feat(web): add queue notification feed

apps/web/src/components/mission-control/QueueNotificationFeed.tsx

@@ -0,0 +1,332 @@
+"use client";
+
+import { useCallback, useEffect, useMemo, useState } from "react";
+import { formatDistanceToNow } from "date-fns";
+import { BellOff, ChevronLeft, ChevronRight, Loader2 } from "lucide-react";
+import { useToast } from "@mosaic/ui";
+import { Badge } from "@/components/ui/badge";
+import { Button } from "@/components/ui/button";
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
+import { Collapsible } from "@/components/ui/collapsible";
+import { ScrollArea } from "@/components/ui/scroll-area";
+import { Skeleton } from "@/components/ui/skeleton";
+import { apiGet, apiPost } from "@/lib/api/client";
+
+export interface QueueNotificationFeedProps {
+  className?: string;
+}
+
+interface QueueNotification {
+  id: string;
+  agent: string;
+  filename: string;
+  payload: unknown;
+  createdAt: string;
+}
+
+interface QueuePayloadRecord {
+  taskId?: unknown;
+  type?: unknown;
+  eventType?: unknown;
+  event?: unknown;
+}
+
+interface NotificationGroup {
+  agent: string;
+  notifications: QueueNotification[];
+}
+
+const NOTIFICATIONS_ENDPOINT = "/api/orchestrator/api/queue/notifications";
+const NOTIFICATIONS_STREAM_ENDPOINT = "/api/orchestrator/queue/notifications/stream";
+
+function joinClasses(...classes: (string | undefined)[]): string {
+  return classes.filter((value) => typeof value === "string" && value.length > 0).join(" ");
+}
+
+function asPayloadRecord(payload: unknown): QueuePayloadRecord | null {
+  if (payload === null || typeof payload !== "object" || Array.isArray(payload)) {
+    return null;
+  }
+
+  return payload as QueuePayloadRecord;
+}
+
+function getNotificationTaskId(notification: QueueNotification): string {
+  const payload = asPayloadRecord(notification.payload);
+  return typeof payload?.taskId === "string" && payload.taskId.trim().length > 0
+    ? payload.taskId
+    : notification.id;
+}
+
+function getNotificationEventType(notification: QueueNotification): string {
+  const payload = asPayloadRecord(notification.payload);
+  const candidates = [payload?.eventType, payload?.type, payload?.event];
+
+  for (const candidate of candidates) {
+    if (typeof candidate === "string" && candidate.trim().length > 0) {
+      return candidate;
+    }
+  }
+
+  return "notification";
+}
+
+function formatNotificationAge(createdAt: string): string {
+  const parsedDate = new Date(createdAt);
+  if (Number.isNaN(parsedDate.getTime())) {
+    return "just now";
+  }
+
+  return formatDistanceToNow(parsedDate, { addSuffix: true });
+}
+
+function groupNotificationsByAgent(notifications: QueueNotification[]): NotificationGroup[] {
+  const grouped = new Map<string, QueueNotification[]>();
+
+  for (const notification of notifications) {
+    const current = grouped.get(notification.agent) ?? [];
+    current.push(notification);
+    grouped.set(notification.agent, current);
+  }
+
+  return Array.from(grouped.entries())
+    .sort(([leftAgent], [rightAgent]) => leftAgent.localeCompare(rightAgent))
+    .map(([agent, items]) => ({
+      agent,
+      notifications: [...items].sort(
+        (left, right) => new Date(right.createdAt).getTime() - new Date(left.createdAt).getTime()
+      ),
+    }));
+}
+
+export function QueueNotificationFeed({
+  className,
+}: QueueNotificationFeedProps): React.JSX.Element {
+  const { showToast } = useToast();
+  const [notifications, setNotifications] = useState<QueueNotification[]>([]);
+  const [isLoading, setIsLoading] = useState(true);
+  const [errorMessage, setErrorMessage] = useState<string | null>(null);
+  const [acknowledgingIds, setAcknowledgingIds] = useState<Record<string, boolean>>({});
+  const [isCollapsed, setIsCollapsed] = useState(false);
+  const [now, setNow] = useState(Date.now());
+
+  const refreshNotifications = useCallback(async (): Promise<void> => {
+    try {
+      const payload = await apiGet<QueueNotification[]>(NOTIFICATIONS_ENDPOINT);
+      setNotifications(payload);
+      setErrorMessage(null);
+    } catch (error) {
+      const message =
+        error instanceof Error && error.message.trim().length > 0
+          ? error.message
+          : "Failed to load queue notifications.";
+      setErrorMessage(message);
+    } finally {
+      setIsLoading(false);
+    }
+  }, []);
+
+  useEffect(() => {
+    void refreshNotifications();
+  }, [refreshNotifications]);
+
+  useEffect(() => {
+    if (typeof EventSource === "undefined") {
+      return undefined;
+    }
+
+    const source = new EventSource(NOTIFICATIONS_STREAM_ENDPOINT);
+
+    source.onmessage = (event: MessageEvent<string>): void => {
+      try {
+        const payload = JSON.parse(event.data) as QueueNotification[];
+        setNotifications(payload);
+        setErrorMessage(null);
+        setIsLoading(false);
+      } catch {
+        setErrorMessage("Received an invalid notification stream payload.");
+      }
+    };
+
+    source.onerror = (): void => {
+      setErrorMessage((current) => current ?? "Queue notification stream disconnected.");
+    };
+
+    return (): void => {
+      source.close();
+    };
+  }, []);
+
+  useEffect(() => {
+    const intervalId = window.setInterval(() => {
+      setNow(Date.now());
+    }, 60_000);
+
+    return (): void => {
+      window.clearInterval(intervalId);
+    };
+  }, []);
+
+  const groupedNotifications = useMemo(
+    () => groupNotificationsByAgent(notifications),
+    [notifications]
+  );
+
+  const pendingCount = notifications.length;
+
+  const handleAck = useCallback(
+    async (notificationId: string): Promise<void> => {
+      setAcknowledgingIds((current) => ({
+        ...current,
+        [notificationId]: true,
+      }));
+
+      try {
+        await apiPost<{ success: true; id: string }>(
+          `/api/orchestrator/api/queue/notifications/${encodeURIComponent(notificationId)}/ack`
+        );
+        setNotifications((current) => current.filter((item) => item.id !== notificationId));
+      } catch (error) {
+        const message =
+          error instanceof Error && error.message.trim().length > 0
+            ? error.message
+            : "Failed to acknowledge notification.";
+        showToast(message, "error");
+      } finally {
+        setAcknowledgingIds((current) => {
