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Implement native layout-3 save restoration

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This commit is contained in:
gamer147
2026-07-24 16:23:01 -04:00
parent 3b63c42826
commit 3ace5371e6
21 changed files with 1659 additions and 81 deletions
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38
engine/Age.Engine/Persistence/NativeDatStore.cs
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@@ -43,6 +43,8 @@ public sealed record NativeSaveIdentity(
}
}
public sealed record NativeNumberedSaveFile(NativeSaveDocument Document, byte[] HistoryTail);
public interface INativeDatStore
{
NativeSaveIdentity Identity { get; }
@@ -53,6 +55,15 @@ public interface INativeDatStore
NativeSaveMetadata? QueryNumberedMetadata(int slot);
NativeSaveDocument? LoadNumbered(int slot);
void SaveNumbered(int slot, ReadOnlySpan<byte> payload, NativeSystemTime timestamp, uint accumulatedPlaySeconds);
NativeNumberedSaveFile? LoadNumberedFile(int slot)
{
NativeSaveDocument? document = LoadNumbered(slot);
return document == null ? null : new NativeNumberedSaveFile(document, []);
}
void SaveNumberedFile(
int slot, ReadOnlySpan<byte> payload, ReadOnlySpan<byte> historyTail,
NativeSystemTime timestamp, uint accumulatedPlaySeconds)
=> SaveNumbered(slot, payload, timestamp, accumulatedPlaySeconds);
int DeleteNumberedPair(int slot);
int CopyNumberedPair(int sourceSlot, int destinationSlot);
byte[]? LoadNumberedThumbnail(int slot);
@@ -160,6 +171,17 @@ public sealed class DirectoryNativeDatStore : INativeDatStore
return File.Exists(path) ? LoadAndValidate(path, numbered: true) : null;
}
public NativeNumberedSaveFile? LoadNumberedFile(int slot)
{
string path = Path.Combine(_root, NumberedFileName(slot));
if (!File.Exists(path)) return null;
byte[] source = File.ReadAllBytes(path);
NativeSaveDocument document = NativeSaveContainerCodec.Decode(source);
_identity.Validate(document.Metadata, numbered: true);
return new NativeNumberedSaveFile(
document, source.AsSpan(document.BytesConsumed).ToArray());
}
public NativeSaveMetadata? QueryNumberedMetadata(int slot)
{
string path = Path.Combine(_root, NumberedFileName(slot));
@@ -186,6 +208,22 @@ public sealed class DirectoryNativeDatStore : INativeDatStore
WriteThrough(Path.Combine(_root, NumberedFileName(slot)), encoded);
}
public void SaveNumberedFile(
int slot,
ReadOnlySpan<byte> payload,
ReadOnlySpan<byte> historyTail,
NativeSystemTime timestamp,
uint accumulatedPlaySeconds)
{
byte[] container = NativeSaveContainerCodec.Encode(
payload, _identity.CreateMetadata(timestamp, accumulatedPlaySeconds, numbered: true));
byte[] encoded = new byte[checked(container.Length + historyTail.Length)];
container.CopyTo(encoded, 0);
historyTail.CopyTo(encoded.AsSpan(container.Length));
Directory.CreateDirectory(_root);
WriteThrough(Path.Combine(_root, NumberedFileName(slot)), encoded);
}
public int DeleteNumberedPair(int slot)
{
bool dataDeleted = TryDelete(Path.Combine(_root, NumberedFileName(slot)));