public virtual void RegisterCommands(IEnumerable <Type> commandHandlerTypes)
{
foreach (var commandHandlerType in commandHandlerTypes)
{
var genericType = commandHandlerType.GetInterfaces().Single(x => x.GetTypeInfo().IsAssignableToGenericType(typeof(ICommandHandler <,>)) ||
x.GetTypeInfo().IsAssignableToGenericType(typeof(IAsyncCommandHandler <,>)));
var genericArguments = genericType.GetGenericArguments();
var commandType = genericArguments[0];
var queryResultType = genericArguments[1];
var resultType = genericArguments[1];
if (commandType.GetCustomAttribute <ExposeGraphQLAttribute>() == null)
{
continue;
}
var isCollection = resultType != typeof(string) && typeof(IEnumerable).IsAssignableFrom(resultType);
if (isCollection)
{
resultType = resultType.GetGenericArguments()[0];
}
var descriptionAttribute = commandType.GetCustomAttribute <DescriptionAttribute>();
var exposeAttribute = commandType.GetCustomAttribute <ExposeGraphQLAttribute>();
var authorizeAttribute = commandType.GetCustomAttribute <AuthorizeAttribute>();
if (exposeAttribute == null)
{
continue;
}
IInputObjectGraphType inputGqlType = null;
var properties = commandType.GetProperties(BindingFlags.Instance | BindingFlags.Public).Where(x => !typeof(IResolveFieldContext).IsAssignableFrom(x.PropertyType)).ToList();
if (properties.Any())
{
var inputObjectType = typeof(AutoInputGraphType <>).MakeGenericType(commandType);
inputGqlType = (IInputObjectGraphType)_container.GetInstance(inputObjectType);
inputGqlType.Description = descriptionAttribute?.Description;
}
IGraphType resultGqlType = null;
if (!_typeCache.ContainsKey(queryResultType) && !BuiltInTypeMappings.Any(x => x.clrType == resultType) && !TypeMappings.Any(x => x.clrType == resultType))
{
var resultTypeName = resultType.Name;
var returnObjectType = typeof(AutoObjectGraphType <>).MakeGenericType(resultType);
resultGqlType = (IGraphType)_container.GetInstance(returnObjectType);
resultGqlType.Name = resultTypeName;
ListGraphType listGqlType = null;
if (isCollection)
{
var name = resultGqlType.Name;
listGqlType = (ListGraphType)Activator.CreateInstance(typeof(ListGraphType <>).MakeGenericType(returnObjectType), null);
listGqlType.ResolvedType = resultGqlType;
resultGqlType = (IGraphType)listGqlType;
// resultGqlType.Name = "ListOf" + name;
}
RegisterTypeMapping(resultType, returnObjectType);
}
else if (_typeCache.ContainsKey(queryResultType))
{
resultGqlType = _typeCache[queryResultType];
}
var arguments = new List <QueryArgument>();
if (inputGqlType != null)
{
var argument = AllowNullCommand ? new QueryArgument(inputGqlType) : new QueryArgument(new NonNullGraphType(inputGqlType));
argument.Name = "command";
arguments.Add(argument);
}
var mutationName = exposeAttribute.IsFieldNameSet ? exposeAttribute.FieldName : _commandNameSuffixRegex.Replace(commandType.Name, string.Empty);
if (!Mutation.HasField(mutationName))
{
var type = new FieldType
{
Type = resultGqlType == null?BuiltInTypeMappings.Where(x => x.clrType == resultType).Select(x => x.graphType).SingleOrDefault() ?? TypeMappings.Where(x => x.clrType == resultType).Select(x => x.graphType).SingleOrDefault() : null,
ResolvedType = resultGqlType,
Resolver = new CommandResolver(_container, commandHandlerType, commandType, resultType, GetJsonSerializerSettings()),
Name = GetNormalizedFieldName(mutationName),
Description = descriptionAttribute?.Description,
Arguments = new QueryArguments(arguments)
};
type.Metadata[GraphQLExtensions.PermissionsKey] = authorizeAttribute?.Permissions?.ToList();
Mutation.AddField(type);
}
}
}
