Added initial structure for Fusion vNext Composition (#7807)

dictionary.txt

@@ -136,6 +136,7 @@ Rgba
 Rhai
 Roslynator
 runbooks
+Satisfiability
 Senn
 shoooe
 Skywalker

src/Directory.Packages.props

@@ -60,7 +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" />
+    <PackageVersion Include="TUnit" Version="0.4.71" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'net9.0'">

src/HotChocolate/Fusion-vnext/src/Fusion.Composition/CompositionContext.cs

@@ -0,0 +1,20 @@
+using System.Collections.Immutable;
+using HotChocolate.Fusion.Logging.Contracts;
+using HotChocolate.Skimmed;
+
+namespace HotChocolate.Fusion;
+
+internal sealed class CompositionContext(
+    ImmutableArray<SchemaDefinition> schemaDefinitions,
+    ICompositionLog compositionLog)
+{
+    /// <summary>
+    /// Gets the schema definitions.
+    /// </summary>
+    public ImmutableArray<SchemaDefinition> SchemaDefinitions { get; } = schemaDefinitions;
+
+    /// <summary>
+    /// Gets the composition log.
+    /// </summary>
+    public ICompositionLog Log { get; } = compositionLog;
+}

src/HotChocolate/Fusion-vnext/src/Fusion.Composition/Errors/CompositionError.cs

@@ -0,0 +1,6 @@
+namespace HotChocolate.Fusion.Errors;
+
+public sealed class CompositionError(string message)
+{
+    public string Message { get; } = message;
+}

src/HotChocolate/Fusion-vnext/src/Fusion.Composition/Errors/ErrorHelper.cs

@@ -0,0 +1,10 @@
+using HotChocolate.Fusion.PreMergeValidation.Contracts;
+using static HotChocolate.Fusion.Properties.CompositionResources;
+
+namespace HotChocolate.Fusion.Errors;
+
+internal static class ErrorHelper
+{
+    public static CompositionError PreMergeValidationRuleFailed(IPreMergeValidationRule rule)
+        => new(string.Format(ErrorHelper_PreMergeValidationRuleFailed, rule.GetType().Name));
+}

src/HotChocolate/Fusion-vnext/src/Fusion.Composition/Extensions/TypeDefinitionExtensions.cs

@@ -0,0 +1,16 @@
+using HotChocolate.Skimmed;
+
+namespace HotChocolate.Fusion.Extensions;
+
+internal static class TypeDefinitionExtensions
+{
+    public static ITypeDefinition InnerNullableType(this ITypeDefinition type)
+    {
+        return type switch
+        {
+            ListTypeDefinition listType => listType.ElementType.NullableType(),
+            NonNullTypeDefinition nonNullType => nonNullType.NullableType,
+            _ => type
+        };
+    }
+}

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

@@ -1,8 +1,31 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <AssemblyName>HotChocolate.Fusion.Composition</AssemblyName>
     <RootNamespace>HotChocolate.Fusion</RootNamespace>
   </PropertyGroup>
 
+  <ItemGroup>
+    <InternalsVisibleTo Include="HotChocolate.Fusion.Composition.Tests" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\..\Skimmed\src\Skimmed\Skimmed.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <EmbeddedResource Update="Properties\CompositionResources.resx">
+      <Generator>ResXFileCodeGenerator</Generator>
+      <LastGenOutput>CompositionResources.Designer.cs</LastGenOutput>
+    </EmbeddedResource>
+  </ItemGroup>
+
+  <ItemGroup>
+    <Compile Update="Properties\CompositionResources.Designer.cs">
+      <DesignTime>True</DesignTime>
+      <AutoGen>True</AutoGen>
+      <DependentUpon>CompositionResources.resx</DependentUpon>
+    </Compile>
+  </ItemGroup>
+
 </Project>

src/HotChocolate/Fusion-vnext/src/Fusion.Composition/Logging/CompositionLog.cs

@@ -0,0 +1,27 @@
+using System.Collections;
+using HotChocolate.Fusion.Logging.Contracts;
+
+namespace HotChocolate.Fusion.Logging;
+
+public sealed class CompositionLog : ICompositionLog, IEnumerable<LogEntry>
+{
+    public bool IsEmpty => _entries.Count == 0;
+
+    private readonly List<LogEntry> _entries = [];
+
+    public void Write(LogEntry entry)
+    {
+        ArgumentNullException.ThrowIfNull(entry);
+
+        _entries.Add(entry);
+    }
+
+    public ILoggingSession CreateSession()
+    {
+        return new LoggingSession(this);
+    }
+
+    public IEnumerator<LogEntry> GetEnumerator() => _entries.GetEnumerator();
+
+    IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
+}

src/HotChocolate/Fusion-vnext/src/Fusion.Composition/Logging/Contracts/ICompositionLog.cs

