move EntryChart creation function

src/Data/Database.cs

@@ -55,10 +55,12 @@ public static class Database
                     Artist = data["ArtistMessage"].ToString()!,
                     Genre = ((IntPropertyData)data["ScoreGenre"]).Value,
                     Source = ((UInt32PropertyData)data["VersionNo"]).Value,
+                    BpmMessage = data["Bpm"].ToString()!,
                     PreviewTime = previewBegin,
                     PreviewLen = previewLen,
                     Jacket = File.Exists(jacketPath) ? jacketPath : null,
                     Copyright = (cTxt == "-" || cTxt == "") ? null : cTxt,
+                    assetData = data,
                 };
 
                 foreach (Difficulty diff in Enum.GetValues(typeof(Difficulty)))
@@ -70,7 +72,7 @@ public static class Database
                     if (lvl == 0) continue; // skip nonexistent level
 
                     // check chart existence
-                    var chartFilePath = Path.Combine(dataPath, "MusicData", song.Id, $"{song.Id}_{Consts.DIFF_FILENAME_PREPEND[diff]}.mer");
+                    var chartFilePath = Path.Combine(dataPath, "MusicData", song.Id, $"{song.Id}_{Consts.DIFF_FILENAME_APPEND[diff]}.mer");
                     if (!File.Exists(chartFilePath))
                     {
                         // TODO: add warning message to DataScan
@@ -78,8 +80,7 @@ public static class Database
                         continue;
                     }
 
-                    // TODO: check audio existence; add warning but don't skip
-
+                    // TODO: check audio existence; add warning but don't skip if missing
                     song.Levels[(int)diff] = (lvl, data[Consts.DIFF_DESIGNER_KEY[diff]].ToString()!);
                 }
 
@@ -92,28 +93,4 @@ public static class Database
         }
         Console.WriteLine("finished music table");
     }
-
-    private static (Entry, Chart)? GetDiffPair(string dataPath, StructPropertyData song, Difficulty diff)
-    {
-        var level = ((FloatPropertyData)song[Consts.DIFF_LVL_KEY[diff]]).Value;
-        if (level == 0)
-            return null;
-
-        var id = song["AssetDirectory"].ToString()!;
-        var chartFilePath = Path.Combine(dataPath, "MusicData", id, $"{id}_{Consts.DIFF_FILENAME_PREPEND[diff]}.mer");
-        var clearThreshold = ((FloatPropertyData)song[Consts.DIFF_CLEAR_KEY[diff]]).Value;
-
-        var e = NotationSerializer.ToEntry(chartFilePath, new NotationReadArgs
-        {
-            InferClearThresholdFromDifficulty = false
-        });
-        e.ClearThreshold = clearThreshold;
-        e.Difficulty = diff;
-        var c = NotationSerializer.ToChart(chartFilePath, new NotationReadArgs
-        {
-            InferClearThresholdFromDifficulty = false
-        });
-
-        return (e, c);
-    }
 }

src/Data/Song/Consts.cs

@@ -41,14 +41,14 @@ public static class Consts
     };
     public static readonly IReadOnlyDictionary<Difficulty, string> DIFF_LVL_KEY = _DIFF_LVL_KEY;
 
-    private static readonly Dictionary<Difficulty, string> _DIFF_FILENAME_PREPEND = new()
+    private static readonly Dictionary<Difficulty, string> _DIFF_FILENAME_APPEND = new()
     {
         {Difficulty.Normal, "00"},
         {Difficulty.Hard, "01"},
         {Difficulty.Expert, "02"},
         {Difficulty.Inferno, "03"},
     };
-    public static readonly IReadOnlyDictionary<Difficulty, string> DIFF_FILENAME_PREPEND = _DIFF_FILENAME_PREPEND;
+    public static readonly IReadOnlyDictionary<Difficulty, string> DIFF_FILENAME_APPEND = _DIFF_FILENAME_APPEND;
 
     private static readonly Dictionary<Difficulty, string> _DIFF_CLEAR_KEY = new()
     {

src/Data/Song/Song.cs

@@ -1,8 +1,13 @@
 using System;
 using System.Collections.Generic;
+using System.IO;
+using System.Linq;
 using Avalonia.Controls;
 using Avalonia.Media;
 using SaturnData.Notation.Core;
+using SaturnData.Notation.Serialization;
+using UAssetAPI.PropertyTypes.Objects;
+using UAssetAPI.PropertyTypes.Structs;
 
 namespace MercuryConverter.Data;
 
