mapcomplete/Logic/FeatureSource/WayHandlingApplyingFeatureSource.ts

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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;
}
);
}
}