#317

backend/app/controllers/application_controller.rb

@@ -1,16 +1,14 @@
 class ApplicationController < ActionController::API
-  before_action :reject_banned_ip_address!
   before_action :authenticate_user
-  before_action :reject_banned_user!
 
-  def current_user = @current_user
+  def current_user
+    @current_user
+  end
 
   private
 
   def authenticate_user
     code = request.headers['X-Transfer-Code'] || request.headers['HTTP_X_TRANSFER_CODE']
-    return if code.blank?
-
     @current_user = User.find_by(inheritance_code: code)
   end
 
@@ -24,17 +22,4 @@ class ApplicationController < ActionController::API
       s.in?(['', '1', 'true', 'on', 'yes'])
     end
   end
-
-  def reject_banned_ip_address!
-    ip_address = IpAddress.find_by(ip_address: IPAddr.new(request.remote_ip).hton)
-    return unless ip_address&.banned?
-
-    head :forbidden
-  end
-
-  def reject_banned_user!
-    return unless current_user&.banned?
-
-    head :forbidden
-  end
 end

backend/app/controllers/nico_tags_controller.rb

@@ -33,8 +33,8 @@ class NicoTagsController < ApplicationController
     return head :bad_request unless tag.nico?
 
     linked_tag_names = params[:tags].to_s.split
-    linked_tags = Tag.normalise_tags!(linked_tag_names, with_tagme: false,
-                                                        with_no_deerjikist: false)
+    linked_tags = Tag.normalise_tags(linked_tag_names, with_tagme: false,
+                                                       with_no_deerjikist: false)
     return head :bad_request if linked_tags.any? { |t| t.nico? }
 
     ApplicationRecord.transaction do

backend/app/controllers/posts_controller.rb

@@ -44,7 +44,7 @@ class PostsController < ApplicationController
         filtered_posts
         .joins("LEFT JOIN (#{ pt_max_sql }) pt_max ON pt_max.post_id = posts.id")
         .reselect('posts.*', Arel.sql("#{ updated_at_all_sql } AS updated_at_all"))
-        .preload(tags: [:deerjikists, :materials, { tag_name: :wiki_page }])
+        .preload(tags: [:materials, { tag_name: :wiki_page }])
         .with_attached_thumbnail
 
     q = q.where('posts.url LIKE ?', "%#{ url }%") if url
@@ -95,7 +95,7 @@ class PostsController < ApplicationController
   end
 
   def random
-    post = filtered_posts.preload(tags: [:deerjikists, :materials, { tag_name: :wiki_page }])
+    post = filtered_posts.preload(tags: [:materials, { tag_name: :wiki_page }])
                          .order('RAND()')
                          .first
     return head :not_found unless post
@@ -104,12 +104,12 @@ class PostsController < ApplicationController
   end
 
   def show
-    post = Post.includes(tags: [:deerjikists, :materials, { tag_name: :wiki_page }]).find_by(id: params[:id])
+    post = Post.includes(tags: [:materials, { tag_name: :wiki_page }]).find_by(id: params[:id])
     return head :not_found unless post
 
     render json: PostRepr.base(post, current_user)
                          .merge(tags: build_tag_tree_for(post.tags),
-                                related: PostRepr.many(post.related(limit: 20)))
+                                related: post.related(limit: 20))
   end
 
   def create
@@ -123,36 +123,28 @@ class PostsController < ApplicationController
     tag_names = params[:tags].to_s.split
     original_created_from = params[:original_created_from]
     original_created_before = params[:original_created_before]
-    parent_post_ids = parse_parent_post_ids
 
     post = Post.new(title:, url:, thumbnail_base: nil, uploaded_user: current_user,
                     original_created_from:, original_created_before:)
-    post.thumbnail.attach(thumbnail) if thumbnail.present?
+    post.thumbnail.attach(thumbnail)
 
     ApplicationRecord.transaction do
       post.save!
-
-      tags = Tag.normalise_tags!(tag_names)
+      tags = Tag.normalise_tags(tag_names)
       TagVersioning.record_tag_snapshots!(tags, created_by_user: current_user)
 
       tags = Tag.expand_parent_tags(tags)
       sync_post_tags!(post, tags)
-
-      sync_parent_posts!(post, parent_post_ids)
-
       post.resized_thumbnail!
-
       PostVersionRecorder.record!(post:, event_type: :create, created_by_user: current_user)
     end
 
     post.reload
     render json: PostRepr.base(post), status: :created
+  rescue ActiveRecord::RecordInvalid
+    render json: { errors: post.errors.full_messages }, status: :unprocessable_entity
   rescue Tag::NicoTagNormalisationError
     head :bad_request
-  rescue ArgumentError => e
-    render json: { errors: [e.message] }, status: :unprocessable_entity
-  rescue ActiveRecord::RecordInvalid => e
-    render json: { errors: e.record.errors.full_messages }, status: :unprocessable_entity
   end
 
   def viewed
@@ -173,76 +165,35 @@ class PostsController < ApplicationController
     return head :unauthorized unless current_user
     return head :forbidden unless current_user.gte_member?
 
-    force = bool?(:force)
-    merge = bool?(:merge)
-    return head :bad_request if force && merge
-
-    base_version_no = parse_base_version_no
-    return head :bad_request if !(force) && !(base_version_no)
-
     title = params[:title].presence
     tag_names = params[:tags].to_s.split
     original_created_from = params[:original_created_from]
     original_created_before = params[:original_created_before]
-    parent_post_ids = parse_parent_post_ids
 
-    post = nil
-    conflict_json = nil
+    post = Post.find(params[:id].to_i)
 
     ApplicationRecord.transaction do
-      post = Post.lock.find(params[:id].to_i)
+      PostVersionRecorder.ensure_snapshot!(post, created_by_user: current_user)
 
-      base_version = nil
-      base_snapshot = nil
-      current_snapshot = nil
-      unless force
-        base_version = post.post_versions.find_by!(version_no: base_version_no)
+      post.update!(title:, original_created_from:, original_created_before:)
 
-        base_snapshot = post_snapshot_from_version(base_version)
-        current_snapshot = post_snapshot_from_record(post)
-      end
-      incoming_snapshot = post_incoming_snapshot(title:,
-                                                 original_created_from:,
-                                                 original_created_before:,
-                                                 tag_names:,
-                                                 parent_post_ids:)
+      normalised_tags = Tag.normalise_tags(tag_names, with_tagme: false)
+      TagVersioning.record_tag_snapshots!(normalised_tags, created_by_user: current_user)
 
-      snapshot_to_apply =
-          if force || post.version_no == base_version_no || current_snapshot == base_snapshot
-            incoming_snapshot
-          else
-            changes = post_snapshot_changes(base_snapshot, current_snapshot, incoming_snapshot)
-            conflicts = changes.select { |change| change[:conflict] }
-
-            if merge && conflicts.empty?
-              merge_post_snapshots(base_snapshot, current_snapshot, incoming_snapshot)
-            else
-              conflict_json = post_conflict_json(post:,
-                                                 base_version_no:,
-                                                 base_snapshot:,
-                                                 current_snapshot:,
-                                                 incoming_snapshot:,
-                                                 changes:,
-                                                 conflicts:)
-              raise ActiveRecord::Rollback
-            end
-          end
-
-      apply_post_snapshot!(post, snapshot_to_apply)
+      tags = post.tags.nico.to_a + normalised_tags
+      tags = Tag.expand_parent_tags(tags)
+      sync_post_tags!(post, tags)
+      PostVersionRecorder.record!(post:, event_type: :update, created_by_user: current_user)
     end
 
-    return render json: conflict_json, status: :conflict if conflict_json
-
     post.reload
-    json = PostRepr.base(post, current_user)
+    json = post.as_json
     json['tags'] = build_tag_tree_for(post.tags)
     render json:, status: :ok
+  rescue ActiveRecord::RecordInvalid
+    render json: post.errors, status: :unprocessable_entity
   rescue Tag::NicoTagNormalisationError
     head :bad_request
-  rescue ArgumentError => e
-    render json: { errors: [e.message] }, status: :unprocessable_entity
-  rescue ActiveRecord::RecordInvalid => e
-    render json: { errors: e.record.errors.full_messages }, status: :unprocessable_entity
   end
 
   def changes
@@ -260,7 +211,7 @@ class PostsController < ApplicationController
     pts = pts.where(post_id: id) if id.present?
     pts = pts.where(tag_id:) if tag_id.present?
     pts = pts.includes(:post, :created_user, :deleted_user,
-                       tag: [:deerjikists, :materials, { tag_name: :wiki_page }])
+                       tag: [:materials, { tag_name: :wiki_page }])
 
     events = []
     pts.each do |pt|
@@ -402,242 +353,4 @@ class PostsController < ApplicationController
 
