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Answer:50 #1255

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Answer:50 #1255

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28 changes: 15 additions & 13 deletions apps/signal/56-forms-and-signal/src/app/order.component.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -3,24 +3,26 @@ import {
Component,
computed,
input,
linkedSignal,
numberAttribute,
} from '@angular/core';
import { toSignal } from '@angular/core/rxjs-interop';
import { FormControl, FormGroup, ReactiveFormsModule } from '@angular/forms';
import { FormsModule } from '@angular/forms';
import { RouterLink } from '@angular/router';
import { products } from './products';

@Component({
selector: 'app-order',
imports: [RouterLink, ReactiveFormsModule],
imports: [RouterLink, FormsModule],
template: `
<h2 class="mb-5 w-full bg-gray-400 p-2 text-white">Order</h2>
<section class="flex flex-col gap-5">
<form class="flex items-center justify-between gap-5" [formGroup]="form">
<form class="flex items-center justify-between gap-5">
<label for="countries" class="mb-2 block text-nowrap text-gray-900">
Select a quantity
</label>
<select
formControlName="quantity"
[(ngModel)]="selectedQuantity"
[ngModelOptions]="{ standalone: true }"
id="countries"
class="block w-32 rounded-lg border border-gray-300 bg-gray-50 p-2.5 text-sm text-gray-900 focus:border-blue-500 focus:ring-blue-500">
<option value="1">1</option>
Expand All @@ -44,7 +46,7 @@ import { products } from './products';
</div>
<button
routerLink="/checkout"
[queryParams]="{ quantity: quantity() }"
[queryParams]="{ quantity: selectedQuantity() }"
queryParamsHandling="merge"
class="w-full rounded-full border bg-blue-500 p-2 text-white">
Checkout
Expand All @@ -54,18 +56,18 @@ import { products } from './products';
changeDetection: ChangeDetectionStrategy.OnPush,
})
export default class OrderComponent {
form = new FormGroup({
quantity: new FormControl(1, { nonNullable: true }),
productId = input('1');
quantity = input<number, string>(1, {
transform: (v) => numberAttribute(v, 1),
});

productId = input('1');
selectedQuantity = linkedSignal(() => this.quantity());
price = computed(
() => products.find((p) => p.id === this.productId())?.price ?? 0,
);
quantity = toSignal(this.form.controls.quantity.valueChanges, {
initialValue: this.form.getRawValue().quantity,
});
totalWithoutVat = computed(() => Number(this.price()) * this.quantity());
totalWithoutVat = computed(
() => Number(this.price()) * this.selectedQuantity(),
);
vat = computed(() => this.totalWithoutVat() * 0.21);
total = computed(() => this.totalWithoutVat() + this.vat());
}