public override void OnConfigure(
IDescriptorContext context,
IObjectFieldDescriptor descriptor,
MemberInfo member)
{
descriptor.Use(_ => _);
}
public static IObjectFieldDescriptor UseCustomSelection <TType>(this IObjectFieldDescriptor descriptor)
{
descriptor
.Use <CustomSelectionMiddleware <TType> >();
return(descriptor);
}
public static IObjectFieldDescriptor UsePaging(
IObjectFieldDescriptor descriptor,
Type?type,
Type?entityType = null,
GetPagingProvider?resolvePagingProvider = null,
PagingOptions options = default)
{
if (descriptor is null)
{
throw new ArgumentNullException(nameof(descriptor));
}
FieldMiddleware placeholder = next => context => default;
descriptor
.Use(placeholder)
.Extend()
.OnBeforeCreate(definition =>
{
definition.Configurations.Add(
new TypeConfiguration <ObjectFieldDefinition>
{
Definition = definition,
On = ApplyConfigurationOn.Completion,
Configure = (c, d) => ApplyConfiguration(
c, d, entityType, resolvePagingProvider, options, placeholder)
});
});
return(descriptor);
}
private void ApplyConfigurationToField <TEntity, TType>(
IObjectFieldDescriptor field,
bool withPaging)
where TEntity : class
where TType : FilterInputType <TEntity>
{
field.Use(
next => async context =>
{
await next(context);
if (context.Result is IQueryable <TEntity> queryable)
{
try
{
context.ContextData["sql"] = queryable.ToQueryString();
}
catch (Exception)
{
context.ContextData["sql"] =
"EF Core 3.1 does not support ToQueryString";
}
}
});
if (withPaging)
{
field.UsePaging <ObjectType <TEntity> >();
}
field.UseFiltering <TType>();
}
public static IObjectFieldDescriptor UseBewitProtection <TPayload>(
this IObjectFieldDescriptor descriptor)
{
return(descriptor
.Use <BewitMiddleware <TPayload> >()
.Type <NonNullType <StringType> >());
}
public static IObjectFieldDescriptor Use <TMiddleware>(
this IObjectFieldDescriptor descriptor)
where TMiddleware : class
{
return(descriptor.Use(
FieldClassMiddlewareFactory.Create <TMiddleware>()));
}
public static IObjectFieldDescriptor UseDataloader(
this IObjectFieldDescriptor descriptor,
Type dataLoaderType)
{
FieldMiddleware placeholder = next => context => default;
if (!TryGetDataLoaderTypes(dataLoaderType, out Type? keyType, out Type? valueType))
{
throw DataLoader_InvalidType(dataLoaderType);
}
descriptor
.Use(placeholder)
.Extend()
.OnBeforeCreate(
(c, definition) =>
{
IExtendedType schemaType;
if (!valueType.IsArray)
{
IExtendedType resolverType =
c.TypeInspector.GetType(definition.ResultType);
if (resolverType.IsArrayOrList)
{
schemaType = c.TypeInspector.GetType(
typeof(IEnumerable <>).MakeGenericType(valueType));
}
else
{
schemaType = c.TypeInspector.GetType(valueType);
}
}
else
{
schemaType = c.TypeInspector.GetType(valueType);
}
definition.Type = TypeReference.Create(schemaType, TypeContext.Output);
definition.Configurations.Add(
LazyTypeConfigurationBuilder
.New <ObjectFieldDefinition>()
.Definition(definition)
.Configure(
(context, def) =>
{
CompileMiddleware(
def,
placeholder,
keyType,
valueType,
dataLoaderType);
})
.On(ApplyConfigurationOn.Completion)
.Build());
});
return(descriptor);
}
/// <summary>
/// Attach authorizator to the field.
