fix(import): map new clock options

apps/docs/docs/widgets/beszel-system-stats/index.mdx

@@ -15,7 +15,7 @@ import beszelSystemStats from "./img/beszel-system-stats.png";
 
 <WidgetHeader widget={beszelSystemStatsWidget} categories={["System Monitoring", "Charts"]} />
 
-This widget displays time-series charts for a selected Beszel system, including CPU, memory, disk, network, and Docker container metrics. The Disk Usage chart combines the root disk and every extra filesystem reported by Beszel. You can use the realtime Live view or select a historical period ranging from 1 hour to 30 days. If the live stream drops, the widget now shows the connection failure state immediately and can switch back to historical data.
+This widget displays time-series charts for a selected Beszel system, including CPU, memory, disk, network, and Docker container metrics. The Disk Usage chart combines the root disk and every extra filesystem reported by Beszel. You can use the realtime Live view or select a historical period ranging from 1 hour to 30 days. Live view keeps a one-minute window and pauses while the browser tab is hidden. If the live stream drops, the widget now shows the connection failure state immediately and can switch back to historical data.
 
 ### Screenshots
 

packages/api/src/router/widgets/__tests__/bounded-async-queue.spec.ts

@@ -0,0 +1,45 @@
+import { describe, expect, test } from "vitest";
+
+import { BoundedAsyncQueue } from "../bounded-async-queue";
+
+describe("BoundedAsyncQueue", () => {
+  test("keeps only the newest values when the queue is full", async () => {
+    const queue = new BoundedAsyncQueue<number>(2);
+    queue.push(1);
+    queue.push(2);
+    queue.push(3);
+    queue.close();
+
+    await expect(queue.next()).resolves.toEqual({ value: 2, done: false });
+    await expect(queue.next()).resolves.toEqual({ value: 3, done: false });
+    await expect(queue.next()).resolves.toEqual({ value: undefined, done: true });
+  });
+
+  test("resolves a pending read as soon as a value arrives", async () => {
+    const queue = new BoundedAsyncQueue<string>(1);
+    const next = queue.next();
+
+    queue.push("latest");
+
+    await expect(next).resolves.toEqual({ value: "latest", done: false });
+  });
+
+  test("resolves a pending read when the producer closes", async () => {
+    const queue = new BoundedAsyncQueue<number>(1);
+    const next = queue.next();
+
+    queue.close();
+
+    await expect(next).resolves.toEqual({ value: undefined, done: true });
+  });
+
+  test("rejects a pending read when the producer fails", async () => {
+    const queue = new BoundedAsyncQueue<number>(1);
+    const next = queue.next();
+    const error = new Error("upstream failed");
+
+    queue.fail(error);
+
+    await expect(next).rejects.toBe(error);
+  });
+});

packages/api/src/router/widgets/beszel.ts

@@ -1,5 +1,4 @@
 import { TRPCError } from "@trpc/server";
-import { observable } from "@trpc/server/observable";
 import { z } from "zod/v4";
 
 import { createLogger } from "@homarr/core/infrastructure/logs";
@@ -14,8 +13,10 @@ import {
 import { settleIntegrationQueries } from "../../settle-integrations";
 import { createManyIntegrationMiddleware } from "../../middlewares/integration";
 import { createTRPCRouter, publicProcedure } from "../../trpc";
+import { BoundedAsyncQueue } from "./bounded-async-queue";
 
 const logger = createLogger({ module: "beszelRouter" });
+const MAX_PENDING_LIVE_EVENTS = 4;
 
 const errorMessage = (error: unknown) => (error instanceof Error ? error.message : String(error));
 
@@ -203,98 +204,94 @@ export const beszelRouter = createTRPCRouter({
         systemId: z.string(),
       }),
     )
-    .subscription(({ ctx, input }) => {
-      return observable<LiveStatsEvent>((emit) => {
-        const controller = new AbortController();
-        let isActive = true;
-        let emittedEventCount = 0;
+    .subscription(async function* ({ ctx, input, signal }) {
+      const integration = ctx.integrations[0];
+      if (!integration) {
+        throw new TRPCError({ code: "BAD_REQUEST", message: "At least one Beszel integrationId is required" });
+      }
 
-        logger.debug("Beszel realtime subscription started", {
-          userId: ctx.session?.user?.id,
-          integrationIds: ctx.integrations.map((integration) => integration.id),
-          systemId: input.systemId,
-        });
+      const queue = new BoundedAsyncQueue<LiveStatsEvent>(MAX_PENDING_LIVE_EVENTS);
+      const controller = new AbortController();
+      let emittedEventCount = 0;
 
