peter
49f8c57c89
First step of splitting the api.ts god module behind its façade. Move req, HttpError, localizeDetail, the connectivity toast, ReqConfig, the per-tab active-account plumbing (getActiveAccount/setActiveAccount/clearActiveAccount/ beacon), setupHeaders, and setUnauthorizedHandler into lib/api/core.ts. api.ts imports the machinery it uses and re-exports the public surface, so the 53 call sites importing from "./api" are unchanged. api.ts 1793 -> 1583 lines; no runtime change (pure move). Gate green: typecheck, eslint, prettier, 74 vitest.
233 lines
10 KiB
TypeScript
233 lines
10 KiB
TypeScript
// The shared HTTP machinery behind every api.* domain module: the fetch wrapper (`req`), the typed
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// error, structured-error localization, the connectivity toast, the per-tab active-account plumbing,
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// and the keepalive beacon. Domain modules import from here; nothing here imports a domain module,
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// so the runtime graph is a clean barrel → domain → core with no cycles.
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import { notify, remove } from "../notifications";
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import i18n from "../../i18n";
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import { reportError } from "../errorDialog";
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import { activeAccountId, ACTIVE_ACCOUNT_KEY } from "../storage";
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export class HttpError extends Error {
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status: number;
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detail?: string; // server-provided reason (FastAPI's `detail`), when present
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detailData?: unknown; // structured detail ({ code, reason, ... }) when the server sent an object
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constructor(status: number, detail?: string, detailData?: unknown) {
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super(detail || `HTTP ${status}`);
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this.status = status;
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this.detail = detail;
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this.detailData = detailData;
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}
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}
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// Localize a STRUCTURED server error ({ code, reason, ... }) into the user's language. FastAPI
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// usually returns a plain string `detail`, but some routes (e.g. download quota/edit) return a
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// structured object with an i18n reason key + numbers so HU/DE users don't get hardcoded English
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// with a dot-decimal separator. Falls back to a generic message for unknown shapes.
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function localizeDetail(d: unknown): string {
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const t = i18n.t.bind(i18n);
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// FastAPI request-validation errors: `detail` is an ARRAY of { loc, msg, type }. The UI sends
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// well-formed requests, so this only fires on genuinely malformed input. The per-field `msg` and
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// `loc` field names are English, snake_case internal tokens — surface a clean, fully localized
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// "check your input" message rather than leaking them into a translated sentence.
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if (Array.isArray(d)) return t("errors.validation");
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const o = d as { code?: string; reason?: string; limit?: number } | null | undefined;
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if (o?.code === "quota") {
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if (o.reason === "max_bytes") {
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const gb = new Intl.NumberFormat(i18n.language, { maximumFractionDigits: 1 }).format(
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(o.limit || 0) / 1_073_741_824,
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);
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return t("downloads.errors.quota.max_bytes", { size: gb });
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}
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if (o.reason === "max_jobs") return t("downloads.errors.quota.max_jobs", { limit: o.limit });
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return t("downloads.errors.quota.generic");
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}
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if (o?.code === "edit")
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return t(`downloads.errors.edit.${o.reason}`, t("downloads.errors.edit.generic"));
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return t("errors.generic");
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}
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// A single, self-resolving "connection lost" status: while the server is unreachable we
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// show one sticky, transient (non-persisted) notice; the moment any request reaches the
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// server again we remove it. This makes good on its "clears once it's back" copy and keeps
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// bursts of concurrent failures from stacking up — there's only ever one live handle.
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let connectivityNotifId: number | null = null;
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function markConnectivityLost(): void {
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if (connectivityNotifId !== null) return;
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connectivityNotifId = notify({
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level: "error",
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title: i18n.t("errors.offline.title"),
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message: i18n.t("errors.offline.body"),
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transient: true,
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});
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}
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function markConnectivityRestored(): void {
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if (connectivityNotifId === null) return;
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remove(connectivityNotifId);
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connectivityNotifId = null;
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}
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// Gateway statuses that mean "the upstream connection failed", not "the app rejected the
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// request" — typically a reverse-proxy ↔ uvicorn keepalive connection reset before the
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// request was processed. Safe to retry an idempotent call once on a fresh connection.
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const RETRIABLE_GATEWAY = new Set([502, 503, 504]);
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const delay = (ms: number) => new Promise((res) => window.setTimeout(res, ms));
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// `idempotent`: may this request be replayed after a transient gateway/network failure?
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// GETs always can; non-GET callers opt in (e.g. the player's progress/state writes, which
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// are safe to repeat). Used to recover from the keepalive race without surfacing a 502.
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export interface ReqConfig {
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idempotent?: boolean;
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// Suppress the global error modal for 4xx/5xx so the caller can show the error inline
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// (used by the auth forms — a wrong password shouldn't pop a blocking dialog).
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quiet?: boolean;
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}
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// Set by the app shell. Invoked whenever any request returns 401 so a session that ended
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// server-side (account suspended/deleted while the tab was open) can drop the user to the login
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// page. The handler itself guards against firing when we were never signed in, so it's safe to
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// call for every 401. (The bootstrap /api/me probe no longer 401s — it returns 200 with a null
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// user when logged out — but other protected endpoints still do.)