     root_ids.filter_map { |id| build_node.call(id, []) }
   end
-
-  def parse_parent_post_ids
-    raise ArgumentError, 'parent_post_ids は必須です．' unless params.key?(:parent_post_ids)
-
-    params[:parent_post_ids].to_s.split.map { |token|
-      id = Integer(token, exception: false)
-      raise ArgumentError, "親投稿 Id. が不正です: #{ token }" if id.nil? || id <= 0
-
-      id
-    }.uniq
-  end
-
-  def sync_parent_posts! post, parent_post_ids
-    if parent_post_ids.include?(post.id)
-      post.errors.add(:base, '自分自身を親投稿にはできません．')
-      raise ActiveRecord::RecordInvalid, post
-    end
-
-    existing_ids = Post.where(id: parent_post_ids).pluck(:id)
-    missing_ids = parent_post_ids - existing_ids
-
-    if missing_ids.present?
-      post.errors.add(:base, "存在しない親投稿 ID があります: #{ missing_ids.join(' ') }")
-      raise ActiveRecord::RecordInvalid, post
-    end
-
-    current_ids = post.parent_posts.pluck(:id)
-
-    ids_to_add = parent_post_ids - current_ids
-    ids_to_remove = current_ids - parent_post_ids
-
-    PostImplication.where(post_id: post.id, parent_post_id: ids_to_remove).delete_all
-
-    ids_to_add.each do |parent_post_id|
-      PostImplication.create_or_find_by!(post_id: post.id, parent_post_id:)
-    end
-  end
-
-  def parse_base_version_no
-    version_no = Integer(params[:base_version_no], exception: false)
-    if version_no&.positive?
-      version_no
-    else
-      nil
-    end
-  end
-
-  def post_snapshot_from_version version
-    { title: version.title,
-      original_created_from: snapshot_time(version.original_created_from),
-      original_created_before: snapshot_time(version.original_created_before),
-      tag_names: editable_tag_names_from_version(version),
-      parent_post_ids: snapshot_parent_post_ids_from_version(version) }
-  end
-
-  def editable_tag_names_from_version version
-    version.tags.to_s.split.reject { |name| name.downcase.start_with?('nico:') }.sort
-  end
-
-  def post_snapshot_from_record post
-    { title: post.title,
-      original_created_from: snapshot_time(post.original_created_from),
-      original_created_before: snapshot_time(post.original_created_before),
-      tag_names: editable_tag_names_from_post(post),
-      parent_post_ids: post.parent_posts.order(:id).pluck(:id) }
-  end
-
-  def editable_tag_names_from_post post
-    post.tags.not_nico.joins(:tag_name).order('tag_names.name').pluck('tag_names.name')
-  end
-
-  def post_incoming_snapshot title:, original_created_from:, original_created_before:,
-                             tag_names:, parent_post_ids:
-    { title:,
-      original_created_from: snapshot_time(original_created_from),
-      original_created_before: snapshot_time(original_created_before),
-      tag_names: incoming_tag_names_for_snapshot(tag_names),
-      parent_post_ids: parent_post_ids.sort }
-  end
-
-  def snapshot_parent_post_ids_from_version version
-    if version.respond_to?(:parent_post_ids)
-      version.parent_post_ids.to_s.split.map { |id| id.to_i }.sort
-    elsif version.respond_to?(:parent_id) && version.parent_id
-      [version.parent_id]
-    else
-      []
-    end
-  end
-
-  def snapshot_time value
-    return nil if value.blank?
-
-    value = Time.zone.parse(value.to_s) if value in String
-    value&.in_time_zone&.iso8601(6)
-  rescue ArgumentError, TypeError
-    value.to_s
-  end
-
-  def incoming_tag_names_for_snapshot raw_tag_names
-    tags = Tag.normalise_tags!(raw_tag_names, with_tagme: false)
-
-    Tag.expand_parent_tags(tags).map(&:name).uniq.sort
-  end
-
-  def post_conflict_json post:, base_version_no:, base_snapshot:,
-                         current_snapshot:, incoming_snapshot:, changes:, conflicts:
-    { error: 'conflict',
-      message: '競合が発生しました．',
-      post_id: post.id,
-      base_version_no:,
-      current_version_no: post.version_no,
-      base: base_snapshot,
-      current: current_snapshot,
-      mine: incoming_snapshot,
-      changes:,
-      conflicts:,
-      mergeable: conflicts.empty? }
-  end
-
-  def post_snapshot_changes base_snapshot, current_snapshot, incoming_snapshot
-    [scalar_snapshot_change(:title, 'タイトル',
-                            base_snapshot, current_snapshot, incoming_snapshot),
-     scalar_snapshot_change(:original_created_from, 'オリジナルの作成日時（以降）',
-                            base_snapshot, current_snapshot, incoming_snapshot),
-     scalar_snapshot_change(:original_created_before, 'オリジナルの作成日時（より前）',
-                            base_snapshot, current_snapshot, incoming_snapshot),
-     set_snapshot_change(:tag_names, 'タグ',
-                         base_snapshot, current_snapshot, incoming_snapshot),
-     set_snapshot_change(:parent_post_ids, '親投稿',
-                         base_snapshot, current_snapshot, incoming_snapshot)].compact
-  end
-
-  def scalar_snapshot_change field, label, base_snapshot, current_snapshot, incoming_snapshot
-    base = base_snapshot[field]
-    current = current_snapshot[field]
-    mine = incoming_snapshot[field]
-
-    return nil if current == base && mine == base
-
-    { field:, label:, base:, current:, mine:,
-      changed_by_current: current != base,
-      changed_by_me: mine != base,
-      conflict: scalar_snapshot_conflict?(base, current, mine) }
-  end
-
-  def scalar_snapshot_conflict? base, current, mine
-    current != base && mine != base && current != mine
-  end
-
-  def set_snapshot_change field, label, base_snapshot, current_snapshot, incoming_snapshot
-    base = base_snapshot[field].to_a
-    current = current_snapshot[field].to_a
-    mine = incoming_snapshot[field].to_a
-
-    added_by_current = current - base
-    removed_by_current = base - current
-    added_by_me = mine - base
-    removed_by_me = base - mine
-
-    if (added_by_current.empty? &&
-        removed_by_current.empty? &&
-        added_by_me.empty? &&
-        removed_by_me.empty?)
-      return nil
-    end
-
-    { field:, label:, base:, current:, mine:, added_by_current:, removed_by_current:,
-      added_by_me:, removed_by_me:,
-      changed_by_current: added_by_current.present? || removed_by_current.present?,
-      changed_by_me: added_by_me.present? || removed_by_me.present?,
-      conflict: set_snapshot_conflict?(added_by_current:,
-                                       removed_by_current:,
-                                       added_by_me:,
-                                       removed_by_me:) }
-  end
-
-  def set_snapshot_conflict? added_by_current:, removed_by_current:,
-                             added_by_me:, removed_by_me:
-    (added_by_current & removed_by_me).present? || (removed_by_current & added_by_me).present?
-  end
-
-  def apply_post_snapshot! post, snapshot
-    PostVersionRecorder.ensure_snapshot!(post, created_by_user: current_user)
-
-    post.update!(title: snapshot[:title],
-                 original_created_from: snapshot[:original_created_from],
-                 original_created_before: snapshot[:original_created_before])
-
-    editable_tags = Tag.normalise_tags!(snapshot[:tag_names], with_tagme: false)
-    TagVersioning.record_tag_snapshots!(editable_tags, created_by_user: current_user)
-
-    readonly_tags = post.tags.nico.to_a
-
-    tags = readonly_tags + editable_tags
-    tags = Tag.expand_parent_tags(tags)
-
-    sync_post_tags!(post, tags)
-    sync_parent_posts!(post, snapshot[:parent_post_ids])
-
-    PostVersionRecorder.record!(post:, event_type: :update, created_by_user: current_user)
-  end
-
-  def merge_post_snapshots base_snapshot, current_snapshot, incoming_snapshot
-    [:title, :original_created_from, :original_created_before].map {
-      [_1, merge_scalar_snapshot_value(base_snapshot[_1],
-                                       current_snapshot[_1],
-                                       incoming_snapshot[_1])]
-    }.to_h.merge([:tag_names, :parent_post_ids].map {
-      [_1, merge_set_snapshot_value(base_snapshot[_1],
-                                    current_snapshot[_1],
-                                    incoming_snapshot[_1])]
-    }.to_h)
-  end
-
-  def merge_scalar_snapshot_value base, current, mine
-    return mine if current == base
-    return current if mine == base || current == mine
-
-    raise ArgumentError, '競合してゐる項目はマージできません．'
-  end
-
-  def merge_set_snapshot_value base, current, mine
-    base = base.to_a
-    current = current.to_a
-    mine = mine.to_a
-
-    added_by_current = current - base
-    removed_by_current = base - current
-    added_by_me = mine - base
-    removed_by_me = base - mine
-
-    merged = base + added_by_current + added_by_me
-    merged -= removed_by_current
-    merged -= removed_by_me
-
-    merged.uniq.sort
-  end
 end

backend/app/controllers/tags_controller.rb

@@ -1,7 +1,3 @@
-require 'net/http'
-require 'uri'
-
-
 class TagsController < ApplicationController
   def index
     post_id = params[:post]
@@ -186,8 +182,7 @@ class TagsController < ApplicationController
              .find_by(id: params[:id])
     return head :not_found unless tag
 
-    render json: { tag: TagRepr.base(tag),
-                   deerjikists: DeerjikistRepr.many(tag.deerjikists) }
+    render json: DeerjikistRepr.many(tag.deerjikists)
   end
 
   def deerjikists_by_name
@@ -199,31 +194,7 @@ class TagsController < ApplicationController
              .find_by(tag_names: { name: })
     return head :not_found unless tag
 
-    render json: { tag: TagRepr.base(tag),
-                   deerjikists: DeerjikistRepr.many(tag.deerjikists) }
-  end
-
-  def update_deerjikists
-    return head :unauthorized unless current_user
-    return head :forbidden unless current_user.gte_member?
-
-    tag = Tag.joins(:tag_name)
-             .includes(:tag_name, tag_name: :wiki_page)
-             .find_by(id: params[:id])
-    return head :not_found unless tag
-
-    ApplicationRecord.transaction do
-      tag.deerjikists = []
-      params[:_json].each do
-        platform = _1[:platform]
-        code = normalise_deerjikist_code(platform, _1[:code])
-        deerjikist = Deerjikist.find_or_initialize_by(platform:, code:)
-        deerjikist.tag = tag
-        deerjikist.save!
-      end
-    end
-
-    render json: DeerjikistRepr.many(tag.reload.deerjikists)
+    render json: DeerjikistRepr.many(tag.deerjikists)
   end
 
   def materials_by_name
@@ -365,27 +336,8 @@ class TagsController < ApplicationController
   end
 
   def update_aliases! tag, alias_names
-    alias_names = alias_names.uniq
-
-    affected_tags = [tag]
-
     current_aliases = tag.tag_name.aliases.to_a
 
-    current_aliases.each do |alias_tag_name|
-      next if alias_names.include?(alias_tag_name.name)
-
-      affected_tags << alias_tag_name.canonical&.tag
-    end
-
-    alias_names.each do |alias_name|
-      alias_tag_name = TagName.find_undiscard_or_create_by!(name: alias_name)
-      affected_tags << alias_tag_name.canonical&.tag
-    end
-
-    affected_tags.compact.uniq.each do |affected_tag|
-      TagVersioning.ensure_snapshot!(affected_tag, created_by_user: current_user)
-    end
-
     current_aliases.each do |alias_tag_name|
       next if alias_names.include?(alias_tag_name.name)
 
@@ -396,16 +348,12 @@ class TagsController < ApplicationController
       alias_tag_name = TagName.find_undiscard_or_create_by!(name: alias_name)
       alias_tag_name.update!(canonical: tag.tag_name)
     end
-
-    affected_tags.compact.uniq.each do |affected_tag|
-      record_tag_version!(affected_tag, event_type: :update, created_by_user: current_user)
-    end
   end
 
   def update_parent_tags! tag, parent_names
-    parent_tags = Tag.normalise_tags!(parent_names, with_tagme: false,
-                                                    with_no_deerjikist: false,
-                                                    deny_nico: true)
+    parent_tags = Tag.normalise_tags(parent_names, with_tagme: false,
+                                                   with_no_deerjikist: false,
+                                                   deny_nico: true)
 
     old_parent_tags = tag.parents.to_a
 
@@ -420,21 +368,4 @@ class TagsController < ApplicationController
       TagImplication.create!(tag:, parent_tag:)
     end
   end
-
-  def normalise_deerjikist_code platform, code
-    return code if platform != 'youtube' || code[0] != '@'
-
-    url = "https://www.youtube.com/#{ code }"
-
-    html = Net::HTTP.get(URI(url))
-
-    canonical = html[
-        /<link rel="canonical" href="https:\/\/www\.youtube\.com\/channel\/(UC[a-zA-Z0-9_-]{22})"/,
-        1]
-    return canonical if canonical
-
-    html[/"channelId":"(UC[a-zA-Z0-9_-]{22})"/, 1] || html[/\bUC[a-zA-Z0-9_-]{22}\b/]
-  rescue
-    nil
-  end
 end

backend/app/controllers/users_controller.rb

@@ -1,6 +1,9 @@
 class UsersController < ApplicationController
   def create
+    return head :unprocessable_entity if request.remote_ip.blank?
+
     user = nil
+
     User.transaction do
       user = User.create!(inheritance_code: SecureRandom.uuid, role: :guest)
       attach_ip_address!(user)
@@ -14,7 +17,8 @@ class UsersController < ApplicationController
   def verify
     user = User.find_by(inheritance_code: params[:code])
     return render json: { valid: false } unless user
-    return head :forbidden if user.banned?
+
+    return head :unprocessable_entity if request.remote_ip.blank?
 
     attach_ip_address!(user)
 

backend/app/models/ip_address.rb

@@ -1,10 +1,7 @@
 class IpAddress < ApplicationRecord
   validates :ip_address, presence: true, length: { maximum: 16 }
+  validates :banned, inclusion: { in: [true, false] }
 
   has_many :user_ips, dependent: :destroy
   has_many :users, through: :user_ips
-
-  def banned? = banned_at.present?
-  def ban! = banned? || update!(banned_at: Time.current)
-  def unban! = update!(banned_at: nil)
 end

backend/app/models/post.rb

@@ -1,6 +1,7 @@
 class Post < ApplicationRecord
   require 'mini_magick'
 
+  belongs_to :parent, class_name: 'Post', optional: true, foreign_key: 'parent_id'
   belongs_to :uploaded_user, class_name: 'User', optional: true
 
   has_many :post_tags, dependent: :destroy, inverse_of: :post
@@ -12,24 +13,8 @@ class Post < ApplicationRecord
   has_many :post_similarities, dependent: :delete_all
   has_many :post_versions
 
-  has_many :parent_post_implications,
-           class_name: 'PostImplication',
-           foreign_key: :post_id,
-           dependent: :destroy,
-           inverse_of: :post
-  has_many :parents, through: :parent_post_implications, source: :parent_post
-
-  has_many :child_post_implications,
-           class_name: 'PostImplication',
-           foreign_key: :parent_post_id,
-           dependent: :destroy,
-           inverse_of: :parent_post
-  has_many :children, through: :child_post_implications, source: :post
-
   has_one_attached :thumbnail
 