+      const stop = () => {
+        controller.abort();
+        void queue.return();
+      };
+      if (signal?.aborted) return;
+      signal?.addEventListener("abort", stop, { once: true });
+
+      logger.debug("Beszel realtime subscription started", {
+        userId: ctx.session?.user?.id,
+        integrationIds: ctx.integrations.map((candidate) => candidate.id),
+        systemId: input.systemId,
+      });
+
+      try {
+        const instance = await createIntegrationAsync(integration);
+        if (controller.signal.aborted) return;
         void (async () => {
-          const integration = ctx.integrations[0];
-          if (!integration) {
-            emit.error(
-              new TRPCError({ code: "BAD_REQUEST", message: "At least one Beszel integrationId is required" }),
-            );
-            return;
-          }
-
           try {
-            const instance = await createIntegrationAsync(integration);
-            if (typeof instance.subscribeRealtimeMetrics === "function") {
-              await instance.subscribeRealtimeMetrics(
-                input.systemId,
-                (event) => {
-                  if (!isActive) return;
-                  emittedEventCount += 1;
-                  if (emittedEventCount <= 2 || emittedEventCount % 60 === 0) {
-                    logger.debug("Forwarding Beszel realtime events", {
-                      userId: ctx.session?.user?.id,
-                      integrationId: integration.id,
-                      systemId: input.systemId,
-                      eventType: event.type,
-                      emittedEventCount,
-                      statsCount: Array.isArray(event.record.stats) ? event.record.stats.length : undefined,
-                    });
-                  }
-                  emit.next(event);
-                },
-                controller.signal,
-              );
-            } else {
-              emit.error(
-                new TRPCError({
-                  code: "METHOD_NOT_SUPPORTED",
-                  message: `Integration ${integration.kind} does not support realtime metrics`,
-                }),
-              );
-            }
-          } catch (error) {
-            if (isActive) {
-              logger.warn("Beszel realtime subscription failed", {
-                userId: ctx.session?.user?.id,
-                integrationId: integration.id,
-                systemId: input.systemId,
-                emittedEventCount,
-                error: errorMessage(error),
+            if (typeof instance.subscribeRealtimeMetrics !== "function") {
+              throw new TRPCError({
+                code: "METHOD_NOT_SUPPORTED",
+                message: `Integration ${integration.kind} does not support realtime metrics`,
               });
-              emit.error(
-                error instanceof TRPCError
-                  ? error
-                  : new TRPCError({
-                      code: "INTERNAL_SERVER_ERROR",
-                      message: error instanceof Error ? error.message : String(error),
-                    }),
-              );
             }
-          }
 
-          if (isActive) {
-            logger.debug("Beszel realtime subscription completed", {
+            await instance.subscribeRealtimeMetrics(
+              input.systemId,
+              (event) => {
+                emittedEventCount += 1;
+                if (emittedEventCount <= 2 || emittedEventCount % 60 === 0) {
+                  logger.debug("Forwarding Beszel realtime events", {
+                    userId: ctx.session?.user?.id,
+                    integrationId: integration.id,
+                    systemId: input.systemId,
+                    eventType: event.type,
+                    emittedEventCount,
+                    statsCount: Array.isArray(event.record.stats) ? event.record.stats.length : undefined,
+                  });
+                }
+                queue.push(event);
+              },
+              controller.signal,
+            );
+            queue.close();
+          } catch (error) {
+            if (controller.signal.aborted) {
+              queue.close();
+              return;
+            }
+
+            logger.warn("Beszel realtime subscription failed", {
               userId: ctx.session?.user?.id,
               integrationId: integration.id,
               systemId: input.systemId,
               emittedEventCount,
+              error: errorMessage(error),
             });
-            emit.complete();
+            queue.fail(
+              error instanceof TRPCError
+                ? error
+                : new TRPCError({
+                    code: "INTERNAL_SERVER_ERROR",
+                    message: error instanceof Error ? error.message : String(error),
+                  }),
+            );
           }
         })();
 
