package api import "local/m/mchess_server/types" type WebsocketMessage struct { Type MessageType `json:"messageType"` Move *types.Move `json:"move,omitempty"` Color *Color `json:"color,omitempty"` } type MessageType string const ( MoveMessage MessageType = "move" ColorDetermined MessageType = "colorDetermined" ) type Color string const ( Black Color = "black" White Color = "white" ) func (m WebsocketMessage) IsValidMove() bool { if m.Type != MoveMessage { return false } if m.Move == nil { return false } return true }