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import { ServerStartingError, SessionTokenError } from "./api";
import { MESSAGES } from "./locales/en";
import { SERVER_MODE } from "./types";
import type { ServerMode } from "./types";
/**
* Tag the modal's outer wrapper so the stylesheet keeps the close-X button
* consistently visible. Call from every lilbee modal so users never have to
* fall back to Escape to dismiss.
*/
export function tagModalChrome(modal: Modal): void {
modal.modalEl.addClass("lilbee-modal-chrome");
}
/**
* Bind Escape on the modal's own scope so dismissal works even when an inner
* input (search box, textarea) holds focus, plus apply the chrome tag so the
* close-X stays visible.
*/
export function bindEscapeToClose(modal: Modal): void {
modal.scope.register([], "Escape", () => {
modal.close();
return false;
});
tagModalChrome(modal);
}
export function debounce<T extends (...args: unknown[]) => unknown>(
fn: T,
ms: number,
): { run: (...args: Parameters<T>) => void; cancel: () => void } {
let timer: ReturnType<typeof setTimeout> | null = null;
return {
run: (...args: Parameters<T>) => {
if (timer) clearTimeout(timer);
timer = setTimeout(() => fn(...args), ms);
},
cancel: () => {
if (timer) {
clearTimeout(timer);
timer = null;
}
},
};
}
export const DEBOUNCE_MS = 300;
export const RETRY_INTERVAL_MS = 5000;
export const NOTICE_DURATION_MS = 3000;
export const NOTICE_ERROR_DURATION_MS = 8000;
export const NOTICE_PERMANENT = 0;
export const TIME_REFRESH_INTERVAL_MS = 30000;
export const HEALTH_PROBE_INTERVAL_MS = 30_000;
// Number of consecutive failed health probes required before flipping the
// status bar to error. One blip every 30s should not announce a problem.
export const HEALTH_FAILURE_STREAK_THRESHOLD = 2;
export const SPINNER_MIN_DISPLAY_MS = 800;
// 2 minutes without a single SSE event is long enough to mean "server is wedged" —
// legitimate OCR/embed pauses are shorter. Larger than this and users think the
// plugin hung; smaller and a slow page-OCR pass could trip it. Applies to sync /
// add / crawl streams; pull streams are excluded because long-download idleness
// is expected.
export const STREAM_IDLE_TIMEOUT_MS = 120_000;
export class StreamIdleError extends Error {
constructor(timeoutMs: number) {
super(`stream idle for ${Math.round(timeoutMs / 1000)}s`);
this.name = "StreamIdleError";
}
}
export async function* withIdleTimeout<T>(
gen: AsyncGenerator<T>,
timeoutMs: number,
abort: () => void,
): AsyncGenerator<T> {
const iter = gen[Symbol.asyncIterator]();
while (true) {
let timer: ReturnType<typeof setTimeout> | null = null;
const idle = new Promise<"idle">((resolve) => {
timer = setTimeout(() => resolve("idle"), timeoutMs);
});
const race = await Promise.race([iter.next(), idle]);
// Guard against vitest's fake-timer lifecycle leaving clearTimeout undefined
// across test-file boundaries; in production both are always defined.
if (timer !== null && typeof clearTimeout === "function") clearTimeout(timer);
if (race === "idle") {
abort();
// Fire-and-forget: iter.return() lets the source generator exit its
// try/finally blocks, but we don't await it — when the underlying
// fetch is aborted mid-read, the current iter.next() may hang, and
// awaiting return() would hang with it. abort() already propagates.
void iter.return?.(undefined);
throw new StreamIdleError(timeoutMs);
}
const { done, value } = race as IteratorResult<T>;
if (done) return;
yield value;
}
}
export function formatAbbreviatedCount(count: number): string {
if (count >= 1_000_000) return `${(count / 1_000_000).toFixed(1)}M`;
if (count >= 1_000) return `${(count / 1_000).toFixed(1)}K`;
return String(count);
}
export function ensureUrlScheme(url: string): string {
if (/^https?:\/\//i.test(url)) return url;
return `https://${url}`;
}
export function relativeTime(timestamp: number): string {
const seconds = Math.floor((Date.now() - timestamp) / 1000);
if (seconds < 60) return "just now";
const minutes = Math.floor(seconds / 60);
if (minutes < 60) return `${minutes}m ago`;
const hours = Math.floor(minutes / 60);
if (hours < 24) return `${hours}h ago`;
const days = Math.floor(hours / 24);
return `${days}d ago`;
}
/**
* Render the server's ISO-8601 timestamp ("2026-05-09T05:49:38.800771+00:00")
* as a human "5m ago" / "3d ago" string. Returns the raw value when parsing
* fails so callers never lose the data.