/// </summary>
/// <returns>Field descriptor with middleware attached.</returns>
public static IObjectFieldDescriptor UseAuthorization(this IObjectFieldDescriptor descriptor)
{
return(descriptor.Use((services, next)
=> new Authorizator(next, services
.CreateScope()
.ServiceProvider
.GetRequiredService <Tokenizer>())));
}
private static IObjectFieldDescriptor ApplyMiddleware(
this IObjectFieldDescriptor descriptor,
string optionName,
Type middlewareDefinition)
{
if (descriptor is null)
{
throw new ArgumentNullException(nameof(descriptor));
}
FieldMiddleware placeholder = next => context => default;
descriptor
.Use(placeholder)
.Extend()
.OnBeforeCreate(
(context, definition) =>
{
definition.ContextData[optionName] = null;
if (definition.ResultType is null ||
!context.TypeInspector.TryCreateTypeInfo(
definition.ResultType,
out ITypeInfo? typeInfo))
{
Type resultType = definition.ResolverType ?? typeof(object);
throw new ArgumentException(
$"Cannot handle the specified type `{resultType.FullName}`.",
nameof(descriptor));
}
Type selectionType = typeInfo.NamedType;
definition.ResultType = selectionType;
definition.Type = RewriteToNonNullableType(
context.TypeInspector,
definition.Type);
ILazyTypeConfiguration lazyConfiguration =
LazyTypeConfigurationBuilder
.New <ObjectFieldDefinition>()
.Definition(definition)
.Configure(
(_, __) =>
{
CompileMiddleware(
selectionType,
definition,
placeholder,
middlewareDefinition);
})
.On(ApplyConfigurationOn.Completion)
.Build();
definition.Configurations.Add(lazyConfiguration);
});
return(descriptor);
}
public static IObjectFieldDescriptor UseAutoMapperProjection(
this IObjectFieldDescriptor descriptor,
Type objectType)
{
FieldMiddleware placeholder = next => context => default;
descriptor
.Use(placeholder)
.Extend()
.OnBeforeCreate(
(context, definition) =>
{
if (definition.ResultType is null ||
!context.TypeInspector.TryCreateTypeInfo(
definition.ResultType,
out ITypeInfo? typeInfo))
{
Type resultType = definition.ResolverType ?? typeof(object);
throw new ArgumentException(
$"Cannot handle the specified type `{resultType.FullName}`.",
nameof(descriptor));
}
if (!typeof(IQueryable).IsAssignableFrom(definition.ResultType))
{
throw new ArgumentException(
$"Cannot handle the specified type `{definition.ResultType.FullName}`.",
nameof(descriptor));
}
Type selectionType = typeInfo.NamedType;
definition.ResultType = typeof(IQueryable <>).MakeGenericType(objectType);
definition.Type = context.TypeInspector.GetTypeRef(definition.ResultType);
ILazyTypeConfiguration lazyConfiguration =
LazyTypeConfigurationBuilder
.New <ObjectFieldDefinition>()
.Definition(definition)
.Configure(
(_, __) =>
{
CompileMiddleware(
selectionType,
objectType,
definition,
placeholder,
_middlewareDefinition);
})
.On(ApplyConfigurationOn.Completion)
.Build();
definition.Configurations.Add(lazyConfiguration);
});
return(descriptor);
}
/// <summary>
/// Projects the selection set of the request onto the field. Registers a middleware that
/// uses the registered <see cref="ProjectionConvention"/> to apply the projections
/// </summary>
/// <param name="descriptor">The descriptor</param>
/// <param name="scope">
/// Specify which <see cref="ProjectionConvention"/> is used, based on the value passed in
/// <see cref="ProjectionsSchemaBuilderExtensions.AddProjections{T}"/>
/// </param>
/// <param name="type">
/// The <see cref="Type"/> of the resolved field
/// </param>
/// <returns>The descriptor passed in by <paramref name="descriptor"/></returns>
/// <exception cref="ArgumentNullException">
/// In case the descriptor is null
/// </exception>
public static IObjectFieldDescriptor UseProjection(
this IObjectFieldDescriptor descriptor,
Type?type,
string?scope = null)
{
if (descriptor is null)
{
throw new ArgumentNullException(nameof(descriptor));
}
FieldMiddleware placeholder = next => context => default;
descriptor
.Use(placeholder)
.Extend()
.OnBeforeCreate(
(context, definition) =>
{
Type?selectionType = type;
if (selectionType is null)
{
if (definition.ResultType is null ||
!context.TypeInspector.TryCreateTypeInfo(
definition.ResultType,
out ITypeInfo? typeInfo))
{
throw new ArgumentException(
"Cannot handle the specified type.",
nameof(descriptor));
}
selectionType = typeInfo.NamedType;
}
ILazyTypeConfiguration lazyConfiguration =
LazyTypeConfigurationBuilder
.New <ObjectFieldDefinition>()
.Definition(definition)
.Configure(
(context, definition) =>
CompileMiddleware(
selectionType,
definition,
placeholder,
context,
scope))
.On(ApplyConfigurationOn.Completion)
.Build();
definition.Configurations.Add(lazyConfiguration);
});
return(descriptor);
}
/// <summary>
/// Adds FluentValidation field middleware.