-  attribute :version_no, :integer, default: 1
-
   before_validation :normalise_url
 
   validates :url, presence: true, uniqueness: true
@@ -37,29 +22,17 @@ class Post < ApplicationRecord
   validate :validate_original_created_range
   validate :url_must_be_http_url
 
-  def parent_posts = parents
-
-  def child_posts = children
-
-  def sibling_posts
-    parent_post_ids = parent_posts.order(:id).pluck(:id)
-
-    parent_post_ids.to_h { [_1, PostImplication.where(parent_post: _1).map(&:post)] }
-  end
-
   def as_json options = { }
-    super(options).merge(thumbnail: thumbnail.attached? ?
-                                    Rails.application.routes.url_helpers.rails_blob_url(
-                                        thumbnail, only_path: false) :
-                                    nil)
+    super(options).merge({ thumbnail: thumbnail.attached? ?
+                                      Rails.application.routes.url_helpers.rails_blob_url(
+                                          thumbnail, only_path: false) :
+                                      nil })
   rescue
     super(options).merge(thumbnail: nil)
   end
 
   def snapshot_tag_names = tags.joins(:tag_name).order('tag_names.name').pluck('tag_names.name')
 
-  def snapshot_parent_post_ids = parents.order(:id).pluck(:id)
-
   def related limit: nil
     ids = post_similarities.order(cos: :desc)
     ids = ids.limit(limit) if limit

backend/app/models/post_implication.rb

@@ -1,19 +0,0 @@
-class PostImplication < ApplicationRecord
-  self.primary_key = :post_id, :parent_post_id
-
-  belongs_to :post, inverse_of: :parent_post_implications
-  belongs_to :parent_post, class_name: 'Post', inverse_of: :child_post_implications
-
-  validates :post_id, presence: true, uniqueness: { scope: :parent_post_id }
-  validates :parent_post_id, presence: true
-
-  validate :parent_post_mustnt_be_itself
-
-  private
-
-  def parent_post_mustnt_be_itself
-    if parent_post_id == post_id
-      errors.add :parent_post_id, '親投稿に同じ投稿を設定することはできません．'
-    end
-  end
-end

backend/app/models/tag.rb

@@ -40,8 +40,6 @@ class Tag < ApplicationRecord
   belongs_to :tag_name
   delegate :wiki_page, to: :tag_name
 
-  attribute :version_no, :integer, default: 1
-
   delegate :name, to: :tag_name, allow_nil: true
   validates :tag_name, presence: true
 
@@ -81,18 +79,15 @@ class Tag < ApplicationRecord
 
   def material_id = materials.first&.id
 
-  def has_deerjikists = deerjikists.present?
-
   def self.tagme = find_or_create_by_tag_name!('タグ希望', category: :meta)
   def self.bot = find_or_create_by_tag_name!('bot操作', category: :meta)
   def self.no_deerjikist = find_or_create_by_tag_name!('ニジラー情報不詳', category: :meta)
   def self.video = find_or_create_by_tag_name!('動画', category: :meta)
   def self.niconico = find_or_create_by_tag_name!('ニコニコ', category: :meta)
-  def self.youtube = find_or_create_by_tag_name!('YouTube', category: :meta)
 
-  def self.normalise_tags! tag_names, with_tagme: true,
-                                      with_no_deerjikist: true,
-                                      deny_nico: true
+  def self.normalise_tags tag_names, with_tagme: true,
+                                     with_no_deerjikist: true,
+                                     deny_nico: true
     if deny_nico && tag_names.any? { |n| n.downcase.start_with?('nico:') }
       raise NicoTagNormalisationError
     end

backend/app/models/user.rb

@@ -4,6 +4,7 @@ class User < ApplicationRecord
   validates :name, length: { maximum: 255 }
   validates :inheritance_code, presence: true, length: { maximum: 64 }
   validates :role, presence: true, inclusion: { in: roles.keys }
+  validates :banned, inclusion: { in: [true, false] }
 
   has_many :created_posts,
            class_name: 'Post', foreign_key: :uploaded_user_id, dependent: :nullify
@@ -18,10 +19,5 @@ class User < ApplicationRecord
            class_name: 'WikiPage', foreign_key: :updated_user_id, dependent: :nullify
 
   def viewed?(post) = user_post_views.exists?(post_id: post.id)
-
   def gte_member? = member? || admin?
-
-  def banned? = banned_at.present?
-  def ban! = banned? || update!(banned_at: Time.current)
-  def unban! = update!(banned_at: nil)
 end

backend/app/models/wiki_page.rb

@@ -15,8 +15,6 @@ class WikiPage < ApplicationRecord
 
   has_many :wiki_versions
 
-  attribute :version_no, :integer, default: 1
-
   belongs_to :tag_name
   validates :tag_name, presence: true
   validates :body, presence: true

backend/app/representations/post_repr.rb

@@ -2,8 +2,7 @@
 
 
 module PostRepr
-  BASE = { include: { tags: TagRepr::BASE, uploaded_user: UserRepr::BASE },
-           methods: [:parent_posts, :child_posts, :sibling_posts] }.freeze
+  BASE = { include: { tags: TagRepr::BASE, uploaded_user: UserRepr::BASE } }.freeze
 
   module_function
 

backend/app/representations/tag_repr.rb

@@ -3,7 +3,7 @@
 
 module TagRepr
   BASE = { only: [:id, :category, :post_count, :created_at, :updated_at],
-           methods: [:name, :has_wiki, :material_id, :has_deerjikists] }.freeze
+           methods: [:name, :has_wiki, :material_id] }.freeze
 
   module_function
 

backend/app/services/post_version_recorder.rb

@@ -24,7 +24,7 @@ class PostVersionRecorder < VersionRecorder
       url: @record.url,
       thumbnail_base: @record.thumbnail_base,
       tags: @record.snapshot_tag_names.join(' '),
-      parent_post_ids: @record.snapshot_parent_post_ids.join(' '),
+      parent_id: @record.parent_id,
       original_created_from: @record.original_created_from,
       original_created_before: @record.original_created_before }
   end

backend/app/services/version_recorder.rb

@@ -16,20 +16,19 @@ class VersionRecorder
       @record = record_class.unscoped.lock.find(@record.id)
       latest = latest_version
 
-      validate_version_sequence!(latest)
+      if !(latest) && @event_type != 'create'
+        raise "#{ version_class.name } first event must be create"
+      end
+
+      if @event_type == 'create' && latest
+        raise "#{ version_class.name } create event already exists"
+      end
 
       attrs = snapshot_attributes
 
-      if @event_type == 'update' && latest && same_snapshot?(latest, attrs)
-        return latest
-      end
+      return latest if @event_type == 'update' && latest && same_snapshot?(latest, attrs)
 
-      version = version_class.create!(
-          base_attributes(latest).merge(record_key => @record).merge(attrs))
-
-      update_record_version_no!(version.version_no)
-
-      version
+      version_class.create!(base_attributes(latest).merge(record_key => @record).merge(attrs))
     end
   end
 
@@ -46,31 +45,7 @@ class VersionRecorder
       created_by_user: @created_by_user }
   end
 
-  def update_record_version_no! version_no
-    @record.update_columns(version_no:)
-    @record.version_no = version_no
-  end
-
-  def validate_version_sequence! latest
-    if !(latest) && @event_type != 'create'
-      raise "#{ version_class.name } first event must be create"
-    end
-
-    if @event_type == 'create' && latest
-      raise "#{ version_class.name } create event already exists"
-    end
-
-    return unless latest
-
-    if @record.version_no != latest.version_no
-      raise ("#{ record_class.name }##{ @record.id } version_no is #{ @record.version_no }, " +
-             "but latest #{ version_class.name } version_no is #{ latest.version_no }")
-    end
-  end
-
-  def same_snapshot? version, attrs
-    attrs.all? { |k, v| version.public_send(k) == v }
-  end
+  def same_snapshot?(version, attrs) = attrs.all? { |k, v| version.public_send(k) == v }
 
   def validate_event_type!
     return if EVENT_TYPES.include?(@event_type)

backend/app/services/youtube/api_client.rb

@@ -1,73 +0,0 @@
-require 'json'
-require 'net/http'
-require 'uri'
-
-
-module Youtube
-  class ApiClient
-    ENDPOINT = 'https://www.googleapis.com/youtube/v3'
-
-    def initialize api_key: ENV.fetch('YOUTUBE_API_KEY')
-      @api_key = api_key
-    end
-
-    def search_videos q:, published_after: nil, published_before: nil, page_token: nil
-      get_json('/search', {
-          part:           'snippet',
-          type:           'video',
-          q:,
-          order:          'date',
-          maxResults:     50,
-          regionCode:     'JP',
-          relevanceLanguage: 'ja',
-          publishedAfter: published_after&.iso8601,
-          publishedBefore: published_before&.iso8601,
-          pageToken:      page_token }.compact)
-    end
-
-    def videos ids
-      return { 'items' => [] } if ids.empty?
-
-      get_json('/videos', part: 'snippet,status,contentDetails', id: ids.join(','))
-    end
-
-    def playlist_items playlist_id:, page_token: nil
-      get_json('/playlistItems', {
-          part:       'snippet,contentDetails,status',
-          playlistId: playlist_id,
-          maxResults: 50,
-          pageToken:  page_token }.compact)
-    end
-
-    def channel id: nil, handle: nil
-      raise ArgumentError, 'id or handle is required' if id.present? == handle.present?
-
-      params = { part: 'snippet,contentDetails' }
-      params[:id] = id if id.present?
-      params[:forHandle] = handle if handle.present?
-
-      get_json('/channels', params)
-    end
-
-    private
-
-    def get_json path, params
-      uri = URI(ENDPOINT + path)
-      uri.query = URI.encode_www_form(params.merge(key: @api_key))
-
-      response = Net::HTTP.start(uri.host,
-                                 uri.port,
-                                 use_ssl: true,
-                                 open_timeout: 10,
-                                 read_timeout: 30) do |http|
-        http.get(uri)
-      end
-
-      unless response.is_a?(Net::HTTPSuccess)
-        raise "YouTube API error: #{ response.code } #{ response.body }"
-      end
-
-      JSON.parse(response.body)
-    end
-  end
-end

