39 lines
1.0 KiB
TypeScript
39 lines
1.0 KiB
TypeScript
import * as React from "bloatless-react";
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class PageTracker {
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pages: React.State<HTMLElement | undefined> | undefined;
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}
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class PageTrackerMap {
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trackers = new Map<string, PageTracker>();
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private register = (key: string): PageTracker => {
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if (this.trackers.has(key)) {
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return this.trackers.get(key);
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}
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const tracker = new PageTracker();
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this.trackers.set(key, tracker);
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return tracker;
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};
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setPages = (
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key: string,
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pages: () => React.State<HTMLElement>,
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): React.State<HTMLElement | undefined> | undefined => {
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const tracker: PageTracker = this.register(key);
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if (tracker.pages != undefined) {
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return tracker.pages;
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} else {
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tracker.pages = pages();
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return tracker.pages;
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}
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};
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}
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export class ViewPersistence {
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static readonly chatPages = new PageTracker();
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static readonly taskPages = new PageTrackerMap();
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static readonly boardPages = new PageTrackerMap();
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}
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