*/
export function relativeTimeFromIso(iso: string): string {
if (!iso) return "";
const t = Date.parse(iso);
if (Number.isNaN(t)) return iso;
return relativeTime(t);
}
const BYTE_UNITS = ["B", "KB", "MB", "GB", "TB"] as const;
export function formatBytes(bytes: number): string {
if (!Number.isFinite(bytes) || bytes < 0) return "0 B";
if (bytes < 1024) return `${bytes} B`;
let value = bytes;
let unit = 0;
while (value >= 1024 && unit < BYTE_UNITS.length - 1) {
value /= 1024;
unit++;
}
const rounded = value >= 100 ? value.toFixed(0) : value.toFixed(1);
return `${rounded} ${BYTE_UNITS[unit]}`;
}
export function formatRate(bytesPerSecond: number): string {
if (!Number.isFinite(bytesPerSecond) || bytesPerSecond <= 0) return "";
return `${formatBytes(bytesPerSecond)}/s`;
}
/** Pick the right session-token-invalid notice for the active server mode. */
export function sessionTokenInvalidMessage(serverMode: ServerMode): string {
return serverMode === SERVER_MODE.MANAGED
? MESSAGES.NOTICE_SESSION_TOKEN_INVALID_MANAGED
: MESSAGES.NOTICE_SESSION_TOKEN_INVALID;
}
/**
* Pull a human-readable message out of an unknown thrown value.
* Centralizes the `err instanceof Error ? err.message : <fallback>` pattern.
* Stale-session-token errors get a dedicated, actionable message so the user
* knows exactly where to fix it (see SessionTokenError in api.ts).
*/
export function errorMessage(err: unknown, fallback: string, serverMode?: ServerMode): string {
if (err instanceof SessionTokenError) {
return sessionTokenInvalidMessage(serverMode ?? SERVER_MODE.EXTERNAL);
}
return err instanceof Error ? err.message : fallback;
}
/**
* Returns the most actionable message available for a Result error, falling back to the
* supplied generic text. Priority:
* 1. SessionTokenError → the stale-token notice (recovery action: paste a fresh token).
* 2. Role-mismatch 422 → the server's `detail` string verbatim (tells the user which
* endpoint to use instead — see `isRoleMismatchDetail`).
* 3. Everything else → the operation-specific fallback.
*
* Use at `.isErr()` call sites. Centralizing role-mismatch detection here means every
* caller (Settings panels, CatalogModal, …) surfaces the same actionable diagnostic
* without duplicating the parse logic.
*/
export function noticeForResultError(err: unknown, fallback: string, serverMode?: ServerMode): string {
if (err instanceof SessionTokenError) {
return sessionTokenInvalidMessage(serverMode ?? SERVER_MODE.EXTERNAL);
}
if (err instanceof Error) {
const detail = extractServerErrorDetail(err.message);
if (detail !== null && isRoleMismatchDetail(detail)) {
return detail;
}
}
return fallback;
}
/**
* Pull a human-readable error message out of an SSE `error` event payload.
* Server may send either a raw string or `{message: string}`. Falls back to
* the given `unknownFallback` if neither shape matches. Centralizes the
* `typeof d === "string" ? d : (d.message ?? "unknown error")` pattern.
*/
export function extractSseErrorMessage(data: unknown, unknownFallback: string): string {
if (typeof data === "string") return data;
if (data && typeof data === "object" && "message" in data) {
const msg = (data as { message?: unknown }).message;
if (typeof msg === "string") return msg;
}
return unknownFallback;
}
/**
* Extract the server's `detail` string from a `Server responded <status>: <body>`
* error message when the body is JSON of shape `{"detail": "..."}`. Returns null
* when the error is not in this shape, the body is not JSON, or `detail` is not
* a string. Used to surface server-authored role-mismatch diagnostics verbatim.
