From 13334b1e4cf0c12c121dc0ae55f80c1a4b19d941 Mon Sep 17 00:00:00 2001
From: Daniel Joo <daniel.h.joo@medtronic.com>
Date: Thu, 22 Jan 2026 11:04:52 -0800
Subject: [PATCH] feat: implement solution for content projection

---
 .../city-card/city-card.component.ts          | 40 +++++++++-
 .../student-card/student-card.component.ts    | 17 +++-
 .../teacher-card/teacher-card.component.ts    | 16 +++-
 .../src/app/data-access/city.store.ts         |  2 +-
 .../src/app/ui/card/card.component.ts         | 79 +++++++++----------
 .../app/ui/list-item/list-item.component.ts   | 26 +++---
 6 files changed, 116 insertions(+), 64 deletions(-)

diff --git a/apps/angular/1-projection/src/app/component/city-card/city-card.component.ts b/apps/angular/1-projection/src/app/component/city-card/city-card.component.ts
index 8895c8c84..9fb7d4cb7 100644
--- a/apps/angular/1-projection/src/app/component/city-card/city-card.component.ts
+++ b/apps/angular/1-projection/src/app/component/city-card/city-card.component.ts
@@ -1,9 +1,41 @@
-import { ChangeDetectionStrategy, Component } from '@angular/core';
+import { ChangeDetectionStrategy, Component, inject } from '@angular/core';
+import { CityStore } from '../../data-access/city.store';
+import {
+  FakeHttpService,
+  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"
+      (addItem)="addNewItem()"
+      (deleteItem)="deleteItem($event)"
+      pictureType="png"
+      customClass="bg-light-green" />
+  `,
+  imports: [CardComponent],
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
-export class CityCardComponent {}
+export class CityCardComponent {
+  private http = inject(FakeHttpService);
+  private store = inject(CityStore);
+  readonly cardType = CardType.CITY;
+  readonly cities = this.store.cities;
+
+  ngOnInit(): void {
+    this.http.fetchCities$.subscribe((c) => this.store.addAll(c));
+  }
+
+  addNewItem() {
+    this.store.addOne(randomCity());
+  }
+
+  deleteItem(id: number) {
+    this.store.deleteOne(id);
+  }
+}
diff --git a/apps/angular/1-projection/src/app/component/student-card/student-card.component.ts b/apps/angular/1-projection/src/app/component/student-card/student-card.component.ts
index bdfa4abd4..9c1d137d3 100644
--- a/apps/angular/1-projection/src/app/component/student-card/student-card.component.ts
+++ b/apps/angular/1-projection/src/app/component/student-card/student-card.component.ts
@@ -4,7 +4,10 @@ import {
   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';
@@ -15,6 +18,9 @@ import { CardComponent } from '../../ui/card/card.component';
     <app-card
       [list]="students()"
       [type]="cardType"
+      (addItem)="addNewItem()"
+      (deleteItem)="deleteItem($event)"
+      pictureType="webp"
       customClass="bg-light-green" />
   `,
   styles: [
@@ -30,11 +36,18 @@ import { CardComponent } from '../../ui/card/card.component';
 export class StudentCardComponent implements OnInit {
   private http = inject(FakeHttpService);
   private store = inject(StudentStore);
-
   students = this.store.students;
   cardType = CardType.STUDENT;
 
