#399

AGENTS.md

@@ -119,13 +119,8 @@ npm run preview
   parameter-list `)` ではない。delimiter の役割を見誤らないこと。
 - In Ruby, when an `if` condition is split across multiple lines and combines
   clauses with `&&` or `||`, wrap the whole condition in parentheses.
-- Ruby hashes are not blocks; keep `}` on the same line as the final pair.
-- Ruby hashes keep the first pair on the same line as `{` unless line length
-  requires a break.
-- Short Ruby hashes may stay visually compact across two lines with the first
-  pair kept on the opening line and aligned continuation pairs below it.
-- Ruby blocks use separate `{ ... }` rules from hashes, with 2-space body
-  indentation.
+- Ruby hash / block / call delimiter の詳細は、下の
+  `Ruby delimiter and wrapping rules` を正本として扱ふこと。
 - For arrays, never put whitespace or a line break immediately before `]`.
 - Keep the first element on the same line as `[` by default.
 - If an array would exceed the line limit, break after `[` and indent

backend/app/services/post_creator.rb

@@ -73,11 +73,15 @@ class PostCreator
 
     sections.each_value do |ranges|
       ranges.each do |begin_ms, end_ms|
-        next if begin_ms < video_ms && (!end_ms || end_ms <= video_ms)
-
         post = Post.new
-        post.errors.add :video_ms, 'タグ区間が動画時間の範囲外です．'
-        raise ActiveRecord::RecordInvalid, post
+        if begin_ms >= video_ms
+          post.errors.add :video_ms, 'タグ区間の開始が動画時間以上です．'
+          raise ActiveRecord::RecordInvalid, post
+        end
+        if end_ms && end_ms > video_ms
+          post.errors.add :video_ms, 'タグ区間の終端が動画時間を超えてゐます．'
+          raise ActiveRecord::RecordInvalid, post
+        end
       end
     end
   end

backend/app/services/post_import_previewer.rb

@@ -16,8 +16,14 @@ class PostImportPreviewer
 
   def preview_rows rows:, fetch_metadata: true, metadata_cache: { }
     urls = {}
-    rows.map { |row|
-      preview_row(row, urls:, fetch_metadata:, metadata_cache:)
+    prepared_rows = rows.map { prepare_row(_1) }
+    existing_posts =
+        Post.where(url: prepared_rows.map { _1[:normal_url] }.compact.uniq).index_by(&:url)
+    prepared_rows.map { |row|
+      preview_row(row, urls:,
+                  fetch_metadata:,
+                  metadata_cache:,
+                  existing_posts:)
     }
   end
 
@@ -27,22 +33,30 @@ class PostImportPreviewer
 
   private
 
-  def preview_row row, urls:, fetch_metadata:, metadata_cache:
-    row = row.symbolize_keys
+  def prepare_row row
+    source = row.symbolize_keys
+    url = source[:url].to_s.strip
+    normal_url = normalised_url(url)
+    source.merge(url_text: url, normal_url:)
+  end
+
+  def preview_row row, urls:, fetch_metadata:, metadata_cache:, existing_posts:
     attributes = initial_attributes(row)
     provenance = initial_provenance(row)
     tag_sources = initial_tag_sources(row, attributes, provenance)
     field_warnings = initial_field_warnings(row)
     base_warnings = initial_base_warnings(row)
-    url = row[:url].to_s.strip
+    url = row[:url_text]
     provenance['url'] = 'manual'
-    normal_url = normalised_url(url)
+    normal_url = row[:normal_url]
     url_for_metadata = normal_url || url
-    existing_post = normal_url.present? ? Post.find_by(url: normal_url) : nil
+    existing_post = normal_url.present? ? existing_posts[normal_url] : nil
 
     validation_errors = {}
     validation_errors[:url] = ['URL が不正です．'] if normal_url.blank?
-    validation_errors[:url] = ['URL が重複しています．'] if normal_url.present? && urls.key?(normal_url)
+    if normal_url.present? && urls.key?(normal_url)
+      validation_errors[:url] = ['URL が重複しています．']
+    end
     urls[normal_url] = true if normal_url.present?
 
