【再掲】feat: D & D による上位タグ設定（#184） (#211)

#184 修正

Merge branch 'main' into feature/184

Merge branch 'main' into feature/184

Merge branch 'main' into feature/184

Merge branch 'main' into feature/184

Merge remote-tracking branch 'origin/main' into feature/184

Merge branch 'main' into feature/184

Merge branch 'main' into feature/184

Merge branch 'main' into feature/184

Merge branch 'main' into feature/184

Merge branch 'main' into feature/184

Merge branch 'main' into feature/184

Merge remote-tracking branch 'origin/main' into feature/184

Merge branch 'main' into feature/184

Merge remote-tracking branch 'origin/main' into feature/184

Merge remote-tracking branch 'origin/main' into feature/184

Merge branch 'main' into feature/184

Merge branch 'main' into feature/184

#184

#184

#184

#184

#184

#184

Co-authored-by: miteruzo <miteruzo@naver.com>
Reviewed-on: #211

frontend/src/components/DraggableDroppableTagRow.tsx

@@ -0,0 +1,93 @@
+import { useDraggable, useDroppable } from '@dnd-kit/core'
+import { CSS } from '@dnd-kit/utilities'
+import { useRef } from 'react'
+
+import TagLink from '@/components/TagLink'
+import { cn } from '@/lib/utils'
+
+import type { CSSProperties, FC, MutableRefObject } from 'react'
+
+import type { Tag } from '@/types'
+
+type Props = {
+    tag:              Tag
+    nestLevel:        number
+    pathKey:          string
+    parentTagId?:     number
+    suppressClickRef: MutableRefObject<boolean> }
+
+
+export default (({ tag, nestLevel, pathKey, parentTagId, suppressClickRef }: Props) => {
+  const dndId = `tag-node:${ pathKey }`
+
+  const downPosRef = useRef<{ x: number; y: number } | null> (null)
+  const armedRef = useRef (false)
+
+  const armEatNextClick = () => {
+    if (armedRef.current)
+      return
+
+    armedRef.current = true
+    suppressClickRef.current = true
+
+    const handler = (ev: MouseEvent) => {
+      ev.preventDefault ()
+      ev.stopPropagation ()
+      armedRef.current = false
+      suppressClickRef.current = false
+    }
+
+    addEventListener ('click', handler, { capture: true, once: true })
+  }
+
+  const { attributes,
+	  listeners,
+	  setNodeRef: setDragRef,
+	  transform,
+	  isDragging: dragging } = useDraggable ({ id:    dndId,
+						   data:  { kind:   'tag',
+							    tagId:  tag.id,
+							    parentTagId } })
+
+  const { setNodeRef: setDropRef, isOver: over } = useDroppable ({
+      id:   dndId,
+      data: { kind: 'tag', tagId: tag.id } })
+
+  const style: CSSProperties = { transform:   CSS.Translate.toString (transform),
+				 visibility:  dragging ? 'hidden' : 'visible' }
+
+  return (
+      <div
+	  onPointerDownCapture={e => {
+	    downPosRef.current = { x: e.clientX, y: e.clientY }
+	  }}
+	  onPointerMoveCapture={e => {
+	    const p = downPosRef.current
+	    if (!(p))
+	      return
+	    const dx = e.clientX - p.x
+	    const dy = e.clientY - p.y
+	    if (dx * dx + dy * dy >= 9)
+	      armEatNextClick ()
+	  }}
+	  onPointerUpCapture={() => {
+	    downPosRef.current = null
+	  }}
+	  onClickCapture={e => {
+	    if (suppressClickRef.current)
+	      {
+		e.preventDefault ()
+		e.stopPropagation ()
+	      }
+	  }}
+	  ref={node => {
+	    setDragRef (node)
+	    setDropRef (node)
+	  }}
+	  style={style}
+	  className={cn ('rounded select-none', over && 'ring-2 ring-offset-2')}
+	  {...attributes}
+	  {...listeners}>
+	<TagLink tag={tag} nestLevel={nestLevel}/>
+      </div>)
+}) satisfies FC<Props>

