feat: Inicializa a aplicação Downloader com backend para gerenciamento de sessões e downloads, e frontend para interação.

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Evandro Fonseca Junior committed 2026-02-14 18:52:54 -03:00
1 parent c2cadc25f3
commit 5b1600c210
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@@ -1,230 +1,91 @@
import { useState } from "react";
import { Layout } from "./components/ui/Layout";
import "./App.css";
import { DownloadForm } from "./components/feature/DownloadForm";
import { DownloadItem, type DownloadItemData } from "./components/feature/DownloadItem";
import { Card, CardContent, CardHeader, CardTitle } from "./components/ui/Card";
import { DownloadItem } from "./components/feature/DownloadItem";
import { Layout } from "./components/ui/Layout";
import { Alert, AlertDescription, AlertTitle } from "./components/ui/Alert";
import { AlertCircle } from "lucide-react";
import { SessionProvider, useSession } from "./context/SessionContext";
import { SessionTimer } from "./components/feature/SessionTimer";
const API_URL = import.meta.env.VITE_API_URL ?? "http://localhost:3000";
function DownloadList() {
const { tasks, expiresAt } = useSession();
function App() {
const [downloads, setDownloads] = useState<DownloadItemData[]>([]);
return (
<div className="space-y-4">
<div className="flex items-center justify-between">
<h2 className="text-xl font-semibold tracking-tight">Active Downloads</h2>
<SessionTimer expiresAt={expiresAt} />
</div>
const startDownload = async (itemId: number, url: string, resume = false) => {
const existing = downloads.find((item) => item.id === itemId);
const alreadyReceived = resume && existing?.receivedBytes
? existing.receivedBytes
: 0;
{tasks.length === 0 ? (
<div className="flex flex-col items-center justify-center py-12 text-center text-muted-foreground border-2 border-dashed rounded-lg bg-card/50">
<p>No downloads in session</p>
<p className="text-xs opacity-70">Files are removed after 1 hour of inactivity</p>
</div>
) : (
<div className="grid gap-4">
{tasks.map((task) => (
<DownloadItem key={task.id} item={task} />
))}
</div>
)}
</div>
);
}
setDownloads((current) =>
current.map((item) =>
item.id === itemId
? {
...item,
status: "downloading",
progress: item.progress ?? 0,
error: undefined,
speedHistory: [], // Reset history on start/resume
}
: item,
),
);
function Main() {
const { queueDownload } = useSession();
const handleDownload = async (url: string) => {
try {
const query = new URLSearchParams({
url,
});
if (resume && alreadyReceived > 0) {
query.set("offset", String(alreadyReceived));
}
const response = await fetch(
`${API_URL}/stream?${query.toString()}`,
);
if (!response.ok || !response.body) {
const message = "Failed to start download.";
setDownloads((current) =>
current.map((item) =>
item.id === itemId
? { ...item, status: "error", error: message, progress: null }
: item,
),
);
return;
}
const contentLengthHeader =
response.headers.get("x-origin-content-length") ??
response.headers.get("content-length");
const totalBytes = contentLengthHeader
? Number.parseInt(contentLengthHeader, 10)
: 0;
const reader = response.body.getReader();
const chunks: BlobPart[] = [];
let received = alreadyReceived;
const startedAt = performance.now();
// eslint-disable-next-line no-constant-condition
while (true) {
const { done, value } = await reader.read();
if (done) break;
if (value) {
chunks.push(value.buffer as ArrayBuffer);
received += value.length;
const elapsedSeconds = (performance.now() - startedAt) / 1000;
const bytesPerSecond =
elapsedSeconds > 0 ? received / elapsedSeconds : 0;
const percentage =
totalBytes > 0 ? Math.round((received / totalBytes) * 100) : null;
setDownloads((current) =>
current.map((item) => {
if (item.id !== itemId) return item;
const newHistory = [...(item.speedHistory || []), bytesPerSecond];
// Keep last 50 data points for the graph
if (newHistory.length > 50) newHistory.shift();
return {
...item,
progress: percentage,
receivedBytes: received,
totalBytes: totalBytes || item.totalBytes,
