102 lines
No EOL
3.8 KiB
TypeScript
102 lines
No EOL
3.8 KiB
TypeScript
import FilteredLayer from "../../../Models/FilteredLayer";
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import {FeatureSourceForLayer, Tiled} from "../FeatureSource";
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import {UIEventSource} from "../../UIEventSource";
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import Loc from "../../../Models/Loc";
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import DynamicTileSource from "./DynamicTileSource";
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import {Utils} from "../../../Utils";
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import GeoJsonSource from "../Sources/GeoJsonSource";
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import {BBox} from "../../BBox";
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export default class DynamicGeoJsonTileSource extends DynamicTileSource {
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private static whitelistCache = new Map<string, any>()
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constructor(layer: FilteredLayer,
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registerLayer: (layer: FeatureSourceForLayer & Tiled) => void,
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state: {
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locationControl: UIEventSource<Loc>
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currentBounds: UIEventSource<BBox>
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}) {
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const source = layer.layerDef.source
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if (source.geojsonZoomLevel === undefined) {
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throw "Invalid layer: geojsonZoomLevel expected"
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}
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if (source.geojsonSource === undefined) {
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throw "Invalid layer: geojsonSource expected"
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}
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let whitelist = undefined
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if (source.geojsonSource.indexOf("{x}_{y}.geojson") > 0) {
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const whitelistUrl = source.geojsonSource
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.replace("{z}", "" + source.geojsonZoomLevel)
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.replace("{x}_{y}.geojson", "overview.json")
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.replace("{layer}", layer.layerDef.id)
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if (DynamicGeoJsonTileSource.whitelistCache.has(whitelistUrl)) {
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whitelist = DynamicGeoJsonTileSource.whitelistCache.get(whitelistUrl)
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} else {
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Utils.downloadJsonCached(whitelistUrl, 1000 * 60 * 60).then(
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json => {
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const data = new Map<number, Set<number>>();
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for (const x in json) {
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if (x === "zoom") {
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continue
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}
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data.set(Number(x), new Set(json[x]))
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}
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console.log("The whitelist is", data, "based on ", json, "from", whitelistUrl)
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whitelist = data
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DynamicGeoJsonTileSource.whitelistCache.set(whitelistUrl, whitelist)
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}
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).catch(err => {
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console.warn("No whitelist found for ", layer.layerDef.id, err)
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})
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}
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}
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const seenIds = new Set<string>();
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const blackList = new UIEventSource(seenIds)
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super(
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layer,
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source.geojsonZoomLevel,
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(zxy) => {
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if (whitelist !== undefined) {
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const isWhiteListed = whitelist.get(zxy[1])?.has(zxy[2])
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if (!isWhiteListed) {
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console.debug("Not downloading tile", ...zxy, "as it is not on the whitelist")
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return undefined;
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}
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}
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const src = new GeoJsonSource(
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layer,
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zxy,
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{
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featureIdBlacklist: blackList
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}
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)
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src.features.addCallbackAndRunD(feats => {
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feats.forEach(feat => seenIds.add(feat.feature.properties.id))
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blackList.ping();
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})
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registerLayer(src)
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return src
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},
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state
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);
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}
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public static RegisterWhitelist(url: string, json: any) {
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const data = new Map<number, Set<number>>();
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for (const x in json) {
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if (x === "zoom") {
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continue
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}
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data.set(Number(x), new Set(json[x]))
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}
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DynamicGeoJsonTileSource.whitelistCache.set(url, data)
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}
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} |