feat(poll): prevent submission, when there is no selection (#74)

src/lib/components/atoms/LogoOption.svelte

@@ -171,11 +171,6 @@
 		font-weight: 800;
 	}
 
-	h6 {
-		font-size: 0.9rem;
-		overflow: hidden;
-		text-overflow: ellipsis;
-	}
 	.text {
 		width: 100%;
 		white-space: nowrap;
@@ -186,8 +181,7 @@
 		background-color: var(--accent-low-opacity);
 	}
 
-	.clicked h2,
-	.clicked h6 {
+	.clicked h2 {
 		color: var(--white);
 	}
 

src/routes/poll/+page.svelte

@@ -9,7 +9,7 @@
 	import Button from '$lib/components/atoms/Button.svelte';
 
 	interface Selected {
-    [key: string] : string[];
+		[key: string]: string[];
 	}
 
 	let modalOpen = false;
@@ -37,7 +37,10 @@
 	let max = logoAmount;
 	let token = '';
 	let submit = false;
-	$: finalPage = currentPage >= logoPages;
+	let allowReviewSelections = false;
+	$: finalPage = false;
+	$: min = currentPage * logoAmount;
+	$: max = min + logoAmount;
 
 	async function exchange_token(bot_token: string) {
 		const response = await fetch('https://poll.revanced.app/auth/exchange', {
@@ -105,12 +108,19 @@
 	});
 
 	function previousPage() {
-		if (currentPage <= 0) return null;
+		if (currentPage <= 0 && !allowReviewSelections) {
+			if (allowReviewSelections) {
+				// If the current page is 0 and the user has reached the final page beforehand, go to the final page
+				currentPage = logoPages - 1;
+			} else {
+				// If the current page is 0 and the user has not reached the final page beforehand, return
+				return;
+			}
+		} else {
+			// If the current page is not 0, go to the previous page
 			currentPage--;
+		}
 		submit = false;
-
-		min = currentPage * logoAmount;
-		max = min + logoAmount;
 		transitionDirection = -5;
 	}
 
@@ -120,23 +130,46 @@
 	}
 
 	function nextPage() {
-		if (currentPage >= logoPages || submit) return null;
+		let nextPage = currentPage + 1;
+
+		// If the current page is the last page, set the current page to the first page
+		if (currentPage >= logoPages - 1) {
+			currentPage = 0;
+		} else {
 			currentPage++;
 
-		min = currentPage * logoAmount;
-		max = min + logoAmount;
+			// If the current page is now the last page, allow review selections and set the current page to the first page
+			if (currentPage >= logoPages - 1) {
+				allowReviewSelections = true;
+				nextPage = 0;
+			}
+		}
 
-		if (currentPage < logoPages) {
-			const nextPage = currentPage + 1;
 		const nextMin = nextPage * logoAmount;
 		const nextMax = nextMin + logoAmount;
+
 		logos.slice(nextMin, nextMax).forEach(({ variants }) => {
 			variants.forEach((variant) => preloadImage(variant.gdrive_direct_url));
 		});
-		}
 		transitionDirection = 5;
 	}
 
+	function stopReview() {
+		finalPage = false;
+		submit = false;
+	}
+
+	function reviewSelections() {
+		if (allowReviewSelections) {
+			finalPage = true;
+		}
+	}
+
+	function submitSelection() {
+		if (ui_selected_count < 1) return null;
+		submit = true;
+	}
+
 	function clearLogos() {
 		if (submit) {
 			return;
@@ -186,7 +219,7 @@
 			<h3>ReVanced</h3>
 			<h1>{finalPage ? 'Review selected logos' : 'Select logos'}</h1>
 			<h2>
-				{ui_selected_count}/{logos.length} selected · Page {Number(currentPage) + 1}/{logoPages + 1}
+				{ui_selected_count}/{logos.length} selected · Page {currentPage + 1}/{logoPages}
 			</h2>
 			<div class="top-custom-button-container">
 				<button on:click={() => (modalOpen = !modalOpen)}>How does this work?</button>
@@ -195,19 +228,6 @@
 		</div>
 
 		<div class="options-grid">
-			{#each logos.slice(min, max) as { variants, name }}
-				{#key currentPage}
-					<span in:fly={{ x: transitionDirection, easing: expoOut, duration: 1000 }}>
-						<LogoOption
-							bind:selected={selected[name]}
-							clicked={selected[name].length != 0}
-							{variants}
-							{name}
-						/>
-					</span>
-				{/key}
-			{/each}
-
 			{#if finalPage}
 				{#each logos as { variants, name }}
 					{#if selected[name].length != 0}
@@ -221,6 +241,19 @@
 						</span>
 					{/if}
 				{/each}
+			{:else}
+				{#each logos.slice(min, max) as { variants, name }}
+					{#key currentPage}
+						<span in:fly={{ x: transitionDirection, easing: expoOut, duration: 1000 }}>
+							<LogoOption
+								bind:selected={selected[name]}
+								clicked={selected[name].length != 0}
+								{variants}
+								{name}
+							/>
+						</span>
+					{/key}
+				{/each}
 			{/if}
 		</div>
 
@@ -254,11 +287,21 @@
 		{/if}
 	</div>
 	<div class="buttons-container">
-		<Button on:click={previousPage} unclickable={currentPage <= 0}>Previous</Button>
+		{#if !finalPage}
+			<Button on:click={previousPage} unclickable={currentPage <= 0 && !allowReviewSelections}
+				>Previous</Button
+			>
+		{/if}
+		<Button
+			on:click={finalPage ? stopReview : reviewSelections}
+			unclickable={!allowReviewSelections}
+		>
+			{finalPage ? 'Go back' : 'Preview selection'}</Button
+		>
 		<Button
 			kind="primary"
-			on:click={finalPage ? () => (submit = true) : nextPage}
-			unclickable={submit}
+			on:click={finalPage ? submitSelection : nextPage}
+			unclickable={submit || (finalPage && ui_selected_count < 1)}
 		>
 			{finalPage ? 'Submit' : 'Next'}
 		</Button>
@@ -270,8 +313,8 @@
 	<svelte:fragment slot="description">
 		<div class="desc">
 			<h6>
-				This is an approval voting system. Voters can choose any number of logo and variants. The logo that is
-				selected the most wins. Note that you can only vote once!
+				This is an approval voting system. Voters can choose any number of logo and variants. The
+				logo that is selected the most wins. Note that you can only vote once!
 			</h6>
 		</div>
 	</svelte:fragment>
@@ -314,11 +357,6 @@
 		margin-bottom: 0.5rem;
 	}
 
-	b {
-		color: var(--white);
-		margin-bottom: 1rem;
-	}
-
 	.buttons-container {
 		display: flex;
 		gap: 1rem;
@@ -333,11 +371,6 @@
 		border-top: 1px solid var(--grey-three);
 	}
 
-	.information {
-		text-align: center;
-		margin-bottom: 1rem;
-	}
-
 	.buttons {
 		display: flex;
 		justify-content: flex-end;