#206

backend/app/controllers/posts_controller.rb

@@ -2,38 +2,46 @@ class PostsController < ApplicationController
   Event = Struct.new(:post, :tag, :user, :change_type, :timestamp, keyword_init: true)
 
   def index
+    url = params[:url].presence
+    title = params[:title].presence
+    original_created_from = params[:original_created_from].presence
+    original_created_to = params[:original_created_to].presence
+    created_between = params[:created_from].presence, params[:created_to].presence
+    updated_between = params[:updated_from].presence, params[:updated_to].presence
+
     page = (params[:page].presence || 1).to_i
     limit = (params[:limit].presence || 20).to_i
-    cursor = params[:cursor].presence
 
     page = 1 if page < 1
     limit = 1 if limit < 1
 
     offset = (page - 1) * limit
 
-    sort_sql =
-        'COALESCE(posts.original_created_before - INTERVAL 1 SECOND,' +
-        'posts.original_created_from,' +
-        'posts.created_at)'
     q =
         filtered_posts
         .preload(tags: { tag_name: :wiki_page })
         .with_attached_thumbnail
-        .select("posts.*, #{ sort_sql } AS sort_ts")
-        .order(Arel.sql("#{ sort_sql } DESC"))
-    posts =
-        if cursor
-          q.where("#{ sort_sql } < ?", Time.iso8601(cursor)).limit(limit + 1)
-        else
-          q.limit(limit).offset(offset)
-        end
-        .to_a
 
-    next_cursor = nil
-    if cursor && posts.length > limit
-      next_cursor = posts.last.read_attribute('sort_ts').iso8601(6)
-      posts = posts.first(limit)
+    q = q.where('posts.url LIKE ?', "%#{ url }%") if url
+    q = q.where('posts.title LIKE ?', "%#{ title }%") if title
+    if original_created_from
+      q = q.where('posts.original_created_before > ?', original_created_from)
     end
+    if original_created_to
+      q = q.where('posts.original_created_from <= ?', original_created_to)
+    end
+    q = q.where('posts.created_at >= ?', created_between[0]) if created_between[0]
+    q = q.where('posts.created_at <= ?', created_between[1]) if created_between[1]
+    q = q.where('posts.updated_at >= ?', updated_between[0]) if updated_between[0]
+    q = q.where('posts.updated_at <= ?', updated_between[1]) if updated_between[1]
+
+    sort_sql =
+        'COALESCE(posts.original_created_before - INTERVAL 1 MINUTE,' +
+        'posts.original_created_from,' +
+        'posts.created_at)'
+    posts = q.select("posts.*, #{ sort_sql } AS sort_ts")
+             .order(Arel.sql("#{ sort_sql } DESC"))
+             .limit(limit).offset(offset).to_a
 
     render json: { posts: posts.map { |post|
       PostRepr.base(post).tap do |json|
@@ -44,11 +52,7 @@ class PostsController < ApplicationController
               nil
             end
       end
-    }, count: if filtered_posts.group_values.present?
-      filtered_posts.count.size
-    else
-      filtered_posts.count
-    end, next_cursor: }
+    }, count: q.group_values.present? ? q.count.size : q.count }
   end
 
   def random
@@ -63,7 +67,7 @@ class PostsController < ApplicationController
   end
 
   def show
-    post = Post.includes(tags: { tag_name: :wiki_page }).find(params[:id])
+    post = Post.includes(tags: { tag_name: :wiki_page }).find_by(id: params[:id])
     return head :not_found unless post
 
     viewed = current_user&.viewed?(post) || false
@@ -84,7 +88,7 @@ class PostsController < ApplicationController
     title = params[:title].presence
     url = params[:url]
     thumbnail = params[:thumbnail]
-    tag_names = params[:tags].to_s.split(' ')
+    tag_names = params[:tags].to_s.split
     original_created_from = params[:original_created_from]
     original_created_before = params[:original_created_before]
 
@@ -125,7 +129,7 @@ class PostsController < ApplicationController
     return head :forbidden unless current_user.member?
 
     title = params[:title].presence
-    tag_names = params[:tags].to_s.split(' ')
+    tag_names = params[:tags].to_s.split
     original_created_from = params[:original_created_from]
     original_created_before = params[:original_created_before]
 
