+/**
+ * Notification callback for the moods table.
+ *
+ * \param event Type of the event just occurred.
+ * \param pb Unused.
+ * \param data Its type depends on the event.
+ *
+ * This function performs actions required due to the occurrence of the given
+ * event. Possible actions include reload of the current mood and update of the
+ * score of an audio file.
+ */