Ilia Denisov
ef61b778fc
Connectivity failures become state, not a toast on every attempt. A global online signal (lib/connection.svelte.ts) flips on a transport unavailable / rate_limited and on the live stream's drop, driving a pure-CSS header spinner + 'Connecting…' in place of the title and softly disabling the in-game server actions (commit / exchange / pass / hint; local board/rack/reset stay live). - transport: exec auto-retries with capped exponential backoff — every op on a rate-limit (rejected before processing, safe), reads only on unavailable (a mutation is never blindly re-sent, to avoid double-applying one whose response was lost; its button is disabled while offline so the player re-issues on reconnect). A reachability watcher (profile.get probe) and any successful traffic clear the signal. - the old red error.unavailable toast is gone (handleError suppresses connection codes; the indicator replaces it). A server-data screen still opens with the spinner and fills on reconnect (global indicator + read auto-retry), so navigation is never dead. - pure retry policy unit-tested (retry.ts); a mock-only window.__conn hook drives a Chromium+WebKit e2e (indicator shows offline, the action disables, both clear on reconnect). Full suite + build green. - docs: ARCHITECTURE transport note, FUNCTIONAL (+ _ru), PLAN tracker (incl. #1 — the bot already drains all updates, no change). Also records #1 as investigated/no-change in PLAN. Other server-action buttons (chat send, profile save, …) still degrade to a safe no-op offline; visual disable is easy to extend.
scrabble-ui
Pure-HTML5 game client — plain Svelte 5 (runes) + TypeScript + Vite, no
SvelteKit. Talks to the gateway over Connect-RPC + FlatBuffers; embeddable in
platform webviews and packageable to native via Capacitor.
Stage 7 ships the playable slice: sign in (guest / email), the "my games" lobby, auto-match, the board (place tiles by drag or tap, pass, exchange, resign), hint, word-check + complaint, per-game chat and nudge, the live in-app stream, i18n (en/ru), theme, and the profile. Stage 8 adds friends/blocks (with one-time friend codes), friend-game invitations, profile editing + email binding, the statistics screen, the lobby notification badge, and the in-game history + GCG export (share or download, finished games only).
Scripts
pnpm install
pnpm start # mock mode (VITE_MOCK): lobby -> game with no backend, :5173
pnpm dev # against a running gateway (Vite proxies /scrabble.edge.v1.Gateway -> :8081)
pnpm check # svelte-check / tsc
pnpm test:unit # Vitest (pure logic + FlatBuffers codec)
pnpm test:e2e # Playwright smoke against the mock
pnpm build # static bundle into dist/ (prod ~67 KB gzip JS)
pnpm codegen # regenerate src/gen from edge.proto + scrabble.fbs (dev-time)
GATEWAY_URL overrides the dev proxy target; VITE_GATEWAY_URL sets the runtime
gateway origin for a packaged (non-proxied) build. VITE_TELEGRAM_BOT_ID (Stage 11)
enables the "Link Telegram" web sign-in (the Login Widget) — inert until the site
domain is registered with BotFather (/setdomain); VITE_TELEGRAM_LINK is the
share-to-Telegram deep-link base (Stage 9). VITE_TELEGRAM_GAME_CHANNEL_NAME_EN / VITE_TELEGRAM_GAME_CHANNEL_NAME_RU
are the per-language "Play in Telegram" links shown on the landing page (Stage 17).
The build has two entries: the game SPA (index.html, served at /app/ and
/telegram/) and a lightweight landing page (landing.html, served at /).
How it talks to the gateway
A single Connect Execute(message_type, payload) carries every unary op; the request
and response bodies are FlatBuffers tables (pkg/fbs/scrabble.fbs) in payload.
The session token rides in Authorization: Bearer; a domain failure comes back in
result_code. Subscribe is the live event stream. lib/transport.ts is the real
client; lib/mock/ is an in-memory fake selected by MODE === 'mock' (and tree-shaken
out of production). Both speak the plain lib/model.ts types via lib/codec.ts.
No board on the wire: StateView is a summary + rack only, so the client
reconstructs the 15×15 board by replaying the decoded move journal (game.history).
The play loop is alphabet-agnostic (Stage 13): the rack and the play / exchange /
word-check requests carry alphabet indices, and the client caches each variant's
(index, letter, value) table — sent once behind StateRequest.include_alphabet — in
lib/alphabet.ts, rendering the rack and blank chooser from it. Premium squares
(lib/premiums.ts) stay a client-side geometry map ported from
scrabble-solver/rules/rules.go (pinned by a Vitest parity test); tile values and the
alphabet now come from the server table (their parity lives in the Go engine.AlphabetTable
test). Board, tiles and effects are pure CSS + Unicode — no image/font/SVG assets.
Codegen
src/gen/ is committed; CI builds it, it is not regenerated there (the same model
as the Go committed jet/fbs output). pnpm codegen runs flatc --ts on
../pkg/fbs/scrabble.fbs and buf generate (protoc-gen-es) on the edge proto. Needs
flatc 23.5.26 and buf on PATH.
Theming
Design tokens are CSS custom properties (src/app.css); light/dark follows
prefers-color-scheme or an explicit choice in Settings. The token system is
Telegram-themeParams-ready (lib/theme.ts) — a Mini App can override the tokens at
runtime; the Telegram SDK itself is wired in the Telegram stage.
Layout
src/
lib/ model, client facade, transport (+ mock), codec, board replay,
placement state machine, premiums (geometry), alphabet cache, stats, share,
i18n, theme, session, router, app store
components/ Header, Menu (+ badge), Modal, Toast, TabBar, Screen
screens/ Login, Lobby, NewGame, Profile, Settings, About, Friends, Stats
game/ Game, Board, Rack, Controls, MakeMove, Chat
gen/ committed edge codegen (FlatBuffers + Connect)
e2e/ Playwright smoke + social specs (mock)