File size: 4,001 Bytes
3ce1a40 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 | using Repoverse.Core.Bridge;
using System.Text.Json;
using System.Text.Json.Nodes;
using Repoverse.Core.Generation;
using Repoverse.Core.Voxels;
namespace Repoverse.Core.Persistence;
public enum ViewMode { World, Code, Graph, Build, Cad, Audit, Agent }
public sealed record Bookmark(string Label, string Uri);
public sealed record PlayerState
{
public double X { get; init; }
public double Y { get; init; }
public double Z { get; init; }
public double Yaw { get; init; }
public ViewMode Mode { get; init; } = ViewMode.World;
/// <summary>repoverse:// URI of the current selection, if any.</summary>
public string? Selection { get; init; }
public IReadOnlyList<Bookmark> Bookmarks { get; init; } = [];
}
public sealed record ChunkEdits(string Chunk, IReadOnlyDictionary<int, ushort> Voxels);
/// <summary>
/// Versioned save (§42, §43). Holds player state and user modifications only;
/// canonical and generated state are rebuilt from the snapshot and manifest.
/// </summary>
public sealed record SaveGame
{
public const int CurrentSchema = 2;
public int SchemaVersion { get; init; } = CurrentSchema;
public required string WorldSeed { get; init; }
public required string Generator { get; init; }
public required IReadOnlyDictionary<string, string> Snapshots { get; init; }
public required PlayerState Player { get; init; }
public IReadOnlyList<ChunkEdits> Edits { get; init; } = [];
public long SimulationTick { get; init; }
public IReadOnlyList<BuilderState> Builders { get; init; } = [];
public static SaveGame Capture(WorldManifest manifest, PlayerState player, WorldEdits edits, long tick) => new()
{
WorldSeed = manifest.WorldSeed,
Generator = manifest.Generator,
Snapshots = manifest.Snapshots,
Player = player,
Edits = edits.Snapshot().OrderBy(kv => kv.Key.ToString(), StringComparer.Ordinal)
.Select(kv => new ChunkEdits(kv.Key.ToString(), kv.Value)).ToList(),
SimulationTick = tick,
};
public void RestoreEdits(WorldEdits edits) => edits.Load(Edits.ToDictionary(
e => { var p = e.Chunk.Split(','); return new ChunkCoord(int.Parse(p[0]), int.Parse(p[1]), int.Parse(p[2])); },
e => e.Voxels));
public static void Write(string path, SaveGame save)
{
var tmp = path + ".tmp";
File.WriteAllText(tmp, JsonSerializer.Serialize(save, Json.Options));
File.Move(tmp, path, overwrite: true);
}
public static SaveGame Read(string path) => Parse(File.ReadAllText(path));
public static SaveGame Parse(string json)
{
var node = JsonNode.Parse(json)?.AsObject() ?? throw new InvalidDataException("Save file is empty.");
var version = node["schemaVersion"]?.GetValue<int>() ?? 1;
if (version > CurrentSchema)
throw new InvalidDataException($"Save schema {version} is newer than this build supports ({CurrentSchema}).");
for (; version < CurrentSchema; version++) Migrations[version](node);
node["schemaVersion"] = CurrentSchema;
return node.Deserialize<SaveGame>(Json.Options) ?? throw new InvalidDataException("Save file could not be read.");
}
/// <summary>Migration from schema N to N+1, applied in order.</summary>
private static readonly Dictionary<int, Action<JsonObject>> Migrations = new()
{
// v1 kept "seed" and "cameraMode" and had no bookmarks or edits.
[1] = n =>
{
if (n["seed"] is { } seed) { n.Remove("seed"); n["worldSeed"] = seed.GetValue<string>(); }
n["generator"] ??= "repoverse-gen/0";
n["snapshots"] ??= new JsonObject();
if (n["player"] is JsonObject p)
{
if (p["cameraMode"] is { } mode) { p.Remove("cameraMode"); p["mode"] = mode.GetValue<string>(); }
p["bookmarks"] ??= new JsonArray();
}
n["edits"] ??= new JsonArray();
},
};
}
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