feat(challenge 7): begin ngrx notification work

apps/ngrx-notification/src/app/app.component.ts

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+import { Component } from '@angular/core';
+import { StudentComponent } from './student.component';
+import { TeacherComponent } from './teacher.component';
+
+@Component({
+  standalone: true,
+  imports: [TeacherComponent, StudentComponent],
+  selector: 'app-root',
+  template: `
+    <teacher></teacher>
+    <student></student>
+  `,
+  styles: [
+    `
+      :host {
+        display: flex;
+        gap: 20px;
+      }
+    `,
+  ],
+})
+export class AppComponent {}

apps/ngrx-notification/src/app/backend/push.service.ts

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+import { Injectable } from '@angular/core';
+import { BehaviorSubject, tap, timer } from 'rxjs';
+import { randStudent } from '../model/student.model';
+import { randTeacher } from '../model/teacher.model';
+
+@Injectable({ providedIn: 'root' })
+export class PushService {
+  private notificationSubject = new BehaviorSubject<any>(undefined);
+  notification$ = this.notificationSubject.asObservable();
+
+  init() {
+    this.startTeacherNotification();
+    this.startStudentNotification();
+  }
+
+  private startTeacherNotification() {
+    timer(0, 4000)
+      .pipe(tap(() => this.notificationSubject.next(randTeacher())))
+      .subscribe();
+  }
+
+  private startStudentNotification() {
+    timer(1000, 3000)
+      .pipe(tap(() => this.notificationSubject.next(randStudent())))
+      .subscribe();
+  }
+}

apps/ngrx-notification/src/app/data-access/notification.service.ts

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+import { Injectable } from '@angular/core';
+import { filter } from 'rxjs';
+import { PushService } from '../backend/push.service';
+import { Push } from '../model/push.model';
+import { isStudent } from '../model/student.model';
+import { isTeacher } from '../model/teacher.model';
+import { StudentStore } from './student.store';
+import { TeacherStore } from './teacher.store';
+
+@Injectable({ providedIn: 'root' })
+export class NotificationService {
+  constructor(
+    private pushService: PushService,
+    private teacherStore: TeacherStore,
+    private studentStore: StudentStore
+  ) {}
+
+  init() {
+    this.pushService.notification$
+      .pipe(filter(Boolean))
+      .subscribe((notification: Push) => {
+        console.log(notification);
+        if (isTeacher(notification)) {
+          this.teacherStore.addOne(notification);
+        }
+        if (isStudent(notification)) {
+          this.studentStore.addOne(notification);
+        }
+      });
+  }
+}

apps/ngrx-notification/src/app/data-access/student.store.ts

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+import { Injectable } from '@angular/core';
+import { BehaviorSubject } from 'rxjs';
+import { Student } from '../model/student.model';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class StudentStore {
+  private students = new BehaviorSubject<Student[]>([]);
+  students$ = this.students.asObservable();
+
+  addAll(students: Student[]) {
+    this.students.next(students);
+  }
+
+  addOne(student: Student) {
+    this.students.next([...this.students.value, student]);
+  }
+
+  deleteOne(id: number) {
+    this.students.next(this.students.value.filter((s) => s.id !== id));
+  }
+}

apps/ngrx-notification/src/app/data-access/teacher.store.ts

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+import { Injectable } from '@angular/core';
+import { BehaviorSubject } from 'rxjs';
+import { Teacher } from '../model/teacher.model';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class TeacherStore {
+  private teachers = new BehaviorSubject<Teacher[]>([]);
+  teachers$ = this.teachers.asObservable();
+
+  addAll(teachers: Teacher[]) {
+    this.teachers.next(teachers);
+  }
+
+  addOne(teacher: Teacher) {
+    this.teachers.next([...this.teachers.value, teacher]);
+  }
+
+  deleteOne(id: number) {
+    this.teachers.next(this.teachers.value.filter((t) => t.id !== id));
+  }
+}