@@ -192,7 +196,7 @@ class PostsController < ApplicationController
   private
 
   def filtered_posts
-    tag_names = params[:tags].to_s.split(' ')
+    tag_names = params[:tags].to_s.split
     match_type = params[:match]
     if tag_names.present?
       filter_posts_by_tags(tag_names, match_type)

backend/spec/requests/posts_spec.rb

@@ -1,7 +1,8 @@
+include ActiveSupport::Testing::TimeHelpers
+
 require 'rails_helper'
 require 'set'
 
-
 RSpec.describe 'Posts API', type: :request do
   # create / update で thumbnail.attach は走るが、
   # resized_thumbnail! が MiniMagick 依存でコケやすいので request spec ではスタブしとくのが無難。
@@ -114,6 +115,204 @@ RSpec.describe 'Posts API', type: :request do
         expect(json.fetch('count')).to eq(0)
       end
     end
+
+    context 'when url is provided' do
+      let!(:url_hit_post) do
+        Post.create!(uploaded_user: user, title: 'url hit',
+                     url: 'https://example.com/needle-url-xyz').tap do |p|
+          PostTag.create!(post: p, tag:)
+        end
+      end
+
+      let!(:url_miss_post) do
+        Post.create!(uploaded_user: user, title: 'url miss',
+                     url: 'https://example.com/other-url').tap do |p|
+          PostTag.create!(post: p, tag:)
+        end
+      end
+
+      it 'filters posts by url substring' do
+        get '/posts', params: { url: 'needle-url-xyz' }
+
+        expect(response).to have_http_status(:ok)
+        ids = json.fetch('posts').map { |p| p['id'] }
+
+        expect(ids).to include(url_hit_post.id)
+        expect(ids).not_to include(url_miss_post.id)
+        expect(json.fetch('count')).to eq(1)
+      end
+    end
+
+    context 'when title is provided' do
+      let!(:title_hit_post) do
+        Post.create!(uploaded_user: user, title: 'needle-title-xyz',
+                     url: 'https://example.com/title-hit').tap do |p|
+          PostTag.create!(post: p, tag:)
+        end
+      end
+
+      let!(:title_miss_post) do
+        Post.create!(uploaded_user: user, title: 'other title',
+                     url: 'https://example.com/title-miss').tap do |p|
+          PostTag.create!(post: p, tag:)
+        end
+      end
+
+      it 'filters posts by title substring' do
+        get '/posts', params: { title: 'needle-title-xyz' }
+
+        expect(response).to have_http_status(:ok)
+        ids = json.fetch('posts').map { |p| p['id'] }
+
+        expect(ids).to include(title_hit_post.id)
+        expect(ids).not_to include(title_miss_post.id)
+        expect(json.fetch('count')).to eq(1)
+      end
+    end
+
+    context 'when created_from/created_to are provided' do
+      let(:t_created_hit) { Time.zone.local(2010, 1, 5, 12, 0, 0) }
+      let(:t_created_miss) { Time.zone.local(2012, 1, 5, 12, 0, 0) }
+
+      let!(:created_hit_post) do
+        travel_to(t_created_hit) do
+          Post.create!(uploaded_user: user, title: 'created hit',
+                       url: 'https://example.com/created-hit').tap do |p|
+            PostTag.create!(post: p, tag:)
+          end
+        end
+      end
+
+      let!(:created_miss_post) do
+        travel_to(t_created_miss) do
+          Post.create!(uploaded_user: user, title: 'created miss',
+                       url: 'https://example.com/created-miss').tap do |p|
+            PostTag.create!(post: p, tag:)
+          end
+        end
+      end
+
+      it 'filters posts by created_at range' do
+        get '/posts', params: {
+          created_from: Time.zone.local(2010, 1, 1, 0, 0, 0).iso8601,
+          created_to: Time.zone.local(2010, 12, 31, 23, 59, 59).iso8601
+        }
+
+        expect(response).to have_http_status(:ok)
+        ids = json.fetch('posts').map { |p| p['id'] }
+
+        expect(ids).to include(created_hit_post.id)
+        expect(ids).not_to include(created_miss_post.id)
+        expect(json.fetch('count')).to eq(1)
+      end
+    end
+
+    context 'when updated_from/updated_to are provided' do
+      let(:t0) { Time.zone.local(2011, 2, 1, 12, 0, 0) }
