26 lines
670 B
TypeScript
26 lines
670 B
TypeScript
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export type KeyType = string | number;
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type ValueType = [number, any]; // [times, realValue]
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class Entity {
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/** @private Internal cache map. Do not access this directly */
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cache = new Map<string, ValueType>();
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get(keys: KeyType[]): ValueType | null {
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return this.cache.get(keys.join('%')) || null;
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}
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update(keys: KeyType[], valueFn: (origin: ValueType | null) => ValueType | null) {
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const path = keys.join('%');
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const prevValue = this.cache.get(path)!;
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const nextValue = valueFn(prevValue);
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if (nextValue === null) {
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this.cache.delete(path);
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} else {
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this.cache.set(path, nextValue);
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}
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}
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}
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export default Entity;
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