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56 lines
1.7 KiB
56 lines
1.7 KiB
import { MINUTE, SECOND } from '../constants/time';
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import getFetchWithTimeout from '../modules/fetch-with-timeout';
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import { getStorageItem, setStorageItem } from './storage-helpers';
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const fetchWithCache = async (
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url,
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fetchOptions = {},
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{ cacheRefreshTime = MINUTE * 6, timeout = SECOND * 30 } = {},
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) => {
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if (
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fetchOptions.body ||
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(fetchOptions.method && fetchOptions.method !== 'GET')
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) {
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throw new Error('fetchWithCache only supports GET requests');
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}
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if (!(fetchOptions.headers instanceof window.Headers)) {
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fetchOptions.headers = new window.Headers(fetchOptions.headers);
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}
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if (
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fetchOptions.headers.has('Content-Type') &&
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fetchOptions.headers.get('Content-Type') !== 'application/json'
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) {
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throw new Error('fetchWithCache only supports JSON responses');
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}
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const currentTime = Date.now();
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const cacheKey = `cachedFetch:${url}`;
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const { cachedResponse, cachedTime } = (await getStorageItem(cacheKey)) || {};
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if (cachedResponse && currentTime - cachedTime < cacheRefreshTime) {
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return cachedResponse;
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}
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fetchOptions.headers.set('Content-Type', 'application/json');
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const fetchWithTimeout = getFetchWithTimeout(timeout);
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const response = await fetchWithTimeout(url, {
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referrerPolicy: 'no-referrer-when-downgrade',
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body: null,
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method: 'GET',
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mode: 'cors',
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...fetchOptions,
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});
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if (!response.ok) {
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throw new Error(
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`Fetch failed with status '${response.status}': '${response.statusText}'`,
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);
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}
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const responseJson = await response.json();
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const cacheEntry = {
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cachedResponse: responseJson,
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cachedTime: currentTime,
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};
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await setStorageItem(cacheKey, cacheEntry);
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return responseJson;
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};
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export default fetchWithCache;
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