backend/app/services/youtube/sync.rb

@@ -1,168 +0,0 @@
-require 'open-uri'
-require 'set'
-require 'time'
-
-
-module Youtube
-  class Sync
-    def initialize client: ApiClient.new
-      @client = client
-    end
-
-    def sync!
-      video_ids = discover_video_ids
-      return if video_ids.empty?
-
-      video_ids.each_slice(50) do |ids|
-        @client.videos(ids).fetch('items', []).each do |item|
-          sync_video!(VideoItem.new(item))
-        end
-      end
-    end
-
-    private
-
-    def discover_video_ids
-      ids = Set.new
-
-      query_terms.each do |q|
-        response = @client.search_videos(q:, published_after: sync_since)
-
-        response.fetch('items', []).each do |item|
-          video_id = item.dig('id', 'videoId')
-          ids << video_id if video_id.present?
-        end
-      end
-
-      playlist_ids.each do |playlist_id|
-        each_playlist_item(playlist_id) do |item|
-          video_id = item.dig('contentDetails', 'videoId')
-          video_id ||= item.dig('snippet', 'resourceId', 'videoId')
-
-          ids << video_id if video_id.present?
-        end
-      end
-
-      ids.to_a
-    end
-
-    def sync_video! video
-      post = Post.where('url REGEXP ?', youtube_url_regexp(video.id)).first
-
-      original_created_from = video.published_at.change(sec: 0)
-      original_created_before = original_created_from + 1.minute
-
-      post_created = false
-      post_changed = false
-
-      if post
-        post.assign_attributes(title: video.title,
-                               original_created_from:,
-                               original_created_before:,
-                               thumbnail_base: video.thumbnail_url)
-
-        post_changed = post.changed?
-        post.save! if post_changed
-
-        attach_thumbnail_if_needed!(post, video.thumbnail_url)
-      else
-        post_created = true
-        post = Post.create!(
-            title: video.title,
-            url: video.url,
-            thumbnail_base: video.thumbnail_url,
-            uploaded_user_id: nil,
-            original_created_from:,
-            original_created_before:)
-
-        attach_thumbnail_if_needed!(post, video.thumbnail_url)
-
-        sync_post_tags!(post, [Tag.tagme.id, Tag.bot.id, Tag.youtube.id, Tag.video.id])
-      end
-
-      kept_tag_ids = post.tags.pluck(:id).to_set
-      desired_tag_ids = kept_tag_ids.to_a
-
-      deerjikist = Deerjikist.find_by(platform: :youtube, code: video.channel_id)
-      if deerjikist
-        desired_tag_ids.delete(Tag.no_deerjikist.id)
-        desired_tag_ids << deerjikist.tag_id
-      elsif post.tags.where(category: :deerjikist).none?
-        desired_tag_ids << Tag.no_deerjikist.id
-      end
-
-      desired_tag_ids.uniq!
-
-      sync_post_tags!(post, desired_tag_ids, current_tag_ids: kept_tag_ids)
-
-      if post_created
-        PostVersionRecorder.record!(post:, event_type: :create, created_by_user: nil)
-      elsif post_changed || kept_tag_ids != desired_tag_ids.to_set
-        PostVersionRecorder.ensure_snapshot!(post, created_by_user: nil)
-        PostVersionRecorder.record!(post:, event_type: :update, created_by_user: nil)
-      end
-    end
-
-    def sync_post_tags! post, desired_tag_ids, current_tag_ids: nil
-      current_tag_ids ||= PostTag.kept.where(post_id: post.id).pluck(:tag_id).to_set
-      desired_tag_ids = desired_tag_ids.compact.to_set
-
-      to_add = desired_tag_ids - current_tag_ids
-      to_remove = current_tag_ids - desired_tag_ids
-
-      Tag.where(id: to_add.to_a).find_each do |tag|
-        begin
-          PostTag.create!(post:, tag:)
-        rescue ActiveRecord::RecordNotUnique
-          ;
-        end
-      end
-
-      PostTag.where(post_id: post.id, tag_id: to_remove.to_a).kept.find_each do |pt|
-        pt.discard_by!(nil)
-      end
-    end
-
-    def attach_thumbnail_if_needed! post, thumbnail_url
-      return if post.thumbnail.attached?
-      return if thumbnail_url.blank?
-
-      post.thumbnail.attach(
-          io:           URI.open(thumbnail_url),
-          filename:     File.basename(URI.parse(thumbnail_url).path),
-          content_type: 'image/jpeg')
-
-      post.resized_thumbnail!
-    end
-
-    def youtube_url_regexp id
-      escaped = Regexp.escape(id)
-      "(youtube\\.com/watch\\?v=#{ escaped }|youtu\\.be/#{ escaped })([^A-Za-z0-9_-]|$)"
-    end
-
-    def query_terms = ['ぼざろクリーチャーシリーズ', '伊地知ニジカ', '伊地知虹鹿']
-
-    def playlist_ids
-      ['PLrOch4zHkI5vu29b-f9umUQQ4tQkuWLPX',
-       'PLrOch4zHkI5vOK0RaytQq6PbucxQkkL0K',
-       'PLrOch4zHkI5tdwm9vSegiDQJOM-hgpcOC']
-    end
-
-    def sync_since = 14.days.ago
-
-    def each_playlist_item playlist_id
-      page_token = nil
-
-      loop do
-        response = @client.playlist_items(playlist_id:, page_token:)
-
-        response.fetch('items', []).each do |item|
-          yield item
-        end
-
-        page_token = response['nextPageToken']
-        break if page_token.blank?
-      end
-    end
-  end
-end

backend/app/services/youtube/video_item.rb

@@ -1,32 +0,0 @@
-require 'time'
-
-
-module Youtube
-  class VideoItem
-    attr_reader :id, :title, :channel_id, :published_at, :thumbnail_url, :raw_tags
-
-    def initialize item
-      snippet = item.fetch('snippet')
-
-      @id = item.fetch('id')
-      @title = snippet['title']
-      @channel_id = snippet['channelId']
-      @published_at = Time.iso8601(snippet['publishedAt'])
-      @thumbnail_url = pick_thumbnail(snippet['thumbnails'] || { })
-      @raw_tags = snippet['tags'] || []
-    end
-
-    def url = "https://www.youtube.com/watch?v=#{ @id }"
-
-    private
-
-    def pick_thumbnail thumbnails
-      ['maxres', 'standard', 'high', 'medium', 'default'].each do |key|
-        url = thumbnails.dig(key, 'url')
-        return url if url.present?
-      end
-
-      nil
-    end
-  end
-end

backend/config/routes.rb

@@ -24,7 +24,6 @@ Rails.application.routes.draw do
       patch '', action: :update
 
       get :deerjikists
-      put :deerjikists, action: :update_deerjikists
     end
   end
 

backend/config/schedule.rb

@@ -17,11 +17,3 @@ every 1.day, at: '0:00 am' do
   rake 'post_similarity:calc', environment: 'production'
   rake 'tag_similarity:calc', environment: 'production'
 end
-
-every 1.day, at: '7:50 am' do
-  rake 'nico:export', environment: 'production'
-end
-
-every :hour do
-  rake 'post:sync', environment: 'production'
-end

backend/db/migrate/20260427214800_create_post_implications.rb

@@ -1,24 +0,0 @@
-class CreatePostImplications < ActiveRecord::Migration[8.0]
-  def up
-    create_table :post_implications, primary_key: [:post_id, :parent_post_id] do |t|
-      t.references :post, null: false, foreign_key: true, index: false
-      t.references :parent_post, null: false, foreign_key: { to_table: :posts }
-      t.timestamps
-
-      t.check_constraint 'post_id <> parent_post_id',
-                         name: 'chk_post_implications_no_self'
-    end
-
-    add_column :post_versions, :parent_post_ids, :text, null: false, after: :parent_id
-    remove_column :post_versions, :parent_id, :bigint
-    remove_reference :posts, :parent, foreign_key: { to_table: :posts }
-  end
-
-  def down
-    add_reference :posts, :parent, foreign_key: { to_table: :posts }, after: :thumbnail_base
-    add_column :post_versions, :parent_id, :bigint, after: :post_id
-    remove_column :post_versions, :parent_post_ids, :text
-
-    drop_table :post_implications
-  end
-end

backend/db/migrate/20260501153900_rename_banned_to_banned_at_in_users_and_ip_addresses.rb

@@ -1,16 +0,0 @@
-class RenameBannedToBannedAtInUsersAndIpAddresses < ActiveRecord::Migration[8.0]
-  def up
-    [:users, :ip_addresses].each do
-      add_column _1, :banned_at, :datetime, after: :banned
-      add_index _1, :banned_at
-      remove_column _1, :banned
-    end
-  end
-
-  def down
-    [:ip_addresses, :users].each do
-      add_column _1, :banned, :boolean, null: false, default: false, after: :banned_at
-      remove_column _1, :banned_at
-    end
-  end
-end

backend/db/migrate/20260507124000_add_version_no_to_posts.rb

@@ -1,27 +0,0 @@
-class AddVersionNoToPosts < ActiveRecord::Migration[8.0]
-  def up
-    add_column :posts, :version_no, :integer
-
-    execute <<~SQL
-      UPDATE
-        posts
-      SET
-        version_no = (
-          SELECT
-            MAX(version_no)
-          FROM
-            post_versions
-          WHERE
-            post_id = posts.id)
-    SQL
-
-    change_column_null :posts, :version_no, false
-
-    add_check_constraint :posts, 'version_no > 0', name: 'chk_posts_version_no_positive'
-  end
-
-  def down
-    remove_check_constraint :posts, name: 'chk_posts_version_no_positive'
-    remove_column :posts, :version_no
-  end
-end

backend/db/migrate/20260507211600_add_version_no_to_tags.rb

@@ -1,37 +0,0 @@
-class AddVersionNoToTags < ActiveRecord::Migration[8.0]
-  def up
-    add_column :tags, :version_no, :integer
-
-    execute <<~SQL
-      UPDATE
-        tags
-      SET
-        version_no = (
-          CASE category
-          WHEN 'nico' THEN
-            (SELECT
-               MAX(version_no)
-             FROM
-               nico_tag_versions
-             WHERE
-               tag_id = tags.id)
-          ELSE
-            (SELECT
-               MAX(version_no)
-             FROM
-               tag_versions
-             WHERE
-               tag_id = tags.id)
-          END)
-    SQL
-
-    change_column_null :tags, :version_no, false
-
-    add_check_constraint :tags, 'version_no > 0', name: 'chk_tags_version_no_positive'
-  end
-
-  def down
-    remove_check_constraint :tags, name: 'chk_tags_version_no_positive'
-    remove_column :tags, :version_no
-  end
-end

backend/db/migrate/20260507213300_add_version_no_to_wiki_pages.rb

@@ -1,27 +0,0 @@
-class AddVersionNoToWikiPages < ActiveRecord::Migration[8.0]
-  def up
-    add_column :wiki_pages, :version_no, :integer
-
-    execute <<~SQL
-      UPDATE
-        wiki_pages
-      SET
-        version_no = (
-          SELECT
-            MAX(version_no)
-          FROM
-            wiki_versions
-          WHERE
-            wiki_page_id = wiki_pages.id)
-    SQL
-
-    change_column_null :wiki_pages, :version_no, false
-
-    add_check_constraint :wiki_pages, 'version_no > 0', name: 'chk_wiki_pages_version_no_positive'
-  end
-
-  def down
-    remove_check_constraint :wiki_pages, name: 'chk_wiki_pages_version_no_positive'
-    remove_column :wiki_pages, :version_no
-  end
-end

backend/db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.0].define(version: 2026_05_07_213300) do
+ActiveRecord::Schema[8.0].define(version: 2026_04_26_120600) do
   create_table "active_storage_attachments", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.string "name", null: false
     t.string "record_type", null: false
@@ -50,10 +50,9 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_07_213300) do
 
   create_table "ip_addresses", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.binary "ip_address", limit: 16, null: false
-    t.datetime "banned_at"
+    t.boolean "banned", default: false, null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
-    t.index ["banned_at"], name: "index_ip_addresses_on_banned_at"
     t.index ["ip_address"], name: "index_ip_addresses_on_ip_address", unique: true
   end
 
@@ -120,15 +119,6 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_07_213300) do
     t.check_constraint "`version_no` > 0", name: "nico_tag_versions_version_no_positive"
   end
 
