Ensure deletion of speech times if related faction is deleted

projects/speech-statistics/src/app/auth/administration/factions/factions.component.ts

@@ -3,6 +3,7 @@ import {AngularFireDatabase, SnapshotAction} from '@angular/fire/compat/database
 import {Observable} from 'rxjs';
 import {Faction} from './faction';
 import {FactionInBodyService} from '../../shared/faction-in-body.service';
+import {SpeechTimeService} from '../../shared/speech-time.service';
 
 @Component({
   selector: 'app-factions',
@@ -13,7 +14,8 @@ export class FactionsComponent implements OnInit {
   public factions: Observable<SnapshotAction<Faction>[]> = new Observable<SnapshotAction<Faction>[]>();
 
   constructor(private database: AngularFireDatabase,
-              private factionInBodyService: FactionInBodyService) {
+              private factionInBodyService: FactionInBodyService,
+              private speechTimeService: SpeechTimeService) {
   }
 
   ngOnInit(): void {
@@ -33,6 +35,7 @@ export class FactionsComponent implements OnInit {
     if (key != null) {
       factionRef.remove(key);
       this.factionInBodyService.deleteFactions(key);
+      this.speechTimeService.deleteSpeechTimesOfFaction(key);
     }
   }
 }

projects/speech-statistics/src/app/auth/shared/speech-time.service.ts

@@ -34,4 +34,16 @@ export class SpeechTimeService {
       Promise.all(promises);
     })
   }
+
+  public deleteSpeechTimesOfFaction(factionKey: string): void {
+    const speechTimesRef = this.database.list<Speech>('speechTimes');
+    const affectedTimes = speechTimesRef.query.orderByChild('factionKey').equalTo(factionKey);
+    affectedTimes.once('value', snapshot => {
+      const promises: Promise<any>[] = [];
+      snapshot.forEach((child) => {
+        promises.push(child.ref.remove());
+      });
+      Promise.all(promises);
+    })
+  }
 }