42 lines
1.7 KiB
C#
42 lines
1.7 KiB
C#
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using System.Collections.Generic;
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namespace Theriapolis.GodotHost.UI;
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/// <summary>
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/// Per-background availability rules — which backgrounds are visible /
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/// pickable for a given <see cref="CharacterDraft"/>. The
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/// backgrounds.json schema doesn't carry restriction fields (gating
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/// lives in flavor text), so they're hardcoded here.
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///
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/// Used by StepBackground to filter the visible card list and by
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/// StepClade to clear the currently-selected background when a clade
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/// change makes it no longer valid (e.g. picking a non-canid lineage
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/// while Pack-Raised is selected).
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/// </summary>
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public static class BackgroundAvailability
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{
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private static readonly Dictionary<string, System.Func<CharacterDraft, bool>> Rules = new()
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{
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// Hybrid-only backgrounds — flavor text explicitly hybrid.
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{ "passer", d => d.IsHybrid },
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{ "hybrid_underground", d => d.IsHybrid },
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{ "former_chattel", d => d.IsHybrid },
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// Clade-restricted backgrounds.
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{ "warren_runner", d => d.HasClade("leporidae") },
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{ "pack_raised", d => d.HasClade("canidae") },
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{ "herd_city_born", d => d.HasAnyCladeOfKind("prey") },
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};
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/// <summary>True if the background id can be picked under the given
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/// draft state. Backgrounds not in the rules table are universally
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/// available; the empty id is also "available" (means no
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/// background selected).</summary>
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public static bool IsAvailable(string backgroundId, CharacterDraft draft)
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{
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if (string.IsNullOrEmpty(backgroundId)) return true;
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if (!Rules.TryGetValue(backgroundId, out var rule)) return true;
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return rule(draft);
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}
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}
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