frontend/src/components/TagDetailSidebar.tsx

@@ -1,15 +1,29 @@
+import { DndContext,
+	 DragOverlay,
+	 MouseSensor,
+	 TouchSensor,
+	 useDroppable,
+	 useSensor,
+	 useSensors } from '@dnd-kit/core'
+import { restrictToWindowEdges } from '@dnd-kit/modifiers'
+import axios from 'axios'
+import toCamel from 'camelcase-keys'
 import { AnimatePresence, motion } from 'framer-motion'
-import { useEffect, useState } from 'react'
+import { useEffect, useRef, useState } from 'react'
 import { Link } from 'react-router-dom'
 
+import DraggableDroppableTagRow from '@/components/DraggableDroppableTagRow'
 import TagLink from '@/components/TagLink'
 import TagSearch from '@/components/TagSearch'
 import SectionTitle from '@/components/common/SectionTitle'
 import SubsectionTitle from '@/components/common/SubsectionTitle'
 import SidebarComponent from '@/components/layout/SidebarComponent'
+import { toast } from '@/components/ui/use-toast'
+import { API_BASE_URL } from '@/config'
 import { CATEGORIES } from '@/consts'
 
-import type { FC, ReactNode } from 'react'
+import type { DragEndEvent } from '@dnd-kit/core'
+import type { FC, MutableRefObject, ReactNode } from 'react'
 
 import type { Category, Post, Tag } from '@/types'
 
@@ -17,9 +31,11 @@ type TagByCategory = { [key in Category]: Tag[] }
 
 
 const renderTagTree = (
-    tag:        Tag,
-    nestLevel:  number,
-    path:       string,
+    tag:              Tag,
+    nestLevel:        number,
+    path:             string,
+    suppressClickRef: MutableRefObject<boolean>,
+    parentTagId?:     number,
 ): ReactNode[] => {
   const key = `${ path }-${ tag.id }`
 
@@ -29,14 +45,109 @@ const renderTagTree = (
 	  layout
 	  transition={{ duration: .2, ease: 'easeOut' }}
 	  className="mb-1">
-	<TagLink tag={tag} nestLevel={nestLevel}/>
+	<DraggableDroppableTagRow
+	    tag={tag}
+	    nestLevel={nestLevel}
+	    pathKey={key}
+	    parentTagId={parentTagId}
+	    suppressClickRef={suppressClickRef}/>
       </motion.li>)
 