/// It is going to validate all non-null field arguments and report errors if there is one or more failures.
/// </summary>
/// <param name="errorBuilderType">Custom error builder class type used to construct single validation error.</param>
public static IObjectFieldDescriptor UseFluentValidation(
this IObjectFieldDescriptor descriptor,
Type errorBuilderType)
{
if (!(typeof(IValidationErrorBuilder).IsAssignableFrom(errorBuilderType) && errorBuilderType.IsClass))
{
throw new ArgumentException($"{errorBuilderType.Name} is not a class implementing {nameof(IValidationErrorBuilder)}!");
}
return(descriptor.Use((provider, next) =>
new FluentValidationMiddleware(next, errorBuilderType)));
}
public static IObjectFieldDescriptor Use <TMiddleware>(
this IObjectFieldDescriptor descriptor,
Func <IServiceProvider, FieldDelegate, TMiddleware> factory)
where TMiddleware : class
{
if (factory is null)
{
throw new ArgumentNullException(nameof(factory));
}
return(descriptor.Use(FieldClassMiddlewareFactory.Create(factory)));
}
/// <summary>
/// Adds TransactionScope field middleware.
/// </summary>
/// <param name="factoryType">Custom TransactionScope factory class type implementing <see cref="ITransactionScopeFactory"/>.</param>
public static IObjectFieldDescriptor UseTransactionScope(
this IObjectFieldDescriptor descriptor,
Type factoryType)
{
if (!(typeof(ITransactionScopeFactory).IsAssignableFrom(factoryType) && factoryType.IsClass))
{
throw new ArgumentException($"{factoryType.Name} is not a class implementing {nameof(ITransactionScopeFactory)}!");
}
return(descriptor.Use((provider, next) =>
new TransactionScopeMiddleware(next, factoryType)));
}
public override void OnConfigure(
IDescriptorContext context,
IObjectFieldDescriptor descriptor,
MemberInfo member)
{
descriptor.Use(next => context =>
{
context.LocalContextData =
context.LocalContextData.SetItem(
QueryableProjectionProvider.ContextApplyProjectionKey,
CreateApplicatorAsync <Foo>());
return(next(context));
});
}
public static IObjectFieldDescriptor UseSorting(
this IObjectFieldDescriptor descriptor,
Type sortType,
ITypeSystemMember sortTypeInstance = null)
{
FieldMiddleware placeholder =
next => context => Task.CompletedTask;
descriptor
.Use(placeholder)
.Extend()
.OnBeforeCreate(definition =>
{
Type argumentType = GetArgumentType(definition, sortType);
ITypeReference argumentTypeReference =
sortTypeInstance is null
? (ITypeReference) new ClrTypeReference(
argumentType, TypeContext.Input)
: new SchemaTypeReference(sortTypeInstance);
var argumentDefinition = new ArgumentDefinition
{
Name = OrderByArgumentName,
Type = new ClrTypeReference(
argumentType, TypeContext.Input)
};
definition.Arguments.Add(argumentDefinition);
ILazyTypeConfiguration lazyConfiguration =
LazyTypeConfigurationBuilder
.New <ObjectFieldDefinition>()
.Definition(definition)
.Configure((context, defintion) =>
CompileMiddleware(
context,
definition,
argumentTypeReference,
placeholder))
.On(ApplyConfigurationOn.Completion)
.DependsOn(argumentTypeReference, true)
.Build();
definition.Configurations.Add(lazyConfiguration);
});
return(descriptor);
}
public override void OnConfigure(
IDescriptorContext context,
IObjectFieldDescriptor descriptor,
MemberInfo member)
{
descriptor.Use(next => async context =>
{
try
{
await next(context);
}
catch (Exception ex)
{
context.ContextData["ex"] = ex.Message;
}
});
}
private static IObjectFieldDescriptor UseSelection(
IObjectFieldDescriptor descriptor,
Type?objectType)
{
FieldMiddleware placeholder =
next => context => Task.CompletedTask;
descriptor
.Use(placeholder)
.Extend()
.OnBeforeCreate(definition =>
{
Type?selectionType = objectType;
if (selectionType == null)
{
if (!TypeInspector.Default.TryCreate(
definition.ResultType, out TypeInfo typeInfo))
{
// TODO : resources
throw new ArgumentException(
