add data reading & selection table population

Data/Song/Chart.cs

@@ -1,25 +0,0 @@
-using System;
-
-namespace MercuryConverter.Data;
-
-
-public class Chart
-{
-    public required string audioId;
-    public required string audioOffset;
-    public required string audioPreviewTime;
-    public required string audioPreviewDuration;
-    public required string video;
-    public required string designer;
-    public required string clearRequirement;
-    public required string diffLevel;
-    public string diffString
-    {
-        get
-        {
-            var d = Convert.ToDouble(diffLevel);
-            var i = (int)d;
-            return $"{(int)d}{(d > i ? "+" : "")}";
-        }
-    }
-}

Data/Song/Consts.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using SaturnData.Notation.Core;
 
 namespace MercuryConverter.Data;
 
@@ -20,7 +21,7 @@ public static class Consts
     };
     public static readonly IReadOnlyDictionary<int, string> CATEGORY_INDEX = _CATEGORY_INDEX;
 
-    private static Dictionary<int, string> _NUM_SOURCE = new()
+    private static Dictionary<uint, string> _NUM_SOURCE = new()
     {
         { 1, string.Concat(new int[] {87, 65, 67, 67, 65}.Select(i => Convert.ToChar(i))) },
         { 2, string.Concat(new int[] {87, 65, 67, 67, 65, 32, 83}.Select(i => Convert.ToChar(i))) },
@@ -28,11 +29,38 @@ public static class Consts
         { 4, string.Concat(new int[] {87, 65, 67, 67, 65, 32, 76, 73, 76, 89, 32, 82}.Select(i => Convert.ToChar(i))) },
         { 5, string.Concat(new int[] {87, 65, 67, 67, 65, 32, 82, 101, 118, 101, 114, 115, 101}.Select(i => Convert.ToChar(i))) }
     };
-    public static readonly IReadOnlyDictionary<int, string> NUM_SOURCE = _NUM_SOURCE;
-    public static readonly IReadOnlyDictionary<string, int> SOURCE_NUM = _NUM_SOURCE.ToDictionary(p => p.Value, p=>p.Key);
+    public static readonly IReadOnlyDictionary<uint, string> NUM_SOURCE = _NUM_SOURCE;
+    public static readonly IReadOnlyDictionary<string, uint> SOURCE_NUM = _NUM_SOURCE.ToDictionary(p => p.Value, p => p.Key);
 
     private static string[] _DIFFICULTIES = {
         "Normal", "Hard", "Expert", "Inferno"
     };
     public static readonly IReadOnlyList<string> DIFFICULTIES = _DIFFICULTIES;
+
+    private static readonly Dictionary<Difficulty, string> _DIFF_LVL_KEY = new()
+    {
+        {Difficulty.Normal, "DifficultyNormalLv"},
+        {Difficulty.Hard, "DifficultyHardLv"},
+        {Difficulty.Expert, "DifficultyExtremeLv"},
+        {Difficulty.Inferno, "DifficultyInfernoLv"},
+    };
+    public static readonly IReadOnlyDictionary<Difficulty, string> DIFF_LVL_KEY = _DIFF_LVL_KEY;
+
+    private static readonly Dictionary<Difficulty, string> _DIFF_FILENAME_PREPEND = 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;
+
+    private static readonly Dictionary<Difficulty, string> _DIFF_CLEAR_KEY = new()
+    {
+        {Difficulty.Normal, "ClearNormaRateNormal"},
+        {Difficulty.Hard, "ClearNormaRateHard"},
+        {Difficulty.Expert, "ClearNormaRateExtreme"},
+        {Difficulty.Inferno, "ClearNormaRateInferno"},
+    };
+    public static readonly IReadOnlyDictionary<Difficulty, string> DIFF_CLEAR_KEY = _DIFF_CLEAR_KEY;
 }

Data/Song/Song.cs

@@ -1,22 +1,29 @@
 using System;
 using System.Collections.Generic;
 using Avalonia.Media;
+using SaturnData.Notation.Core;
 
 namespace MercuryConverter.Data;
 
+/// <summary>
+/// Combining SaturnData's Entry & Chart.
+/// </summary>
 public class Song
 {
-    /// <summary>
-    /// Format: `Snn-nnn` where `n` is a digit.
-    /// </summary>
-    public required string Id { get; set;}
+    public required string Id { get; set; } // Snn-nnn
     public required string Name { get; set; }
     public required string Artist { get; set; }
-    public required string Source { get; set; }
-    public string rubi;
-    public string copyright;
-    public string tempo;
-    public int genreId;
-    public string jacket;
-    public Chart?[] charts = { null, null, null, null };
+    public required uint Source { get; set; }
+    public required string Rubi { 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];
+    
+
+    // TODO: For SaturnData.Entry instances, use this Guid format:
+    // MERCURY_[SONGID]_[DIFF] (each var is int)
+    public List<(Difficulty, Entry, Chart)> charts = new();
 }