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main.go
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main.go
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package main
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io"
"log"
"net"
"strconv"
"strings"
"text/template"
"time"
MQTT "github.com/eclipse/paho.mqtt.golang"
"github.com/fsnotify/fsnotify"
"github.com/hnesland/telldusmq/tellduscore"
"github.com/spf13/viper"
)
// TelldusEvent describes telldus events ..
type TelldusEvent struct {
Class string
Protocol string
Model string
Code string
House string
Unit string
Group string
Method string
Id string
Temp string
Humidity string
Value string
DataType string
}
// TellstickMQTTBrokerEvent describes incoming events on MQTT
type TellstickMQTTBrokerEvent struct {
Protocol string `json:"protocol"`
DeviceID int `json:"device_id"`
House uint `json:"house"`
Unit int `json:"unit"`
Method string `json:"method"`
Level int `json:"level"`
}
var mqttClient MQTT.Client
var telldusSocket net.Conn
// readTelldusRawDeviceEvents reads from Telldus unix socket and parses the raw event strings in rawTelldusEvent()
func readTelldusRawDeviceEvents(errCh chan error) {
buf := make([]byte, 1024)
for {
if telldusSocket != nil {
n, err := telldusSocket.Read(buf[:])
if err != nil {
log.Printf("read error: %q", err)
errCh <- err
return
}
telldusEventString := string(buf[0:n])
if strings.Contains(telldusEventString, "TDRawDeviceEvent") {
classBegins := strings.Index(telldusEventString, "class")
str := buf[classBegins : n-3]
rawTelldusEvent(string(str))
}
} else {
errCh <- errors.New("socket not available")
return
}
}
}
// sendTelldusDeviceEvent transmits a telldus-event to the client unix socket.
func sendTelldusDeviceEvent(message string) string {
tellstickClientUnixSocket := viper.GetString("Tellstick.UnixSocketClient")
if tellstickClientUnixSocket == "" {
tellstickClientUnixSocket = "/tmp/TelldusClient"
}
clientSocket, err := net.Dial("unix", tellstickClientUnixSocket)
if err != nil {
return ""
}
clientSocket.Write([]byte(message))
buf := make([]byte, 1024)
n, err := clientSocket.Read(buf[:])
telldusResult := string(buf[0:n])
return telldusResult
}
// setupTelldus initializes the event unix socket from telldus
func setupTelldus() {
errCh := make(chan error)
tellstickEventsUnixSocket := viper.GetString("Tellstick.UnixSocketEvents")
if tellstickEventsUnixSocket == "" {
tellstickEventsUnixSocket = "/tmp/TelldusEvents"
}
for {
log.Printf("Connecting to Telldusd Events Socket\n")
var err error
telldusSocket, err = net.Dial("unix", tellstickEventsUnixSocket)
go readTelldusRawDeviceEvents(errCh)
err = <-errCh
if err != nil {
log.Printf("Telldusd connection error: %q: Please verify that '%s' is readable. Retry in 5 sec ..\n", err, tellstickEventsUnixSocket)
}
time.Sleep(5 * time.Second)
}
}
func rawTelldusEvent(str string) {
data := strings.Split(str, ";")
event := &TelldusEvent{
Id: "0",
House: "0",
Unit: "0",
Code: "0",
Group: "0",
Temp: "0",
Humidity: "0",
Method: "0",
Value: "0",
DataType: ""}
for _, elm := range data {
if len(elm) != 0 {
propval := strings.Split(elm, ":")
switch propval[0] {
case "class":
event.Class = propval[1]
break
case "protocol":
event.Protocol = propval[1]
break
case "model":
event.Model = propval[1]
break
case "code":
event.Code = propval[1]
break
case "house":
event.House = propval[1]
break
case "unit":
event.Unit = propval[1]
break
case "group":
event.Group = propval[1]
break
case "method":
event.Method = propval[1]
break
case "id":
event.Id = propval[1]
break
case "temp":
event.Temp = propval[1]
break
case "humidity":
event.Humidity = propval[1]
break
}
} else {
var topicTemplate string
var payloadTemplate string
if event.Class == "command" {
topicTemplate = viper.GetString("Mqtt.Events.PublishTopic")
payloadTemplate = viper.GetString("Mqtt.Events.PublishPayload")
turnOn := viper.GetString("Tellstick.MapTurnOnTo")
turnOff := viper.GetString("Tellstick.MapTurnOffTo")