-  return [self,
-	  ...((tag.children
-	       ?.sort ((a, b) => a.name < b.name ? -1 : 1)
-	       .flatMap (child => renderTagTree (child, nestLevel + 1, key)))
-	      ?? [])]
+  return [
+      self,
+      ...((tag.children
+	   ?.sort ((a, b) => a.name < b.name ? -1 : 1)
+	   .flatMap (child => renderTagTree (child, nestLevel + 1, key, suppressClickRef, tag.id)))
+	  ?? [])]
+}
+
+
+const isDescendant = (
+    root:     Tag,
+    targetId: number,
+): boolean => {
+  if (!(root.children))
+    return false
+
+  for (const c of root.children)
+    {
+      if (c.id === targetId)
+	return true
+      if (isDescendant (c, targetId))
+	return true
+    }
+
+  return false
+}
+
+
+const findTag = (
+    byCat:  TagByCategory,
+    id:     number,
+): Tag | undefined => {
+  const walk = (nodes: Tag[]): Tag | undefined => {
+    for (const t of nodes)
+      {
+	if (t.id === id)
+	  return t
+
+	const found = t.children ? walk (t.children) : undefined
+	if (found)
+	  return found
+      }
+
+    return undefined
+  }
+
+  for (const cat of Object.keys (byCat) as (keyof typeof byCat)[])
+    {
+      const found = walk (byCat[cat] ?? [])
+      if (found)
+	return found
+    }
+
+  return undefined
+}
+
+
+const buildTagByCategory = (post: Post): TagByCategory => {
+  const tagsTmp = { } as TagByCategory
+
+  for (const tag of post.tags)
+    {
+      if (!(tag.category in tagsTmp))
+	tagsTmp[tag.category] = []
+
+      tagsTmp[tag.category].push (tag)
+    }
+
+  for (const cat of Object.keys (tagsTmp) as (keyof typeof tagsTmp)[])
+    tagsTmp[cat].sort ((a, b) => a.name < b.name ? -1 : 1)
+
+  return tagsTmp
+}
+
+
+const changeCategory = async (
+    tagId:    number,
+    category: Category,
+): Promise<void> => {
+  await axios.patch (
+      `${ API_BASE_URL }/tags/${ tagId }`,
+      { category },
+      { headers: { 'X-Transfer-Code': localStorage.getItem ('user_code') ?? '' } })
+}
+
+
+const DropSlot = ({ cat }: { cat: Category }) => {
+  const { setNodeRef, isOver: over } = useDroppable ({
+      id:   `slot:${ cat }`,
+      data: { kind: 'slot', cat } })
+
+  return (
+      <li ref={setNodeRef} className="h-1">
+	{over && <div className="h-0.5 w-full rounded bg-sky-400"/>}
+      </li>)
 }
 
 
@@ -44,8 +155,126 @@ type Props = { post: Post | null }
 
 
 export default (({ post }: Props) => {
+  const [activeTagId, setActiveTagId] = useState<number | null> (null)
+  const [dragging, setDragging] = useState (false)
+  const [saving, setSaving] = useState (false)
   const [tags, setTags] = useState ({ } as TagByCategory)
 
