Answer:1

apps/angular/1-projection/src/app/component/city-card/city-card.component.ts

@@ -1,9 +1,48 @@
-import { ChangeDetectionStrategy, Component } from '@angular/core';
+import { NgOptimizedImage } from '@angular/common';
+import { ChangeDetectionStrategy, Component, inject } from '@angular/core';
+import { CityStore } from '../../data-access/city.store';
+import { randomCity } from '../../data-access/fake-http.service';
+import { CardType } from '../../model/card.model';
+import { CardComponent } from '../../ui/card/card.component';
 
 @Component({
   selector: 'app-city-card',
-  template: 'TODO City',
-  imports: [],
+  template: `
+    <app-card
+      [list]="cities()"
+      [type]="cardType"
+      (addNewItem)="addCity()"
+      (delete)="deleteCity($event)"
+      class="bg-light-blue">
+      <img
+        ngSrc="assets/img/city.png"
+        width="200"
+        height="200"
+        priority
+        ngProjectAs="card-img" />
+    </app-card>
+  `,
+  styles: [
+    `
+      .bg-light-blue {
+        background-color: rgba(0, 171, 250, 0.1);
+      }
+    `,
+  ],
+  imports: [CardComponent, NgOptimizedImage],
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
-export class CityCardComponent {}
+export class CityCardComponent {
+  private store = inject(CityStore);
+
+  readonly cities = this.store.cities;
+  readonly cardType = CardType.CITY;
+
+  addCity() {
+    this.store.addOne(randomCity());
+  }
+
+  deleteCity(id: number) {
+    this.store.deleteOne(id);
+  }
+}

apps/angular/1-projection/src/app/component/student-card/student-card.component.ts

@@ -1,10 +1,6 @@
-import {
-  ChangeDetectionStrategy,
-  Component,
-  inject,
-  OnInit,
-} from '@angular/core';
-import { FakeHttpService } from '../../data-access/fake-http.service';
+import { NgOptimizedImage } from '@angular/common';
+import { ChangeDetectionStrategy, Component, inject } from '@angular/core';
+import { randStudent } from '../../data-access/fake-http.service';
 import { StudentStore } from '../../data-access/student.store';
 import { CardType } from '../../model/card.model';
 import { CardComponent } from '../../ui/card/card.component';
@@ -15,26 +11,38 @@ import { CardComponent } from '../../ui/card/card.component';
     <app-card
       [list]="students()"
       [type]="cardType"
-      customClass="bg-light-green" />
+      (addNewItem)="addStudent()"
+      (delete)="deleteStudent($event)"
+      class="bg-light-green">
+      <img
+        ngSrc="assets/img/student.webp"
+        width="200"
+        height="200"
+        priority
+        ngProjectAs="card-img" />
+    </app-card>
   `,
   styles: [
     `
-      ::ng-deep .bg-light-green {
+      .bg-light-green {
         background-color: rgba(0, 250, 0, 0.1);
       }
     `,
   ],
-  imports: [CardComponent],
+  imports: [CardComponent, NgOptimizedImage],
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
-export class StudentCardComponent implements OnInit {
-  private http = inject(FakeHttpService);
+export class StudentCardComponent {
   private store = inject(StudentStore);
 
-  students = this.store.students;
-  cardType = CardType.STUDENT;
+  readonly students = this.store.students;
+  readonly cardType = CardType.STUDENT;
 
-  ngOnInit(): void {
-    this.http.fetchStudents$.subscribe((s) => this.store.addAll(s));
+  addStudent() {
+    this.store.addOne(randStudent());
+  }
+
+  deleteStudent(id: number) {
+    this.store.deleteOne(id);
   }
 }

apps/angular/1-projection/src/app/component/teacher-card/teacher-card.component.ts

