feat(doc): move pipe bug

apps/rxjs/pipe-bug/src/app/localDB.service.ts

@@ -0,0 +1,58 @@
+/* eslint-disable @typescript-eslint/member-ordering */
+import { randomError } from '@angular-challenges/shared/utils';
+import { Injectable } from '@angular/core';
+import { ComponentStore } from '@ngrx/component-store';
+import { of } from 'rxjs';
+
+export type TopicType = 'food' | 'book' | 'sport';
+
+interface Info {
+  id: number;
+  topic: TopicType;
+}
+
+interface DBState {
+  infos: Info[];
+}
+
+const initialState: DBState = {
+  infos: [
+    { id: 1, topic: 'book' },
+    { id: 2, topic: 'book' },
+    { id: 3, topic: 'book' },
+    { id: 4, topic: 'book' },
+    { id: 5, topic: 'food' },
+    { id: 6, topic: 'food' },
+    { id: 7, topic: 'book' },
+    { id: 8, topic: 'book' },
+    { id: 9, topic: 'book' },
+    { id: 10, topic: 'sport' },
+  ],
+};
+
+@Injectable({ providedIn: 'root' })
+export class LocalDBService extends ComponentStore<DBState> {
+  constructor() {
+    super(initialState);
+  }
+
+  infos$ = this.select((state) => state.infos);
+
+  searchByType = (type: TopicType) =>
+    this.select((state) => state.infos.filter((i) => i.topic === type));
+
+  deleteOne = this.updater(
+    (state, id: number): DBState => ({
+      infos: state.infos.filter((i) => i.id !== id),
+    })
+  );
+
+  deleteOneTopic = (id: number) =>
+    randomError({
+      success: () => {
+        this.deleteOne(id);
+        return of(true);
+      },
+      error: () => of(false),
+    });
+}