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llink/js/src/features/particles/stream-view.tsx
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TypeScript

import { useState, useEffect, useEffectEvent, useCallback, useRef } from "react";
import { useNavigate } from "react-router-dom";
import { useAuthStore } from "@/stores/auth-store";
import { apiClient } from "@/api/client";
import type { Particle } from "@/api/types";
import { parseParticlePath, type ParticlePath } from "@/lib/particle-path";
import { ComposeOverlay } from "@/features/compose/compose-overlay";
import { PlaybackPageIndicator } from "@/features/particles/playback-page-indicator";
import { MediaParticleView } from "@/features/particles/media-particle-view";
import { TextParticleView } from "@/features/particles/text-particle-view";
import { FallbackParticleView } from "@/features/particles/fallback-particle-view";
import { Avatar, AvatarFallback, AvatarGroup } from "@/components/ui/avatar";
import ControlsIndicator from "@/features/compose/controls-indicator";
import { Tooltip, TooltipContent, TooltipTrigger } from "@/components/ui/tooltip";
import { useNetwork, useNetworks } from "@/hooks/use-networks";
import { Button } from "@/components/ui/button";
import { Settings } from "lucide-react";
import { Breadcrumb, BreadcrumbItem, BreadcrumbList, BreadcrumbPage, BreadcrumbSeparator } from "@/components/ui/breadcrumb";
import { WindowControls } from "@/components/window-controls";
import { RelativeTimestamp } from "@/components/relative-timestamp";
import { useStreamPlayback } from "@/hooks/use-stream-playback";
import { usePrefetchAdjacentMedia } from "@/hooks/use-prefetch-adjacent-media";
import { usePresencePositions } from "@/hooks/use-presence-positions";
import { cn, getInitials } from "@/lib/utils";
function getParticleDisplayName(particle: Particle): string {
switch (particle.type) {
case "stream":
case "folder":
return particle.properties.name;
case "quest":
return particle.properties.title;
case "paper":
return particle.properties.title;
case "file":
return particle.properties.filename;
case "text":
return particle.properties.content.slice(0, 30);
case "media":
return particle.type;
}
}
// --- Exit countdown hook ---
const EXIT_DELAY_MS = 5000;
const EXIT_TICK_MS = 100;
type PlaybackStatus = "idle" | "playing" | "ended";
function useExitCountdown(
status: PlaybackStatus,
composeActive: boolean,
onExit: () => void,
) {
const [remainingMs, setRemainingMs] = useState<number | null>(null);
const handleExit = useEffectEvent(() => {
onExit();
});
// Start/cancel countdown based on playback status
useEffect(() => {
if (status === "ended") {
setRemainingMs(EXIT_DELAY_MS);
} else {
setRemainingMs(null);
}
}, [status]);
// Tick the countdown down (pauses when compose is active)
useEffect(() => {
if (remainingMs === null || remainingMs <= 0 || composeActive) return;
const interval = setInterval(() => {
setRemainingMs((prev) => {
if (prev === null) return null;
const next = prev - EXIT_TICK_MS;
return next <= 0 ? 0 : next;
});
}, EXIT_TICK_MS);
return () => clearInterval(interval);
}, [remainingMs !== null && remainingMs > 0, composeActive]);
// Navigate once countdown hits zero
useEffect(() => {
if (remainingMs !== null && remainingMs <= 0) {
handleExit();
}
}, [remainingMs]);
return remainingMs;
}
// --- StreamView ---
interface StreamViewProps {
streamParticle: Particle & { type: "stream" };
path: ParticlePath;
}
export function StreamView({ path, streamParticle }: StreamViewProps) {
const { networkId } = parseParticlePath(path);
const navigate = useNavigate();
const {
children,
currentParticle,
currentIndex,
status,
paused,
next,
prev,
goTo,
goToParticle,
pause,
resume,
} = useStreamPlayback(streamParticle, path);
usePrefetchAdjacentMedia(children, currentIndex);
const authedUser = useAuthStore((s) => s.user);
const network = useNetwork(networkId);
const presenceBySegment = usePresencePositions(
streamParticle.playback_markers,
children,
network?.humans,
authedUser?.id,
);
const [composeActive, setComposeActive] = useState(false);
const [progress, setProgress] = useState(0);
// Show/hide chrome on mouse activity (YouTube-style)
const [showControls, setShowControls] = useState(true);
const idleTimerRef = useRef<ReturnType<typeof setTimeout>>(undefined);
const handleMouseActivity = useCallback(() => {
setShowControls(true);
clearTimeout(idleTimerRef.current);
idleTimerRef.current = setTimeout(() => setShowControls(false), 3000);