@@ -0,0 +1,21 @@
+namespace HotChocolate.Fusion.Logging.Contracts;
+
+/// <summary>
+/// Defines an interface for logging composition information, warnings, and errors.
+/// </summary>
+public interface ICompositionLog
+{
+    bool IsEmpty { get; }
+
+    /// <summary>
+    /// Writes the specified <see cref="LogEntry"/> to the log.
+    /// </summary>
+    /// <param name="entry">The <see cref="LogEntry"/> to write.</param>
+    void Write(LogEntry entry);
+
+    /// <summary>
+    /// Creates a new logging session that keeps track of the number of info, warning, and error
+    /// entries logged.
+    /// </summary>
+    ILoggingSession CreateSession();
+}

src/HotChocolate/Fusion-vnext/src/Fusion.Composition/Logging/Contracts/ILoggingSession.cs

@@ -0,0 +1,12 @@
+namespace HotChocolate.Fusion.Logging.Contracts;
+
+public interface ILoggingSession
+{
+    int InfoCount { get; }
+
+    int WarningCount { get; }
+
+    int ErrorCount { get; }
+
+    void Write(LogEntry entry);
+}

src/HotChocolate/Fusion-vnext/src/Fusion.Composition/Logging/LogEntry.cs

@@ -0,0 +1,71 @@
+using HotChocolate.Skimmed;
+
+namespace HotChocolate.Fusion.Logging;
+
+/// <summary>
+/// Represents an entry in a composition log that describes an issue encountered during the
+/// composition process.
+/// </summary>
+public sealed record LogEntry
+{
+    /// <summary>
+    /// Initializes a new instance of the <see cref="LogEntry"/> record with the specified values.
+    /// </summary>
+    public LogEntry(
+        string message,
+        string code,
+        LogSeverity severity = LogSeverity.Error,
+        SchemaCoordinate? coordinate = null,
+        ITypeSystemMemberDefinition? member = null,
+        SchemaDefinition? schema = null,
+        object? extension = null)
+    {
+        ArgumentNullException.ThrowIfNull(message);
+        ArgumentNullException.ThrowIfNull(code);
+
+        Message = message;
+        Code = code;
+        Severity = severity;
+        Coordinate = coordinate;
+        Member = member;
+        Schema = schema;
+        Extension = extension;
+    }
+
+    /// <summary>
+    /// Gets the message associated with this log entry.
+    /// </summary>
+    public string Message { get; }
+
+    /// <summary>
+    /// Gets the code associated with this log entry.
+    /// </summary>
+    public string Code { get; }
+
+    /// <summary>
+    /// Gets the severity of this log entry.
+    /// </summary>
+    public LogSeverity Severity { get; }
+
+    /// <summary>
+    /// Gets the schema coordinate associated with this log entry.
+    /// </summary>
+    public SchemaCoordinate? Coordinate { get; }
+
+    /// <summary>
+    /// Gets the type system member associated with this log entry.
+    /// </summary>
+    public ITypeSystemMemberDefinition? Member { get; }
+
+    /// <summary>
+    /// Gets the schema associated with this log entry.
+    /// </summary>
+    public SchemaDefinition? Schema { get; }
+
+    /// <summary>
+    /// Gets the extension object associated with this log entry.
+    /// </summary>
+    public object? Extension { get; }
+
+    public override string ToString() => Message;
+}

src/HotChocolate/Fusion-vnext/src/Fusion.Composition/Logging/LogEntryCodes.cs

@@ -0,0 +1,7 @@
+namespace HotChocolate.Fusion.Logging;
+
+public static class LogEntryCodes
+{
+    public const string DisallowedInaccessible = "DISALLOWED_INACCESSIBLE";
+    public const string OutputFieldTypesNotMergeable = "OUTPUT_FIELD_TYPES_NOT_MERGEABLE";
+}