+  const suppressClickRef = useRef (false)
+
+  const sensors = useSensors (
+      useSensor (MouseSensor, { activationConstraint: { distance: 6 } }),
+      useSensor (TouchSensor, { activationConstraint: { delay: 250, tolerance: 8 } }))
+
+  const reloadTags = async (): Promise<void> => {
+    if (!(post))
+      return
+
+    const res = await axios.get (
+	`${ API_BASE_URL }/posts/${ post.id }`,
+	{ headers: { 'X-Transfer-Code': localStorage.getItem ('user_code') ?? '' } })
+    const data = toCamel (res.data as any, { deep: true }) as Post
+
+    setTags (buildTagByCategory (data))
+  }
+
+  const onDragEnd = async (e: DragEndEvent) => {
+    if (saving)
+      return
+
+    const activeKind = e.active.data.current?.kind
+    if (activeKind !== 'tag')
+      return
+
+    const childId: number | undefined = e.active.data.current?.tagId
+    const fromParentId: number | undefined = e.active.data.current?.parentTagId
+
+    const overKind = e.over?.data.current?.kind
+
+    if (childId == null || !(overKind))
+      return
+
+    const child = findTag (tags, childId)
+
+    try
+    {
+      setSaving (true)
+
+      switch (overKind)
+      {
+      case 'tag':
+	{
+	  const parentId: number | undefined = e.over?.data.current?.tagId
+	  if (parentId == null || childId === parentId)
+	    return
+
+	  const parent = findTag (tags, parentId)
+
+	  if (!(child)
+	      || !(parent)
+	      || isDescendant (child, parentId))
+	    return
+
+	  if (fromParentId != null)
+	    {
+	      await axios.delete (
+		  `${ API_BASE_URL }/tags/${ fromParentId }/children/${ childId }`,
+		  { headers: { 'X-Transfer-Code': localStorage.getItem ('user_code') ?? '' } })
+	    }
+
+	  await axios.post (
+	      `${ API_BASE_URL }/tags/${ parentId }/children/${ childId }`,
+	      { },
+	      { headers: { 'X-Transfer-Code': localStorage.getItem ('user_code') ?? '' } })
+
+	  await reloadTags ()
+	  toast ({
+	      title: '上位タグ対応追加',
+	      description: `《${ child?.name }》を《${ parent?.name }》の子タグに設定しました．` })
+
+	  break
+	}
+
+      case 'slot':
+	{
+	  const cat: Category | undefined = e.over?.data.current?.cat
+	  if (!(cat) || !(child))
+	    return
+
+	  if (child.category !== cat)
+	    await changeCategory (childId, cat)
+
+	  if (fromParentId != null)
+	    {
+	      await axios.delete (
+		  `${ API_BASE_URL }/tags/${ fromParentId }/children/${ childId }`,
+		  { headers: { 'X-Transfer-Code': localStorage.getItem ('user_code') ?? '' } })
+	    }
+
+	  const fromParent = fromParentId == null ? null : findTag (tags, fromParentId)
+
+	  await reloadTags ()
+	  toast ({
+	      title: '上位タグ対応解除',
+	      description: (
+		  fromParent
+		  ? `《${ child.name }》を《${ fromParent.name }》の子タグから外しました．`
+		  : `《${ child.name }》のカテゴリを変更しました．`) })
+
+	  break
+	}
+      }
+    }
+    catch
+    {
+      toast ({ title: '上位タグ対応失敗', description: '独裁者である必要があります．' })
+    }
+    finally
+    {
+      setSaving (false)
+    }
+  }
+
   const categoryNames: Record<Category, string> = {
       deerjikist: 'ニジラー',
       meme:       '原作・ネタ元・ミーム等',
@@ -77,63 +306,103 @@ export default (({ post }: Props) => {
   return (
       <SidebarComponent>
 	<TagSearch/>
-	<motion.div key={post?.id ?? 0} layout>
-	  {CATEGORIES.map ((cat: Category) => cat in tags && (
-	      <motion.div layout className="my-3" key={cat}>
-		<SubsectionTitle>{categoryNames[cat]}</SubsectionTitle>
+	<DndContext
+	    sensors={sensors}
+	    onDragStart={e => {
+	      if (e.active.data.current?.kind === 'tag')
+		setActiveTagId (e.active.data.current?.tagId ?? null)
+	      setDragging (true)
+	      suppressClickRef.current = true
+	      document.body.style.userSelect = 'none'
+	      getSelection?.()?.removeAllRanges?.()
+	      addEventListener ('click', e => {
+		e.preventDefault ()
+		e.stopPropagation ()
+		suppressClickRef.current = false
+	      }, { capture: true, once: true })
+	    }}
+	    onDragCancel={() => {
+	      setActiveTagId (null)
+	      setDragging (false)
+	      document.body.style.userSelect = ''
+	      suppressClickRef.current = false
+	    }}
+	    onDragEnd={async e => {
+	      setActiveTagId (null)
+	      setDragging (false)
+	      await onDragEnd (e)
+	      document.body.style.userSelect = ''
+	    }}
+	    modifiers={[restrictToWindowEdges]}>
+	  <motion.div key={post?.id ?? 0} layout>
+	    {CATEGORIES.map ((cat: Category) => ((tags[cat] ?? []).length > 0 || dragging) && (
+		<motion.div layout className="my-3" key={cat}>
+		  <SubsectionTitle>{categoryNames[cat]}</SubsectionTitle>
 