-  create_table "post_implications", primary_key: ["post_id", "parent_post_id"], charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
-    t.bigint "post_id", null: false
-    t.bigint "parent_post_id", null: false
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
-    t.index ["parent_post_id"], name: "index_post_implications_on_parent_post_id"
-    t.check_constraint "`post_id` <> `parent_post_id`", name: "chk_post_implications_no_self"
-  end
-
   create_table "post_similarities", primary_key: ["post_id", "target_post_id"], charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.bigint "post_id", null: false
     t.bigint "target_post_id", null: false
@@ -165,12 +155,13 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_07_213300) do
     t.string "url", limit: 768, null: false
     t.string "thumbnail_base", limit: 2000
     t.text "tags", null: false
-    t.text "parent_post_ids", null: false
+    t.bigint "parent_id"
     t.datetime "original_created_from"
     t.datetime "original_created_before"
     t.datetime "created_at", null: false
     t.bigint "created_by_user_id"
     t.index ["created_by_user_id"], name: "index_post_versions_on_created_by_user_id"
+    t.index ["parent_id"], name: "index_post_versions_on_parent_id"
     t.index ["post_id", "version_no"], name: "index_post_versions_on_post_id_and_version_no", unique: true
     t.index ["post_id"], name: "index_post_versions_on_post_id"
     t.check_constraint "`event_type` in (_utf8mb4'create',_utf8mb4'update',_utf8mb4'discard',_utf8mb4'restore')", name: "post_versions_event_type_valid"
@@ -181,15 +172,15 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_07_213300) do
     t.string "title"
     t.string "url", limit: 768, null: false
     t.string "thumbnail_base", limit: 2000
+    t.bigint "parent_id"
     t.bigint "uploaded_user_id"
     t.datetime "created_at", null: false
     t.datetime "original_created_from"
     t.datetime "original_created_before"
     t.datetime "updated_at", null: false
-    t.integer "version_no", null: false
+    t.index ["parent_id"], name: "index_posts_on_parent_id"
     t.index ["uploaded_user_id"], name: "index_posts_on_uploaded_user_id"
     t.index ["url"], name: "index_posts_on_url", unique: true
-    t.check_constraint "`version_no` > 0", name: "chk_posts_version_no_positive"
   end
 
   create_table "settings", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
@@ -264,10 +255,8 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_07_213300) do
     t.datetime "updated_at", null: false
     t.integer "post_count", default: 0, null: false
     t.datetime "discarded_at"
-    t.integer "version_no", null: false
     t.index ["discarded_at"], name: "index_tags_on_discarded_at"
     t.index ["tag_name_id"], name: "index_tags_on_tag_name_id", unique: true
-    t.check_constraint "`version_no` > 0", name: "chk_tags_version_no_positive"
   end
 
   create_table "theatre_comments", primary_key: ["theatre_id", "no"], charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
@@ -337,10 +326,9 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_07_213300) do
     t.string "name"
     t.string "inheritance_code", limit: 64, null: false
     t.string "role", null: false
-    t.datetime "banned_at"
+    t.boolean "banned", default: false, null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
-    t.index ["banned_at"], name: "index_users_on_banned_at"
   end
 
   create_table "wiki_assets", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
@@ -373,12 +361,10 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_07_213300) do
     t.datetime "updated_at", null: false
     t.datetime "discarded_at"
     t.integer "next_asset_no", default: 1, null: false
-    t.integer "version_no", null: false
     t.index ["created_user_id"], name: "index_wiki_pages_on_created_user_id"
     t.index ["discarded_at"], name: "index_wiki_pages_on_discarded_at"
     t.index ["tag_name_id"], name: "index_wiki_pages_on_tag_name_id", unique: true
     t.index ["updated_user_id"], name: "index_wiki_pages_on_updated_user_id"
-    t.check_constraint "`version_no` > 0", name: "chk_wiki_pages_version_no_positive"
   end
 
   create_table "wiki_revision_lines", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
@@ -442,8 +428,6 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_07_213300) do
   add_foreign_key "nico_tag_relations", "tags", column: "nico_tag_id"
   add_foreign_key "nico_tag_versions", "tags"
   add_foreign_key "nico_tag_versions", "users", column: "created_by_user_id"
-  add_foreign_key "post_implications", "posts"
-  add_foreign_key "post_implications", "posts", column: "parent_post_id"
   add_foreign_key "post_similarities", "posts"
   add_foreign_key "post_similarities", "posts", column: "target_post_id"
   add_foreign_key "post_tags", "posts"
@@ -451,7 +435,9 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_07_213300) do
   add_foreign_key "post_tags", "users", column: "created_user_id"
   add_foreign_key "post_tags", "users", column: "deleted_user_id"
   add_foreign_key "post_versions", "posts"
+  add_foreign_key "post_versions", "posts", column: "parent_id"
   add_foreign_key "post_versions", "users", column: "created_by_user_id"
+  add_foreign_key "posts", "posts", column: "parent_id"
   add_foreign_key "posts", "users", column: "uploaded_user_id"
   add_foreign_key "settings", "users"
   add_foreign_key "tag_implications", "tags"

backend/lib/tasks/sync_posts.rake

@@ -1,6 +0,0 @@
-namespace :post do
-  desc '投稿同期（ニコニコ以外）'
-  task sync: :environment do
-    Youtube::Sync.new.sync!
-  end
-end

backend/spec/factories/ip_addresses.rb

@@ -1,10 +0,0 @@
-FactoryBot.define do
-  factory :ip_address do
-    ip_address { IPAddr.new('203.0.113.10').hton }
-    banned_at { nil }
-
-    trait :banned do
-      banned_at { Time.current }
-    end
-  end
-end

backend/spec/factories/users.rb

@@ -1,24 +1,15 @@
 FactoryBot.define do
   factory :user do
-    name { nil }
+    name { "test-user" }
     inheritance_code { SecureRandom.uuid }
-    role { 'guest' }
-    banned_at { nil }
-
-    trait :guest do
-      role { 'guest' }
-    end
+    role { "guest" }
 
     trait :member do
-      role { 'member' }
+      role { "member" }
     end
 
     trait :admin do
       role { 'admin' }
     end
-
-    trait :banned do
-      banned_at { Time.current }
-    end
   end
 end

backend/spec/models/post_implication_spec.rb

@@ -1,51 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe PostImplication, type: :model do
-  let!(:post_record) do
-    Post.create!(
-      title: 'post',
-      url: 'https://example.com/post-implication-post'
-    )
-  end
-
-  let!(:parent_post) do
-    Post.create!(
-      title: 'parent post',
-      url: 'https://example.com/post-implication-parent'
-    )
-  end
-
-  it 'is valid with post and parent_post' do
-    implication = described_class.new(
-      post: post_record,
-      parent_post:
-    )
-
-    expect(implication).to be_valid
-  end
-
-  it 'does not allow same post as parent_post' do
-    implication = described_class.new(
-      post: post_record,
-      parent_post: post_record
-    )
-
-    expect(implication).not_to be_valid
-    expect(implication.errors[:parent_post_id]).to be_present
-  end
-
-  it 'does not allow duplicate pair' do
-    described_class.create!(
-      post: post_record,
-      parent_post:
-    )
-
-    duplicate = described_class.new(
-      post: post_record,
-      parent_post:
-    )
-
-    expect(duplicate).not_to be_valid
-    expect(duplicate.errors[:post_id]).to be_present
-  end
-end

backend/spec/models/post_version_spec.rb

@@ -19,7 +19,7 @@ RSpec.describe PostVersion, type: :model do
       url: post_record.url,
       thumbnail_base: post_record.thumbnail_base,
       tags: post_record.snapshot_tag_names.join(' '),
-      parent_post_ids: post_record.snapshot_parent_post_ids.join(' '),
+      parent: post_record.parent,
       original_created_from: post_record.original_created_from,
       original_created_before: post_record.original_created_before,
       created_at: Time.current,

backend/spec/models/tag_spec.rb

@@ -161,7 +161,7 @@ RSpec.describe Tag, type: :model do
         url: post.url,
         thumbnail_base: post.thumbnail_base,
         tags: snapshot_tags(post),
-        parent_post_ids: post.snapshot_parent_post_ids.join(' '),
+        parent: post.parent,
         original_created_from: post.original_created_from,
         original_created_before: post.original_created_before,
         created_at: Time.current,

backend/spec/requests/tag_versions_spec.rb

@@ -26,22 +26,17 @@ RSpec.describe 'TagVersions API', type: :request do
     created_by_user:,
     created_at:
   )
-    version =
-        TagVersion.create!(
-            tag: tag,
-            version_no: version_no,
-            event_type: event_type,
-            name: name,
-            category: category,
-            aliases: Array(aliases).join(' '),
-            parent_tag_ids: Array(parent_tags).map(&:id).join(' '),
-            created_by_user: created_by_user,
-            created_at: created_at)
-
-    tag.update_columns(version_no: version_no) if tag.has_attribute?(:version_no)
-    tag.version_no = version_no if tag.respond_to?(:version_no=)
-
-    version
+    TagVersion.create!(
+      tag: tag,
+      version_no: version_no,
+      event_type: event_type,
+      name: name,
+      category: category,
+      aliases: Array(aliases).join(' '),
+      parent_tag_ids: Array(parent_tags).map(&:id).join(' '),
+      created_by_user: created_by_user,
+      created_at: created_at
+    )
   end
 
   let!(:v1) do

backend/spec/requests/tags_deerjikists_spec.rb

@@ -8,35 +8,23 @@ RSpec.describe 'Tags deerjikists API', type: :request do
 
   let!(:tag) { create(:tag, category: :deerjikist) }
 
-  let(:member) { create(:user, :member) }
-  let(:guest) { create(:user, role: :guest) }
-
   before do
+    # show_by_name / deerjikists_by_name 用に名前を固定
     tag.tag_name.update!(name: 'deerjika')
   end
 
   describe 'GET /tags/:id/deerjikists' do
     subject(:do_request) do
-      get "/tags/#{tag_id}/deerjikists"
+      get "/tags/#{ tag_id }/deerjikists"
     end
 
     let(:tag_id) { tag.id }
 
     context 'when tag exists and has no deerjikists' do
-      it 'returns 200 with tag and empty deerjikists array' do
+      it 'returns 200 and empty array' do
         do_request
-
         expect(response).to have_http_status(:ok)
-
-        expect(json).to be_a(Hash)
-
-        expect(json['tag']).to be_a(Hash)
-        expect(json['tag']['id']).to eq(tag.id)
-        expect(json['tag']['name']).to eq('deerjika')
-        expect(json['tag']['category']).to eq('deerjikist')
-        expect(json['tag']['has_deerjikists']).to eq(false)
-
-        expect(json['deerjikists']).to eq([])
+        expect(json).to eq([])
       end
     end
 
@@ -46,27 +34,17 @@ RSpec.describe 'Tags deerjikists API', type: :request do
         Deerjikist.create!(platform: platform2, code: code2, tag: tag)
       end
 
-      it 'returns 200 with tag and deerjikists array' do
+      it 'returns 200 and deerjikists array' do
         do_request
-
         expect(response).to have_http_status(:ok)
 
-        expect(json).to be_a(Hash)
+        expect(json).to be_a(Array)
+        expect(json.size).to eq(2)
 
-        expect(json['tag']).to be_a(Hash)
-        expect(json['tag']['id']).to eq(tag.id)
-        expect(json['tag']['name']).to eq('deerjika')
-        expect(json['tag']['category']).to eq('deerjikist')
-        expect(json['tag']['has_deerjikists']).to eq(true)
-
-        expect(json['deerjikists']).to be_a(Array)
-        expect(json['deerjikists'].size).to eq(2)
-
-        expect(json['deerjikists'].map { |h| [h['platform'], h['code']] })
-          .to contain_exactly(
-            [platform1, code1],
-            [platform2, code2],
-          )
+        expect(json.map { |h| [h['platform'], h['code']] }).to contain_exactly(
+          [platform1, code1],
+          [platform2, code2],
+        )
       end
     end
 
@@ -75,7 +53,6 @@ RSpec.describe 'Tags deerjikists API', type: :request do
 
       it 'returns 404' do
         do_request
-
         expect(response).to have_http_status(:not_found)
       end
     end
@@ -83,7 +60,7 @@ RSpec.describe 'Tags deerjikists API', type: :request do
 
   describe 'GET /tags/name/:name/deerjikists' do
     subject(:do_request) do
-      get "/tags/name/#{name}/deerjikists"
+      get "/tags/name/#{ name }/deerjikists"
     end
 
     let(:name) { 'deerjika' }
@@ -93,7 +70,6 @@ RSpec.describe 'Tags deerjikists API', type: :request do
 
       it 'returns 400' do
         do_request
-
         expect(response).to have_http_status(:bad_request)
       end
     end
@@ -103,209 +79,23 @@ RSpec.describe 'Tags deerjikists API', type: :request do
 
       it 'returns 404' do
         do_request
-
         expect(response).to have_http_status(:not_found)
       end
     end
 
