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frontend/src/components/FilePreview.tsx
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frontend/src/components/FilePreview.tsx
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'use client';
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import { useState, useEffect } from 'react';
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import { motion, AnimatePresence } from 'framer-motion';
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import { X, Download, File, Image as ImageIcon, Film, Music, FileText, Code, Loader2 } from 'lucide-react';
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import api from '@/lib/api';
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interface FilePreviewProps {
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file: {
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name: string;
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path: string;
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size: number;
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mime_type: string;
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} | null;
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onClose: () => void;
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}
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export default function FilePreview({ file, onClose }: FilePreviewProps) {
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const [content, setContent] = useState<string | null>(null);
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const [loading, setLoading] = useState(false);
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const [error, setError] = useState<string | null>(null);
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useEffect(() => {
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function handleKeyDown(e: KeyboardEvent) {
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if (e.key === 'Escape') onClose();
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}
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if (file) {
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window.addEventListener('keydown', handleKeyDown);
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}
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return () => window.removeEventListener('keydown', handleKeyDown);
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}, [file, onClose]);
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useEffect(() => {
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if (!file) return;
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const type = getPreviewType(file);
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if (type === 'text' || type === 'code') {
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if (file.size > 2 * 1024 * 1024) { // 2MB limit for text preview
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setError('File is too large to preview. Please download it.');
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return;
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}
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setLoading(true);
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setError(null);
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fetch(api.getDownloadUrl(file.path))
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.then((res) => {
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if (!res.ok) throw new Error('Failed to load file content');
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return res.text();
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})
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.then((text) => setContent(text))
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.catch((err) => setError(err.message))
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.finally(() => setLoading(false));
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}
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}, [file]);
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if (!file) return null;
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const previewType = getPreviewType(file);
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const downloadUrl = api.getDownloadUrl(file.path);
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return (
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<AnimatePresence>
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<motion.div
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initial={{ opacity: 0 }}
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animate={{ opacity: 1 }}
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exit={{ opacity: 0 }}
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className="fixed inset-0 z-[100] flex items-center justify-center p-4 sm:p-8"
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style={{ backgroundColor: 'rgba(0, 0, 0, 0.8)', backdropFilter: 'blur(8px)' }}
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onClick={onClose}
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>
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<motion.div
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initial={{ scale: 0.95, opacity: 0, y: 20 }}
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animate={{ scale: 1, opacity: 1, y: 0 }}
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exit={{ scale: 0.95, opacity: 0, y: 20 }}
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onClick={(e) => e.stopPropagation()}
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className="relative flex flex-col w-full max-w-5xl h-full max-h-[90vh] rounded-2xl overflow-hidden shadow-2xl"
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style={{ backgroundColor: 'var(--color-bg-elevated)', border: '1px solid var(--color-border)' }}
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>
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{/* Header */}
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<div className="flex items-center justify-between px-4 py-3 border-b shrink-0" style={{ borderColor: 'var(--color-border-subtle)', backgroundColor: 'var(--color-bg-secondary)' }}>
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<div className="flex items-center gap-3 min-w-0">
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{getIcon(previewType)}
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<span className="font-medium truncate" style={{ color: 'var(--color-text-primary)' }} title={file.name}>
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{file.name}
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</span>
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<span className="text-xs px-2 py-1 rounded-md" style={{ backgroundColor: 'var(--color-bg-tertiary)', color: 'var(--color-text-tertiary)' }}>
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{formatSize(file.size)}
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</span>
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</div>
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<div className="flex items-center gap-2 shrink-0">
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<a
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href={downloadUrl}
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download={file.name}
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target="_blank"
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rel="noreferrer"
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className="p-2 rounded-lg transition-colors hover:bg-white/10"
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style={{ color: 'var(--color-text-secondary)' }}
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title="Download"
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>
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<Download className="w-5 h-5" />
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</a>
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<button
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onClick={onClose}
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className="p-2 rounded-lg transition-colors hover:bg-white/10"
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style={{ color: 'var(--color-text-secondary)' }}
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title="Close (Esc)"
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>
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<X className="w-5 h-5" />
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</button>
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</div>
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</div>
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{/* Content Area */}
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<div className="flex-1 overflow-auto flex items-center justify-center p-4 relative" style={{ backgroundColor: 'var(--color-bg-primary)' }}>
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{previewType === 'image' && (
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<img
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src={downloadUrl}
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alt={file.name}
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className="max-w-full max-h-full object-contain rounded-lg"
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/>
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)}