apps/ngrx-notification/src/app/model/push.model.ts

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+export type PushType = 'teacher' | 'student';
+
+export interface Push {
+  type: PushType;
+}

apps/ngrx-notification/src/app/model/student.model.ts

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+import {
+  incrementalNumber,
+  randFirstName,
+  randLastName,
+  randWord,
+} from '@ngneat/falso';
+import { Push } from './push.model';
+
+export interface Student extends Push {
+  id: number;
+  firstname: string;
+  lastname: string;
+  school: string;
+}
+
+const factoryStudent = incrementalNumber();
+
+export const randStudent = (): Student => ({
+  id: factoryStudent(),
+  firstname: randFirstName(),
+  lastname: randLastName(),
+  school: randWord(),
+  type: 'student',
+});
+
+export const isStudent = (notif: Push): notif is Student => {
+  return notif.type === 'student';
+};

apps/ngrx-notification/src/app/model/teacher.model.ts

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+import {
+  incrementalNumber,
+  rand,
+  randFirstName,
+  randLastName,
+} from '@ngneat/falso';
+import { Push } from './push.model';
+
+export const subject = [
+  'Sciences',
+  'History',
+  'English',
+  'Maths',
+  'Sport',
+] as const;
+export type Subject = typeof subject[number];
+
+export interface Teacher extends Push {
+  id: number;
+  firstname: string;
+  lastname: string;
+  subject: Subject;
+}
+
+const factoryTeacher = incrementalNumber();
+
+export const randTeacher = () => ({
+  id: factoryTeacher(),
+  firstname: randFirstName(),
+  lastname: randLastName(),
+  subject: rand(subject),
+  type: 'teacher',
+});
+
+export const isTeacher = (notif: Push): notif is Teacher => {
+  return notif.type === 'teacher';
+};

apps/ngrx-notification/src/app/student.component.ts

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+/* eslint-disable @angular-eslint/component-selector */
+import { AsyncPipe, NgFor } from '@angular/common';
+import { Component } from '@angular/core';
+import { StudentStore } from './data-access/student.store';
+
+@Component({
+  standalone: true,
+  imports: [NgFor, AsyncPipe],
+  selector: 'student',
+  template: `
+    <h3>STUDENTS</h3>
+    <div *ngFor="let student of students$ | async">
+      {{ student.firstname }}
+    </div>
+  `,
+  styles: [
+    `
+      :host {
+        display: block;
+        width: fit-content;
+        height: fit-content;
+        border: 1px solid red;
+        padding: 4px;
+      }
+    `,
+  ],
+})
+export class StudentComponent {
+  students$ = this.studentStore.students$;
+
+  constructor(private studentStore: StudentStore) {}
+}

apps/ngrx-notification/src/app/teacher.component.ts

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+import { AsyncPipe, NgFor } from '@angular/common';
+import { Component } from '@angular/core';
+import { TeacherStore } from './data-access/teacher.store';
+
+@Component({
+  standalone: true,
+  imports: [NgFor, AsyncPipe],
+  selector: 'teacher',
+  template: `
+    <h3>TEACHERS</h3>
+    <div *ngFor="let teacher of teacher$ | async">
+      {{ teacher.firstname }}
+    </div>
+  `,
+  styles: [
+    `
+      :host {
+        display: block;
+        width: fit-content;
+        height: fit-content;
+        border: 1px solid red;
+        padding: 4px;
+      }
+    `,
+  ],
+})
+export class TeacherComponent {
+  teacher$ = this.teacherStore.teachers$;
+
+  constructor(private teacherStore: TeacherStore) {}
+}

apps/ngrx-notification/src/environments/environment.prod.ts

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+export const environment = {
+  production: true,
+};

apps/ngrx-notification/src/environments/environment.ts

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+// This file can be replaced during build by using the `fileReplacements` array.
+// `ng build` replaces `environment.ts` with `environment.prod.ts`.
+// The list of file replacements can be found in `angular.json`.
+
+export const environment = {
+  production: false,
+};
+
+/*
+ * For easier debugging in development mode, you can import the following file
+ * to ignore zone related error stack frames such as `zone.run`, `zoneDelegate.invokeTask`.
+ *
+ * This import should be commented out in production mode because it will have a negative impact
+ * on performance if an error is thrown.
+ */
+// import 'zone.js/plugins/zone-error';  // Included with Angular CLI.