     if row[:metadata_url].present? && row[:metadata_url] != url_for_metadata
@@ -50,7 +64,7 @@ class PostImportPreviewer
       clear_fetch_warnings!(field_warnings)
     end
 
-    if normal_url.present? && existing_post
+    if validation_errors.blank? && normal_url.present? && existing_post
       add_field_warning!(field_warnings, 'url', EXISTING_SKIP_WARNING)
       attributes['tags'] = merged_tags(tag_sources, provenance['tags'])
       warnings_present = field_warnings.values.any?(&:present?) || base_warnings.present?
@@ -267,9 +281,14 @@ class PostImportPreviewer
     ids = raw.to_s.split.map { Integer(_1, exception: false) }
     return if ids.compact.empty? && raw.to_s.blank?
 
-    errors[:parent_post_ids] = ['親投稿 Id. が不正です．'] and return if ids.any? { _1.nil? || _1 <= 0 }
+    if ids.any? { _1.nil? || _1 <= 0 }
+      errors[:parent_post_ids] = ['親投稿 Id. が不正です．']
+      return
+    end
     if Post.where(id: ids).count != ids.uniq.length
       errors[:parent_post_ids] = ['存在しない親投稿 Id. があります．']
     end
   end
+
+  private :prepare_row
 end

backend/app/services/post_import_url_list_parser.rb

@@ -11,7 +11,9 @@ class PostImportUrlListParser
       url = line.strip
       next if url.blank?
 
-      raise ArgumentError, "#{ index + 1 } 行目: URL が長すぎます．" if url.bytesize > MAX_URL_BYTES
+      if url.bytesize > MAX_URL_BYTES
+        raise ArgumentError, "#{ index + 1 } 行目: URL が長すぎます．"
+      end
 
       { source_row: index + 1, url: }
     }

backend/app/services/post_metadata_fetcher.rb

@@ -1,4 +1,9 @@
 class PostMetadataFetcher
+  TIMESTAMP_PATTERN =
+      /\A(\d{4})-(\d{2})-(\d{2})T(\d{2})/ \
+      /(?::(\d{2})(?::(\d{2})(?:\.(\d+))?)?)?/ \
+      /(Z|[+-]\d{2}:?\d{2})?\z/
+
   def self.fetch raw_url
     uri, = Preview::UrlSafety.validate(raw_url)
     response = Preview::HttpFetcher.fetch(
@@ -37,25 +42,76 @@ class PostMetadataFetcher
     return nil if value.blank?
 
     raw = value.to_s.strip
-    from = Time.zone.parse(raw)
-    zone = '(?:Z|[+-]\d{2}:?\d{2})?'
-    before =
-      case raw
-      when /\A\d{4}\z/ then from + 1.year
-      when /\A\d{4}-\d{2}\z/ then from + 1.month
-      when /\A\d{4}-\d{2}-\d{2}\z/ then from + 1.day
-      when /\A\d{4}-\d{2}-\d{2}T\d{2}#{ zone }\z/ then from + 1.hour
-      when /\A\d{4}-\d{2}-\d{2}T\d{2}:\d{2}#{ zone }\z/ then from + 1.minute
-      when /\A\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}#{ zone }\z/ then from + 1.second
-      when /\A\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.(\d+)#{ zone }\z/
-        from + (10**(-Regexp.last_match(1).length))
-      else
-        return nil
-      end
+    from, before =
+        case raw
+        when /\A(\d{4})\z/
+          year = Regexp.last_match(1).to_i
+          from = Time.zone.local(year, 1, 1)
+          [from, from + 1.year]
+        when /\A(\d{4})-(\d{2})\z/
+          year = Regexp.last_match(1).to_i
+          month = Regexp.last_match(2).to_i
+          from = Time.zone.local(year, month, 1)
+          [from, from + 1.month]
+        when /\A(\d{4})-(\d{2})-(\d{2})\z/
+          year = Regexp.last_match(1).to_i
+          month = Regexp.last_match(2).to_i
+          day = Regexp.last_match(3).to_i
+          from = Time.zone.local(year, month, day)
+          [from, from + 1.day]
+        else
+          parse_timestamp_range(raw)
+        end
+    return nil if from.nil? || before.nil?
+
     [from, before]
   rescue ArgumentError, TypeError
     nil
   end
 
