Add more visual hints for drag and drop, remove unneeded loading button hackery

src/lib/components/DNDGroup.svelte

@@ -1,9 +1,10 @@
 <script lang="ts">
 	import * as Card from '$lib/components/ui/card/index.js';
-	import { dndzone } from 'svelte-dnd-action';
+	import { dndzone, SHADOW_ITEM_MARKER_PROPERTY_NAME } from 'svelte-dnd-action';
 	import { flip } from 'svelte/animate';
 	import { expoOut } from 'svelte/easing';
 	import { truncate } from '$lib/utils';
+	import { fade } from 'svelte/transition';
 
 	let { items = $bindable(), image = false, type = 'default' } = $props();
 
@@ -15,38 +16,37 @@
 	function handleDndFinalize(e: CustomEvent<any>) {
 		items = e.detail.items;
 	}
-</script>
+	function transformDraggedElement(draggedEl: HTMLElement | undefined) {
+		if (!draggedEl) {
+			return;
+		}
+		const card = draggedEl.querySelector('.bg-card') as HTMLElement;
 
-<section
+		if (!card) {
-	use:dndzone={{
+			return;
-		items,
+		}
-		flipDurationMs,
+
-		type: type,
+		card.classList.add('shadow-foreground/25');
-		dropTargetStyle: {}
+	}
-	}}
+
-	onconsider={handleDndConsider}
+	let cardClass = $derived(
-	onfinalize={handleDndFinalize}
+		`hover select-none overflow-hidden rounded-xl border bg-card text-card-foreground shadow shadow-foreground/15  ${
-	class="grid grid-cols-3 items-center gap-4 sm:gap-8 md:gap-10 lg:gap-14"
+			type === 'names'
->
-	{#each items as item, i (item.id)}
-		<div animate:flip={{ duration: flipDurationMs, easing: expoOut }}>
-			<Card.Root
-				class="select-none overflow-hidden rounded-xl border bg-card text-card-foreground shadow shadow-foreground/15 transition-shadow hover:shadow-foreground/25 {type ===
-				'names'
 				? 'border-red-400 '
 				: type === 'artists'
 					? 'border-purple-400 '
-						: 'border-blue-400'}"
+					: 'border-blue-400'
-			>
+		}`
+	);
+</script>
+
+{#snippet card(item, i)}
 	{#if image}
-					<Card.Content class="p-0">
 		<img class="aspect-square w-full object-cover" alt="Album Art" src={item.value} />
 		<input type="hidden" name="{type}_{i}" value={item.value} />
-					</Card.Content>
 	{:else}
-					<Card.Content>
 		<p
-							class="text-center {type === 'names'
+			class="p-6 text-center {type === 'names'
 				? 'text-red-900 dark:text-red-200'
 				: type === 'artists'
 					? 'text-purple-900 dark:text-purple-200'
@@ -59,9 +59,38 @@
 			{/if}
 		</p>
 		<input type="hidden" name="{type}_{i}" value={item.value} />
-					</Card.Content>
 	{/if}
+{/snippet}
+
+<section
+	use:dndzone={{
+		items,
+		flipDurationMs,
+		type: type,
+		dropTargetStyle: {},
+		dropTargetClasses: ['bg-muted/50', 'dark:bg-muted/25', 'ring-2', 'ring-muted'],
+		transformDraggedElement: transformDraggedElement
+	}}
+	onconsider={handleDndConsider}
+	onfinalize={handleDndFinalize}
+	class="grid grid-cols-3 items-center gap-2 rounded-xl p-3 transition-colors sm:gap-6 md:gap-8 lg:gap-12 xl:gap-14"
+>
+	{#each items as item, i (item.id)}
+		<div animate:flip={{ duration: flipDurationMs, easing: expoOut }} class="relative">
+			{#if item[SHADOW_ITEM_MARKER_PROPERTY_NAME]}
+				<div
+					in:fade={{ duration: 200, easing: expoOut }}
+					class="{cardClass} visible border-transparent bg-transparent opacity-50 shadow-transparent"
+				>
+					{@render card(item, i)}
+				</div>
+			{:else}
+				<Card.Root class={cardClass}>
+					<Card.Content class="p-0">
+						{@render card(item, i)}
+					</Card.Content>
 				</Card.Root>
+			{/if}
 		</div>
 	{/each}
 </section>

src/routes/(trivia)/pakubiiti/+page.svelte

@@ -8,17 +8,11 @@
 	import type { PageData } from './$types';
 	import { enhance } from '$app/forms';
 