"Cannot handle the specified type.",
nameof(descriptor));
}
selectionType = typeInfo.ClrType;
}
ILazyTypeConfiguration lazyConfiguration =
LazyTypeConfigurationBuilder
.New <ObjectFieldDefinition>()
.Definition(definition)
.Configure((context, defintion) =>
CompileMiddleware(
selectionType,
definition,
placeholder,
context))
.On(ApplyConfigurationOn.Completion)
.Build();
definition.Configurations.Add(lazyConfiguration);
});
return(descriptor);
}
public static IObjectFieldDescriptor ID(
this IObjectFieldDescriptor descriptor,
NameString typeName = default)
{
if (descriptor is null)
{
throw new ArgumentNullException(nameof(descriptor));
}
FieldMiddleware placeholder = n => c => default;
descriptor.Use(placeholder);
descriptor.Extend().OnBeforeCreate(RewriteObjectFieldType);
descriptor.Extend().OnBeforeCompletion(
(c, d) => AddSerializerToObjectField(c, d, placeholder, typeName));
return(descriptor);
}
public override void OnConfigure(
IDescriptorContext context,
IObjectFieldDescriptor descriptor,
MemberInfo member)
{
descriptor.Use(next => context =>
{
if (!context.ContextData.ContainsKey("currentUserId"))
{
context.ReportError(
ErrorBuilder.New()
.SetMessage("Must be authorized to perform this action")
.SetCode("NOT_AUTHORIZED")
.Build());
context.Result = new ForbidResult();
}
return(next(context));
});
}
public static IObjectFieldDescriptor UseAutoSubscription(this IObjectFieldDescriptor descriptor, string subscriptionName)
{
descriptor
.Extend()
.OnBeforeNaming((configure, defn) =>
{
if (!configure.ContextData.ContainsKey(AutoSubscriptionTypeInterceptor.AutoSubscriptionContext))
{
configure.ContextData[AutoSubscriptionTypeInterceptor.AutoSubscriptionContext] = new List <ObjectFieldDefinition>();
}
((List <ObjectFieldDefinition>)configure.ContextData[AutoSubscriptionTypeInterceptor.AutoSubscriptionContext]).Add(defn);
});
descriptor.Use(next => async context =>
{
await next(context);
await context.SendSimpleSubscription(subscriptionName, context.Result);
});
return(descriptor);
}
public static IObjectFieldDescriptor UsePaging(
IObjectFieldDescriptor descriptor,
Type?type,
Type?entityType = null,
GetPagingProvider?resolvePagingProvider = null,
PagingOptions options = default)
{
if (descriptor is null)
{
throw new ArgumentNullException(nameof(descriptor));
}
FieldMiddleware placeholder = next => context => default;
descriptor
.Use(placeholder)
.Extend()
.OnBeforeCreate((c, d) =>
{
MemberInfo?member = d.ResolverMember ?? d.Member;
IExtendedType schemaType = GetSchemaType(c.TypeInspector, member, type);
var configuration = new TypeConfiguration <ObjectFieldDefinition>
{
Definition = d,
On = ApplyConfigurationOn.Completion,
Configure = (c, d) => ApplyConfiguration(
c, d, entityType, resolvePagingProvider, options, placeholder)
};
configuration.Dependencies.Add(
new TypeDependency(
TypeReference.Create(schemaType, TypeContext.Output),
TypeDependencyKind.Named));
d.Configurations.Add(configuration);
});
return(descriptor);
}
private static IObjectFieldDescriptor UseFiltering(
IObjectFieldDescriptor descriptor,
Type?filterType,
ITypeSystemMember?filterTypeInstance,
string?scope)
{
FieldMiddleware placeholder = next => context => default;
string argumentPlaceholder =
"_" + Guid.NewGuid().ToString("N", CultureInfo.InvariantCulture);
descriptor
.Use(placeholder)
.Extend()
.OnBeforeCreate(
(c, definition) =>
{
IFilterConvention convention = c.GetFilterConvention(scope);
ITypeReference argumentTypeReference;
if (filterTypeInstance is not null)
{
argumentTypeReference = TypeReference.Create(filterTypeInstance, scope);
}
else if (filterType is null)
{
if (definition.ResultType is null ||
definition.ResultType == typeof(object) ||
!c.TypeInspector.TryCreateTypeInfo(
definition.ResultType,
out ITypeInfo? typeInfo))
{
throw new ArgumentException(