if len(turnOn) > 0 && event.Method == "turnon" {
event.Method = turnOn
}
if len(turnOff) > 0 && event.Method == "turnoff" {
event.Method = turnOff
}
} else {
topicTemplate = viper.GetString("Mqtt.Sensors.PublishTopic")
payloadTemplate = viper.GetString("Mqtt.Sensors.PublishPayload")
event.Value = event.Temp
event.DataType = "temp"
}
var topicString string
var payloadString string
topicString = parseTemplate(topicTemplate, event)
payloadString = parseTemplate(payloadTemplate, event)
var token MQTT.Token
log.Printf("Publish to '%s' with '%s'\n", topicString, payloadString)
token = mqttClient.Publish(topicString, 0, false, payloadString)
token.Wait()
// Send a duplicate event for humidity
if viper.GetBool("Tellstick.SplitTemperatureAndHumidity") && event.Class == "sensor" {
event.DataType = "humidity"
event.Value = event.Humidity
topicString = parseTemplate(topicTemplate, event)
payloadString = parseTemplate(payloadTemplate, event)
log.Printf("Publish to '%s' with '%s'\n", topicString, payloadString)
token = mqttClient.Publish(topicString, 0, false, payloadString)
token.Wait()
}
}
}
}
func handleTelldusDeviceIDEvent(event TellstickMQTTBrokerEvent) {
var result int
if viper.GetBool("Tellstick.ReverseMappingOnIncoming") {
turnOn := viper.GetString("Tellstick.MapTurnOnTo")
turnOff := viper.GetString("Tellstick.MapTurnOffTo")
if len(turnOn) > 0 && event.Method == turnOn {
event.Method = "turnon"
}
if len(turnOff) > 0 && event.Method == turnOff {
event.Method = "turnoff"
}
}
switch event.Method {
case tellduscore.TellstickTurnoffString:
if telldusSocket != nil {
result = tellduscore.GetIntFromResult(sendTelldusDeviceEvent(tellduscore.GetTellstickMessage("tdTurnOff", event.DeviceID)))
}
log.Printf("Tellstick turn off: %s (%d)\n", tellduscore.GetResultMessage(result), result)
break
case tellduscore.TellstickTurnonString:
if telldusSocket != nil {
result = tellduscore.GetIntFromResult(sendTelldusDeviceEvent(tellduscore.GetTellstickMessage("tdTurnOn", event.DeviceID)))
}
log.Printf("Tellstick turn on: %s (%d)\n", tellduscore.GetResultMessage(result), result)
break
case tellduscore.TellstickLearnString:
if telldusSocket != nil {
result = tellduscore.GetIntFromResult(sendTelldusDeviceEvent(tellduscore.GetTellstickMessage("tdLearn", event.DeviceID)))
}
log.Printf("Tellstick learn: %s (%d)\n", tellduscore.GetResultMessage(result), result)
break
case tellduscore.TellstickDimString:
if telldusSocket != nil {
result = tellduscore.GetIntFromResult(sendTelldusDeviceEvent(tellduscore.GetTellstickMessageLevel("tdDim", event.DeviceID, event.Level)))
}
log.Printf("Tellstick dim: %s (%d)\n", tellduscore.GetResultMessage(result), result)
break
default:
log.Printf("Unknown tellstick method: %s\n", event.Method)
}
}
func onMessageReceived(client MQTT.Client, message MQTT.Message) {
//log.Printf("Received message on topic: %s\nMessage: %s\n", message.Topic(), message.Payload())
var event TellstickMQTTBrokerEvent
err := json.Unmarshal(message.Payload(), &event)
if err != nil {
fmt.Println("error:", err)
}
log.Printf("Transmit event requested: %+v\n", event)
if event.Protocol == "telldusdevice" {
handleTelldusDeviceIDEvent(event)
return
}
/*
if event.Protocol != "archtech" {
log.Printf("Unsupported protocol: %s\n", event.Protocol)
return
}
method := 0
switch event.Method {
case tellduscore.TellstickTurnoffString:
method = tellduscore.TellstickTurnoff
break
case tellduscore.TellstickTurnonString:
method = tellduscore.TellstickTurnon
break
case tellduscore.TellstickDimString:
method = tellduscore.TellstickDim
break
}
rawCommand := tellduscore.GetRawCommand(event.House, event.Unit, method, event.Level)
log.Printf("Translated to: %02X\n", rawCommand)
tellResult := C.tdSendRawCommand(C.CString(rawCommand), 0)
if tellResult != 0 { // !TELLSTICK_SUCCESS
resultType := tellduscore.GetResultMessage(int(tellResult))
log.Printf("Error transmitting command: (%d) %s", tellResult, resultType)
} else {
log.Println("Tellstick reports success.")
