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JsonResultBuilderGenerator.cs
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JsonResultBuilderGenerator.cs
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.Json;
using StrawberryShake.CodeGeneration.CSharp.Builders;
using StrawberryShake.CodeGeneration.CSharp.Extensions;
using StrawberryShake.CodeGeneration.Descriptors;
using StrawberryShake.CodeGeneration.Descriptors.TypeDescriptors;
using StrawberryShake.CodeGeneration.Extensions;
using static StrawberryShake.CodeGeneration.Descriptors.NamingConventions;
using static StrawberryShake.CodeGeneration.Utilities.NameUtils;
namespace StrawberryShake.CodeGeneration.CSharp.Generators
{
public partial class JsonResultBuilderGenerator : ClassBaseGenerator<ResultBuilderDescriptor>
{
private const string _entityStore = "_entityStore";
private const string entityStore = "entityStore";
private const string _idSerializer = "_idSerializer";
private const string _resultDataFactory = "_resultDataFactory";
private const string idSerializer = "idSerializer";
private const string resultDataFactory = "resultDataFactory";
private const string _serializerResolver = "serializerResolver";
private const string _entityIds = "entityIds";
private const string _obj = "obj";
private const string _response = "response";
protected override void Generate(
ResultBuilderDescriptor resultBuilderDescriptor,
CSharpSyntaxGeneratorSettings settings,
CodeWriter writer,
out string fileName,
out string? path,
out string ns)
{
InterfaceTypeDescriptor resultTypeDescriptor =
resultBuilderDescriptor.ResultNamedType as InterfaceTypeDescriptor
?? throw new InvalidOperationException(
"A result type can only be generated for complex types");
fileName = resultBuilderDescriptor.RuntimeType.Name;
path = State;
ns = resultBuilderDescriptor.RuntimeType.NamespaceWithoutGlobal;
ClassBuilder classBuilder = ClassBuilder
.New()
.SetName(fileName);
ConstructorBuilder constructorBuilder = classBuilder
.AddConstructor()
.SetTypeName(fileName);
classBuilder
.AddImplements(
TypeNames.IOperationResultBuilder.WithGeneric(
TypeNames.JsonDocument,
resultTypeDescriptor.RuntimeType.ToString()));
if (settings.IsStoreEnabled())
{
AddConstructorAssignedField(
TypeNames.IEntityStore,
_entityStore,
entityStore,
classBuilder,
constructorBuilder);
AddConstructorAssignedField(
TypeNames.IEntityIdSerializer,
_idSerializer,
idSerializer,
classBuilder,
constructorBuilder);
}
AddConstructorAssignedField(
TypeNames.IOperationResultDataFactory
.WithGeneric(resultTypeDescriptor.RuntimeType.ToString()),
_resultDataFactory,
resultDataFactory,
classBuilder,
constructorBuilder);
constructorBuilder
.AddParameter(_serializerResolver)
.SetType(TypeNames.ISerializerResolver);
IEnumerable<ValueParserDescriptor> valueParsers = resultBuilderDescriptor
.ValueParsers
.GroupBy(t => t.Name)
.Select(t => t.First());
foreach (ValueParserDescriptor valueParser in valueParsers)
{
var parserFieldName = $"{GetFieldName(valueParser.Name)}Parser";
classBuilder
.AddField(parserFieldName)
.SetReadOnly()
.SetType(
TypeNames.ILeafValueParser
.WithGeneric(valueParser.SerializedType, valueParser.RuntimeType));
MethodCallBuilder getLeaveValueParser = MethodCallBuilder
.Inline()
.SetMethodName(_serializerResolver, "GetLeafValueParser")
.AddGeneric(valueParser.SerializedType.ToString())
.AddGeneric(valueParser.RuntimeType.ToString())
.AddArgument(valueParser.Name.AsStringToken());
constructorBuilder.AddCode(
AssignmentBuilder
.New()
.SetAssertNonNull()
.SetAssertException(
ExceptionBuilder
.Inline(TypeNames.ArgumentException)
.AddArgument(
$"\"No serializer for type `{valueParser.Name}` found.\""))
.SetLefthandSide(parserFieldName)
.SetRighthandSide(getLeaveValueParser));
}
AddBuildMethod(resultTypeDescriptor, classBuilder);
AddBuildDataMethod(settings, resultTypeDescriptor, classBuilder);
var processed = new HashSet<string>();
AddRequiredDeserializeMethods(resultTypeDescriptor, classBuilder, processed);
classBuilder.Build(writer);
}
/// <summary>