speedBytesPerSecond: bytesPerSecond,
speedHistory: newHistory,
};
}),
);
}
}
const contentType =
response.headers.get("content-type") ?? "application/octet-stream";
const blob = new Blob(chunks, { type: contentType });
const disposition = response.headers.get("content-disposition");
const fallbackName = (() => {
try {
const parsed = new URL(url);
const nameFromPath = parsed.pathname.split("/").filter(Boolean).pop();
return nameFromPath ?? "download.bin";
} catch {
return "download.bin";
}
})();
const filename = (() => {
if (disposition) {
const match =
/filename\*?=(?:UTF-8''|")?([^";]+)/i.exec(disposition);
if (match?.[1]) {
return decodeURIComponent(match[1].replace(/"/g, ""));
}
}
return fallbackName;
})();
const blobUrl = URL.createObjectURL(blob);
const link = document.createElement("a");
link.href = blobUrl;
link.download = filename;
document.body.appendChild(link);
link.click();
document.body.removeChild(link);
URL.revokeObjectURL(blobUrl);
setDownloads((current) =>
current.map((item) =>
item.id === itemId
? { ...item, status: "completed", progress: 100 }
: item,
),
);
} catch (err) {
const message =
err instanceof Error ? err.message : "Unexpected error during download.";
setDownloads((current) =>
current.map((item) =>
item.id === itemId
? { ...item, status: "error", error: message, progress: null }
: item,
),
);
await queueDownload(url);
} catch (error) {
console.error("Failed to queue", error);
}
};
const handleNewDownloads = (urls: string[]) => {
const baseId = Date.now();
const newItems: DownloadItemData[] = urls.map((value, index) => ({
id: baseId + index,
url: value,
status: "pending",
progress: 0,
speedHistory: [],
}));
setDownloads((current) => [...newItems, ...current]);
newItems.forEach((item) => {
void startDownload(item.id, item.url);
});
};
const handleRetry = (id: number, url: string) => {
void startDownload(id, url, true);
};
return (
<Layout>
<div className="grid gap-8 lg:grid-cols-[400px_1fr]">
<div className="space-y-6">
<DownloadForm onSubmit={handleNewDownloads} />
<Card className="border-border/50 bg-card/50 backdrop-blur-sm hidden lg:block">
<CardHeader>
<CardTitle className="text-lg">Tips</CardTitle>
</CardHeader>
<CardContent className="text-sm text-muted-foreground space-y-2">
<p>• Use direct links ending in .iso, .zip, .mp4, etc.</p>
<p>• Downloads are streamed directly to your browser memory, then saved.</p>
<p>• If the tab closes, the download is lost.</p>
</CardContent>
</Card>
</div>
<section className="space-y-6">
<div className="flex items-center justify-between">
<h2 className="text-2xl font-bold tracking-tight">Active Downloads</h2>
<span className="text-sm text-muted-foreground">{downloads.length} items</span>
</div>
<div className="space-y-4">
{downloads.length === 0 ? (
<div className="flex flex-col items-center justify-center rounded-lg border border-dashed p-12 text-center animate-in fade-in-50">
<div className="mb-4 rounded-full bg-secondary/50 p-4">
<div className="i-lucide-download size-8 text-muted-foreground" />
</div>
<h3 className="text-lg font-semibold">No downloads yet</h3>
<p className="mt-2 text-sm text-muted-foreground max-w-sm">
Paste your links on the left sidebar to get started. The VPS proxy will handle the connection.
<div className="grid gap-8 lg:grid-cols-12">
{/* Left Column: Input Form */}
<div className="lg:col-span-4 space-y-6">
<div className="sticky top-24 space-y-6">
<section className="space-y-4">
<div className="space-y-2">
<h2 className="text-xl font-semibold tracking-tight">New Download</h2>
<p className="text-sm text-muted-foreground">
Paste a link to start. Files are downloaded to the server first.
</p>
</div>
) : (
downloads.map((item) => (
<DownloadItem
key={item.id}
item={item}
onRetry={handleRetry}
/>
))
)}
<DownloadForm onDownload={handleDownload} />
</section>
<Alert variant="destructive">
<AlertCircle className="h-4 w-4" />
<AlertTitle>Ephemeral Session</AlertTitle>
<AlertDescription>
Files are stored for <strong>1 hour</strong>. The timer resets on interaction.
After expiration, all files are permanently deleted.
