public static ImmutableDictionary <TypeName, JsonType> GetJsonTypes(ImmutableArray <SyntaxTree> nodes, Compilation compilation)
{
var walker = new JsonAttributeScanningWalker(compilation);
foreach (var tinyType in TinyTypeScanningWalker.GetTinyTypes(compilation, nodes))
{
walker.VisitTinyType(tinyType);
}
foreach (var node in nodes)
{
walker.Visit(node.GetRoot());
}
return(walker.JsonTypes.ToImmutable());
}
public static string Generate(string outputPath, ImmutableArray <SyntaxTree> syntaxTrees, CSharpCompilation compilation)
{
using (var outputFile = new FileStream(Path.Combine(outputPath, "Converters.cs"), FileMode.Create, FileAccess.Write))
using (var writer = new StreamWriter(outputFile, leaveOpen: true))
{
writer.WriteLine("using System;");
writer.WriteLine("using System.Text.Json;");
writer.WriteLine("using System.Text.Json.Serialization;");
writer.WriteLine("using System.Collections.Immutable;");
writer.WriteLine();
writer.WriteLine("#pragma warning disable CA1801 // Unused parameter");
writer.WriteLine();
writer.WriteLine("namespace DNSMadeEasy.Json");
writer.WriteLine("{");
writer.WriteLine("partial class CustomJsonConverterFactory");
writer.WriteLine("{");
var jsonTypes = JsonAttributeScanningWalker.GetJsonTypes(syntaxTrees, compilation);
var anonymousTypes = JsonAnonymousTypeWithValueScanningWalker.GetAnonymousTypes(syntaxTrees, compilation);
writer.WriteLine($"private static ImmutableDictionary<Type, JsonConverter> CreateConverters()");
writer.WriteLine("{");
writer.WriteLine("var builder = ImmutableDictionary.CreateBuilder<Type, JsonConverter>();");
foreach (var type in jsonTypes.Values.Where(t => t.ConverterName != null))
{
writer.WriteLine($"builder.Add(typeof({type.Type}), new {type.ConverterName}());");
}
foreach (var(type, _, prototype) in anonymousTypes)
{
writer.WriteLine("{");
writer.WriteLine($@"var type = GetAnonymousType(false ? {prototype} : null);");
writer.WriteLine($"builder.Add(type, new ValueConverter(type));");
writer.WriteLine("}");
}
writer.WriteLine("return builder.ToImmutable();");
writer.WriteLine("}");
foreach (var type in jsonTypes.Values.Where(t => t.ConverterName != null))
{
writer.WriteLine();
writer.WriteLine($"private sealed class {type.ConverterName} : JsonConverter<{type.Type}>");
writer.WriteLine("{");
writer.WriteLine($"public override {type.Type} Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) => ReadInternal(ref reader, options);");
writer.WriteLine($"public override void Write(Utf8JsonWriter writer, {type.Type} value, JsonSerializerOptions options) => WriteInternal(writer, value, options);");
writer.WriteLine($"internal static {type.Type} ReadInternal(ref Utf8JsonReader reader, JsonSerializerOptions options)");
writer.WriteLine("{");
if (type.ConstructionMember is ConstructorDeclarationSyntax)
{
GenerateConstructorReader(type, writer, jsonTypes, compilation);
}
else if (type.ConstructionMember is MethodDeclarationSyntax)
{
GenerateParseReader(type, writer, jsonTypes, compilation);
}
else if (type.TinyType != null)
{
GenerateTinyTypeReader(type, writer, jsonTypes);
}
else if (type.ConstructionMember != null || type.TinyType != null)
{
throw new InvalidOperationException("Unknown declaration type");
}
writer.WriteLine("}");
writer.WriteLine();
writer.WriteLine($"internal static void WriteInternal(Utf8JsonWriter writer, {type.Type} value, JsonSerializerOptions options)");
writer.WriteLine("{");
if (type.ConstructionMember is ConstructorDeclarationSyntax)
{
writer.WriteLine("throw new NotImplementedException();"); //GenerateConstructorWriter(type, writer, jsonTypes);
}
else if (type.ConstructionMember is MethodDeclarationSyntax)
{
GenerateParseWriter(type, writer, jsonTypes, compilation);
}
else if (type.TinyType != null)
{
GenerateTinyTypeWriter(type, writer, jsonTypes);
}
else if (type.ConstructionMember != null || type.TinyType != null)
{
throw new InvalidOperationException("Unknown declaration type");
}
writer.WriteLine("}");
writer.WriteLine("}");
}
writer.WriteLine($"partial class ValueConverter");
writer.WriteLine("{");
writer.WriteLine("private static ImmutableDictionary<Type, Action<Utf8JsonWriter, object, JsonSerializerOptions>> CreateDelegates()");
writer.WriteLine("{");
writer.WriteLine("var builder = ImmutableDictionary.CreateBuilder<Type, Action<Utf8JsonWriter, object, JsonSerializerOptions>>();");
foreach (var(type, methodName, prototype) in anonymousTypes)
{
writer.WriteLine($@"builder.Add(GetAnonymousType(false ? {prototype} : null), {methodName});");
}
writer.WriteLine("return builder.ToImmutable();");
writer.WriteLine("}");
foreach (var(type, methodName, prototype) in anonymousTypes)
{
GenerateAnonymousTypeMethod(type, methodName, prototype, writer, jsonTypes, compilation);
}
writer.WriteLine("}");
writer.WriteLine("}");
writer.WriteLine("}");
return(outputFile.Name);
}
}
