Read osu realm and get audio/bg hashes

Program.cs

// CollectionDowngrader.LazerSchema from https://github.com/ookiineko/CollectionDowngrader/tree/main/LazerSchema
using CollectionDowngrader.LazerSchema;
using Realms;

// Console.WriteLine($"cwd: {Environment.CurrentDirectory}");
const int LazerSchemaVersion = 41;
string realmFile = Path.GetFullPath("./client.realm");
RealmConfiguration config = new(realmFile)
{
    IsReadOnly = true,
    SchemaVersion = LazerSchemaVersion,
    Schema = new[] {
    typeof(Beatmap),
    typeof(BeatmapCollection),
    typeof(BeatmapDifficulty),
    typeof(BeatmapMetadata),
    typeof(BeatmapSet),
    typeof(BeatmapUserSettings),
    typeof(RealmFile),
    typeof(RealmNamedFileUsage),
    typeof(RealmUser),
    typeof(Ruleset),
    typeof(ModPreset)
}
};

Realm db = Realm.GetInstance(config);
List<BeatmapCollection> collections = [.. db.All<BeatmapCollection>()];
Console.WriteLine($"Loaded {collections.Count} collections");

foreach (BeatmapCollection collection in collections) {
    Console.WriteLine($"Collection: {collection.Name}, with {collection.BeatmapMD5Hashes.Count} difficulties");
    foreach (string hash in collection.BeatmapMD5Hashes) {
        Console.WriteLine($"  {hash}");
        // Search for the beatmap with this hash
        var beatmaps = db.All<Beatmap>().Where(b => b.MD5Hash == hash).ToList();
        foreach (Beatmap beatmap in beatmaps) {
            if (beatmap.BeatmapSet == null) {
                continue;
            }
            Console.WriteLine($"    Beatmap: {beatmap.Metadata.Artist} - {beatmap.Metadata.Title} [{beatmap.DifficultyName}] {beatmap.MD5Hash}");
            // Console.WriteLine($"      Audio: {beatmap.Metadata.AudioFile}, BG: {beatmap.Metadata.BackgroundFile}");
            var audioName = beatmap.Metadata.AudioFile;
            var bgName = beatmap.Metadata.BackgroundFile;
            var files = beatmap.BeatmapSet.Files;
            foreach (RealmNamedFileUsage file in files) {
                if (file.Filename == audioName) {
                    Console.WriteLine($"      Audio: {file.Filename} ({file.File.Hash})");
                }
                if (file.Filename == bgName) {
                    Console.WriteLine($"      BG: {file.Filename} ({file.File.Hash})");
                }
                // Console.WriteLine($"      File: {file.Filename} ({file.File.Hash})");
            }
        }
    }
}

// foreach (Beatmap beatmap in db.All<Beatmap>()) {
//     Console.WriteLine($"Beatmap: {beatmap.Metadata.Artist} - {beatmap.Metadata.Title} [{beatmap.DifficultyName}] {beatmap.MD5Hash}");
// }