</AlertDescription>
</Alert>
</div>
</section>
</div>
{/* Right Column: Downloads List */}
<div className="lg:col-span-8">
<DownloadList />
</div>
</div>
</Layout>
);
}
function App() {
return (
<SessionProvider>
<Main />
</SessionProvider>
);
}
export default App;
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import { useState } from "react";
import type { FormEvent } from "react";
import { Download } from "lucide-react";
import { Button } from "../ui/Button";
import { Textarea } from "../ui/Textarea";
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "../ui/Card";
import { Input } from "../ui/Input";
import { Download } from "lucide-react";
import { z } from "zod";
const formSchema = z.object({
url: z.string().url("Please enter a valid URL"),
});
interface DownloadFormProps {
onSubmit: (urls: string[]) => void;
onDownload: (url: string) => void;
}
export function DownloadForm({ onSubmit }: DownloadFormProps) {
const [text, setText] = useState("");
export function DownloadForm({ onDownload }: DownloadFormProps) {
const [url, setUrl] = useState("");
const [error, setError] = useState<string | null>(null);
const handleSubmit = (e: FormEvent) => {
const handleSubmit = (e: React.FormEvent) => {
e.preventDefault();
setError(null);
const urls = text
.split(/\r?\n/)
.map((u) => u.trim())
.filter(Boolean);
const result = formSchema.safeParse({ url });
if (urls.length === 0) {
setError("Please enter at least one URL.");
if (!result.success) {
setError(result.error.errors[0].message);
return;
}
const invalidUrl = urls.find((u) => {
try {
new URL(u);
return false;
} catch {
return true;
}
});
if (invalidUrl) {
setError(`Invalid URL detected: ${invalidUrl}`);
return;
}
onSubmit(urls);
setText("");
onDownload(url);
setUrl("");
};
return (
<Card className="border-border/50 bg-card/50 backdrop-blur-sm">
<CardHeader>
<CardTitle>New Download</CardTitle>
<CardDescription>
Enter direct links (HTTP/HTTPS) to stream via VPS. One URL per line.
</CardDescription>
</CardHeader>
<CardContent>
<form onSubmit={handleSubmit} className="space-y-4">
<Textarea
placeholder="https://example.com/file.iso"
className="min-h-[120px] font-mono text-sm"
value={text}
onChange={(e) => setText(e.target.value)}
<form onSubmit={handleSubmit} className="flex w-full flex-col gap-4">
<div className="flex w-full items-start gap-2">
<div className="flex-1 space-y-1">
<Input
type="url"
placeholder="https://example.com/file.zip"
value={url}
onChange={(e) => setUrl(e.target.value)}
className={error ? "border-destructive focus-visible:ring-destructive" : ""}
/>
{error && <p className="text-sm text-destructive">{error}</p>}
<div className="flex justify-end">
<Button type="submit" className="w-full sm:w-auto">
<Download className="mr-2 size-4" />
Start Download
</Button>
</div>
</form>
</CardContent>
</Card>
{error && <p className="text-xs text-destructive">{error}</p>}
</div>
<Button type="submit">
<Download className="mr-2 h-4 w-4" />
Download
</Button>
</div>
</form>
);
}
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@@ -1,153 +1,137 @@
import {
Download,
FileCheck,
FileWarning,
Loader2,
Play,
Server,
HardDrive
} from "lucide-react";
import { Button } from "../ui/Button";
import { Card, CardContent } from "../ui/Card";
import { Progress } from "../ui/ProgressBar";
import { formatBytes, formatSpeed } from "../../lib/utils";
export type DownloadStatus = "pending" | "downloading" | "completed" | "error";
const API_URL = import.meta.env.VITE_API_URL || "http://localhost:3000";
export type DownloadStatus = "queued" | "downloading" | "completed" | "error";
export type DownloadItemData = {
id: number;
id: string;
sessionId: string;
url: string;
filename: string;
status: DownloadStatus;
progress: number | null;
receivedBytes?: number;
totalBytes?: number;
speedBytesPerSecond?: number;
speedHistory: number[];
progress: number;
totalBytes: number;
receivedBytes: number;
speed: number;
error?: string;
createdAt: number;
};
interface DownloadItemProps {
