fix(playlists)!: show newly created playlist instantly

src/lib/components/groove/CreatePlaylistDialog.svelte

@@ -1,11 +1,10 @@
 <script lang="ts">
 	import type { Snippet } from 'svelte';
 	import * as Dialog from '$lib/components/ui/dialog';
-	import { enhance } from '$app/forms';
 	import { Input } from '$lib/components/ui/input';
 	import { Button } from '$lib/components/ui/button';
 	import CirclePlus from 'virtual:icons/lucide/circle-plus';
-	import type { SubmitFunction } from '../../../routes/playlists/$types';
+	import { getLibraryState } from '$lib/library.svelte';
 
 	interface Props {
 		children?: Snippet;
@@ -14,28 +13,23 @@
 
 	let { children, ...props }: Props = $props();
 
+	const library = getLibraryState();
+
 	let name = $state('');
 	let submitting = $state(false);
 	let isOpen = $state(false);
 
-	const createPlaylist: SubmitFunction = async ({ cancel }) => {
-		if (submitting) {
-			cancel();
-			return;
+	async function createPlaylist() {
+		submitting = true;
+		const success = await library.createPlaylist(name, fetch);
+
+		if (success) {
+			isOpen = false;
+			name = '';
 		}
 
-		submitting = true;
-		isOpen = false;
-
-		return async ({ update }) => {
-			await update({
-				invalidateAll: true,
-				reset: true
-			});
-
-			submitting = false;
-		};
-	};
+		submitting = false;
+	}
 </script>
 
 <Dialog.Root bind:open={isOpen}>
@@ -48,22 +42,21 @@
 			<Dialog.Description>Make it memorable</Dialog.Description>
 		</Dialog.Header>
 
-		<form method="POST" action="/playlists?/create" use:enhance={createPlaylist}>
-			<Input
-				name="name"
-				placeholder="My awesome playlist"
-				minlength={1}
-				maxlength={24}
-				bind:value={name}
-			/>
-			<Button
-				type="submit"
-				class="mt-2 w-full"
-				disabled={submitting || name.length < 1 || name.length > 24}
-			>
-				<CirclePlus />
-				Create
-			</Button>
-		</form>
+		<Input
+			name="name"
+			placeholder="My awesome playlist"
+			minlength={1}
+			maxlength={24}
+			bind:value={name}
+		/>
+		<Button
+			type="submit"
+			class="mt-2 w-full"
+			disabled={submitting || name.length < 1 || name.length > 24}
+			onclick={createPlaylist}
+		>
+			<CirclePlus />
+			Create
+		</Button>
 	</Dialog.Content>
 </Dialog.Root>

src/lib/components/groove/PlaylistListing.svelte

@@ -26,35 +26,6 @@
 
 	const library = getLibraryState();
 	const player = getPlayerState();
-
-	const playPlaylist: SubmitFunction = async () => {
-		return async ({ update, result }) => {
-			await update({
-				invalidateAll: false,
-				reset: false
-			});
-
-			if (result.type === 'success' && result.data) {
-				player.applyStatus(result.data);
-			}
-		};
-	};
-
-	// TODO: Refactor
-	const deletePlaylist: SubmitFunction = async ({ action }) => {
-		const playlistId = parseInt(action.pathname.split('/playlists/')[1].split('/')[0]);
-
-		return async ({ update, result }) => {
-			await update({
-				invalidateAll: false,
-				reset: false
-			});
-
-			if (result.type === 'success') {
-				library.playlists = library.playlists.filter((p) => p.id !== playlistId);
-			}
-		};
-	};
 </script>
 
 <!-- svelte-ignore a11y_interactive_supports_focus -->
@@ -79,17 +50,23 @@
 			</div>
 		</div>
 		<div class="flex w-full justify-between gap-1">
-			<form method="POST" action="/playlists/{id}?/play" use:enhance={playPlaylist}>
-				<Button type="submit" variant="outline" size="icon">
-					<Play />
-				</Button>
-			</form>
+			<Button
+				type="submit"
+				variant="outline"
+				size="icon"
+				onclick={() => player.playPlaylist(id, fetch)}
+			>
+				<Play />
+			</Button>
 
