feat: migration to TypeScript part 3

Co-authored-by: Su-Yong <simssy2205@gmail.com>

plugins/downloader/utils.ts

@@ -0,0 +1,39 @@
+import { app, BrowserWindow } from 'electron';
+import is from 'electron-is';
+
+export const getFolder = (customFolder: string) => customFolder || app.getPath('downloads');
+export const defaultMenuDownloadLabel = 'Download playlist';
+
+export const sendFeedback = (win: BrowserWindow, message?: unknown) => {
+  win.webContents.send('downloader-feedback', message);
+};
+
+export const cropMaxWidth = (image: Electron.NativeImage) => {
+  const imageSize = image.getSize();
+  // Standart youtube artwork width with margins from both sides is 280 + 720 + 280
+  if (imageSize.width === 1280 && imageSize.height === 720) {
+    return image.crop({
+      x: 280,
+      y: 0,
+      width: 720,
+      height: 720,
+    });
+  }
+
+  return image;
+};
+
+// Presets for FFmpeg
+export const presets = {
+  'None (defaults to mp3)': undefined,
+  'opus': {
+    extension: 'opus',
+    ffmpegArgs: ['-acodec', 'libopus'],
+  },
+};
+
+export const setBadge = (n: number) => {
+  if (is.linux() || is.macOS()) {
+    app.setBadgeCount(n);
+  }
+};