-  private_class_method :platform_tags, :original_created_range
+  def self.parse_timestamp_range raw
+    match = raw.match(TIMESTAMP_PATTERN)
+    return nil unless match
+
+    year = match[1].to_i
+    month = match[2].to_i
+    day = match[3].to_i
+    hour = match[4].to_i
+    minute = match[5]&.to_i || 0
+    second = match[6]&.to_i || 0
+    fraction = match[7]
+    offset = parse_offset(match[8])
+    from = Time.new(year, month, day, hour, minute, second + fractional_seconds(fraction), offset)
+              .in_time_zone
+    before =
+        if fraction.present?
+          from + (10**(-fraction.length))
+        elsif match[6].present?
+          from + 1.second
+        elsif match[5].present?
+          from + 1.minute
+        else
+          from + 1.hour
+        end
+    [from, before]
+  end
+
+  def self.parse_offset value
+    return Time.zone.formatted_offset if value.blank?
+    return '+00:00' if value == 'Z'
+
+    value.match?(/\A[+-]\d{2}:\d{2}\z/) ? value : "#{ value[0, 3] }:#{ value[3, 2] }"
+  end
+
+  def self.fractional_seconds value
+    return 0 if value.blank?
+
+    Rational(value.to_i, 10**value.length)
+  end
+
+  private_class_method :platform_tags,
+                       :original_created_range,
+                       :parse_timestamp_range,
+                       :parse_offset,
+                       :fractional_seconds
 end

backend/app/services/preview/http_fetcher.rb

@@ -14,12 +14,8 @@ module Preview
 
     def self.fetch(raw_url,
                    max_bytes: DEFAULT_MAX_BYTES,
-                   redirects: MAX_REDIRECTS,
-                   allowed_hosts: nil)
+                   redirects: MAX_REDIRECTS)
       uri, addresses = UrlSafety.validate(raw_url)
-      if allowed_hosts && !allowed_hosts.include?(uri.host.downcase)
-        raise FetchFailed, '許可されてゐない redirect 先です．'
-      end
       response = request(uri, addresses.first, max_bytes)
 
       if response.is_a?(Net::HTTPRedirection)
@@ -56,7 +52,7 @@ module Preview
               raise FetchFailed, 'redirect 先が不正です．'
             end
 
-        return fetch(redirect_url, max_bytes:, redirects: redirects - 1, allowed_hosts:)
+        return fetch(redirect_url, max_bytes:, redirects: redirects - 1)
       end
 
       unless response.is_a?(Net::HTTPSuccess)

frontend/src/components/posts/import/postImportRowStatus.ts

@@ -18,6 +18,9 @@ export type PostImportBadgeValue =
 export const effectivePostImportStatus = (
     row: PostImportRow,
 ): PostImportEffectiveStatus => {
+    if (Object.keys (row.validationErrors ?? { }).length > 0)
+      return 'error'
+
     switch (row.importStatus)
       {
       case 'created':

frontend/src/lib/postImportSession.ts

@@ -218,6 +218,10 @@ const sanitiseRow = (value: unknown): PostImportRow | null => {
       return null
     if (value.skipReason !== 'existing' && value.existingPostId != null)
       return null
+    if (value.importStatus === 'created' && !(isPositiveInteger (value.createdPostId)))
+      return null
+    if (value.importStatus !== 'created' && value.createdPostId != null)
+      return null
     if (value.createdPostId != null && !(isPositiveInteger (value.createdPostId)))
       return null
 
