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