Added a playque shuffle

approot/playqueue.xml

@@ -6,11 +6,16 @@
 	<i class="fa fa-times-circle"></i>
 </message>
 
+<message id="Lms.PlayQueue.shuffle">
+	<i class="fa fa-random"></i>
+</message>
+
 <message id="Lms.PlayQueue.template">
 	<div class="page-header">
 		<h2>${tr:Lms.PlayQueue.playqueue}</h2>
 		<small>${nb-tracks}</small>
 		${clear-btn}
+		${shuffle-btn}
 		${radio-mode}
 	</div>
 	${entries}

src/database/Playlist.cpp

@@ -19,6 +19,7 @@
 #include "Playlist.hpp"
 
 #include <cassert>
+#include <random>
 
 #include "Cluster.hpp"
 #include "User.hpp"
@@ -115,6 +116,13 @@ Playlist::getEntries(int offset, int size, bool& moreResults) const
 	return res;
 }
 
+std::vector<Wt::Dbo::ptr<PlaylistEntry>>
+Playlist::getAllEntries() const
+{
+	bool moreResults;
+	return getEntries(-1, -1, moreResults);
+}
+
 Wt::Dbo::ptr<PlaylistEntry>
 Playlist::getEntry(std::size_t pos) const
 {
@@ -171,8 +179,23 @@ Playlist::getTrackIds() const
 		.where("p.id = ?").bind(self()->id());
 
 	return std::vector<IdType>(res.begin(), res.end());
-
 }
 
+void
+Playlist::shuffle()
+{
+	assert(session());
+
+	auto entries = getAllEntries();
+
+	auto now = std::chrono::system_clock::now();
+	std::mt19937 randGenerator(std::chrono::duration_cast<std::chrono::milliseconds>(now.time_since_epoch()).count());
+
+	std::shuffle(entries.begin(), entries.end(), randGenerator);
+
+	clear();
+	for (auto entry : entries)
+		PlaylistEntry::create(*session(), entry->getTrack(), self());
+}
 
 } // namespace Database

src/database/Playlist.hpp

@@ -53,11 +53,14 @@ class Playlist : public Wt::Dbo::Dbo<Playlist>
 
 		// Modifiers
 		void clear() { _entries.clear(); }
+		void shuffle();
 
 		// Get tracks, ordered by position
 		std::size_t getCount() const;
 		Wt::Dbo::ptr<PlaylistEntry> getEntry(std::size_t pos) const;
 		std::vector<Wt::Dbo::ptr<PlaylistEntry>> getEntries(int offset, int size, bool& moreResults) const;
+		std::vector<Wt::Dbo::ptr<PlaylistEntry>> getAllEntries() const;
+
 		std::vector<IdType> getTrackIds() const;
 
 		// Get clusters, order by occurence
@@ -95,7 +98,7 @@ class PlaylistEntry
 		static pointer getById(Wt::Dbo::Session& session, IdType id);
 
 		// Create utility
-		static pointer	create(Wt::Dbo::Session& session, Wt::Dbo::ptr<Track> track, Wt::Dbo::ptr<Playlist> playlist);
+		static pointer create(Wt::Dbo::Session& session, Wt::Dbo::ptr<Track> track, Wt::Dbo::ptr<Playlist> playlist);
 
 		// Accessors
 		Wt::Dbo::ptr<Track>	getTrack() const { return _track; }

src/ui/PlayQueueView.cpp

@@ -50,6 +50,7 @@ PlayQueue::PlayQueue()
 	_showMore->addFunction("tr", &Wt::WTemplate::Functions::tr);
 	_showMore->setHidden(true);
 
+	Wt::WText* shuffleBtn = bindNew<Wt::WText>("shuffle-btn", Wt::WString::tr("Lms.PlayQueue.shuffle"), Wt::TextFormat::XHTML);
 	_radioMode = bindNew<Wt::WCheckBox>("radio-mode", Wt::WString::tr("Lms.PlayQueue.radio-mode"));
 
 	_nbTracks = bindNew<Wt::WText>("nb-tracks");
@@ -78,6 +79,18 @@ PlayQueue::PlayQueue()
 		updateInfo();
 	}));
 
+	shuffleBtn->clicked().connect([=]
+	{
+		{
+			Wt::Dbo::Transaction transaction(LmsApp->getDboSession());
+
+			auto playlist = Database::Playlist::get(LmsApp->getDboSession(), currentPlayQueueName, LmsApp->getCurrentUser());
+			playlist.modify()->shuffle();
+		}
+		_entriesContainer->clear();
+		addSome();
+	});
+
 	_showMore->clicked().connect(std::bind([=]
 	{
 		addSome();