Add ability to specify more than one tg_chat_id

main.go

@@ -5,6 +5,8 @@ import (
 	"fmt"
 	"net"
 	"flag"
+	"strings"
+	"strconv"
 
 	"github.com/probakowski/go-satel"
 	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
@@ -13,13 +15,23 @@ import (
 func main() {
 	satel_api_addr := flag.String("satel_addr", "", "Address that should be used to connect to the SATEL device")
 	satel_api_port := flag.String("satel_port", "7094", "Port that should be used to connect to the SATEL device")
-	chat_id := flag.Int64("tg_chat_id", -1, "Telegram Chat ID where to send updates")
+	chat_id_raw := flag.String("tg_chat_id", "", "Telegram Chat ID where to send updates. Use \",\" to specify multiple IDs.")
 	flag.Parse()
 
-	if len(*satel_api_addr) == 0 || len(*satel_api_port) == 0 || *chat_id == -1 {
+	if len(*satel_api_addr) == 0 || len(*satel_api_port) == 0 || len(*chat_id_raw) == 0 {
 		fmt.Println("Use --satel_addr=ADDR, --satel_port=PORT and --tg_chat_id=CHAT_ID command line flags to continue.")
 		os.Exit(1)
 	}
+	chat_ids_strings := strings.Split(*chat_id_raw, ",")
+	var chat_ids []int64
+	for _, chat_id_str := range chat_ids_strings {
+		chat_id, err := strconv.ParseInt(chat_id_str, 10, 64)
+		if err != nil {
+			fmt.Printf("Tried to use a non-int value for one of tg_chat_ids: %s. That's bad.", chat_id_str)
+			os.Exit(1)
+		}
+		chat_ids = append(chat_ids, chat_id)
+	}
 
 	satel_addr := fmt.Sprintf("%s:%s", *satel_api_addr, *satel_api_port)
 	satel_conn, err := net.Dial("tcp", satel_addr)
@@ -34,12 +46,14 @@ func main() {
 
 	for e, ok := <-s.Events; ok; e, ok = <-s.Events {
 	    fmt.Println("Change from SATEL: ", "type", e.Type, "index", e.Index, "value", e.Value)
-	    msg := tgbotapi.NewMessage(*chat_id, fmt.Sprintf("Change from SATEL: Zone: %d Type: %s Value: %t",
-	    	e.Index, e.Type, e.Value))
+	    for _, chat_id := range chat_ids {
+		    msg := tgbotapi.NewMessage(chat_id, fmt.Sprintf("Change from SATEL: Zone: %d Type: %s Value: %t",
+		    	e.Index, e.Type, e.Value))
 
-	    if _, err := bot.Send(msg); err != nil {
-	    	// TODO: retry sending later in case of problems
-            panic(err)
-        }
+		    if _, err := bot.Send(msg); err != nil {
+		    	// TODO: retry sending later in case of problems
+	            panic(err)
+	        }
+	    }
 	}
 }