28 lines
1004 B
TypeScript
28 lines
1004 B
TypeScript
import type { SessionState } from "../shared/types";
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/**
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* Drop selected ids whose package OR item no longer exists in the session.
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* The selection set mixes package and item ids; when entries vanish (delta
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* removal, backup-driven session swap, completed-cleanup) a stale id would
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* otherwise inflate the selection count and the "(N)" action labels and keep
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* "multi" styling alive for ghosts.
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*
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* Returns the SAME set instance when nothing changed, so callers can use it
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* directly as a React state updater without forcing a re-render.
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*/
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export function pruneSelection(
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selected: ReadonlySet<string>,
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session: Pick<SessionState, "packages" | "items">
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): Set<string> {
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if (selected.size === 0) {
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return selected as Set<string>;
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}
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const next = new Set<string>();
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for (const id of selected) {
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if (session.packages[id] || session.items[id]) {
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next.add(id);
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}
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}
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return next.size === selected.size ? (selected as Set<string>) : next;
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}
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