+      let(:t1) { Time.zone.local(2011, 2, 10, 12, 0, 0) }
+
+      let!(:updated_hit_post) do
+        p = nil
+        travel_to(t0) do
+          p = Post.create!(uploaded_user: user, title: 'updated hit',
+                           url: 'https://example.com/updated-hit').tap do |pp|
+            PostTag.create!(post: pp, tag:)
+          end
+        end
+        travel_to(t1) do
+          p.update!(title: 'updated hit v2')
+        end
+        p
+      end
+
+      let!(:updated_miss_post) do
+        travel_to(Time.zone.local(2013, 1, 1, 12, 0, 0)) do
+          Post.create!(uploaded_user: user, title: 'updated miss',
+                       url: 'https://example.com/updated-miss').tap do |p|
+            PostTag.create!(post: p, tag:)
+          end
+        end
+      end
+
+      it 'filters posts by updated_at range' do
+        get '/posts', params: {
+          updated_from: Time.zone.local(2011, 2, 5, 0, 0, 0).iso8601,
+          updated_to: Time.zone.local(2011, 2, 20, 23, 59, 59).iso8601
+        }
+
+        expect(response).to have_http_status(:ok)
+        ids = json.fetch('posts').map { |p| p['id'] }
+
+        expect(ids).to include(updated_hit_post.id)
+        expect(ids).not_to include(updated_miss_post.id)
+        expect(json.fetch('count')).to eq(1)
+      end
+    end
+
+    context 'when original_created_from/original_created_to are provided' do
+      # 注意: controller の現状ロジックに合わせてる
+      # original_created_from は `original_created_before > ?`
+      # original_created_to   は `original_created_from <= ?`
+
+      let!(:oc_hit_post) do
+        Post.create!(uploaded_user: user, title: 'oc hit',
+                     url: 'https://example.com/oc-hit',
+                     original_created_from: Time.zone.local(2015, 1, 1, 0, 0, 0),
+                     original_created_before: Time.zone.local(2015, 1, 10, 0, 0, 0)).tap do |p|
+          PostTag.create!(post: p, tag:)
+        end
+      end
+
+      # original_created_from の条件は「original_created_before > param」なので、
+      # before が param 以下になるようにする（ただし before >= from は守る）
+      let!(:oc_miss_post_for_from) do
+        Post.create!(
+          uploaded_user: user,
+          title: 'oc miss for from',
+          url: 'https://example.com/oc-miss-from',
+          original_created_from: Time.zone.local(2014, 12, 1, 0, 0, 0),
+          original_created_before: Time.zone.local(2015, 1, 1, 0, 0, 0)
+        ).tap { |p| PostTag.create!(post: p, tag:) }
+      end
+
+      # original_created_to の条件は「original_created_from <= param」なので、
+      # from が param より後になるようにする（before >= from は守る）
+      let!(:oc_miss_post_for_to) do
+        Post.create!(
+          uploaded_user: user,
+          title: 'oc miss for to',
+          url: 'https://example.com/oc-miss-to',
+          original_created_from: Time.zone.local(2015, 2, 1, 0, 0, 0),
+          original_created_before: Time.zone.local(2015, 2, 10, 0, 0, 0)
+        ).tap { |p| PostTag.create!(post: p, tag:) }
+      end
+
+      it 'filters posts by original_created_from (current controller behavior)' do
+        get '/posts', params: {
+          original_created_from: Time.zone.local(2015, 1, 5, 0, 0, 0).iso8601
+        }
+
+        expect(response).to have_http_status(:ok)
+        ids = json.fetch('posts').map { |p| p['id'] }
+
+        expect(ids).to include(oc_hit_post.id)
+        expect(ids).not_to include(oc_miss_post_for_from.id)
+        expect(json.fetch('count')).to eq(2)
+      end
+
+      it 'filters posts by original_created_to (current controller behavior)' do
+        get '/posts', params: {
+          original_created_to: Time.zone.local(2015, 1, 15, 0, 0, 0).iso8601
+        }
+
+        expect(response).to have_http_status(:ok)
+        ids = json.fetch('posts').map { |p| p['id'] }
+
+        expect(ids).to include(oc_hit_post.id)
+        expect(ids).not_to include(oc_miss_post_for_to.id)
+        expect(json.fetch('count')).to eq(2)
+      end
+    end
   end
 
