55 lines
1.2 KiB
JavaScript
55 lines
1.2 KiB
JavaScript
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//@ts-check
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const ID = "JadefinIntegrity";
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class JadefinIntegrity {
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/** @type {Map<string, {url: string, loaded: any}>} */
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loaded = new Map();
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constructor() {
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this.getOrAdd(ID, import.meta.url, () => this);
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}
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/**
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* @template T
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* @param {string} id
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* @param {string} [url]
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* @param {() => T} [cb]
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* @returns {T}
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*/
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getOrAdd(id, url, cb) {
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let entry = this.loaded.get(id);
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if (entry) {
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if (url && url != entry.url) {
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window["Jadefin"].log.w(`INTEGRITY CONFLICT for "${id}", loaded vs requested: \n ${entry.url} \n ${url}`);
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}
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} else if (!url || !cb) {
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throw new Error(`"${id}" not loaded`);
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} else {
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entry = {
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url,
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loaded: cb()
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};
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this.loaded.set(id, entry);
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}
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return entry.loaded;
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}
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}
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if (window[ID])
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{
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window[ID].getOrAdd(ID, import.meta.url, () => null);
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}
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/** @type {JadefinIntegrity} */
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const integrity = window[ID] ??= new JadefinIntegrity();
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/** @type {typeof JadefinIntegrity.prototype.getOrAdd} */
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export default integrity.getOrAdd.bind(integrity);
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