@@ -1,5 +1,6 @@
-import { Component, inject, OnInit } from '@angular/core';
-import { FakeHttpService } from '../../data-access/fake-http.service';
+import { NgOptimizedImage } from '@angular/common';
+import { ChangeDetectionStrategy, Component, inject } from '@angular/core';
+import { randTeacher } from '../../data-access/fake-http.service';
 import { TeacherStore } from '../../data-access/teacher.store';
 import { CardType } from '../../model/card.model';
 import { CardComponent } from '../../ui/card/card.component';
@@ -10,25 +11,38 @@ import { CardComponent } from '../../ui/card/card.component';
     <app-card
       [list]="teachers()"
       [type]="cardType"
-      customClass="bg-light-red"></app-card>
+      (addNewItem)="addTeacher()"
+      (delete)="deleteTeacher($event)"
+      class="bg-light-red">
+      <img
+        ngSrc="assets/img/teacher.png"
+        width="200"
+        height="200"
+        priority
+        ngProjectAs="card-img" />
+    </app-card>
   `,
   styles: [
     `
-      ::ng-deep .bg-light-red {
+      .bg-light-red {
         background-color: rgba(250, 0, 0, 0.1);
       }
     `,
   ],
-  imports: [CardComponent],
+  imports: [CardComponent, NgOptimizedImage],
+  changeDetection: ChangeDetectionStrategy.OnPush,
 })
-export class TeacherCardComponent implements OnInit {
-  private http = inject(FakeHttpService);
+export class TeacherCardComponent {
   private store = inject(TeacherStore);
 
-  teachers = this.store.teachers;
-  cardType = CardType.TEACHER;
+  readonly teachers = this.store.teachers;
+  readonly cardType = CardType.TEACHER;
 
-  ngOnInit(): void {
-    this.http.fetchTeachers$.subscribe((t) => this.store.addAll(t));
+  addTeacher() {
+    this.store.addOne(randTeacher());
+  }
+
+  deleteTeacher(id: number) {
+    this.store.deleteOne(id);
   }
 }

apps/angular/1-projection/src/app/data-access/city.store.ts

@@ -1,11 +1,19 @@
-import { Injectable, signal } from '@angular/core';
+import { effect, inject, Injectable, signal } from '@angular/core';
 import { City } from '../model/city.model';
+import { FakeHttpService } from './fake-http.service';
 
 @Injectable({
   providedIn: 'root',
 })
 export class CityStore {
-  private cities = signal<City[]>([]);
+  private readonly http = inject(FakeHttpService);
+  public cities = signal<City[]>([]);
+
+  constructor() {
+    effect(() => {
+      this.http.fetchCities$.subscribe((c) => this.addAll(c));
+    });
+  }
 
   addAll(cities: City[]) {
     this.cities.set(cities);

apps/angular/1-projection/src/app/data-access/student.store.ts

@@ -1,12 +1,20 @@
-import { Injectable, signal } from '@angular/core';
+import { effect, inject, Injectable, signal } from '@angular/core';
 import { Student } from '../model/student.model';
+import { FakeHttpService } from './fake-http.service';
 
 @Injectable({
   providedIn: 'root',
 })
 export class StudentStore {
+  private readonly http = inject(FakeHttpService);
   public students = signal<Student[]>([]);
 
+  constructor() {
+    effect(() => {
+      this.http.fetchStudents$.subscribe((s) => this.addAll(s));
+    });
+  }
+
   addAll(students: Student[]) {
     this.students.set(students);
   }

apps/angular/1-projection/src/app/data-access/teacher.store.ts

@@ -1,11 +1,19 @@
-import { Injectable, signal } from '@angular/core';
+import { effect, inject, Injectable, signal } from '@angular/core';
 import { Teacher } from '../model/teacher.model';
+import { FakeHttpService } from './fake-http.service';
 
 @Injectable({
   providedIn: 'root',
 })
 export class TeacherStore {
-  public teachers = signal<Teacher[]>([]);
+  private readonly http = inject(FakeHttpService);
+  readonly teachers = signal<Teacher[]>([]);
+
+  constructor() {
+    effect(() => {
+      this.http.fetchTeachers$.subscribe((t) => this.addAll(t));
+    });
+  }
 
   addAll(teachers: Teacher[]) {
     this.teachers.set(teachers);

apps/angular/1-projection/src/app/ui/card/card.component.ts

@@ -1,58 +1,51 @@
-import { NgOptimizedImage } from '@angular/common';
-import { Component, inject, input } from '@angular/core';
-import { randStudent, randTeacher } from '../../data-access/fake-http.service';
-import { StudentStore } from '../../data-access/student.store';
-import { TeacherStore } from '../../data-access/teacher.store';
+import {
+  ChangeDetectionStrategy,
+  Component,
+  input,
+  output,
+} from '@angular/core';
 import { CardType } from '../../model/card.model';
 import { ListItemComponent } from '../list-item/list-item.component';
 
