refactor: remove multiple print statements

Signed-off-by: 1998-felix <felix.gateru@gmail.com>

cmd/main.go

@@ -36,6 +36,13 @@ var (
 	maxRetries    uint32
 )
 
+const verboseFmt = `Date: %s
+Code: %s
+Type: %s
+Token: %s
+Message-ID: %d
+`
+
 func main() {
 	rootCmd := &cobra.Command{
 		Use:   "coap-cli <method> <URL> [options]",
@@ -95,11 +102,12 @@ func main() {
 
 func printMsg(m *pool.Message, verbose bool) {
 	if m != nil && verbose {
-		fmt.Printf("Date: %s\n", time.Now().Format(time.RFC1123))
-		fmt.Printf("Code: %s\n", m.Code().String())
-		fmt.Printf("Type: %s\n", m.Type().String())
-		fmt.Printf("Token: %s\n", m.Token().String())
-		fmt.Printf("Message-ID: %d\n", m.MessageID())
+		fmt.Printf(verboseFmt,
+			time.Now().Format(time.RFC1123),
+			m.Code(),
+			m.Type(),
+			m.Token(),
+			m.MessageID())
 		cf, err := m.ContentFormat()
 		if err == nil {
 			fmt.Printf("Content-Format: %s \n", cf.String())

coap/client.go

@@ -22,9 +22,17 @@ import (
 
 var (
 	errInvalidMsgCode = errors.New("message can be GET, POST, PUT or DELETE")
-	errDialFailed     = errors.New("Failed to dial the connection")
+	errDialFailed     = errors.New("failed to dial the connection")
 )
 
+const verboseFmt = `Date: %s
+Code: %s
+Type: %s
+Token: %s
+Message-ID: %d
+Content-Length: %d
+`
+
 // Client represents CoAP client.
 type Client struct {
 	conn *client.Conn
@@ -73,22 +81,23 @@ func (c Client) Receive(path string, verbose bool, opts ...message.Option) (mux.
 			fmt.Println("Error reading message body: ", err)
 			return
 		}
-		bs, err := res.BodySize()
+		bodySize, err := res.BodySize()
 		if err != nil {
 			fmt.Println("Error getting body size: ", err)
 			return
 		}
-		if bs == 0 {
+		if bodySize == 0 {
 			fmt.Println("Received observe")
 		}
 		switch verbose {
 		case true:
-			fmt.Printf("Date: %s\n", time.Now().Format(time.RFC1123))
-			fmt.Printf("Code: %s\n", res.Code().String())
-			fmt.Printf("Type: %s\n", res.Type().String())
-			fmt.Printf("Token: %s\n", res.Token().String())
-			fmt.Printf("Message-ID: %d\n", res.MessageID())
-			fmt.Printf("Content-Length: %d\n", bs)
+			fmt.Printf(verboseFmt,
+				time.Now().Format(time.RFC1123),
+				res.Code(),
+				res.Type(),
+				res.Token(),
+				res.MessageID(),
+				bodySize)
 			if len(body) > 0 {
 				fmt.Printf("Payload: %s\n\n", string(body))
 			}