apps/ngrx-notification/src/index.html

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+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <title>NgrxNotification</title>
+    <base href="/" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="icon" type="image/x-icon" href="favicon.ico" />
+  </head>
+  <body>
+    <app-root></app-root>
+  </body>
+</html>

apps/ngrx-notification/src/main.ts

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+import { APP_INITIALIZER, enableProdMode, inject } from '@angular/core';
+import { bootstrapApplication } from '@angular/platform-browser';
+import { of } from 'rxjs';
+import { AppComponent } from './app/app.component';
+import { PushService } from './app/backend/push.service';
+import { NotificationService } from './app/data-access/notification.service';
+import { environment } from './environments/environment';
+
+if (environment.production) {
+  enableProdMode();
+}
+
+bootstrapApplication(AppComponent, {
+  providers: [
+    {
+      provide: APP_INITIALIZER,
+      multi: true,
+      useFactory: () => {
+        inject(PushService).init();
+        return () => of(true);
+      },
+    },
+    {
+      provide: APP_INITIALIZER,
+      multi: true,
+      useFactory: () => {
+        inject(NotificationService).init();
+        return () => of(true);
+      },
+    },
+  ],
+}).catch((err) => console.error(err));

apps/ngrx-notification/src/polyfills.ts

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+/**
+ * This file includes polyfills needed by Angular and is loaded before the app.
+ * You can add your own extra polyfills to this file.
+ *
+ * This file is divided into 2 sections:
+ *   1. Browser polyfills. These are applied before loading ZoneJS and are sorted by browsers.
+ *   2. Application imports. Files imported after ZoneJS that should be loaded before your main
+ *      file.
+ *
+ * The current setup is for so-called "evergreen" browsers; the last versions of browsers that
+ * automatically update themselves. This includes recent versions of Safari, Chrome (including
+ * Opera), Edge on the desktop, and iOS and Chrome on mobile.
+ *
+ * Learn more in https://angular.io/guide/browser-support
+ */
+
+/***************************************************************************************************
+ * BROWSER POLYFILLS
+ */
+
+/**
+ * By default, zone.js will patch all possible macroTask and DomEvents
+ * user can disable parts of macroTask/DomEvents patch by setting following flags
+ * because those flags need to be set before `zone.js` being loaded, and webpack
+ * will put import in the top of bundle, so user need to create a separate file
+ * in this directory (for example: zone-flags.ts), and put the following flags
+ * into that file, and then add the following code before importing zone.js.
+ * import './zone-flags';
+ *
+ * The flags allowed in zone-flags.ts are listed here.
+ *
+ * The following flags will work for all browsers.
+ *
+ * (window as any).__Zone_disable_requestAnimationFrame = true; // disable patch requestAnimationFrame
+ * (window as any).__Zone_disable_on_property = true; // disable patch onProperty such as onclick
+ * (window as any).__zone_symbol__UNPATCHED_EVENTS = ['scroll', 'mousemove']; // disable patch specified eventNames
+ *
+ *  in IE/Edge developer tools, the addEventListener will also be wrapped by zone.js
+ *  with the following flag, it will bypass `zone.js` patch for IE/Edge
+ *
+ *  (window as any).__Zone_enable_cross_context_check = true;
+ *
+ */
+
+/***************************************************************************************************
+ * Zone JS is required by default for Angular itself.
+ */
+import 'zone.js'; // Included with Angular CLI.
+
+/***************************************************************************************************
+ * APPLICATION IMPORTS
+ */

apps/ngrx-notification/src/styles.scss

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+/* You can add global styles to this file, and also import other style files */