37 lines
1.5 KiB
TypeScript
37 lines
1.5 KiB
TypeScript
import FeatureSource from "./FeatureSource";
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import {UIEventSource} from "../UIEventSource";
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import LocalStorageSaver from "./LocalStorageSaver";
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import LayoutConfig from "../../Customizations/JSON/LayoutConfig";
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export default class LocalStorageSource implements FeatureSource {
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public features: UIEventSource<{ feature: any; freshness: Date }[]>;
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public readonly name = "LocalStorageSource";
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constructor(layout: UIEventSource<LayoutConfig>) {
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this.features = new UIEventSource<{ feature: any; freshness: Date }[]>([])
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const key = LocalStorageSaver.storageKey + layout.data.id
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layout.addCallbackAndRun(_ => {
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try {
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const fromStorage = localStorage.getItem(key);
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if (fromStorage == null) {
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return;
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}
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const loaded : { feature: any; freshness: Date | string }[]=
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JSON.parse(fromStorage);
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const parsed : { feature: any; freshness: Date }[]= loaded.map(ff => ({
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feature: ff.feature,
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freshness : typeof ff.freshness == "string" ? new Date(ff.freshness) : ff.freshness
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}))
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this.features.setData(parsed);
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console.log("Loaded ", loaded.length, " features from localstorage as cache")
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} catch (e) {
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console.log("Could not load features from localStorage:", e)
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localStorage.removeItem(key)
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}
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})
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}
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} |