+          const { [notificationId]: _omitted, ...remaining } = current;
+          return remaining;
+        });
+      }
+    },
+    [showToast]
+  );
+
+  return (
+    <Card className={joinClasses("flex h-full min-h-0 flex-col", className)}>
+      <CardHeader className="pb-2">
+        <div className="flex items-start justify-between gap-2">
+          <div className="flex min-w-0 items-center gap-2">
+            <CardTitle className="text-base">Queue Notifications</CardTitle>
+            <Badge variant={pendingCount > 0 ? "status-info" : "secondary"}>{pendingCount}</Badge>
+          </div>
+          <Button
+            type="button"
+            variant="ghost"
+            size="icon"
+            className="h-7 w-7"
+            onClick={() => {
+              setIsCollapsed((current) => !current);
+            }}
+            aria-label={isCollapsed ? "Expand queue notifications" : "Collapse queue notifications"}
+            title={isCollapsed ? "Expand queue notifications" : "Collapse queue notifications"}
+          >
+            {isCollapsed ? (
+              <ChevronLeft className="h-4 w-4" aria-hidden="true" />
+            ) : (
+              <ChevronRight className="h-4 w-4" aria-hidden="true" />
+            )}
+          </Button>
+        </div>
+      </CardHeader>
+      <Collapsible open={!isCollapsed} className="min-h-0 flex-1">
+        {!isCollapsed ? (
+          <CardContent className="min-h-0 flex-1 px-3 pb-3">
+            {isLoading ? (
+              <ScrollArea className="h-full">
+                <div className="space-y-2 pr-1">
+                  {Array.from({ length: 6 }).map((_, index) => (
+                    <Skeleton
+                      key={`queue-notification-skeleton-${String(index)}`}
+                      className="h-14 w-full"
+                    />
+                  ))}
+                </div>
+              </ScrollArea>
+            ) : errorMessage && notifications.length === 0 ? (
+              <div className="flex h-full items-center justify-center px-4 text-center text-sm text-red-500">
+                {errorMessage}
+              </div>
+            ) : groupedNotifications.length === 0 ? (
+              <div className="flex h-full flex-col items-center justify-center gap-2 text-center text-sm text-muted-foreground">
+                <BellOff className="h-5 w-5" aria-hidden="true" />
+                <span>No pending notifications</span>
+              </div>
+            ) : (
+              <ScrollArea className="h-full">
+                <div className="space-y-4 pr-1">
+                  {groupedNotifications.map((group) => (
+                    <section key={group.agent} className="space-y-2">
+                      <div className="flex items-center justify-between gap-2">
+                        <h3 className="text-sm font-semibold text-foreground">{group.agent}</h3>
+                        <span className="text-xs text-muted-foreground">
+                          {group.notifications.length}
+                        </span>
+                      </div>
+                      <div className="space-y-2">
+                        {group.notifications.map((notification) => {
+                          const taskId = getNotificationTaskId(notification);
+                          const eventType = getNotificationEventType(notification);
+                          const isAcknowledging = acknowledgingIds[notification.id] ?? false;
+
+                          return (
+                            <article
+                              key={notification.id}
+                              className="rounded-lg border border-border/70 bg-card px-3 py-2"
+                            >
+                              <div className="flex items-start justify-between gap-3">
+                                <div className="min-w-0 space-y-1">
+                                  <div className="flex flex-wrap items-center gap-2">
+                                    <span className="font-mono text-xs text-foreground">
+                                      {taskId}
+                                    </span>
+                                    <Badge variant="secondary">{eventType}</Badge>
+                                  </div>
+                                  <time
+                                    className="block text-xs text-muted-foreground"
+                                    dateTime={notification.createdAt}
+                                  >
+                                    {formatNotificationAge(notification.createdAt)}
+                                  </time>
+                                </div>
+                                <Button
+                                  type="button"
+                                  variant="outline"
+                                  size="sm"
+                                  disabled={isAcknowledging}
+                                  onClick={() => {
+                                    void handleAck(notification.id);
+                                  }}
+                                  aria-label={`ACK notification ${taskId}`}
+                                >
+                                  {isAcknowledging ? (
+                                    <span className="flex items-center gap-2">
+                                      <Loader2
+                                        className="h-4 w-4 animate-spin"
+                                        aria-hidden="true"
+                                      />
+                                      ACK
+                                    </span>
+                                  ) : (
+                                    "ACK"
+                                  )}
+                                </Button>
+                              </div>
+                            </article>
+                          );
+                        })}
+                      </div>
+                    </section>
+                  ))}
+                </div>
+              </ScrollArea>
+            )}
+          </CardContent>
+        ) : null}
+      </Collapsible>
+      <span className="sr-only" aria-live="polite">
+        {pendingCount} pending notifications, refreshed at {new Date(now).toISOString()}
+      </span>
+    </Card>
+  );
+}