import FeatureSource from "./FeatureSource"; import {UIEventSource} from "../UIEventSource"; import LayerConfig from "../../Customizations/JSON/LayerConfig"; /** * In some rare cases, some elements are shown on multiple layers (when 'passthrough' is enabled) * If this is the case, multiple objects with a different _matching_layer_id are generated. * If not, the _feature_layter_id is added */ export default class FeatureDuplicatorPerLayer implements FeatureSource { public readonly features: UIEventSource<{ feature: any; freshness: Date }[]>; constructor(layers: { layerDef: LayerConfig }[], upstream: FeatureSource) { let noPassthroughts = true; for (const layer of layers) { if (layer.layerDef.passAllFeatures) { noPassthroughts = false; break; } } this.features = upstream.features.map(features => { const newFeatures: { feature: any, freshness: Date }[] = []; if(features === undefined){ return newFeatures; } for (const f of features) { if (f.feature._matching_layer_id) { // Already matched previously // We simply add it newFeatures.push(f); return; } for (const layer of layers) { if (layer.layerDef.overpassTags.matchesProperties(f.feature.properties)) { if (layer.layerDef.passAllFeatures) { // We copy the feature; the "properties" field is kept identical though! // Keeping "properties" identical is needed, as it might break the 'allElementStorage' otherwise const newFeature = { geometry: f.feature.geometry, id: f.feature.id, type: f.feature.type, properties: f.feature.properties, _matching_layer_id : layer.layerDef.id } newFeatures.push({feature: newFeature, freshness: f.freshness}); } else { // If not 'passAllFeatures', we are done f.feature._matching_layer_id = layer.layerDef.id; newFeatures.push(f); break; } } } } return newFeatures; }) } }