thematic-earth/gcslib/serializers/geojson-serializer.class.js

HTML-based, whole-Earth thematic maps using locally hosted data layers

/* Copyright (c) 2023 Read Write Tools. Legal use subject to the Thematic Earth Software License Agreement. */
import StringBuilder from'./builders/string-builder.class.js';import expect from'../softlib/expect.js';export default class GeojsonSerializer{constructor(e,t,i,r){expect(e,'GcsHoldingArea'),expect(t,'Number'),expect(i,'String'),expect(r,'Array'),this.gcsFeaturePoints=e.gcsFeaturePoints,this.gcsFeatureLines=e.gcsFeatureLines,this.gcsFeaturePolygons=e.gcsFeaturePolygons,this.indexedCoordinates=e.indexedCoordinates,this.accuracy=t,this.datasetId=i,this.propertiesToInclude=r,this.stringBuilder=new StringBuilder}serialize(){var e=null;return 1==this.isMultiFeatureCollection()?((e={type:'MultiFeatureCollection',id:this.datasetId,collections:[]}).collections.push(this.pointCollection('points')),e.collections.push(this.lineCollection('lines')),e.collections.push(this.polygonCollection('polygons'))):this.gcsFeaturePoints.length>0?e=this.pointCollection(this.datasetId):this.gcsFeatureLines.length?e=this.lineCollection(this.datasetId):this.gcsFeaturePolygons.length>0&&(e=this.polygonCollection(this.datasetId)),JSON.stringify(e,null,4)}pointCollection(e){return{type:'FeatureCollection',id:e,features:this.writePointFeatures()}}lineCollection(e){return{type:'FeatureCollection',id:e,features:this.writeLineFeatures()}}polygonCollection(e){return{type:'FeatureCollection',id:e,features:this.writePolygonFeatures()}}isMultiFeatureCollection(){var e=0;return this.gcsFeaturePoints.length>0&&e++,this.gcsFeatureLines.length>0&&e++,this.gcsFeaturePolygons.length>0&&e++,e>1}writePointFeatures(){var e=[];for(let r=0;r<this.gcsFeaturePoints.length;r++){var t=this.gcsFeaturePoints[r],i={properties:{},type:'Feature',geometry:{type:'Point',coordinates:[]}};this.writeProperties(i.properties,t),i.geometry.coordinates[0]=this.writeWithAccuracy(t.discretePoint.longitude),i.geometry.coordinates[1]=this.writeWithAccuracy(t.discretePoint.latitude),e.push(i)}return e}writeLineFeatures(e){e=[];for(let s=0;s<this.gcsFeatureLines.length;s++){var t=this.gcsFeatureLines[s],i={properties:{},type:'Feature',geometry:{type:'LineString',coordinates:[]}};this.writeProperties(i.properties,t);for(let e=0;e<t.lineSegment.length;e++){var r=[];r[0]=this.writeWithAccuracy(t.lineSegment[e].longitude),r[1]=this.writeWithAccuracy(t.lineSegment[e].latitude),i.geometry.coordinates.push(r)}e.push(i)}return e}writePolygonFeatures(e){e=[];for(let n=0;n<this.gcsFeaturePolygons.length;n++){var t=this.gcsFeaturePolygons[n],i={properties:{},type:'Feature',geometry:{type:'Polygon',coordinates:[]}};this.writeProperties(i.properties,t);var r=[];for(let e=0;e<t.outerRing.length;e++){(o=[])[0]=this.writeWithAccuracy(t.outerRing[e].longitude),o[1]=this.writeWithAccuracy(t.outerRing[e].latitude),r.push(o)}i.geometry.coordinates.push(r);for(let e=0;e<t.innerRings.length;e++){var s=[];for(let i=0;i<t.innerRings[e].length;i++){var o;(o=[])[0]=this.writeWithAccuracy(t.innerRings[e][i].longitude),o[1]=this.writeWithAccuracy(t.innerRings[e][i].latitude),s.push(o)}i.geometry.coordinates.push(s)}e.push(i)}return e}writeProperties(e,t){expect(e,'Object'),expect(t,['GcsPointFeature','GcsLineFeature','GcsPolygonFeature']);for(let r in t.kvPairs)if(this.isPropertyWanted(r)){var i=t.kvPairs[r];e[r]=this.writeWithAccuracy(i)}}isPropertyWanted(e){return!this.propertiesToInclude.includes('none')&&(!!this.propertiesToInclude.includes('all')||!!this.propertiesToInclude.includes(e))}writeWithAccuracy(e){return null==e?'null':'Number'!=e.constructor.name||Number.isInteger(e)?e:Number(e.toFixed(this.accuracy))}}