-			<form method="POST" action="/playlists/{id}?/delete" use:enhance={deletePlaylist}>
-				<Button type="submit" variant="outline" size="icon">
-					<Trash2 />
-				</Button>
-			</form>
+			<Button
+				type="submit"
+				variant="outline"
+				size="icon"
+				onclick={() => library.deletePlaylist(id, fetch)}
+			>
+				<Trash2 />
+			</Button>
 		</div>
 	</div>
 </div>

src/lib/library.svelte.ts

@@ -14,6 +14,35 @@ class LibraryState {
 		this.playlists = new SvelteMap(playlists.map((p) => [p.id, p]));
 	}
 
+	async createPlaylist(name: string, fetch: typeof globalThis.fetch) {
+		const formData = new FormData();
+
+		formData.set('name', name);
+
+		const response = await fetch(`/playlists?/create`, {
+			method: 'POST',
+			headers: {
+				'x-sveltekit-action': 'true'
+			},
+			body: formData
+		});
+
+		if (!response.ok) {
+			return;
+		}
+
+		const result = deserialize(await response.text());
+
+		if (result.type === 'success' && result.data && 'playlist' in result.data) {
+			const playlist = result.data.playlist as Playlist;
+
+			this.playlists.set(playlist.id, playlist);
+			return playlist;
+		}
+
+		return;
+	}
+
 	async addTrackToPlaylist(playlistId: number, trackHash: string, fetch: typeof globalThis.fetch) {
 		const response = await fetch(`/playlists/${playlistId}/add-track/${trackHash}`, {
 			method: 'POST',
@@ -72,7 +101,12 @@ class LibraryState {
 		}
 	}
 
-	async swapPlaylistTracks(playlistId: number, aIndex: number, bIndex: number) {
+	async swapPlaylistTracks(
+		playlistId: number,
+		aIndex: number,
+		bIndex: number,
+		fetch: typeof globalThis.fetch
+	) {
 		const formData = new FormData();
 
 		formData.set('a', aIndex.toString());
@@ -103,6 +137,26 @@ class LibraryState {
 			}
 		}
 	}
+
+	async deletePlaylist(playlistId: number, fetch: typeof globalThis.fetch) {
+		const response = await fetch(`/playlists/${playlistId}?/delete`, {
+			method: 'POST',
+			headers: {
+				'x-sveltekit-action': 'true'
+			},
+			body: new FormData()
+		});
+
+		if (!response.ok) {
+			return;
+		}
+
+		const result = deserialize(await response.text());
+
+		if (result.type === 'success') {
+			this.playlists.delete(playlistId);
+		}
+	}
 }
 
 const LIBRARY_KEY = Symbol('GROOVE_LIBRARY');

src/routes/playlists/+page.svelte

@@ -8,7 +8,7 @@
 <div
 	class="grid grid-cols-2 gap-4 sm:grid-cols-4 md:grid-cols-5 lg:grid-cols-6 xl:grid-cols-7 2xl:grid-cols-8"
 >
-	{#each library.playlists as playlist}
+	{#each library.playlists as [_, playlist]}
 		<PlaylistListing id={playlist.id} name={playlist.name} tracks={playlist.tracks} />
 	{/each}
 </div>

src/routes/playlists/[id]/+page.svelte

@@ -36,7 +36,7 @@
 		const aIndex = e.dataTransfer?.getData('text/plain')!;
 		const bIndex = (e.currentTarget as HTMLElement).getAttribute('data-playlist-index')!;
 
-		library.swapPlaylistTracks(playlist.id, Number(aIndex), Number(bIndex));
+		library.swapPlaylistTracks(playlist.id, Number(aIndex), Number(bIndex), fetch);
 	}
 </script>