timezone in docker image

Dockerfile

@@ -0,0 +1,12 @@
+FROM golang:alpine AS builder
+WORKDIR /build
+ADD go.mod .
+COPY . .
+RUN go build 
+FROM alpine
+RUN apk add --no-cache tzdata
+ENV TZ=Europe/Zurich
+WORKDIR /build
+COPY --from=builder /build/wo-bisch-lorahandler /build/wo-bisch-lorahandler
+CMD ["./wo-bisch-lorahandler"]
+EXPOSE 8080

alert.go

@@ -76,7 +76,10 @@ func sendAlert(deveui string, alertMessage string) {
 	emailalarmactive := getDevEmailAlarmactive(deveui)
 	fmt.Printf("sendAlert: deveui=%s, email=%s, emailalarmactive=%s\n", deveui, email, emailalarmactive)
 	if emailalarmactive == "1" {
-		sendEmail(email, alertMessage)
+		emails := strings.Split(email, ",")
+		for _, em := range emails {
+			sendEmailMessage(em, alertMessage)
+		}
 	}
 }
 
@@ -100,17 +103,19 @@ func DispatchAlert(deveui string, alertType string) {
 	}
 
 	// then we check that an alert was not already sent out recently
-	if AlertAlreadySentRecently(deveui) {
+	if AlertAlreadySentRecently(deveui, alertType) {
 		fmt.Printf("Error: Alert for Deveui %s has already been sent!", deveui)
 		return
 	}
 
 	// then we make an entry that an alert was sent, this will expire automatically
-	AddAlertAlreadySentRecently(deveui)
+	AddAlertAlreadySentRecently(deveui, alertType)
 
 	// then we send the alert
 	if alertType == "alert_button" {
 		alertMessage = fmt.Sprintf("Alarm (%s): Knopf gedrueckt, %s", getDevAlias(deveui), time.Now().Format("02.01.2006 15:04:05"))
+	} else if alertType == "alert_greenzone" {
+		alertMessage = fmt.Sprintf("Alarm (%s): Gruene Zone wurde verlassen, %s", getDevAlias(deveui), time.Now().Format("02.01.2006 15:04:05"))
 	}
 	sendAlert(deveui, alertMessage)
 }

go.mod

@@ -0,0 +1,5 @@
+module nbit.ch/wo-bisch-lorahandler/v2
+
+go 1.17
+
+require github.com/gomodule/redigo v1.8.8

go.sum

@@ -0,0 +1,12 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/gomodule/redigo v1.8.8 h1:f6cXq6RRfiyrOJEV7p3JhLDlmawGBVBBP1MggY8Mo4E=
+github.com/gomodule/redigo v1.8.8/go.mod h1:7ArFNvsTjH8GMMzB4uy1snslv2BwmginuMs06a1uzZE=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

mail.go

@@ -1,27 +1,39 @@
 package main
 
 import (
-	"bytes"
 	"log"
 	"net/smtp"
 )
 
-func sendEmail(username, message string) {
-	c, err := smtp.Dial("127.0.0.1:25")
+func sendEmail(mail_to, mail_default_authuser, mail_message string) {
+	var auth smtp.Auth
+	if getenv("MAILSERVER_USER", "") != "" {
+		// Set up authentication information.
+		auth = smtp.PlainAuth(
+			"",
+			getenv("MAILSERVER_USER", ""),
+			getenv("MAILSERVER_PASSWORD", ""),
+			getenv("MAILSERVER_HOST", "127.0.0.1"),
+		)
+	}
+	// Connect to the server, authenticate, set the sender and recipient,
+	// and send the email all in one step.
+	err := smtp.SendMail(
+		getenv("MAILSERVER_HOST", "127.0.0.1")+":"+getenv("MAILSERVER_PORT", "25"),
+		auth,
+		getenv("MAILSERVER_USER", mail_default_authuser),
+		[]string{mail_to},
+		[]byte(mail_message),
+	)
+
 	if err != nil {
 		log.Fatal(err)
 	}
-	defer c.Close()
-	// Set the sender and recipient.
-	c.Mail("info@wo-bisch.ch")
-	c.Rcpt(username)
-	// Send the email body.
-	wc, err := c.Data()
-	if err != nil {
-		log.Fatal(err)
 }
-	defer wc.Close()
+
+func sendEmailMessage(username, message string) {
 	mail_message := "To: " + username + `
+From: info@wo-bisch.ch
 Subject: ` + message + `
 
