X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fnet%2Fpterodactylus%2Fdemoscenemusic%2Fdata%2FDataManager.java;h=967faa5fecd042ee0c6bb53f40df485e2a923943;hb=747a5afddade17479a3d0e951c1e5ce51a3b7950;hp=ad01bfed79d7c7c561649aabaac3ed75baea347a;hpb=7bae34cd2768314df3c169da542c2403161be3a1;p=demoscenemusic.git

diff --git a/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java b/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java
index ad01bfe..967faa5 100644
--- a/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java
+++ b/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java
@@ -329,6 +329,24 @@ public class DataManager {
 	}
 
 	/**
+	 * Returns the track that contains the derivative with the given ID.
+	 *
+	 * @param id
+	 *            The ID of the track derivative
+	 * @return The track the derivative belongs to, or {@code null} if there is
+	 *         no such track
+	 * @throws DatabaseException
+	 *             if a database error occurs
+	 */
+	public Track getTrackByDerivativeId(String id) throws DatabaseException {
+		Query query = new Query(Type.SELECT, "TRACKS");
+		query.addField(new Field("TRACKS.*"));
+		query.addJoin(new Join(JoinType.INNER, "TRACK_DERIVATIVES", new Field("TRACK_DERIVATIVES.TRACK"), new Field("TRACKS.ID")));
+		query.addWhereClause(new ValueFieldWhereClause(new ValueField("TRACK_DERIVATIVES.ID", new StringParameter(id))));
+		return loadTrackProperties(database.getSingle(query, trackCreator));
+	}
+
+	/**
 	 * Returns all tracks by the artist with the given ID.
 	 *
 	 * @param artistId
@@ -515,6 +533,23 @@ public class DataManager {
 	}
 
 	/**
+	 * Removes the given track derivative and all its properties from the
+	 * database.
+	 *
+	 * @param trackDerivative
+	 *            The track derivative to remove
+	 * @throws DatabaseException
+	 *             if a database error occurs
+	 */
+	public void removeTrackDerivative(TrackDerivative trackDerivative) throws DatabaseException {
+		Query query = new Query(Type.DELETE, "TRACK_DERIVATIVES");
+		query.addWhereClause(new ValueFieldWhereClause(new ValueField("TRACK_DERIVATIVES.ID", new StringParameter(trackDerivative.getId()))));
+		database.update(query);
+		/* remove the properties. */
+		saveProperties(new Properties().set("dirty", "true").removeAll(), "TRACK_DERIVATIVE_PROPERTIES", "TRACK_DERIVATIVE", trackDerivative.getId());
+	}
+
+	/**
 	 * Returns all groups the artist with the given ID belongs to.
 	 *
 	 * @param artistId