@@ -618,14 +622,12 @@ const hasValidationErrors = (row: PostImportRow): boolean =>
     Object.keys (row.validationErrors ?? { }).length > 0
 
 
-export const submittableImportRows = (rows: PostImportRow[]): PostImportRow[] =>
+export const processableImportRows = (rows: PostImportRow[]): PostImportRow[] =>
     rows.filter (row => {
 	if (row.importStatus === 'created')
 	  return false
 	if (row.importStatus === 'skipped')
 	  return false
-	if (hasSkipReason (row) && !(hasValidationErrors (row)))
-	  return false
 	if (row.importStatus === 'failed')
 	  return false
 	if (hasValidationErrors (row))
@@ -633,11 +635,14 @@ export const submittableImportRows = (rows: PostImportRow[]): PostImportRow[] =>
 	return row.importStatus == null || row.importStatus === 'pending'
     })
 
+export const creatableImportRows = (rows: PostImportRow[]): PostImportRow[] =>
+    processableImportRows (rows).filter (row => !(hasSkipReason (row)))
+
 
 export const reviewSummaryCounts = (rows: PostImportRow[]) => ({
     total: rows.length,
     submittable: rows.filter (row =>
-	submittableImportRows ([row]).length > 0
+	creatableImportRows ([row]).length > 0
 	&& !(hasValidationErrors (row))).length,
     invalid: rows.filter (row => hasValidationErrors (row)).length,
     skipPlanned: rows.filter (row =>

frontend/src/pages/posts/PostImportResultPage.tsx

@@ -8,6 +8,7 @@ import PageTitle from '@/components/common/PageTitle'
 import PrefetchLink from '@/components/PrefetchLink'
 import MainArea from '@/components/layout/MainArea'
 import PostImportStatusBadge from '@/components/posts/import/PostImportStatusBadge'
+import { effectivePostImportStatus } from '@/components/posts/import/postImportRowStatus'
 import { Button } from '@/components/ui/button'
 import { toast } from '@/components/ui/use-toast'
 import { SITE_TITLE } from '@/config'
@@ -30,7 +31,9 @@ import type { User } from '@/types'
 
 type Props = { user: User | null }
 
-const resultToneClass = (status: string | undefined): string[] => {
+const resultToneClass = (
+    status: ReturnType<typeof effectivePostImportStatus>,
+): string[] => {
     switch (status)
       {
       case 'created':
@@ -42,9 +45,14 @@ const resultToneClass = (status: string | undefined): string[] => {
 	    'border-stone-200 bg-stone-50',
 	    'dark:border-stone-800 dark:bg-stone-900/60']
       case 'failed':
+      case 'error':
 	return [
 	    'border-rose-200 bg-rose-50',
 	    'dark:border-rose-900 dark:bg-rose-950/30']
+      case 'warning':
+	return [
+	    'border-amber-200 bg-amber-50',
+	    'dark:border-amber-900 dark:bg-amber-950/30']
       default:
 	return [
 	    'border-border bg-white',
@@ -52,6 +60,10 @@ const resultToneClass = (status: string | undefined): string[] => {
       }
 }
 
+const rowMessages = (row: PostImportRow): string[] => [
+    ...Object.values (row.validationErrors ?? { }).flat (),
+    ...Object.values (row.importErrors ?? { }).flat ()]
+
 
 const PostImportResultPage: FC<Props> = ({ user }) => {
     const editable = canEditContent (user)
@@ -63,7 +75,7 @@ const PostImportResultPage: FC<Props> = ({ user }) => {
     const [loadingRow, setLoadingRow] = useState<number | null> (null)
 
     useEffect (() => {
-	if (!(sessionId))
+	if (sessionId == null)
 	  return
 
 	const loaded = loadPostImportSession (sessionId, message =>
@@ -73,7 +85,7 @@ const PostImportResultPage: FC<Props> = ({ user }) => {
     }, [sessionId])
 
