Fix a crash on big emojis

telegram/connect.go

@@ -154,6 +154,7 @@ func (c *Client) interactor() {
 	for {
 		state, ok := <-c.authorizer.State
 		if !ok {
+			gateway.SendMessage(c.jid, "", "Interactor is disconnected", c.xmpp)
 			log.Error("Interactor is disconnected")
 			return
 		}

telegram/utils.go

@@ -247,11 +247,13 @@ func (c *Client) formatMessage(chatID int64, messageID int64, preview bool, mess
 	}
 
 	var text string
-	switch message.Content.MessageContentType() {
-	case client.TypeMessageText:
-		messageText, _ := message.Content.(*client.MessageText)
-		text = messageText.Text.Text
-		// TODO: handle other message types with labels (not supported in Zhabogram!)
+	if message.Content != nil {
+		switch message.Content.MessageContentType() {
+		case client.TypeMessageText:
+			messageText, _ := message.Content.(*client.MessageText)
+			text = messageText.Text.Text
+			// TODO: handle other message types with labels (not supported in Zhabogram!)
+		}
 	}
 	if text != "" {
 		if !preview {
@@ -285,6 +287,11 @@ func (c *Client) formatContent(file *client.File, filename string) string {
 }
 
 func (c *Client) messageToText(message *client.Message) string {
+	if message.Content == nil {
+		log.Warnf("Unknown message (big emoji?): %#v", message)
+		return "<BIG EMOJI>"
+	}
+
 	markupFunction := formatter.EntityToMarkdown
 	switch message.Content.MessageContentType() {
 	case client.TypeMessageSticker:
@@ -378,6 +385,10 @@ func (c *Client) messageToText(message *client.Message) string {
 }
 
 func (c *Client) contentToFilename(content client.MessageContent) (*client.File, string) {
+	if content == nil {
+		return nil, ""
+	}
+
 	switch content.MessageContentType() {
 	case client.TypeMessageSticker:
 		sticker, _ := content.(*client.MessageSticker)