Added handler for MESSAGE_NOT_MODIFIED error when edit media.

Telegram/SourceFiles/apiwrap.cpp

@@ -4640,8 +4640,17 @@ void ApiWrap::editUploadedPhoto(
 			media,
 			MTPReplyMarkup(),
 			sentEntities
-		)).done([=](const MTPUpdates &result) { LOG(("APPLY.")); applyUpdates(result);
-		}).fail([=](const RPCError &error) { LOG(("FAIL."));
+		)).done([=](const MTPUpdates &result) {
+			item->clearSavedMedia();
+			applyUpdates(result);
+		}).fail([=](const RPCError &error) {
+			QString err = error.type();
+			if (err == qstr("MESSAGE_NOT_MODIFIED")) {
+				item->returnSavedMedia();
+				_session->data().sendHistoryChangeNotifications();
+			} else {
+				sendMessageFail(error);
+			}
 		}).send();
 	}
 }
@@ -4694,8 +4703,17 @@ void ApiWrap::editUploadedDocument(
 				media,
 				MTPReplyMarkup(),
 				sentEntities
-			)).done([=](const MTPUpdates &result) { LOG(("APPLY.")); applyUpdates(result);
-			}).fail([=](const RPCError &error) { LOG(("FAIL."));
+			)).done([=](const MTPUpdates &result) {
+				item->clearSavedMedia();
+				applyUpdates(result);
+			}).fail([=](const RPCError &error) {
+				QString err = error.type();
+				if (err == qstr("MESSAGE_NOT_MODIFIED")) {
+					item->returnSavedMedia();
+					_session->data().sendHistoryChangeNotifications();
+				} else {
+					sendMessageFail(error);
+				}
 			}).send();
 		}
 	}

Telegram/SourceFiles/history/history_item.h

@@ -132,6 +132,7 @@ public:
 
 	// For edit media in history_message.
 	virtual void returnSavedMedia() {};
+	virtual void clearSavedMedia() {};
 
 	// Zero result means this message is not self-destructing right now.
 	virtual crl::time getSelfDestructIn(crl::time now) {

Telegram/SourceFiles/history/history_message.cpp

@@ -742,7 +742,6 @@ QString FormatViewsCount(int views) {
 
 void HistoryMessage::refreshMedia(const MTPMessageMedia *media) {
 	_media = nullptr;
-	_savedMedia = nullptr;
 	if (media) {
 		setMedia(*media);
 	}

Telegram/SourceFiles/history/history_message.h

@@ -90,6 +90,9 @@ public:
 	void refreshMedia(const MTPMessageMedia *media);
 	void refreshSentMedia(const MTPMessageMedia *media);
 	void returnSavedMedia() override;
+	void clearSavedMedia() {
+		_savedMedia = nullptr;
+	}
 	void setMedia(const MTPMessageMedia &media);
 	static std::unique_ptr<Data::Media> CreateMedia(
 		not_null<HistoryMessage*> item,