38 lines
1.3 KiB
JavaScript
38 lines
1.3 KiB
JavaScript
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'use strict';
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Object.defineProperty(exports, '__esModule', { value: true });
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function createInMemoryCache(options = { serializable: true }) {
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// eslint-disable-next-line functional/no-let
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let cache = {};
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return {
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get(key, defaultValue, events = {
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miss: () => Promise.resolve(),
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}) {
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const keyAsString = JSON.stringify(key);
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if (keyAsString in cache) {
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return Promise.resolve(options.serializable ? JSON.parse(cache[keyAsString]) : cache[keyAsString]);
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}
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const promise = defaultValue();
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const miss = (events && events.miss) || (() => Promise.resolve());
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return promise.then((value) => miss(value)).then(() => promise);
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},
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set(key, value) {
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// eslint-disable-next-line functional/immutable-data
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cache[JSON.stringify(key)] = options.serializable ? JSON.stringify(value) : value;
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return Promise.resolve(value);
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},
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delete(key) {
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// eslint-disable-next-line functional/immutable-data
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delete cache[JSON.stringify(key)];
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return Promise.resolve();
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},
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clear() {
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cache = {};
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return Promise.resolve();
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},
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};
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}
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exports.createInMemoryCache = createInMemoryCache;
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