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import { noop } from 'lodash';
import React, { createRef, Component, ReactNode } from 'react';
import { CSSTransition } from 'react-transition-group';
import { isMobileView, MobileView } from '../ui/responsive';
import CheckoutStepHeader from './CheckoutStepHeader';
import CheckoutStepType from './CheckoutStepType';
export interface CheckoutStepProps {
heading?: ReactNode;
isActive?: boolean;
isComplete?: boolean;
isEditable?: boolean;
summary?: ReactNode;
type: CheckoutStepType;
onExpanded?(step: CheckoutStepType): void;
onEdit?(step: CheckoutStepType): void;
}
export default class CheckoutStep extends Component<CheckoutStepProps> {
private containerRef = createRef<HTMLLIElement>();
private contentRef = createRef<HTMLDivElement>();
private timeoutRef?: number;
private timeoutDelay?: number;
componentDidMount(): void {
const { isActive } = this.props;
if (isActive) {
this.focusStep();
}
}
componentDidUpdate(prevProps: Readonly<CheckoutStepProps>): void {
const { isActive } = this.props;
if (isActive && isActive !== prevProps.isActive) {
this.focusStep();
}
}
componentWillUnmount(): void {
if (this.timeoutRef) {
window.clearTimeout(this.timeoutRef);
this.timeoutRef = undefined;
}
}
render(): ReactNode {
const {
heading,
isActive,
isComplete,
isEditable,
onEdit,
summary,
type,
} = this.props;
return (
<li
className={ classNames(
'checkout-step',
'optimizedCheckout-checkoutStep',
{ [`checkout-step--${type}`]: !!type }
) }
ref={ this.containerRef }
>
<div className="checkout-view-header">
<CheckoutStepHeader
heading={ heading }
isActive={ isActive }
isComplete={ isComplete }
isEditable={ isEditable }
onEdit={ onEdit }
summary={ summary }
type={ type }
/>
</div>
{ this.renderContent() }
</li>
);
}
private renderContent(): ReactNode {
const { children, isActive } = this.props;
return <>
<MobileView>
{ matched => {
if (matched) {
return !isActive ? null : <div className="checkout-view-content">
{ children }
</div>;
}
return <CSSTransition
addEndListener={ this.handleTransitionEnd }
classNames="checkout-view-content"
in={ isActive }
mountOnEnter
timeout={ {} }
unmountOnExit
>
<div
className="checkout-view-content"
ref={ this.contentRef }
>
{ children }
</div>
</CSSTransition>;
} }
</MobileView>
</>;
}
private focusStep(): void {
const delay = isMobileView() ? 0 : this.getTransitionDelay();
this.timeoutRef = window.setTimeout(() => {
const input = this.getChildInput();
const position = this.getScrollPosition();
const { type, onExpanded = noop } = this.props;
if (input) {
input.focus();
}
Eif (position !== undefined && !isNaN(position)) {
window.scrollTo(0, position);
}
onExpanded(type);
this.timeoutRef = undefined;
}, delay);
}
private getChildInput(): HTMLElement | undefined {
const container = this.containerRef.current;
Iif (!container) {
return;
}
const input = container.querySelector<HTMLElement>('input, select, textarea');
return input ? input : undefined;
}
private getScrollPosition(): number | undefined {
const container = this.getParentContainer();
const { isComplete } = this.props;
Iif (!container || window !== window.top) {
return;
}
const topOffset = isComplete ? 0 : window.innerHeight / 5;
const containerOffset = container.getBoundingClientRect().top + (window.scrollY || window.pageYOffset);
return containerOffset - topOffset;
}
// For now, we need to find the parent container because `CheckoutStep`
// isn't the outer container yet. Once both the header and body are
// moved inside this component, we can remove the lookup.
private getParentContainer(): HTMLElement | undefined {
let container: HTMLElement | null = this.containerRef.current;
while (container && container.parentElement) {
Iif (container.parentElement.classList.contains('checkout-step')) {
return container.parentElement;
}
container = container.parentElement;
}
return this.containerRef.current ? this.containerRef.current : undefined;
}
private getTransitionDelay(): number {
Iif (this.timeoutDelay !== undefined) {
return this.timeoutDelay;
}
// Cache the result to avoid unnecessary reflow
this.timeoutDelay = parseFloat(this.contentRef.current ? getComputedStyle(this.contentRef.current).transitionDuration : '0s') * 1000;
return this.timeoutDelay;
}
private handleTransitionEnd: (node: HTMLElement, done: () => void) => void = (node, done) => {
node.addEventListener('transitionend', ({ target }) => {
if (target === node) {
done();
}
});
};
}
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