refactor: initialize config via APP_INITIALIZER

Closes #181

src/app/modules/map/map.module.ts

@@ -13,7 +13,6 @@
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
 import {CommonModule} from '@angular/common';
-import {APP_INITIALIZER, NgModule} from '@angular/core';
 import {FormsModule} from '@angular/forms';
 import {RouterModule, Routes} from '@angular/router';
 import {LeafletModule} from '@asymmetrik/ngx-leaflet';
@@ -34,6 +33,7 @@ import {MapPageComponent} from './page/map-page.component';
 import {MapListModalComponent} from './page/modals/map-list-modal.component';
 import {MapSingleModalComponent} from './page/modals/map-single-modal.component';
 import {MapItemComponent} from './item/map-item.component';
+import {NgModule} from '@angular/core';
 
 /**
  * Initializes the default area to show in advance (before components are initialized)
@@ -86,12 +86,6 @@ const mapRoutes: Routes = [
     DataProvider,
     DataFacetsProvider,
     StAppsWebHttpClient,
-    {
-      provide: APP_INITIALIZER,
-      multi: true,
-      deps: [ConfigProvider, MapProvider],
-      useFactory: initMapConfigFactory,
-    },
   ],
 })
 export class MapModule {}

src/app/modules/map/map.provider.ts

@@ -26,6 +26,7 @@ import {divIcon, geoJSON, icon, LatLng, Map, marker, Marker} from 'leaflet';
 import {DataProvider} from '../data/data.provider';
 import {MapPosition, PositionService} from './position.service';
 import {hasValidLocation} from '../data/types/place/place-types';
+import {ConfigProvider} from '../config/config.provider';
 
 /**
  * Provides methods for presenting the map
@@ -107,7 +108,12 @@ export class MapProvider {
   constructor(
     private dataProvider: DataProvider,
     private positionService: PositionService,
-  ) {}
+    private configProvider: ConfigProvider,
+  ) {
+    this.defaultPolygon = this.configProvider.getValue(
+      'campusPolygon',
+    ) as Polygon;
+  }
 
   /**
    * Provide the specific place by its UID
@@ -128,7 +134,7 @@ export class MapProvider {
 
   /**
    * Provide places (buildings and canteens)    const result = await this.dataProvider.search(query);
-   
+
    *
    * @param contextFilter Additional contextual filter (e.g. from the context menu)
    * @param queryText Query (text) of the search query