   describe 'GET /posts/:id' do

frontend/src/App.tsx

@@ -16,6 +16,7 @@ import PostDetailPage from '@/pages/posts/PostDetailPage'
 import PostHistoryPage from '@/pages/posts/PostHistoryPage'
 import PostListPage from '@/pages/posts/PostListPage'
 import PostNewPage from '@/pages/posts/PostNewPage'
+import PostSearchPage from '@/pages/posts/PostSearchPage'
 import ServiceUnavailable from '@/pages/ServiceUnavailable'
 import SettingPage from '@/pages/users/SettingPage'
 import WikiDetailPage from '@/pages/wiki/WikiDetailPage'
@@ -42,6 +43,7 @@ const RouteTransitionWrapper = ({ user, setUser }: {
 	    <Route path="/" element={<Navigate to="/posts" replace/>}/>
 	    <Route path="/posts" element={<PostListPage/>}/>
 	    <Route path="/posts/new" element={<PostNewPage user={user}/>}/>
+	    <Route path="/posts/search" element={<PostSearchPage/>}/>
 	    <Route path="/posts/:id" element={<PostDetailRoute user={user}/>}/>
 	    <Route path="/posts/changes" element={<PostHistoryPage/>}/>
 	    <Route path="/tags/nico" element={<NicoTagListPage user={user}/>}/>

frontend/src/components/TopNav.tsx

@@ -69,8 +69,9 @@ export default (({ user }: Props) => {
   const menu: Menu = [
       { name: '広場', to: '/posts', subMenu: [
 	  { name: '一覧', to: '/posts' },
+	  { name: '検索', to: '/posts/search' },
 	  { name: '投稿追加', to: '/posts/new' },
-	  { name: '耕作履歴', to: '/posts/changes' },
+	  { name: '履歴', to: '/posts/changes' },
 	  { name: 'ヘルプ', to: '/wiki/ヘルプ:広場' }] },
       { name: 'タグ', to: '/tags', subMenu: [
 	  { name: 'タグ一覧', to: '/tags', visible: false },

frontend/src/lib/posts.ts

@@ -4,22 +4,28 @@ import type { Post, PostTagChange } from '@/types'
 
 
 export const fetchPosts = async (
-    { tags, match, page, limit, cursor }: {
-	tags:     string
-	match:    'any' | 'all'
+    { url, title, tags, match, created_from, created_to, updated_from,
+      updated_to, original_created_from, original_created_to, page, limit }: {
+	url?:                   string
+	title?:                 string
+	tags?:                  string
+	match?:                 'all' | 'any'
+	created_from?:          string
+	created_to?:            string
+	updated_from?:          string
+	updated_to?:            string
+	original_created_from?: string
+	original_created_to?:   string
 	page?:                  number
-	limit?:   number
-	cursor?:  string }
+	limit?:                 number },
 ): Promise<{
     posts:      Post[]
-    count:      number
-    nextCursor: string }> =>
+    count:      number }> =>
 	await apiGet ('/posts', { params: {
-	    tags,
-	    match,
+	    url, title, tags, match, created_from, created_to, updated_from, updated_to,
+	    original_created_from, original_created_to,
 	    ...(page && { page }),
-	    ...(limit && { limit }),
-	    ...(cursor && { cursor }) } })
+	    ...(limit && { limit }) } })
 
 
 export const fetchPost = async (id: string): Promise<Post> => await apiGet (`/posts/${ id }`)

frontend/src/lib/prefetchers.ts

@@ -68,13 +68,32 @@ const prefetchWikiPageShow: Prefetcher = async (qc, url) => {
 
 const prefetchPostsIndex: Prefetcher = async (qc, url) => {
   const tags = url.searchParams.get ('tags') ?? ''
-  const m = url.searchParams.get ('match') === 'any' ? 'any' : 'all'
+  const qURL = url.searchParams.get ('url')
+  const title = url.searchParams.get ('title')
+  const originalCreatedFrom = url.searchParams.get ('original_created_from')
+  const originalCreatedTo = url.searchParams.get ('original_created_to')
+  const createdFrom = url.searchParams.get ('created_from')
+  const createdTo = url.searchParams.get ('created_to')
+  const updatedFrom = url.searchParams.get ('updated_from')
+  const updatedTo = url.searchParams.get ('updated_to')
+  const m: 'all' | 'any' = url.searchParams.get ('match') === 'any' ? 'any' : 'all'
   const page = Number (url.searchParams.get ('page') || 1)
   const limit = Number (url.searchParams.get ('limit') || 20)
 