-	let { data, form }: { data: PageData; form: FormData } = $props();
+	let { data }: { data: PageData; form: FormData } = $props();
 
-	let loading = $state(true);
+	let loading = $state(false);
 	let oldAlbums: SpotifyApi.AlbumObjectSimplified[] = $state([]);
 
-	$effect(() => {
-		// this is a hack to disable grayscale, please ignore
-		// eslint-disable-next-line no-constant-binary-expression
-		loading = false && form?.success;
-	});
-
 	// Used when user answers wrong and no new data comes in
 	$effect(() => {
 		if (data.streamed?.albums) {
@@ -44,7 +38,34 @@
 	</div>
 {/snippet}
 
-<AlertDialog.Root open={form?.solved === false}>
+{#snippet playArea(albums, placeholder = false)}
+	{#if placeholder}
+		{#each { length: 2 } as _}
+			<section class="grid grid-cols-3 items-center gap-14">
+				{#each { length: 3 } as _}
+					<Skeleton class="h-[5.25rem] w-full rounded-xl " />
+				{/each}
+			</section>
+			<Separator />
+		{/each}
+
+		<section class="grid grid-cols-3 items-center gap-14">
+			{#each { length: 3 } as _}
+				<Skeleton class="aspect-square h-auto max-w-full rounded-xl object-cover" />
+			{/each}
+		</section>
+	{:else}
+		<DndGroup items={albums.names} type="names"></DndGroup>
+		<Separator />
+		<DndGroup items={albums.artists} type="artists"></DndGroup>
+		<Separator />
+		<DndGroup items={albums.images} image type="images"></DndGroup>
+	{/if}
+
+	{@render footer(placeholder)}
+{/snippet}
+
+<AlertDialog.Root open={data.playing === false}>
 	<AlertDialog.Content>
 		<AlertDialog.Header>
 			<AlertDialog.Title>
@@ -83,43 +104,16 @@
 		action="?/submit"
 		method="POST"
 		use:enhance
-		class="grid w-full gap-6 transition-all {loading || data?.playing === false ? 'grayscale' : ''}"
+		class="grid w-full gap-4 transition-all {loading || data?.playing === false ? 'grayscale' : ''}"
 	>
 		{#if data?.streamed?.albums}
 			{#await data.streamed.albums}
-				{#each { length: 2 } as _}
+				{@render playArea({}, true)}
-					<section class="grid grid-cols-3 items-center gap-14">
-						{#each { length: 3 } as _}
-							<Skeleton class="h-[5.25rem] w-full rounded-xl " />
-						{/each}
-					</section>
-					<Separator />
-				{/each}
-
-				<section class="grid grid-cols-3 items-center gap-14">
-					{#each { length: 3 } as _}
-						<Skeleton class="aspect-square h-auto max-w-full rounded-xl object-cover" />
-					{/each}
-				</section>
-
-				{@render footer(true)}
 			{:then albums}
-				<DndGroup items={albums.names} type="names"></DndGroup>
+				{@render playArea(albums)}
-				<Separator />
-				<DndGroup items={albums.artists} type="artists"></DndGroup>
-				<Separator />
-				<DndGroup items={albums.images} image type="images"></DndGroup>
-
-				{@render footer(false)}
 			{/await}
 		{:else}
-			<DndGroup items={oldAlbums.names} type="names"></DndGroup>
+			{@render playArea(oldAlbums)}
-			<Separator />
-			<DndGroup items={oldAlbums.artists} type="artists"></DndGroup>
-			<Separator />
-			<DndGroup items={oldAlbums.images} image type="images"></DndGroup>
-
-			{@render footer(false)}
 		{/if}
 	</form>
 </main>