item: DownloadItemData;
onRetry: (id: number, url: string) => void;
}
export function DownloadItem({ item, onRetry }: DownloadItemProps) {
export function DownloadItem({ item }: DownloadItemProps) {
const isCompleted = item.status === "completed";
const isError = item.status === "error";
const isDownloading = item.status === "downloading";
const isQueued = item.status === "queued";
const handleDownloadFile = () => {
const download = async () => {
try {
const sessionId = localStorage.getItem("downloader_session_id") || "";
const res = await fetch(`${API_URL}/api/download/${item.id}`, {
headers: { "x-session-id": sessionId }
});
if (!res.ok) throw new Error("Download failed");
const blob = await res.blob();
const url = window.URL.createObjectURL(blob);
const a = document.createElement("a");
a.href = url;
a.download = item.filename;
document.body.appendChild(a);
a.click();
window.URL.revokeObjectURL(url);
document.body.removeChild(a);
} catch (e) {
alert("Failed to download file");
}
};
download();
};
return (
<Card className="overflow-hidden transition-all hover:bg-muted/50">
<CardContent className="p-4">
<div className="flex items-start justify-between gap-4">
<div className="min-w-0 flex-1 space-y-3">
<div className="flex items-center gap-2">
<div
className={`flex size-8 shrink-0 items-center justify-center rounded-full bg-secondary text-muted-foreground ${isCompleted ? "bg-green-500/10 text-green-500" : ""
} ${isError ? "bg-red-500/10 text-red-500" : ""} ${isDownloading ? "bg-primary/10 text-primary" : ""
}`}
>
{isCompleted ? (
<FileCheck className="size-4" />
) : isError ? (
<FileWarning className="size-4" />
) : isDownloading ? (
<Download className="size-4 animate-bounce" />
) : (
<Loader2 className="size-4 animate-spin" />
)}
<div className="flex items-start gap-4">
<div className="mt-1">
{isCompleted ? (
<div className="flex h-10 w-10 items-center justify-center rounded-full bg-green-500/10 text-green-500">
<FileCheck className="h-5 w-5" />
</div>
<div className="min-w-0 flex-1">
<p className="truncate text-sm font-medium leading-none">
{item.url.split("/").pop() || item.url}
</p>
<p className="mt-1 truncate text-xs text-muted-foreground">
{item.url}
</p>
) : isError ? (
<div className="flex h-10 w-10 items-center justify-center rounded-full bg-destructive/10 text-destructive">
<FileWarning className="h-5 w-5" />
</div>
</div>
<div className="space-y-1">
<div className="flex items-center justify-between text-xs text-muted-foreground">
<span>{item.progress ?? 0}%</span>
<span>
<span>
{item.status === "downloading" &&
formatSpeed(item.speedBytesPerSecond)}
</span>
</span>
) : isQueued ? (
<div className="flex h-10 w-10 items-center justify-center rounded-full bg-secondary text-secondary-foreground">
<Server className="h-5 w-5 animate-pulse" />
</div>
<Progress
value={item.progress}
className={`h-2 ${isError ? "bg-red-900/20" : ""} ${isCompleted ? "bg-green-900/20" : ""
}`}
indicatorClassName={`${isError ? "bg-red-500" : ""} ${isCompleted ? "bg-green-500" : ""
}`}
/>
{/* Sparkline for speed history */}
{item.status === "downloading" && item.speedHistory.length > 1 && (
<div className="h-8 w-full overflow-hidden opacity-50">
<svg
className="h-full w-full"
viewBox={`0 0 ${item.speedHistory.length - 1} 100`}
preserveAspectRatio="none"
>
<path
d={`M 0,100 ${item.speedHistory
.map((s, i) => {
const max = Math.max(...item.speedHistory);
const y = max > 0 ? 100 - (s / max) * 100 : 100;
return `L ${i},${y}`;
})
.join(" ")} L ${item.speedHistory.length - 1},100 Z`}
fill="currentColor"
className="text-primary/20"
/>
<path
d={`M 0,${100 - (item.speedHistory[0] / Math.max(...item.speedHistory)) * 100} ${item.speedHistory
.map((s, i) => {
const max = Math.max(...item.speedHistory);
const y = max > 0 ? 100 - (s / max) * 100 : 100;
return `L ${i},${y}`;
})
.join(" ")}`}
fill="none"
stroke="currentColor"
strokeWidth="1"
className="text-primary"
vectorEffect="non-scaling-stroke"
/>
</svg>
</div>
)}
