forked from MapComplete/MapComplete
82 lines
3 KiB
TypeScript
82 lines
3 KiB
TypeScript
import { FeatureSource } from "../FeatureSource"
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import { Feature } from "geojson"
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import TileLocalStorage from "./TileLocalStorage"
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import { GeoOperations } from "../../GeoOperations"
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import FeaturePropertiesStore from "./FeaturePropertiesStore"
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import { UIEventSource } from "../../UIEventSource"
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import { Utils } from "../../../Utils"
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class SingleTileSaver {
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private readonly _storage: UIEventSource<Feature[]>
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private readonly _registeredIds = new Set<string>()
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private readonly _featureProperties: FeaturePropertiesStore
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private readonly _isDirty = new UIEventSource(false)
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constructor(
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storage: UIEventSource<Feature[]> & { flush: () => void },
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featureProperties: FeaturePropertiesStore
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) {
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this._storage = storage
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this._featureProperties = featureProperties
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this._isDirty.stabilized(1000).addCallbackD((isDirty) => {
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if (!isDirty) {
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return
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}
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// 'isDirty' is set when tags of some object have changed
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storage.flush()
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this._isDirty.setData(false)
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})
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}
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public saveFeatures(features: Feature[]) {
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if (Utils.sameList(features, this._storage.data)) {
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return
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}
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for (const feature of features) {
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const id = feature.properties.id
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if (this._registeredIds.has(id)) {
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continue
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}
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this._featureProperties.getStore(id)?.addCallbackAndRunD(() => {
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this._isDirty.setData(true)
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})
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this._registeredIds.add(id)
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}
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this._storage.setData(features)
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}
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}
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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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* The data is saved in a tiled way on a fixed zoomlevel and is retrievable per layer.
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*
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* Also see the sibling class
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*/
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export default class SaveFeatureSourceToLocalStorage {
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constructor(
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backend: string,
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layername: string,
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zoomlevel: number,
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features: FeatureSource,
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featureProperties: FeaturePropertiesStore
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) {
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const storage = TileLocalStorage.construct<Feature[]>(backend, layername)
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const singleTileSavers: Map<number, SingleTileSaver> = new Map<number, SingleTileSaver>()
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features.features.addCallbackAndRunD((features) => {
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const sliced = GeoOperations.slice(zoomlevel, features)
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sliced.forEach((features, tileIndex) => {
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let tileSaver = singleTileSavers.get(tileIndex)
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if (tileSaver === undefined) {
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const src = storage.getTileSource(tileIndex)
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tileSaver = new SingleTileSaver(src, featureProperties)
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singleTileSavers.set(tileIndex, tileSaver)
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}
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// Don't cache not-uploaded features yet - they'll be cached when the receive their id
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features = features.filter((f) => !f.properties.id.match(/(node|way)\/-[0-9]+/))
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tileSaver.saveFeatures(features)
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})
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})
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}
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}
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