/// Adds all required deserializers of the given type descriptors properties
/// </summary>
private void AddRequiredDeserializeMethods(
INamedTypeDescriptor namedTypeDescriptor,
ClassBuilder classBuilder,
HashSet<string> processed)
{
if (namedTypeDescriptor is InterfaceTypeDescriptor interfaceTypeDescriptor)
{
foreach (var @class in interfaceTypeDescriptor.ImplementedBy)
{
AddRequiredDeserializeMethods(@class, classBuilder, processed);
}
}
else if (namedTypeDescriptor is ComplexTypeDescriptor complexTypeDescriptor)
{
foreach (var property in complexTypeDescriptor.Properties)
{
AddDeserializeMethod(
property.Type,
classBuilder,
processed);
if (property.Type.NamedType() is INamedTypeDescriptor nt &&
!nt.IsLeaf())
{
AddRequiredDeserializeMethods(nt, classBuilder, processed);
}
}
}
}
private void AddDeserializeMethod(
ITypeDescriptor typeReference,
ClassBuilder classBuilder,
HashSet<string> processed)
{
string methodName = DeserializerMethodNameFromTypeName(typeReference);
if (processed.Add(methodName))
{
MethodBuilder methodBuilder = classBuilder
.AddMethod()
.SetPrivate()
.SetReturnType(typeReference.ToStateTypeReference())
.SetName(methodName);
if (typeReference.IsOrContainsEntity())
{
methodBuilder
.AddParameter(_session, x => x.SetType(TypeNames.IEntityStoreUpdateSession))
.AddParameter(_obj, x => x.SetType(TypeNames.JsonElement.MakeNullable()))
.AddParameter(
_entityIds,
x => x.SetType(TypeNames.ISet.WithGeneric(TypeNames.EntityId)));
}
else
{
methodBuilder
.AddParameter(_obj)
.SetType(TypeNames.JsonElement.MakeNullable());
}
IfBuilder jsonElementNullCheck = IfBuilder
.New()
.SetCondition($"!{_obj}.HasValue")
.AddCode(
typeReference.IsNonNullable()
? ExceptionBuilder.New(TypeNames.ArgumentNullException)
: CodeLineBuilder.From("return null;"));
methodBuilder
.AddCode(jsonElementNullCheck)
.AddEmptyLine();
AddDeserializeMethodBody(classBuilder, methodBuilder, typeReference, processed);
}
}
private void AddDeserializeMethodBody(
ClassBuilder classBuilder,
MethodBuilder methodBuilder,
ITypeDescriptor typeDescriptor,
HashSet<string> processed)
{
switch (typeDescriptor)
{
case ListTypeDescriptor listTypeDescriptor:
AddArrayHandler(classBuilder, methodBuilder, listTypeDescriptor, processed);
break;
case ILeafTypeDescriptor { Kind: TypeKind.Leaf } d:
AddScalarTypeDeserializerMethod(methodBuilder, d);
break;
case ComplexTypeDescriptor { Kind: TypeKind.EntityOrData } d:
AddEntityOrDataTypeDeserializerMethod(
classBuilder,
methodBuilder,
d,
processed);
break;
case ComplexTypeDescriptor { Kind: TypeKind.AbstractData } d:
AddDataTypeDeserializerMethod(classBuilder, methodBuilder, d, processed);
break;
case ComplexTypeDescriptor { Kind: TypeKind.Data } d:
AddDataTypeDeserializerMethod(classBuilder, methodBuilder, d, processed);
break;
case INamedTypeDescriptor { Kind: TypeKind.Entity } d:
AddUpdateEntityMethod(classBuilder, methodBuilder, d, processed);
break;
case NonNullTypeDescriptor d:
AddDeserializeMethodBody(classBuilder, methodBuilder, d.InnerType, processed);
break;
default:
throw new ArgumentOutOfRangeException(nameof(typeDescriptor));
}
}
private void AddBuildMethod(
InterfaceTypeDescriptor resultNamedType,
ClassBuilder classBuilder)
{
var buildMethod = classBuilder
.AddMethod()
.SetAccessModifier(AccessModifier.Public)
.SetName("Build")
.SetReturnType(
TypeReferenceBuilder
.New()
.SetName(TypeNames.IOperationResult)
.AddGeneric(resultNamedType.RuntimeType.Name));
buildMethod
.AddParameter(_response)
.SetType(TypeNames.Response.WithGeneric(TypeNames.JsonDocument));
var concreteResultType =
CreateResultInfoName(resultNamedType.ImplementedBy.First().RuntimeType.Name);
// (IGetFooResult Result, GetFooResultInfo Info)? data = null;
buildMethod.AddCode(
AssignmentBuilder
.New()
.SetLefthandSide(
$"({resultNamedType.RuntimeType.Name} Result, {concreteResultType} " +
"Info)? data")
.SetRighthandSide("null"));
// IReadOnlyList<IClientError>? errors = null;
buildMethod.AddCode(
AssignmentBuilder
.New()
.SetLefthandSide(
TypeNames.IReadOnlyList
.WithGeneric(TypeNames.IClientError)
.MakeNullable() + " errors")
.SetRighthandSide("null"));