+  const keys = {
+      tags, match: m, page, limit,
+      ...(qURL && { url: qURL }),
+      ...(title && { title }),
+      ...(originalCreatedFrom && { original_created_from: originalCreatedFrom }),
+      ...(originalCreatedTo && { original_created_to: originalCreatedTo }),
+      ...(createdFrom && { created_from: createdFrom }),
+      ...(createdTo && { created_to: createdTo }),
+      ...(updatedFrom && { updated_from: updatedFrom }),
+      ...(updatedTo && { updated_to: updatedTo }) }
+
   await qc.prefetchQuery ({
-      queryKey: postsKeys.index ({ tags, match: m, page, limit }),
-      queryFn:  () => fetchPosts ({ tags, match: m, page, limit }) })
+      queryKey: postsKeys.index (keys),
+      queryFn:  () => fetchPosts (keys) })
 }
 
 
@@ -103,8 +122,9 @@ const prefetchPostChanges: Prefetcher = async (qc, url) => {
 
 
 export const routePrefetchers: { test: (u: URL) => boolean; run: Prefetcher }[] = [
-    { test: u => u.pathname === '/' || u.pathname === '/posts', run: prefetchPostsIndex },
-    { test: u => (!(['/posts/new', '/posts/changes'].includes (u.pathname))
+    { test: u => ['/', '/posts', '/posts/search'].includes (u.pathname),
+      run: prefetchPostsIndex },
+    { test: u => (!(['/posts/new', '/posts/changes', '/posts/search'].includes (u.pathname))
 		  && Boolean (mPost (u.pathname))),
       run: prefetchPostShow },
     { test: u => u.pathname === '/posts/changes', run: prefetchPostChanges },
@@ -119,5 +139,6 @@ export const prefetchForURL = async (qc: QueryClient, urlLike: string): Promise<
   const r = routePrefetchers.find (x => x.test (u))
   if (!(r))
     return
+
   await r.run (qc, u)
 }

frontend/src/lib/queryKeys.ts

@@ -1,7 +1,17 @@
 export const postsKeys = {
     root:     ['posts'] as const,
-    index:    (p: { tags: string; match: 'any' | 'all'; page: number; limit: number }) =>
-		  ['posts', 'index', p] as const,
+    index:    (p: { url?:                   string
+		    title?:                 string
+		    tags?:                  string
+		    match?:                 'all' | 'any'
+		    created_from?:          string
+		    created_to?:            string
+		    updated_from?:          string
+		    updated_to?:            string
+		    original_created_from?: string
+		    original_created_to?:   string
+		    page?:                  number
+		    limit?:                 number }) => ['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 }) =>

frontend/src/pages/posts/PostListPage.tsx

@@ -39,7 +39,7 @@ export default (() => {
       queryKey: postsKeys.index ({ tags: tagsKey, match, page, limit }),
       queryFn:  () => fetchPosts ({ tags: tagsKey, match, page, limit }) })
   const posts = data?.posts ?? []
-  const cursor = data?.nextCursor ?? ''
+  const cursor = ''
   const totalPages = data ? Math.ceil (data.count / limit) : 0
 
