feat: Implement update management refactor with new dialog and settings handling

src/main/updates/update-download.ts

@@ -0,0 +1,34 @@
+import fs from "node:fs";
+import path from "node:path";
+import { Readable } from "node:stream";
+
+import { ReleaseUpdate, sanitizeFileName } from "./update-utils";
+
+type UpdateDownloadConfig = {
+  tempDirectory: string;
+};
+
+export async function downloadInstaller(update: ReleaseUpdate, config: UpdateDownloadConfig): Promise<string> {
+  const safeFileName = sanitizeFileName(update.installer.name);
+  const downloadDirectory = path.join(config.tempDirectory, "scoreko-updates");
+  const targetPath = path.join(downloadDirectory, safeFileName);
+
+  fs.mkdirSync(downloadDirectory, { recursive: true });
+
+  const response = await fetch(update.installer.downloadUrl);
+  if (!response.ok || !response.body) {
+    throw new Error(`Could not download update installer. HTTP ${response.status}.`);
+  }
+
+  await new Promise<void>((resolve, reject) => {
+    const fileStream = fs.createWriteStream(targetPath);
+    const responseStream = Readable.fromWeb(response.body as Parameters<typeof Readable.fromWeb>[0]);
+
+    responseStream.on("error", reject);
+    fileStream.on("error", reject);
+    fileStream.on("finish", resolve);
+    responseStream.pipe(fileStream);
+  });
+
+  return targetPath;
+}