-        return () => {
-          isActive = false;
-          logger.debug("Beszel realtime subscription cancelled", {
-            userId: ctx.session?.user?.id,
-            integrationIds: ctx.integrations.map((integration) => integration.id),
-            systemId: input.systemId,
-            emittedEventCount,
-          });
-          controller.abort();
-        };
-      });
+        for await (const event of queue) yield event;
+      } finally {
+        stop();
+        signal?.removeEventListener("abort", stop);
+        logger.debug("Beszel realtime subscription stopped", {
+          userId: ctx.session?.user?.id,
+          integrationId: integration.id,
+          systemId: input.systemId,
+          emittedEventCount,
+        });
+      }
     }),
 });

packages/api/src/router/widgets/bounded-async-queue.ts

@@ -0,0 +1,88 @@
+type QueueResult<T> = IteratorResult<T, undefined>;
+
+type PendingRead<T> = {
+  resolve: (result: QueueResult<T>) => void;
+  reject: (reason?: unknown) => void;
+};
+
+/**
+ * A small async queue for live streams.
+ *
+ * Live metrics are snapshots, so retaining every snapshot while a client is
+ * slow is both unnecessary and dangerous. When the queue is full, discard
+ * the oldest pending snapshot and keep the newest one.
+ */
+export class BoundedAsyncQueue<T> implements AsyncIterableIterator<T> {
+  private readonly values: T[] = [];
+  private pendingRead: PendingRead<T> | undefined;
+  private closed = false;
+  private failed = false;
+  private failure: unknown;
+
+  public constructor(private readonly maxSize: number) {
+    if (!Number.isInteger(maxSize) || maxSize < 1) {
+      throw new Error("A bounded async queue requires a positive integer max size");
+    }
+  }
+
+  public push(value: T): void {
+    if (this.closed) return;
+
+    if (this.pendingRead) {
+      const pendingRead = this.pendingRead;
+      this.pendingRead = undefined;
+      pendingRead.resolve({ value, done: false });
+      return;
+    }
+
+    if (this.values.length >= this.maxSize) this.values.shift();
+    this.values.push(value);
+  }
+
+  public close(): void {
+    if (this.closed) return;
+    this.closed = true;
+
+    if (this.pendingRead) {
+      const pendingRead = this.pendingRead;
+      this.pendingRead = undefined;
+      pendingRead.resolve({ value: undefined, done: true });
+    }
+  }
+
+  public fail(error: unknown): void {
+    if (this.closed) return;
+    this.closed = true;
+    this.failed = true;
+    this.failure = error;
+    this.values.length = 0;
+
+    if (this.pendingRead) {
+      const pendingRead = this.pendingRead;
+      this.pendingRead = undefined;
+      pendingRead.reject(error);
+    }
+  }
+
+  public next(): Promise<QueueResult<T>> {
+    if (this.values.length > 0) {
+      return Promise.resolve({ value: this.values.shift() as T, done: false });
+    }
+    if (this.failed) return Promise.reject(this.failure);
+    if (this.closed) return Promise.resolve({ value: undefined, done: true });
+
+    return new Promise<QueueResult<T>>((resolve, reject) => {
+      this.pendingRead = { resolve, reject };
+    });
+  }
+
+  public return(): Promise<QueueResult<T>> {
+    this.values.length = 0;
+    this.close();
+    return Promise.resolve({ value: undefined, done: true });
+  }
+
+  public [Symbol.asyncIterator](): AsyncIterableIterator<T> {
+    return this;
+  }
+}

packages/core/src/infrastructure/http/request.ts

@@ -67,12 +67,14 @@ export const fetchWithTrustedCertificatesAsync = async (
   url: RequestInfo,
   options?: RequestInit & { timeout?: number; bodyTimeout?: number },
 ): Promise<Response> => {
-  const agent = await createCertificateAgentAsync(
-    undefined,
-    options?.bodyTimeout !== undefined ? { bodyTimeout: options.bodyTimeout } : undefined,
-  );
+  const agent =
+    options?.dispatcher ??
+    (await createCertificateAgentAsync(
+      undefined,
+      options?.bodyTimeout !== undefined ? { bodyTimeout: options.bodyTimeout } : undefined,
+    ));
   if (options?.timeout) {
-    const { bodyTimeout: _bodyTimeout, ...fetchOptions } = options;
+    const { bodyTimeout: _bodyTimeout, dispatcher: _dispatcher, ...fetchOptions } = options;
     return await withTimeoutAsync(
       async (signal) =>
         fetch(url, {
@@ -84,7 +86,7 @@ export const fetchWithTrustedCertificatesAsync = async (
     );
   }
 
