Function register

src/ipc/downloads.js:180–972

(getMainWindow)

// ── IPC registration ──────────────────────────────────────────────────────────

function register(getMainWindow) {
  _getMainWindow = getMainWindow;

  // ── downloader binary detection ──────────────────────────────────────────
  ipcMain.handle("check-downloader", (_, folderPath) => {
    if (!folderPath) return { exists: false, reason: "no_folder" };
    let entries;
    try {
      entries = fs.readdirSync(folderPath);
    } catch (e) {
      const reason =
        e.code === "EACCES" ? "folder_permission" : "folder_unreadable";
      return { exists: false, reason };
    }
    if (!entries.includes("_internal")) {
      return { exists: false, reason: "no_internal" };
    }
    const binary = entries.find((e) => {
      if (e === "_internal" || e.startsWith(".")) return false;
      try {
        const stat = fs.statSync(path.join(folderPath, e));
        if (!stat.isFile()) return false;
        return process.platform === "win32"
          ? e.endsWith(".exe")
          : !!(stat.mode & 0o111);
      } catch {
        return false;
      }
    });
    if (!binary) return { exists: false, reason: "no_executable" };

    // Store the validated path in the Main process only and hand a token to
    // the Renderer.  The Renderer passes the token back when starting a
    // download; the real path is never exposed outside the Main process.
    const token = crypto.randomUUID();
    trustedBinaryPaths.set(token, path.join(folderPath, binary));
    return { exists: true, token };
  });

  // ── start download ────────────────────────────────────────────────────────
  ipcMain.handle(
    "run-download",
    (
      _,
      {
        token,
        m3u8Url,
        name,
        downloadPath,
        mediaId,
        mediaType,
        season,
        episode,
        posterPath,
        tmdbId,
        subtitles,
      },
    ) => {