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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 | 8x 8x 8x 8x 8x 8x 8x 8x 5x 5x 5x 5x 10x 5x 5x 5x 5x 5x 5x 3x 5x 1x 5x 5x | import { ChangeDetectionStrategy, Component, Input, OnInit } from '@angular/core';
import { range } from 'lodash-es';
import { Observable, combineLatest } from 'rxjs';
import { filter, map, shareReplay } from 'rxjs/operators';
import { v4 as uuid } from 'uuid';
import { ProductContextFacade } from 'ish-core/facades/product-context.facade';
import { FormsService } from 'ish-shared/forms/utils/forms.service';
@Component({
selector: 'ish-product-quantity',
templateUrl: './product-quantity.component.html',
styleUrls: ['./product-quantity.component.scss'],
changeDetection: ChangeDetectionStrategy.OnPush,
})
export class ProductQuantityComponent implements OnInit {
@Input() type: 'input' | 'select' | 'counter' = 'counter';
@Input() elementId: string = uuid();
visible$: Observable<boolean>;
quantity$: Observable<number>;
ariaDescribedByIds$: Observable<string>;
min$: Observable<number>;
max$: Observable<number>;
step$: Observable<number>;
hasQuantityError$: Observable<boolean>;
quantityError$: Observable<string>;
selectValues$: Observable<number[]>;
cannotIncrease$: Observable<boolean>;
cannotDecrease$: Observable<boolean>;
constructor(private context: ProductContextFacade) {}
ngOnInit() {
this.visible$ = this.context.select('displayProperties', 'quantity');
this.quantity$ = this.context.select('quantity').pipe(filter(n => typeof n === 'number' && !isNaN(n)));
this.min$ = this.context.select('minQuantity');
this.max$ = this.context.select('maxQuantity');
this.step$ = this.context.select('stepQuantity');
this.hasQuantityError$ = this.context.select('hasQuantityError').pipe(shareReplay(1));
this.quantityError$ = this.context.select('quantityError');
this.ariaDescribedByIds$ = this.hasQuantityError$.pipe(
map(hasQuantityError =>
hasQuantityError ? FormsService.addAriaDescribedById('', `${this.elementId}-validation-error`) : undefined
)
);
this.selectValues$ = combineLatest([this.min$, this.max$, this.step$]).pipe(
map(([min, max, step]) => range(min, max + 1, step))
);
this.cannotIncrease$ = combineLatest([this.max$, this.quantity$]).pipe(map(([max, quantity]) => quantity >= max));
this.cannotDecrease$ = combineLatest([this.min$, this.quantity$]).pipe(map(([min, quantity]) => quantity <= min));
}
private setValue(value: number) {
this.context.set('quantity', () => value);
}
private setNextValue(value: number) {
const max = this.context.get('maxQuantity');
const min = this.context.get('minQuantity');
const step = this.context.get('stepQuantity');
this.setValue(value > max ? max : value < min ? min : value - (value % step));
}
increase() {
this.setNextValue(this.context.get('quantity') + this.context.get('stepQuantity'));
}
decrease() {
this.setNextValue(this.context.get('quantity') - this.context.get('stepQuantity'));
}
change(target: EventTarget) {
this.setValue(Number.parseInt((target as HTMLDataElement).value, 10));
}
}
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