import {TagsFilter, TagUtils} from "./Tags"; import {UIEventSource} from "./UIEventSource"; import L from "leaflet" import {GeoOperations} from "./GeoOperations"; import {UIElement} from "../UI/UIElement"; import {LayerDefinition} from "../Customizations/LayerDefinition"; import codegrid from "codegrid-js"; import {State} from "../State"; /*** * 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 | UIElement; public readonly filters: TagsFilter; public readonly isDisplayed: UIEventSource = new UIEventSource(true); private readonly combinedIsDisplayed : UIEventSource; public readonly layerDef: LayerDefinition; private readonly _maxAllowedOverlap: number; private readonly _style: (properties) => { color: string, weight?: number, icon: { iconUrl: string, iconSize? : number[], popupAnchor?: number[], iconAnchor?:number[] } }; /** The featurecollection from overpass */ private _dataFromOverpass: any[]; private readonly _wayHandling: number; /** List of new elements, geojson features */ private _newElements = []; /** * The leaflet layer object which should be removed on rerendering */ private _geolayer; private _showOnPopup: (tags: UIEventSource, feature: any) => UIElement; private static readonly grid = codegrid.CodeGrid(); constructor( layerDef: LayerDefinition, showOnPopup: ((tags: UIEventSource, feature: any) => UIElement) ) { this.layerDef = layerDef; this._wayHandling = layerDef.wayHandling; this._showOnPopup = showOnPopup; this._style = layerDef.style; if (this._style === undefined) { this._style = function () { return {icon: {iconUrl: "./assets/bug.svg"}, color: "#000"}; } } this.name = name; this.filters = layerDef.overpassFilter; this._maxAllowedOverlap = layerDef.maxAllowedOverlapPercentage; const self = this; this.combinedIsDisplayed = this.isDisplayed.map(isDisplayed => { return isDisplayed && State.state.locationControl.data.zoom >= self.layerDef.minzoom }, [State.state.locationControl] ); this.combinedIsDisplayed.addCallback(function (isDisplayed) { const map = State.state.bm.map; if (self._geolayer !== undefined && self._geolayer !== null) { if (isDisplayed) { self._geolayer.addTo(map); } else { map.removeLayer(self._geolayer); } } }) } static fromDefinition( definition, showOnPopup: (tags: UIEventSource, feature: any) => UIElement): FilteredLayer { return new FilteredLayer( definition, showOnPopup); } /** * 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 (let feature of geojson.features) { // feature.properties contains all the properties const tags = TagUtils.proprtiesToKV(feature.properties); if (this.filters.matches(tags)) { const centerPoint = GeoOperations.centerpoint(feature); feature.properties["_surface"] = ""+GeoOperations.surfaceAreaInSqMeters(feature); const lat = ""+centerPoint.geometry.coordinates[1]; const lon = ""+centerPoint.geometry.coordinates[0] feature.properties["_lon"] = lat; feature.properties["_lat"] = lon; FilteredLayer.grid.getCode(lat, lon, (error, code) => { if (error === null) { feature.properties["_country"] = code; } }) if (feature.geometry.type !== "Point") { if (this._wayHandling === LayerDefinition.WAYHANDLING_CENTER_AND_WAY) { selfFeatures.push(centerPoint); } else if (this._wayHandling === LayerDefinition.WAYHANDLING_CENTER_ONLY) { feature = centerPoint; } } 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 AddNewElement(element) { this._newElements.push(element); console.log("Element added"); this.RenderLayer({features:this._dataFromOverpass}); // Update the layer } private RenderLayer(data) { let self = this; if (this._geolayer !== undefined && this._geolayer !== null) { // Remove the old geojson layer from the map - we'll reshow all the elements later on anyway State.state.bm.map.removeLayer(this._geolayer); } const oldData = this._dataFromOverpass ?? []; // We keep track of all the ids that are freshly loaded in order to avoid adding duplicates const idsFromOverpass: Set = new Set(); // A list of all the features to show const fusedFeatures = []; // First, we add all the fresh data: for (const feature of data.features) { idsFromOverpass.add(feature.properties.id); fusedFeatures.push(feature); } // Now we add all the stale data for (const feature of oldData) { if (idsFromOverpass.has(feature.properties.id)) { continue; // Feature already loaded and a fresher version is available } idsFromOverpass.add(feature.properties.id); fusedFeatures.push(feature); } this._dataFromOverpass = fusedFeatures; for (const feature of this._newElements) { if (!idsFromOverpass.has(feature.properties.id)) { // 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 if (style.icon.iconUrl.startsWith("$circle ")) { marker = L.circle(latLng, { radius: 25, color: style.color }); } else { if (style.icon.iconSize === undefined) { style.icon.iconSize = [50, 50] } marker = L.marker(latLng, { icon: new L.icon(style.icon), }); } let eventSource = State.state.allElements.addOrGetElement(feature); const popup = L.popup({}, marker); let uiElement: UIElement; let content = undefined; marker.bindPopup(popup) .on("popupopen", () => { if (content === undefined) { uiElement = self._showOnPopup(eventSource, feature); // Lazily create the content content = uiElement.Render(); } popup.setContent(content); uiElement.Activate(); uiElement.Update(); }); return marker; }, onEachFeature: function (feature, layer) { // We monky-patch the feature element with an update-style feature.updateStyle = () => { if (layer.setIcon) { const icon = self._style(feature.properties).icon; if (icon.iconUrl) { layer.setIcon(L.icon(icon)) } } else { self._geolayer.setStyle(function (featureX) { return self._style(featureX.properties); }); } } let eventSource = State.state.allElements.addOrGetElement(feature); eventSource.addCallback(feature.updateStyle); layer.on("click", function (e) { State.state.selectedElement.data?.feature.updateStyle(); State.state.selectedElement.setData({feature: feature}); feature.updateStyle() if (feature.geometry.type === "Point") { return; // Points bind there own popups } const uiElement = self._showOnPopup(eventSource, feature); L.popup({ autoPan: true, }).setContent(uiElement.Render()) .setLatLng(e.latlng) .openOn(State.state.bm.map); uiElement.Update(); uiElement.Activate(); L.DomEvent.stop(e); // Marks the event as consumed }); } }); if (this.combinedIsDisplayed.data) { this._geolayer.addTo(State.state.bm.map); } } }