notfall/main.go

package main

import (
	_ "embed"
	"encoding/json"
	"github.com/sms77io/go-client/sms77api"
	"html/template"
	"net/http"
	"os"
	"time"
)

var lastData map[string]interface{}

//go:embed notfall.tmpl
var templateContent []byte

var active = false
var activeSince time.Time
var getData = false


func main()  {
	http.HandleFunc("/owntrack", func(writer http.ResponseWriter, request *http.Request) {
		var p map[string]interface{}
		err := json.NewDecoder(request.Body).Decode(&p)
		if err != nil {
			writer.WriteHeader(http.StatusInternalServerError)
			return
		}

		if p["_type"] == "location"{
			lastData = p
		}

		getData = true

		writer.Write([]byte("[]"))
	})

	http.HandleFunc("/", func(writer http.ResponseWriter, request *http.Request) {
		templ := template.Must(template.New("page").Parse(string(templateContent)))
		templ.Execute(writer, map[string]interface{}{
		})
	})

	http.HandleFunc("/activate", func(writer http.ResponseWriter, request *http.Request) {
		if active == true {
			return
		}
		var klient = sms77api.New(sms77api.Options{
			ApiKey: os.Getenv("sms77key"),
		})

		sms := sms77api.SmsBaseParams{
			Text: "Jemand greift auf deine Position zu",
			To: "004917655424258",
			From: "Notfall-Portal",
		}
		_, err := klient.Sms.Text(sms77api.SmsTextParams{
			SmsBaseParams:   sms,
			Details:         false,
			ReturnMessageId: false,
		})
		if err != nil {
			panic(err)
		}
		active = true
		activeSince = time.Now()
		http.Redirect(writer, request, "/", http.StatusSeeOther)
	})

	http.HandleFunc("/json", func(writer http.ResponseWriter, request *http.Request) {
		if getData == false || active == false {
			writer.WriteHeader(http.StatusInternalServerError)
			return
		}

		diff := time.Now().Sub(activeSince)
		if diff.Minutes() > 2 {
			active = false
			writer.WriteHeader(http.StatusInternalServerError)
			return
		}

		data := make(map[string]interface{})

		data["lat"] = lastData["lat"]
		data["lon"] = lastData["lon"]
		data["tst"] = lastData["tst"]
		data["acc"] = lastData["acc"]

		r, err := json.Marshal(data)
		if err != nil {
			panic(err)
		}

		writer.Write(r)
	})

	http.ListenAndServe(":8080", nil)
}