From ab3e93ab840de39cf5e4fdced4d00de7208e58c3 Mon Sep 17 00:00:00 2001
From: WarmUpTill <WarmUpTill@web.de>
Date: Sun, 2 Aug 2020 20:22:13 +0200
Subject: [PATCH] add fallback to old format for sequence import

---
 src/scene-round-trip.cpp | 64 ++++++++++++++++++++++++++++++++++++++--
 1 file changed, 61 insertions(+), 3 deletions(-)

diff --git a/src/scene-round-trip.cpp b/src/scene-round-trip.cpp
index 3e062bdf..149ba195 100644
--- a/src/scene-round-trip.cpp
+++ b/src/scene-round-trip.cpp
@@ -146,6 +146,50 @@ void SceneSwitcher::on_sceneRoundTripSave_clicked()
 	obs_data_release(obj);
 }
 
+// to be removed once support for old file format is dropped
+bool oldSceneRoundTripLoad(QFile *file)
+{
+	QTextStream in(file);
+	std::vector<QString> lines;
+
+	std::vector<SceneRoundTripSwitch> newSceneRoundTripSwitch;
+
+	while (!in.atEnd()) {
+		QString line = in.readLine();
+		lines.push_back(line);
+		if (lines.size() == 5) {
+			OBSWeakSource scene1 = GetWeakSourceByQString(lines[0]);
+			OBSWeakSource scene2 = GetWeakSourceByQString(lines[1]);
+			OBSWeakSource transition =
+				GetWeakTransitionByQString(lines[4]);
+
+			if (WeakSourceValid(scene1) &&
+			    ((lines[1] == QString(PREVIOUS_SCENE_NAME)) ||
+			     (WeakSourceValid(scene2))) &&
+			    WeakSourceValid(transition)) {
+				newSceneRoundTripSwitch.emplace_back(
+					SceneRoundTripSwitch(
+						GetWeakSourceByQString(lines[0]),
+						GetWeakSourceByQString(lines[1]),
+						GetWeakTransitionByQString(
+							lines[4]),
+						lines[2].toDouble() / 1000.,
+						(lines[1] ==
+						 QString(PREVIOUS_SCENE_NAME)),
+						lines[3].toStdString()));
+			}
+			lines.clear();
+		}
+	}
+
+	if (lines.size() != 0 || newSceneRoundTripSwitch.size() == 0)
+		return false;
+
+	switcher->sceneRoundTripSwitches.clear();
+	switcher->sceneRoundTripSwitches = newSceneRoundTripSwitch;
+	return true;
+}
+
 void SceneSwitcher::on_sceneRoundTripLoad_clicked()
 {
 	std::lock_guard<std::mutex> lock(switcher->m);
@@ -165,9 +209,23 @@ void SceneSwitcher::on_sceneRoundTripLoad_clicked()
 
 	if (!obj) {
 		QMessageBox Msgbox;
-		Msgbox.setText(
-			"Advanced Scene Switcher failed to import settings (try import with previous version of the plugin)");
+		QString txt =
+			"Advanced Scene Switcher failed to import settings!\n";
+		txt += "Falling back to old format.";
+		Msgbox.setText(txt);
 		Msgbox.exec();
+		if (oldSceneRoundTripLoad(&file)) {
+			QString txt =
+				"Advanced Scene Switcher settings imported successfully!\n";
+			txt += "Please resave settings as support for old format will be dropped in next version.";
+			Msgbox.setText(txt);
+			Msgbox.exec();
+			close();
+		} else {
+			Msgbox.setText(
+				"Advanced Scene Switcher failed to import settings!");
+			Msgbox.exec();
+		}
 		return;
 	}
 	switcher->loadSceneRoundTripSwitches(obj);
@@ -175,7 +233,7 @@ void SceneSwitcher::on_sceneRoundTripLoad_clicked()
 
 	QMessageBox Msgbox;
 	Msgbox.setText(
-		"Advanced Scene Switcher settings imported successfully");
+		"Advanced Scene Switcher settings imported successfully!");
 	Msgbox.exec();
 	close();
 }