}, []);
useEffect(() => () => clearTimeout(idleTimerRef.current), []);
// Always show controls when compose is active or exit countdown is visible
const controlsVisible = showControls || composeActive || status === "ended";
const handleExitNavigate = useCallback(() => {
navigate(`/${networkId}`);
}, [navigate, networkId]);
const exitRemainingMs = useExitCountdown(
status,
composeActive,
handleExitNavigate,
);
// Reset progress when particle changes
useEffect(() => {
setProgress(0);
}, [currentParticle?.id]);
// Pause/resume playback when compose overlay opens/closes
useEffect(() => {
if (composeActive) pause();
else resume();
}, [composeActive, pause, resume]);
// Playback keyboard: arrows, escape
useEffect(() => {
const handleKeyDown = (e: KeyboardEvent) => {
if (composeActive) return;
const target = e.target as HTMLElement;
if (
target.tagName === "INPUT" ||
target.tagName === "TEXTAREA" ||
target.isContentEditable
) {
return;
}
switch (e.key) {
case "ArrowRight":
case "ArrowDown":
e.preventDefault();
next();
break;
case "ArrowLeft":
case "ArrowUp":
e.preventDefault();
prev();
break;
case "Escape":
e.preventDefault();
navigate(`/${networkId}`);
break;
case "h": {
e.preventDefault();
apiClient.getLivekitToken(networkId, streamParticle.id).then(({ token, server_url }) => {
window.electronWindow.openHuddle({ token, serverUrl: server_url });
});
break;
}
}
}
window.addEventListener("keydown", handleKeyDown);
return () => window.removeEventListener("keydown", handleKeyDown);
},
[composeActive, next, prev, navigate, networkId, streamParticle.id],
);
// Click-to-navigate: left 30% = prev, right 70% = next
// Suppressed when the user has selected text (drag-to-select)
const handlePlaybackClick = useCallback(
(e: React.MouseEvent<HTMLDivElement>) => {
const selection = window.getSelection();
if (selection && selection.toString().length > 0) return;
const rect = e.currentTarget.getBoundingClientRect();
const x = (e.clientX - rect.left) / rect.width;
if (x < 0.3) prev();
else if (x > 0.7) next();
},
[prev, next],
);
const onLocalParticleCreated = useCallback(
(particleId: string) => {
goToParticle(particleId);
}, [goToParticle]);
if (children.length === 0) {
return (
<div className="flex h-full flex-col items-center justify-center gap-4 bg-black text-white">
<p className="text-muted-foreground text-sm">
No particles in this stream yet
</p>
<ControlsIndicator type="reply" showEscape={true}>
<span>
<kbd className="rounded bg-white/10 px-1.5 py-0.5 font-mono text-xs">
H
</kbd>{" "}
huddle
</span>
</ControlsIndicator>
<ComposeOverlay
networkId={networkId}
targetPath={path}
onActiveChange={setComposeActive}
/>
</div>
);
}
// Render particle content inline
function renderParticle(particle: Particle) {
switch (particle.type) {
case "media":
return (
<MediaParticleView
key={particle.id}
particle={particle}
streamPath={path}
paused={paused}
onEnded={next}
onProgress={setProgress}
/>
);
case "text":
return (
<TextParticleView
key={particle.id}
particle={particle}
streamPath={path}
paused={paused}
onEnded={next}
onProgress={setProgress}
/>
);
default:
return <FallbackParticleView particle={particle} />;
}
}
return (
<div
className="relative flex h-screen flex-col overflow-hidden bg-black text-white"
onMouseMove={handleMouseActivity}
onMouseLeave={() => setShowControls(false)}
>
{/* Top gradient safe zone */}
<div className="pointer-events-none absolute inset-x-0 top-0 z-[5] h-32 bg-gradient-to-b from-black/60 to-transparent" />
{/* TopBar — always visible */}
<div className="z-10 absolute left-0 right-0 mt-3">
<TopBar networkId={networkId} particle={currentParticle} streamParticle={streamParticle} />
</div>
{/* Main playback area */}
<div className="flex-1 overflow-hidden">
{currentParticle && (
<div
className="relative flex h-full w-full cursor-pointer items-center justify-center"
onClick={handlePlaybackClick}
>
{renderParticle(currentParticle)}
</div>
)}
</div>
<ComposeOverlay
networkId={networkId}
targetPath={path}
onActiveChange={setComposeActive}
onParticleCreated={onLocalParticleCreated}
/>
{/* BottomBar */}
<BottomBar
visible={controlsVisible}
total={children.length}
current={currentIndex}
progress={progress}
onGoTo={goTo}
presenceBySegment={presenceBySegment}
exitRemainingMs={exitRemainingMs}
/>
</div>
);
}
function BottomBar({
visible,
total,
current,
progress,
onGoTo,
presenceBySegment,
exitRemainingMs,
}: {
visible: boolean;
total: number;
current: number;
progress: number;
