refactor(repo): promote tauri app to repository root

src/utils/downloads.ts

@@ -0,0 +1,54 @@
+import type { DownloadCategory } from '../bindings/DownloadCategory';
+export type { DownloadCategory } from '../bindings/DownloadCategory';
+
+const MEDIA_DOMAINS = [
+  'youtube.com',
+  'youtu.be',
+  'twitter.com',
+  'x.com',
+  'twitch.tv',
+  'vimeo.com',
+  'instagram.com',
+  'tiktok.com',
+  'reddit.com',
+  'soundcloud.com',
+  'facebook.com'
+];
+
+export const categoryForFileName = (fileName: string): DownloadCategory => {
+  const ext = fileName.split('.').pop()?.toLowerCase() || '';
+  if (['mp4', 'mkv', 'avi', 'mov', 'wmv', 'flv', 'webm', 'm4v'].includes(ext)) return 'Movies';
+  if (['mp3', 'wav', 'aac', 'flac', 'ogg', 'm4a', 'wma'].includes(ext)) return 'Musics';
+  if (['pdf', 'doc', 'docx', 'xls', 'xlsx', 'ppt', 'pptx', 'txt', 'rtf'].includes(ext)) return 'Documents';
+  if (['exe', 'dmg', 'apk', 'app', 'pkg', 'deb', 'rpm', 'msi', 'iso', 'bin', 'run'].includes(ext)) return 'Applications';
+  if (['jpg', 'jpeg', 'png', 'gif', 'webp', 'bmp', 'tiff', 'svg'].includes(ext)) return 'Pictures';
+  if (['zip', 'rar', '7z', 'tar', 'gz', 'xz', 'bz2'].includes(ext)) return 'Compressed';
+  return 'Other';
+};
+
+export const fileNameFromUrl = (rawUrl: string): string => {
+  try {
+    const url = new URL(rawUrl);
+    const pathName = url.pathname.split('/').filter(Boolean).pop();
+    if (pathName) {
+      const decoded = decodeURIComponent(pathName).trim();
+      if (decoded && decoded !== '.' && decoded !== '..') {
+        return decoded.replace(/[\/\\?%*:|"<>]/g, '-');
+      }
+    }
+  } catch {
+    // Fall through to the stable generic name.
+  }
+  return 'download';
+};
+
+export const isMediaUrl = (rawUrl: string): boolean => {
+  try {
+    const url = new URL(rawUrl);
+    return MEDIA_DOMAINS.some(domain =>
+      url.hostname === domain || url.hostname.endsWith(`.${domain}`)
+    );
+  } catch {
+    return false;
+  }
+};