upgrade go version

go.mod

@@ -1,3 +1,3 @@
 module github.com/piusalfred/whatsapp
 
-go 1.20
+go 1.21

http/debug.go

@@ -24,7 +24,6 @@ import (
 	"io"
 	"net/http"
 	"net/http/httputil"
-	"os"
 	"strings"
 )
 
@@ -36,30 +35,38 @@ type DebugFunc func(io.Writer) Hook
 // the request and response.
 func DebugHook(writer io.Writer) Hook {
 	return func(ctx context.Context, req *http.Request, resp *http.Response) {
-		var buff strings.Builder
+		buff := &strings.Builder{}
 		name := strings.ToUpper(RequestNameFromContext(ctx))
 		buff.WriteString(name)
-		buff.WriteString("\n")
-		if req != nil {
-			b, err := httputil.DumpRequestOut(req, true)
-			if err == nil {
-				buff.Write(b)
-				buff.WriteString("\n")
-			}
-		}
+		buff.WriteString("\n\n")
 
-		if resp != nil {
-			b, err := httputil.DumpResponse(resp, true)
-			if err == nil {
-				buff.Write(b)
-				buff.WriteString("\n")
-			}
-		}
+		dumpRequest(buff, req)
+		dumpResponse(buff, resp)
+		//
+		//if writer == nil {
+		//	_, _ = os.Stdout.Write(buff.Bytes())
+		//} else {
+		//	_, _ = writer.Write(buff.Bytes())
+		//}
+	}
+}
 
-		if writer == nil {
-			_, _ = os.Stdout.Write([]byte(buff.String()))
+func dumpRequest(buff *strings.Builder, req *http.Request) {
+	if req != nil {
+		b, err := httputil.DumpRequestOut(req, true)
+		if err == nil {
+			buff.Write(b)
+			buff.WriteString("\n\n")
 		}
+	}
+}
 
-		_, _ = writer.Write([]byte(buff.String()))
+func dumpResponse(buff *strings.Builder, resp *http.Response) {
+	if resp != nil {
+		b, err := httputil.DumpResponse(resp, true)
+		if err == nil {
+			buff.Write(b)
+			buff.WriteString("\n\n")
+		}
 	}
 }

http/http.go

@@ -378,3 +378,8 @@ type ResponseError struct {
 func (e *ResponseError) Error() string {
 	return fmt.Sprintf("whatsapp error: http code: %d, %s", e.Code, strings.ToLower(e.Err.Error()))
 }
+
+// Unwrap returns the underlying error for ResponseError.
+func (e *ResponseError) Unwrap() error {
+	return e.Err
+}

templates/templates.go

@@ -0,0 +1,58 @@
+/*
+Package templates provides structures and utilities for creating and manipulating WhatsApp message
+templates.
+
+WhatsApp message templates are specific message formats that businesses use to send out notifications
+or customer care messages to people that have opted in to notifications. These notifications can include
+a variety of messages such as appointment reminders, shipping information, issue resolution, or payment
+updates.
+
+Before using this package to send a template message, you must first create a template. For more information
+on creating templates, refer to the guide titled "Create Message Templates for Your WhatsApp Business Account"
+(https://developers.facebook.com/micro_site/url/?click_from_context_menu=true&country=TZ&destination=https%3A%2F%2Fwww.facebook.com%2Fbusiness%2Fhelp%2F2055875911147364&event_type=click&last_nav_impression_id=0jjgfFiSZMkMJ8TP8&max_percent_page_viewed=10&max_viewport_height_px=999&max_viewport_width_px=1414&orig_http_referrer=https%3A%2F%2Fdevelopers.facebook.com%2Fdocs%2Fwhatsapp%2Fcloud-api%2Fguides%2Fsend-message-templates&orig_request_uri=https%3A%2F%2Fdevelopers.facebook.com%2Fajax%2Fdocs%2Fnav%2F%3Fpath1%3Dwhatsapp%26path2%3Dcloud-api%26path3%3Dguides%26path4%3Dsend-message-templates&region=emea&scrolled=false&session_id=1Qi3IoIHE5nPFSkug&site=developers)
+If your account is not yet verified, you can use one of the pre-approved templates provided.
+
+This package supports the following template types:
+
+- Text-based message templates
+- Media-based message templates
+- Interactive message templates
+- Location-based message templates
+- Authentication templates with one-time password buttons
+- Multi-Product Message templates
+
+All API calls made using this package must be authenticated with an access token. Developers can authenticate their API calls with the access token generated in the App Dashboard > WhatsApp > API Setup panel. Business Solution Providers (BSPs) need to authenticate themselves with an access token that has the 'whatsapp_business_messaging' permission.
+
+*/
+package templates
+
+
+type Message struct {
+	MessagingProduct string   `json:"messaging_product"`
+	RecipientType    string   `json:"recipient_type"`
+	To               string   `json:"to"`
+	Type             string   `json:"type"`
+	Template         *Template `json:"template"`
+}
+
+type Template struct {
+	Name        string      `json:"name"`
+	Language    Language    `json:"language"`
+	Components  []Component `json:"components"`
+}
+
+type Language struct {
+	Code string `json:"code"`
+}
+
+type Component struct {
+	Type       string      `json:"type"`
+	SubType    string      `json:"sub_type,omitempty"`
+	Index      string      `json:"index,omitempty"`
+	Parameters []Parameter `json:"parameters"`
+}
+
+type Parameter struct {
+	Type string `json:"type"`
+	Text string `json:"text"`
+}