   useLayoutEffect (() => {

frontend/src/pages/posts/PostSearchPage.tsx

@@ -0,0 +1,246 @@
+import { useQuery } from '@tanstack/react-query'
+import { useState } from 'react'
+import { Helmet } from 'react-helmet-async'
+import { useLocation, useNavigate } from 'react-router-dom'
+
+import PrefetchLink from '@/components/PrefetchLink'
+import TagLink from '@/components/TagLink'
+import DateTimeField from '@/components/common/DateTimeField'
+import Label from '@/components/common/Label'
+import PageTitle from '@/components/common/PageTitle'
+import Pagination from '@/components/common/Pagination'
+import MainArea from '@/components/layout/MainArea'
+import { SITE_TITLE } from '@/config'
+import { fetchPosts } from '@/lib/posts'
+import { postsKeys } from '@/lib/queryKeys'
+
+import type { FC, FormEvent } from 'react'
+
+
+export default (() => {
+  const navigate = useNavigate ()
+
+  const location = useLocation ()
+  const query = new URLSearchParams (location.search)
+  const page = Number (query.get ('page') ?? 1)
+  const limit = Number (query.get ('limit') ?? 20)
+
+  const [createdFrom, setCreatedFrom] =
+      useState<string | null> (query.get ('created_from'))
+  const [createdTo, setCreatedTo] =
+      useState<string | null> (query.get ('created_to'))
+  const [matchType, setMatchType] =
+      useState<'all' | 'any'> ((query.get ('match') as 'all' | 'any' | null) ?? 'all')
+  const [originalCreatedFrom, setOriginalCreatedFrom] =
+      useState<string | null> (query.get ('original_created_from'))
+  const [originalCreatedTo, setOriginalCreatedTo] =
+      useState<string | null> (query.get ('original_created_to'))
+  const [tagsStr, setTagsStr] = useState (query.get ('tags') ?? '')
+  const [title, setTitle] = useState (query.get ('title') ?? '')
+  const [updatedFrom, setUpdatedFrom] =
+      useState<string | null> (query.get ('updated_from'))
+  const [updatedTo, setUpdatedTo] =
+      useState<string | null> (query.get ('updated_to'))
+  const [url, setURL] = useState (query.get ('url') ?? '')
+
+  const keys = {
+      tags: tagsStr, match: matchType, page, limit,
+      ...(url && { url }),
+      ...(title && { title }),
+      ...(originalCreatedFrom && { original_created_from: originalCreatedFrom }),
+      ...(originalCreatedTo && { original_created_to: originalCreatedTo }),
+      ...(createdFrom && { created_from: createdFrom }),
+      ...(createdTo && { created_to: createdTo }),
+      ...(updatedFrom && { updated_from: updatedFrom }),
+      ...(updatedTo && { updated_to: updatedTo }) }
+  const { data, /* isLoading: loading */ } = useQuery ({
+      queryKey: postsKeys.index (keys), queryFn: () => fetchPosts (keys) })
+  const results = data?.posts ?? []
+  const totalPages = data ? Math.ceil (data.count / limit) : 0
+
+  const search = async () => {
+    const qs = new URLSearchParams (location.search)
+    qs.set ('page', String ('1'))
+    navigate (`${ location.pathname }?${ qs.toString () }`)
+  }
+
+  const handleSearch = (e: FormEvent) => {
+    e.preventDefault ()
+    search ()
+  }
+
+  return (
+      <MainArea>
+	<Helmet>
+	  <title>広場検索 | {SITE_TITLE}</title>
+	</Helmet>
+
+	<div className="max-w-xl">
+	  <PageTitle>広場検索</PageTitle>
+
+	  <form onSubmit={handleSearch} className="space-y-2">
+	    {/* タイトル */}
+	    <div>
+	      <Label>タイトル</Label>
+	      <input
+		  type="text"
+		  value={title}
+		  onChange={e => setTitle (e.target.value)}
+		  className="w-full border p-2 rounded"/>
+	    </div>
+
+	    {/* URL */}
+	    <div>
+	      <Label>URL</Label>
+	      <input
+		  type="text"
+		  value={url}
+		  onChange={e => setURL (e.target.value)}
+		  className="w-full border p-2 rounded"/>
+	    </div>
+
+	    {/* タグ */}
+	    <div>
+	      <Label>タグ</Label>
+	      <input
+		  type="text"
+		  value={tagsStr}
+		  onChange={e => setTagsStr (e.target.value)}
+		  className="w-full border p-2 rounded"/>
+	      <fieldset className="w-full my-2">
+		<label>検索区分：</label>
+		<label className="mx-2">
+		  <input
+		      type="radio"
+		      name="match-type"
+		      checked={matchType === 'all'}
+		      onChange={() => setMatchType ('all')}/>
+		  AND
+		</label>
