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34 lines
1.1 KiB
34 lines
1.1 KiB
import { CellValue } from "app/common/DocActions";
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// Filter object as stored in the db
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export interface FilterSpec {
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included?: CellValue[];
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excluded?: CellValue[];
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}
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// A more efficient representation of filter state for a column than FilterSpec.
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export interface FilterState {
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include: boolean;
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values: Set<CellValue>;
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}
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// Creates a FilterState. Accepts spec as a json string or a FilterSpec.
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export function makeFilterState(spec: string | FilterSpec): FilterState {
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if (typeof (spec) === 'string') {
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return makeFilterState((spec && JSON.parse(spec)) || {});
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}
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return {
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include: Boolean(spec.included),
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values: new Set(spec.included || spec.excluded || []),
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};
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}
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// Returns true if state and spec are equivalent, false otherwise.
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export function isEquivalentFilter(state: FilterState, spec: FilterSpec): boolean {
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const other = makeFilterState(spec);
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if (state.include !== other.include) { return false; }
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if (state.values.size !== other.values.size) { return false; }
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for (const val of other.values) { if (!state.values.has(val)) { return false; } }
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return true;
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}
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