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Commentable.tsx
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Commentable.tsx
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'use client'
import 'dayjs/locale/zh-cn'
import { SignedIn, SignedOut, SignInButton, useUser } from '@clerk/nextjs'
import { clsxm } from '@zolplay/utils'
import dayjs from 'dayjs'
import relativeTime from 'dayjs/plugin/relativeTime'
import { AnimatePresence, motion } from 'framer-motion'
import Image from 'next/image'
import { usePathname } from 'next/navigation'
import React from 'react'
import { useMutation } from 'react-query'
import TextareaAutosize from 'react-textarea-autosize'
import { useSnapshot } from 'valtio'
import {
addComment,
blogPostState,
clearBlockFocus,
clearReply,
focusBlock,
replyTo,
} from '~/app/(main)/blog/blog-post.state'
import {
EyeCloseIcon,
EyeOpenIcon,
NewCommentIcon,
TiltedSendIcon,
UserArrowLeftIcon,
UTurnLeftIcon,
XIcon,
XSquareIcon,
} from '~/assets'
import { CommentMarkdown } from '~/components/CommentMarkdown'
import { RichLink } from '~/components/links/RichLink'
import { Button } from '~/components/ui/Button'
import { HoverCard } from '~/components/ui/HoverCard'
import { ElegantTooltip } from '~/components/ui/Tooltip'
import {
type CommentDto,
type PostIDLessCommentDto,
} from '~/db/dto/comment.dto'
import { url } from '~/lib'
import { parseDisplayName } from '~/lib/string'
dayjs.extend(relativeTime)
const MAX_COMMENT_LENGTH = 999
type CommentableProps = {
className?: string
blockId?: string
}
function Root({ className, blockId }: CommentableProps) {
const pathname = usePathname()
const { postId, comments, currentBlockId } = useSnapshot(blogPostState)
const { user: me } = useUser()
const [isCommenting, setIsCommenting] = React.useState(false)
const currentComments = React.useMemo(
() => comments.filter((c) => c.body.blockId === blockId),
[comments, blockId]
)
const top3Users = React.useMemo(() => {
if (currentComments.length === 0) {
return []
}
const users = new Set<PostIDLessCommentDto['userId']>()
const top3: PostIDLessCommentDto['userInfo'][] = []
for (const comment of currentComments) {
if (users.has(comment.userId)) {
continue
}
if (comment.userInfo.imageUrl) {
top3.push(comment.userInfo)
users.add(comment.userId)
}
if (top3.length >= 3) {
break
}
}
return top3
}, [currentComments])
const formRef = React.useRef<HTMLFormElement>(null)
const commentsRef = React.useRef<HTMLUListElement>(null)
const scrollToComment = React.useCallback((id: string) => {
setTimeout(() => {
if (commentsRef.current) {
commentsRef.current
.querySelector(`[data-commentid="${id}"]`)
?.scrollIntoView({
behavior: 'smooth',
})
}
}, 300)
}, [])
const { mutate: createComment, isLoading } = useMutation(
['comment', postId],
async (comment: string) => {
const res = await fetch(`/api/comments/${postId}`, {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify({
body: {
blockId,
text: comment,
} satisfies CommentDto['body'],
parentId: blogPostState.replyingTo?.id,
}),
})
const data: CommentDto = await res.json()
return data
},
{
onSuccess: (data) => {
addComment(data)
window.requestAnimationFrame(() => {
scrollToComment(data.id)
})
window.dispatchEvent(new CustomEvent('clear-comment'))
},
}
)
const onSubmit = React.useCallback(
(e?: React.FormEvent<HTMLFormElement> | string) => {
let comment = ''
if (typeof e === 'string') {
comment = e
} else {
e?.preventDefault()
const form = e?.currentTarget || formRef.current
if (form) {
const formData = new FormData(form)
comment = formData.get('comment') as string
}
}
if (
!comment ||
typeof comment !== 'string' ||
!comment.trim() ||
comment.length > MAX_COMMENT_LENGTH
) {
return
}
createComment(comment.trim())
