refactor: initialize config via APP_INITIALIZER

Closes #181

src/app/modules/about/about-page/about-page.component.ts

@@ -23,7 +23,7 @@ import {ConfigProvider} from '../../config/config.provider';
   styleUrls: ['about-page.scss'],
 })
 export class AboutPageComponent implements OnInit {
-  content: Promise<SCAboutPage>;
+  content: SCAboutPage;
 
   constructor(
     private readonly route: ActivatedRoute,
@@ -33,12 +33,11 @@ export class AboutPageComponent implements OnInit {
   async ngOnInit() {
     const route = this.route.snapshot.url.map(it => it.path).join('/');
 
-    this.content = new Promise(resolve => {
-      this.configProvider
-        .getValue('aboutPages')
-        .then(value =>
-          resolve((value as SCAppConfiguration['aboutPages'])[route] ?? {}),
-        );
-    });
+    this.content =
+      (
+        this.configProvider.getValue(
+          'aboutPages',
+        ) as SCAppConfiguration['aboutPages']
+      )[route] ?? {};
   }
 }

src/app/modules/about/about-page/about-page.html

@@ -19,7 +19,7 @@
       <ion-menu-button></ion-menu-button>
       <ion-back-button></ion-back-button>
     </ion-buttons>
-    <ion-title *ngIf="content | async as content; else titleLoading">{{
+    <ion-title *ngIf="content; else titleLoading">{{
       'title' | translateSimple: content
     }}</ion-title>
     <ng-template #titleLoading>
@@ -29,7 +29,7 @@
     </ng-template>
   </ion-toolbar>
 </ion-header>
-<ion-content *ngIf="content | async as content">
+<ion-content *ngIf="content">
   <about-page-content
     *ngFor="let element of content.content"
     [content]="element"

src/app/modules/config/config.provider.spec.ts

@@ -107,7 +107,6 @@ describe('ConfigProvider', () => {
     expect(storageProviderSpy.has).toHaveBeenCalled();
     expect(storageProviderSpy.get).toHaveBeenCalledTimes(0);
     expect(configProvider.client.handshake).toHaveBeenCalled();
-    expect(configProvider.initialised).toBe(true);
     expect(await configProvider.getValue('name')).toEqual(
       sampleIndexResponse.app.name,
     );
@@ -129,7 +128,6 @@ describe('ConfigProvider', () => {
     expect(error).toEqual(new ConfigFetchError());
     expect(storageProviderSpy.has).toHaveBeenCalled();
     expect(storageProviderSpy.get).toHaveBeenCalled();
-    expect(configProvider.initialised).toBe(true);
     expect(await configProvider.getValue('name')).toEqual(
       sampleIndexResponse.app.name,
     );

src/app/modules/config/config.provider.ts

@@ -50,21 +50,16 @@ export class ConfigProvider {
    */
   config: SCIndexResponse;
 
-  /**
-   * First session indicator
-   */
-  firstSession = true;
-
-  /**
-   * Initialised status flag of config provider
-   */
-  initialised = false;
-
   /**
    * Version of the @openstapps/core package that app is using
    */
   scVersion = packageJson.dependencies['@openstapps/core'];
 
+  /**
+   * First session indicator (config not found in storage)
+   */
+  firstSession = true;
+
   /**
    * Constructor, initialise api client
    *
@@ -100,17 +95,7 @@ export class ConfigProvider {
    *
    * @param attribute requested attribute from app configuration
    */
-  public async getValue(attribute: keyof SCAppConfiguration) {
-    if (!this.initialised) {
-      try {
-        await this.init();
-      } catch (error) {
-        // don't throw ConfigFetchError if saved config is available
-        if (error.name === 'ConfigFetchError' && !this.initialised) {
-          throw error;
-        }
-      }
-    }
+  public getValue(attribute: keyof SCAppConfiguration) {
     if (typeof this.config.app[attribute] !== 'undefined') {
       return this.config.app[attribute];
     }
@@ -138,12 +123,10 @@ export class ConfigProvider {
   async init(): Promise<void> {
     let loadError;
     let fetchError;
-    this.initialised = false;
     // load saved configuration
     try {
       this.config = await this.loadLocal();
       this.firstSession = false;
-      this.initialised = true;
       this.logger.log(`initialised configuration from storage`);
       if (this.config.backend.SCVersion !== this.scVersion) {
         loadError = new WrongConfigVersionInStorage(
@@ -159,7 +142,6 @@ export class ConfigProvider {
     try {
       const fetchedConfig: SCIndexResponse = await this.fetch();
       await this.set(fetchedConfig);
-      this.initialised = true;
       this.logger.log(`initialised configuration from remote`);
     } catch (error) {
       fetchError = error;
@@ -169,7 +151,7 @@ export class ConfigProvider {
       throw new ConfigInitError();
     }
     if (typeof loadError !== 'undefined') {
-      throw loadError;
+      this.logger.warn(loadError);
     }
     if (typeof fetchError !== 'undefined') {
       throw fetchError;
@@ -182,7 +164,6 @@ export class ConfigProvider {
    * @throws SavedConfigNotAvailable if no configuration could be loaded
    */
   async loadLocal(): Promise<SCIndexResponse> {
-    await this.storageProvider.init();
     // get local configuration
     if (await this.storageProvider.has(STORAGE_KEY_CONFIG)) {
       return this.storageProvider.get<SCIndexResponse>(STORAGE_KEY_CONFIG);

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

src/app/modules/settings/settings.provider.ts

@@ -333,9 +333,9 @@ export class SettingsProvider {
    */
   public async init(): Promise<void> {
     try {
-      const settings: SCSetting[] = (await this.configProvider.getValue(
+      const settings: SCSetting[] = this.configProvider.getValue(
         'settings',
-      )) as SCSetting[];
+      ) as SCSetting[];
       for (const setting of settings) this.addSetting(setting);
 
       for (const category of Object.keys(this.settingsCache)) {