private FluentActionValidationResult ValidateFluentActionForBuilding(FluentActionBase fluentAction)
{
if (fluentAction == null)
{
throw new ArgumentNullException(nameof(fluentAction));
}
var validationResult = new FluentActionValidationResult
{
Valid = true,
ValidationErrorMessages = new List<string>()
};
if (fluentAction.Definition == null)
{
validationResult.AddValidationError($"{nameof(fluentAction.Definition)} is null.");
return validationResult;
}
if (fluentAction.Definition.Handlers == null)
{
validationResult.AddValidationError($"{nameof(fluentAction.Definition.Handlers)} is null.");
return validationResult;
}
var handlers = fluentAction.Definition.Handlers;
if (!handlers.Any())
{
validationResult.AddValidationError("At least one handler is required.");
}
foreach (var handlerWithNoReturnType in handlers.Where(handler =>
handler.Type != FluentActionHandlerType.Action &&
handler.ReturnType == null))
{
validationResult.AddValidationError("Missing return type for handler.");
}
if (handlers.Any() && handlers.Last().Type == FluentActionHandlerType.Action)
{
validationResult.AddValidationError("Cannot end a fluent action with a Do statement.");
}
return validationResult;
}
public FluentActionControllerDefinition Build(FluentActionBase fluentAction, ILogger logger = null)
{
if (fluentAction == null)
{
throw new ArgumentNullException(nameof(fluentAction));
}
var validationResult = ValidateFluentActionForBuilding(fluentAction);
if (!validationResult.Valid)
{
throw new FluentActionValidationException($"Could not validate fluent action {fluentAction}: {validationResult}");
}
if (fluentAction.Definition.IsMapRoute)
{
var handler = fluentAction.Definition.Handlers.First();
if (handler.Expression == null)
{
throw new ArgumentException(
$"Missing action expression for {fluentAction}.");
}
if (!(handler.Expression.Body is MethodCallExpression))
{
throw new ArgumentException(
$"Expression for {fluentAction} must be a single method call expression.");
}
var method = ((MethodCallExpression)handler.Expression.Body).Method;
var controllerTypeInfo = method.DeclaringType.GetTypeInfo();
if (!typeof(Controller).IsAssignableFrom(controllerTypeInfo.UnderlyingSystemType))
{
throw new ArgumentException(
$"Method call for {fluentAction} must come from a controller.");
}
var guid = Guid.NewGuid().ToString().Without("-");
return new FluentActionControllerDefinition()
{
Id = controllerTypeInfo.Name + "_" + method.Name + "_" + guid,
Name = controllerTypeInfo.Name,
ActionName = method.Name,
FluentAction = fluentAction,
TypeInfo = controllerTypeInfo
};
} else
{
if (
(
fluentAction.Definition.GroupName != null ||
fluentAction.Definition.IgnoreApi == true
) &&
fluentAction.Definition.CustomAttributes.All(ca => ca.Type != typeof(ApiExplorerSettingsAttribute))
)
{
var nonNullableProperties = new Dictionary<string, object>()
{
{ "GroupName", fluentAction.Definition.GroupName },
{ "IgnoreApi", fluentAction.Definition.IgnoreApi },
}
.Where(pair => pair.Value != null)
.ToList();
var apiExplorerSettingsAttributeType = typeof(ApiExplorerSettingsAttribute);
fluentAction.Definition.CustomAttributes.Add(new FluentActionCustomAttribute
{
Type = apiExplorerSettingsAttributeType,
Constructor = apiExplorerSettingsAttributeType.GetConstructor(new Type[0]),
ConstructorArgs = new object[0],
NamedProperties = nonNullableProperties.Select(p => apiExplorerSettingsAttributeType.GetProperty(p.Key)).ToArray(),
PropertyValues = nonNullableProperties.Select(p => p.Value).ToArray(),
NamedFields = new FieldInfo[0],
FieldValues = new object[0],
});
}
try
{
var controllerTypeInfo = DefineControllerType(fluentAction.Definition, logger);
return new FluentActionControllerDefinition()
{
Id = controllerTypeInfo.Name,
Name = controllerTypeInfo.Name,
ActionName = ActionName,
FluentAction = fluentAction,
TypeInfo = controllerTypeInfo
};
} catch (Exception buildException)
{
throw new Exception($"Could not build controller type for {fluentAction}: {buildException.Message}", buildException);
}
}
}