},
[createComment]
)
const isMe = React.useCallback(
(comment: PostIDLessCommentDto) => comment.userId === me?.id,
[me?.id]
)
React.useEffect(() => {
if (!isCommenting) {
clearReply()
}
}, [isCommenting])
React.useEffect(() => {
const event = 'scroll-to-comment'
const handler = (e: Event) => {
if (e instanceof CustomEvent && typeof e.detail === 'string') {
scrollToComment(e.detail)
}
}
window.addEventListener(event, handler)
return () => {
window.removeEventListener(event, handler)
}
}, [scrollToComment])
const handleToggleCommenting = React.useCallback(() => {
if (isCommenting) {
clearBlockFocus()
} else {
focusBlock(blockId ?? null)
}
}, [blockId, isCommenting])
React.useEffect(() => {
setIsCommenting(currentBlockId === blockId)
}, [blockId, currentBlockId])
return (
<HoverCard.Root open={isCommenting}>
<AnimatePresence>
{top3Users.length > 0 && (
<motion.button
type="button"
className={clsxm(
'absolute -right-2 top-[4px] flex origin-top-right appearance-none flex-col items-center justify-end -space-y-1 md:right-[calc(100%+1.65rem)] md:w-16 md:flex-row md:-space-x-1.5 md:space-y-0',
className
)}
initial={{ opacity: 0, scale: 0.95 }}
animate={{ opacity: 1, scale: 1 }}
exit={{ opacity: 0, scale: 0.95 }}
onClick={handleToggleCommenting}
>
{top3Users.map((user, idx) => (
<Image
key={idx}
src={user.imageUrl ?? ''}
alt=""
width={20}
height={20}
unoptimized
className="pointer-events-none h-5 w-5 select-none rounded-full ring-2 ring-white dark:ring-zinc-800"
/>
))}
</motion.button>
)}
</AnimatePresence>
<HoverCard.Trigger asChild>
<button
type="button"
className={clsxm(
'absolute -right-1 top-[5px] flex h-full origin-top-right translate-x-1.5 scale-95 transform-gpu appearance-none items-start opacity-0 transition-all group-hover:translate-x-0 group-hover:scale-100 group-hover:opacity-100 md:right-[calc(100%+6px)]',
className
)}
onClick={handleToggleCommenting}
>
<NewCommentIcon className="pointer-events-none h-5 w-5 select-none rounded-xl bg-zinc-100 text-zinc-800 dark:bg-zinc-900 dark:text-zinc-300 md:rounded-none md:bg-transparent" />
</button>
</HoverCard.Trigger>
<AnimatePresence>
{isCommenting && (
<HoverCard.Portal forceMount>
<HoverCard.Content
side="top"
align="start"
className="relative"
asChild
>
<motion.div
key="new-comment-wrapper"
initial={{ opacity: 0, y: 10, scale: 0.96 }}
animate={{ opacity: 1, y: 0, scale: 1 }}
exit={{ opacity: 0, y: 10, scale: 0.96 }}
>
<button
type="button"
className="group absolute inset-x-0 -top-3 z-50 flex justify-center"
onClick={handleToggleCommenting}
>
<XIcon className="h-6 w-6 rounded-full border border-zinc-400/20 bg-white/95 p-1 text-zinc-500 backdrop-blur transition-all group-hover:w-12 group-hover:text-zinc-700 dark:border-zinc-500/30 dark:bg-zinc-800/95 dark:text-zinc-400 dark:group-hover:text-zinc-200" />
</button>
<main className="flex w-[clamp(140px,75vw,300px)] flex-col">
{currentComments.length > 0 && (
<header className="-mx-4 -mt-4 rounded-t-xl border-b border-zinc-400/20 bg-zinc-100/50 dark:border-zinc-300/10 dark:bg-black/20">
<ul
ref={commentsRef}
className="flex max-h-[50vh] w-full flex-col space-y-0.5 overflow-x-hidden overflow-y-scroll p-4 [-webkit-mask-image:linear-gradient(to_bottom,transparent_0%,black_28px,black_100%)]"
>
{currentComments.map((c) => (
<CommentItem key={c.id} {...c} isMe={isMe} />
))}
</ul>
</header>
)}
<form
className={clsxm(
'flex flex-col gap-2 pt-2 transition-opacity',
isLoading && 'pointer-events-none opacity-50'
)}
ref={formRef}
onSubmit={onSubmit}
>
<SignedIn>
<CommentTextarea
isLoading={isLoading}
onSubmit={onSubmit}
/>
</SignedIn>
<SignedOut>
<div className="flex justify-center">
<SignInButton
mode="modal"
redirectUrl={url(pathname).href}
>
