public void Register(ApiSchema schema)
{
var methods = typeof(TInterface).GetMethods(BindingFlags.DeclaredOnly | BindingFlags.Instance | BindingFlags.Public);
foreach (var methodInfo in methods)
{
if (methodInfo.Name == nameof(IOperation.Register))
{
continue;
}
var isQuery = methodInfo.CustomAttributes.Any(a => a.AttributeType == typeof(QueryAttribute));
var isMutation = methodInfo.CustomAttributes.Any(a => a.AttributeType == typeof(MutationAttribute));
if (!isQuery && !isMutation)
{
isQuery = true;
}
var apiOperation = isQuery ? schema.Query : schema.Mutation;
var parameters = methodInfo.GetParameters();
if (parameters.Length != 1)
{
throw new GraphException($"An operation method must have one input parameter. Operation: {typeof(TInterface).Name}.{methodInfo.Name}");
}
var fieldName = methodInfo.Name.ToCamelCase();
var fieldDescription = "";
var queryArguments = GraphArguments.FromModel(parameters[0].ParameterType).GetQueryArguments();
// Add function as operation
var returnType = TypeLoader.GetBaseType(methodInfo.ReturnType, out bool isList);
schema.MapOutput(returnType, autoMapChildren: true, overwriteMap: false);
var graphType = TypeLoader.GetGraphType(methodInfo.ReturnType);
apiOperation.Field(graphType, fieldName, fieldDescription, queryArguments, context =>
{
var inputModel = ApiOperation.GetInputFromContext(context, parameters[0].ParameterType);
ValidationError.ValidateObject(inputModel);
var operationValues = new OperationValues()
{
Context = context,
FieldName = fieldName,
Fields = new InputField[0],
FunctionAttributes = methodInfo.GetCustomAttributes(true).OfType <Attribute>().ToArray(),
Input = inputModel,
};
operationValues = schema.Container.GetInstance <ApiSchema>().RunOperationFilters(OperationFilterType.Pre, operationValues);
var graphClient = GetGraphClient();
var query = graphClient.AddSelectionQuery(fieldName, inputModel, context.FieldAst.SelectionSet.Selections.OfType <Field>());
var graphOutput = isQuery ? graphClient.RunQueries() : graphClient.RunMutations();
if (graphOutput.HasErrors)
{
graphOutput.ThrowErrors();
}
operationValues.Output = query.Data.ToObject(methodInfo.ReturnType);
if (PostOperations.ContainsKey(fieldName))
{
operationValues.Output = PostOperations[fieldName](context, fieldName, operationValues.Output);
}
operationValues = schema.Container.GetInstance <ApiSchema>().RunOperationFilters(OperationFilterType.Post, operationValues);
return(operationValues.Output);
});
}
}