Create buildingfactory.js

src/buildingfactory.js

@@ -0,0 +1,37 @@
+import {BuildingShapeUtils} from './extras/BuildingShapeUtils.js';
+import {Building} from './building.js';
+import {MultiBuildingPart} from './multibuildingpart.js';
+/**
+ * A class representing an OSM building
+ *
+ * The static factory is responsible for pulling all required
+ * XML data from the API.
+ */
+class BuildingFactory {
+
+  /**
+   * Create new building
+   */
+  static async createWay(id) {
+    var data = await Building.getRelationData(id);
+    let xmlData = new window.DOMParser().parseFromString(data, 'text/xml');
+    const nodelist = Building.buildNodeList(xmlData);
+    const extents = Building.getExtents(id, xmlData, nodelist);
+    const innerData = await Building.getInnerData(...extents);
+    return new MultiBuilding(id, innerData);
+  }
+
+  static async createRelation(id) {
+    var data = await Building.getRelationData(id);
+    let xmlData = new window.DOMParser().parseFromString(data, 'text/xml');
+    const nodelist = Building.buildNodeList(xmlData);
+    const extents = Building.getExtents(id, xmlData, nodelist);
+    const innerData = await Building.getInnerData(...extents);
+    const fullXmlData = new window.DOMParser().parseFromString(innerData, 'text/xml');
+    const outerElementXml = this.fullXmlData.getElementById(id);
+    if (outerElementXml.querySelector('[k="type"]').getAttribute('v') === 'multipolygon') {
+      return new MultiBuilding(id, innerData);
+    } 
+    return new RelationBuilding(id, innerData);
+  }
+}