35 lines
1 KiB
TypeScript
35 lines
1 KiB
TypeScript
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/***
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* Saves all the features that are passed in to localstorage, so they can be retrieved on the next run
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*
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* Technically, more an Actor then a featuresource, but it fits more neatly this ay
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*/
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import FeatureSource from "./FeatureSource";
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import {UIEventSource} from "../UIEventSource";
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export default class LocalStorageSaver implements FeatureSource {
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public static readonly storageKey: string = "cached-features";
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public readonly features: UIEventSource<{ feature: any; freshness: Date }[]>;
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constructor(source: FeatureSource) {
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this.features = source.features;
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this.features.addCallbackAndRun(features => {
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if (features === undefined) {
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return;
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}
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if(features.length == 0){
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return;
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}
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try {
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localStorage.setItem(LocalStorageSaver.storageKey, JSON.stringify(features));
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} catch (e) {
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console.warn("Could not save the features to local storage:", e)
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}
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})
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}
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}
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