*/
export function extractServerErrorDetail(message: string): string | null {
const colonIdx = message.indexOf(":");
if (colonIdx === -1) return null;
const body = message.slice(colonIdx + 1).trim();
if (!body) return null;
try {
const parsed = JSON.parse(body) as unknown;
if (parsed && typeof parsed === "object" && "detail" in parsed) {
const detail = (parsed as { detail?: unknown }).detail;
if (typeof detail === "string") return detail;
}
} catch {
return null;
}
return null;
}
/**
* Distinguishes the role-mismatch 422 (e.g. setting a vision model as chat) from an
* auth-shaped 422 by the `Set it via PUT /api/models/` remedy phrase. The full prefix
* keeps unrelated 422s that just happen to mention the endpoint from being misclassified.
*/
export function isRoleMismatchDetail(detail: string): boolean {
return detail.includes("Set it via PUT /api/models/");
}
/**
* Compute a percent (0–100) from a server SSE progress payload.
* Accepts `{percent, current, total}` shape and prefers `percent` if present;
* otherwise derives from `current/total`. Returns undefined when neither is usable
* (e.g. total is zero/missing, or current is missing).
*/
export function percentFromSse(data: { percent?: number; current?: number; total?: number }): number | undefined {
if (data.percent !== undefined) return data.percent;
if (data.total && data.current !== undefined) {
return Math.round((data.current / data.total) * 100);
}
return undefined;
}
export function formatElapsed(ms: number): string {
if (!Number.isFinite(ms) || ms < 0) return "00:00";
const totalSeconds = Math.floor(ms / 1000);
const hours = Math.floor(totalSeconds / 3600);
const minutes = Math.floor((totalSeconds % 3600) / 60);
const seconds = totalSeconds % 60;
const mm = String(minutes).padStart(2, "0");
const ss = String(seconds).padStart(2, "0");
if (hours > 0) {
return `${hours}:${mm}:${ss}`;
}
return `${mm}:${ss}`;
}
/** Total system RAM in GB, rounded; null when ``os`` is unavailable. */
export function getSystemMemoryGB(): number | null {
try {
// eslint-disable-next-line @typescript-eslint/no-require-imports
const os = require("os") as { totalmem(): number };
return Math.round(os.totalmem() / (1024 * 1024 * 1024));
/* v8 ignore next 3 */
} catch {
return null;
}
}
/**
* The local machine's RAM only constrains model loads in managed mode where
* the server runs on this machine. In external mode the server lives on
* another host whose RAM we don't know — return null and skip the warning.
*/
export function getRelevantSystemMemoryGB(serverMode: ServerMode): number | null {
if (serverMode !== SERVER_MODE.MANAGED) return null;
return getSystemMemoryGB();
}
const SERVER_UNREACHABLE_DEBOUNCE_MS = 5000;
let lastServerUnreachableAt = 0;
/** Reset the debounce timer (test-only). */
export function _resetServerUnreachableDebounce(): void {
lastServerUnreachableAt = 0;
}
function looksLikeConnectionRefused(err: Error): boolean {
const msg = err.message.toLowerCase();
return msg.includes("econnrefused") || msg.includes("failed to fetch") || msg.includes("fetch failed");
}
/**
* Inspect a thrown error and emit at most one "server unreachable" notice per
* debounce window, swallowing the per-feature message in that case. Returns
* ``true`` when the error was handled and the caller should skip its own
* follow-up notice. ``ServerStartingError`` is treated as unreachable too —
* the user can already see the "starting" UI elsewhere.
*/
export function noticeServerUnreachableIfApplicable(err: unknown): boolean {
if (err instanceof ServerStartingError) return true;
if (!(err instanceof Error)) return false;
if (!looksLikeConnectionRefused(err)) return false;
const now = Date.now();
if (now - lastServerUnreachableAt > SERVER_UNREACHABLE_DEBOUNCE_MS) {
lastServerUnreachableAt = now;
new Notice(MESSAGES.NOTICE_SERVER_UNREACHABLE);
}
return true;
}
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