75 lines
2.5 KiB
C#
75 lines
2.5 KiB
C#
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namespace Theriapolis.Core.Rules.Reputation;
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/// <summary>
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/// Phase 6 M2 — append-only event log surfaced by the reputation screen
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/// ("why does so-and-so hate me?"). Bounded to a reasonable tail so the
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/// save file stays small even after a 100-hour playthrough.
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///
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/// Phase 6 M5 layers propagation on top: each entry will be re-walked
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/// per game-day to fan out into other settlements with distance/time
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/// decay.
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/// </summary>
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public sealed class RepLedger
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{
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public const int MaxEntries = 256;
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private readonly List<RepEvent> _entries = new();
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private int _nextSeq = 1;
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public IReadOnlyList<RepEvent> Entries => _entries;
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public int Count => _entries.Count;
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/// <summary>
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/// Append <paramref name="ev"/> to the ledger. If <see cref="RepEvent.SequenceId"/>
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/// is 0, a fresh monotone id is assigned; otherwise the supplied id
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/// is preserved (used by the save-restore path).
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/// </summary>
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public RepEvent Append(RepEvent ev)
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{
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if (ev.SequenceId == 0)
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ev = ev with { SequenceId = _nextSeq++ };
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else if (ev.SequenceId >= _nextSeq)
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_nextSeq = ev.SequenceId + 1;
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_entries.Add(ev);
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if (_entries.Count > MaxEntries) _entries.RemoveAt(0);
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return ev;
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}
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public void Clear()
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{
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_entries.Clear();
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_nextSeq = 1;
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}
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/// <summary>Largest <see cref="RepEvent.SequenceId"/> issued so far. 0 = empty ledger.</summary>
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public int HighestSequenceId => _nextSeq - 1;
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/// <summary>Most recent N events affecting <paramref name="factionId"/>.</summary>
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public IEnumerable<RepEvent> ForFaction(string factionId, int count = 8)
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{
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int yielded = 0;
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for (int i = _entries.Count - 1; i >= 0 && yielded < count; i--)
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{
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if (string.Equals(_entries[i].FactionId, factionId, System.StringComparison.OrdinalIgnoreCase))
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{
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yielded++;
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yield return _entries[i];
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}
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}
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}
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/// <summary>Most recent N events affecting <paramref name="roleTag"/>.</summary>
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public IEnumerable<RepEvent> ForRole(string roleTag, int count = 8)
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{
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int yielded = 0;
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for (int i = _entries.Count - 1; i >= 0 && yielded < count; i--)
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{
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if (string.Equals(_entries[i].RoleTag, roleTag, System.StringComparison.OrdinalIgnoreCase))
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{
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yielded++;
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yield return _entries[i];
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}
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}
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}
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}
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