import FeatureSource from "./FeatureSource"; import {UIEventSource} from "../UIEventSource"; import LayerConfig from "../../Customizations/JSON/LayerConfig"; import {GeoOperations} from "../GeoOperations"; /** * This is the part of the pipeline which introduces extra points at the center of an area (but only if this is demanded by the wayhandling) */ export default class WayHandlingApplyingFeatureSource implements FeatureSource { public readonly features: UIEventSource<{ feature: any; freshness: Date }[]>; public readonly name; constructor(layers: UIEventSource<{ layerDef: LayerConfig }[]>, upstream: FeatureSource) { this.name = "Wayhandling of " + upstream.name; this.features = upstream.features.map( features => { if (features === undefined) { return; } const layerDict = {}; let allDefaultWayHandling = true; for (const layer of layers.data) { layerDict[layer.layerDef.id] = layer; if (layer.layerDef.wayHandling !== LayerConfig.WAYHANDLING_DEFAULT) { allDefaultWayHandling = false; } } const newFeatures: { feature: any, freshness: Date }[] = []; for (const f of features) { const feat = f.feature; const layerId = feat._matching_layer_id; const layer: LayerConfig = layerDict[layerId].layerDef; if (layer === undefined) { throw "No layer found with id " + layerId; } if (layer.wayHandling === LayerConfig.WAYHANDLING_DEFAULT) { newFeatures.push(f); continue; } if (feat.geometry.type === "Point") { newFeatures.push(f); // it is a point, nothing to do here continue; } // Create the copy const centerPoint = GeoOperations.centerpoint(feat); centerPoint["_matching_layer_id"] = feat._matching_layer_id; newFeatures.push({feature: centerPoint, freshness: f.freshness}); if (layer.wayHandling === LayerConfig.WAYHANDLING_CENTER_AND_WAY) { newFeatures.push(f); } } return newFeatures; } ); } }