-  const { bodyTimeout: _bodyTimeout, ...fetchOptions } = options ?? {};
+  const { bodyTimeout: _bodyTimeout, dispatcher: _dispatcher, ...fetchOptions } = options ?? {};
   return fetch(url, {
     ...fetchOptions,
     dispatcher: agent,

packages/integrations/src/beszel/beszel-integration.ts

@@ -1,6 +1,7 @@
 import { ResponseError } from "@homarr/common/server";
 import { createLogger } from "@homarr/core/infrastructure/logs";
-import { fetchWithTrustedCertificatesAsync } from "@homarr/core/infrastructure/http";
+import { createCertificateAgentAsync, fetchWithTrustedCertificatesAsync } from "@homarr/core/infrastructure/http";
+import type { Response as UndiciResponse } from "undici";
 
 import type { IntegrationInput, IntegrationTestingInput } from "../base/integration";
 import { Integration } from "../base/integration";
@@ -357,19 +358,41 @@ export class BeszelIntegration extends Integration {
     let emittedSnapshotCount = 0;
 
     while (!signal.aborted) {
+      let streamResponse: UndiciResponse | undefined;
+      let streamAgent: Awaited<ReturnType<typeof createCertificateAgentAsync>> | undefined;
+      const closeStreamAsync = async () => {
+        const response = streamResponse;
+        streamResponse = undefined;
+        const agent = streamAgent;
+        streamAgent = undefined;
+
+        if (response?.body) await response.body.cancel().catch(() => {});
+        if (agent) await agent.close().catch(() => {});
+      };
+
       try {
         let session = await this.authenticateAsync();
-        const openStream = async () =>
-          await fetchWithTrustedCertificatesAsync(realtimeUrl, {
-            headers: {
-              Accept: "text/event-stream",
-              Authorization: session.token,
-              "Cache-Control": "no-cache",
-              Pragma: "no-cache",
-            },
-            signal,
-            bodyTimeout: 0,
-          });
+        const openStream = async () => {
+          streamAgent = await createCertificateAgentAsync(undefined, { bodyTimeout: 0 });
+          try {
+            const response = await fetchWithTrustedCertificatesAsync(realtimeUrl, {
+              headers: {
+                Accept: "text/event-stream",
+                Authorization: session.token,
+                "Cache-Control": "no-cache",
+                Pragma: "no-cache",
+              },
+              signal,
+              bodyTimeout: 0,
+              dispatcher: streamAgent,
+            });
+            streamResponse = response;
+            return response;
+          } catch (error) {
+            await closeStreamAsync();
+            throw error;
+          }
+        };
 
         logger.debug("Opening Beszel rt_metrics SSE connection", {
           integrationId: this.integration.id,
@@ -378,6 +401,7 @@ export class BeszelIntegration extends Integration {
         });
         let response = await openStream();
         if (response.status === 401) {
+          await closeStreamAsync();
           await this.sessionStore.clearAsync();
           session = await this.authenticateAsync();
           response = await openStream();
@@ -402,14 +426,21 @@ export class BeszelIntegration extends Integration {
             clientId = frame.id || fallbackClientId;
             if (!clientId) throw new Error("PocketBase PB_CONNECT event did not include a client ID");
 
+            if (!streamAgent) throw new Error("Beszel realtime stream agent is not available");
             const subscribeResponse = await fetchWithTrustedCertificatesAsync(realtimeUrl, {
               method: "POST",
               headers: { Authorization: session.token, "Content-Type": "application/json" },
               body: JSON.stringify({ clientId, subscriptions: [topic] }),
               signal,
+              dispatcher: streamAgent,
             });
-            if (subscribeResponse.status === 401) await this.sessionStore.clearAsync();
-            if (!subscribeResponse.ok) throw new ResponseError(subscribeResponse);
+            try {
+              if (subscribeResponse.status === 401) await this.sessionStore.clearAsync();
+              if (!subscribeResponse.ok) throw new ResponseError(subscribeResponse);
+              await subscribeResponse.arrayBuffer();
+            } finally {
+              if (subscribeResponse.body) await subscribeResponse.body.cancel().catch(() => {});
+            }
             logger.debug("Subscribed to Beszel rt_metrics topic", {
               integrationId: this.integration.id,
               systemId,
@@ -461,10 +492,12 @@ export class BeszelIntegration extends Integration {
         } finally {
           await reader.cancel().catch(() => {});
           reader.releaseLock();
+          await closeStreamAsync();
         }
 
         if (!signal.aborted) throw new Error("Beszel rt_metrics SSE stream ended unexpectedly");
       } catch (error) {
+        await closeStreamAsync();
         if (signal.aborted) break;
         if (error instanceof ResponseError && error.statusCode === 401 && retryAttempt === 0) {
           retryAttempt += 1;