FilterObjectFieldDescriptorExtensions_UseFiltering_CannotHandleType,
nameof(descriptor));
}
argumentTypeReference = convention.GetFieldType(typeInfo.NamedType);
}
else
{
argumentTypeReference = c.TypeInspector.GetTypeRef(
filterType,
TypeContext.Input,
scope);
}
var argumentDefinition = new ArgumentDefinition
{
Name = argumentPlaceholder, Type = argumentTypeReference
};
definition.Arguments.Add(argumentDefinition);
definition.Configurations.Add(
LazyTypeConfigurationBuilder
.New <ObjectFieldDefinition>()
.Definition(definition)
.Configure(
(context, definition) =>
CompileMiddleware(
context,
definition,
argumentTypeReference,
placeholder,
scope))
.On(ApplyConfigurationOn.Completion)
.DependsOn(argumentTypeReference, true)
.Build());
argumentDefinition.Configurations.Add(
LazyTypeConfigurationBuilder
.New <ArgumentDefinition>()
.Definition(argumentDefinition)
.Configure(
(context, argumentDefinition) =>
argumentDefinition.Name =
context.GetFilterConvention(scope).GetArgumentName())
.On(ApplyConfigurationOn.Naming)
.Build());
});
return(descriptor);
}
public static IObjectFieldDescriptor AuthorizeBewit <T>(
this IObjectFieldDescriptor descriptor)
{
return(descriptor
.Use <BewitAuthorizationMiddleware <T> >());
}
private static IObjectFieldDescriptor UseFiltering(
IObjectFieldDescriptor descriptor,
Type?filterType,
ITypeSystemMember?filterTypeInstance = null)
{
FieldMiddleware placeholder =
_ => _ => Task.CompletedTask;
descriptor
.Use(placeholder)
.Extend()
.OnBeforeCreate(definition =>
{
Type?argumentType = filterType;
if (argumentType == null)
{
if (!TypeInspector.Default.TryCreate(
definition.ResultType,
out TypeInfo typeInfo))
{
throw new ArgumentException(
FilterResources.FilterObjectFieldDescriptor_InvalidType,
nameof(descriptor));
}
argumentType = typeof(FilterInputType <>).MakeGenericType(typeInfo.ClrType);
}
ITypeReference argumentTypeReference =
filterTypeInstance is null
? (ITypeReference) new ClrTypeReference(argumentType, TypeContext.Input)
: new SchemaTypeReference(filterTypeInstance);
if (argumentType == typeof(object))
{
throw new SchemaException(
SchemaErrorBuilder.New()
.SetMessage(
FilterResources.FilterObjectFieldDescriptor_InvalidType_Msg)
.SetCode(ErrorCodes.Filtering.FilterObjectType)
.Build());
}
var argumentDefinition = new ArgumentDefinition
{
Type = new ClrTypeReference(argumentType, TypeContext.Input)
};
argumentDefinition.ConfigureArgumentName();
definition.Arguments.Add(argumentDefinition);
ILazyTypeConfiguration lazyConfiguration =
LazyTypeConfigurationBuilder
.New <ObjectFieldDefinition>()
.Definition(definition)
.Configure((context, definition) =>
CompileMiddleware(
context,
definition,
argumentTypeReference,
placeholder))
.On(ApplyConfigurationOn.Completion)
.DependsOn(argumentTypeReference, true)
.Build();
definition.Configurations.Add(lazyConfiguration);
});
return(descriptor);
}
private static IObjectFieldDescriptor UseFiltering(
IObjectFieldDescriptor descriptor,
Type filterType,
ITypeSystemMember filterTypeInstance = null)
{
FieldMiddleware placeholder =
next => context => Task.CompletedTask;
descriptor
.Use(placeholder)
.Extend()
.OnBeforeCreate(definition =>
{
Type argumentType = filterType;
if (filterType == null)
{
if (!TypeInspector.Default.TryCreate(
definition.ResultType, out TypeInfo typeInfo))
{
// TODO : resources
throw new ArgumentException(
"Cannot handle the specified type.",
nameof(descriptor));
}
argumentType =
typeof(FilterInputType <>).MakeGenericType(
typeInfo.ClrType);
}
var argumentTypeReference = filterTypeInstance is null
? (ITypeReference) new ClrTypeReference(
argumentType, TypeContext.Input)
: new SchemaTypeReference(filterTypeInstance);
if (argumentType == typeof(object))
{
// TODO : resources
throw new SchemaException(
SchemaErrorBuilder.New()
.SetMessage(
"The filter type cannot be " +
"infered from `System.Object`.")
