Add method to get all tracks for an artist.

diff --git a/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java b/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java
index 520a3d9..23159df 100644 (file)
--- a/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java
+++ b/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java
@@ -97,11 +97,34 @@ public class DataManager {
                return trackLoader.get();
        }
 
+       public Collection<Track> getTracksByArtist(String artistId) throws DatabaseException {
+               Query query = new Query(Type.SELECT, "TRACKS");
+               query.addField(new Field("TRACKS.*"));
+               query.addField(new Field("TRACK_ARTISTS.*"));
+               query.addField(new Field("ARTISTS.*"));
+               query.addField(new Field("TRACK_STYLES.*"));
+               query.addField(new Field("STYLES.*"));
+               query.addJoin(new Join(JoinType.INNER, "TRACK_ARTISTS", new Field("TRACKS.ID"), new Field("TRACK_ARTISTS.TRACK")));
+               query.addJoin(new Join(JoinType.INNER, "ARTISTS", new Field("TRACK_ARTISTS.ARTIST"), new Field("ARTISTS.ID")));
+               query.addJoin(new Join(JoinType.INNER, "TRACK_STYLES", new Field("TRACKS.ID"), new Field("TRACK_STYLES.TRACK")));
+               query.addJoin(new Join(JoinType.INNER, "STYLES", new Field("TRACK_STYLES.STYLE"), new Field("STYLES.ID")));
+               query.addWhereClause(new ValueFieldWhereClause(new ValueField("ARTISTS.ID", new StringParameter(artistId))));
+               query.addOrderField(new OrderField(new Field("TRACKS.ID"), Order.ASCENDING));
+               query.addOrderField(new OrderField(new Field("TRACK_ARTISTS.DISPLAY_ORDER"), Order.ASCENDING));
+               TrackLoader trackLoader = new TrackLoader();
+               database.process(query, trackLoader);
+               return trackLoader.all();
+       }
+
        private class TrackLoader implements ResultProcessor {
 
                private final List<Track> loadedTracks = new ArrayList<Track>();
                private Track track;
 
+               public List<Track> all() {
+                       return loadedTracks;
+               }
+
                /**
                 * {@inheritDoc}
                 */