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Children,
cloneElement,
HTMLAttributes,
isValidElement,
PropsWithChildren,
ReactElement,
useEffect,
useId,
useRef,
useState,
} from "react";
import { Heading } from "components";
import { Chevron } from "components/icons";
import { useOnSmallScreen } from "hooks";
interface CarouselProps {
title?: string;
gap: number;
}
export default function Carousel({
title,
gap = 24,
children,
}: PropsWithChildren<CarouselProps>): ReactElement | null {
const [timesMoveCarousel, setTimesMoveCarousel] = useState(0);
const totalItems = Children.count(children);
const containerRef = useRef<HTMLDivElement>(null);
const carouselRef = useRef<HTMLElement>(null);
const [maxMoves, setMaxMoves] = useState(0);
const isSmallScreen = useOnSmallScreen();
const id = useId();
useEffect(() => {
function updateSize() {
if (!carouselRef.current || !containerRef.current) return;
const carousel = carouselRef.current;
const itemWidth = carousel.children[0].clientWidth + gap;
const container = containerRef.current;
const containerWidth = container.offsetWidth;
const itemsInMainContainer = Math.floor(containerWidth / itemWidth);
const maximumMoves =
Math.ceil(totalItems / (itemsInMainContainer || 1)) - 1;
const shouldMove =
timesMoveCarousel >= 0 && timesMoveCarousel <= maximumMoves;
const spaceToMove = timesMoveCarousel * itemsInMainContainer * itemWidth;
setMaxMoves(maximumMoves);
Iif (timesMoveCarousel > maximumMoves) {
setTimesMoveCarousel(maximumMoves);
}
carousel.style.transform = `translateX(-${spaceToMove}px)`;
if (shouldMove) {
carouselRef.current.style.transform = `translateX(-${spaceToMove}px)`;
}
}
window.addEventListener("resize", updateSize);
updateSize();
return () => {
window.removeEventListener("resize", updateSize);
};
}, [gap, timesMoveCarousel, totalItems]);
if (totalItems === 0) {
return null;
}
return (
<div className="carousel-container" ref={containerRef}>
<div className="header">
<Heading id={`title-${id}`} number={2}>
{title}
</Heading>
<div className="button-container">
{maxMoves > 0 && !isSmallScreen ? (
<>
<button
type="button"
aria-label="Previous"
disabled={timesMoveCarousel <= 0}
onClick={() => {
Iif (timesMoveCarousel <= 0) return;
setTimesMoveCarousel((prev) => prev - 1);
}}
>
<Chevron rotation={"0deg"} />
</button>
<button
type="button"
aria-label="Next"
disabled={timesMoveCarousel >= maxMoves}
onClick={() => {
Iif (timesMoveCarousel >= maxMoves) return;
setTimesMoveCarousel((prev) => prev + 1);
}}
>
<Chevron rotation={"180deg"} />
</button>
</>
) : null}
</div>
</div>
<section
ref={carouselRef}
className="carousel-content"
aria-describedby={`title-${id}`}
>
{Children.map(children, (child, number) => {
if (isValidElement(child) && carouselRef.current) {
const itemWidth = carouselRef.current.children[0].clientWidth + gap;
const containerWidth = containerRef.current?.offsetWidth ?? 0;
const itemsInMainContainer = Math.floor(containerWidth / itemWidth);
const minRange = itemsInMainContainer * timesMoveCarousel;
const maxRange = itemsInMainContainer * (timesMoveCarousel + 1);
const shouldFocus = number < maxRange && number >= minRange;
return cloneElement(child, {
...child.props,
tabIndex: shouldFocus ? undefined : -1,
"aria-hidden": shouldFocus ? "false" : "true",
style: { scrollSnapAlign: "start" },
} as Partial<unknown> & HTMLAttributes<HTMLElement>);
}
return child;
})}
</section>
<style jsx>{`
.carousel-container {
margin: 10px 0 30px;
}
section.carousel-content > :global(*) {
width: min-content;
}
.header {
display: flex;
justify-content: space-between;
align-items: center;
}
section {
display: flex;
grid-gap: ${gap}px;
margin: 20px 0 50px 0;
transition: 400ms ease-in;
}
.button-container {
display: flex;
gap: 16px;
}
button {
display: flex;
align-items: center;
background-color: rgba(0, 0, 0, 0.7);
border: none;
border-radius: 50%;
color: #fff;
height: 32px;
justify-content: center;
position: relative;
width: 32px;
cursor: pointer;
}
button:disabled {
cursor: not-allowed;
opacity: 0.6;
}
@media (max-width: 768px) {
section {
overflow-x: scroll;
scroll-snap-type: x mandatory;
-webkit-overflow-scrolling: touch;
width: 100%;
grid-gap: 0;
margin: 20px 0;
}
section::-webkit-scrollbar {
display: none;
}
}
`}</style>
</div>
);
}
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