buildMethod.AddEmptyLine();
buildMethod.AddEmptyLine();
buildMethod.AddCode(
IfBuilder.New()
.SetCondition("response.Exception is null")
.AddCode(CreateBuildDataSerialization())
.AddElse(CreateDataError("response.Exception"))
);
buildMethod.AddEmptyLine();
buildMethod.AddCode(
MethodCallBuilder
.New()
.SetReturn()
.SetNew()
.SetMethodName(TypeNames.OperationResult)
.AddGeneric(resultNamedType.RuntimeType.Name)
.AddArgument("data?.Result")
.AddArgument("data?.Info")
.AddArgument(_resultDataFactory)
.AddArgument("errors"));
}
private TryCatchBuilder CreateBuildDataSerialization()
{
return TryCatchBuilder
.New()
.AddTryCode(
IfBuilder
.New()
.SetCondition(
ConditionBuilder
.New()
.Set("response.Body != null"))
.AddCode(
IfBuilder
.New()
.SetCondition(
ConditionBuilder
.New()
.Set("response.Body.RootElement.TryGetProperty(" +
$"\"data\", out {TypeNames.JsonElement} " +
"dataElement) && dataElement.ValueKind == " +
$"{TypeNames.JsonValueKind}.Object"))
.AddCode("data = BuildData(dataElement);"))
.AddCode(
IfBuilder
.New()
.SetCondition(
ConditionBuilder
.New()
.Set(
"response.Body.RootElement.TryGetProperty(" +
$"\"errors\", out {TypeNames.JsonElement} " +
"errorsElement)"))
.AddCode($"errors = {TypeNames.ParseError}(errorsElement);")))
.AddCatchBlock(
CatchBlockBuilder
.New()
.SetExceptionVariable("ex")
.AddCode(CreateDataError()));
}
private static AssignmentBuilder CreateDataError(
string exception = "ex")
{
string dict = TypeNames.Dictionary.WithGeneric(
TypeNames.String,
TypeNames.Object.MakeNullable());
string body = "response.Body?.RootElement.ToString()";
MethodCallBuilder createClientError =
MethodCallBuilder
.Inline()
.SetNew()
.SetMethodName(TypeNames.ClientError)
.AddArgument($"{exception}.Message")
.AddArgument($"exception: {exception}")
.AddArgument($"extensions: new {dict} {{ {{ \"body\", {body} }} }}");
return AssignmentBuilder.New()
.SetLefthandSide("errors")
.SetRighthandSide(
ArrayBuilder.New()
.SetDetermineStatement(false)
.SetType(TypeNames.IClientError)
.AddAssignment(createClientError));
}
private MethodCallBuilder BuildUpdateMethodCall(PropertyDescriptor property)
{
MethodCallBuilder propertyAccessor = MethodCallBuilder
.Inline()
.SetMethodName(TypeNames.GetPropertyOrNull)
.AddArgument(_obj)
.AddArgument(property.FieldName.AsStringToken());
return BuildUpdateMethodCall(property.Type, propertyAccessor).SetWrapArguments();
}
private MethodCallBuilder BuildUpdateMethodCall(
ITypeDescriptor property,
ICode argument)
{
MethodCallBuilder deserializeMethodCaller = MethodCallBuilder
.Inline()
.SetMethodName(DeserializerMethodNameFromTypeName(property));
if (property.IsOrContainsEntity())
{
deserializeMethodCaller
.AddArgument(_session)
.AddArgument(argument)
.AddArgument(_entityIds);
}
else
{
deserializeMethodCaller.AddArgument(argument);
}
return deserializeMethodCaller;
}
private static string DeserializerMethodNameFromTypeName(ITypeDescriptor typeDescriptor)
{
var ret = typeDescriptor.IsEntity() ? "Update" : "Deserialize";
ret += BuildDeserializeMethodName(typeDescriptor);
return ret;
}
private static string BuildDeserializeMethodName(
ITypeDescriptor typeDescriptor,
bool parentIsList = false)
{
return typeDescriptor switch
{
ListTypeDescriptor listTypeDescriptor =>
BuildDeserializeMethodName(listTypeDescriptor.InnerType, true) + "Array",
InterfaceTypeDescriptor
{
ImplementedBy: { Count: > 1 },
ParentRuntimeType: { } parentRuntimeType
} => parentRuntimeType.Name,
INamedTypeDescriptor { Kind: TypeKind.Entity } d =>
CreateEntityType(
d.RuntimeType.Name,
d.RuntimeType.NamespaceWithoutGlobal)
.Name,
// TODO: we should look a better way to solve the array naming issue.
INamedTypeDescriptor d =>
d.RuntimeType.ToString() == TypeNames.ByteArray
? "ByteArray"
: d.RuntimeType.Name,
NonNullTypeDescriptor nonNullTypeDescriptor => parentIsList
? BuildDeserializeMethodName(nonNullTypeDescriptor.InnerType) + "NonNullable"
: "NonNullable" + BuildDeserializeMethodName(nonNullTypeDescriptor.InnerType),
_ => throw new ArgumentOutOfRangeException(nameof(typeDescriptor))
};
}
}
}