Refactor the database code

osu.Game/Database/BeatmapInfo.cs

@@ -0,0 +1,63 @@
+using System;
+using System.Linq;
+using osu.Game.Beatmaps.Samples;
+using osu.Game.GameModes.Play;
+using SQLite.Net.Attributes;
+using SQLiteNetExtensions.Attributes;
+
+namespace osu.Game.Database
+{
+    public class BeatmapInfo
+    {
+        public BeatmapInfo()
+        {
+            BaseDifficulty = new BaseDifficulty();
+        }
+
+        [PrimaryKey]
+        public int BeatmapID { get; set; }
+        [NotNull, Indexed]
+        public int BeatmapSetID { get; set; }
+        [ForeignKey(typeof(BeatmapMetadata))]
+        public int BeatmapMetadataID { get; set; }
+        [ForeignKey(typeof(BaseDifficulty)), NotNull]
+        public int BaseDifficultyID { get; set; }
+        [OneToOne]
+        public BeatmapMetadata Metadata { get; set; }
+        [OneToOne]
+        public BaseDifficulty BaseDifficulty { get; set; }
+        
+        // General
+        public int AudioLeadIn { get; set; }
+        public bool Countdown { get; set; }
+        public SampleSet SampleSet { get; set; }
+        public float StackLeniency { get; set; }
+        public bool SpecialStyle { get; set; }
+        public PlayMode Mode { get; set; }
+        public bool LetterboxInBreaks { get; set; }
+        public bool WidescreenStoryboard { get; set; }
+        
+        // Editor
+        // This bookmarks stuff is necessary because DB doesn't know how to store int[]
+        public string StoredBookmarks { get; internal set; }
+        [Ignore]
+        public int[] Bookmarks
+        {
+            get
+            {
+                return StoredBookmarks.Split(',').Select(b => int.Parse(b)).ToArray();
+            }
+            set
+            {
+                StoredBookmarks = string.Join(",", value);
+            }
+        }
+        public double DistanceSpacing { get; set; }
+        public int BeatDivisor { get; set; }
+        public int GridSize { get; set; }
+        public double TimelineZoom { get; set; }
+        
+        // Metadata
+        public string Version { get; set; }
+    }
+}