onGoTo: (index: number) => void;
presenceBySegment: Map<number, import("@/hooks/use-presence-positions").HumanPresence[]>;
exitRemainingMs: number | null;
}) {
return (
<div className={cn(
"absolute inset-x-0 bottom-0 z-10 transition-all duration-300",
visible ? "opacity-100 translate-y-0" : "opacity-0 translate-y-2 pointer-events-none",
)}>
{/* Presence avatars — above the blurred background */}
<PlaybackPageIndicator
total={total}
current={current}
progress={progress}
onGoTo={onGoTo}
presenceBySegment={presenceBySegment}
layer="avatars"
/>
{/* Blurred background container — tracks + controls */}
<div className="pb-3">
<PlaybackPageIndicator
total={total}
current={current}
progress={progress}
onGoTo={onGoTo}
layer="tracks"
/>
<div className="flex items-center justify-center px-3 pt-2">
{exitRemainingMs !== null && (
<div className="flex justify-center">
<span className="rounded-full bg-black/30 px-2 text-xs text-white/70 backdrop-blur-sm">
Closing in {Math.ceil(exitRemainingMs / 1000)}s
</span>
</div>
)}
<ControlsIndicator type="reply" showEscape={true}>
<span>
<kbd className="rounded bg-white/10 px-1.5 py-0.5 font-mono text-xs">
H
</kbd>{" "}
huddle
</span>
</ControlsIndicator>
</div>
</div>
</div>
);
}
function TopBar({ networkId, particle, streamParticle }: { networkId: string; particle: Particle | null; streamParticle: Particle & { type: "stream" } }) {
const navigate = useNavigate();
const network = useNetwork(networkId);
const huddleParticipants = streamParticle.huddle_active_participants ?? [];
const hasActiveHuddle = huddleParticipants.length > 0;
const handleJoinHuddle = () => {
apiClient.getLivekitToken(networkId, streamParticle.id).then(({ token, server_url }) => {
window.electronWindow.openHuddle({ token, serverUrl: server_url });
});
};
return (
<div className="drag-region flex flex-row px-4 gap-5 items-center">
<WindowControls />
<Breadcrumb className="no-drag rounded-full bg-black/30 backdrop-blur-sm px-3 py-1 mx-auto">
<BreadcrumbList>
{streamParticle && (
<>
<BreadcrumbItem className="text-xs">
<BreadcrumbPage>{getParticleDisplayName(streamParticle)}</BreadcrumbPage>
</BreadcrumbItem>
</>
)}
{particle && (
<>
<BreadcrumbSeparator />
<BreadcrumbItem className="text-xs">
<BreadcrumbPage><ParticleBreadcrumbContent particle={particle} networkId={networkId} /></BreadcrumbPage>
</BreadcrumbItem>
</>
)}
</BreadcrumbList>
</Breadcrumb>
{hasActiveHuddle && (
<button
onClick={handleJoinHuddle}
className="no-drag flex items-center gap-2 rounded-full bg-red-500/20 px-3 py-1 backdrop-blur-sm transition-colors hover:bg-red-500/30"
>
<span className="relative flex size-2">
<span className="absolute inline-flex size-full animate-ping rounded-full bg-red-400 opacity-75" />
<span className="relative inline-flex size-2 rounded-full bg-red-500" />
</span>
<AvatarGroup>
{huddleParticipants.map((humanId) => {
const human = network?.humans?.find((h) => h.id === humanId);
const initials = human ? getInitials(human.email) : "?";
return (
<Tooltip key={humanId}>
<TooltipTrigger asChild>
<Avatar size="sm">
<AvatarFallback className="bg-red-500/30 text-[8px] text-red-200">
{initials}
</AvatarFallback>
</Avatar>
</TooltipTrigger>
<TooltipContent>{human?.email ?? humanId}</TooltipContent>
</Tooltip>
);
})}
</AvatarGroup>
<span className="text-xs font-medium text-red-200">Join</span>
</button>
)}
<Button
variant="ghost"
size="sm"
className="no-drag text-muted-foreground"
onClick={() => navigate("/settings")}
>
<Settings className="size-3.5" />
</Button>
</div>
);
}
function NetworkBreadcrumbContent({ networkId }: { networkId: string }) {
const { data: networks } = useNetworks();
const network = networks?.find((n) => n.id === networkId);
const name = network?.name ?? networkId;
const initials = name.slice(0, 2).toUpperCase();
return (
<span className="flex items-center gap-1.5">
<Avatar size="sm">
<AvatarFallback>
{initials}
</AvatarFallback>
</Avatar>
{name}
</span>
);
}
function ParticleBreadcrumbContent({ particle, networkId }: { particle: Particle; networkId: string }) {
const network = useNetwork(networkId);
const creator = network?.humans?.find((h) => h.id === particle.created_by_human_id);
const prefix = creator?.email_prefix ?? particle.created_by_human_id;
const initials = prefix.slice(0, 2).toUpperCase();
return (
<span className="flex
items-center gap-1.5">
<Avatar size="sm">
<AvatarFallback>
{initials}
</AvatarFallback>
</Avatar>
{prefix} - <RelativeTimestamp date={particle.created_at} />
</span>
)
}