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@@ -11,4 +11,7 @@
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}
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ISBN: {{ b.isbn }}
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</div>
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</article>
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}
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ISBN: {{ b.isbn }}
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</div>
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+
<footer>
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<button type="button" class="secondary" (click)="likeBook()">Like</button>
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</footer>
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</article>
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@@ -1,4 +1,4 @@
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-
import { Component, input } from '@angular/core';
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import { Book } from '../../shared/book';
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@@ -10,4 +10,9 @@ import { Book } from '../../shared/book';
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})
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export class BookItem {
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readonly book = input.required<Book>();
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}
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+
import { Component, input, output } from '@angular/core';
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import { Book } from '../../shared/book';
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})
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export class BookItem {
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readonly book = input.required<Book>();
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+
readonly like = output<Book>();
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+
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likeBook() {
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+
this.like.emit(this.book());
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}
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}
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@@ -1,8 +1,20 @@
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<section>
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<h1>Books</h1>
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<div>
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@for (b of books(); track b.isbn) {
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-
<app-book-item [book]="b" />
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}
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</div>
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</section>
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+
<section>
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+
<h1>Favorite Books</h1>
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+
<button type="button" (click)="clearLikedBooks()">Clear</button>
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<ul>
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@for (b of likedBooks(); track b.isbn) {
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<li>{{ b.title }} ({{ b.isbn }})</li>
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+
} @empty {
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<li>No books liked.</li>
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+
}
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+
</ul>
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+
</section>
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+
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<section>
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<h1>Books</h1>
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<div>
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@for (b of books(); track b.isbn) {
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+
<app-book-item [book]="b" (like)="addLikedBook($event)" />
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}
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</div>
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</section>
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@@ -11,6 +11,7 @@ import { BookItem } from '../book-item/book-item';
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})
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export class BookList {
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readonly books = signal<Book[]>([]);
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constructor() {
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| 16 |
this.books.set([
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@@ -34,4 +35,18 @@ export class BookList {
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| 34 |
},
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]);
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}
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| 37 |
}
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| 11 |
})
|
| 12 |
export class BookList {
|
| 13 |
readonly books = signal<Book[]>([]);
|
| 14 |
+
readonly likedBooks = signal<Book[]>([]);
|
| 15 |
|
| 16 |
constructor() {
|
| 17 |
this.books.set([
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|
| 35 |
},
|
| 36 |
]);
|
| 37 |
}
|
| 38 |
+
|
| 39 |
+
addLikedBook(newLikedBook: Book) {
|
| 40 |
+
const foundBook = this.likedBooks().find(
|
| 41 |
+
(b) => b.isbn === newLikedBook.isbn
|
| 42 |
+
);
|
| 43 |
+
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| 44 |
+
if (!foundBook) {
|
| 45 |
+
this.likedBooks.update((likedBooks) => [...likedBooks, newLikedBook]);
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| 46 |
+
}
|
| 47 |
+
}
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| 48 |
+
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| 49 |
+
clearLikedBooks() {
|
| 50 |
+
this.likedBooks.set([]);
|
| 51 |
+
}
|
| 52 |
}
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