<Button type="button">
<UserArrowLeftIcon className="mr-1 h-5 w-5" />
登录后参与讨论
</Button>
</SignInButton>
</div>
</SignedOut>
</form>
</main>
</motion.div>
</HoverCard.Content>
</HoverCard.Portal>
)}
</AnimatePresence>
</HoverCard.Root>
)
}
export const Commentable = React.memo(Root)
Commentable.displayName = 'Commentable'
Root.displayName = 'Commentable.Root'
function Comment({
isMe,
...c
}: PostIDLessCommentDto & {
isMe: (comment: PostIDLessCommentDto) => boolean
}) {
const isMyself = React.useMemo(() => isMe(c), [c, isMe])
const onClickReply = React.useCallback(() => {
replyTo(c)
}, [c])
const parentComment = React.useMemo(
() =>
c.parentId
? blogPostState.comments.find(({ id }) => id === c.parentId)
: null,
[c]
)
return (
<li data-commentid={c.id} data-parentid={parentComment?.id}>
<div
className={clsxm(
'flex w-full items-stretch gap-2',
isMyself ? 'flex-row-reverse' : 'flex-row'
)}
>
<div className="flex w-6 shrink-0 items-end">
<Image
src={c.userInfo.imageUrl ?? ''}
alt=""
className="h-6 w-6 select-none rounded-full"
width={24}
height={24}
unoptimized
/>
</div>
<div
className={clsxm(
'flex flex-1 flex-col',
isMyself ? 'items-end' : 'items-start'
)}
>
<span
className={clsxm(
'flex items-center gap-2 text-xs font-semibold text-zinc-800 dark:text-zinc-200',
isMyself && 'flex-row-reverse'
)}
>
{!isMyself && <span>{parseDisplayName(c.userInfo)}</span>}
<span className="inline-flex select-none text-[10px] font-medium opacity-40">
{dayjs(c.createdAt).locale('zh-cn').fromNow()}
</span>
</span>
<div
className={clsxm(
'comment__message group relative inline-block break-all rounded-xl px-2 py-1 text-sm text-zinc-800 dark:text-zinc-200',
isMyself
? 'rounded-br-sm bg-sky-300/40 dark:bg-sky-600/80'
: 'rounded-bl-sm bg-zinc-600/5 dark:bg-zinc-500/20'
)}
>
{!isMyself && (
<div className="absolute inset-y-0 -right-4 flex h-full translate-x-0.5 transform-gpu items-center opacity-0 transition-all group-hover:translate-x-0 group-hover:opacity-100">
<ElegantTooltip content="回复">
<motion.button
whileHover={{ scale: 1.05 }}
whileTap={{ scale: 0.96 }}
className="flex h-6 w-6 items-center justify-center rounded-full border border-zinc-200 bg-zinc-50 dark:border-zinc-700 dark:bg-zinc-800"
onClick={onClickReply}
>
<UTurnLeftIcon className="h-4 w-4" />
</motion.button>
</ElegantTooltip>
</div>
)}
{parentComment && (
<div
className={clsxm(
'border-l-2 pl-1.5 text-[12px] !leading-3',
isMyself
? 'border-zinc-500 text-zinc-600 dark:border-zinc-400 dark:text-zinc-300'
: 'border-zinc-500 text-zinc-600 dark:border-zinc-400 dark:text-zinc-300'
)}
role="button"
tabIndex={0}
onClick={() =>
window.dispatchEvent(
new CustomEvent('scroll-to-comment', {
detail: parentComment.id,
})
)
}
>
<span className="font-semibold">
{parseDisplayName(parentComment.userInfo)}
</span>
<span className="line-clamp-1 w-full max-w-[240px]">
{parentComment.body.text}
</span>
</div>
)}
<CommentMarkdown>{c.body.text}</CommentMarkdown>
</div>
</div>
</div>
</li>
)
}
const CommentItem = React.memo(Comment)
CommentItem.displayName = 'Commentable.CommentItem'
Comment.displayName = 'Commentable.Comment'
type CommentTextareaProps = {
isLoading?: boolean
onSubmit?: (comment: string) => void
}
function CommentTextarea({ isLoading, onSubmit }: CommentTextareaProps) {
const { user: me } = useUser()
const textareaRef = React.useRef<HTMLTextAreaElement>(null)
const [comment, setComment] = React.useState('')
const [isPreviewing, setIsPreviewing] = React.useState(false)
const { replyingTo } = useSnapshot(blogPostState)
const onClickSend = React.useCallback(
(e: React.MouseEvent) => {
e.preventDefault()
onSubmit?.(comment)
},
[onSubmit, comment]
)
const onKeydown = React.useCallback(
(e: React.KeyboardEvent<HTMLTextAreaElement>) => {
