60 lines
1.8 KiB
C#
60 lines
1.8 KiB
C#
using System.Collections.Concurrent;
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using Microsoft.Extensions.Options;
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namespace NeonSprawl.Server.Game.PositionState;
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/// <summary>Thread-safe in-memory positions; seeds the configured dev player on construction.</summary>
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public sealed class InMemoryPositionStateStore : IPositionStateStore
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{
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private readonly ConcurrentDictionary<string, PositionSnapshot> _positions = new(StringComparer.OrdinalIgnoreCase);
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public InMemoryPositionStateStore(IOptions<GamePositionOptions> options)
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{
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var o = options.Value;
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var id = o.DevPlayerId.Trim();
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if (id.Length == 0)
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throw new InvalidOperationException("Game:DevPlayerId must be non-empty.");
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var p = o.DefaultPosition ?? new DefaultPositionOptions();
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_positions[id] = new PositionSnapshot(p.X, p.Y, p.Z, 0);
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}
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public bool TryGetPosition(string playerId, out PositionSnapshot snapshot)
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{
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var key = playerId?.Trim();
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if (string.IsNullOrEmpty(key))
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{
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snapshot = default;
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return false;
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}
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return _positions.TryGetValue(key, out snapshot);
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}
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public bool TryApplyMoveTarget(string playerId, double x, double y, double z, out PositionSnapshot snapshot)
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{
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var key = playerId?.Trim();
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if (string.IsNullOrEmpty(key))
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{
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snapshot = default;
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return false;
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}
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while (true)
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{
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if (!_positions.TryGetValue(key, out var previous))
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{
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snapshot = default;
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return false;
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}
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var next = new PositionSnapshot(x, y, z, previous.Sequence + 1);
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if (_positions.TryUpdate(key, next, previous))
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{
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snapshot = next;
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return true;
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}
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}
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}
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}
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