+		<label className="mx-2">
+		  <input
+		      type="radio"
+		      name="match-type"
+		      checked={matchType === 'any'}
+		      onChange={() => setMatchType ('any')}/>
+		  OR
+		</label>
+	      </fieldset>
+	    </div>
+
+	    {/* オリジナルの投稿日時 */}
+	    <div>
+	      <Label>オリジナルの投稿日時</Label>
+	      <DateTimeField
+		  value={originalCreatedFrom ?? undefined}
+		  onChange={setOriginalCreatedFrom}/>
+	      <span className="mx-1">〜</span>
+	      <DateTimeField
+		  value={originalCreatedTo ?? undefined}
+		  onChange={setOriginalCreatedTo}/>
+	    </div>
+
+	    {/* 投稿日時 */}
+	    <div>
+	      <Label>投稿日時</Label>
+	      <DateTimeField
+		  value={createdFrom ?? undefined}
+		  onChange={setCreatedFrom}/>
+	      <span className="mx-1">〜</span>
+	      <DateTimeField
+		  value={createdTo ?? undefined}
+		  onChange={setCreatedTo}/>
+	    </div>
+
+	    {/* 更新日時 */}
+	    <div>
+	      <Label>更新日時</Label>
+	      <DateTimeField
+		  value={updatedFrom ?? undefined}
+		  onChange={setUpdatedFrom}/>
+	      <span className="mx-1">〜</span>
+	      <DateTimeField
+		  value={updatedTo ?? undefined}
+		  onChange={setUpdatedTo}/>
+	    </div>
+
+	    {/* 検索 */}
+	    <div className="py-3">
+	      <button
+		  type="submit"
+		  className="bg-blue-500 text-white px-4 py-2 rounded">
+		検索
+	      </button>
+	    </div>
+	  </form>
+	</div>
+
+	{results.length > 0 && (
+	    <div className="mt-4">
+	      <div className="overflow-x-auto">
+		<table className="w-full min-w-[1200px] table-fixed border-collapse">
+		  <colgroup>
+		    <col className="w-14"/>
+		    <col className="w-72"/>
+		    <col className="w-80"/>
+		    <col className="w-[24rem]"/>
+		    <col className="w-44"/>
+		    <col className="w-44"/>
+		    <col className="w-44"/>
+		  </colgroup>
+
+		  <thead className="border-b-2 border-black dark:border-white">
+		    <tr>
+		      <th className="p-2 text-left whitespace-nowrap">投稿</th>
+		      <th className="p-2 text-left whitespace-nowrap">タイトル</th>
+		      <th className="p-2 text-left whitespace-nowrap">URL</th>
+		      <th className="p-2 text-left whitespace-nowrap">タグ</th>
+		      <th className="p-2 text-left whitespace-nowrap">オリジナルの投稿日時</th>
+		      <th className="p-2 text-left whitespace-nowrap">投稿日時</th>
+		      <th className="p-2 text-left whitespace-nowrap">更新日時</th>
+		    </tr>
+		  </thead>
+		  <tbody>
+		    {results.map (row => (
+			<tr key={row.id} className={'even:bg-gray-100 dark:even:bg-gray-700'}>
+			  <td className="p-2">
+			    <PrefetchLink to={`/posts/${ row.id }`} title={row.title}>
+			      <img src={row.thumbnail || row.thumbnailBase || undefined}
+				   alt={row.title || row.url}
+				   title={row.title || row.url || undefined}
+				   className="w-8"/>
+			    </PrefetchLink>
+			  </td>
+			  <td className="p-2 truncate">
+			    <PrefetchLink to={`/posts/${ row.id }`} title={row.title}>
+			      {row.title}
+			    </PrefetchLink>
+			  </td>
+			  <td className="p-2 truncate">
+			    <a href={row.url}
+			       title={row.url}
+			       target="_blank"
+			       rel="noopener noreferrer nofollow">
+			      {row.url}
+			    </a>
+			  </td>
+			  <td className="p-2">
+			    {row.tags.map (t => (
+				<span key={t.id} className="mr-2">
+				  <TagLink tag={t} withWiki={false} withCount={false}/>
+				</span>))}
+			  </td>
+			  <td className="p-2">
+			    {row.originalCreatedFrom} 〜 {row.originalCreatedBefore}
+			  </td>
+			  <td className="p-2">{row.createdAt}</td>
+			  <td className="p-2">{row.updatedAt}</td>
+			</tr>))}
+		  </tbody>
+		</table>
+	      </div>
+
+	      <Pagination page={page} totalPages={totalPages}/>
+	    </div>)}
+      </MainArea>)
+}) satisfies FC

frontend/src/types.ts

@@ -25,9 +25,10 @@ export type Post = {
     tags:                   Tag[]
     viewed:                 boolean
     related:                Post[]
-    createdAt:              string
     originalCreatedFrom:    string | null
-    originalCreatedBefore:  string | null }
+    originalCreatedBefore:  string | null
+    createdAt:              string
+    updatedAt:              string }
 
 export type PostTagChange = {
     post:       Post