Files
mangaBookmark/CLAUDE.md
T
sulthan ebc7a546c5 feat: password-gated web UI on the same backend (#1)
Adds a password-gated browser UI for the bookmark list, served by the same Go
binary and container as the userscript API.

## What

- `GET /` — list page, or the login page when there is no session (200, no redirect).
- `POST /login`, `POST /logout` — stateless HMAC session cookie, 60-day Max-Age.
- `GET /ui/list?tab=all|fav`, `POST /ui/bookmarks/{key}/favorite`,
  `POST /ui/bookmarks/{key}/chapter`, `DELETE /ui/bookmarks/{key}` — htmx fragments.
- `GET /static/*` — embedded `style.css`, `htmx.min.js`, `filter.js`.

Mobile-first dark CSS, 2–3 column grid at ≥900px, "Continue reading" strip of the
five most recent series, NEW badge, client-side title search, no build step.

## Stack

Go `html/template` + htmx 2.0.4 (vendored, 50 KB) + plain CSS. No npm, no bundler.
Templates and assets are `go:embed`-ed, so `CGO_ENABLED=0` and the distroless
image still hold.

## Auth

`WEB_PASSWORD` gates the UI; unset means the web routes are never registered and
`/` returns 404. Session cookie is `HttpOnly`, `SameSite=Lax`, `Secure` when the
request is HTTPS. The signing key derives from `API_TOKEN` + `WEB_PASSWORD`, so
rotating either logs every browser out. Login is rate-limited to 10 failures per
20 minutes per client IP, keyed on the **rightmost** `X-Forwarded-For` entry
(Traefik appends the observed peer, so the leftmost is client-spoofable). CGNAT
lockout is a known, accepted limitation — the window self-heals.

## Invariants preserved

- A session cookie never authenticates `/bookmarks*`. That API stays JSON +
  bearer token, unchanged, as does the userscript.
- `Store.Upsert` is byte-for-byte unmodified. Every UI write goes
  read-modify-write through the new `Store.Get`, so the conditional-`updated_at`
  rule (favouriting must not reorder the list, a chapter override must) lives in
  exactly one function.

## Deployment

`docker-compose.prod.yml` gains a second Traefik router on `MANGA_WEB_HOST`
pointing at the same service — one container, one certificate resolver, no second
service. Both `MANGA_API_HOST` and `MANGA_WEB_HOST` are required (`:?`), with no
example fallback in `.env.example`: a placeholder there would make Traefik
silently publish the UI on a domain you do not own. Needs a DNS A/AAAA record for
`manga.<domain>`. See `DEPLOY.md` §1b.

## Docs

- Design: `docs/superpowers/specs/2026-07-25-web-ui-design.md`
- Plan: `plans/2026-07-25-web-ui-implementation-plan.md`

## Verification

`gofmt` clean, `go vet`, `go test -race ./...`, `CGO_ENABLED=0 go build`, a real
`docker build` + curl smoke test, and a Playwright pass covering login
reject/accept, favourite-without-reorder, chapter edit, delete-with-confirm,
search, tab switch + back button, 390px with no horizontal overflow, and zero JS
console errors.

Reviewed-on: #1
Co-authored-by: Sulthan Zaki <sultankiki05@gmail.com>
Co-committed-by: Sulthan Zaki <sultankiki05@gmail.com>
2026-07-26 03:59:58 +07:00