-		<motion.ul layout>
-		  <AnimatePresence initial={false}>
-		    {tags[cat].map (tag => renderTagTree (tag, 0, `cat-${ cat }`))}
-		  </AnimatePresence>
-		</motion.ul>
-	      </motion.div>))}
-	  {post && (
-	      <div>
-		<SectionTitle>情報</SectionTitle>
-		<ul>
-		  <li>Id.: {post.id}</li>
-		  {/* TODO: uploadedUser の取得を対応したらコメント外す */}
-		  {/*
-		  <li>
-		    <>耕作者: </>
-		    {post.uploadedUser
-		     ? (
-			<Link to={`/users/${ post.uploadedUser.id }`}>
-			  {post.uploadedUser.name || '名もなきニジラー'}
-			</Link>)
-		     : 'bot操作'}
-		  </li>
-		  */}
-		  <li>耕作日時: {(new Date (post.createdAt)).toLocaleString ()}</li>
-		  <li>
-		    <>リンク: </>
-		    <a
-			className="break-all"
-			href={post.url}
-			target="_blank"
-			rel="noopener noreferrer nofollow">
-		      {post.url}
-		    </a>
-		  </li>
-		  <li>
-		    {/* TODO: 表示形式きしょすぎるので何とかする */}
-		    <>オリジナルの投稿日時: </>
-		    {!(post.originalCreatedFrom) && !(post.originalCreatedBefore)
-		     ? '不明'
-		     : (
-			<>
-			  {post.originalCreatedFrom
-			   && `${ (new Date (post.originalCreatedFrom)).toLocaleString () } 以降 `}
-			  {post.originalCreatedBefore
-			   && `${ (new Date (post.originalCreatedBefore)).toLocaleString () } より前`}
-			</>)}
-		  </li>
-		  <li>
-		    <Link to={`/posts/changes?id=${ post.id }`}>履歴</Link>
-		  </li>
-		</ul>
-	      </div>)}
-	</motion.div>
+		  <motion.ul layout>
+		    <AnimatePresence initial={false}>
+		      {(tags[cat] ?? []).flatMap (tag => (
+			  renderTagTree (tag, 0, `cat-${ cat }`, suppressClickRef, undefined)))}
+		      <DropSlot cat={cat}/>
+		    </AnimatePresence>
+		  </motion.ul>
+		</motion.div>))}
+	    {post && (
+		<div>
+		  <SectionTitle>情報</SectionTitle>
+		  <ul>
+		    <li>Id.: {post.id}</li>
+		    {/* TODO: uploadedUser の取得を対応したらコメント外す */}
+		    {/*
+		    <li>
+		      <>耕作者: </>
+		      {post.uploadedUser
+		       ? (
+			  <Link to={`/users/${ post.uploadedUser.id }`}>
+			    {post.uploadedUser.name || '名もなきニジラー'}
+			  </Link>)
+		       : 'bot操作'}
+		    </li>
+		    */}
+		    <li>耕作日時: {(new Date (post.createdAt)).toLocaleString ()}</li>
+		    <li>
+		      <>リンク: </>
+		      <a
+			  className="break-all"
+			  href={post.url}
+			  target="_blank"
+			  rel="noopener noreferrer nofollow">
+			{post.url}
+		      </a>
+		    </li>
+		    <li>
+		      {/* TODO: 表示形式きしょすぎるので何とかする */}
+		      <>オリジナルの投稿日時: </>
+		      {!(post.originalCreatedFrom) && !(post.originalCreatedBefore)
+		       ? '不明'
+		       : (
+			  <>
+			    {post.originalCreatedFrom
+			     && `${ (new Date (post.originalCreatedFrom)).toLocaleString () } 以降 `}
+			    {post.originalCreatedBefore
+			     && `${ (new Date (post.originalCreatedBefore)).toLocaleString () } より前`}
+			  </>)}
+		    </li>
+		    <li>
+		      <Link to={`/posts/changes?id=${ post.id }`}>履歴</Link>
+		    </li>
+		  </ul>
+		</div>)}
+	  </motion.div>
+
+	  <DragOverlay adjustScale={false}>
+	    <div className="pointer-events-none">
+	      {activeTagId != null && (() => {
+		const tag = findTag (tags, activeTagId)
+		return tag && <TagLink tag={tag}/>
+	      }) ()}
+	    </div>
+	  </DragOverlay>
+	</DndContext>
       </SidebarComponent>)
 }) satisfies FC<Props>