Add Turf to the project, to calculate the center of polygons

package.json

@@ -18,6 +18,7 @@
     "@angular/platform-browser": "^21.2.0",
     "@angular/router": "^21.2.0",
     "@bluehalo/ngx-leaflet": "^21.2.0",
+    "@turf/turf": "^7.3.5",
     "@types/geojson": "^7946.0.16",
     "@types/leaflet": "^1.9.21",
     "leaflet": "^1.9.4",

src/app/app.ts

@@ -1,11 +1,11 @@
 import { Component } from '@angular/core';
 import { RouterOutlet } from '@angular/router';
 import { Header } from './header/header';
-import { Map } from './map/map';
+import { OSMMap } from './map/map';
 
 @Component({
   selector: 'app-root',
-  imports: [RouterOutlet, Header, Map],
+  imports: [RouterOutlet, Header, OSMMap],
   templateUrl: './app.html',
   styleUrl: './app.scss',
 })

src/app/map/geojson.ts

@@ -4,8 +4,8 @@ import * as G from 'geojson';
 export const buildingSytle = {
   color: '#d62305', // Red border
   weight: 2, // Border width
-  fillColor: '#d62305', // Red fill
-  fillOpacity: 0.1, // Semi-transparent fill
+  fillColor: '#d4caca', // Red fill
+  fillOpacity: 1, // Semi-transparent fill
 };
 
 // Example GeoJSON data
@@ -28,9 +28,8 @@ export const buildings: G.FeatureCollection = {
     {
       type: 'Feature',
       properties: {
-        name: 'Gebäude E',
+        name: 'E',
         building: 'university',
-        center: [8.39007, 49.015],
       },
       geometry: {
         type: 'Polygon',
@@ -48,9 +47,8 @@ export const buildings: G.FeatureCollection = {
     {
       type: 'Feature',
       properties: {
-        name: 'Gebäude F',
+        name: 'F',
         building: 'university',
-        center: [8.3901208597194, 49.0156137375335],
       },
       geometry: {
         type: 'Polygon',

src/app/map/map.html

@@ -1,15 +1,8 @@
 <div class="map-wrapper">
   <div
     class="map-container"
-    [ngClass]="isFullscreen ? 'map-fullscreen' : 'map-details'"
     leaflet
     [leafletOptions]="options"
     (leafletMapReady)="onMapReady($event)"
   ></div>
-  @if (!isFullscreen && details) {
-  <div class="details">
-    <h2>{{ details.name }}</h2>
-    <p>{{ details.building }}</p>
-  </div>
-  }
 </div>

src/app/map/map.scss

@@ -4,6 +4,7 @@
   position: absolute;
   top: 54px;
   height: calc(100vh - 54px);
+  width: 100%;
 }
 
 .map-fullscreen {

src/app/map/map.ts

@@ -1,6 +1,7 @@
 import { Component, signal } from '@angular/core';
 import { CommonModule } from '@angular/common';
 import { LeafletModule } from '@bluehalo/ngx-leaflet';
+import { center } from '@turf/turf';
 import { Overpass } from '../overpass';
 import * as L from 'leaflet';
 
@@ -13,12 +14,11 @@ import * as E from './geojson';
   templateUrl: './map.html',
   styleUrl: './map.scss',
 })
-export class Map {
-  private centerLocation = { lat: 49.015514096207895, lng: 8.391567600294243 };
+export class OSMMap {
+  private buildingLayer?: L.LayerGroup;
 
   protected readonly title = signal('HKA-OSM');
   map?: L.Map;
-  details?: D.Details;
 
   isFullscreen = true;
 
@@ -33,7 +33,7 @@ export class Map {
   options: L.MapOptions = {
     layers: [this.osm],
     zoom: 18, // Zoom level
-    center: L.latLng(this.centerLocation.lat, this.centerLocation.lng),
+    center: this.getCenter(), // Center of the map
     maxBounds: L.latLngBounds(
       L.latLng(49.014442, 8.387954), // Southwest corner
       L.latLng(49.017847, 8.395448), // Northeast corner
@@ -51,7 +51,6 @@ export class Map {
     this.map = map;
     this.layerControl.addTo(this.map);
     this.loadBuildings().addTo(this.map);
-    this.queryBuildings();
     console.log('Map is ready');
   }
 
