Adding basic radio mode

src/database/Cluster.cpp

@@ -57,6 +57,24 @@ Cluster::getById(Wt::Dbo::Session& session, IdType id)
 	return session.find<Cluster>().where("id = ?").bind(id);
 }
 
+void
+Cluster::addTrack(Wt::Dbo::ptr<Track> track)
+{
+	_tracks.insert(track);
+}
+
+std::vector<Wt::Dbo::ptr<Track>>
+Cluster::getTracks(int offset, int limit) const
+{
+	Wt::Dbo::collection<Track::pointer> res = session()->query<Track::pointer>("select t from track t INNER JOIN cluster c ON c.id = t_c.cluster_id INNER JOIN track_cluster t_c ON t_c.track_id = t.id")
+						.where("c.id = ?").bind(self()->id())
+						.offset(offset)
+						.limit(limit);
+
+	return std::vector<Wt::Dbo::ptr<Track>>(res.begin(), res.end());
+}
+
+
 ClusterType::ClusterType(std::string name)
 	: _name(name)
 {
@@ -117,11 +135,6 @@ ClusterType::getClusters() const
 	return std::vector<Cluster::pointer>(res.begin(), res.end());
 }
 
-void
-Cluster::addTrack(Wt::Dbo::ptr<Track> track)
-{
-	_tracks.insert(track);
-}
 
 } // namespace Database
 

src/database/Cluster.hpp

@@ -53,6 +53,8 @@ class Cluster : public Wt::Dbo::Dbo<Cluster>
 		const std::string& getName(void) const { return _name; }
 		Wt::Dbo::ptr<ClusterType> getType() const { return _clusterType; }
 		const Wt::Dbo::collection<Wt::Dbo::ptr<Track>>& getTracks() const { return _tracks; }
+		std::size_t getTrackCount() const { return _tracks.size(); }
+		std::vector<Wt::Dbo::ptr<Track>> getTracks(int offset, int limit) const;
 
 		void addTrack(Wt::Dbo::ptr<Track> track);
 

src/database/Playlist.cpp

@@ -20,6 +20,7 @@
 
 #include <cassert>
 
+#include "Cluster.hpp"
 #include "User.hpp"
 #include "Track.hpp"
 
@@ -50,7 +51,7 @@ PlaylistEntry::PlaylistEntry()
 }
 
 PlaylistEntry::pointer
-PlaylistEntry::getById(Wt::Dbo::Session& session, PlaylistEntry::id_type id)
+PlaylistEntry::getById(Wt::Dbo::Session& session, IdType id)
 {
 	return session.find<PlaylistEntry>().where("id = ?").bind(id);
 }
@@ -133,4 +134,31 @@ Playlist::getCount() const
 	return _entries.size();
 }
 
+std::vector<Wt::Dbo::ptr<Cluster>>
+Playlist::getClusters() const
+{
+	assert(session());
+	assert(IdIsValid(self()->id()));
+
+	Wt::Dbo::collection<Cluster::pointer> res = session()->query<Cluster::pointer>("SELECT c from cluster c INNER JOIN track t ON c.id = t_c.cluster_id INNER JOIN track_cluster t_c ON t_c.track_id = t.id INNER JOIN playlist_entry p_e ON p_e.track_id = t.id INNER JOIN playlist p ON p.id = p_e.playlist_id")
+		.where("p.id = ?").bind(self()->id())
+		.groupBy("c.id")
+		.orderBy("COUNT(c.id) DESC");
+
+	return std::vector<Wt::Dbo::ptr<Cluster>>(res.begin(), res.end());
+}
+
+bool
+Playlist::hasTrack(IdType trackId) const
+{
+	assert(session());
+	assert(IdIsValid(self()->id()));
+
+	Wt::Dbo::collection<PlaylistEntry::pointer> res = session()->query<PlaylistEntry::pointer>("SELECT p_e from playlist_entry p_e INNER JOIN playlist p ON p_e.playlist_id = p.id")
+		.where("p_e.track_id = ?").bind(trackId);
+
+	return res.size() > 0;
+}
+
+
 } // namespace Database

src/database/Playlist.hpp

@@ -23,11 +23,14 @@
 
 #include <string>
 
+#include "Types.hpp"
+
 namespace Database {
 
 class PlaylistEntry;
 class User;
 class Track;
+class Cluster;
 
 class Playlist : public Wt::Dbo::Dbo<Playlist>
 {
@@ -56,6 +59,11 @@ class Playlist : public Wt::Dbo::Dbo<Playlist>
 		Wt::Dbo::ptr<PlaylistEntry> getEntry(std::size_t pos) const;
 		std::vector<Wt::Dbo::ptr<PlaylistEntry>> getEntries(int offset, int size, bool& moreResults) const;
 
+		// Get clusters, order by occurence
+		std::vector<Wt::Dbo::ptr<Cluster>> getClusters() const;
+
+		bool hasTrack(IdType trackId) const;
+
 		template<class Action>
 		void persist(Action& a)
 		{
@@ -79,12 +87,11 @@ class PlaylistEntry
 	public:
 
 		using pointer = Wt::Dbo::ptr<PlaylistEntry>;
-		using id_type = Wt::Dbo::dbo_traits<PlaylistEntry>::IdType;
 
 		PlaylistEntry();
 		PlaylistEntry(Wt::Dbo::ptr<Track> track, Wt::Dbo::ptr<Playlist> playlist);
 
-		static pointer getById(Wt::Dbo::Session& session, id_type id);
+		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);