if (e.key === 'Enter' && e.metaKey) {
e.preventDefault()
onSubmit?.(comment)
}
},
[onSubmit, comment]
)
React.useEffect(() => {
const handler = () => {
setComment('')
setIsPreviewing(false)
clearReply()
}
window.addEventListener('clear-comment', handler)
return () => {
window.removeEventListener('clear-comment', handler)
}
}, [])
React.useEffect(() => {
if (replyingTo) {
textareaRef.current?.focus()
}
}, [replyingTo])
return (
<>
<AnimatePresence>
{replyingTo && (
<motion.header
className="flex w-full items-stretch justify-between gap-1.5"
initial={{ opacity: 0, height: 0 }}
animate={{ opacity: 1, height: 'auto' }}
exit={{ opacity: 0, height: 0 }}
>
<div className="flex items-center">
<UTurnLeftIcon className="h-4 w-4 text-zinc-500" />
</div>
<span className="line-clamp-1 flex-1 shrink-0 border-l-2 border-zinc-300 pl-1.5 text-xs text-zinc-600 dark:border-zinc-600 dark:text-zinc-400">
{replyingTo.body.text}
</span>
<div className="flex items-center">
<motion.button
whileHover={{ scale: 1.05 }}
whileTap={{ scale: 0.96 }}
onClick={clearReply}
>
<XSquareIcon className="h-5 w-5" />
</motion.button>
</div>
</motion.header>
)}
</AnimatePresence>
<div className="flex w-full items-end pb-1">
{isPreviewing ? (
<div className="comment__message flex-1 shrink-0 break-all px-2 py-1 text-sm text-zinc-800 dark:text-zinc-200">
<CommentMarkdown>{comment}</CommentMarkdown>
</div>
) : (
<TextareaAutosize
ref={textareaRef}
id="comment"
name="comment"
className="block flex-1 shrink-0 resize-none border-0 bg-transparent p-0 text-sm leading-6 text-zinc-800 placeholder-zinc-400 outline-none focus:outline-none focus:ring-0 dark:text-zinc-200 dark:placeholder-zinc-500"
placeholder={
replyingTo
? `回复 ${parseDisplayName(replyingTo.userInfo)} 的评论...`
: '留下你的评论吧...'
}
value={comment}
onChange={(e) => setComment(e.target.value)}
onKeyDown={onKeydown}
disabled={isLoading}
maxRows={8}
autoFocus
/>
)}
<Image
src={me?.imageUrl ?? ''}
alt=""
className="h-6 w-6 select-none rounded-full"
width={24}
height={24}
unoptimized
/>
</div>
<footer className="flex h-5 w-full items-center justify-between">
<span
className={clsxm(
'flex-1 shrink-0 select-none text-[10px] text-zinc-500 transition-opacity',
comment.length > 0 ? 'opacity-100' : 'opacity-0'
)}
>
支持 <b>Markdown</b> 与{' '}
<RichLink
favicon={false}
href="https://docs.github.com/zh/get-started/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax"
className="font-bold hover:underline"
>
GFM
</RichLink>
</span>
<AnimatePresence>
{comment.length > 0 && (
<motion.aside
key="send-button-wrapper"
initial={{ opacity: 0, scale: 0.96, y: 8 }}
animate={{ opacity: 1, scale: 1, y: 0 }}
exit={{ opacity: 0, scale: 0.98, y: 8 }}
className="flex select-none items-center gap-2.5"
>
<span
className={clsxm(
'font-mono text-[10px]',
comment.length > MAX_COMMENT_LENGTH
? 'text-red-500'
: 'text-zinc-500'
)}
>
{comment.length}/{MAX_COMMENT_LENGTH}
</span>
<ElegantTooltip content={isPreviewing ? '关闭预览' : '预览一下'}>
<motion.button
className="appearance-none"
whileHover={{ scale: 1.05 }}
whileTap={{ scale: 0.95 }}
type="button"
disabled={isLoading}
onClick={() => setIsPreviewing((prev) => !prev)}
>
{isPreviewing ? (
<EyeCloseIcon className="h-5 w-5 text-zinc-800 dark:text-zinc-200" />
) : (
<EyeOpenIcon className="h-5 w-5 text-zinc-800 dark:text-zinc-200" />
)}
</motion.button>
</ElegantTooltip>
<ElegantTooltip content="发送">
<motion.button
className="appearance-none"
whileHover={{ scale: 1.05 }}
whileTap={{ scale: 0.95 }}
type="submit"
disabled={isLoading}
onClick={onClickSend}
>
<TiltedSendIcon className="h-5 w-5 text-zinc-800 dark:text-zinc-200" />
</motion.button>
</ElegantTooltip>
</motion.aside>
)}
</AnimatePresence>
</footer>
</>
)
}