-    context 'when tag exists and has no deerjikists' do
-      it 'returns 200 with tag and empty deerjikists array' do
-        do_request
-
-        expect(response).to have_http_status(:ok)
-
-        expect(json).to be_a(Hash)
-
-        expect(json['tag']).to be_a(Hash)
-        expect(json['tag']['id']).to eq(tag.id)
-        expect(json['tag']['name']).to eq('deerjika')
-        expect(json['tag']['category']).to eq('deerjikist')
-        expect(json['tag']['has_deerjikists']).to eq(false)
-
-        expect(json['deerjikists']).to eq([])
-      end
-    end
-
     context 'when tag exists and has deerjikists' do
       before do
         Deerjikist.create!(platform: platform1, code: code1, tag: tag)
       end
 
-      it 'returns 200 with tag and deerjikists array' do
+      it 'returns 200 and deerjikists array' do
         do_request
-
         expect(response).to have_http_status(:ok)
 
-        expect(json).to be_a(Hash)
-
-        expect(json['tag']).to be_a(Hash)
-        expect(json['tag']['id']).to eq(tag.id)
-        expect(json['tag']['name']).to eq('deerjika')
-        expect(json['tag']['category']).to eq('deerjikist')
-        expect(json['tag']['has_deerjikists']).to eq(true)
-
-        expect(json['deerjikists']).to be_a(Array)
-        expect(json['deerjikists'].size).to eq(1)
-
-        expect(json['deerjikists'][0]['platform']).to eq(platform1)
-        expect(json['deerjikists'][0]['code']).to eq(code1)
-      end
-    end
-  end
-
-  describe 'PUT /tags/:id/deerjikists' do
-    subject(:do_request) do
-      put "/tags/#{tag_id}/deerjikists", params: payload, as: :json
-    end
-
-    let(:tag_id) { tag.id }
-    let(:payload) do
-      [
-        { platform: platform1, code: code1 },
-        { platform: platform2, code: code2 },
-      ]
-    end
-
-    context 'when not logged in' do
-      it 'returns 401' do
-        do_request
-
-        expect(response).to have_http_status(:unauthorized)
-      end
-    end
-
-    context 'when logged in but not member' do
-      before do
-        sign_in_as guest
-      end
-
-      it 'returns 403' do
-        do_request
-
-        expect(response).to have_http_status(:forbidden)
-      end
-    end
-
-    context 'when tag does not exist' do
-      let(:tag_id) { 9_999_999 }
-
-      before do
-        sign_in_as member
-      end
-
-      it 'returns 404' do
-        do_request
-
-        expect(response).to have_http_status(:not_found)
-      end
-    end
-
-    context 'when logged in as member' do
-      before do
-        sign_in_as member
-      end
-
-      context 'when tag has no deerjikists' do
-        it 'creates deerjikists and returns deerjikists array' do
-          expect {
-            do_request
-          }.to change { Deerjikist.where(tag: tag).count }.from(0).to(2)
-
-          expect(response).to have_http_status(:ok)
-
-          expect(json).to be_a(Array)
-          expect(json.map { |h| [h['platform'], h['code']] })
-            .to contain_exactly(
-              [platform1, code1],
-              [platform2, code2],
-            )
-
-          expect(Deerjikist.where(tag: tag).map { |d| [d.platform, d.code] })
-            .to contain_exactly(
-              [platform1, code1],
-              [platform2, code2],
-            )
-        end
-      end
-
-      context 'when tag already has deerjikists' do
-        before do
-          Deerjikist.create!(platform: platform1, code: 'old-code-1', tag: tag)
-          Deerjikist.create!(platform: platform2, code: 'old-code-2', tag: tag)
-        end
-
-        it 'replaces deerjikists and returns deerjikists array' do
-          do_request
-
-          expect(response).to have_http_status(:ok)
-
-          expect(Deerjikist.where(tag: tag).map { |d| [d.platform, d.code] })
-            .to contain_exactly(
-              [platform1, code1],
-              [platform2, code2],
-            )
-
-          expect(Deerjikist.exists?(platform: platform1, code: 'old-code-1')).to eq(false)
-          expect(Deerjikist.exists?(platform: platform2, code: 'old-code-2')).to eq(false)
-
-          expect(json).to be_a(Array)
-          expect(json.map { |h| [h['platform'], h['code']] })
-            .to contain_exactly(
-              [platform1, code1],
-              [platform2, code2],
-            )
-        end
-      end
-
-      context 'when payload is empty array' do
-        let(:payload) { [] }
-
-        before do
-          Deerjikist.create!(platform: platform1, code: code1, tag: tag)
-          Deerjikist.create!(platform: platform2, code: code2, tag: tag)
-        end
-
-        it 'clears deerjikists and returns empty array' do
-          expect {
-            do_request
-          }.to change { Deerjikist.where(tag: tag).count }.from(2).to(0)
-
-          expect(response).to have_http_status(:ok)
-          expect(json).to eq([])
-        end
-      end
-
-      context 'when youtube code is handle' do
-        let(:channel_id) { 'UCabcdefghijklmnopqrstuv' }
-        let(:payload) do
-          [
-            { platform: 'youtube', code: '@deerjika' },
-          ]
-        end
-
-        before do
-          allow(Net::HTTP).to receive(:get).and_return(
-            %(<link rel="canonical" href="https://www.youtube.com/channel/#{channel_id}">),
-          )
-        end
-
-        it 'normalises youtube handle to channel id' do
-          expect {
-            do_request
-          }.to change { Deerjikist.where(tag: tag).count }.from(0).to(1)
-
-          expect(response).to have_http_status(:ok)
-
-          expect(Net::HTTP).to have_received(:get)
-
-          expect(Deerjikist.exists?(platform: 'youtube', code: channel_id, tag: tag))
-            .to eq(true)
-
-          expect(json).to be_a(Array)
-          expect(json.size).to eq(1)
-          expect(json[0]['platform']).to eq('youtube')
-          expect(json[0]['code']).to eq(channel_id)
-        end
+        expect(json).to be_a(Array)
+        expect(json.size).to eq(1)
+        expect(json[0]['platform']).to eq(platform1)
+        expect(json[0]['code']).to eq(code1)
       end
     end
   end

backend/spec/requests/tags_spec.rb

@@ -964,6 +964,8 @@ RSpec.describe 'Tags API', type: :request do
       end
 
       it '別名を他 tag から奪った場合、奪はれた側の tag version も作成する' do
+        pending '#329 で対応予定'
+
         old_owner = Tag.create!(
           tag_name: TagName.create!(name: 'put_alias_old_owner'),
           category: :general

backend/spec/requests/users_spec.rb

@@ -1,266 +1,109 @@
-require 'rails_helper'
-
-RSpec.describe 'Users', type: :request do
-  let(:remote_ip) { '203.0.113.10' }
-
-  before do
-    allow_any_instance_of(ActionDispatch::Request)
-      .to receive(:remote_ip)
-      .and_return(remote_ip)
-  end
-
-  def auth_headers(user)
-    { 'X-Transfer-Code' => user.inheritance_code }
-  end
-
-  describe 'POST /users' do
-    it 'creates guest user, IpAddress and UserIp, and returns code' do
-      expect {
-        post '/users'
-      }.to change(User, :count).by(1)
-        .and change(IpAddress, :count).by(1)
-        .and change(UserIp, :count).by(1)
+require "rails_helper"
 
+RSpec.describe "Users", type: :request do
+  describe "POST /users" do
+    it "creates guest user and returns code" do
+      post "/users"
       expect(response).to have_http_status(:created)
-      expect(json['code']).to be_present
-      expect(json['user']['role']).to eq('guest')
-
-      user = User.last
-      ip_address = IpAddress.find_by(ip_address: IPAddr.new(remote_ip).hton)
-
-      expect(user.role).to eq('guest')
-      expect(ip_address).to be_present
-      expect(UserIp.exists?(user:, ip_address:)).to eq(true)
-    end
-
-    it 'returns 403 and does not create user when current IP address is banned' do
-      IpAddress.create!(
-        ip_address: IPAddr.new(remote_ip).hton,
-        banned_at: Time.current
-      )
-
-      expect {
-        post '/users'
-      }.not_to change(User, :count)
-
-      expect(response).to have_http_status(:forbidden)
-      expect(UserIp.count).to eq(0)
+      expect(json["code"]).to be_present
+      expect(json["user"]["role"]).to eq("guest")
     end
   end
 
-  describe 'POST /users/code/renew' do
-    it 'returns 401 when not logged in' do
-      post '/users/code/renew'
-
+  describe "POST /users/code/renew" do
+    it "returns 401 when not logged in" do
+      sign_out
+      post "/users/code/renew"
       expect(response).to have_http_status(:unauthorized)
     end
-
-    it 'returns 403 when current user is banned' do
-      user = create(:user, :banned)
-
-      post '/users/code/renew', headers: auth_headers(user)
-
-      expect(response).to have_http_status(:forbidden)
-    end
-
-    it 'returns 403 when current IP address is banned' do
-      user = create(:user)
-
-      IpAddress.create!(
-        ip_address: IPAddr.new(remote_ip).hton,
-        banned_at: Time.current
-      )
-
-      post '/users/code/renew', headers: auth_headers(user)
-
-      expect(response).to have_http_status(:forbidden)
-    end
   end
 
-  describe 'PUT /users/:id' do
-    let(:user) { create(:user, name: 'old-name', role: 'guest') }
-
-    it 'returns 401 when current_user id mismatch' do
-      other_user = create(:user)
-
-      put "/users/#{user.id}",
-          params: { name: 'new-name' },
-          headers: auth_headers(other_user)
+  describe "PUT /users/:id" do
+    let(:user) { create(:user, name: "old-name", role: "guest") }
 
+    it "returns 401 when current_user id mismatch" do
+      sign_in_as(create(:user))
+      put "/users/#{user.id}", params: { name: "new-name" }
       expect(response).to have_http_status(:unauthorized)
     end
 
-    it 'returns 400 when name is blank' do
-      put "/users/#{user.id}",
-          params: { name: '   ' },
-          headers: auth_headers(user)
-
+    it "returns 400 when name is blank" do
+      sign_in_as(user)
+      put "/users/#{user.id}", params: { name: "   " }
       expect(response).to have_http_status(:bad_request)
     end
 
-    it 'updates name and returns user slice' do
-      put "/users/#{user.id}",
-          params: { name: 'new-name' },
-          headers: auth_headers(user)
+    it "updates name and returns 201 with user slice" do
+      sign_in_as(user)
+      put "/users/#{user.id}", params: { name: "new-name" }
 
       expect(response).to have_http_status(:ok)
-      expect(json['id']).to eq(user.id)
-      expect(json['name']).to eq('new-name')
+      expect(json["id"]).to eq(user.id)
+      expect(json["name"]).to eq("new-name")
 
       user.reload
-      expect(user.name).to eq('new-name')
-    end
-
-    it 'returns 403 when current user is banned' do
-      user.update!(banned_at: Time.current)
-
-      put "/users/#{user.id}",
-          params: { name: 'new-name' },
-          headers: auth_headers(user)
-
-      expect(response).to have_http_status(:forbidden)
-
-      user.reload
-      expect(user.name).to eq('old-name')
-    end
-
-    it 'returns 403 when current IP address is banned' do
-      IpAddress.create!(
-        ip_address: IPAddr.new(remote_ip).hton,
-        banned_at: Time.current
-      )
-
-      put "/users/#{user.id}",
-          params: { name: 'new-name' },
-          headers: auth_headers(user)
-
-      expect(response).to have_http_status(:forbidden)
-
-      user.reload
-      expect(user.name).to eq('old-name')
+      expect(user.name).to eq("new-name")
     end
   end
 
-  describe 'POST /users/verify' do
-    it 'returns valid:false when code not found' do
-      post '/users/verify', params: { code: 'nope' }
-
+  describe "POST /users/verify" do
+    it "returns valid:false when code not found" do
+      post "/users/verify", params: { code: "nope" }
       expect(response).to have_http_status(:ok)
-      expect(json['valid']).to eq(false)
+      expect(json["valid"]).to eq(false)
     end
 
-    it 'returns 403 when current IP address is banned' do
-      user = create(:user, inheritance_code: SecureRandom.uuid, role: 'guest')
+    it "creates IpAddress and UserIp, and returns valid:true with user slice" do
+      user = create(:user, inheritance_code: SecureRandom.uuid, role: "guest")
 
