設定画面 (#34) (#397)

Reviewed-on: #397
Co-authored-by: miteruzo <miteruzo@naver.com>
Co-committed-by: miteruzo <miteruzo@naver.com>

frontend/src/pages/posts/PostListPage.tsx

@@ -1,7 +1,7 @@
 import { useQuery } from '@tanstack/react-query'
-import { useLayoutEffect, useMemo, useRef, useState } from 'react'
+import { useEffect, useLayoutEffect, useMemo, useRef, useState } from 'react'
 import { Helmet } from 'react-helmet-async'
-import { useLocation } from 'react-router-dom'
+import { useLocation, useNavigate } from 'react-router-dom'
 
 import PostList from '@/components/PostList'
 import PrefetchLink from '@/components/PrefetchLink'
@@ -13,12 +13,24 @@ import MainArea from '@/components/layout/MainArea'
 import { SITE_TITLE } from '@/config'
 import { fetchPosts } from '@/lib/posts'
 import { postsKeys } from '@/lib/queryKeys'
+import {
+    DEFAULT_POST_LIST_LIMIT,
+    getClientListLimit,
+    LIST_LIMIT_OPTIONS,
+    setClientListSettings,
+} from '@/lib/settings'
+import { useKeyboardShortcuts } from '@/lib/useKeyboardShortcuts'
 import { fetchWikiPageByTitle } from '@/lib/wiki'
 
 import type { FC } from 'react'
 
 import type { WikiPage } from '@/types'
 
+const parseLimit = (value: string | null): 20 | 50 | 100 | null => {
+  const n = Number (value)
+  return n === 20 || n === 50 || n === 100 ? n : null
+}
+
 
 const PostListPage: FC = () => {
   const containerRef = useRef<HTMLDivElement | null> (null)
@@ -26,6 +38,7 @@ const PostListPage: FC = () => {
   const [wikiPage, setWikiPage] = useState<WikiPage | null> (null)
 
   const location = useLocation ()
+  const navigate = useNavigate ()
   const query = new URLSearchParams (location.search)
   const tagsQuery = query.get ('tags') ?? ''
   const anyFlg = query.get ('match') === 'any'
@@ -33,13 +46,18 @@ const PostListPage: FC = () => {
   const tags = useMemo (() => tagsQuery.split (' ').filter (e => e !== ''), [tagsQuery])
   const tagsKey = tags.join (' ')
   const page = Number (query.get ('page') ?? 1)
-  const limit = Number (query.get ('limit') ?? 20)
+  const limit = (
+      parseLimit (query.get ('limit'))
+      ?? getClientListLimit ('postList')
+      ?? DEFAULT_POST_LIST_LIMIT
+  )
+  const order = 'original_created_at:desc' as const
 
   const keys = {
       tags: tagsKey, match, page, limit,
       url: '', title: '', originalCreatedFrom: '', originalCreatedTo: '',
       createdFrom: '', createdTo: '', updatedFrom: '', updatedTo: '',
-      order: 'original_created_at:desc' } as const
+      order } as const
   const { data, isLoading: loading } = useQuery ({
       queryKey: postsKeys.index (keys),
       queryFn:  () => fetchPosts (keys) })
@@ -47,6 +65,40 @@ const PostListPage: FC = () => {
   const cursor = ''
   const totalPages = data ? Math.ceil (data.count / limit) : 0
 
+  useEffect (() => {
+    setClientListSettings ('postList', { limit })
+  }, [limit])
+
+  const updatePage = (nextPage: number) => {
+    const params = new URLSearchParams (location.search)
+    params.set ('page', String (Math.max (1, nextPage)))
+    navigate (`${ location.pathname }?${ params.toString () }`)
+  }
+
+  const updateListQuery = (next: { limit?: 20 | 50 | 100 }) => {
+    const params = new URLSearchParams (location.search)
+    params.set ('limit', String (next.limit ?? limit))
+    params.set ('page', '1')
+    navigate (`${ location.pathname }?${ params.toString () }`)
+  }
+
+  useKeyboardShortcuts (useMemo (() => ({
+      ...(page > 1
+	  ? {
+	      'pagination.previous': () => {
+		  updatePage (page - 1)
+	      },
+	  }
+	  : { }),
+      ...(totalPages > 0 && page < totalPages
+	  ? {
+	      'pagination.next': () => {
+		  updatePage (Math.min (page + 1, totalPages))
+	      },
+	  }
+	  : { }),
+  }), [page, totalPages, location.search]))
+
   useLayoutEffect (() => {
     scroll (0, 0)
 
@@ -90,7 +142,24 @@ const PostListPage: FC = () => {
 	}}/>
 
 	<MainArea>
-	  <TabGroup>
+	  <TabGroup
+	      rightAddon={
+		  <label className="flex items-center gap-2 text-xs text-muted-foreground">
+		    <span>件数</span>
+		    <select
+			className="rounded border border-border bg-background px-2 py-1 text-sm
+				   text-foreground"
+			value={limit}
+			onChange={ev => updateListQuery ({
+			    limit: Number (ev.target.value) as 20 | 50 | 100,
+			})}>
+		      {LIST_LIMIT_OPTIONS.map (value => (
+			  <option key={value} value={value}>
+			    {value}
+			  </option>))}
+		    </select>
+		  </label>
+	      }>
 	    <Tab name="広場">
 	      {posts.length > 0
 	       ? (