feat(challenge11): creation

apps/rxjs-pipe-bug/src/app/app.component.ts

@@ -0,0 +1,56 @@
+/* eslint-disable @angular-eslint/component-selector */
+import { AsyncPipe, NgFor } from '@angular/common';
+import { Component, inject, Input } from '@angular/core';
+import { BehaviorSubject, take } from 'rxjs';
+import { AppService } from './app.service';
+import { TopicType } from './localDB.service';
+
+@Component({
+  standalone: true,
+  selector: 'button-delete-topic',
+  imports: [AsyncPipe],
+  template: `
+    <button (click)="deleteTopic()"><ng-content></ng-content></button>
+    <div>{{ message$$ | async }}</div>
+  `,
+})
+export class ButtonDeleteComponent {
+  @Input() topic!: TopicType;
+
+  message$$ = new BehaviorSubject<string>('');
+
+  private service = inject(AppService);
+
+  deleteTopic() {
+    this.service
+      .deleteOldTopics(this.topic)
+      .pipe(take(1))
+      .subscribe((result) =>
+        this.message$$.next(
+          result
+            ? `All ${this.topic} have been deleted`
+            : `Error: deletion of some ${this.topic} failed`
+        )
+      );
+  }
+}
+
+@Component({
+  standalone: true,
+  imports: [AsyncPipe, NgFor, ButtonDeleteComponent],
+  selector: 'app-root',
+  template: `
+    <div *ngFor="let item of all$ | async">
+      {{ item.id }} - {{ item.topic }}
+    </div>
+
+    <button-delete-topic topic="food">Delete Food</button-delete-topic>
+    <button-delete-topic topic="sport">Delete Sport</button-delete-topic>
+    <button-delete-topic topic="book">Delete Book</button-delete-topic>
+  `,
+})
+export class AppComponent {
+  private service = inject(AppService);
+
+  all$ = this.service.getAll$;
+}