thematic-earth/joe/catalog/topojson-spatial-file.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 ExternalSpatialFile from'../catalog/external-spatial-file.class.js';import PointFeature from'../features/point-feature.class.js';import LineFeature from'../features/line-feature.class.js';import PolygonFeature from'../features/polygon-feature.class.js';import ProjectedPoint from'../projection/projected-point.class.js';import expect from'../dev/expect.js';import terminal from'../dev/terminal.js';export default class TopojsonSpatialFile extends ExternalSpatialFile{constructor(t){super(t),this.embeddedName='',this.topojsonObjects=null,this.topojsonArcs=null,this.scaleX=null,this.scaleY=null,this.translateX=null,this.translateY=null,this.topojsonObjects=null,this.topojsonTransform=null,this.topojsonArcs=null,Object.seal(this)}async retrieveData(t,e,r){expect(t,'String'),expect(e,'String'),expect(r,'Object'),this.replaceAppend=t,this.url=e,this.featureKey=r.featureKey||'',this.embeddedName=r.embeddedName||'';try{var a=await fetch(e,{cache:'no-cache',referrerPolicy:'no-referrer'});if(200!=a.status&&304!=a.status)throw new Error(`Request for ${e} returned with ${a.status}`);var i=await a.json();this.handleSpatialFileData(i),this.thematicEarthElement.signal.broadcast('catalog/spatialFileAdded',{spatialFileType:'topojson',url:e,options:r})}catch(t){terminal.caught(t)}}handleSpatialFileData(t){if(expect(t,'Object'),'replace'==this.replaceAppend&&(this.featureLookupMap=new Map,this.featurePolygons=[],this.featureLines=[],this.featurePoints=[]),'objects'in t==0)return terminal.abnormal(`No objects in topoJSON "${this.url}"`);if(this.topojsonObjects=t.objects,'arcs'in t==0)return terminal.abnormal(`No arcs in topoJSON "${this.url}"`);if(this.topojsonArcs=t.arcs,'transform'in t==0)return terminal.abnormal(`No transform in topoJSON "${this.url}"`);if(this.scaleX=parseFloat(t.transform.scale[0]),this.scaleY=parseFloat(t.transform.scale[1]),isNaN(this.scaleX)&&(this.scaleX=1),isNaN(this.scaleY)&&(this.scaleY=1),this.translateX=parseFloat(t.transform.translate[0]),this.translateY=parseFloat(t.transform.translate[1]),this.embeddedName in t.objects==0)return terminal.abnormal(`No embeddedName by the name of ${this.embeddedName} in "${this.url}"`);var e=this.topojsonObjects[this.embeddedName];if('GeometryCollection'!=e.type)return terminal.abnormal(`Expected GeometryCollection, but found ${e.type} in "${this.url}"`);for(var r=0;r<e.geometries.length;r++){var a=e.geometries[r],i=this.importKeyValuePairs(a),s='';if(null!=i&&''!=this.featureKey&&(i.hasOwnProperty(this.featureKey)?s=i[this.featureKey]:(s='',validationMessage(`No featureKey by the name of ${this.featureKey} while parsing ${this.url}, TESS rules that use ${this.featureKey} will not work`))),'type'in a!=0&&null!=a.type)if('MultiPolygon'==a.type)this.importMultiPolygon(a,i,s);else if('Polygon'==a.type)this.importPolygon(a,i,s);else if('MultiLineString'==a.type)this.importMultiLine(a,i,s);else if('LineString'==a.type)this.importLine(a,i,s);else if('MultiPoint'==a.type)this.importMultiPoint(a,i,s);else{if('Point'!