Update download logic

src/routes/+page.svelte

@@ -2,12 +2,12 @@
 	import { PUBLIC_VERSION } from '$env/static/public';
 	import supportedFormats from '$lib/common/supportedFormats.json';
 	import Loader from '$lib/components/Loader.svelte';
-	import { download } from '$lib/client/downloader';
 	import DownloadManager from '$lib/components/DownloadManager.svelte';
 	import { mount, unmount } from 'svelte';
 
 	let source = $state('youtube');
 	let link = $state('');
+	let downloading = $state(false);
 	let format = $state('mp3');
 	let showModal = $state(false);
 	let href = $state('');
@@ -15,6 +15,8 @@
 	let metadata = $state(false);
 	let logs = $state('');
 	let downloadManager: DownloadManager | null = null;
+	let progress = $state(0);
+	let filename = $state('');
 
 	const formats = Object.keys(supportedFormats).map((f) => {
 		return { value: f, label: f.toUpperCase() };
@@ -28,15 +30,46 @@
 		showModal = !showModal;
 	};
 
-	const dismiss = () => {
-		unmount(downloadManager);
+	const download = async (url: string) => {
+		const response = await fetch(url);
+
+		if (!response.ok) {
+			throw new Error('Network response was not ok');
+		}
+
+		const contentDisposition: string | null = response?.headers?.get('content-disposition');
+		filename = contentDisposition?.split('filename=')[1] || 'noname';
+		const contentLength: number = Number(response?.headers?.get('content-length'));
+		const reader = response?.body?.getReader();
+		const chunks: Uint8Array[] = [];
+		let receivedLength = 0;
+
+		while (true) {
+			const { done, value }: ReadableStreamReadResult<Uint8Array> = await reader!.read();
+			if (done) break;
+			if (value) {
+				chunks.push(value);
+				receivedLength += value.length;
+				progress = Math.round((receivedLength / contentLength) * 100);
+			}
+		}
+
+		const blob = new Blob(chunks);
+		const downloadUrl = URL.createObjectURL(blob);
+
+		const a = document.createElement('a');
+		a.href = downloadUrl;
+		a.download = filename;
+		a.click();
+		window.URL.revokeObjectURL(downloadUrl);
 	};
 
 	const onClick = async (evt) => {
 		evt.preventDefault();
 
-		const props = $state({ url: href });
-		downloadManager = mount(DownloadManager, { target: document.body, props, events: { dismiss } });
+		downloading = true;
+		await download(href);
+		downloading = false;
 
 		link = '';
 	};
@@ -187,6 +220,10 @@
 	</form>
 </div>
 
+{#if downloading}
+	<DownloadManager {filename} {progress}></DownloadManager>
+{/if}
+
 <!-- Modal -->
 {#if showModal}
 	<div class="fixed inset-0 z-50 flex items-center justify-center bg-black/90 text-green-300">