#61

frontend/src/lib/posts.ts

@@ -29,14 +29,17 @@ export const fetchPost = async (id: string): Promise<Post> => await apiGet (`/po
 
 
 export const fetchPostChanges = async (
-    { id, page, limit }: {
+    { id, tag, page, limit }: {
 	id?:    string
+	tag?:   string
 	page:   number
 	limit:  number },
 ): Promise<{
     changes:  PostTagChange[]
     count:    number }> =>
-	await apiGet ('/posts/changes', { params: { ...(id && { id }), page, limit } })
+	await apiGet ('/posts/changes', { params: { ...(id && { id }),
+						    ...(tag && { tag }),
+						    page, limit } })
 
 
 export const toggleViewedFlg = async (id: string, viewed: boolean): Promise<void> => {

frontend/src/lib/prefetchers.ts

@@ -3,7 +3,7 @@ import { match } from 'path-to-regexp'
 
 import { fetchPost, fetchPosts, fetchPostChanges } from '@/lib/posts'
 import { postsKeys, tagsKeys, wikiKeys } from '@/lib/queryKeys'
-import { fetchTagByName, fetchTags } from '@/lib/tags'
+import { fetchTagByName, fetchTag, fetchTags } from '@/lib/tags'
 import { fetchWikiPage,
 	 fetchWikiPageByTitle,
 	 fetchWikiPages } from '@/lib/wiki'
@@ -122,12 +122,24 @@ const prefetchPostShow: Prefetcher = async (qc, url) => {
 
 const prefetchPostChanges: Prefetcher = async (qc, url) => {
   const id = url.searchParams.get ('id')
+  const tag = url.searchParams.get ('tag')
   const page = Number (url.searchParams.get ('page') || 1)
   const limit = Number (url.searchParams.get ('limit') || 20)
 
+  if (tag)
+    {
       await qc.prefetchQuery ({
-      queryKey: postsKeys.changes ({ ...(id && { id }), page, limit }),
-      queryFn:  () => fetchPostChanges ({ ...(id && { id }), page, limit }) })
+	  queryKey: tagsKeys.show (tag),
+	  queryFn: () => fetchTag (tag) })
+    }
+
+  await qc.prefetchQuery ({
+      queryKey: postsKeys.changes ({ ...(id && { id }),
+				     ...(tag && { tag }),
+				     page, limit }),
+      queryFn:  () => fetchPostChanges ({ ...(id && { id }),
+					  ...(tag && { tag }),
+					  page, limit }) })
 }
 
 

frontend/src/lib/queryKeys.ts

@@ -5,7 +5,7 @@ export const postsKeys = {
     index:    (p: FetchPostsParams) => ['posts', 'index', p] as const,
     show:     (id: string) => ['posts', id] as const,
     related:  (id: string) => ['related', id] as const,
-    changes:  (p: { id?: string; page: number; limit: number }) =>
+    changes:  (p: { id?: string; tag?: string; page: number; limit: number }) =>
 		  ['posts', 'changes', p] as const }
 
 export const tagsKeys = {

frontend/src/lib/tags.ts

@@ -23,6 +23,18 @@ export const fetchTags = async (
 	...(order && { order }) } })
 
 
+export const fetchTag = async (id: string): Promise<Tag | null> => {
+  try
+  {
+    return await apiGet (`/tags/${ id }`)
+  }
+  catch
+  {
+    return null
+  }
+}
+
+
 export const fetchTagByName = async (name: string): Promise<Tag | null> => {
   try
   {

frontend/src/pages/posts/PostHistoryPage.tsx

@@ -11,7 +11,8 @@ import Pagination from '@/components/common/Pagination'
 import MainArea from '@/components/layout/MainArea'
 import { SITE_TITLE } from '@/config'
 import { fetchPostChanges } from '@/lib/posts'
-import { postsKeys } from '@/lib/queryKeys'
+import { postsKeys, tagsKeys } from '@/lib/queryKeys'
+import { fetchTag } from '@/lib/tags'
 import { cn, dateString } from '@/lib/utils'
 
 import type { FC } from 'react'
@@ -21,15 +22,26 @@ export default (() => {
   const location = useLocation ()
   const query = new URLSearchParams (location.search)
   const id = query.get ('id')
+  const tagId = query.get ('tag')
   const page = Number (query.get ('page') ?? 1)
   const limit = Number (query.get ('limit') ?? 20)
 
   // 投稿列の結合で使用
   let rowsCnt: number
 
+  const { data: tag } =
+      tagId
+      ? useQuery ({ queryKey: tagsKeys.show (tagId),
+		    queryFn: () => fetchTag (tagId) })
+      : { data: null }
+
   const { data, isLoading: loading } = useQuery ({
-      queryKey: postsKeys.changes ({ ...(id && { id }), page, limit }),
-      queryFn:  () => fetchPostChanges ({ ...(id && { id }), page, limit }) })
+      queryKey: postsKeys.changes ({ ...(id && { id }),
+				     ...(tagId && { tag: tagId }),
+				     page, limit }),
+      queryFn:  () => fetchPostChanges ({ ...(id && { id }),
+					  ...(tagId && { tag: tagId }),
+					  page, limit }) })
   const changes = data?.changes ?? []
   const totalPages = data ? Math.ceil (data.count / limit) : 0
 
@@ -48,6 +60,7 @@ export default (() => {
 	<PageTitle>
 	  耕作履歴
 	  {id && <>: 投稿 {<PrefetchLink to={`/posts/${ id }`}>#{id}</PrefetchLink>}</>}
+	  {tag && <>（<TagLink tag={tag} withWiki={false} withCount={false}/>）</>}
 	</PageTitle>
 
 	{loading ? 'Loading...' : (

frontend/src/pages/tags/TagListPage.tsx

@@ -3,6 +3,7 @@ import { useEffect, useMemo, useState } from 'react'
 import { Helmet } from 'react-helmet-async'
 import { useLocation, useNavigate } from 'react-router-dom'
 
+import PrefetchLink from '@/components/PrefetchLink'
 import SortHeader from '@/components/SortHeader'
 import TagLink from '@/components/TagLink'
 import DateTimeField from '@/components/common/DateTimeField'
@@ -211,6 +212,7 @@ export default (() => {
 		    <col className="w-16"/>
 		    <col className="w-44"/>
 		    <col className="w-44"/>
+		    <col className="w-16"/>
 		  </colgroup>
 
 		  <thead className="border-b-2 border-black dark:border-white">
@@ -250,6 +252,7 @@ export default (() => {
 			    currentOrder={order}
 			    defaultDirection={defaultDirection}/>
 		      </th>
+		      <th className="p-2 text-left whitespace-nowrap"/>
 		    </tr>
 		  </thead>
 
@@ -263,6 +266,11 @@ export default (() => {
 			  <td className="p-2 text-right">{row.postCount}</td>
 			  <td className="p-2">{dateString (row.createdAt)}</td>
 			  <td className="p-2">{dateString (row.updatedAt)}</td>
+			  <td className="p-2">
+			    <PrefetchLink to={`/posts/changes?tag=${ row.id }`}>
+			      耕作履歴
+			    </PrefetchLink>
+			  </td>
 			</tr>))}
 		  </tbody>
 		</table>