+    public InlineFragmentNode ToSyntaxNode()
+    {
+        return new InlineFragmentNode(
+            null,
+            new NamedTypeNode(new NameNode(Type.Name)),
+            Directives.ToSyntaxNodes(),
+            SelectionSet.ToSyntaxNode());
+    }
+
+    ISelectionNode ISelection.ToSyntaxNode()
+        => ToSyntaxNode();
+
+    ISyntaxNode IOperationNode.ToSyntaxNode()
+        => ToSyntaxNode();
+}

src/HotChocolate/Fusion-vnext/src/Fusion.Execution/Planning/Nodes/FieldPlanNode.cs

@@ -0,0 +1,23 @@
+using HotChocolate.Fusion.Types;
+using HotChocolate.Language;
+
+namespace HotChocolate.Fusion.Planning;
+
+public class FieldPlanNode : SelectionPlanNode
+{
+    public FieldPlanNode(
+        FieldNode fieldNode,
+        CompositeOutputField field)
+        : base(field.Type.NamedType(), fieldNode.SelectionSet?.Selections)
+    {
+        FieldNode = fieldNode;
+        Field = field;
+        ResponseName = FieldNode.Alias?.Value ?? field.Name;
+    }
+
+    public string ResponseName { get; }
+
+    public FieldNode FieldNode { get; }
+
+    public CompositeOutputField Field { get; }
+}

src/HotChocolate/Fusion-vnext/src/Fusion.Execution/Planning/Nodes/IOperationPlanNodeProvider.cs

@@ -0,0 +1,6 @@
+namespace HotChocolate.Fusion.Planning;
+
+public interface IOperationPlanNodeProvider
+{
+    public IReadOnlyList<OperationPlanNode> Operations { get; }
+}

src/HotChocolate/Fusion-vnext/src/Fusion.Execution/Planning/Nodes/OperationPlanNode.cs

@@ -0,0 +1,46 @@
+using HotChocolate.Fusion.Types;
+using HotChocolate.Language;
+
+namespace HotChocolate.Fusion.Planning;
+
+/// <summary>
+/// Represents an operation to resolve data from a specific source schema.
+/// </summary>
+public sealed class OperationPlanNode : SelectionPlanNode, IOperationPlanNodeProvider
+{
+    private List<OperationPlanNode>? _operations;
+
+    public OperationPlanNode(
+        string schemaName,
+        ICompositeNamedType declaringType,
+        SelectionSetNode selectionSet,
+        PlanNode? parent = null)
+        : base(declaringType, selectionSet.Selections)
+    {
+        SchemaName = schemaName;
+        Parent = parent;
+    }
+
+    public OperationPlanNode(
+        string schemaName,
+        ICompositeNamedType declaringType,
+        IReadOnlyList<ISelectionNode> selections,
+        PlanNode? parent = null)
+        : base(declaringType, selections)
+    {
+        SchemaName = schemaName;
+        Parent = parent;
+    }
+
+    public string SchemaName { get; }
+
+    public IReadOnlyList<OperationPlanNode> Operations
+        => _operations ?? (IReadOnlyList<OperationPlanNode>)Array.Empty<OperationPlanNode>();
+
+    public void AddOperation(OperationPlanNode operation)
+    {
+        ArgumentNullException.ThrowIfNull(operation);
+        (_operations ??= []).Add(operation);
+        operation.Parent = this;
+    }
+}

src/HotChocolate/Fusion-vnext/src/Fusion.Execution/Planning/Nodes/PlanNode.cs

@@ -0,0 +1,6 @@
+namespace HotChocolate.Fusion.Planning;
+
+public abstract class PlanNode
+{
+    public PlanNode? Parent { get; internal set; }
+}

src/HotChocolate/Fusion-vnext/src/Fusion.Execution/Planning/Nodes/RootPlanNode.cs

@@ -0,0 +1,16 @@
+namespace HotChocolate.Fusion.Planning;
+
+public class RootPlanNode : PlanNode, IOperationPlanNodeProvider
+{
+    private readonly List<OperationPlanNode> _operations = new();
+
+    public IReadOnlyList<OperationPlanNode> Operations
+        => _operations;
+
+    public void AddOperation(OperationPlanNode operation)
+    {
+        ArgumentNullException.ThrowIfNull(operation);
+        _operations.Add(operation);
+        operation.Parent = this;
+    }
+}

src/HotChocolate/Fusion-vnext/src/Fusion.Execution/Planning/Nodes/SelectionPlanNode.cs

@@ -0,0 +1,83 @@
+using HotChocolate.Fusion.Types;
+using HotChocolate.Language;
+
+namespace HotChocolate.Fusion.Planning;
+
+/// <summary>
+/// The base class for plan nodes that can have child selections.
+/// </summary>
+public abstract class SelectionPlanNode : PlanNode
+{
+    private List<CompositeDirective>? _directives;
+    private List<SelectionPlanNode>? _selections;
+
+    /// <summary>
+    /// Initializes a new instance of <see cref="SelectionPlanNode"/>.
+    /// </summary>
+    /// <param name="declaringType">
+    /// The type on which this selection is declared on.
+    /// </param>
+    /// <param name="selectionNodes">
+    /// The child selection syntax nodes of this selection.
+    /// </param>
+    protected SelectionPlanNode(
+        ICompositeNamedType declaringType,
+        IReadOnlyList<ISelectionNode>? selectionNodes)
+    {
+        DeclaringType = declaringType;
+        IsEntity = declaringType.IsEntity();
+        SelectionNodes = selectionNodes;
+    }
+
+    /// <summary>
+    /// Gets the type on which this selection is declared on.
+    /// </summary>
+    public ICompositeNamedType DeclaringType { get; }
+
+    /// <summary>
+    /// Defines if the selection is declared on an entity type.
+    /// </summary>
+    public bool IsEntity { get; }
+
+    /// <summary>
+    /// Gets the directives that are annotated to this selection.
+    /// </summary>
+    public IReadOnlyList<CompositeDirective> Directives
+        => _directives ?? (IReadOnlyList<CompositeDirective>)Array.Empty<CompositeDirective>();
+
+    /// <summary>
+    /// Gets the child selection syntax nodes of this selection.
+    /// </summary>
+    public IReadOnlyList<ISelectionNode>? SelectionNodes { get; }
+
+    /// <summary>
+    /// Gets the child selections of this selection.
+    /// </summary>
+    public IReadOnlyList<SelectionPlanNode> Selections
+        => _selections ?? (IReadOnlyList<SelectionPlanNode>)Array.Empty<SelectionPlanNode>();
+
+    /// <summary>
+    /// Adds a child selection to this selection.
+    /// </summary>
+    /// <param name="selection">
+    /// The child selection that shall be added.
+    /// </param>
+    public void AddSelection(SelectionPlanNode selection)
+    {
+        ArgumentNullException.ThrowIfNull(selection);
+        (_selections ??= []).Add(selection);
+        selection.Parent = this;
+    }
+
+    /// <summary>
+    /// Adds a directive to the selection.
+    /// </summary>
+    /// <param name="directive">
+    /// The directive that shall be added.
+    /// </param>
+    public void AddDirective(CompositeDirective directive)
+    {
+        ArgumentNullException.ThrowIfNull(directive);
+        (_directives ??= []).Add(directive);
+    }
+}