import {Basemap} from "./Basemap"; import {TagsFilter, TagUtils} from "./TagsFilter"; import {UIEventSource} from "../UI/UIEventSource"; import {ElementStorage} from "./ElementStorage"; import {Changes} from "./Changes"; import L from "leaflet" import {GeoOperations} from "./GeoOperations"; import {UIElement} from "../UI/UIElement"; /*** * A filtered layer is a layer which offers a 'set-data' function * It is initialized with a tagfilter. * * When geojson-data is given to 'setData', all the geojson matching the filter, is rendered on this layer. * If it is not rendered, it is returned in a 'leftOver'-geojson; which can be consumed by the next layer. * * This also makes sure that no objects are rendered twice if they are applicable on two layers */ export class FilteredLayer { public readonly name: string; public readonly filters: TagsFilter; private readonly _map: Basemap; private readonly _maxAllowedOverlap: number; private readonly _style: (properties) => { color: string, icon: any }; private readonly _storage: ElementStorage; /** The featurecollection from overpass */ private _dataFromOverpass; /** List of new elements, geojson features */ private _newElements = []; /** * The leaflet layer object which should be removed on rerendering */ private _geolayer; private _selectedElement: UIEventSource; private _showOnPopup: (tags: UIEventSource) => UIElement; constructor( name: string, map: Basemap, storage: ElementStorage, changes: Changes, filters: TagsFilter, maxAllowedOverlap: number, style: ((properties) => any), selectedElement: UIEventSource, showOnPopup: ((tags: UIEventSource) => UIElement) ) { this._selectedElement = selectedElement; this._showOnPopup = showOnPopup; if (style === undefined) { style = function () { return {}; } } this.name = name; this._map = map; this.filters = filters; this._style = style; this._storage = storage; this._maxAllowedOverlap = maxAllowedOverlap; } /** * The main function to load data into this layer. * The data that is NOT used by this layer, is returned as a geojson object; the other data is rendered */ public SetApplicableData(geojson: any): any { const leftoverFeatures = []; const selfFeatures = []; for (const feature of geojson.features) { // feature.properties contains all the properties var tags = TagUtils.proprtiesToKV(feature.properties); if (this.filters.matches(tags)) { selfFeatures.push(feature); } else { leftoverFeatures.push(feature); } } this.RenderLayer({ type: "FeatureCollection", features: selfFeatures }) const notShadowed = []; for (const feature of leftoverFeatures) { if (this._maxAllowedOverlap !== undefined && this._maxAllowedOverlap >= 0) { if (GeoOperations.featureIsContainedInAny(feature, selfFeatures, this._maxAllowedOverlap)) { // This feature is filtered away continue; } } notShadowed.push(feature); } return { type: "FeatureCollection", features: notShadowed }; } public updateStyle() { if (this._geolayer === undefined) { return; } const self = this; this._geolayer.setStyle(function (feature) { return self._style(feature.properties); }); } public AddNewElement(element) { this._newElements.push(element); console.log("Element added"); this.RenderLayer(this._dataFromOverpass); // Update the layer } private RenderLayer(data) { let self = this; if (this._geolayer !== undefined && this._geolayer !== null) { this._map.map.removeLayer(this._geolayer); } this._dataFromOverpass = data; const fusedFeatures = []; const idsFromOverpass = []; for (const feature of data.features) { idsFromOverpass.push(feature.properties.id); fusedFeatures.push(feature); } for (const feature of this._newElements) { if (idsFromOverpass.indexOf(feature.properties.id) < 0) { // This element is not yet uploaded or not yet visible in overpass // We include it in the layer fusedFeatures.push(feature); } } // We use a new, fused dataset data = { type: "FeatureCollection", features: fusedFeatures } // The data is split in two parts: the poinst and the rest // The points get a special treatment in order to render them properly // Note that some features might get a point representation as well this._geolayer = L.geoJSON(data, { style: function (feature) { return self._style(feature.properties); }, pointToLayer: function (feature, latLng) { const style = self._style(feature.properties); let marker; if (style.icon === undefined) { marker = L.circle(latLng, { radius: 25, color: style.color }); } else { marker = L.marker(latLng, { icon: style.icon }); } return marker; }, onEachFeature: function (feature, layer) { let eventSource = self._storage.addOrGetElement(feature); eventSource.addCallback(function () { self.updateStyle(); }); const uiElement = self._showOnPopup(eventSource); layer.bindPopup(uiElement.Render()); layer.on("click", function (e) { console.log("Selected ", feature) self._selectedElement.setData(feature.properties); uiElement.Update(); uiElement.Activate(); L.DomEvent.stop(e); // Marks the event as consumed }); } }); this._geolayer.addTo(this._map.map); } }