@@ -16,15 +21,89 @@ public class Song
     public required string Artist { get; set; }
     public required uint Source { get; set; }
     public required string Rubi { get; set; }
+    public required string BpmMessage { get; set; }
     public string? Copyright { get; set; } // May have never been used?
     public required int Genre { get; set; }
     public required string? Jacket { get; set; }
     public required float PreviewTime { get; set; }
     public required float PreviewLen { get; set; }
     public string SourceName => Consts.NUM_SOURCE[Source];
+
+    /// <summary>
+    /// Pairs of level and chart designer.
+    /// </summary>
     public (float, string)?[] Levels { get; set; } = { null, null, null, null };
+    public required StructPropertyData assetData;
+    /**
+    ========= Setting Background =========
+    By default it's set to BackgroundOption.Auto which reacts to the difficulty:
+    Nrm/Hrd/Exp = Standard Reverse (will be replaced by standard saturn bg once i make that)
+
+    For Inferno, always set the background to BackgroundOption.Boss
+
+    For all other diffs:
+    Source 1/2 should be BackgroundOption.Version1
+
+    Source 3/4 should be BackgroundOption.Version2
+
+    Source 5/Plus (whatever that is) should be BackgroundOption.Version3
 
 
-    // TODO: For SaturnData.Entry instances, use this Guid format:
-    // MERCURY_[SONGID]_[DIFF] (each var is int)
+    ========= Entry.Guid format =========
+    MERCURY_[SONGID]_[DIFF] (each var is int)
+    */
+    public IEnumerable<(Entry, Chart)> GetEntryCharts(string dataPath)
+    {
+        List<(Entry, Chart)> ret = new();
+
+        for (int i = 0; i < 4; ++i)
+        {
+            var l = Levels[i];
+            if (l == null) continue;
+
+            var diff = (Difficulty)i;
+
+            var chartFilePath = Path.Combine(dataPath, "MusicData", Id, $"{Id}_{Consts.DIFF_FILENAME_APPEND[diff]}.mer");
+            var clearThreshold = ((FloatPropertyData)assetData[Consts.DIFF_CLEAR_KEY[diff]]).Value;
+
+            var e = NotationSerializer.ToEntry(chartFilePath, new NotationReadArgs
+            {
+                InferClearThresholdFromDifficulty = false,
+            });
+            e.Title = Name;
+            e.Reading = Rubi;
+            e.Artist = Artist;
+            e.BpmMessage = BpmMessage;
+            e.PreviewBegin = PreviewTime;
+            e.PreviewLength = PreviewLen;
+            e.ClearThreshold = clearThreshold;
+            e.Difficulty = diff;
+            e.Level = l.Value.Item1;
+            e.NotesDesigner = l.Value.Item2;
+            e.JacketPath = Path.GetFileName(Jacket)!;
+
+            // TODO: video
+
+            var uid = ((UInt32PropertyData)assetData["UniqueID"]).Value;
+            e.Guid = $"MERCURY_{uid}_0{(int)diff}";
+
+            if (new List<uint> { 1, 2 }.Contains(Source))
+            {
+                e.Background = BackgroundOption.Version1;
+            }
+            else if (new List<uint> { 3, 4 }.Contains(Source))
+            {
+                e.Background = BackgroundOption.Version2;
+            }
+            else if (Source == 5)
+            {
+                e.Background = BackgroundOption.Version3;
+            }
+
+            var c = NotationSerializer.ToChart(chartFilePath, new NotationReadArgs { });
+            ret.Add((e, c));
+        }
+
+        return ret;
+    }
 }