<div className="flex items-center justify-between text-xs text-muted-foreground">
<span>
{formatBytes(item.receivedBytes)} /{" "}
{formatBytes(item.totalBytes)}
</span>
<span className="capitalize">{item.status}</span>
</div>
</div>
{isError && (
<div className="rounded-md bg-destructive/10 p-2 text-xs text-destructive">
{item.error}
) : (
<div className="flex h-10 w-10 items-center justify-center rounded-full bg-primary/10 text-primary">
<Loader2 className="h-5 w-5 animate-spin" />
</div>
)}
</div>
<div className="flex flex-col gap-2">
<div className="flex-1 space-y-1 min-w-0">
<div className="flex items-start justify-between gap-2">
<div className="space-y-1 truncate">
<h3 className="font-medium leading-none truncate" title={item.filename || item.url}>
{item.filename || item.url}
</h3>
<p className="text-xs text-muted-foreground truncate" title={item.url}>
{item.url}
</p>
</div>
{isCompleted && (
<Button size="sm" onClick={handleDownloadFile} className="shrink-0 gap-2">
<HardDrive className="w-4 h-4" />
Save to Disk
</Button>
)}
</div>
{/* Progress Section */}
{!isCompleted && !isError && (
<div className="space-y-2 pt-2">
<div className="flex justify-between text-xs text-muted-foreground">
<span>{isQueued ? "Queued on server..." : item.status}</span>
<span>{formatBytes(item.receivedBytes || 0)} / {item.totalBytes ? formatBytes(item.totalBytes) : "??"}</span>
</div>
<Progress value={item.progress || 0} className="h-1.5" />
<div className="flex justify-between text-xs text-muted-foreground">
<span>{item.speed ? formatSpeed(item.speed) : "0 B/s"}</span>
<span>{item.progress ? `${Math.round(item.progress)}%` : "0%"}</span>
</div>
</div>
)}
{isCompleted && (
<div className="pt-2 flex items-center gap-2 text-xs text-green-500">
<FileCheck className="w-3 h-3" />
<span>Ready for download ({formatBytes(item.totalBytes)})</span>
</div>
)}
{isError && (
<Button
variant="outline"
size="icon"
onClick={() => onRetry(item.id, item.url)}
className="h-8 w-8"
>
<Play className="size-4" />
</Button>
<div className="text-sm text-destructive pt-1">
{item.error || "Unknown error occurred"}
</div>
)}
{/* Placeholder for pause/cancel in future */}
</div>
</div>
</CardContent>
@@ -0,0 +1,48 @@
import { useEffect, useState } from "react";
import { Clock } from "lucide-react";
import { cn } from "../../lib/utils";
interface SessionTimerProps {
expiresAt: string | null;
className?: string;
}
export function SessionTimer({ expiresAt, className }: SessionTimerProps) {
const [timeLeft, setTimeLeft] = useState<string>("--:--");
const [isCritical, setIsCritical] = useState(false);
useEffect(() => {
if (!expiresAt) return;
const tick = () => {
const now = Date.now();
const end = new Date(expiresAt).getTime();
const diff = Math.max(0, end - now);
if (diff <= 0) {
setTimeLeft("Expired");
setIsCritical(true);
return;
}
const minutes = Math.floor(diff / 60000);
const seconds = Math.floor((diff % 60000) / 1000);
setTimeLeft(`${minutes.toString().padStart(2, "0")}:${seconds.toString().padStart(2, "0")}`);
setIsCritical(minutes < 5); // Critical if less than 5 minutes
};
tick(); // Initial call
const interval = setInterval(tick, 1000);
return () => clearInterval(interval);
}, [expiresAt]);
if (!expiresAt) return null;
return (
<div className={cn("flex items-center gap-2 text-sm font-medium", isCritical ? "text-destructive" : "text-muted-foreground", className)}>
<Clock className="w-4 h-4" />
<span>Session: {timeLeft}</span>
</div>
);
}
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import * as React from "react"
import { cn } from "../../lib/utils"
const Alert = React.forwardRef<
HTMLDivElement,
React.HTMLAttributes<HTMLDivElement> & { variant?: "default" | "destructive" }
>(({ className, variant = "default", ...props }, ref) => (
<div
ref={ref}
role="alert"
className={cn(
"relative w-full rounded-lg border p-4 [&>svg~*]:pl-7 [&>svg+div]:translate-y-[-3px] [&>svg]:absolute [&>svg]:left-4 [&>svg]:top-4 [&>svg]:text-foreground",
