fix textcard type add btntxt parameter

Author: qjzydsz

context.go

@@ -105,10 +105,10 @@ func (c *Context) NewVideo(mediaId, title, desc string) *Context {
 }
 
 // NewTextcard Textcard消息
-func (c *Context) NewTextcard(title, description, url string) *Context {
+func (c *Context) NewTextcard(title, description, url, btntxt string) *Context {
 	c.Resp = &Textcard{
 		wxResp:   c.newResp(TypeTextcard),
-		Textcard: textcard{CDATA(title), CDATA(description), CDATA(url)}}
+		Textcard: textcard{CDATA(title), CDATA(description), CDATA(url), CDATA(btntxt)}}
 	return c
 }
 

send.go

@@ -65,8 +65,8 @@ func (s *Server) SendVideo(to string, mediaId, title, desc string) *WxErr {
 }
 
 // SendTextcard 发送客服extcard消息
-func (s *Server) SendTextcard(to string, title, desc, url string) *WxErr {
-	return s.SendMsg(s.NewTextcard(to, title, desc, url))
+func (s *Server) SendTextcard(to string, title, desc, url, btntxt string) *WxErr {
+	return s.SendMsg(s.NewTextcard(to, title, desc, url, btntxt))
 }
 
 // SendMusic 发送客服Music消息

type.go

@@ -179,14 +179,15 @@ type (
 		Title       CDATA `json:"title"`
 		Description CDATA `json:"description"`
 		Url         CDATA `json:"url"`
+		Btn         CDATA `json:"btntxt"`
 	}
 )
 
 // NewTextcard Textcard消息
-func (s *Server) NewTextcard(to, title, description, url string) Textcard {
+func (s *Server) NewTextcard(to, title, description, url, btntxt string) Textcard {
 	return Textcard{
 		s.newWxResp(TypeTextcard, to),
-		textcard{CDATA(title), CDATA(description), CDATA(url)},
+		textcard{CDATA(title), CDATA(description), CDATA(url), CDATA(btntxt)},
 	}
 }