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let onUnauthorized: (() => void) | null = null;
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export function setUnauthorizedHandler(fn: (() => void) | null): void {
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onUnauthorized = fn;
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}
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// Headers for install-wizard calls: the one-time setup token plus the JSON content type (req
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// replaces — not merges — its default headers when opts.headers is given, so include both).
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export const setupHeaders = (token: string) => ({
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"Content-Type": "application/json",
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"X-Setup-Token": token,
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});
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// --- Per-tab active account --------------------------------------------------------------
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// The signed session cookie is the browser's account "wallet"; which account a given TAB acts
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// as is chosen here and sent per-request, so two tabs can run two accounts at once. Stored in
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// sessionStorage (per-tab, survives F5, not shared across tabs). null = use the session default.
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// The storage key + reader live in storage.ts (so its per-account helpers can use them too).
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const ACTIVE_ACCOUNT_HEADER = "X-Siftlode-Account";
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export const getActiveAccount = activeAccountId;
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// Fire-and-forget POST that survives page unload (keepalive) — shared by the resume-position
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// beacons (YT + Plex players). A normal fetch is cancelled on unload and React effect cleanup
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// doesn't run on a full reload, so without keepalive the last position (esp. right after a seek)
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// would be lost.
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export function beacon(url: string, body: Record<string, unknown>): void {
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const active = getActiveAccount();
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try {
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void fetch(url, {
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method: "POST",
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keepalive: true,
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credentials: "include",
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headers: {
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"Content-Type": "application/json",
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...(active != null ? { [ACTIVE_ACCOUNT_HEADER]: String(active) } : {}),
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},
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body: JSON.stringify(body),
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}).catch(() => {});
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} catch {
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/* ignore */
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}
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}
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export function setActiveAccount(id: number): void {
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try {
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sessionStorage.setItem(ACTIVE_ACCOUNT_KEY, String(id));
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} catch {
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/* ignore */
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}
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}
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export function clearActiveAccount(): void {
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try {
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sessionStorage.removeItem(ACTIVE_ACCOUNT_KEY);
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} catch {
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/* ignore */
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}
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}
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export async function req<T = unknown>(
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url: string,
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opts: RequestInit = {},
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cfg: ReqConfig = {},
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): Promise<T> {
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const method = opts.method ?? "GET";
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const canRetry = cfg.idempotent ?? method === "GET";
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let attempt = 0;
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for (;;) {
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let r: Response;
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try {
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const active = getActiveAccount();
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r = await fetch(url, {
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credentials: "include",
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headers: {
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"Content-Type": "application/json",
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// Per-tab identity override (only setup calls pass their own headers, and those are
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// pre-auth, so this is safe to put in the defaults that `...opts` may replace).
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...(active != null ? { [ACTIVE_ACCOUNT_HEADER]: String(active) } : {}),
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},
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...opts,
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});
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} catch (e) {
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// Network-level failure (incl. a keepalive connection reset surfacing as a TypeError).
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if (canRetry && attempt === 0) {
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attempt++;
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await delay(250);
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continue;
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}
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markConnectivityLost();
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throw e;
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}
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// A gateway error usually means the upstream connection was reset before our request
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// was processed — retry idempotent calls once on a fresh connection before surfacing it.
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if (!r.ok && canRetry && attempt === 0 && RETRIABLE_GATEWAY.has(r.status)) {
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attempt++;
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await delay(250);
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continue;
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}
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// The server answered (anything that isn't a gateway error means it's reachable) —
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// clear a standing "connection lost" status if one is showing.
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if (!RETRIABLE_GATEWAY.has(r.status)) markConnectivityRestored();
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if (!r.ok) {
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// Capture the server's reason (FastAPI returns `{ detail }`) so callers can react.
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let detail: string | undefined;
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let detailData: unknown;
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try {
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const body = await r.json();
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if (body && typeof body.detail === "string") detail = body.detail;
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else if (body && body.detail && typeof body.detail === "object") {
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detailData = body.detail;
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detail = localizeDetail(body.detail); // structured error → localized message
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}
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} catch {
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/* no JSON body */
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}
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// 502/503/504 mean the gateway couldn't reach the app (restarting / connection reset),
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// not a request the app refused — treat them like a network blip with the soft,
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// self-clearing toast rather than a blocking modal the user must acknowledge.
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// A genuine 500 (real fault, carries a JSON detail) still gets the modal, as do
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// 400/409/422 (validation/conflict). 401/403/404 are caller-handled control flow.
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if (RETRIABLE_GATEWAY.has(r.status)) {
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markConnectivityLost();
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} else if (r.status === 401) {
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// Session ended server-side (e.g. the account was suspended or deleted mid-visit). Let the
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// app shell decide what to do (drop to the login page if we were signed in). Not a modal.
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onUnauthorized?.();
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} else if (cfg.quiet) {
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/* caller handles the error inline — no global modal */
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} else if (r.status >= 500) {
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reportError(detail || `${i18n.t("errors.server")} (${r.status})`);
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} else if (r.status === 400 || r.status === 409 || r.status === 422) {
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reportError(detail);
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}
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throw new HttpError(r.status, detail, detailData);
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}
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// The single audited cast in this layer: the server contract is asserted here, once, so
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// every typed api.* method (T comes from its declared return type) is checked from here up.
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return (r.status === 204 ? null : await r.json()) as T;
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}
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}
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