 @Component({
   selector: 'app-card',
   template: `
-    <div
-      class="flex w-fit flex-col gap-3 rounded-md border-2 border-black p-4"
-      [class]="customClass()">
-      @if (type() === CardType.TEACHER) {
-        <img ngSrc="assets/img/teacher.png" width="200" height="200" />
-      }
-      @if (type() === CardType.STUDENT) {
-        <img ngSrc="assets/img/student.webp" width="200" height="200" />
-      }
+    <ng-content select="card-img"></ng-content>
 
-      <section>
-        @for (item of list(); track item) {
-          <app-list-item
-            [name]="item.firstName"
-            [id]="item.id"
-            [type]="type()"></app-list-item>
-        }
-      </section>
+    <section>
+      @for (item of list(); track item) {
+        <app-list-item
+          [item]="item"
+          [type]="type()"
+          (deleteItem)="handleDelete($event)"></app-list-item>
+      }
+    </section>
 
-      <button
-        class="rounded-sm border border-blue-500 bg-blue-300 p-2"
-        (click)="addNewItem()">
-        Add
-      </button>
-    </div>
+    <button
+      class="rounded-sm border border-blue-500 bg-blue-300 p-2"
+      (click)="onAdd()"
+      ngProjectAs="card-add-btn">
+      Add
+    </button>
   `,
-  imports: [ListItemComponent, NgOptimizedImage],
+  host: {
+    class: 'flex w-fit flex-col gap-3 rounded-md border-2 border-black p-4',
+  },
+  imports: [ListItemComponent],
+  changeDetection: ChangeDetectionStrategy.OnPush,
 })
 export class CardComponent {
-  private teacherStore = inject(TeacherStore);
-  private studentStore = inject(StudentStore);
-
   readonly list = input<any[] | null>(null);
   readonly type = input.required<CardType>();
-  readonly customClass = input('');
 
-  CardType = CardType;
+  readonly addNewItem = output<any>();
+  readonly delete = output<number>();
+
+  onAdd() {
+    this.addNewItem.emit('');
+  }
 
-  addNewItem() {
-    const type = this.type();
-    if (type === CardType.TEACHER) {
-      this.teacherStore.addOne(randTeacher());
-    } else if (type === CardType.STUDENT) {
-      this.studentStore.addOne(randStudent());
-    }
+  handleDelete(id: number) {
+    this.delete.emit(id);
   }
 }

apps/angular/1-projection/src/app/ui/list-item/list-item.component.ts

@@ -1,40 +1,36 @@
 import {
   ChangeDetectionStrategy,
   Component,
-  inject,
   input,
+  output,
 } from '@angular/core';
-import { StudentStore } from '../../data-access/student.store';
-import { TeacherStore } from '../../data-access/teacher.store';
 import { CardType } from '../../model/card.model';
 
 @Component({
   selector: 'app-list-item',
   template: `
-    <div class="border-grey-300 flex justify-between border px-2 py-1">
-      {{ name() }}
-      <button (click)="delete(id())">
-        <img class="h-5" src="assets/svg/trash.svg" />
-      </button>
-    </div>
+    @if (type() === CardType.TEACHER || type() === CardType.STUDENT) {
+      {{ item().firstName }}
+    } @else if (type() === CardType.CITY) {
+      {{ item().name }}
+    }
+
+    <button (click)="onDelete(item().id)">
+      <img class="h-5" src="assets/svg/trash.svg" />
+    </button>
   `,
-  standalone: true,
+  host: { class: 'border-grey-300 flex justify-between border px-2 py-1' },
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
 export class ListItemComponent {
-  private teacherStore = inject(TeacherStore);
-  private studentStore = inject(StudentStore);
-
-  readonly id = input.required<number>();
-  readonly name = input.required<string>();
+  readonly item = input.required<any>();
   readonly type = input.required<CardType>();
 
-  delete(id: number) {
-    const type = this.type();
-    if (type === CardType.TEACHER) {
-      this.teacherStore.deleteOne(id);
-    } else if (type === CardType.STUDENT) {
-      this.studentStore.deleteOne(id);
-    }
+  readonly deleteItem = output<number>();
+
+  CardType = CardType;
+
+  onDelete(id: number) {
+    this.deleteItem.emit(id);
   }
 }