Expose iOS copy payload API

crates/tele-core/src/session.rs

@@ -218,6 +218,20 @@ impl<C: TdClientTrait> CoreSession<C> {
             .collect())
     }
 
+    pub async fn copy_payload(
+        &mut self,
+        chat_id: ChatId,
+        message_id: MessageId,
+    ) -> Result<String, String> {
+        self.client
+            .get_chat_history(chat_id, i32::MAX)
+            .await?
+            .into_iter()
+            .find(|message| message.id() == message_id)
+            .map(|message| message.text().to_string())
+            .ok_or_else(|| "message not found".to_string())
+    }
+
     pub async fn open_profile(&mut self, chat_id: ChatId) -> Result<CoreProfile, String> {
         let profile = self
             .client
@@ -871,6 +885,10 @@ mod tests {
             .edit_text_message(chat_id, MessageId::new(10), "After".to_string())
             .await
             .unwrap();
+        let copied = session
+            .copy_payload(chat_id, MessageId::new(10))
+            .await
+            .unwrap();
         session
             .delete_messages(chat_id, vec![MessageId::new(10)], true)
             .await
@@ -878,6 +896,7 @@ mod tests {
 
         assert_eq!(sent.text, "Hello");
         assert_eq!(edited.text, "After");
+        assert_eq!(copied, "After");
         assert_eq!(
             session.poll_events(),
             vec![