Prepare for storing device data in database

- create device id from mqtt topic
- implement method for storing device in database

Still todo:
- extract other data (e.g. MAC, SN) from monitoring object
- find a way in mqtt to use global env

mqtt/mqtt.go

@@ -7,10 +7,12 @@ import (
 	"log"
 	"net/url"
 	"strconv"
+	"strings"
 
 	MQTT "github.com/eclipse/paho.mqtt.golang"
 	//"os"
 	"mqttListener/Config"
+	"mqttListener/models"
 	"regexp"
 	"time"
 )
@@ -124,9 +126,11 @@ var subscriptionHandler = func(client MQTT.Client, msg MQTT.Message) {
 	fmt.Printf("MSG: \n%s\n", msg.Payload())
 	//fmt.Printf("* [%s] %s\n", msg.Topic(), string(msg.Payload()))
 
-	regexpWithType := "\\/ATB\\/[A-Z]+\\/[0-9]+\\/[0-9]+\\/[0-9]+\\/[0-9]+\\/mo"
+	regexpWithType := "\\/ATB\\/[A-Z]+\\/[0-9]+\\/[0-9]+\\/mo"
 	regexpDefault := "\\/ATB\\/[0-9]+\\/[0-9]+\\/[0-9]+\\/[0-9]+\\/mo"
 
+	topicSlice := strings.Split(msg.Topic(), "/")
+
 	matchedWithType, err := regexp.MatchString(regexpWithType, msg.Topic())
 	if err != nil {
 		log.Printf("ERROR: matchedWithType: %s", err.Error())
@@ -136,11 +140,25 @@ var subscriptionHandler = func(client MQTT.Client, msg MQTT.Message) {
 		log.Printf("ERROR: matchedDefault: %s", err.Error())
 	}
 
+	var deviceID string
 	if matchedWithType {
 		fmt.Printf("Topic matched regexpWithType\n")
+		deviceID = topicSlice[2] + "_" + topicSlice[3] + "_" + topicSlice[4]
 	} else if matchedDefault {
 		fmt.Printf("Topic matched regexpDefault\n")
+		deviceID = topicSlice[2] + "_" + topicSlice[3] + "_" + topicSlice[4] + "_" + topicSlice[5]
 	} else {
 		log.Printf("ERROR: no matching topic: %s", msg.Topic())
+		return
 	}
+
+	fmt.Printf("Generated deviceID = %s\n", deviceID)
+
+	var device models.Device
+	device.ID = deviceID
+	device.MAC = "t.b.d."
+	device.SN = "t.b.d."
+	device.LastMsg = "t.b.d"
+
+	// TODO: store this device in database
 }