Christopher Wiebe
b451f83174
Captures the pre-Godot-port state of the codebase. This is the rollback anchor for the Godot port (M0 of theriapolis-rpg-implementation-plan-godot-port.md). All Phase 0 through Phase 6.5 work is included; Phase 7 is in flight. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
71 lines
2.8 KiB
C#
71 lines
2.8 KiB
C#
using Theriapolis.Core.Data;
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namespace Theriapolis.Core.Rules.Character;
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/// <summary>
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/// Phase 6.5 M2 — given a character's <see cref="ClassDef"/> + a chosen
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/// <c>subclassId</c>, look up the subclass-feature ids unlocked at a
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/// specific level. Used by <see cref="LevelUpFlow.Compute"/> to populate
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/// <see cref="LevelUpResult.SubclassFeaturesUnlocked"/>.
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///
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/// The resolver does NOT mutate state — it's a pure lookup. The
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/// <see cref="FeatureProcessor"/> takes the resulting feature ids and
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/// applies their mechanical effects at combat-resolution time.
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/// </summary>
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public static class SubclassResolver
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{
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/// <summary>
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/// Look up a subclass def by id from a content collection. Returns
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/// null if the id is empty or unknown — callers should treat that as
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/// "no subclass picked yet" (pre-L3) or "subclass content missing"
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/// (data error, log it).
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/// </summary>
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public static SubclassDef? TryFindSubclass(
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IReadOnlyDictionary<string, SubclassDef> subclasses,
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string? subclassId)
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{
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if (string.IsNullOrEmpty(subclassId)) return null;
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return subclasses.TryGetValue(subclassId, out var def) ? def : null;
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}
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/// <summary>
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/// Feature ids unlocked by the chosen subclass at <paramref name="level"/>.
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/// Returns an empty array if no subclass is picked, the subclass def is
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/// missing, or the level has no entry in <see cref="SubclassDef.LevelFeatures"/>.
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/// </summary>
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public static string[] UnlockedFeaturesAt(
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IReadOnlyDictionary<string, SubclassDef> subclasses,
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string? subclassId,
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int level)
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{
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var def = TryFindSubclass(subclasses, subclassId);
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if (def is null) return Array.Empty<string>();
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foreach (var entry in def.LevelFeatures)
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if (entry.Level == level)
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return entry.Features ?? Array.Empty<string>();
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return Array.Empty<string>();
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}
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/// <summary>
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/// Resolve a feature description (for display in the level-up screen
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/// and combat HUD tooltips). Looks first in the subclass's
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/// <see cref="SubclassDef.FeatureDefinitions"/>, then falls through to
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/// the parent class's
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/// <see cref="ClassDef.FeatureDefinitions"/> (in case the feature id is
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/// shared — e.g. <c>asi</c>, <c>extra_attack</c>). Returns null if neither
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/// has it.
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/// </summary>
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public static ClassFeatureDef? ResolveFeatureDef(
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ClassDef classDef,
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SubclassDef? subclass,
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string featureId)
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{
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if (subclass is not null
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&& subclass.FeatureDefinitions.TryGetValue(featureId, out var sdef))
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return sdef;
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if (classDef.FeatureDefinitions.TryGetValue(featureId, out var cdef))
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return cdef;
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return null;
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}
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}
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