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{previewType === 'video' && (
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<video
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src={downloadUrl}
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controls
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autoPlay
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className="max-w-full max-h-full rounded-lg outline-none"
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/>
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)}
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{previewType === 'audio' && (
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<div className="w-full max-w-md p-6 rounded-xl text-center" style={{ backgroundColor: 'var(--color-bg-elevated)', border: '1px solid var(--color-border)' }}>
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<Music className="w-16 h-16 mx-auto mb-6" style={{ color: 'var(--color-accent)' }} />
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<h3 className="text-lg font-medium mb-4 truncate" style={{ color: 'var(--color-text-primary)' }}>{file.name}</h3>
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<audio src={downloadUrl} controls autoPlay className="w-full outline-none" />
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</div>
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)}
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{(previewType === 'text' || previewType === 'code') && (
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<div className="absolute inset-0 p-4">
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{loading ? (
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<div className="flex items-center justify-center h-full">
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<Loader2 className="w-8 h-8 animate-spin" style={{ color: 'var(--color-accent)' }} />
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</div>
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) : error ? (
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<div className="flex flex-col items-center justify-center h-full gap-2">
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<p style={{ color: 'var(--color-danger)' }}>{error}</p>
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<a
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href={downloadUrl}
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target="_blank"
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rel="noreferrer"
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className="px-4 py-2 mt-2 rounded-lg text-sm font-medium transition-opacity hover:opacity-90"
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style={{ backgroundColor: 'var(--color-accent)', color: 'white' }}
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>
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Download File
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</a>
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</div>
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) : (
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<pre
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className="w-full h-full p-4 overflow-auto text-sm rounded-lg"
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style={{
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fontFamily: 'var(--font-mono)',
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backgroundColor: 'var(--color-bg-secondary)',
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color: 'var(--color-text-primary)',
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border: '1px solid var(--color-border-subtle)',
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}}
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>
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{content}
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</pre>
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)}
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</div>
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)}
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{previewType === 'unsupported' && (
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<div className="flex flex-col items-center justify-center gap-4 text-center">
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<File className="w-16 h-16" style={{ color: 'var(--color-text-tertiary)' }} />
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<div>
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<h3 className="text-lg font-medium mb-1" style={{ color: 'var(--color-text-primary)' }}>No Preview Available</h3>
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<p className="text-sm" style={{ color: 'var(--color-text-secondary)' }}>This file type cannot be previewed in the browser.</p>
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</div>
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<a
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href={downloadUrl}
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target="_blank"
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rel="noreferrer"
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className="flex items-center gap-2 px-6 py-2.5 mt-2 rounded-xl text-sm font-medium transition-opacity hover:opacity-90"
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style={{ backgroundColor: 'var(--color-accent)', color: 'white', boxShadow: 'var(--shadow-glow)' }}
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>
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<Download className="w-4 h-4" />
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Download File
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</a>
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</div>
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)}
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</div>
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</motion.div>
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</motion.div>
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</AnimatePresence>
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);
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}
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// --- Helpers ---
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type PreviewType = 'image' | 'video' | 'audio' | 'text' | 'code' | 'unsupported';
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function getPreviewType(file: { name: string; mime_type: string }): PreviewType {
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const ext = file.name.split('.').pop()?.toLowerCase() || '';
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if (['jpg', 'jpeg', 'png', 'gif', 'webp', 'svg', 'bmp'].includes(ext)) return 'image';
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if (['mp4', 'webm', 'ogg'].includes(ext)) return 'video'; // Only browser-supported videos
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if (['mp3', 'wav', 'flac', 'm4a', 'aac'].includes(ext)) return 'audio';
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if (['txt', 'md', 'csv', 'json', 'log'].includes(ext)) return 'text';
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if (['js', 'ts', 'jsx', 'tsx', 'html', 'css', 'go', 'py', 'rs', 'c', 'cpp', 'java', 'sh', 'yml', 'yaml', 'xml'].includes(ext)) return 'code';
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if (file.mime_type.startsWith('image/')) return 'image';
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if (file.mime_type.startsWith('video/')) return 'video';
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if (file.mime_type.startsWith('audio/')) return 'audio';
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if (file.mime_type.startsWith('text/')) return 'text';
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return 'unsupported';
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}
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function getIcon(type: PreviewType) {
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const props = { className: "w-5 h-5", style: { color: 'var(--color-text-secondary)' } };
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switch (type) {
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case 'image': return <ImageIcon {...props} />;
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case 'video': return <Film {...props} />;
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case 'audio': return <Music {...props} />;
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case 'text': return <FileText {...props} />;
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case 'code': return <Code {...props} />;
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default: return <File {...props} />;
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}
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}
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function formatSize(bytes: number): string {
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if (bytes === 0) return '0 B';
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const units = ['B', 'KB', 'MB', 'GB', 'TB'];
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const i = Math.floor(Math.log(bytes) / Math.log(1024));
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return `${(bytes / Math.pow(1024, i)).toFixed(1)} ${units[i]}`;
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}
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