refactor

README.md

@@ -25,7 +25,4 @@ You can manage your apps here https://developers.facebook.com/apps/
 From Whatsapp Developer Dashboard you can try and send a test message to your phone number.
 to be sure that everything is working fine before you start using this api.
 
-When all the above is done you can start using this api.
-
-
-Head over to [HOWTO](/HOWTO.md) file
+When all the above is done you can start using this api.

http/http.go → pkg/http/http.go

@@ -317,13 +317,6 @@ type (
 		Password string
 	}
 
-	// requestNameKey is a type that holds the name of a request. This is usually passed
-	// extracted from Request.Context.Name and passed down to the Do function.
-	// then passed down with to the request hooks. In request hooks, the name can be
-	// used to identify the request and other multiple use cases like instrumentation,
-	// logging etc.
-	requestNameKey string
-
 	// Request is a struct that holds the details that can be used to make a http request.
 	// It is used by the Do function to make a request.
 	// It contains Payload which is an interface that can be used to pass any data type
@@ -604,15 +597,24 @@ func extractRequestBody(payload interface{}) (io.Reader, error) {
 	}
 }
 
+// requestNameKey is a type that holds the name of a request. This is usually passed
+// extracted from Request.Context.Name and passed down to the Do function.
+// then passed down with to the request hooks. In request hooks, the name can be
+// used to identify the request and other multiple use cases like instrumentation,
+// logging etc.
+type requestNameKey string
+
+const requestNameValue = "request-name"
+
 // withRequestName takes a string and a context and returns a new context with the string
 // as the request name.
 func withRequestName(ctx context.Context, name string) context.Context {
-	return context.WithValue(ctx, requestNameKey("request-name"), name)
+	return context.WithValue(ctx, requestNameKey(requestNameValue), name)
 }
 
 // RequestNameFromContext returns the request name from the context.
 func RequestNameFromContext(ctx context.Context) string {
-	name, ok := ctx.Value(requestNameKey("request-name")).(string)
+	name, ok := ctx.Value(requestNameKey(requestNameValue)).(string)
 	if !ok {
 		return "unknown request name"
 	}
@@ -645,3 +647,33 @@ func (e *ResponseError) Error() string {
 func (e *ResponseError) Unwrap() error {
 	return e.Err
 }
+
+type (
+
+	// ResponseDecoder decodes the response body into the given interface.
+	ResponseDecoder interface {
+		DecodeResponse(response *http.Response, v interface{}) error
+	}
+
+	// ResponseDecoderFunc is an adapter to allow the use of ordinary functions as
+	// response decoders. If f is a function with the appropriate signature,
+	// ResponseDecoderFunc(f) is a ResponseDecoder that calls f.
+	ResponseDecoderFunc func(response *http.Response, v interface{}) error
+
+	// RawResponseDecoder ...
+	RawResponseDecoder func(response *http.Response) error
+)
+
+// DecodeResponse calls f(response, v).
+func (f RawResponseDecoder) DecodeResponse(response *http.Response,
+	_ interface{},
+) error {
+	return f(response)
+}
+
+// DecodeResponse calls f(ctx, response, v).
+func (f ResponseDecoderFunc) DecodeResponse(response *http.Response,
+	v interface{},
+) error {
+	return f(response, v)
+}

models/models.go → pkg/models/models.go

@@ -162,7 +162,7 @@ type (
 	//
 	// Template A template (object). Required when type=template. A template object.
 	//
-	// Text text (object). Required for text messages. A text objects.
+	// Text (object). Required for text messages. A text objects.
 	//
 	// To string. Required. WhatsApp ID or phone number for the person you want to send a message to.
 	// See Phone Numbers, Formatting for more information. If needed, On-Premises API users can get this number by