packages/integrations/src/beszel/test/beszel-integration.spec.ts

@@ -10,6 +10,7 @@ vi.hoisted(() => {
 const BESZEL_URL = process.env.BESZEL_TEST_URL ?? "http://localhost:8090";
 const BESZEL_EMAIL = process.env.BESZEL_TEST_EMAIL ?? "";
 const BESZEL_PASSWORD = process.env.BESZEL_TEST_PASSWORD ?? "";
+const closeAgent = vi.hoisted(() => vi.fn().mockResolvedValue(undefined));
 
 vi.mock("@homarr/redis", () => ({
   createGetSetChannel: () => ({
@@ -32,7 +33,7 @@ vi.mock("@homarr/core/infrastructure/logs", () => ({
 vi.mock("@homarr/core/infrastructure/http", () => ({
   fetchWithTrustedCertificatesAsync: (url: URL | string, init?: RequestInit) => fetch(url, init),
   createAxiosCertificateInstanceAsync: vi.fn().mockResolvedValue({}),
-  createCertificateAgentAsync: vi.fn().mockResolvedValue(undefined),
+  createCertificateAgentAsync: vi.fn().mockResolvedValue({ close: closeAgent }),
 }));
 
 vi.mock("@homarr/core/infrastructure/certificates", () => ({
@@ -153,6 +154,7 @@ describe("subscribeRealtimeMetrics", () => {
 
       expect(subscriptionBodies).toEqual([{ clientId: "client-1", subscriptions: [topic] }]);
       expect(events.map((event) => event.type)).toEqual(["system_stats", "container_stats"]);
+      expect(closeAgent).toHaveBeenCalled();
     } finally {
       globalThis.fetch = originalFetch;
     }

packages/old-import/src/widgets/options.ts

@@ -65,6 +65,9 @@ const optionMapping: OptionMapping = {
     useCustomTimezone: () => true,
     customTimeFormat: () => undefined,
     customDateFormat: () => undefined,
+    showWeather: () => undefined,
+    weatherLocation: () => undefined,
+    isWeatherFormatFahrenheit: () => undefined,
   },
   downloads: {
     activeTorrentThreshold: (oldOptions) =>

packages/widgets/src/beszel/_shared/use-live-stats.ts

@@ -1,6 +1,6 @@
 "use client";
 
-import { useCallback, useEffect, useRef, useState } from "react";
+import { useCallback, useEffect, useRef, useState, useSyncExternalStore } from "react";
 import { skipToken } from "@tanstack/react-query";
 
 import { clientApi } from "@homarr/api/client";
@@ -10,10 +10,22 @@ import type { BeszelContainerStatsRecord, BeszelSystemStatsRecord } from "@homar
 // without synthesizing points for missed updates.
 const MAX_BUFFER = 60;
 
+const subscribeToVisibility = (onChange: () => void) => {
+  if (typeof document === "undefined") return () => {};
+  document.addEventListener("visibilitychange", onChange);
+  return () => document.removeEventListener("visibilitychange", onChange);
+};
+
+const getPageVisibility = () => typeof document === "undefined" || document.visibilityState === "visible";
+
+const usePageVisible = () => useSyncExternalStore(subscribeToVisibility, getPageVisibility, () => true);
+
 export const useLiveStats = (integrationIds: string[], systemId: string, enabled: boolean) => {
   const [systemStats, setSystemStats] = useState<BeszelSystemStatsRecord[]>([]);
   const [containerStats, setContainerStats] = useState<BeszelContainerStatsRecord[]>([]);
   const [error, setError] = useState<Error | null>(null);
+  const pageVisible = usePageVisible();
+  const subscriptionEnabled = enabled && pageVisible && systemId !== "";
 
   // Append to buffer, trimming to MAX_BUFFER
   const appendSystemStats = useCallback((record: BeszelSystemStatsRecord) => {
@@ -31,7 +43,7 @@ export const useLiveStats = (integrationIds: string[], systemId: string, enabled
   }, []);
 
   clientApi.widget.beszel.subscribeSystemStats.useSubscription(
-    enabled && systemId !== "" ? { integrationIds, systemId } : skipToken,
+    subscriptionEnabled ? { integrationIds, systemId } : skipToken,
     {
       onData(event) {
         setError(null);
@@ -49,7 +61,7 @@ export const useLiveStats = (integrationIds: string[], systemId: string, enabled
 
   // Reset buffers when system changes or integration changes
   const prevKeyRef = useRef<string>("");
-  const currentKey = `${integrationIds.join(",")}:${systemId}:${enabled}`;
+  const currentKey = `${integrationIds.join(",")}:${systemId}:${subscriptionEnabled}`;
   useEffect(() => {
     if (prevKeyRef.current !== currentKey) {
       prevKeyRef.current = currentKey;