#93

frontend/package-lock.json

@@ -25,7 +25,8 @@
         "react-markdown": "^10.1.0",
         "react-markdown-editor-lite": "^1.3.4",
         "react-router-dom": "^6.30.0",
-        "tailwind-merge": "^3.3.0"
+        "tailwind-merge": "^3.3.0",
+        "unist-util-visit-parents": "^6.0.1"
       },
       "devDependencies": {
         "@eslint/js": "^9.25.0",

frontend/package.json

@@ -27,7 +27,8 @@
     "react-markdown": "^10.1.0",
     "react-markdown-editor-lite": "^1.3.4",
     "react-router-dom": "^6.30.0",
-    "tailwind-merge": "^3.3.0"
+    "tailwind-merge": "^3.3.0",
+    "unist-util-visit-parents": "^6.0.1"
   },
   "devDependencies": {
     "@eslint/js": "^9.25.0",

frontend/src/components/WikiBody.tsx

@@ -1,12 +1,13 @@
 import axios from 'axios'
 import toCamel from 'camelcase-keys'
-import { useEffect, useState } from 'react'
+import { useEffect, useMemo, useState } from 'react'
 import ReactMarkdown from 'react-markdown'
 import { Link } from 'react-router-dom'
 
 import SectionTitle from '@/components/common/SectionTitle'
 import SubsectionTitle from '@/components/common/SubsectionTitle'
 import { API_BASE_URL } from '@/config'
+import remarkWikiAutoLink from '@/lib/remark-wiki-autolink'
 
 import type { Components } from 'react-markdown'
 
@@ -32,7 +33,8 @@ const mdComponents = { h1:  ({ children }) => <SectionTitle>{children}</SectionT
 
 export default ({ title, body }: Props) => {
   const [pageNames, setPageNames] = useState<string[]> ([])
-  const [realBody, setRealBody] = useState<string> ('')
+
+  const remarkPlugins = useMemo (() => [remarkWikiAutoLink (pageNames)], [pageNames])
 
   useEffect (() => {
     if (!(body))
@@ -42,7 +44,7 @@ export default ({ title, body }: Props) => {
       try
       {
 	const res = await axios.get (`${ API_BASE_URL }/wiki`)
-	const data = toCamel (res.data as any, { deep: true }) as WikiPage[]
+	const data: WikiPage[] = toCamel (res.data as any, { deep: true })
 	setPageNames (data.map (page => page.title).sort ((a, b) => b.length - a.length))
       }
       catch
@@ -50,54 +52,10 @@ export default ({ title, body }: Props) => {
 	setPageNames ([])
       }
     }) ()
-  }, [])
-
-  useEffect (() => {
-    setRealBody ('')
   }, [body])
 
-  useEffect (() => {
-    if (!(body))
-      return
-
-    const matchIndices = (target: string, keyword: string) => {
-      const indices: number[] = []
-      let pos = 0
-      let idx
-      while ((idx = target.indexOf (keyword, pos)) >= 0)
-	{
-	  indices.push (idx)
-	  pos = idx + keyword.length
-	}
-
-      return indices
-    }
-
-    const linkIndices = (text: string, names: string[]): [string, [number, number]][] => {
-      const result: [string, [number, number]][] = []
-
-      names.forEach (name => {
-	matchIndices (text, name).forEach (idx => {
-	  const start = idx
-	  const end = idx + name.length
-	  const overlaps = result.some (([, [st, ed]]) => start < ed && end > st)
-	  if (!(overlaps))
-	    result.push ([name, [start, end]])
-	})
-      })
-
-      return result.sort (([, [a]], [, [b]]) => b - a)
-    }
-
-    setRealBody (
-	linkIndices (body, pageNames).reduce ((acc, [name, [start, end]]) => (
-	    acc.slice (0, start)
-	    + `[${ name }](/wiki/${ encodeURIComponent (name) })`
-	    + acc.slice (end)), body))
-  }, [body, pageNames])
-
   return (
-      <ReactMarkdown components={mdComponents}>
-	{realBody || `このページは存在しません。[新規作成してください](/wiki/new?title=${ encodeURIComponent (title) })。`}
+      <ReactMarkdown components={mdComponents} remarkPlugins={remarkPlugins}>
+	{body || `このページは存在しません。[新規作成してください](/wiki/new?title=${ encodeURIComponent (title) })。`}
       </ReactMarkdown>)
 }