-      IpAddress.create!(
-        ip_address: IPAddr.new(remote_ip).hton,
-        banned_at: Time.current
-      )
+      # request.remote_ip を固定
+      allow_any_instance_of(ActionDispatch::Request).to receive(:remote_ip).and_return("203.0.113.10")
 
       expect {
-        post '/users/verify', params: { code: user.inheritance_code }
-      }.not_to change(UserIp, :count)
-
-      expect(response).to have_http_status(:forbidden)
-    end
-
-    it 'returns 403 when verified user is banned' do
-      user = create(
-        :user,
-        :banned,
-        inheritance_code: SecureRandom.uuid,
-        role: 'guest'
-      )
-
-      expect {
-        post '/users/verify', params: { code: user.inheritance_code }
-      }.not_to change(UserIp, :count)
-
-      expect(response).to have_http_status(:forbidden)
-    end
-
-    it 'creates IpAddress and UserIp, and returns valid:true with user slice' do
-      user = create(:user, inheritance_code: SecureRandom.uuid, role: 'guest')
-
-      expect {
-        post '/users/verify', params: { code: user.inheritance_code }
-      }.to change(UserIp, :count).by(1)
-        .and change(IpAddress, :count).by(1)
-
-      expect(response).to have_http_status(:ok)
-      expect(json['valid']).to eq(true)
-      expect(json['user']['id']).to eq(user.id)
-      expect(json['user']['inheritance_code']).to eq(user.inheritance_code)
-      expect(json['user']['role']).to eq('guest')
-
-      ip_address = IpAddress.find_by(ip_address: IPAddr.new(remote_ip).hton)
-      expect(ip_address).to be_present
-      expect(UserIp.exists?(user:, ip_address:)).to eq(true)
-    end
-
-    it 'is idempotent for same user and same IP address' do
-      user = create(:user, inheritance_code: SecureRandom.uuid, role: 'guest')
-
-      post '/users/verify', params: { code: user.inheritance_code }
-      expect(response).to have_http_status(:ok)
-
-      expect {
-        post '/users/verify', params: { code: user.inheritance_code }
-      }.not_to change(UserIp, :count)
-
-      expect(response).to have_http_status(:ok)
-      expect(json['valid']).to eq(true)
-    end
-
-    it 'creates another UserIp for same user and different IP address' do
-      user = create(:user, inheritance_code: SecureRandom.uuid, role: 'guest')
-
-      post '/users/verify', params: { code: user.inheritance_code }
-      expect(response).to have_http_status(:ok)
-
-      allow_any_instance_of(ActionDispatch::Request)
-        .to receive(:remote_ip)
-        .and_return('203.0.113.11')
-
-      expect {
-        post '/users/verify', params: { code: user.inheritance_code }
+        post "/users/verify", params: { code: user.inheritance_code }
       }.to change(UserIp, :count).by(1)
 
       expect(response).to have_http_status(:ok)
-      expect(json['valid']).to eq(true)
+      expect(json["valid"]).to eq(true)
+      expect(json["user"]["id"]).to eq(user.id)
+      expect(json["user"]["inheritance_code"]).to eq(user.inheritance_code)
+      expect(json["user"]["role"]).to eq("guest")
+
+      # ついでに IpAddress もできてることを確認（ipの保存形式がバイナリでも count で見れる）
+      expect(IpAddress.count).to be >= 1
+    end
+
+    it "is idempotent for same user+ip (does not create duplicate UserIp)" do
+      user = create(:user, inheritance_code: SecureRandom.uuid, role: "guest")
+      allow_any_instance_of(ActionDispatch::Request).to receive(:remote_ip).and_return("203.0.113.10")
+
+      post "/users/verify", params: { code: user.inheritance_code }
+      expect(response).to have_http_status(:ok)
+
+      expect {
+        post "/users/verify", params: { code: user.inheritance_code }
+      }.not_to change(UserIp, :count)
+
+      expect(response).to have_http_status(:ok)
+      expect(json["valid"]).to eq(true)
     end
   end
 
-  describe 'GET /users/me' do
-    it 'returns 404 when code not found' do
-      get '/users/me', params: { code: 'nope' }
-
+  describe "GET /users/me" do
+    it "returns 404 when code not found" do
+      get "/users/me", params: { code: "nope" }
       expect(response).to have_http_status(:not_found)
     end
 
-    it 'returns user slice when found' do
-      user = create(:user, inheritance_code: SecureRandom.uuid, name: 'me', role: 'guest')
-
-      get '/users/me', params: { code: user.inheritance_code }
+    it "returns user slice when found" do
+      user = create(:user, inheritance_code: SecureRandom.uuid, name: "me", role: "guest")
+      get "/users/me", params: { code: user.inheritance_code }
 
       expect(response).to have_http_status(:ok)
-      expect(json['id']).to eq(user.id)
-      expect(json['name']).to eq('me')
-      expect(json['inheritance_code']).to eq(user.inheritance_code)
-      expect(json['role']).to eq('guest')
-    end
-
-    it 'returns 403 when current IP address is banned' do
-      user = create(:user, inheritance_code: SecureRandom.uuid)
-
-      IpAddress.create!(
-        ip_address: IPAddr.new(remote_ip).hton,
-        banned_at: Time.current
-      )
-
-      get '/users/me', params: { code: user.inheritance_code }
-
-      expect(response).to have_http_status(:forbidden)
+      expect(json["id"]).to eq(user.id)
+      expect(json["name"]).to eq("me")
+      expect(json["inheritance_code"]).to eq(user.inheritance_code)
+      expect(json["role"]).to eq("guest")
     end
   end
 end

backend/spec/requests/wiki_body_search_pending_spec.rb

@@ -4,7 +4,7 @@ RSpec.describe 'Wiki body search', type: :request do
   let!(:user) { create_member_user! }
 
   it 'searches wiki pages by body text' do
-    pending '#336 で対応予定'
+    pending 'Wiki 本文検索実装時に有効化する'
 
     Wiki::Commit.create_content!(
         tag_name: TagName.create!(name: 'wiki_body_search_hit'),

backend/spec/requests/wiki_restore_pending_spec.rb

@@ -8,7 +8,7 @@ RSpec.describe 'Wiki restore', type: :request do
   end
 
   it 'restores wiki page to previous version' do
-    pending '#337 で対応予定'
+    pending 'Wiki 版巻き戻し API 実装時に有効化する'
 
     page =
         Wiki::Commit.create_content!(

backend/spec/services/version_recorder_spec.rb

@@ -1,85 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe VersionRecorder do
-  let(:member) { create(:user, :member) }
-
-  let(:post_record) do
-    Post.create!(
-        title: 'version recorder post',
-        url: 'https://example.com/version-recorder-post')
-  end
-
-  it 'updates record version_no when creating the first version' do
-    version =
-        PostVersionRecorder.record!(
-            post: post_record,
-            event_type: :create,
-            created_by_user: member)
-
-    expect(version.version_no).to eq(1)
-    expect(post_record.reload.version_no).to eq(1)
-  end
-
-  it 'updates record version_no when creating the next version' do
-    PostVersionRecorder.record!(
-        post: post_record,
-        event_type: :create,
-        created_by_user: member)
-
-    post_record.update!(title: 'updated version recorder post')
-
-    version =
-        PostVersionRecorder.record!(
-            post: post_record.reload,
-            event_type: :update,
-            created_by_user: member)
-
-    expect(version.version_no).to eq(2)
-    expect(post_record.reload.version_no).to eq(2)
-  end
-
-  it 'does not create a new version or advance version_no when snapshot is unchanged' do
-    first =
-        PostVersionRecorder.record!(
-            post: post_record,
-            event_type: :create,
-            created_by_user: member)
-
-    expect {
-      version =
-          PostVersionRecorder.record!(
-              post: post_record.reload,
-              event_type: :update,
-              created_by_user: member)
-
-      expect(version).to eq(first)
-    }.not_to change(PostVersion, :count)
-
-    expect(post_record.reload.version_no).to eq(1)
-  end
-
-  it 'raises when record version_no is older than the latest version' do
-    PostVersionRecorder.record!(
-        post: post_record,
-        event_type: :create,
-        created_by_user: member)
-
-    post_record.update!(title: 'updated once')
-
-    PostVersionRecorder.record!(
-        post: post_record.reload,
-        event_type: :update,
-        created_by_user: member)
-
-    post_record.update_columns(version_no: 1)
-
-    post_record.update!(title: 'updated with stale version_no')
-
-    expect {
-      PostVersionRecorder.record!(
-          post: post_record.reload,
-          event_type: :update,
-          created_by_user: member)
-    }.to raise_error(RuntimeError, /version_no/)
-  end
-end

backend/spec/services/youtube/api_client_spec.rb

@@ -1,130 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe Youtube::ApiClient do
-  let(:api_key) { 'test-api-key' }
-  let(:client) { described_class.new(api_key:) }
-
-  describe '#search_videos' do
-    it 'calls YouTube search API with expected params' do
-      published_after = Time.zone.parse('2026-05-01 00:00:00')
-      published_before = Time.zone.parse('2026-05-02 00:00:00')
-
-      expect(client).to receive(:get_json).with(
-        '/search',
-        {
-          part: 'snippet',
-          type: 'video',
-          q: 'ぼざろクリーチャー',
-          order: 'date',
-          maxResults: 50,
-          regionCode: 'JP',
-          relevanceLanguage: 'ja',
-          publishedAfter: published_after.iso8601,
-          publishedBefore: published_before.iso8601,
-          pageToken: 'NEXT'
-        }
-      ).and_return({ 'items' => [] })
-
-      client.search_videos(
-        q: 'ぼざろクリーチャー',
-        published_after:,
-        published_before:,
-        page_token: 'NEXT'
-      )
-    end
-
-    it 'omits nil optional params' do
-      expect(client).to receive(:get_json).with(
-        '/search',
-        hash_excluding(:publishedAfter, :publishedBefore, :pageToken)
-      ).and_return({ 'items' => [] })
-
-      client.search_videos(q: 'ぼざろクリーチャー')
-    end
-  end
-
-  describe '#videos' do
-    it 'returns empty items when ids are empty' do
-      expect(client).not_to receive(:get_json)
-
-      expect(client.videos([])).to eq({ 'items' => [] })
-    end
-
-    it 'calls videos API with comma separated ids' do
-      expect(client).to receive(:get_json).with(
-        '/videos',
-        {
-          part: 'snippet,status,contentDetails',
-          id: 'video-1,video-2'
-        }
-      ).and_return({ 'items' => [] })
-
-      client.videos(['video-1', 'video-2'])
-    end
-  end
-
-  describe '#playlist_items' do
-    it 'calls playlistItems API with page token' do
-      expect(client).to receive(:get_json).with(
-        '/playlistItems',
-        {
-          part: 'snippet,contentDetails,status',
-          playlistId: 'PL123',
-          maxResults: 50,
-          pageToken: 'NEXT'
-        }
-      ).and_return({ 'items' => [] })
-
-      client.playlist_items(playlist_id: 'PL123', page_token: 'NEXT')
-    end
-
-    it 'omits page token when nil' do
-      expect(client).to receive(:get_json).with(
-        '/playlistItems',
-        {
-          part: 'snippet,contentDetails,status',
-          playlistId: 'PL123',
-          maxResults: 50
-        }
-      ).and_return({ 'items' => [] })
-
-      client.playlist_items(playlist_id: 'PL123')
-    end
-  end
-
-  describe '#channel' do
-    it 'calls channels API by id' do
-      expect(client).to receive(:get_json).with(
-        '/channels',
-        {
-          part: 'snippet,contentDetails',
-          id: 'UC123'
-        }
-      ).and_return({ 'items' => [] })
-
-      client.channel(id: 'UC123')
-    end
-
-    it 'calls channels API by handle' do
-      expect(client).to receive(:get_json).with(
-        '/channels',
-        {
-          part: 'snippet,contentDetails',
-          forHandle: '@some_handle'
-        }
-      ).and_return({ 'items' => [] })
-
-      client.channel(handle: '@some_handle')
-    end
-
-    it 'raises when neither id nor handle is given' do
-      expect { client.channel }.to raise_error(ArgumentError, 'id or handle is required')
-    end
-
-    it 'raises when both id and handle are given' do
-      expect do
-        client.channel(id: 'UC123', handle: '@some_handle')
-      end.to raise_error(ArgumentError, 'id or handle is required')
-    end
-  end
-end

