From acabd0188f3bdbd5cc3e36176ab54db761fda05f Mon Sep 17 00:00:00 2001
From: kraxarn <kraxie@protonmail.com>
Date: Sat, 16 Dec 2023 16:12:11 +0100
Subject: [PATCH] Add option to ignore unavailable tracks, fixes #209

---
 lib/include/lib/settings/general.hpp |  5 +++++
 lib/src/settings/general.cpp         |  2 ++
 src/list/tracks.cpp                  | 28 ++++++++++++++++++++++++++++
 src/settingspage/application.cpp     | 11 +++++++++++
 src/settingspage/application.hpp     |  1 +
 5 files changed, 47 insertions(+)

diff --git a/lib/include/lib/settings/general.hpp b/lib/include/lib/settings/general.hpp
index 35377c40..41cd2930 100644
--- a/lib/include/lib/settings/general.hpp
+++ b/lib/include/lib/settings/general.hpp
@@ -141,6 +141,11 @@ namespace lib
 #ifdef _WIN32
 			bool media_hotkeys = true;
 #endif
+
+			/**
+			 * \brief Ignore index of unavailable tracks
+			 */
+			bool ignore_unavailable_index = false;
 		};
 
 		void to_json(nlohmann::json &j, const general &g);
diff --git a/lib/src/settings/general.cpp b/lib/src/settings/general.cpp
index e10f2511..90e247dd 100644
--- a/lib/src/settings/general.cpp
+++ b/lib/src/settings/general.cpp
@@ -8,6 +8,7 @@ void lib::setting::to_json(nlohmann::json &j, const general &g)
 		{"custom_playlist_order", g.custom_playlist_order},
 		{"fallback_icons", g.fallback_icons},
 		{"hidden_song_headers", g.hidden_song_headers},
+		{"ignore_unavailable_index", g.ignore_unavailable_index},
 		{"last_device", g.last_device},
 		{"last_playlist", g.last_playlist},
 		{"last_version", g.last_version},
@@ -45,6 +46,7 @@ void lib::setting::from_json(const nlohmann::json &j, general &g)
 	lib::json::get(j, "custom_playlist_order", g.custom_playlist_order);
 	lib::json::get(j, "fallback_icons", g.fallback_icons);
 	lib::json::get(j, "hidden_song_headers", g.hidden_song_headers);
+	lib::json::get(j, "ignore_unavailable_index", g.ignore_unavailable_index);
 	lib::json::get(j, "last_device", g.last_device);
 	lib::json::get(j, "last_playlist", g.last_playlist);
 	lib::json::get(j, "last_version", g.last_version);
diff --git a/src/list/tracks.cpp b/src/list/tracks.cpp
index c87fcdca..11ceeb56 100644
--- a/src/list/tracks.cpp
+++ b/src/list/tracks.cpp
@@ -177,6 +177,34 @@ void List::Tracks::onDoubleClicked(QTreeWidgetItem *item, int /*column*/)
 		return;
 	}
 
+	if (settings.general.ignore_unavailable_index)
+	{
+		auto modifier = 0;
+
+		for (auto i = 0; i < topLevelItemCount(); i++)
+		{
+			const auto *disabledItem = topLevelItem(i);
+			if (!disabledItem->isDisabled())
+			{
+				continue;
+			}
+
+			const auto &disabledIndexData = disabledItem->data(0, static_cast<int>(DataRole::Index));
+			const auto disabledIndex = disabledIndexData.toInt();
+
+			if (disabledIndex < trackIndex)
+			{
+				modifier++;
+			}
+		}
+
+		if (modifier > 0)
+		{
+			lib::log::debug("Ignoring {} unavailable tracks", modifier);
+			trackIndex -= modifier;
+		}
+	}
+
 	auto callback = [this, mainWindow, item](const std::string &status)
 	{
 		if (!status.empty())
diff --git a/src/settingspage/application.cpp b/src/settingspage/application.cpp
index 5888f8d2..fd4c6b2a 100644
--- a/src/settingspage/application.cpp
+++ b/src/settingspage/application.cpp
@@ -75,6 +75,12 @@ auto SettingsPage::Application::app() -> QWidget *
 	appUpdates->setChecked(settings.general.check_for_updates);
 	layout->addWidget(appUpdates);
 
+	ignoreUnavailableIndex = new QCheckBox(QStringLiteral("Ignore index of unavailable songs"), this);
+	ignoreUnavailableIndex->setToolTip(QStringLiteral("Ignore index of unavailable tracks, "
+		"required by some clients to properly index playlists with unavailable songs"));
+	ignoreUnavailableIndex->setChecked(settings.general.ignore_unavailable_index);
+	layout->addWidget(ignoreUnavailableIndex);
+
 	return Widget::layoutToWidget(layout, this);
 }
 
@@ -156,5 +162,10 @@ auto SettingsPage::Application::save() -> bool
 		settings.general.check_for_updates = appUpdates->isChecked();
 	}
 
+	if (ignoreUnavailableIndex != nullptr)
+	{
+		settings.general.ignore_unavailable_index = ignoreUnavailableIndex->isChecked();
+	}
+
 	return success;
 }
diff --git a/src/settingspage/application.hpp b/src/settingspage/application.hpp
index 43db276a..198398ec 100644
--- a/src/settingspage/application.hpp
+++ b/src/settingspage/application.hpp
@@ -23,6 +23,7 @@ namespace SettingsPage
 		QComboBox *appRefresh = nullptr;
 		QComboBox *appMaxQueue = nullptr;
 		QCheckBox *appUpdates = nullptr;
+		QCheckBox *ignoreUnavailableIndex = nullptr;
 
 		static constexpr int minRefreshInterval = 1;
 		static constexpr int maxRefreshInterval = 60;