Map: pin 511NY camera feeds as tiles on the map (#183)

Clicking a camera's snapshot pins a 192x108 tile anchored at the camera --
the live HLS stream when the camera has one (hls.js; Safari native), else the
snapshot refreshed every 60s, falling back to the snapshot if the stream dies.
Up to 6 pins, oldest dropped. Players exist only while the DOT Cameras overlay
is on, so hiding it stops every stream.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

drb-frontend/app/globals.css

@@ -177,6 +177,18 @@ html:not(.dark) .border-indigo-800 { border-color: #a5b4fc !important; }
   z-index: 0;
 }
 
+/* Pinned 511 camera tiles (MapView DotCameraLayer): strip Leaflet's tooltip
+ * padding and let the tile's own theme colours show, so the tile is no bigger
+ * than the video it holds. */
+.leaflet-tooltip.drb-cam-pin {
+  padding: 0;
+  border-radius: 6px;
+  background: var(--surface);
+  border: 1px solid var(--line-strong);
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.45);
+  white-space: normal;
+}
+
 /* ── Form inputs ─────────────────────────────────────────────────────────── */
 html:not(.dark) input:not([type="submit"]):not([type="button"]):not([type="reset"]),
 html:not(.dark) select,

drb-frontend/components/CameraFeed.tsx

@@ -0,0 +1,64 @@
+"use client";
+
+import { useEffect, useRef, useState } from "react";
+import type HlsType from "hls.js";
+import type { Ny511Camera } from "@/lib/types";
+
+// 511NY stills are served with max-age=60, so refreshing faster buys nothing.
+const SNAPSHOT_REFRESH_MS = 60_000;
+
+/**
+ * One 511NY camera: the live HLS stream when the camera has one (NYSDOT's
+ * skyvdn hosts send Access-Control-Allow-Origin: *), otherwise its snapshot on
+ * a timer. A stream that fails falls back to the snapshot rather than a black box.
+ */
+export function CameraFeed({ camera, className }: { camera: Ny511Camera; className?: string }) {
+  const videoRef = useRef<HTMLVideoElement>(null);
+  const [videoFailed, setVideoFailed] = useState(false);
+  const [tick, setTick] = useState(() => Date.now());
+  const useVideo = !!camera.video_url && !videoFailed;
+
+  useEffect(() => {
+    if (useVideo) return;
+    const id = setInterval(() => setTick(Date.now()), SNAPSHOT_REFRESH_MS);
+    return () => clearInterval(id);
+  }, [useVideo]);
+
+  useEffect(() => {
+    const video = videoRef.current;
+    const src = camera.video_url;
+    if (!useVideo || !video || !src) return;
+    let hls: HlsType | null = null;
+    let cancelled = false;
+
+    if (video.canPlayType("application/vnd.apple.mpegurl")) {
+      video.src = src;   // Safari/iOS play HLS natively
+    } else {
+      import("hls.js")
+        .then(({ default: Hls }) => {
+          if (cancelled) return;
+          if (!Hls.isSupported()) { setVideoFailed(true); return; }
+          hls = new Hls({ maxBufferLength: 10, backBufferLength: 0 });
+          hls.on(Hls.Events.ERROR, (_evt, data) => { if (data.fatal) setVideoFailed(true); });
+          hls.loadSource(src);
+          hls.attachMedia(video);
+        })
+        .catch(() => setVideoFailed(true));
+    }
+    return () => {
+      cancelled = true;
+      hls?.destroy();
+      video.removeAttribute("src");
+      video.load();   // stop the download, not just the playback
+    };
+  }, [useVideo, camera.video_url]);
+
+  if (useVideo) {
+    return <video ref={videoRef} muted autoPlay playsInline className={className} onError={() => setVideoFailed(true)} />;
+  }
+  if (!camera.image_url) {
+    return <div className={`${className ?? ""} flex items-center justify-center text-[10px] text-ink-muted`}>No image</div>;
+  }
+  // eslint-disable-next-line @next/next/no-img-element
+  return <img src={`${camera.image_url}?t=${tick}`} alt={`Camera: ${camera.name}`} className={className} />;
+}

drb-frontend/components/MapView.tsx

@@ -22,7 +22,8 @@ import { useAircraft } from "@/lib/useAircraft";
 import { useAircraftTrail } from "@/lib/useAircraftTrail";
 import { useVessels } from "@/lib/useVessels";
 import { use511 } from "@/lib/use511";
-import type { Ny511Event, Ny511FeedStatus } from "@/lib/types";
+import type { Ny511Camera, Ny511Event, Ny511FeedStatus } from "@/lib/types";
+import { CameraFeed } from "@/components/CameraFeed";
 
