v3.2.0 — Downloads, context menu, badge, dark mode, more parsers + repo hygiene

[doctorlai-msrc]

v3.2.0 — Downloads, context menu, badge, dark mode, more parsers + repo hygiene

Summary

Turns the extension from a "find video URLs" helper into an actual download helper, adds several
low‑effort/high‑value UX features, broadens site coverage, and cleans up a few repo/tooling issues.
Bumps the version 3.1.0 → 3.2.0.

Heads‑up for reviewers: the diff shows ~7.5k±/6.7k− lines, but the vast majority is a one‑time
CRLF → LF normalization. Review with “Hide whitespace” (?w=1) to see the real change set.
Happy to split the normalization into its own PR if preferred (see Repo / tooling below).

Motivation

Despite being a “Download Helper”, the extension previously only rendered detected media as links —
users still had to right‑click → Save As. This PR adds real one‑click downloads and the surrounding
UX users expect, plus a few new parsers and housekeeping.

✨ Features

Real one‑click downloads + clipboard

• Download button on each detected video/audio/image, using chrome.downloads (with a
  new‑tab fallback when a programmatic download is blocked).
• Copy, Download All, and Copy All actions.
• Buttons are wired via CSP‑safe jQuery event delegation (no inline handlers).
• Suggested filenames derived from the page title via new, unit‑tested helpers in
  js/functions.js: getFileExtension, sanitizeFilename, suggestFilename.

Right‑click context menu

• “Download this video / audio” (on <video>/<audio> elements).
• “Find videos on this page”.

Toolbar badge

• The action icon shows a count of media URLs detected on the current tab; cleared on navigation.

Dark mode

• A persisted Dark Mode toggle in Settings.

More site coverage (js/parsevideo.js)

• New site parsers: Dailymotion and Vimeo.
• New generic fallbacks: HTML <source> tags and embedded HLS .m3u8 playlists
  (added to the existing og:video / <video src> / video_url / mp4 strategies).

Internationalization

• New UI strings (download, copy, download_all, copy_all, copied, copy_failed,
  dark_mode, dark_desc) added to all 13 locales and wired into js/translate.js.

🔐 Permissions (Chrome Web Store)

• Added "downloads" and "contextMenus". No new host permissions; the broad content‑script
  scope is pre‑existing and unchanged.
• downloads adds the “Manage your downloads” warning, so the extension will require user
  re‑consent on auto‑update — expected for the new capability.
• All downloads are user‑initiated (button / context‑menu click), filenames are sanitized,
  there are no automatic/background downloads and no remote code — consistent with the
  single‑purpose policy.

🧹 Repo / tooling

• dist/dist.min.js removed from version control. It was a stale tracked build artifact;
  .gitignore already listed dist/. CI and npm run package rebuild it, and the README
  “Load unpacked” steps now include npm install && npm run build.
• Consistent line endings. Added .gitattributes (* text=auto eol=lf) and normalized all
  our source to LF. Vendored third‑party libs (jQuery, Bootstrap, MD5.js, m_inc.js,
  *.min.*) are preserved byte‑for‑byte; test/data/** is LF but exempt from whitespace
  linting (captured HTML). Also stripped pre‑existing trailing whitespace per .editorconfig.
• background.js hardening. Guarded the service‑worker IIFE so it no longer throws when the
  file is injected as a content script or when there is no active tab. Service‑worker‑only logic
  (badge + context menus) is gated to the SW context.
• Version bump to 3.2.0 across manifest.json, both package.json, and both lockfiles.

✅ Testing & validation

• npm run check is green: ESLint + Prettier + 129 Mocha tests passing.
• Coverage stays above gates (90/70): ~99.7% lines / ~81% branches.
• 5 new test specs + 2 fixtures:
  • test_parsevideo_dailymotion.js, test_parsevideo_vimeo.js,
    test_parsevideo_source_tag.js, test_parsevideo_m3u8.js, test_functions_filename.js
  • test/data/dailymotion-x2bu0q2.html, test/data/vimeo-151712690.html
• node --check passes on all changed legacy JS and all 13 locales; all 15
  _locales/*/messages.json parse.
• npm run package produces the Web Store zip (simple-video-download-helper-3.2.0.zip).
• git diff --check is clean.

Files of interest

• Parsers/helpers (unit‑tested): js/parsevideo.js, js/functions.js
• Popup UX: js/video.js, main.html, css/main.css
• Service worker: js/background.js, manifest.json
• i18n: js/translate.js, lang/*.js, _locales/*/messages.json

Reviewer checklist

• Review with whitespace hidden (the bulk of the diff is EOL normalization).
• Confirm the two new permissions (downloads, contextMenus) are acceptable for the listing,
  and note the one‑time re‑consent on update.
• Decide whether to keep the line‑ending normalization in this PR or split it out.
• Sanity‑check the unpacked build: cd video-url-parser && npm install && npm run build,
  then load video-url-parser/ via chrome://extensions.

Notes

• The published Web Store build still excludes YouTube and adult sites (unchanged).
• The new parsers follow the existing pattern‑based approach; generic <source> / .m3u8
  fallbacks improve coverage on many sites beyond the two named additions.