create BotMessage.meta flag

src/botscript.rs

@@ -499,6 +499,10 @@ pub struct BotMessage {
     buttons: Option<KeyboardDefinition>,
     state: Option<String>,
 
+    /// flag options to command is meta, so it will be appended to user.metas in db
+    #[serde(default)]
+    meta: bool,
+
     handler: Option<BotFunction>,
 }
 
@@ -517,6 +521,10 @@ impl BotMessage {
     pub fn get_handler(&self) -> Option<&BotFunction> {
         self.handler.as_ref()
     }
+
+    pub fn meta(&self) -> bool {
+        self.meta
+    }
 }
 
 impl BotMessage {