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6.4 KiB
Markdown

# CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
## Status
Greenfield. Only `plans/mangaBookmark.md` exists — no code yet. That plan is the spec; read it before building. Two deliverables: a Go sync backend and a single Bromite-compatible userscript.
## What this is
A manga read-progress tracker for a user reading on **asurascans.com** (the current domain; asuracomic.net is the older one) and **demonicscans.org** from **Bromite** (mobile Chromium). A userscript injects on-page UI (floating button + slide-in panel) and syncs progress to a self-hosted Go backend so bookmarks unify across both sites and across devices.
## Hard constraints (these drive the design — do not violate)
Bromite uses Chromium's **native** userscript engine, not Tampermonkey:
- **No `GM_*` APIs anywhere.** No `GM_setValue`/`GM_getValue` (use page `localStorage`), no `GM_registerMenuCommand` (inject on-page UI), no `GM_xmlhttpRequest` for cross-origin (use plain `fetch()`). Keeping the script GM-free also lets it run in desktop Tampermonkey/Violentmonkey for faster iteration.
- Cross-origin `fetch()` works **only** against a CORS-enabled backend. Manga sites are `https://`, so backend **must be HTTPS** (mixed-content block otherwise).
- Asura and Demonic are **separate origins with separate `localStorage`** — a shared remote store is the only way to unify bookmarks. Cloud sync is required, not optional.
- Userscript runs in an **isolated world**, so the embedded API token is safe from the site's JS.
- Cloudflare blocks server-side fetch of the manga sites — **verify URL regex + `og:` selectors against live pages** (Playwright MCP or on-device devtools) before finalizing adapters, not by curling.
## Architecture
```
Bromite userscript (isolated world, per-site adapters, localStorage cache)
-- fetch() HTTPS --> reverse proxy (TLS + CORS) --> Go net/http --> SQLite (volume)
```
- **Backend** (`backend/`): stdlib `net/http` (a handful of routes, no framework) + `modernc.org/sqlite` (pure Go, `CGO_ENABLED=0` -> static binary -> distroless/scratch image). The reverse proxy terminates TLS; the Go service listens plain `:8080`.
- **Single-user store.** One `bookmarks` table keyed `<site>:<series_id>` (`asura`|`demonic`). Sync is **last-write-wins**. Schema and endpoint list are in the plan.
- **Endpoints:** `GET /bookmarks`, `PUT /bookmarks/{key}` (upsert; see `updated_at` rule below), `DELETE /bookmarks/{key}`, `GET /healthz` (no auth).
- **Web UI:** the same binary serves a password-gated browser UI on a second
hostname — `GET /` (list, or login page when there is no session),
`POST /login`, `POST /logout`, `GET /static/*`, and htmx fragment endpoints
under `/ui/*`. Templates and assets are `go:embed`-ed, so `backend/Dockerfile`
must copy `templates/` and `static/` as well as `*.go`. Sessions are stateless
HMAC cookies keyed off `API_TOKEN`; `WEB_PASSWORD` gates them and, when empty,
the web routes are not registered at all. UI mutations read-modify-write
through `Store.Get` + `Store.Upsert` so the `updated_at` rule stays in one
place. See `docs/superpowers/specs/2026-07-25-web-ui-design.md`.
- **`updated_at` drives list order, so it moves only on real reading progress:** the server applies its timestamp when the row is new or `last_chapter_num` changes, and otherwise keeps the stored value — favouriting a series or recording a newly published chapter must not reorder the list. `PUT` therefore returns the row **as stored**, and clients must adopt that response rather than their own payload. See `plans/2026-07-25-bookmark-list-favorites-design.md` §4.
- **Config via env:** `API_TOKEN`, `ALLOWED_ORIGINS` (comma list), `DB_PATH` (default `/data/bookmarks.db`), `PORT` (default `8080`), `WEB_PASSWORD` (gates the browser UI; unset disables it).
### Userscript structure (single IIFE, `manga-bookmark.user.js`)
1. **Site adapters** — one per host, `detect(location, document)` returns page `type` + IDs. Identify type/IDs from **URL regex** (most stable); pull `title`/`cover` from **`og:title`/`og:image` meta tags**, not CSS classes.
2. **API client** — `apiGet/apiPut/apiDelete` with bearer header; `localStorage` key `mangabm:cache` for instant render + offline fallback.
3. **Progress logic** — auto-upsert `last_chapter` only when `chapterNum >= stored last_chapter_num` (re-reading old chapters must not regress progress; unparseable -> set current). Manual panel override forces any value.
4. **UI** — rendered inside a **Shadow DOM** root to isolate from site CSS (critical on mobile).
5. **SPA navigation** — Asura is Next.js client-routed: patch `history.pushState`/`replaceState` + listen `popstate`, re-run `detect()` on URL change so auto-update fires without reload. Demonic uses classic reloads (initial `document-idle` run suffices).
## Commands (once code exists)
Backend (`cd backend`):
- Test all: `go test ./...`
- Single test: `go test -run TestName ./...`
- Build static binary: `CGO_ENABLED=0 go build`
Local stack: `docker compose up` (named volume mounted at `/data`, `restart: unless-stopped`).
Smoke test: `curl` the endpoints with `Authorization: Bearer <token>`; confirm `OPTIONS` preflight returns CORS headers and `/healthz` returns 200.
## Security invariants
- Auth on `/bookmarks*`: require `Authorization: Bearer <API_TOKEN>`, **constant-time compare**, 401 otherwise.
- CORS: reflect `Origin` only when in `ALLOWED_ORIGINS`; allow `GET,PUT,DELETE,OPTIONS` + headers `Authorization,Content-Type`; answer preflight `OPTIONS` with `204`.
## Relevant skills
`multi-stage-dockerfile` and `docker-compose-orchestration` for the container work (referenced in the plan).
## graphify
This project has a knowledge graph at graphify-out/ with god nodes, community structure, and cross-file relationships.
Rules:
- For codebase questions, first run `graphify query "<question>"` when graphify-out/graph.json exists. Use `graphify path "<A>" "<B>"` for relationships and `graphify explain "<concept>"` for focused concepts. These return a scoped subgraph, usually much smaller than GRAPH_REPORT.md or raw grep output.
- If graphify-out/wiki/index.md exists, use it for broad navigation instead of raw source browsing.
- Read graphify-out/GRAPH_REPORT.md only for broad architecture review or when query/path/explain do not surface enough context.
- After modifying code, run `graphify update .` to keep the graph current (AST-only, no API cost).