Lucien Cartier-Tilet
d54aabd621
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This commit removes dependency on rxjs. It also implements better composables to handle data fetching from remote APIs and caching these values more transparently. This commit also switches from yarn to npm It also switches to the official Umami plugin
73 lines
1.7 KiB
TypeScript
73 lines
1.7 KiB
TypeScript
import { ref, Ref } from 'vue';
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import { useCache } from './cache';
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type FetchAndCacheEmitter = (
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event: 'loaded' | 'error' | 'loading',
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...args: any[]
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) => void;
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interface UseFetchAndCacheOptions {
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cacheLifetime?: number;
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cacheName?: string;
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emits?: FetchAndCacheEmitter;
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}
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const dummyEmits = (
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_event: 'loaded' | 'error' | 'loading',
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..._args: any[]
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) => {};
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export const useFetchAndCache = <T, E>(
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url: string,
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options?: UseFetchAndCacheOptions,
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) => {
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const data = ref<T | null>(null) as Ref<T>;
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const error = ref<E | null>(null) as Ref<E>;
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const loading = ref<boolean>(true);
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const cacheLifetime: number = options?.cacheLifetime || 1000 * 60 * 60; // one hour
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const cacheName: string = options?.cacheName || url;
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const { isDataOutdated: isCacheOutdated, error: cacheError } = useCache(
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cacheName,
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data,
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{
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lifetime: cacheLifetime,
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},
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);
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const emits: FetchAndCacheEmitter = options?.emits || dummyEmits;
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const loaded = () => {
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loading.value = false;
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emits('loaded', data.value);
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};
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const fetchData = () => {
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loading.value = true;
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emits('loading');
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console.log('Fetching from URL', url);
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fetch(url)
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.then((response) => {
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if (!response.ok) {
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throw new Error(response.statusText);
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}
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return response.json() as Promise<T>;
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})
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.then((responseData) => {
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data.value = responseData;
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loaded();
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})
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.catch((e) => {
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console.warn('Caught error!', e);
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error.value = e;
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emits('error', e);
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})
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.finally(() => (loading.value = false));
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};
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if (isCacheOutdated.value || cacheError.value != null) {
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fetchData();
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} else {
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loaded();
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}
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return { data, loading, error };
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};
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