38 lines
1.1 KiB
TypeScript
38 lines
1.1 KiB
TypeScript
import { location, splitLocation } from './board';
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/** Structural public input: no token identity, value, inventory or reserves. */
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export type ForcePresence = {
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forces: Readonly<Record<string, number>>;
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noField?: {
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deployed: {
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location: { territory: string; sector: number };
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} | null;
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} | null;
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};
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/** Effective board presence; physical casualty/transport counts still use forces. */
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export function presenceAt(player: ForcePresence, territory: string): number {
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const actual = Object.entries(player.forces).reduce(
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(total, [key, count]) =>
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total + (splitLocation(key).territory === territory ? count : 0),
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0,
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);
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return (
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actual +
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(player.noField?.deployed?.location.territory === territory ? 1 : 0)
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);
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}
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/** A fresh location map, with the single hidden marker represented as one. */
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export function presenceByLocation(
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player: ForcePresence,
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): Record<string, number> {
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const counts = { ...player.forces };
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const marker = player.noField?.deployed?.location;
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if (marker) {
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const key = location(marker.territory, marker.sector);
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counts[key] = (counts[key] ?? 0) + 1;
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}
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return counts;
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}
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