120 lines
3.7 KiB
Go
120 lines
3.7 KiB
Go
package cli
|
|
|
|
import (
|
|
"flag"
|
|
"fmt"
|
|
"github.com/cyrilix/robocar-base/service"
|
|
MQTT "github.com/eclipse/paho.mqtt.golang"
|
|
"log"
|
|
"os"
|
|
"os/signal"
|
|
"strconv"
|
|
"syscall"
|
|
)
|
|
|
|
func SetDefaultValueFromEnv(value *string, key string, defaultValue string) {
|
|
if os.Getenv(key) != "" {
|
|
*value = os.Getenv(key)
|
|
} else {
|
|
*value = defaultValue
|
|
}
|
|
}
|
|
func SetIntDefaultValueFromEnv(value *int, key string, defaultValue int) error {
|
|
var sVal string
|
|
if os.Getenv(key) != "" {
|
|
sVal = os.Getenv(key)
|
|
val, err := strconv.Atoi(sVal)
|
|
if err != nil {
|
|
log.Printf("unable to convert string to int: %v", err)
|
|
return err
|
|
}
|
|
*value = val
|
|
} else {
|
|
*value = defaultValue
|
|
}
|
|
return nil
|
|
}
|
|
func SetFloat64DefaultValueFromEnv(value *float64, key string, defaultValue float64) error {
|
|
var sVal string
|
|
if os.Getenv(key) != "" {
|
|
sVal = os.Getenv(key)
|
|
val, err := strconv.ParseFloat(sVal, 64)
|
|
if err != nil {
|
|
log.Printf("unable to convert string to float: %v", err)
|
|
return err
|
|
}
|
|
*value = val
|
|
} else {
|
|
*value = defaultValue
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func HandleExit(p service.Part) {
|
|
signals := make(chan os.Signal, 1)
|
|
signal.Notify(signals, os.Kill, os.Interrupt, syscall.SIGTERM)
|
|
|
|
go func() {
|
|
<-signals
|
|
p.Stop()
|
|
os.Exit(0)
|
|
}()
|
|
}
|
|
|
|
func InitMqttFlagSet(flagSet *flag.FlagSet, defaultClientId string, mqttBroker, username, password, clientId *string, mqttQos *int, mqttRetain *bool) {
|
|
SetDefaultValueFromEnv(clientId, "MQTT_CLIENT_ID", defaultClientId)
|
|
SetDefaultValueFromEnv(mqttBroker, "MQTT_BROKER", "tcp://127.0.0.1:1883")
|
|
|
|
flagSet.StringVar(mqttBroker, "mqtt-broker", *mqttBroker, "Broker Uri, use MQTT_BROKER env if arg not set")
|
|
flagSet.StringVar(username, "mqtt-username", os.Getenv("MQTT_USERNAME"), "Broker Username, use MQTT_USERNAME env if arg not set")
|
|
flagSet.StringVar(password, "mqtt-password", os.Getenv("MQTT_PASSWORD"), "Broker Password, MQTT_PASSWORD env if args not set")
|
|
flagSet.StringVar(clientId, "mqtt-client-id", *clientId, "Mqtt client id, use MQTT_CLIENT_ID env if args not set")
|
|
flagSet.IntVar(mqttQos, "mqtt-qos", *mqttQos, "Qos to pusblish message, use MQTT_QOS env if arg not set")
|
|
flagSet.BoolVar(mqttRetain, "mqtt-retain", *mqttRetain, "Retain mqtt message, if not set, true if MQTT_RETAIN env variable is set")
|
|
}
|
|
|
|
func InitMqttFlags(defaultClientId string, mqttBroker, username, password, clientId *string, mqttQos *int, mqttRetain *bool) {
|
|
InitMqttFlagSet(flag.CommandLine, defaultClientId, mqttBroker, username, password, clientId, mqttQos, mqttRetain)
|
|
}
|
|
|
|
func InitIntFlag(key string, defValue int) int {
|
|
var value int
|
|
err := SetIntDefaultValueFromEnv(&value, key, defValue)
|
|
if err != nil {
|
|
log.Panicf("invalid int value: %v", err)
|
|
}
|
|
return value
|
|
}
|
|
|
|
func InitFloat64Flag(key string, defValue float64) float64 {
|
|
var value float64
|
|
err := SetFloat64DefaultValueFromEnv(&value, key, defValue)
|
|
if err != nil {
|
|
log.Panicf("invalid value: %v", err)
|
|
}
|
|
return value
|
|
}
|
|
|
|
func Connect(uri, username, password, clientId string) (MQTT.Client, error) {
|
|
//create a ClientOptions struct setting the broker address, clientid, turn
|
|
//off trace output and set the default message handler
|
|
opts := MQTT.NewClientOptions().AddBroker(uri)
|
|
opts.SetUsername(username)
|
|
opts.SetPassword(password)
|
|
opts.SetClientID(clientId)
|
|
opts.SetAutoReconnect(true)
|
|
opts.SetDefaultPublishHandler(
|
|
//define a function for the default message handler
|
|
func(client MQTT.Client, msg MQTT.Message) {
|
|
fmt.Printf("TOPIC: %s\n", msg.Topic())
|
|
fmt.Printf("MSG: %s\n", msg.Payload())
|
|
})
|
|
|
|
//create and start a client using the above ClientOptions
|
|
client := MQTT.NewClient(opts)
|
|
if token := client.Connect(); token.Wait() && token.Error() != nil {
|
|
return nil, fmt.Errorf("unable to connect to mqtt bus: %v", token.Error())
|
|
}
|
|
return client, nil
|
|
}
|