 // ── Leaflet icon fix ──────────────────────────────────────────────────────────
 delete (L.Icon.Default.prototype as unknown as Record<string, unknown>)._getIconUrl;
@@ -380,14 +381,28 @@ function FeedProblem({ map, label, status, fetchError }: { map: L.Map; label: st
   );
 }
 
+// Pinned cameras: clicking a camera's snapshot pins its live feed as a small
+// tile anchored at the camera, so several views along one road can be read
+// against the map. Oldest pin drops past the cap.
+const MAX_CAMERA_PINS = 6;
+
 function DotCameraLayer() {
   const map = useMap();
   const shown = useOverlayShown(map, OVERLAY_DOT_CAMERAS);
   const { data, error } = use511(map, "cameras", shown);
+  const [pinned, setPinned] = useState<Ny511Camera[]>([]);
+  const pinnedIds = useMemo(() => new Set(pinned.map((c) => c.id)), [pinned]);
+
+  const pin = (c: Ny511Camera) => {
+    map.closePopup();
+    setPinned((prev) => (prev.some((p) => p.id === c.id) ? prev : [...prev, c].slice(-MAX_CAMERA_PINS)));
+  };
+  const unpin = (id: string) => setPinned((prev) => prev.filter((p) => p.id !== id));
+
   return (
     <>
       {shown && <FeedProblem map={map} label="DOT cameras" status={data.cameras_status} fetchError={error} />}
-      {(data.cameras ?? []).map((c) => (
+      {(data.cameras ?? []).filter((c) => !pinnedIds.has(c.id)).map((c) => (
         <Marker key={c.id} position={[c.lat, c.lon]} icon={cameraIcon()}>
           <Popup minWidth={260} maxWidth={340}>
             <div className="space-y-1">
@@ -395,14 +410,32 @@ function DotCameraLayer() {
               {c.roadway && <div className="text-xs text-ink-muted">{c.roadway}{c.direction && c.direction !== "Unknown" ? ` · ${c.direction}` : ""}</div>}
               {c.image_url && (
                 // Popup content mounts on open, so the timestamp busts the cache per open.
-                // eslint-disable-next-line @next/next/no-img-element
+                <button type="button" onClick={() => pin(c)} title="Pin this camera to the map" className="block w-full p-0 border-0 bg-transparent cursor-pointer">
-                <img src={`${c.image_url}?t=${Date.now()}`} alt={`Camera: ${c.name}`} className="w-full rounded border border-line" loading="lazy" />
+                  {/* eslint-disable-next-line @next/next/no-img-element */}
+                  <img src={`${c.image_url}?t=${Date.now()}`} alt={`Camera: ${c.name}`} className="w-full rounded border border-line" loading="lazy" />
+                </button>
               )}
-              <div className="text-[10px] text-ink-muted">Snapshot: 511NY / NYSDOT</div>
+              <div className="text-[10px] text-ink-muted">
+                Click the image to pin {c.video_url ? "the live feed" : "it"} to the map · 511NY / NYSDOT
+              </div>
             </div>
           </Popup>
         </Marker>
       ))}
+      {/* Players only exist while the overlay is on, so hiding it stops every stream. */}
+      {shown && pinned.map((c) => (
+        <Marker key={`pin-${c.id}`} position={[c.lat, c.lon]} icon={cameraIcon()} zIndexOffset={300}>
+          <Tooltip permanent interactive direction="top" offset={[0, -8]} opacity={1} className="drb-cam-pin">
+            <div className="w-[192px]">
+              <div className="flex items-center gap-1 px-1.5 h-4">
+                <span className="flex-1 truncate text-[10px] leading-4 text-ink-2" title={c.name}>{c.name}</span>
+                <button type="button" onClick={() => unpin(c.id)} aria-label={`Unpin ${c.name}`} className="text-ink-muted hover:text-ink text-xs leading-none px-0.5">×</button>
+              </div>
+              <CameraFeed camera={c} className="block w-[192px] h-[108px] object-cover bg-black rounded-b" />
+            </div>
+          </Tooltip>
+        </Marker>
+      ))}
     </>
   );
 }

drb-frontend/package.json

@@ -13,6 +13,7 @@
     "react": "^18.3.0",
     "react-dom": "^18.3.0",
     "firebase": "^10.12.0",
+    "hls.js": "^1.5.0",
     "leaflet": "^1.9.4",
 "react-leaflet": "^4.2.1",
     "react-markdown": "^9.0.1"