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hocon.go
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hocon.go
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package hocon
import (
"context"
"encoding/json"
"errors"
"fmt"
"net"
gen "github.com/LeKovr/hocon/zgen/go/proto"
)
type Config struct {
}
const (
port = ":38899"
CmdSet = "setPilot"
CmdGet = "getPilot"
OffSceneID = 0
)
// TODO: set this in config
var scene = map[gen.LampScene]int{
gen.LampScene_OFF: OffSceneID,
gen.LampScene_DAY: 12,
gen.LampScene_NIGHT: 14,
}
type Params struct {
State bool `json:"state"`
SceneID int `json:"sceneId,omitempty"`
SceneKey string `json:"sceneKey,omitempty"`
}
type Command struct {
Method string `json:"method"`
Params Params `json:"params"`
}
type Result struct {
Params
Success bool `json:"success,omitempty"`
}
type ResultEnvelope struct {
Method string `json:"method"`
Result Result `json:"result"`
}
type HoconServiceImpl struct {
gen.UnimplementedHoconServiceServer
}
func New(cfg Config) *HoconServiceImpl {
return &HoconServiceImpl{}
}
func (srv HoconServiceImpl) LampControl(ctx context.Context, cmd *gen.LampStatus) (rv *gen.LampStatus, err error) {
fmt.Printf("CALL: %s / %d\n", cmd.Id, cmd.Scene)
var scene *gen.LampScene
scene, err = run(cmd.Id, cmd.Scene)
if err != nil {
return nil, err
}
cmd.Scene = *scene
return cmd, nil
}
func run(lamp string, key gen.LampScene) (*gen.LampScene, error) {
var cmd Command
if key == gen.LampScene_UNKNOWN {
cmd = Command{Method: CmdGet}
} else {
id, ok := scene[key]
if !ok {
fmt.Println("Unknown scene:", key)
return nil, errors.New("Unknown scene:")
}
cmd = Command{Method: CmdSet}
if id != OffSceneID {
cmd.Params.State = true
cmd.Params.SceneID = id
}
}
out, err := json.Marshal(cmd)
if err != nil {
fmt.Println("json error:", err)
return nil, errors.New("json error")
}
fmt.Println("Send:", string(out))
rv, err := send(lamp+port, out)
if err != nil {
fmt.Println("Resolve:", err)
return nil, errors.New("resolve")
}
var res ResultEnvelope
err = json.Unmarshal(rv, &res)
if err != nil {
fmt.Println("Result:", err)
return nil, errors.New("unmarshal")
}
if cmd.Method == CmdSet {
// fill empty response fields
res.Result.Params.SceneID = cmd.Params.SceneID
res.Result.Params.State = cmd.Params.State
}
// fmt.Printf("OK: %v\n", res.Result.Success)
// } else {
if !res.Result.Params.State {
res.Result.Params.SceneKey = "off"
key = gen.LampScene_OFF
} else {
for k, v := range scene {
if res.Result.Params.SceneID == v {
res.Result.Params.SceneKey = gen.LampScene(k).String()
key = gen.LampScene(k)
break
}
}
}
fmt.Printf("Status: %+v\n", res.Result.Params)
// }
return &key, nil
}
func send(host string, cmd []byte) (rv []byte, err error) {
var s *net.UDPAddr
s, err = net.ResolveUDPAddr("udp4", host)
if err != nil {
return
}
var conn *net.UDPConn
conn, err = net.DialUDP("udp4", nil, s)
if err != nil {
return
}
//fmt.Printf("The UDP server is %s\n", conn.RemoteAddr().String())
defer conn.Close()
_, err = conn.Write(append(cmd, []byte("\n")...))
if err != nil {
return
}
buffer := make([]byte, 1024)
n, _, err := conn.ReadFromUDP(buffer)
if err != nil {
return
}
// return string(buffer[0:n]), nil
return buffer[0:n], nil
}