     useEffect (() => {
-	if (!(sessionId) || !(session))
+	if (sessionId == null || session == null)
 	  return
 
 	savePostImportSession (sessionId, session, message =>
@@ -83,10 +95,13 @@ const PostImportResultPage: FC<Props> = ({ user }) => {
     const counts = useMemo (() => ({
 	created: session?.rows.filter (_1 => _1.importStatus === 'created').length ?? 0,
 	skipped: session?.rows.filter (_1 => _1.importStatus === 'skipped').length ?? 0,
-	failed: session?.rows.filter (_1 => _1.importStatus === 'failed').length ?? 0 }), [session])
+	failed: session?.rows.filter (_1 => _1.importStatus === 'failed').length ?? 0,
+	invalid:
+	    session?.rows.filter (_1 => effectivePostImportStatus (_1) === 'error').length ?? 0,
+    }), [session])
 
     const retry = async (sourceRow: number) => {
-	if (!(session))
+	if (session == null)
 	  return
 
 	setLoadingRow (sourceRow)
@@ -164,7 +179,7 @@ const PostImportResultPage: FC<Props> = ({ user }) => {
     if (!(editable))
       return <Forbidden/>
 
-    if (missing || !(sessionId) || !(session))
+    if (missing || sessionId == null || session == null)
       {
 	return (
 	    <MainArea>
@@ -193,22 +208,25 @@ const PostImportResultPage: FC<Props> = ({ user }) => {
 		<SummaryChip label="登録成功" value={counts.created} badge="created"/>
 		<SummaryChip label="スキップ" value={counts.skipped} badge="skipped"/>
 		<SummaryChip label="失敗" value={counts.failed} badge="failed"/>
+		<SummaryChip label="要修正" value={counts.invalid} badge="error"/>
 	      </div>
 	    </div>
 
 	    <div className="space-y-3">
-	      {session.rows.map (row => (
+	      {session.rows.map (row => {
+		  const status = effectivePostImportStatus (row)
+		  return (
 		  <div
 		      key={row.sourceRow}
 		      className={[
 			  'rounded-lg border p-4',
-			  ...resultToneClass (row.importStatus)].join (' ')}>
+			  ...resultToneClass (status)].join (' ')}>
 		    <div className="flex flex-col gap-3 md:flex-row md:items-start
 				    md:justify-between">
 		      <div className="space-y-2">
 			<div className="flex flex-wrap items-center gap-2">
 			  <span className="text-sm font-medium">行 {row.sourceRow}</span>
-			  <PostImportStatusBadge value={row.importStatus ?? 'pending'}/>
+			  <PostImportStatusBadge value={status}/>
 			</div>
 			<div className="text-sm text-neutral-700 dark:text-neutral-200">
 			  {String (row.attributes.title ?? '') || row.url}
@@ -216,7 +234,7 @@ const PostImportResultPage: FC<Props> = ({ user }) => {
 			<div className="text-xs text-neutral-500 dark:text-neutral-400">
 			  {row.url}
 			</div>
-			<FieldError messages={Object.values (row.importErrors ?? { }).flat ()}/>
+			<FieldError messages={rowMessages (row)}/>
 		      </div>
 
 		      <div className="flex flex-col gap-2 sm:flex-row">
@@ -226,14 +244,15 @@ const PostImportResultPage: FC<Props> = ({ user }) => {
 				投稿を開く
 			      </PrefetchLink>
 			    </Button>)}
+			{status === 'error' && (
+			    <Button
+				type="button"
+				variant="outline"
+				onClick={() => openRepair (row.sourceRow)}>
+			      編輯
+			    </Button>)}
 			{row.importStatus === 'failed' && (
 			    <>
-			      <Button
-				  type="button"
-				  variant="outline"
-				  onClick={() => openRepair (row.sourceRow)}>
-				編輯
-			      </Button>
 			      <Button
 				  type="button"
 				  onClick={() => retry (row.sourceRow)}
@@ -243,7 +262,7 @@ const PostImportResultPage: FC<Props> = ({ user }) => {
 			    </>)}
 		      </div>
 		    </div>
-		  </div>))}
+		  </div>)})}
 	    </div>
 
