Add NotifyMessage method

README.md

@@ -1,6 +1,8 @@
 # go-linenotify
 
+[![GoDoc Reference](https://godoc.org/github.com/utahta/go-linenotify?status.svg)](http://godoc.org/github.com/utahta/go-linenotify)
 [![Build Status](https://travis-ci.org/utahta/go-linenotify.svg?branch=master)](https://travis-ci.org/utahta/go-linenotify)
+[![GitHub release](https://img.shields.io/github/release/utahta/go-linenotify.svg)](https://github.com/utahta/go-linenotify/releases)
 
 Go client library for the [LINE Notify](https://notify-bot.line.me/doc/)
 

notify.go

@@ -15,7 +15,7 @@ import (
 )
 
 type (
-	// NotifyResponse
+	// NotifyResponse represents response that LINE Notify API
 	NotifyResponse struct {
 		Status    int    `json:"status"`
 		Message   string `json:"message"`
@@ -24,16 +24,23 @@ type (
 )
 
 var (
-	ErrNotifyInvalidAccessToken = errors.New("Invalid access token")
+	ErrNotifyInvalidAccessToken = errors.New("invalid access token")
 )
 
+// Notify provides convenient Notify* interface
 func (c *Client) Notify(token, message, imageThumbnail, imageFullsize string, image io.Reader) (*NotifyResponse, error) {
 	if image != nil {
 		return c.NotifyWithImage(token, message, image)
 	}
 	return c.NotifyWithImageURL(token, message, imageThumbnail, imageFullsize)
 }
 
+// NotifyMessage notify text message
+func (c *Client) NotifyMessage(token, message string) (*NotifyResponse, error) {
+	return c.NotifyWithImageURL(token, message, "", "")
+}
+
+// NotifyWithImage notify text message and image by binary
 func (c *Client) NotifyWithImage(token, message string, image io.Reader) (*NotifyResponse, error) {
 	body, contentType, err := c.requestBodyWithImage(message, image)
 	if err != nil {
@@ -42,6 +49,7 @@ func (c *Client) NotifyWithImage(token, message string, image io.Reader) (*Notif
 	return c.notify(token, message, body, contentType)
 }
 
+// NotifyWithImageURL notify text message and image by url
 func (c *Client) NotifyWithImageURL(token, message, imageThumbnail, imageFullsize string) (*NotifyResponse, error) {
 	body, contentType, err := c.requestBody(message, imageThumbnail, imageFullsize)
 	if err != nil {