variant === "destructive" &&
"border-destructive/50 text-destructive dark:border-destructive [&>svg]:text-destructive",
className
)}
{...props}
/>
))
Alert.displayName = "Alert"
const AlertTitle = React.forwardRef<
HTMLParagraphElement,
React.HTMLAttributes<HTMLHeadingElement>
>(({ className, ...props }, ref) => (
<h5
ref={ref}
className={cn("mb-1 font-medium leading-none tracking-tight", className)}
{...props}
/>
))
AlertTitle.displayName = "AlertTitle"
const AlertDescription = React.forwardRef<
HTMLParagraphElement,
React.HTMLAttributes<HTMLParagraphElement>
>(({ className, ...props }, ref) => (
<div
ref={ref}
className={cn("text-sm [&_p]:leading-relaxed", className)}
{...props}
/>
))
AlertDescription.displayName = "AlertDescription"
export { Alert, AlertTitle, AlertDescription }
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import React, { createContext, useContext, useEffect, useState } from "react";
type SessionData = {
sessionId: string;
expiresAt: string;
remainingMs: number;
};
type DownloadTask = {
id: string;
sessionId: string;
url: string;
filename: string;
status: "queued" | "downloading" | "completed" | "error";
progress: number;
totalBytes: number;
receivedBytes: number;
speed: number;
error?: string;
createdAt: number;
};
type SessionContextType = {
sessionId: string;
tasks: DownloadTask[];
expiresAt: string | null;
queueDownload: (url: string) => Promise<void>;
refreshTasks: () => void;
};
const SessionContext = createContext<SessionContextType | null>(null);
const API_URL = import.meta.env.VITE_API_URL || "";
export function SessionProvider({ children }: { children: React.ReactNode }) {
const [sessionId, setSessionId] = useState<string>(() => {
return localStorage.getItem("downloader_session_id") || "";
});
const [tasks, setTasks] = useState<DownloadTask[]>([]);
const [expiresAt, setExpiresAt] = useState<string | null>(null);
// Initialize Session
useEffect(() => {
const initSession = async () => {
try {
const headers: Record<string, string> = {};
if (sessionId) headers["x-session-id"] = sessionId;
const res = await fetch(`${API_URL}/api/session`, { headers });
const data = (await res.json()) as SessionData;
if (data.sessionId && data.sessionId !== sessionId) {
setSessionId(data.sessionId);
localStorage.setItem("downloader_session_id", data.sessionId);
}
setExpiresAt(data.expiresAt);
} catch (err) {
console.error("Failed to init session", err);
}
};
initSession();
}, [sessionId]);
// Poll Tasks
const refreshTasks = async () => {
if (!sessionId) return;
try {
const res = await fetch(`${API_URL}/api/tasks`, {
headers: { "x-session-id": sessionId },
});
if (res.ok) {
const data = await res.json();
setTasks(data);
}
} catch (err) {
console.error("Failed to fetch tasks", err);
}
};
useEffect(() => {
if (!sessionId) return;
// Initial fetch
refreshTasks();
// Poll every 2 seconds
const interval = setInterval(refreshTasks, 2000);
return () => clearInterval(interval);
}, [sessionId]);
const queueDownload = async (url: string) => {
if (!sessionId) return;
try {
const res = await fetch(`${API_URL}/api/queue`, {
method: "POST",
headers: {
"Content-Type": "application/json",
"x-session-id": sessionId,
},
body: JSON.stringify({ url }),
});
if (!res.ok) throw new Error("Failed to queue download");
await refreshTasks(); // Immediate refresh
// Update expiration from action
// Ideally we should re-fetch /api/session here too, or just rely on the side-effect
const sessionRes = await fetch(`${API_URL}/api/session`, {
headers: { "x-session-id": sessionId }
});
const sessionData = await sessionRes.json();
setExpiresAt(sessionData.expiresAt);
} catch (err) {
console.error(err);
throw err;
}
};
return (
<SessionContext.Provider value={{ sessionId, tasks, expiresAt, queueDownload, refreshTasks }}>
{children}
</SessionContext.Provider>
);
}
export function useSession() {
const context = useContext(SessionContext);
if (!context) throw new Error("useSession must be used within SessionProvider");
return context;
}