@@ -63,23 +62,14 @@ export class Map {
           click: (e) => {
             this.isFullscreen = !this.isFullscreen;
             if (!this.isFullscreen) {
-              this.map?.setView(
-                L.latLng(feature.properties.center[1], feature.properties.center[0]),
-                20,
-              );
-              //FIXME: Disable dragging and keyboard interactions when in fullscreen mode
-              this.map?.dragging.disable() &&
-                this.map?.keyboard.disable() &&
-                this.map?.scrollWheelZoom.disable();
-              this.details = new D.Details(feature.properties.name, feature.properties.building);
+              this.map?.setView(this.getCenter(feature.geometry), 20);
+              this.buildingLayer = this.queryBuildings(feature.properties.name);
+              this.buildingLayer.addTo(this.map!);
             } else {
-              this.map?.setView(L.latLng(this.centerLocation.lat, this.centerLocation.lng), 18);
-
-              //FIXME: Enable dragging and keyboard interactions when in fullscreen mode
-              this.map?.dragging.enable() &&
-                this.map?.keyboard.enable() &&
-                this.map?.scrollWheelZoom.enable();
-              this.details = undefined;
+              this.map?.setView(this.getCenter(), 18);
+              if (this.buildingLayer) {
+                this.map?.removeLayer(this.buildingLayer);
+              }
             }
             console.log('Set isFullscreen to:', this.isFullscreen);
             console.log('Clicked on feature:', feature.properties?.name);
@@ -95,10 +85,49 @@ export class Map {
     });
   }
 
-  queryBuildings() {
-    this.overpass.fetchBuildings('E').subscribe((data) => {
+  queryBuildings(building_name: string) {
+    // Get the building name from the feature properties and query the Overpass API for detailed building data,
+    // including indoor features.
+
+    // Create a new LayerGroup to hold the building polygons
+    const resultingLayer = new L.LayerGroup();
+    this.overpass.fetchBuildings(building_name).subscribe((data) => {
       console.log('Fetched building data from Overpass API:', data);
-      // Here you would typically process the data and add it to the map
+
+      // Create a mapping of node IDs to their coordinates
+      const nodes: Map<number, L.LatLng> = new Map();
+      data.elements.forEach((element: any) => {
+        if (element.type === 'node') {
+          nodes.set(element.id, new L.LatLng(element.lat, element.lon));
+        }
+      });
+
+      // Process ways and create polygons
+      // TODO: Change to features, to also add the meta data of the building, e.g. the name of the room
+      data.elements.forEach((element: any) => {
+        if (element.type === 'way') {
+          const coordinates: L.LatLng[] = [];
+          element.nodes.forEach((nodeId: number) => {
+            coordinates.push(nodes.get(nodeId)!);
+          });
+          L.polygon(coordinates, { color: '#999999', fillColor: '#e0e0e0', fillOpacity: 1 }).addTo(
+            resultingLayer,
+          );
+        }
+      });
     });
+    return resultingLayer;
+  }
+
+  private getCenter(feature?: any): L.LatLng {
+    // Calculate the center of the feature using Turf.js, or use a default center if no feature is provided.
+    let centerPoint: number[] = [];
+    if (feature) {
+      centerPoint = center(feature).geometry.coordinates.reverse();
+    } else {
+      centerPoint = [49.015514096207895, 8.391567600294243];
+    }
+    const result = new L.LatLng(centerPoint[0], centerPoint[1]);
+    return result;
   }
 }

src/app/overpass.ts

@@ -1,6 +1,25 @@
 import { Injectable } from '@angular/core';
 import { HttpClient } from '@angular/common/http';
 
+export interface OverpassElementNode {
+  type: 'node';
+  id: number;
+  lat: number;
+  lon: number;
+}
+
+export interface OverpassElementWay {
+  type: 'way';
+  id: number;
+  geometry?: Array<{ lat: number; lon: number }>;
+}
+
+export type OverpassElement = OverpassElementNode | OverpassElementWay;
+
+export interface OverpassResponse {
+  elements: OverpassElement[];
+}
+
 @Injectable({
   providedIn: 'root',
 })
@@ -13,7 +32,7 @@ export class Overpass {
     const header = { 'Content-Type': 'text/plain' };
     const query = `
       [out:json][timeout:25];
-      nwr["name"="${building_name}"](49.014442, 8.387954, 49.017847, 8.395448)->.building;
+      nwr["building"]["operator"="Hochschule Karlsruhe"]["name"="${building_name}"](49.014442, 8.387954, 49.017847, 8.395448)->.building;
       (
         nwr["indoor"="room"](area.building);
       );
@@ -21,6 +40,6 @@ export class Overpass {
       out body;
     `;
 
-    return this.http.post(this.apiUrl, query, { headers: header });
+    return this.http.post<OverpassResponse>(this.apiUrl, query, { headers: header });
   }
 }