.SetCode(ErrorCodes.Filtering.FilterObjectType)
.Build());
}
var argumentDefinition = new ArgumentDefinition();
argumentDefinition.Name = _whereArgumentName;
argumentDefinition.Type = new ClrTypeReference(
argumentType, TypeContext.Input);
definition.Arguments.Add(argumentDefinition);
ILazyTypeConfiguration lazyConfiguration =
LazyTypeConfigurationBuilder
.New <ObjectFieldDefinition>()
.Definition(definition)
.Configure((context, defintion) =>
CompileMiddleware(
context,
definition,
argumentTypeReference,
placeholder))
.On(ApplyConfigurationOn.Completion)
.DependsOn(argumentTypeReference, true)
.Build();
definition.Configurations.Add(lazyConfiguration);
});
return(descriptor);
}
private static IObjectFieldDescriptor UseFiltering(
IObjectFieldDescriptor descriptor,
Type?filterType,
ITypeSystemMember?filterTypeInstance = null)
{
FieldMiddleware placeholder = next => context => default;
string argumentPlaceholder =
"_" + Guid.NewGuid().ToString("N", CultureInfo.InvariantCulture);
descriptor
.Use(placeholder)
.Extend()
.OnBeforeCreate((c, definition) =>
{
Type?argumentType = filterType;
if (argumentType is null)
{
if (definition.ResultType is null ||
definition.ResultType == typeof(object) ||
!c.TypeInspector.TryCreateTypeInfo(
definition.ResultType, out ITypeInfo? typeInfo))
{
throw new ArgumentException(
FilterResources.FilterObjectFieldDescriptor_InvalidType,
nameof(descriptor));
}
argumentType = typeof(FilterInputType <>)
.MakeGenericType(typeInfo.NamedType);
}
ITypeReference argumentTypeReference = filterTypeInstance is null
? (ITypeReference)c.TypeInspector.GetTypeRef(
argumentType,
TypeContext.Input)
: TypeReference.Create(filterTypeInstance);
if (argumentType == typeof(object))
{
throw new SchemaException(
SchemaErrorBuilder.New()
.SetMessage(
FilterResources.FilterObjectFieldDescriptor_InvalidType_Msg)
.SetCode(ErrorCodes.Filtering.FilterObjectType)
.Build());
}
var argumentDefinition = new ArgumentDefinition
{
Name = argumentPlaceholder,
Type = c.TypeInspector.GetTypeRef(argumentType, TypeContext.Input)
};
argumentDefinition.ConfigureArgumentName();
definition.Arguments.Add(argumentDefinition);
ILazyTypeConfiguration lazyConfiguration =
LazyTypeConfigurationBuilder
.New <ObjectFieldDefinition>()
.Definition(definition)
.Configure((context, definition) =>
CompileMiddleware(
context,
definition,
argumentTypeReference,
placeholder))
.On(ApplyConfigurationOn.Completion)
.DependsOn(argumentTypeReference, true)
.Build();
definition.Configurations.Add(lazyConfiguration);
});
return(descriptor);
}
public static IObjectFieldDescriptor UseBewitUrlProtection(
this IObjectFieldDescriptor descriptor)
{
return(descriptor.Use <BewitUrlMiddleware>()
.Type <NonNullType <StringType> >());
}
public static IObjectFieldDescriptor UseSorting(
this IObjectFieldDescriptor descriptor,
Type?sortType,
ITypeSystemMember?sortTypeInstance = null)
{
FieldMiddleware placeholder = next => context => default;
string argumentPlaceholder =
"_" + Guid.NewGuid().ToString("N", CultureInfo.InvariantCulture);
descriptor
.Use(placeholder)
.Extend()
.OnBeforeCreate((c, definition) =>
{
Type argumentType = GetArgumentType(definition, sortType, c.TypeInspector);