   ngOnInit(): void {
     this.http.fetchStudents$.subscribe((s) => this.store.addAll(s));
   }
+
+  addNewItem() {
+    this.store.addOne(randStudent());
+  }
+
+  deleteItem(id: number) {
+    this.store.deleteOne(id);
+  }
 }
diff --git a/apps/angular/1-projection/src/app/component/teacher-card/teacher-card.component.ts b/apps/angular/1-projection/src/app/component/teacher-card/teacher-card.component.ts
index adf0ad3c1..c4cc294d0 100644
--- a/apps/angular/1-projection/src/app/component/teacher-card/teacher-card.component.ts
+++ b/apps/angular/1-projection/src/app/component/teacher-card/teacher-card.component.ts
@@ -1,5 +1,8 @@
 import { Component, inject, OnInit } from '@angular/core';
-import { FakeHttpService } from '../../data-access/fake-http.service';
+import {
+  FakeHttpService,
+  randTeacher,
+} from '../../data-access/fake-http.service';
 import { TeacherStore } from '../../data-access/teacher.store';
 import { CardType } from '../../model/card.model';
 import { CardComponent } from '../../ui/card/card.component';
@@ -10,6 +13,9 @@ import { CardComponent } from '../../ui/card/card.component';
     <app-card
       [list]="teachers()"
       [type]="cardType"
+      (addItem)="addNewItem()"
+      (deleteItem)="deleteItem($event)"
+      pictureType="png"
       customClass="bg-light-red"></app-card>
   `,
   styles: [
@@ -31,4 +37,12 @@ export class TeacherCardComponent implements OnInit {
   ngOnInit(): void {
     this.http.fetchTeachers$.subscribe((t) => this.store.addAll(t));
   }
+
+  addNewItem() {
+    this.store.addOne(randTeacher());
+  }
+
+  deleteItem(id: number) {
+    this.store.deleteOne(id);
+  }
 }
diff --git a/apps/angular/1-projection/src/app/data-access/city.store.ts b/apps/angular/1-projection/src/app/data-access/city.store.ts
index a8b523569..9fbcb346b 100644
--- a/apps/angular/1-projection/src/app/data-access/city.store.ts
+++ b/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);
diff --git a/apps/angular/1-projection/src/app/ui/card/card.component.ts b/apps/angular/1-projection/src/app/ui/card/card.component.ts
index 1a6c3648c..218367a80 100644
--- a/apps/angular/1-projection/src/app/ui/card/card.component.ts
+++ b/apps/angular/1-projection/src/app/ui/card/card.component.ts
@@ -1,58 +1,57 @@
-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 { NgOptimizedImage, NgTemplateOutlet } from '@angular/common';
+import { 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-template #card let-cardTypeVal="cardType">
+      <div
+        class="flex w-fit flex-col gap-3 rounded-md border-2 border-black p-4"
+        [class]="customClass()">
+        <img
+          ngSrc="assets/img/{{ CardType[cardTypeVal()].toLowerCase() }}.{{
+            this.pictureType()
+          }}"
+          width="200"
+          height="200"
+          priority />
+        <section>
+          @for (item of list(); track item) {
+            <app-list-item
+              [name]="item.name"
+              [firstName]="item.firstName"
+              [lastName]="item.lastName"
+              [id]="item.id"
+              [type]="type()"
+              (deleteItem)="delete($event)" />
+          }
+        </section>
 
-      <section>
-        @for (item of list(); track item) {
-          <app-list-item
-            [name]="item.firstName"
-            [id]="item.id"
-            [type]="type()"></app-list-item>
-        }
-      </section>
+        <button
+          class="rounded-sm border border-blue-500 bg-blue-300 p-2"
+          (click)="addItem.emit()">
+          Add
+        </button>
+      </div>
+    </ng-template>
 
-      <button
-        class="rounded-sm border border-blue-500 bg-blue-300 p-2"
-        (click)="addNewItem()">
-        Add
-      </button>
-    </div>
+    <ng-container *ngTemplateOutlet="card; context: ctx"></ng-container>
   `,
-  imports: [ListItemComponent, NgOptimizedImage],
+  imports: [ListItemComponent, NgOptimizedImage, NgTemplateOutlet],
 })
 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('');
-
+  readonly pictureType = input.required<string>();
+  addItem = output<void>();
+  deleteItem = output<number>();
+  readonly ctx = { cardType: this.type };
   CardType = CardType;
 
-  addNewItem() {
-    const type = this.type();
-    if (type === CardType.TEACHER) {
-      this.teacherStore.addOne(randTeacher());
-    } else if (type === CardType.STUDENT) {
-      this.studentStore.addOne(randStudent());
-    }
+  delete(id: number) {
+    this.deleteItem.emit(id);
   }
 }
diff --git a/apps/angular/1-projection/src/app/ui/list-item/list-item.component.ts b/apps/angular/1-projection/src/app/ui/list-item/list-item.component.ts
index 5d504f372..e4ce5ba5e 100644
--- a/apps/angular/1-projection/src/app/ui/list-item/list-item.component.ts
+++ b/apps/angular/1-projection/src/app/ui/list-item/list-item.component.ts
@@ -1,19 +1,18 @@
 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">
+      {{ firstName() }} {{ lastName() }}
       {{ name() }}
-      <button (click)="delete(id())">
+      <button (click)="onDelete()">
         <img class="h-5" src="assets/svg/trash.svg" />
       </button>
     </div>
@@ -21,19 +20,14 @@ 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>();
+  readonly type = input<CardType>();
+  readonly name = input<string>();
+  readonly firstName = input<string>('');
+  readonly lastName = input<string>('');
+  deleteItem = 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);
-    }
+  onDelete() {
+    this.deleteItem.emit(this.id());
   }
 }