forked from MapComplete/MapComplete
48 lines
1.5 KiB
TypeScript
48 lines
1.5 KiB
TypeScript
import { UIEventSource } from "../UIEventSource"
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import * as idb from "idb-keyval"
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import { Utils } from "../../Utils"
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/**
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* UIEventsource-wrapper around indexedDB key-value
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*/
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export class IdbLocalStorage {
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private static readonly _sourceCache: Record<string, UIEventSource<any>> = {}
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public static Get<T>(
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key: string,
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options?: { defaultValue?: T; whenLoaded?: (t: T | null) => void }
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): UIEventSource<T> {
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if (IdbLocalStorage._sourceCache[key] !== undefined) {
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return IdbLocalStorage._sourceCache[key]
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}
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const src = new UIEventSource<T>(options?.defaultValue, "idb-local-storage:" + key)
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if (Utils.runningFromConsole) {
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return src
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}
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src.addCallback((v) => idb.set(key, v))
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idb.get(key)
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.then((v) => {
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src.setData(v ?? options?.defaultValue)
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if (options?.whenLoaded !== undefined) {
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options?.whenLoaded(v)
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}
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})
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.catch((err) => {
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console.warn("Loading from local storage failed due to", err)
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if (options?.whenLoaded !== undefined) {
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options?.whenLoaded(null)
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}
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})
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IdbLocalStorage._sourceCache[key] = src
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return src
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}
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public static SetDirectly(key: string, value) {
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idb.set(key, value)
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}
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static GetDirectly(key: string) {
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return idb.get(key)
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}
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}
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