init
This commit is contained in:
@@ -0,0 +1,195 @@
|
||||
"use client";
|
||||
import { useCallback, useEffect, useMemo, useRef, useState } from 'react';
|
||||
import Link from 'next/link';
|
||||
import HoverVideo from './HoverVideo';
|
||||
import { ThumbsUp } from 'lucide-react';
|
||||
import type { FeedItem, FeedResponse } from '@/app/types/feed';
|
||||
|
||||
type Props = {
|
||||
initialItems: FeedItem[];
|
||||
initialCursor: string | null;
|
||||
};
|
||||
|
||||
export default function FeedMasonry({ initialItems, initialCursor }: Props) {
|
||||
// 哨兵与容器
|
||||
const [cursor, setCursor] = useState<string | null>(initialCursor);
|
||||
const [loading, setLoading] = useState(false);
|
||||
const [ended, setEnded] = useState(!initialCursor);
|
||||
|
||||
const sentinelRef = useRef<HTMLDivElement | null>(null);
|
||||
const containerRef = useRef<HTMLDivElement | null>(null);
|
||||
|
||||
// 响应式列数：<640:1, >=640:2, >=1024:3, >=1280:4
|
||||
const getColumnCount = useCallback(() => {
|
||||
if (typeof window === 'undefined') return 1;
|
||||
const w = window.innerWidth;
|
||||
if (w >= 1280) return 4; // xl
|
||||
if (w >= 1024) return 3; // lg
|
||||
if (w >= 640) return 2; // sm
|
||||
return 1;
|
||||
}, []);
|
||||
const [columnCount, setColumnCount] = useState<number>(getColumnCount());
|
||||
|
||||
useEffect(() => {
|
||||
const onResize = () => setColumnCount(getColumnCount());
|
||||
window.addEventListener('resize', onResize);
|
||||
return () => window.removeEventListener('resize', onResize);
|
||||
}, [getColumnCount]);
|
||||
|
||||
// 估算卡片高度（用于分配到“最短列”）
|
||||
const estimateItemHeight = useCallback((item: FeedItem, colWidth: number) => {
|
||||
// 媒体区域高度
|
||||
let mediaH = 200; // fallback
|
||||
if (item.width && item.height) {
|
||||
mediaH = Math.max(80, (Number(item.height) / Number(item.width)) * colWidth);
|
||||
} else if (item.type === 'video') {
|
||||
mediaH = (9 / 16) * colWidth; // 常见视频比例
|
||||
}
|
||||
// 文本 + 作者栏的高度粗估
|
||||
const textH = 48; // 标题+标签区域
|
||||
const authorH = 48; // 作者行
|
||||
const gap = 16; // 卡片内边距/间隙
|
||||
return mediaH + textH + authorH + gap;
|
||||
}, []);
|
||||
|
||||
// 维护列数据与列高
|
||||
const [columns, setColumns] = useState<FeedItem[][]>(() => {
|
||||
const cols: FeedItem[][] = Array.from({ length: columnCount }, () => []);
|
||||
return cols;
|
||||
});
|
||||
const [colHeights, setColHeights] = useState<number[]>(() => Array.from({ length: columnCount }, () => 0));
|
||||
|
||||
// 初始化与当列数变化时重排
|
||||
useEffect(() => {
|
||||
const containerWidth = containerRef.current?.clientWidth ?? 0;
|
||||
const colWidth = columnCount > 0 ? containerWidth / columnCount : containerWidth;
|
||||
// 用 initialItems 重排
|
||||
const newCols: FeedItem[][] = Array.from({ length: columnCount }, () => []);
|
||||
const newHeights: number[] = Array.from({ length: columnCount }, () => 0);
|
||||
for (const item of initialItems) {
|
||||
// 找最短列
|
||||
let minIdx = 0;
|
||||
for (let i = 1; i < columnCount; i++) {
|
||||
if (newHeights[i] < newHeights[minIdx]) minIdx = i;
|
||||
}
|
||||
newCols[minIdx].push(item);
|
||||
newHeights[minIdx] += estimateItemHeight(item, colWidth || 300);
|
||||
}
|
||||
setColumns(newCols);
|
||||
setColHeights(newHeights);
|
||||
// eslint-disable-next-line react-hooks/exhaustive-deps
|
||||
}, [columnCount]);
|
||||
|
||||
const fetchMore = useCallback(async () => {
|
||||
if (loading || ended) return;
|
||||
setLoading(true);
|
||||
try {
|
||||
const params = new URLSearchParams();
|
||||
if (cursor) params.set('before', cursor);
|
||||
params.set('limit', '24');
|
||||
const res = await fetch(`/api/feed?${params.toString()}`, { cache: 'no-store' });
|
||||
if (!res.ok) throw new Error(`HTTP ${res.status}`);
|
||||
const data: FeedResponse = await res.json();
|
||||
// 将新数据按最短列分配
|
||||
setColumns((prevCols) => {
|
||||
const containerWidth = containerRef.current?.clientWidth ?? 0;
|
||||
