// new FuncFieldResolver<object>(c => GraphQlHelpers.GetFinalValue(property.GetValue(GraphQlHelpers.GetSourceInstance(c, type, false))))
private static IObservable <object> Subscribe(ResolveEventStreamContext c, PropertyInfo property, Type type)
{
var observable = property.GetValue(GraphQlHelpers.GetSourceInstance(c, type, true));
return(observable as IObservable <object>);
}
public DynamicGraphType(IGraphQlTypePool graphTypePool, Type type, bool isRoot = false)
{
if (!type.IsClass || type.IsInterface)
{
throw new ArgumentException("Invalid object type");
}
// get the name
var nameAttr = type.GetAttribute <NameAttribute>();
var descAttr = type.GetAttribute <DescriptionAttribute>();
// set type name and description
Name = nameAttr?.Name ?? type.Name;
Description = descAttr?.Description ?? DocXmlHelper.DocReader.GetTypeComments(type).Summary;
// set the type metadata
Metadata["type"] = type;
{
// sets the custom metadatas
var metadatas = Attribute.GetCustomAttributes(type, typeof(MetadataAttribute));
foreach (MetadataAttribute metadata in metadatas)
{
Metadata[metadata.Key] = metadata.Value;
}
}
// Check for interfaces
var interfaces = type.GetNotDerivedInterfaces();
// Add all the interface that this implement
foreach (var intrfce in interfaces)
{
AddResolvedInterface(graphTypePool.GetGraphType(intrfce) as IInterfaceGraphType);
}
// Implementing isTypeOf in the case this type implement an interface
IsTypeOf = obj => obj.GetType() == type;
// Generate fields -----------------------------------------------
// start with the properties
var properties = type
// Get all properties with getters
.GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.SetProperty | BindingFlags.GetProperty)
// ignore the ones that have the ignore attribute
.Where(x => x.GetAttribute <IgnoreAttribute>() == null);
foreach (var property in properties)
{
var graphType = graphTypePool.GetGraphType(property.PropertyType);
var descriptionAttr = property.GetAttribute <DescriptionAttribute>();
var fieldNameAttr = property.GetAttribute <NameAttribute>();
var isNonNull = property.GetAttribute <NonNullAttribute>() != null;
// create field
var field = new FieldType()
{
Name = fieldNameAttr == null ? property.Name : fieldNameAttr.Name,
Description = descriptionAttr?.Description ?? DocXmlHelper.DocReader.GetMemberComments(property).Summary,
ResolvedType = isNonNull ? new NonNullGraphType(graphType) : graphType,
Resolver = new FuncFieldResolver <object>(c => GraphQlHelpers.GetFinalValue(property.GetValue(GraphQlHelpers.GetSourceInstance(c, type, isRoot)))),
};
// add the .net type of this field in the metadata
field.Metadata["type"] = property;
var metadatas = Attribute.GetCustomAttributes(type, typeof(MetadataAttribute));
foreach (MetadataAttribute metadata in metadatas)
{
Metadata[metadata.Key] = metadata.Value;
}
AddField(field);
}
// work with the methods
var methods = type.GetMethods(BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly)
.Where(x => x.GetAttribute <IgnoreAttribute>() == null);
// for each method public
foreach (var method in methods)
{
if (method.Name == nameof(GraphNodeType <object> .OnCreateAsync) ||
method.IsSpecialName)
{
continue;
}
var descriptionAttr = method.GetAttribute <DescriptionAttribute>();
var fieldNameAttr = method.GetAttribute <NameAttribute>();
IGraphType graphType;
IFieldResolver resolver;
if (method.ReturnType.IsGenericType && method.ReturnType.GetGenericTypeDefinition() == typeof(Task <>))
{
var awaitableReturnType = method.ReturnType.GetGenericArguments()[0];
graphType = graphTypePool.GetGraphType(awaitableReturnType);
resolver = new AsyncFieldResolver <object>(async c =>
{
var task = GraphQlHelpers.ExecuteResolverFunction(method, c, type, isRoot);
await((Task)task);
var resultProp = task.GetType().GetProperty(nameof(Task <object> .Result));
var result = resultProp.GetValue(task);
return(result);
});
}
else
{
graphType = graphTypePool.GetGraphType(method.ReturnType);
resolver = new FuncFieldResolver <object>(c => GraphQlHelpers.ExecuteResolverFunction(method, c, type, isRoot));
}
var isNonNull = method.GetAttribute <NonNullAttribute>() != null;
// create field
var field = new FieldType()
{
Arguments = GraphQlHelpers.GetArguments(graphTypePool, method),
Name = fieldNameAttr == null ? method.Name : fieldNameAttr.Name,
Description = descriptionAttr?.Description ?? DocXmlHelper.DocReader.GetMemberComments(method).Summary,
ResolvedType = isNonNull ? new NonNullGraphType(graphType) : graphType,
Resolver = resolver
};
// add the .net type of this field in the metadata
field.Metadata["type"] = method;
var metadatas = Attribute.GetCustomAttributes(type, typeof(MetadataAttribute));
foreach (MetadataAttribute metadata in metadatas)
{
Metadata[metadata.Key] = metadata.Value;
}
AddField(field);
}
}