 Lieber Benutzer von wo-bisch.ch
@@ -30,8 +42,5 @@ Lieber Benutzer von wo-bisch.ch
 --
 wo-bisch.ch`
 
-	buf := bytes.NewBufferString(mail_message)
-	if _, err = buf.WriteTo(wc); err != nil {
-		log.Fatal(err)
-	}
+	sendEmail(username, "mail@wo-bisch.ch", mail_message)
 }

persistence.go

@@ -3,6 +3,7 @@ package main
 import (
 	"github.com/gomodule/redigo/redis"
 	"log"
+	"os"
 	"time"
 )
 
@@ -11,6 +12,14 @@ var globalPool *redis.Pool
 const alertsentPrefix string = "alertsent:"
 const devPrefix string = "dev:"
 
+func getenv(key, fallback string) string {
+	value := os.Getenv(key)
+	if len(value) == 0 {
+		return fallback
+	}
+	return value
+}
+
 func newPool() *redis.Pool {
 	return &redis.Pool{
 		// Maximum number of idle connections in the pool.
@@ -20,7 +29,7 @@ func newPool() *redis.Pool {
 		// Dial is an application supplied function for creating and
 		// configuring a connection.
 		Dial: func() (redis.Conn, error) {
-			c, err := redis.Dial("tcp", ":6379")
+			c, err := redis.Dial("tcp", getenv("REDIS_CONNECTION_STRING", ":6379"))
 			if err != nil {
 				panic(err.Error())
 			}
@@ -192,29 +201,66 @@ func getEmail(deveui string) string {
 	return res
 }
 
-func AlertAlreadySentRecently(deveui string) bool {
+func getDevGreenzone(deveui string) string {
+	res := ""
+
+	if deveui == "" {
+		return res
+	}
+
 	conn := globalPool.Get()
 	defer conn.Close()
 
-	exists, _ := redis.Bool(conn.Do("EXISTS", alertsentPrefix+deveui))
+	greenzone, err := redis.String(conn.Do("HGET", devPrefix+deveui, "greenzone"))
+	if err == nil {
+		res = greenzone
+	} else {
+		log.Print(err)
+	}
+
+	return res
+}
+
+func AlertAlreadySentRecently(deveui string, what string) bool {
+	conn := globalPool.Get()
+	defer conn.Close()
+
+	exists, _ := redis.Bool(conn.Do("EXISTS", alertsentPrefix+deveui+":"+what))
 	return exists
 }
 
-func AddAlertAlreadySentRecently(deveui string) {
+func AddAlertAlreadySentRecently(deveui string, what string) {
 	conn := globalPool.Get()
 	defer conn.Close()
+	expire_duration := 120
+	if what == "alert_greenzone" {
+		expire_duration = 7 * 24 * 60 * 60
+	}
 
-	_, err := conn.Do("SET", alertsentPrefix+deveui, "1")
+	_, err := conn.Do("SET", alertsentPrefix+deveui+":"+what, "1")
 
 	if err != nil {
 		return
 	}
 
 	// we set an expiration time to prevent duplicate alerts
-	_, err1 := conn.Do("EXPIRE", alertsentPrefix+deveui, 120)
+	_, err1 := conn.Do("EXPIRE", alertsentPrefix+deveui+":"+what, expire_duration)
 
 	if err1 != nil {
 		return
 	}
 
 }
+
+func DeleteGreenzoneAlert(deveui string) bool {
+	conn := globalPool.Get()
+	defer conn.Close()
+
+	_, err := conn.Do("DEL", alertsentPrefix+deveui+":alert_greenzone")
+	if err != nil {
+		return false
+	}
+
+	return true
+
+}

wo-bisch-lorahandler.go

@@ -11,11 +11,13 @@ import (
 	"log"
 	"net/http"
 	"os"
+	"strconv"
+	"strings"
 	"time"
 )
 
 const (
-	outputfile = "/home/appuser/wo-bisch-lorahandler/wo-bisch-lorahandler.log"
+	outputfile = "/data/wo-bisch-lorahandler.log"
 )
 
 type MessageProperties struct {
@@ -45,7 +47,7 @@ func WriteStringToFile(s string, deveui string) {
 