ITypeReference argumentTypeReference = sortTypeInstance is null
? (ITypeReference)c.TypeInspector.GetTypeRef(
argumentType,
TypeContext.Input)
: TypeReference.Create(sortTypeInstance);
var argumentDefinition = new ArgumentDefinition
{
Name = argumentPlaceholder,
Type = c.TypeInspector.GetTypeRef(argumentType, TypeContext.Input)
};
ILazyTypeConfiguration lazyArgumentConfiguration =
LazyTypeConfigurationBuilder
.New <ArgumentDefinition>()
.Definition(argumentDefinition)
.Configure((context, definition) =>
{
ISortingNamingConvention convention =
context.DescriptorContext.GetSortingNamingConvention();
definition.Name = convention.ArgumentName;
})
.On(ApplyConfigurationOn.Completion)
.Build();
argumentDefinition.Configurations.Add(lazyArgumentConfiguration);
definition.Arguments.Add(argumentDefinition);
ILazyTypeConfiguration lazyConfiguration =
LazyTypeConfigurationBuilder
.New <ObjectFieldDefinition>()
.Definition(definition)
.Configure((context, definition) =>
CompileMiddleware(
context,
definition,
argumentTypeReference,
placeholder))
.On(ApplyConfigurationOn.Completion)
.DependsOn(argumentTypeReference, true)
.Build();
definition.Configurations.Add(lazyConfiguration);
});
return(descriptor);
}
private static IObjectFieldDescriptor UseSorting(
IObjectFieldDescriptor descriptor,
Type?sortType,
ITypeSystemMember?sortTypeInstance,
string?scope)
{
FieldMiddleware placeholder = next => context => default;
string argumentPlaceholder =
"_" + Guid.NewGuid().ToString("N", CultureInfo.InvariantCulture);
descriptor
.Use(placeholder)
.Extend()
.OnBeforeCreate(
(c, definition) =>
{
Type?argumentType = sortType;
if (argumentType is null)
{
if (definition.ResultType is null ||
definition.ResultType == typeof(object) ||
!c.TypeInspector.TryCreateTypeInfo(
definition.ResultType,
out ITypeInfo? typeInfo))
{
throw new ArgumentException(
SortObjectFieldDescriptorExtensions_UseSorting_CannotHandleType,
nameof(descriptor));
}
argumentType = typeof(SortInputType <>)
.MakeGenericType(typeInfo.NamedType);
}
ITypeReference argumentTypeReference = sortTypeInstance is null
? (ITypeReference)c.TypeInspector.GetTypeRef(
argumentType,
TypeContext.Input,
scope)
: TypeReference.Create(sortTypeInstance, scope);
if (argumentType == typeof(object))
{
throw SortObjectFieldDescriptorExtensions_CannotInfer();
}
argumentType = typeof(ListType <>).MakeGenericType(argumentType);
var argumentDefinition = new ArgumentDefinition
{
Name = argumentPlaceholder,
Type = c.TypeInspector.GetTypeRef(
argumentType,
TypeContext.Input,
scope)
};
definition.Arguments.Add(argumentDefinition);
definition.Configurations.Add(
LazyTypeConfigurationBuilder
.New <ObjectFieldDefinition>()
.Definition(definition)
.Configure(
(context, def) =>
CompileMiddleware(
context,
def,
argumentTypeReference,
placeholder,
scope))
.On(ApplyConfigurationOn.Completion)
.DependsOn(argumentTypeReference, true)
.Build());
definition.Configurations.Add(
LazyTypeConfigurationBuilder
.New <ObjectFieldDefinition>()
.Definition(definition)
.Configure(
(context, _) =>
argumentDefinition.Name =
context.GetSortConvention(scope).GetArgumentName())
.On(ApplyConfigurationOn.Naming)
.Build());
});
return(descriptor);
}