frontend/src/lib/remark-wiki-autolink.ts

@@ -0,0 +1,101 @@
+import type { Content, Parent, Root, RootContent } from 'mdast'
+
+const escapeForRegExp = (s: string) => s.replace (/[.*+?^${}()|[\]\\]/g, '\\$&')
+
+
+export default (pageNames: string[], basePath = '/wiki'): ((tree: Root) => void) => {
+  const names = pageNames.sort ((a, b) => b.length - a.length)
+
+  if (names.length === 0)
+    {
+      return () => {
+	;
+      }
+    }
+
+  const re = new RegExp (`(${ names.map (escapeForRegExp).join ('|') })`, 'g')
+
+  return (tree: Root) => {
+    const edits: { parent: Parent; index: number; parts: RootContent[] }[] = []
+
+    const walk = (node: Content | Root, ancestors: Parent[]) => {
+      if (!(node) || (typeof node !== 'object'))
+	return
+
+      if (!(ancestors.some (ancestor => ['link',
+					 'linkReference',
+					 'image',
+					 'imageReference',
+					 'code',
+					 'inlineCode'].includes (ancestor?.type)))
+	  && (node.type === 'text'))
+	{
+	  const value = node.value ?? ''
+	  if (value)
+	    {
+	      re.lastIndex = 0
+	      let m: RegExpExecArray | null
+	      let last = 0
+	      const parts: RootContent[] = []
+
+	      while (m = re.exec (value))
+		{
+		  const start = m.index
+		  const end = start + m[0].length
+
+		  if (start > last)
+		    parts.push ({ type: 'text', value: value.slice (last, start) })
+
+		  const name = m[0]
+		  parts.push ({ type:     'link',
+				url:      `${ basePath }/${ encodeURIComponent (name) }`,
+				title:    null,
+				children: [{ type: 'text', value: name }],
+				data:     { hProperties: { 'data-wiki': '1' } } })
+		  last = end
+		}
+
+		if (parts.length)
+		  {
+		    if (last < value.length)
+		      parts.push ({ type: 'text', value: value.slice (last) })
+		    const parent = ancestors[ancestors.length - 1]
+		    if (parent && Array.isArray (parent.children))
+		      {
+			const index = parent.children.indexOf (node)
+			if (index >= 0)
+			  edits.push ({ parent, index, parts })
+		      }
+		  }
+	    }
+	}
+
+      const maybeChidren = (node as any).children
+      if (Array.isArray (maybeChidren))
+	{
+	  const parent = node as Parent
+
+	  for (let i = 0; i < maybeChidren.length; ++i)
+	    {
+	      const child: Content | undefined = maybeChidren[i]
+	      if (!(child))
+		continue
+	      walk (child, ancestors.concat (parent))
+	    }
+	}
+    }
+
+    walk (tree, [])
+
+    for (let i = edits.length - 1; i >= 0; --i)
+      {
+	const { parent, index, parts } = edits[i]
+
+	if (!(parent) || !(Array.isArray (parent.children)))
+	  continue
+
+	if (0 <= index && index < parent.children.length)
+	  parent.children.splice (index, 1, ...parts)
+      }
+  }
+}

frontend/src/pages/wiki/WikiEditPage.tsx

@@ -27,8 +27,9 @@ export default ({ user }: Props) => {
 
   const navigate = useNavigate ()
 
-  const [title, setTitle] = useState ('')
   const [body, setBody] = useState ('')
+  const [loading, setLoading] = useState (true)
+  const [title, setTitle] = useState ('')
 
   const handleSubmit = async () => {
     const formData = new FormData ()
@@ -51,10 +52,12 @@ export default ({ user }: Props) => {
 
   useEffect (() => {
     void (async () => {
+      setLoading (true)
       const res = await axios.get (`${ API_BASE_URL }/wiki/${ id }`)
       const data = res.data as WikiPage
       setTitle (data.title)
       setBody (data.body)
+      setLoading (false)
     }) ()
   }, [id])
 
@@ -66,30 +69,33 @@ export default ({ user }: Props) => {
 	<div className="max-w-xl mx-auto p-4 space-y-4">
 	  <h1 className="text-2xl font-bold mb-2">Wiki ページを編輯</h1>
 
-	  {/* タイトル */}
-	  {/* TODO: タグ補完 */}
-	  <div>
-	    <label className="block font-semibold mb-1">タイトル</label>
-	    <input type="text"
-		   value={title}
-		   onChange={e => setTitle (e.target.value)}
-		   className="w-full border p-2 rounded" />
-	  </div>
-
-	  {/* 本文 */}
-	  <div>
-	    <label className="block font-semibold mb-1">本文</label>
-	    <MdEditor value={body}
-		      style={{ height: '500px' }}
-		      renderHTML={text => mdParser.render (text)}
-		      onChange={({ text }) => setBody (text)} />
-	  </div>
-
-	  {/* 送信 */}
-	  <button onClick={handleSubmit}
-		  className="px-4 py-2 bg-blue-600 text-white rounded disabled:bg-gray-400">
-	    追加
-	  </button>
+	  {loading ? 'Loading...' : (
+	      <>
+		{/* タイトル */}
+		{/* TODO: タグ補完 */}
+		<div>
+		  <label className="block font-semibold mb-1">タイトル</label>
+		  <input type="text"
+			 value={title}
+			 onChange={e => setTitle (e.target.value)}
+			 className="w-full border p-2 rounded" />
+		</div>
+
+		{/* 本文 */}
+		<div>
+		  <label className="block font-semibold mb-1">本文</label>
+		  <MdEditor value={body}
+			    style={{ height: '500px' }}
+			    renderHTML={text => mdParser.render (text)}
+			    onChange={({ text }) => setBody (text)} />
+		</div>
+
+		{/* 送信 */}
+		<button onClick={handleSubmit}
+			className="px-4 py-2 bg-blue-600 text-white rounded disabled:bg-gray-400">
+		  追加
+		</button>
+	      </>)}
 	</div>
       </MainArea>)
 }