 	// Also write to individual files
 	datestr := time.Now().Format("2006-01")
-	individual_file := "/home/appuser/wo-bisch-lorahandler/logs/" + deveui + "-" + datestr + ".log"
+	individual_file := "/data/logs/" + deveui + "-" + datestr + ".log"
 
 	fi, err := os.OpenFile(individual_file, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0644)
 	if err != nil {
@@ -65,6 +67,35 @@ func Convert2Hex(payload_raw string) (string, error) {
 	return res, err
 }
 
+// 0: inside greenzone, 1: outside greenzone, 2: no GPS
+func IsOutsideGreenzone(deveui string, lon float64, lat float64) int {
+	if lon < 1 {
+		return 2
+	}
+	if lat < 1 {
+		return 2
+	}
+	res := false
+	greenzone := getDevGreenzone(deveui)
+	if greenzone != "" {
+		coords := strings.Split(greenzone, ",")
+		if len(coords) == 4 {
+			lon_min, _ := strconv.ParseFloat(coords[0], 32)
+			lat_min, _ := strconv.ParseFloat(coords[1], 32)
+			lon_max, _ := strconv.ParseFloat(coords[2], 32)
+			lat_max, _ := strconv.ParseFloat(coords[3], 32)
+			res = (lon < lon_min || lon > lon_max || lat < lat_min || lat > lat_max)
+		} else {
+			log.Printf("greenzone does not have right format: %s!", greenzone)
+		}
+	}
+	if res {
+		return 1
+	} else {
+		return 0
+	}
+}
+
 func DecodePayload(s string, deveui string) {
 	type payload struct {
 		Latitude  uint32
@@ -93,10 +124,19 @@ func DecodePayload(s string, deveui string) {
 		vbat := (pl.AlarmBat & 0x3fff)            // Battery Voltage in mV
 		fw := 160 + (pl.Flag & 0x1f)              // Firmware version; 5 bits
 		alarm := (pl.AlarmBat & 0x4000) == 0x4000 // Alarm Bit
+		outsideGreenzone := IsOutsideGreenzone(deveui, float64(pl.Longitude)/1000000.0, float64(pl.Latitude)/1000000.0)
+		flags := 0
+		if outsideGreenzone == 1 {
+			flags += 2
+		}
+		if alarm {
+			flags += 1
+		}
 
 		log.Printf("AlarmBit:         %v", alarm)
+		log.Printf("outsideGreenzone: %d", outsideGreenzone)
 
-		mystring := fmt.Sprintf("measurement,deveui=%s lat=%.5f,lon=%.5f,vbat=%d,fw=%d %d\n", deveui, float32(pl.Latitude)/1000000.0, float32(pl.Longitude)/1000000.0, vbat, fw, (time.Now().Unix() * 1000 * 1000 * 1000))
+		mystring := fmt.Sprintf("measurement,deveui=%s lat=%.5f,lon=%.5f,vbat=%d,fw=%d,flags=%d %d\n", deveui, float32(pl.Latitude)/1000000.0, float32(pl.Longitude)/1000000.0, vbat, fw, flags, (time.Now().Unix() * 1000 * 1000 * 1000))
 
 		WriteStringToFile(mystring, deveui)
 		// we send an alert, when the alert bit is set
@@ -104,6 +144,16 @@ func DecodePayload(s string, deveui string) {
 			log.Printf("DispatchAlert (button pressed) for %s\n", deveui)
 			DispatchAlert(deveui, "alert_button")
 		}
+		if outsideGreenzone == 1 {
+			log.Printf("DispatchAlert (outside greenzone) for %s\n", deveui)
+			DispatchAlert(deveui, "alert_greenzone")
+		} else if outsideGreenzone == 0 {
+			// we reset the alert, when we are again withing the greenzone
+			if AlertAlreadySentRecently(deveui, "alert_greenzone") {
+				fmt.Printf("Info: we are again in Greenzone for Deveui %s, clear alert!", deveui)
+				DeleteGreenzoneAlert(deveui)
+			}
+		}
 
 	} else {
 		log.Printf("Payload is not >= 11 bytes (22 chars): %s", s)