=a.type){terminal.abnormal(`Info: [${r}] Skipping unknown geometry type ${a.type} in "${this.url}"`);continue}this.importPoint(a,i,s)}}this.topojsonObjects=null,this.topojsonTransform=null,this.topojsonArcs=null,this.localPointsNeedGeoCoords=!0,this.localPointsNeedProjection=!0,this.localPointsNeedTransformation=!0,this.localPointsNeedPlacement=!0}importKeyValuePairs(t){if('properties'in t==0)return{};var e={};for(var r in t.properties){var a=t.properties[r];e[r]=a}return e}importMultiPolygon(t,e,r){if('MultiPolygon'!=t.type)return terminal.abnormal(`Expected MultiPolygon, but found ${t.type}`);for(var a=0;a<t.arcs.length;a++){var i=new PolygonFeature;i.kvPairs=e,i.featureName=r;for(var s=0;s<t.arcs[a].length;s++)if(0==s)this.featurePolygons.push(i),this.addFeatureToLookupMap(i),this.importArcLists(i.outerRing,t.arcs[a][s]);else{var o=new PolygonFeature;i.innerRings.push(o),this.addFeatureToLookupMap(o),this.importArcLists(o.outerRing,t.arcs[a][s])}}}importPolygon(t,e,r){if('Polygon'!=t.type)return terminal.abnormal(`Expected Polygon, but found ${t.type}`);for(var a=0;a<t.arcs.length;a++){var i=new PolygonFeature;if(i.kvPairs=e,i.featureName=r,0==a)this.featurePolygons.push(i),this.addFeatureToLookupMap(i),this.importArcLists(i.outerRing,t.arcs[a]);else{var s=new PolygonFeature;i.innerRings.push(s),this.addFeatureToLookupMap(s),this.importArcLists(s.outerRing,t.arcs[a])}}}importMultiLine(t,e,r){if('MultiLineString'!=t.type)return terminal.abnormal(`Expected MultiLineString, but found ${t.type}`);for(var a=0;a<t.arcs.length;a++){var i=new LineFeature;i.kvPairs=e,i.featureName=r;for(var s=0;s<t.arcs[a].length;s++){var o=t.arcs[a][s],n=!1;o<0&&(n=!0,o=Math.abs(o)-1);var l=this.topojsonArcs[o];this.addArcToFeature(i.lineSegment,l,n)}this.featureLines.push(i),this.addFeatureToLookupMap(i)}}importLine(t,e,r){if('LineString'!=t.type)return terminal.abnormal(`Expected LineString, but found ${t.type}`);for(var a=0;a<t.arcs.length;a++){var i=new LineFeature;i.kvPairs=e,i.featureName=r;var s=t.arcs[a],o=!1;s<0&&(o=!0,s=Math.abs(s)-1);var n=this.topojsonArcs[s];this.addArcToFeature(i.lineSegment,n,o),this.featureLines.push(i),this.addFeatureToLookupMap(i)}}importMultiPoint(t,e,r){if('MultiPoint'!=t.type)return terminal.abnormal(`Expected MultiPoint, but found ${t.type}`);for(var a=0;a<t.coordinates.length;a++){var i=t.coordinates[a][0],s=t.coordinates[a][1],o=i*this.scaleX+this.translateX,n=s*this.scaleY+this.translateY,l=new ProjectedPoint(n,o),u=new PointFeature;u.kvPairs=e,u.featureName=r,u.discretePoint=l,this.featurePoints.push(u),this.addFeatureToLookupMap(u)}}importPoint(t,e,r){if('Point'!=t.type)return terminal.abnormal(`Expected Point, but found ${t.type}`);var a=t.coordinates[0],i=t.coordinates[1],s=a*this.scaleX+this.translateX,o=i*this.scaleY+this.translateY,n=new ProjectedPoint(o,s),l=new PointFeature;l.kvPairs=e,l.featureName=r,l.discretePoint=n,this.featurePoints.push(l),this.addFeatureToLookupMap(l)}importArcLists(t,e){for(var r=0;r<e.length;r++){var a=e[r],i=!1;a<0&&(i=!0,a=Math.abs(a)-1);var s=this.topojsonArcs[a];this.addArcToFeature(t,s,i)}}addArcToFeature(t,e,r){for(var a=0,i=0,s=e.length,o=[],n=0;n<s;n++){a+=e[h=n][0],i+=e[h][1];var l=a*this.scaleX+this.translateX,u=i*this.scaleY+this.translateY,p=new ProjectedPoint(u,l);o.push(p)}for(n=0;n<s;n++){var h=1==r?s-n-1:n;t.push(o[h])}}}var numMsgs=new Map;function validationMessage(t){var e=numMsgs.get(t)??0;e<10?terminal.warning(t):10==e&&terminal.error('Additional validation messages suppressed.'),e++,numMsgs.set(t,e)}