Answer:1 content projection

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

@@ -1,9 +1,52 @@
-import { ChangeDetectionStrategy, Component } from '@angular/core';
+import {
+  ChangeDetectionStrategy,
+  Component,
+  inject,
+  OnInit,
+} from '@angular/core';
+import { CityStore } from '../../data-access/city.store';
+import {
+  FakeHttpService,
+  randomCity,
+} from '../../data-access/fake-http.service';
+import { CardComponent } from '../../ui/card/card.component';
 
 @Component({
   selector: 'app-city-card',
-  template: 'TODO City',
-  imports: [],
+  template: `
+    <app-card
+      customClass="bg-color"
+      [imgTitle]="cardImg"
+      [list]="cities()"
+      (addNew)="addNewItem()"
+      (itemId)="deleteItem($event)" />
+  `,
+  styles: [
+    `
+      :host {
+        --card-background: rgba(79, 64, 242, 0.1);
+      }
+    `,
+  ],
+  imports: [CardComponent],
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
-export class CityCardComponent {}
+export class CityCardComponent implements OnInit {
+  private readonly http = inject(FakeHttpService);
+  private readonly store = inject(CityStore);
+
+  cities = this.store.cities;
+  cardImg = 'assets/img/city.png';
+
+  ngOnInit(): void {
+    this.http.fetchCities$.subscribe((t) => this.store.addAll(t));
+  }
+
+  addNewItem() {
+    this.store.addOne(randomCity());
+  }
+
+  deleteItem(id: number) {
+    this.store.deleteOne(id);
+  }
+}

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

@@ -1,40 +1,57 @@
 import {
   ChangeDetectionStrategy,
   Component,
+  computed,
   inject,
   OnInit,
 } from '@angular/core';
-import { FakeHttpService } from '../../data-access/fake-http.service';
+import {
+  FakeHttpService,
+  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';
 
 @Component({
   selector: 'app-student-card',
   template: `
     <app-card
+      customClass="bg-color"
+      [imgTitle]="cardImg"
       [list]="students()"
-      [type]="cardType"
-      customClass="bg-light-green" />
+      (addNew)="addNewItem()"
+      (itemId)="deleteItem($event)" />
   `,
   styles: [
     `
-      ::ng-deep .bg-light-green {
-        background-color: rgba(0, 250, 0, 0.1);
+      :host {
+        --card-background: rgba(0, 250, 0, 0.1);
       }
     `,
   ],
   imports: [CardComponent],
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
 export class StudentCardComponent implements OnInit {
-  private http = inject(FakeHttpService);
-  private store = inject(StudentStore);
+  private readonly http = inject(FakeHttpService);
+  private readonly store = inject(StudentStore);
 
-  students = this.store.students;
-  cardType = CardType.STUDENT;
+  students = computed(() => {
+    return this.store.students().map((item) => {
+      return { ...item, name: item.firstName };
+    });
+  });
+  cardImg = 'assets/img/student.webp';
 
   ngOnInit(): void {
     this.http.fetchStudents$.subscribe((s) => this.store.addAll(s));
   }
+
+  addNewItem() {
+    this.store.addOne(randStudent());
+  }
+
+  deleteItem(id: number) {
+    this.store.deleteOne(id);
+  }
 }

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

@@ -1,34 +1,50 @@
-import { Component, inject, OnInit } from '@angular/core';
-import { FakeHttpService } from '../../data-access/fake-http.service';
+import { Component, computed, inject, OnInit } from '@angular/core';
+import {
+  FakeHttpService,
+  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';
 
 @Component({
   selector: 'app-teacher-card',
   template: `
     <app-card
+      customClass="bg-color"
+      [imgTitle]="cardImg"
       [list]="teachers()"
-      [type]="cardType"
-      customClass="bg-light-red"></app-card>
+      (addNew)="addNewItem()"
+      (itemId)="deleteItem($event)" />
   `,
   styles: [
     `
-      ::ng-deep .bg-light-red {
-        background-color: rgba(250, 0, 0, 0.1);
+      :host {
+        --card-background: rgba(250, 0, 0, 0.1);
       }
     `,
   ],
   imports: [CardComponent],
 })
 export class TeacherCardComponent implements OnInit {
-  private http = inject(FakeHttpService);
-  private store = inject(TeacherStore);
+  private readonly http = inject(FakeHttpService);
+  private readonly store = inject(TeacherStore);
 
-  teachers = this.store.teachers;
-  cardType = CardType.TEACHER;
+  teachers = computed(() => {
+    return this.store.teachers().map((item) => {
+      return { ...item, name: item.firstName };
+    });
+  });
+  cardImg = 'assets/img/teacher.png';
 
   ngOnInit(): void {
     this.http.fetchTeachers$.subscribe((t) => this.store.addAll(t));
   }
+
+  addNewItem() {
+    this.store.addOne(randTeacher());
+  }
+
+  deleteItem(id: number) {
+    this.store.deleteOne(id);
+  }
 }

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

@@ -5,7 +5,7 @@ import { City } from '../model/city.model';
   providedIn: 'root',
 })
 export class CityStore {
-  private cities = signal<City[]>([]);
+  public cities = signal<City[]>([]);
 
   addAll(cities: City[]) {
     this.cities.set(cities);

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

@@ -1,8 +1,5 @@
 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 { Component, input, output } from '@angular/core';
 import { CardType } from '../../model/card.model';
 import { ListItemComponent } from '../list-item/list-item.component';
 
@@ -12,19 +9,14 @@ import { ListItemComponent } from '../list-item/list-item.component';
     <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" />
-      }
+      <img [ngSrc]="imgTitle()" width="200" height="200" priority />
 
       <section>
         @for (item of list(); track item) {
           <app-list-item
-            [name]="item.firstName"
-            [id]="item.id"
-            [type]="type()"></app-list-item>
+            (deleteEvent)="onDelete($event)"
+            [name]="item.name"
+            [id]="item.id" />
         }
       </section>
 
@@ -35,24 +27,28 @@ import { ListItemComponent } from '../list-item/list-item.component';
       </button>
     </div>
   `,
-  imports: [ListItemComponent, NgOptimizedImage],
+  styles: [
+    `
+      .bg-color {
+        background-color: var(--card-background);
+      }
+    `,
+  ],
+  imports: [NgOptimizedImage, ListItemComponent],
 })
 export class CardComponent {
-  private teacherStore = inject(TeacherStore);
-  private studentStore = inject(StudentStore);
-
   readonly list = input<any[] | null>(null);
-  readonly type = input.required<CardType>();
+  readonly type = input<CardType>();
   readonly customClass = input('');
-
-  CardType = CardType;
+  readonly imgTitle = input.required<string>();
+  readonly addNew = output<void>();
+  readonly itemId = output<number>();
 
   addNewItem() {
-    const type = this.type();
-    if (type === CardType.TEACHER) {
-      this.teacherStore.addOne(randTeacher());
-    } else if (type === CardType.STUDENT) {
-      this.studentStore.addOne(randStudent());
-    }
+    this.addNew.emit();
+  }
+
+  onDelete(id: number) {
+    this.itemId.emit(id);
   }
 }

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

@@ -1,12 +1,9 @@
 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',
@@ -22,19 +19,11 @@ import { CardType } from '../../model/card.model';
   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 type = input.required<CardType>();
+  deleteEvent = output<number>();
 
   delete(id: number) {
-    const type = this.type();
-    if (type === CardType.TEACHER) {
-      this.teacherStore.deleteOne(id);
-    } else if (type === CardType.STUDENT) {
-      this.studentStore.deleteOne(id);
-    }
+    this.deleteEvent.emit(id);
   }
 }