src/HotChocolate/Fusion-vnext/src/Fusion.Composition/Logging/LogEntryHelper.cs

@@ -0,0 +1,88 @@
+using HotChocolate.Skimmed;
+using static HotChocolate.Fusion.Properties.CompositionResources;
+
+namespace HotChocolate.Fusion.Logging;
+
+internal static class LogEntryHelper
+{
+    public static LogEntry DisallowedInaccessibleScalar(
+        ScalarTypeDefinition scalar,
+        SchemaDefinition schema)
+        => new(
+            string.Format(LogEntryHelper_DisallowedInaccessibleScalar, scalar.Name),
+            LogEntryCodes.DisallowedInaccessible,
+            LogSeverity.Error,
+            new SchemaCoordinate(scalar.Name),
+            scalar,
+            schema);
+
+    public static LogEntry DisallowedInaccessibleIntrospectionType(
+        INamedTypeDefinition type,
+        SchemaDefinition schema)
+        => new(
+            string.Format(LogEntryHelper_DisallowedInaccessibleIntrospectionType, type.Name),
+            LogEntryCodes.DisallowedInaccessible,
+            LogSeverity.Error,
+            new SchemaCoordinate(type.Name),
+            type,
+            schema);
+
+    public static LogEntry DisallowedInaccessibleIntrospectionField(
+        OutputFieldDefinition field,
+        string typeName,
+        SchemaDefinition schema)
+        => new(
+            string.Format(
+                LogEntryHelper_DisallowedInaccessibleIntrospectionField,
+                field.Name,
+                typeName),
+            LogEntryCodes.DisallowedInaccessible,
+            LogSeverity.Error,
+            new SchemaCoordinate(typeName, field.Name),
+            field,
+            schema);
+
+    public static LogEntry DisallowedInaccessibleIntrospectionArgument(
+        InputFieldDefinition argument,
+        string fieldName,
+        string typeName,
+        SchemaDefinition schema)
+    {
+        var coordinate = new SchemaCoordinate(typeName, fieldName, argument.Name);
+
+        return new LogEntry(
+            string.Format(
+                LogEntryHelper_DisallowedInaccessibleIntrospectionArgument,
+                argument.Name,
+                coordinate),
+            LogEntryCodes.DisallowedInaccessible,
+            LogSeverity.Error,
+            coordinate,
+            argument,
+            schema);
+    }
+
+    public static LogEntry DisallowedInaccessibleDirectiveArgument(
+        InputFieldDefinition argument,
+        string directiveName,
+        SchemaDefinition schema)
+        => new(
+            string.Format(
+                LogEntryHelper_DisallowedInaccessibleDirectiveArgument,
+                argument.Name,
+                directiveName),
+            LogEntryCodes.DisallowedInaccessible,
+            LogSeverity.Error,
+            new SchemaCoordinate(directiveName, argumentName: argument.Name, ofDirective: true),
+            schema: schema);
+
+    public static LogEntry OutputFieldTypesNotMergeable(string typeName, string fieldName)
+        => new(
+            string.Format(
+                LogEntryHelper_OutputFieldTypesNotMergeable,
+                typeName,
+                fieldName),
+            LogEntryCodes.OutputFieldTypesNotMergeable,
+            LogSeverity.Error,
+            new SchemaCoordinate(typeName, fieldName));
+}

src/HotChocolate/Fusion-vnext/src/Fusion.Composition/Logging/LogSeverity.cs

@@ -0,0 +1,22 @@
+namespace HotChocolate.Fusion.Logging;
+
+/// <summary>
+/// Defines the severity of the log entry.
+/// </summary>
+public enum LogSeverity
+{
+    /// <summary>
+    /// The entry contains an informational message.
+    /// </summary>
+    Info,
+
+    /// <summary>
+    /// The entry contains a warning message.
+    /// </summary>
+    Warning,
+
+    /// <summary>
+    /// The entry contains an error message.
+    /// </summary>
+    Error
+}

src/HotChocolate/Fusion-vnext/src/Fusion.Composition/Logging/LoggingSession.cs

@@ -0,0 +1,37 @@
+using HotChocolate.Fusion.Logging.Contracts;
+
+namespace HotChocolate.Fusion.Logging;
+
+public sealed class LoggingSession(ICompositionLog compositionLog) : ILoggingSession
+{
+    public int InfoCount { get; private set; }
+
+    public int WarningCount { get; private set; }
+
+    public int ErrorCount { get; private set; }
+
+    public void Write(LogEntry entry)
+    {
+        ArgumentNullException.ThrowIfNull(entry);
+
+        switch (entry.Severity)
+        {
+            case LogSeverity.Info:
+                InfoCount++;
+                break;
+
+            case LogSeverity.Warning:
+                WarningCount++;
+                break;
+
+            case LogSeverity.Error:
+                ErrorCount++;
+                break;
+
+            default:
+                throw new InvalidOperationException();
+        }
+
+        compositionLog.Write(entry);
+    }
+}