}
*/
}
func onTellstickDeviceMessageReceived(client MQTT.Client, message MQTT.Message) {
topic := message.Topic()
topicElements := strings.Split(topic, "/")
deviceIDString := topicElements[len(topicElements)-1]
deviceID, err := strconv.Atoi(deviceIDString)
if err != nil {
log.Fatalf("Error parsing device id '%s': %v\n", deviceIDString, err)
return
}
event := TellstickMQTTBrokerEvent{
DeviceID: deviceID,
Method: string(message.Payload()),
Protocol: "telldusdevice"}
if event.Method == tellduscore.TellstickDimString {
dimLevelString := string(message.Payload())
dimLevel, err := strconv.Atoi(dimLevelString)
if err != nil {
log.Fatalf("Error parsing dim level '%s': %v\n", dimLevelString, err)
return
}
event.Level = dimLevel
}
handleTelldusDeviceIDEvent(event)
}
func parseTemplate(templateString string, event *TelldusEvent) string {
tmpl, err := template.New("template").Parse(templateString)
if err != nil {
log.Panicf("Error parsing template: %v", err)
}
var tmplBuffer bytes.Buffer
tmplWriter := io.Writer(&tmplBuffer)
err = tmpl.Execute(tmplWriter, event)
if err != nil {
log.Panicf("Error executing template: %v", err)
}
return tmplBuffer.String()
}
func setupMqtt() {
opts := MQTT.NewClientOptions()
opts.AddBroker(viper.GetString("Mqtt.Broker"))
opts.SetClientID(viper.GetString("Mqtt.ClientId"))
opts.SetUsername(viper.GetString("Mqtt.Username"))
opts.SetPassword(viper.GetString("Mqtt.Password"))
topic := viper.GetString("Mqtt.Events.SubscribeTopic")
deviceTopic := viper.GetString("Mqtt.Events.SubscribeDeviceEvents")
qos := 0
opts.OnConnect = func(c MQTT.Client) {
log.Printf("Subscribing to: %s\n", topic)
if token := c.Subscribe(topic, byte(qos), onMessageReceived); token.Wait() && token.Error() != nil {
log.Panicf("Unable to subscribe to topic: %v", token.Error())
}
log.Printf("Subscribing to: %s\n", deviceTopic)
if token := c.Subscribe(deviceTopic, byte(qos), onTellstickDeviceMessageReceived); token.Wait() && token.Error() != nil {
log.Panicf("Unable to subscribe to topic: %v", token.Error())
}
}
mqttClient = MQTT.NewClient(opts)
if token := mqttClient.Connect(); token.Wait() && token.Error() != nil {
log.Panicf("Unable to connect to MQTT: %v", token.Error())
}
}
func setupConfiguration() {
viper.SetConfigName("telldusmq")
viper.AddConfigPath("/etc/telldusmq/")
viper.AddConfigPath("$HOME/.telldusmq/")
viper.AddConfigPath("./")
configError := viper.ReadInConfig()
if configError != nil {
log.Panicf("Error reading configuration: %v\n", configError)
}
viper.WatchConfig()
viper.OnConfigChange(func(e fsnotify.Event) {
log.Println("Reloading configuration", e.Name)
// TODO: Reconnect mqtt broker if connection params changes?
})
}
func main() {
log.Println("Started Message Queue for Telldus Core")
setupConfiguration()
setupMqtt()
go setupTelldus()
for {
time.Sleep(30 * time.Second)
}
}