File size: 4,784 Bytes
d02c2a6 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 | import React, { useRef, useEffect, useState, ReactNode } from 'react';
import { isVideo, isAudio } from '@/utils/basic';
interface SampleImageCardProps {
imageUrl: string;
alt: string;
numSamples: number;
sampleImages: string[];
children?: ReactNode;
className?: string;
onDelete?: () => void;
onClick?: () => void;
/** pass your scroll container element (e.g. containerRef.current) */
observerRoot?: Element | null;
/** optional: tweak pre-load buffer */
rootMargin?: string; // default '200px 0px'
}
const SampleImageCard: React.FC<SampleImageCardProps> = ({
imageUrl,
alt,
numSamples,
sampleImages,
children,
className = '',
onClick = () => {},
observerRoot = null,
rootMargin = '200px 0px',
}) => {
const cardRef = useRef<HTMLDivElement>(null);
const videoRef = useRef<HTMLVideoElement | null>(null);
const [isVisible, setIsVisible] = useState(false);
const [loaded, setLoaded] = useState(false);
const [blobUrl, setBlobUrl] = useState<string | null>(null);
const isItAudio = isAudio(imageUrl);
const isItVideo = isVideo(imageUrl);
const isImageType = !isItAudio && !isItVideo;
// Observe both enter and exit
useEffect(() => {
const el = cardRef.current;
if (!el) return;
const observer = new IntersectionObserver(
entries => {
for (const entry of entries) {
if (entry.target === el) {
setIsVisible(entry.isIntersecting);
}
}
},
{
root: observerRoot ?? null,
threshold: 0.01,
rootMargin,
},
);
observer.observe(el);
return () => observer.disconnect();
}, [observerRoot, rootMargin]);
// Drive image loads through fetch + AbortController so scrolling past actually
// cancels in-flight requests (browsers don't reliably cancel <img> fetches when
// the element unmounts). A short debounce skips requests entirely during fast
// scrolls where the card is only briefly visible.
useEffect(() => {
if (!isImageType) return;
if (!isVisible) return;
const controller = new AbortController();
let cancelled = false;
let objectUrl: string | null = null;
const timer = window.setTimeout(() => {
fetch(`/api/img/${encodeURIComponent(imageUrl)}`, { signal: controller.signal })
.then(r => {
if (!r.ok) throw new Error(`HTTP ${r.status}`);
return r.blob();
})
.then(blob => {
if (cancelled) return;
objectUrl = URL.createObjectURL(blob);
setBlobUrl(objectUrl);
setLoaded(true);
})
.catch(err => {
if (err?.name !== 'AbortError') console.error('Sample image fetch failed:', err);
});
}, 80);
return () => {
cancelled = true;
clearTimeout(timer);
controller.abort();
if (objectUrl) URL.revokeObjectURL(objectUrl);
setBlobUrl(null);
setLoaded(false);
};
}, [isVisible, isImageType, imageUrl]);
return (
<div className={`flex flex-col ${className}`}>
<div ref={cardRef} className="relative w-full cursor-pointer" style={{ paddingBottom: '100%' }} onClick={onClick}>
<div
className={`absolute inset-0 rounded-t-lg shadow-md bg-gray-900 ${
isVisible && isImageType && !loaded ? 'animate-pulse' : ''
}`}
>
{isVisible ? (
isItAudio ? (
<div className="w-full h-full flex items-center justify-center bg-gray-900">
<img
src={`/api/audio/art/${encodeURIComponent(imageUrl)}`}
alt={alt}
className="w-full h-full object-cover"
onError={e => {
(e.target as HTMLImageElement).style.display = 'none';
}}
/>
</div>
) : isItVideo ? (
<video
ref={videoRef}
src={`/api/img/${encodeURIComponent(imageUrl)}`}
className="w-full h-full object-cover"
preload="none"
playsInline
muted
loop
autoPlay
controls={false}
/>
) : blobUrl ? (
<img
src={blobUrl}
alt={alt}
decoding="async"
className={`w-full h-full object-cover transition-opacity duration-300 ${
loaded ? 'opacity-100' : 'opacity-0'
}`}
/>
) : null
) : null}
{children && isVisible && <div className="absolute inset-0 flex items-center justify-center">{children}</div>}
</div>
</div>
</div>
);
};
export default SampleImageCard;
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