Add /silent command to send messages without sound

telegram/commands.go

@@ -56,6 +56,7 @@ var transportCommands = map[string]command{
 var chatCommands = map[string]command{
 	"d":          command{"[n]", "delete your last message(s)"},
 	"s":          command{"edited message", "edit your last message"},
+	"silent":     command{"message", "send a message without sound"},
 	"add":        command{"@username", "add @username to your chat list"},
 	"join":       command{"https://t.me/invite_link", "join to chat via invite link"},
 	"group":      command{"title", "create groupchat «title» with current user"},
@@ -448,6 +449,28 @@ func (c *Client) ProcessChatCommand(chatID int64, cmdline string) (string, bool)
 		} else {
 			return "Message processing error", true
 		}
+	// send without sound
+	case "silent":
+		if len(args) < 1 {
+			return "Not enough arguments", true
+		}
+
+		content := c.ProcessOutgoingMessage(0, rawCmdArguments(cmdline, 0), "")
+
+		if content != nil {
+			_, err := c.client.SendMessage(&client.SendMessageRequest{
+				ChatId:              chatID,
+				InputMessageContent: content,
+				Options: &client.MessageSendOptions{
+					DisableNotification: true,
+				},
+			})
+			if err != nil {
+				return err.Error(), true
+			}
+		} else {
+			return "Message processing error", true
+		}
 	// add @contact
 	case "add":
 		if len(args) < 1 {