 	    <div className="flex flex-col gap-2 sm:flex-row">
@@ -280,7 +299,7 @@ const SummaryChip = (
     { label, value, badge }: {
 	label: string
 	value: number
-	badge: 'created' | 'skipped' | 'failed' },
+	badge: 'created' | 'skipped' | 'failed' | 'error' },
 ) => (
     <div className="flex items-center gap-2 rounded-full border border-border
 		    bg-background px-3 py-1 text-sm">

frontend/src/pages/posts/PostImportReviewPage.tsx

@@ -15,11 +15,12 @@ import { SITE_TITLE } from '@/config'
 import { apiPost } from '@/lib/api'
 import { canEditContent } from '@/lib/users'
 import { loadPostImportSession,
+	 creatableImportRows,
 	 mergeImportResults,
 	 mergeValidatedImportRows,
+	 processableImportRows,
 	 reviewSummaryCounts,
 	 savePostImportSession,
-	 submittableImportRows,
 	 type PostImportResultRow,
 	 type PostImportRow,
 	 type PostImportSession } from '@/lib/postImportSession'
@@ -54,7 +55,7 @@ const PostImportReviewPage: FC<Props> = ({ user }) => {
     const [savingRow, setSavingRow] = useState<number | null> (null)
 
     useEffect (() => {
-	if (!(sessionId))
+	if (sessionId == null)
 	  return
 
 	const loaded = loadPostImportSession (sessionId, message =>
@@ -64,7 +65,7 @@ const PostImportReviewPage: FC<Props> = ({ user }) => {
     }, [sessionId])
 
     useEffect (() => {
-	if (!(sessionId) || !(session))
+	if (sessionId == null || session == null)
 	  return
 
 	savePostImportSession (sessionId, session, message =>
@@ -78,9 +79,12 @@ const PostImportReviewPage: FC<Props> = ({ user }) => {
 	? rows.find (_1 => _1.sourceRow === editingSourceRow) ?? null
 	: null
     const counts = useMemo (() => reviewSummaryCounts (rows), [rows])
-    const submittable = useMemo (
-	() => submittableImportRows (rows).filter (row =>
-	    Object.keys (row.validationErrors ?? { }).length === 0),
+    const processable = useMemo (
+	() => processableImportRows (rows),
+	[rows],
+    )
+    const creatable = useMemo (
+	() => creatableImportRows (rows),
 	[rows],
     )
     const reviewRows =
@@ -105,7 +109,7 @@ const PostImportReviewPage: FC<Props> = ({ user }) => {
 	    current ? { ...current, rows: nextRows } : current)
 
     const saveDraft = async (draft: Draft): Promise<boolean> => {
-	if (!(session))
+	if (session == null)
 	  return false
 	if (editingRow == null)
 	  return false
@@ -186,7 +190,7 @@ const PostImportReviewPage: FC<Props> = ({ user }) => {
     }
 
     const submit = async () => {
-	if (!(sessionId) || !(session) || submittable.length === 0)
+	if (sessionId == null || session == null || processable.length === 0)
 	  return
 
 	setLoading (true)
@@ -197,7 +201,7 @@ const PostImportReviewPage: FC<Props> = ({ user }) => {
 		skipped: number
 		failed:  number
 		rows:    PostImportResultRow[] }> ('/posts/import', {
-		    rows: submittable.map (row => ({
+		    rows: processable.map (row => ({
 			sourceRow: row.sourceRow,
 			url: row.url,
 			attributes: row.attributes,
@@ -226,7 +230,7 @@ const PostImportReviewPage: FC<Props> = ({ user }) => {
     if (!(editable))
       return <Forbidden/>
 