const colWidth = columnCount > 0 ? containerWidth / columnCount : containerWidth;
|
||||
const cols = prevCols.map((c) => [...c]);
|
||||
const heights = [...colHeights];
|
||||
for (const item of data.items) {
|
||||
// 找当前最短列
|
||||
let minIdx = 0;
|
||||
for (let i = 1; i < columnCount; i++) {
|
||||
if (heights[i] < heights[minIdx]) minIdx = i;
|
||||
}
|
||||
cols[minIdx].push(item);
|
||||
heights[minIdx] += estimateItemHeight(item, colWidth || 300);
|
||||
}
|
||||
setColHeights(heights);
|
||||
return cols;
|
||||
});
|
||||
setCursor(data.nextCursor);
|
||||
if (!data.nextCursor || data.items.length === 0) setEnded(true);
|
||||
} catch (e) {
|
||||
console.error('fetch more feed failed', e);
|
||||
// 失败也不要死循环
|
||||
setEnded(true);
|
||||
} finally {
|
||||
setLoading(false);
|
||||
}
|
||||
}, [cursor, ended, loading, columnCount, colHeights, estimateItemHeight]);
|
||||
|
||||
useEffect(() => {
|
||||
const el = sentinelRef.current;
|
||||
if (!el) return;
|
||||
const io = new IntersectionObserver((entries) => {
|
||||
const entry = entries[0];
|
||||
if (entry.isIntersecting) {
|
||||
fetchMore();
|
||||
}
|
||||
}, { rootMargin: '800px 0px 800px 0px' });
|
||||
io.observe(el);
|
||||
return () => io.disconnect();
|
||||
}, [fetchMore]);
|
||||
|
||||
const renderCard = useCallback((item: FeedItem) => (
|
||||
<Link key={item.aweme_id} href={`/aweme/${item.aweme_id}`} className="mb-4 block group">
|
||||
<article className="relative overflow-hidden rounded-2xl shadow-sm ring-1 ring-black/5 bg-white/80 dark:bg-zinc-900/60 backdrop-blur-sm transition-transform duration-300 group-hover:-translate-y-1">
|
||||
<div
|
||||
className="relative w-full"
|
||||
style={{ aspectRatio: `${(item.width && item.height) ? `${item.width}/${item.height}` : ''}` as any }}
|
||||
>
|
||||
{item.type === 'video' ? (
|
||||
<HoverVideo
|
||||
videoUrl={(item as any).video_url}
|
||||
coverUrl={item.cover_url}
|
||||
className="absolute inset-0 w-full h-full"
|
||||
/>
|
||||
) : (
|
||||
<img
|
||||
loading="lazy"
|
||||
src={item.cover_url || '/placeholder.svg'}
|
||||
alt={item.desc?.slice(0, 20) || 'image'}
|
||||
className="absolute inset-0 w-full h-full object-cover"
|
||||
/>
|
||||
)}
|
||||
<div className="pointer-events-none absolute inset-0 bg-gradient-to-t from-black/50 via-black/0 to-black/0 opacity-70" />
|
||||
<div className="absolute left-3 bottom-3 right-3 flex items-end justify-between gap-3">
|
||||
<p className="text-white/95 text-sm leading-tight line-clamp-2 drop-shadow">
|
||||
{item.desc}
|
||||
</p>
|
||||
<span className="shrink-0 inline-flex items-center gap-2 rounded-full bg-white/85 px-2 py-1 text-xs text-zinc-800">
|
||||
{item.type === 'video' ? '视频' : '图文'}
|
||||
</span>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
<div className="flex items-center gap-2 p-3">
|
||||
<div className="size-6 rounded-full overflow-hidden bg-zinc-200">
|
||||
{item.author.avatar_url ? (
|
||||
<img src={item.author.avatar_url} alt="avatar" className="w-full h-full object-cover" />
|
||||
) : null}
|
||||
</div>
|
||||
<span className="text-sm text-zinc-700 dark:text-zinc-300 truncate">{item.author.nickname}</span>
|
||||
<span className="ml-auto text-sm text-zinc-700 dark:text-zinc-300">{item.likes} </span><ThumbsUp size={16} style={{ color: 'var(--color-zinc-700)' }} />
|
||||
</div>
|
||||
</article>
|
||||
</Link>
|
||||
), []);
|
||||
|
||||
return (
|
||||
<>
|
||||
{/* Masonry（按列渲染，动态分配到最短列） */}
|
||||
<div ref={containerRef} className="grid gap-4" style={{ gridTemplateColumns: `repeat(${columnCount}, minmax(0, 1fr))` }}>
|
||||
{columns.map((col, idx) => (
|
||||
<div key={idx} className="flex flex-col">
|
||||
{col.map((item) => renderCard(item))}
|
||||
</div>
|
||||
))}
|
||||
</div>
|
||||
<div ref={sentinelRef} className="h-10 flex items-center justify-center text-sm text-zinc-500">
|
||||
{ended ? '没有更多了' : (loading ? '加载中…' : '下拉加载更多')}
|
||||
</div>
|
||||
</>
|
||||
);
|
||||
}
|
||||
Reference in New Issue
Block a user