From e51fe7f41938d0ad7ce9f67d78c17131f1be26c6 Mon Sep 17 00:00:00 2001
From: Hamcha <zikyky@gmail.com>
Date: Thu, 13 Dec 2018 13:41:58 +0100
Subject: [PATCH] Add edit media support

---
 command.go  | 14 ++++++++++++++
 telegram.go | 23 +++++++++++++++++++++++
 2 files changed, 37 insertions(+)

diff --git a/command.go b/command.go
index b5f3fcd..107be53 100644
--- a/command.go
+++ b/command.go
@@ -47,6 +47,12 @@ const (
 
 	// CmdSendAlbum requests the broker sends an album of photos or videos
 	CmdSendAlbum ClientCommandType = "sendAlbum"
+
+	// CmdAnswerCallback requests the broker to reply to a incoming callback query
+	CmdAnswerCallback ClientCommandType = "answerCallback"
+
+	// CmdEditMedia requests to broker to replace the media contents of a message
+	CmdEditMedia ClientCommandType = "editMedia"
 )
 
 // ClientTextMessageData is the required data for a CmdSendTextMessage request
@@ -96,6 +102,14 @@ type ClientAlbumData struct {
 	ReplyID *int64 `json:",omitempty"`
 }
 
+// ClientEditMediaData is the required data for a CmdEditMedia request
+type ClientEditMediaData struct {
+	ChatID      int64
+	MessageID   int64
+	Media       interface{}
+	ReplyMarkup interface{} `json:",omitempty"`
+}
+
 // ChatAction is the action name for CmdSendChatAction requests
 type ChatAction string
 
diff --git a/telegram.go b/telegram.go
index 896ea4f..ae279d8 100644
--- a/telegram.go
+++ b/telegram.go
@@ -213,6 +213,29 @@ func (t Telegram) AnswerCallback(data ClientCallbackQueryData) {
 	checkerr("AnswerCallback/http.PostForm", err)
 }
 
+// EditMedia modifies the media content (like photo) of a message
+func (t Telegram) EditMedia(data ClientEditMediaData) {
+	jsonmedia, err := json.Marshal(data.Media)
+	if err != nil {
+		checkerr("SendAlbum/json.Marshal", err)
+	}
+	postdata := url.Values{
+		"chat_id":    {strconv.FormatInt(data.ChatID, 10)},
+		"message_id": {strconv.FormatInt(data.MessageID, 10)},
+		"media":      {string(jsonmedia)},
+	}
+	if data.ReplyMarkup != nil {
+		replyjson, err := json.Marshal(data.ReplyMarkup)
+		if !checkerr("SendTextMessage/json.Marshal", err) {
+			return
+		}
+		postdata["reply_markup"] = []string{string(replyjson)}
+	}
+
+	_, err = http.PostForm(t.apiURL("editMessageMedia"), postdata)
+	checkerr("EditMedia/http.PostForm", err)
+}
+
 // AnswerInlineQuery replies to an inline query
 func (t Telegram) AnswerInlineQuery(data InlineQueryResponse) error {
 	jsonresults, err := json.Marshal(data.Results)