From f4e8e354a795eea9f6e3d08daaedde9901464207 Mon Sep 17 00:00:00 2001
From: William Diakite <william.diakite@gmail.com>
Date: Wed, 11 Oct 2023 09:54:09 -0400
Subject: [PATCH] add Carousel component

---
 src/lib/components/Carousel.svelte | 201 +++++++++++++++++++++++++++++
 src/lib/styles/style.css           |  15 +++
 2 files changed, 216 insertions(+)
 create mode 100644 src/lib/components/Carousel.svelte

diff --git a/src/lib/components/Carousel.svelte b/src/lib/components/Carousel.svelte
new file mode 100644
index 0000000..9ffe15b
--- /dev/null
+++ b/src/lib/components/Carousel.svelte
@@ -0,0 +1,201 @@
+<script lang="ts">
+	import { onMount } from 'svelte';
+	import { localize } from '$lib/i18n/i18n';
+
+	export let data;
+
+	let currentIndex = 0;
+	let nextIndex = 1;
+	let transitioning = false;
+
+	let touchStartX = 0;
+	let touchEndX = 0;
+
+	const setIndex = (idx: number) => {
+		clearInterval(interval);
+		const direction = idx > currentIndex ? 'fromRight' : 'fromLeft';
+		nextIndex = idx;
+		currentIndex = idx;
+		startTransition(direction);
+	};
+	const increaseIndex = () => {
+		const outgoing = document.querySelector('#outgoing');
+		outgoing?.classList.remove('outgoing-left');
+		nextIndex = (currentIndex + 1) % data.length;
+		startTransition('fromRight');
+	};
+	const decreaseIndex = () => {
+		const outgoing = document.querySelector('#outgoing');
+		outgoing?.classList.remove('outgoing-right');
+		outgoing?.classList.add('outgoing-left');
+
+		nextIndex = currentIndex - 1;
+		if (nextIndex < 0) nextIndex = data.length - 1;
+
+		startTransition('fromLeft');
+	};
+
+	const startTransition = (direction: 'fromLeft' | 'fromRight') => {
+		requestAnimationFrame(() => {
+			const outgoing = document.querySelector('#outgoing');
+			if (!outgoing) console.warn('No outgoing image found');
+
+			outgoing?.classList.remove('incoming');
+
+			if (direction === 'fromRight') {
+				outgoing.classList.add('outgoing-right');
+			} else {
+				outgoing.classList.add('outgoing-left');
+			}
+
+			transitioning = true;
+			currentIndex = nextIndex;
+
+			setTimeout(() => {
+				transitioning = false;
+				outgoing?.classList.remove('outgoing-right');
+				outgoing?.classList.remove('outgoing-left');
+				outgoing?.classList.add('incoming');
+			}, 500); // This should match the transition duration in CSS
+		});
+	};
+
+	const handleTouchStart = (event: TouchEvent) => {
+		touchStartX = event.touches[0].clientX;
+	};
+
+	const handleTouchMove = (event: TouchEvent) => {
+		touchEndX = event.touches[0].clientX;
+	};
+
+	const handleTouchEnd = () => {
+		clearInterval(interval);
+		if (touchStartX > touchEndX + 30) {
+			// Swiped left
+			increaseIndex();
+		} else if (touchStartX + 30 < touchEndX) {
+			// Swiped right
+			decreaseIndex();
+		}
+	};
+
+	let interval: NodeJS.Timer;
+	const startRotation = () => (interval = setInterval(increaseIndex, 5000));
+	const stopRotation = () => clearInterval(interval);
+	const resetInterval = () => {
+		stopRotation();
+		startRotation();
+	};
+
+	onMount(() => {
+		startRotation();
+		return () => stopRotation();
+	});
+
+	$: current = $localize(data)[currentIndex];
+	$: next = $localize(data)[nextIndex];
+</script>
+
+<div
+	class="carousel"
+	on:touchstart={handleTouchStart}
+	on:touchmove={handleTouchMove}
+	on:touchend={handleTouchEnd}
+>
+	<img
+		class="active-img"
+		src={`/images/projects/banners/${current.meta.bannerImage}`}
+		alt="Hello"
+	/>
+	<img id="outgoing" src={`/images/projects/banners/${next.meta.bannerImage}`} alt="Hello" />
+	<div class="banner">
+		<h1 class="title">{current.meta.title}</h1>
+		<p class="description">{current.meta.description}</p>
+		<ul class="controls">
+			{#each data as _, i}
+				<li class="control">
+					<button
+						id={`${i}`}
+						class={`control-dot ${i === currentIndex ? 'carousel-active' : ''}`}
+						on:click={() => setIndex(i)}
+					/>
+				</li>
+			{/each}
+		</ul>
+	</div>
+</div>
+
+<style>
+	.carousel {
+		position: relative;
+		grid-column: 2 / -2;
+		height: 20rem;
+		overflow: hidden;
+	}
+
+	img {
+		width: 100%;
+		height: 100%;
+		object-fit: cover;
+		filter: grayscale();
+		position: absolute;
+		top: 0;
+		left: 0;
+		opacity: 0;
+		transition: transform 0.5s ease;
+	}
+
+	img.active-img {
+		opacity: 1;
+	}
+
+	.banner {
+		position: absolute;
+		display: flex;
+		flex-direction: column;
+		top: 0;
+		width: 30%;
+		height: 100%;
+		background-color: rgb(38, 38, 38, 0.7);
+		color: white;
+		padding: 1rem;
+	}
+
+	.title {
+		font-size: 2.5rem;
+		font-weight: 400;
+		line-height: 2rem;
+		padding-bottom: 1.5rem;
+	}
+
+	.description {
+		line-height: 1.5rem;
+	}
+
+	.controls {
+		display: flex;
+		flex-direction: row;
+		justify-content: space-evenly;
+		column-gap: 0.5rem;
+		width: 50%;
+		border: none !important;
+		margin: auto;
+		margin-bottom: 1.5rem;
+	}
+
+	button {
+		--radius: 0.5rem;
+		all: unset;
+		width: var(--radius);
+		height: var(--radius);
+		border-radius: 50%;
+		/* background-color: white; */
+		border: solid 1px white;
+		cursor: pointer;
+	}
+
+	.carousel-active {
+		background-color: var(--clr-accent);
+		border: solid 1px var(--clr-accent);
+	}
+</style>
diff --git a/src/lib/styles/style.css b/src/lib/styles/style.css
index c42d942..14da3cf 100644
--- a/src/lib/styles/style.css
+++ b/src/lib/styles/style.css
@@ -34,6 +34,8 @@
     --presentation-stroke: solid 0.4rem rgba(245, 245, 245, 0.631);
 }
 
+
+
 * {
     box-sizing: border-box;
     inline-size: auto;
@@ -387,6 +389,19 @@ footer,
     margin-top: 3rem;
 }
 
+/* Carousel image */
+img.incoming {
+    opacity: 1;
+}
+
+img.outgoing-right {
+    transform: translateX(100%);
+}
+
+img.outgoing-left {
+    transform: translateX(-100%);
+}
+
 
 /** All touch screens */
 @media screen and (max-width: 1024px) {