58 lines
2.3 KiB
C#
58 lines
2.3 KiB
C#
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namespace Theriapolis.Core.Tactical;
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/// <summary>
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/// Persists per-chunk player-caused modifications (chopped trees, dropped items,
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/// emptied bandit camps). Implementations: in-memory (Phase 4 tests + runtime
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/// cache), MessagePack-backed (Phase 4 save body — see <see cref="ChunkDelta"/>).
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/// </summary>
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public interface IChunkDeltaStore
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{
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/// <summary>Returns the delta for a chunk, or null if no modifications recorded.</summary>
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ChunkDelta? Get(ChunkCoord cc);
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/// <summary>Records a chunk's delta. Overwrites any existing entry.</summary>
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void Put(ChunkCoord cc, ChunkDelta delta);
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/// <summary>Erases a chunk's delta — the chunk reverts to its deterministic baseline.</summary>
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void Remove(ChunkCoord cc);
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/// <summary>Snapshot of every recorded delta, used by SaveCodec to flush the world.</summary>
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IReadOnlyDictionary<ChunkCoord, ChunkDelta> All { get; }
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}
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/// <summary>
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/// Sparse delta for a single chunk: just the tactical-tile cells that diverge
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/// from <see cref="TacticalChunkGen.Generate"/>'s output. Phase 4 stores both
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/// the surface and the deco; richer per-tile state arrives later.
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/// </summary>
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public sealed class ChunkDelta
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{
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public List<TileMod> TileMods { get; } = new();
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/// <summary>True if the spawn list has been consumed (all spawns cleared).</summary>
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public bool SpawnsConsumed { get; set; }
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}
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public readonly struct TileMod
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{
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public readonly byte LocalX;
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public readonly byte LocalY;
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public readonly TacticalSurface Surface;
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public readonly TacticalDeco Deco;
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public readonly byte Flags;
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public TileMod(int lx, int ly, TacticalSurface s, TacticalDeco d, byte f)
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{
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LocalX = (byte)lx; LocalY = (byte)ly; Surface = s; Deco = d; Flags = f;
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}
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}
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/// <summary>Trivial in-memory implementation. Used by tests and at runtime before save.</summary>
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public sealed class InMemoryChunkDeltaStore : IChunkDeltaStore
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{
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private readonly Dictionary<ChunkCoord, ChunkDelta> _store = new();
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public ChunkDelta? Get(ChunkCoord cc) => _store.TryGetValue(cc, out var d) ? d : null;
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public void Put(ChunkCoord cc, ChunkDelta delta) => _store[cc] = delta;
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public void Remove(ChunkCoord cc) => _store.Remove(cc);
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public IReadOnlyDictionary<ChunkCoord, ChunkDelta> All => _store;
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}
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