MapComplete/Logic/FeatureSource/TiledFeatureSource/LocalStorageFeatureSource.ts

import DynamicTileSource from "./DynamicTileSource"
import {Store} from "../../UIEventSource"
import {BBox} from "../../BBox"
import TileLocalStorage from "../Actors/TileLocalStorage"
import {Feature} from "geojson"
import StaticFeatureSource from "../Sources/StaticFeatureSource"

export default class LocalStorageFeatureSource extends DynamicTileSource {
    constructor(
        backend: string,
        layername: string,
        zoomlevel: number,
        mapProperties: {
            bounds: Store<BBox>
            zoom: Store<number>
        },
        options?: {
            isActive?: Store<boolean>,
            maxAge?: number // In seconds
        }
    ) {
        const storage = TileLocalStorage.construct<Feature[]>(backend, layername, options?.maxAge ?? 24 * 60 * 60)
        super(
            zoomlevel,
            (tileIndex) =>
                new StaticFeatureSource(
                    storage
                        .getTileSource(tileIndex)
                        .mapD((features) => {
                                if (features.length === undefined) {
                                    console.trace("These are not features:", features)
                                    storage.invalidate(zoomlevel, tileIndex)
                                    return []
                                }
                                return features.filter((f) => !f.properties.id.match(/(node|way)\/-[0-9]+/));
                            }
                        )
                ),
            mapProperties,
            options
        )
    }
}