forked from MapComplete/MapComplete
35 lines
1.2 KiB
TypeScript
35 lines
1.2 KiB
TypeScript
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import {FeatureSourceForLayer} from "./FeatureSource";
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import {Utils} from "../../Utils";
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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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export default class LocalStorageSaverActor {
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public static readonly storageKey: string = "cached-features";
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constructor(source: FeatureSourceForLayer, x: number, y: number, z: number) {
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source.features.addCallbackAndRunD(features => {
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const index = Utils.tile_index(z, x, y)
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const key = `${LocalStorageSaverActor.storageKey}-${source.layer.layerDef.id}-${index}`
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const now = new Date().getTime()
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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(key, JSON.stringify(features));
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console.log("Saved ", features.length, "elements to", key)
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localStorage.setItem(key + "-time", JSON.stringify(now))
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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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