-    if (missing || !(sessionId) || !(session))
+    if (missing || sessionId == null || session == null)
       {
 	return (
 	    <MainArea>
@@ -278,7 +282,8 @@ const PostImportReviewPage: FC<Props> = ({ user }) => {
 	  <PostImportFooter
 	      loading={loading}
 	      invalidCount={counts.invalid}
-	      submittableCount={submittable.length}
+	      processableCount={processable.length}
+	      creatableCount={creatable.length}
 	      onBack={() => navigate ('/posts/import')}
 	      onSubmit={submit}/>
 
@@ -295,12 +300,13 @@ const PostImportReviewPage: FC<Props> = ({ user }) => {
 }
 
 const PostImportFooter = (
-    { loading, invalidCount, submittableCount, onBack, onSubmit }: {
-	loading:           boolean
-	invalidCount:      number
-	submittableCount:  number
-	onBack:            () => void
-	onSubmit:          () => void },
+    { loading, invalidCount, processableCount, creatableCount, onBack, onSubmit }: {
+	loading:            boolean
+	invalidCount:       number
+	processableCount:   number
+	creatableCount:     number
+	onBack:             () => void
+	onSubmit:           () => void },
 ) => (
     <div
 	className="shrink-0 border-t bg-white/95 p-4 backdrop-blur
@@ -309,7 +315,7 @@ const PostImportFooter = (
 		      md:items-center md:justify-between">
 	<div className="flex flex-wrap items-center gap-2 text-sm">
 	  <PostImportStatusBadge value="pending"/>
-	  <span>登録対象 {submittableCount} 件</span>
+	  <span>登録対象 {creatableCount} 件</span>
 	  <PostImportStatusBadge value="error"/>
 	  <span>要修正 {invalidCount} 件</span>
 	</div>
@@ -320,7 +326,7 @@ const PostImportFooter = (
 	  <Button
 	      type="button"
 	      onClick={onSubmit}
-	      disabled={loading || submittableCount === 0}>
+	      disabled={loading || processableCount === 0}>
 	    有効な投稿を一括登録
 	  </Button>
 	</div>

frontend/src/pages/posts/PostNewPage.tsx

@@ -24,7 +24,8 @@ import type { User } from '@/types'
 
 type Props = { user: User | null }
 
-type PostFormField = 'url'
+type PostFormField =
+    'url'
     | 'title'
     | 'tags'
     | 'parentPostIds'
@@ -54,9 +55,11 @@ const PostNewPage: FC<Props> = ({ user }) => {
   const [url, setURL] = useState ('')
 
   const thumbnailPreviewRef = useRef ('')
-  const videoFlg = useMemo (() =>
-      tags.split (/\s+/).some (
-	  tag => tag.replace (/\[.*\]$/, '') === '動画'), [tags])
+  const videoFlg =
+      useMemo (() =>
+	  tags.split (/\s+/).some (
+	      tag => tag.replace (/\[.*\]$/, '') === '動画'),
+	       [tags])
 
   const handleSubmit = async () => {
     clearValidationErrors ()
@@ -109,11 +112,13 @@ const PostNewPage: FC<Props> = ({ user }) => {
       URL.revokeObjectURL (thumbnailPreviewRef.current)
     try
     {
-      const data = await apiGet<Blob> ('/preview/thumbnail', { params: { url },
-							      responseType: 'blob' })
+      const data = await apiGet<Blob> ('/preview/thumbnail',
+				       { params: { url },
+					 responseType: 'blob' })
       const imageURL = URL.createObjectURL (data)
       setThumbnailPreview (imageURL)
-      setThumbnailFile (new File ([data], 'thumbnail.png',
+      setThumbnailFile (new File ([data],
+				  'thumbnail.png',
 				  { type: data.type || 'image/png' }))
     }
     finally