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package m4p
import (
"bytes"
"encoding/json"
)
type MessageType string
// MessageType enums.
const (
Magic4PCAdMessage MessageType = "magic4pc_ad"
SubSensorMessage MessageType = "sub_sensor"
RemoteUpdateMessage MessageType = "remote_update"
InputMessage MessageType = "input"
KeepAliveMessage MessageType = "keepalive"
)
// Message format sent over the wire.
type Message struct {
Type MessageType `json:"t"`
Version int `json:"version"`
*DeviceInfo
*Register
*RemoteUpdate
*Input
}
// NewMessage initializes a message with the type and protocol version.
func NewMessage(typ MessageType) Message {
return Message{
Type: typ,
Version: protocolVersion,
}
}
// DeviceInfo represents a magic4pc server.
type DeviceInfo struct {
Model string `json:"model"`
IPAddr string `json:"-"`
Port int `json:"port"`
MAC string `json:"mac"`
}
// Register payload for registering a new client on the server.
type Register struct {
UpdateFrequency int `json:"updateFreq"`
Filter []string `json:"filter"`
}
// Input event (key pressed).
type Input struct {
Parameters struct {
KeyCode int `json:"keyCode"`
IsDown bool `json:"isDown"`
} `json:"parameters"`
}
// RemoteUpdate event, sensor data from the magic remote.
type RemoteUpdate struct {
// filters []string
Payload []byte `json:"payload"`
}
// type (
// ReturnValue uint8
// DeviceID uint8
// Coordinates struct{ X, Y int32 }
// Gyroscope struct{ X, Y, Z float32 }
// Acceleration struct{ X, Y, Z float32 }
// Quaternion struct{ Q0, Q1, Q2, Q3 float32 }
// )
// func (ru RemoteUpdate) Coordinates() Coordinates {
// return Coordinates{}
// }
// func (ru RemoteUpdate) Acceleration() Acceleration {
// return Acceleration{}
// }
func decode(b []byte) (Message, error) {
var m Message
dec := json.NewDecoder(bytes.NewReader(b))
dec.DisallowUnknownFields()
if err := dec.Decode(&m); err != nil {
return Message{}, err
}
return m, nil
}
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