adding text message receiver

executors/receive_message_manager.go

@@ -0,0 +1,70 @@
+package executors
+
+import (
+	"fmt"
+	"github.com/Rhymen/go-whatsapp"
+	"os"
+	"os/signal"
+	"strings"
+	"syscall"
+	"time"
+)
+
+type textHandler struct{}
+
+// HandleError implements the handler interface for go-whatsapp
+func (t textHandler) HandleError(err error) {
+	// TODO : handle go routine here
+	fmt.Printf("error in textHandler : %v", err)
+	return
+}
+
+// checks if the string is of interest to the handler.
+// checks for "youtube:" tag in this case.
+// returns the "song:" tag if successful.
+func interesting(str string) (string, bool) {
+	parts := strings.Split(str, ":")
+	if len(parts) < 2 {
+		return "", false
+	}
+	fmt.Println(parts, strings.EqualFold(strings.TrimSpace(parts[0]), "youtube"), strings.TrimSpace(parts[0]))
+	if strings.EqualFold(strings.TrimSpace(parts[0]), "youtube") {
+		return strings.TrimSpace(parts[1]), true
+	}
+	return "", false
+}
+
+// HandleTextMessage implements the text message handler interface for go-whatsapp
+func (t textHandler) HandleTextMessage(msg whatsapp.TextMessage) {
+	fmt.Println("received message")
+	text := msg.Text
+	if song, ok := interesting(text); ok && song != "" {
+		fmt.Printf("going to play %v on youtube\n", song)
+	}
+}
+
+// StartTextReceiver starts the handler for the text messages received
+func StartTextReceiver() error {
+	wac, err := whatsapp.NewConn(5 * time.Second)
+	if err != nil {
+		return fmt.Errorf("error creating connection: %v\n", err)
+	}
+
+	err = LoginWithConnection(wac)
+	if err != nil {
+		return fmt.Errorf("error logging in: %v\n", err)
+	}
+
+	<-time.After(3 * time.Second)
+
+	handler := textHandler{}
+	wac.AddHandler(handler)
+
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, os.Interrupt, syscall.SIGTERM)
+	<-c
+
+	fmt.Println("closing the receiver")
+	wac.Disconnect()
+	return nil
+}

executors/send_message_manager.go

@@ -147,6 +147,7 @@ func sendMessage(msg interface{}) error {
 		return fmt.Errorf("error sending message: %v", err)
 	}
 
+	wac.Disconnect()
 	fmt.Printf("successfully sent, messaageID : %v\n", msgID)
 	return nil
 }

main.go

@@ -63,6 +63,11 @@ func main() {
 			return
 		}
 
+	case "startTextReceiver":
+		if err = executors.StartTextReceiver(); err != nil {
+			return
+		}
+
 	default:
 		// TODO : add a list of all permitted actions
 		err = fmt.Errorf("wrong command provided. please see below for the list of permitted actions")