backend/spec/services/youtube/sync_spec.rb

@@ -1,310 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe Youtube::Sync do
-  let(:client) { instance_double(Youtube::ApiClient) }
-  let(:sync) { described_class.new(client:) }
-
-  before do
-    allow(PostVersionRecorder).to receive(:record!)
-    allow(PostVersionRecorder).to receive(:ensure_snapshot!)
-    allow(sync).to receive(:attach_thumbnail_if_needed!)
-  end
-
-  describe '#sync!' do
-    it 'returns without fetching video details when no video ids are discovered' do
-      allow(sync).to receive(:query_terms).and_return([])
-      allow(sync).to receive(:playlist_ids).and_return([])
-
-      expect(client).not_to receive(:videos)
-
-      sync.sync!
-    end
-
-    it 'discovers ids from search and all playlist pages' do
-      allow(sync).to receive(:query_terms).and_return(['ぼざろクリーチャー'])
-      allow(sync).to receive(:playlist_ids).and_return(['PL123'])
-      allow(sync).to receive(:sync_since).and_return(Time.zone.parse('2026-05-01 00:00:00'))
-
-      allow(client).to receive(:search_videos).with(
-        q: 'ぼざろクリーチャー',
-        published_after: Time.zone.parse('2026-05-01 00:00:00')
-      ).and_return({
-        'items' => [
-          {
-            'id' => {
-              'videoId' => 'search-video-1'
-            }
-          }
-        ]
-      })
-
-      allow(client).to receive(:playlist_items).with(
-        playlist_id: 'PL123',
-        page_token: nil
-      ).and_return({
-        'items' => [
-          {
-            'contentDetails' => {
-              'videoId' => 'playlist-video-1'
-            }
-          }
-        ],
-        'nextPageToken' => 'NEXT'
-      })
-
-      allow(client).to receive(:playlist_items).with(
-        playlist_id: 'PL123',
-        page_token: 'NEXT'
-      ).and_return({
-        'items' => [
-          {
-            'snippet' => {
-              'resourceId' => {
-                'videoId' => 'playlist-video-2'
-              }
-            }
-          }
-        ]
-      })
-
-      expect(client).to receive(:videos).with(
-        satisfy do |ids|
-          ids.sort == ['playlist-video-1', 'playlist-video-2', 'search-video-1']
-        end
-      ).and_return({ 'items' => [] })
-
-      sync.sync!
-    end
-
-    it 'creates a YouTube post with default tags and no_deerjikist when no deerjikist mapping exists' do
-      Tag.tagme
-      Tag.bot
-      Tag.youtube
-      Tag.video
-      Tag.no_deerjikist
-
-      allow(sync).to receive(:query_terms).and_return([])
-      allow(sync).to receive(:playlist_ids).and_return(['PL123'])
-
-      allow(client).to receive(:playlist_items).with(
-        playlist_id: 'PL123',
-        page_token: nil
-      ).and_return({
-        'items' => [
-          {
-            'contentDetails' => {
-              'videoId' => 'video-1'
-            }
-          }
-        ]
-      })
-
-      allow(client).to receive(:videos).with(['video-1']).and_return({
-        'items' => [
-          youtube_video_item(
-            id: 'video-1',
-            title: 'YouTube テスト動画',
-            channel_id: 'UC_NO_MAPPING'
-          )
-        ]
-      })
-
-      expect do
-        sync.sync!
-      end.to change(Post, :count).by(1)
-
-      post = Post.find_by!(url: 'https://www.youtube.com/watch?v=video-1')
-      tag_ids = post.tags.pluck(:id)
-
-      expect(post.title).to eq('YouTube テスト動画')
-      expect(post.uploaded_user_id).to be_nil
-      expect(post.original_created_from).to eq(Time.zone.parse('2026-05-01 12:34:00'))
-      expect(post.original_created_before).to eq(Time.zone.parse('2026-05-01 12:35:00'))
-
-      expect(tag_ids).to include(Tag.tagme.id)
-      expect(tag_ids).to include(Tag.bot.id)
-      expect(tag_ids).to include(Tag.youtube.id)
-      expect(tag_ids).to include(Tag.video.id)
-      expect(tag_ids).to include(Tag.no_deerjikist.id)
-
-      expect(PostVersionRecorder).to have_received(:record!).with(
-        post:,
-        event_type: :create,
-        created_by_user: nil
-      )
-    end
-
-    it 'uses deerjikist tag when channel id is mapped' do
-      Tag.tagme
-      Tag.bot
-      Tag.youtube
-      Tag.video
-      Tag.no_deerjikist
-
-      deerjikist_tag = Tag.find_or_create_by_tag_name!('テスト投稿者', category: :deerjikist)
-      Deerjikist.create!(
-        platform: 'youtube',
-        code: 'UC_MAPPED',
-        tag: deerjikist_tag
-      )
-
-      allow(sync).to receive(:query_terms).and_return([])
-      allow(sync).to receive(:playlist_ids).and_return(['PL123'])
-
-      allow(client).to receive(:playlist_items).with(
-        playlist_id: 'PL123',
-        page_token: nil
-      ).and_return({
-        'items' => [
-          {
-            'contentDetails' => {
-              'videoId' => 'video-1'
-            }
-          }
-        ]
-      })
-
-      allow(client).to receive(:videos).with(['video-1']).and_return({
-        'items' => [
-          youtube_video_item(
-            id: 'video-1',
-            title: 'YouTube テスト動画',
-            channel_id: 'UC_MAPPED'
-          )
-        ]
-      })
-
-      sync.sync!
-
-      post = Post.find_by!(url: 'https://www.youtube.com/watch?v=video-1')
-      tag_ids = post.tags.pluck(:id)
-
-      expect(tag_ids).to include(deerjikist_tag.id)
-      expect(tag_ids).not_to include(Tag.no_deerjikist.id)
-    end
-
-    it 'removes no_deerjikist when deerjikist mapping is added later' do
-      Tag.no_deerjikist
-
-      post = Post.create!(
-        title: '旧タイトル',
-        url: 'https://www.youtube.com/watch?v=video-1',
-        uploaded_user_id: nil,
-        original_created_from: Time.zone.parse('2026-05-01 00:00:00'),
-        original_created_before: Time.zone.parse('2026-05-01 00:01:00')
-      )
-      PostTag.create!(post:, tag: Tag.no_deerjikist)
-
-      deerjikist_tag = Tag.find_or_create_by_tag_name!('後から判明した投稿者', category: :deerjikist)
-      Deerjikist.create!(
-        platform: 'youtube',
-        code: 'UC_MAPPED_LATER',
-        tag: deerjikist_tag
-      )
-
-      allow(sync).to receive(:query_terms).and_return([])
-      allow(sync).to receive(:playlist_ids).and_return(['PL123'])
-
-      allow(client).to receive(:playlist_items).with(
-        playlist_id: 'PL123',
-        page_token: nil
-      ).and_return({
-        'items' => [
-          {
-            'contentDetails' => {
-              'videoId' => 'video-1'
-            }
-          }
-        ]
-      })
-
-      allow(client).to receive(:videos).with(['video-1']).and_return({
-        'items' => [
-          youtube_video_item(
-            id: 'video-1',
-            title: '新タイトル',
-            channel_id: 'UC_MAPPED_LATER'
-          )
-        ]
-      })
-
-      sync.sync!
-
-      post.reload
-      tag_ids = post.tags.pluck(:id)
-
-      expect(post.title).to eq('新タイトル')
-      expect(tag_ids).to include(deerjikist_tag.id)
-      expect(tag_ids).not_to include(Tag.no_deerjikist.id)
-
-      expect(PostVersionRecorder).to have_received(:ensure_snapshot!).with(
-        post,
-        created_by_user: nil
-      )
-      expect(PostVersionRecorder).to have_received(:record!).with(
-        post:,
-        event_type: :update,
-        created_by_user: nil
-      )
-    end
-
-    it 'matches existing youtu.be URL and does not create duplicate post' do
-      post = Post.create!(
-        title: '旧タイトル',
-        url: 'https://youtu.be/video-1',
-        uploaded_user_id: nil,
-        original_created_from: Time.zone.parse('2026-05-01 00:00:00'),
-        original_created_before: Time.zone.parse('2026-05-01 00:01:00')
-      )
-
-      allow(sync).to receive(:query_terms).and_return([])
-      allow(sync).to receive(:playlist_ids).and_return(['PL123'])
-
-      allow(client).to receive(:playlist_items).with(
-        playlist_id: 'PL123',
-        page_token: nil
-      ).and_return({
-        'items' => [
-          {
-            'contentDetails' => {
-              'videoId' => 'video-1'
-            }
-          }
-        ]
-      })
-
-      allow(client).to receive(:videos).with(['video-1']).and_return({
-        'items' => [
-          youtube_video_item(
-            id: 'video-1',
-            title: '新タイトル',
-            channel_id: 'UC_NO_MAPPING'
-          )
-        ]
-      })
-
-      expect do
-        sync.sync!
-      end.not_to change(Post, :count)
-
-      expect(post.reload.title).to eq('新タイトル')
-    end
-  end
-
-  def youtube_video_item(id:, title:, channel_id:)
-    {
-      'id' => id,
-      'snippet' => {
-        'title' => title,
-        'channelId' => channel_id,
-        'publishedAt' => '2026-05-01T12:34:56Z',
-        'thumbnails' => {
-          'high' => {
-            'url' => "https://img.youtube.com/#{id}.jpg"
-          }
-        },
-        'tags' => ['tag-a', 'tag-b']
-      }
-    }
-  end
-end

backend/spec/services/youtube/video_item_spec.rb

@@ -1,93 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe Youtube::VideoItem do
-  describe '#initialize' do
-    it 'extracts fields from YouTube video API item' do
-      item = {
-        'id' => 'video-1',
-        'snippet' => {
-          'title' => 'テスト動画',
-          'channelId' => 'UC123',
-          'publishedAt' => '2026-05-01T12:34:56Z',
-          'tags' => ['tag-a', 'tag-b'],
-          'thumbnails' => {
-            'high' => {
-              'url' => 'https://img.youtube.com/high.jpg'
-            },
-            'medium' => {
-              'url' => 'https://img.youtube.com/medium.jpg'
-            }
-          }
-        }
-      }
-
-      video = described_class.new(item)
-
-      expect(video.id).to eq('video-1')
-      expect(video.title).to eq('テスト動画')
-      expect(video.channel_id).to eq('UC123')
-      expect(video.published_at).to eq(Time.iso8601('2026-05-01T12:34:56Z'))
-      expect(video.thumbnail_url).to eq('https://img.youtube.com/high.jpg')
-      expect(video.raw_tags).to eq(['tag-a', 'tag-b'])
-      expect(video.url).to eq('https://www.youtube.com/watch?v=video-1')
-    end
-
-    it 'uses highest priority thumbnail' do
-      item = {
-        'id' => 'video-1',
-        'snippet' => {
-          'title' => 'テスト動画',
-          'channelId' => 'UC123',
-          'publishedAt' => '2026-05-01T12:34:56Z',
-          'thumbnails' => {
-            'default' => {
-              'url' => 'https://img.youtube.com/default.jpg'
-            },
-            'standard' => {
-              'url' => 'https://img.youtube.com/standard.jpg'
-            },
-            'maxres' => {
-              'url' => 'https://img.youtube.com/maxres.jpg'
-            }
-          }
-        }
-      }
-
-      video = described_class.new(item)
-
-      expect(video.thumbnail_url).to eq('https://img.youtube.com/maxres.jpg')
-    end
-
-    it 'falls back to empty raw tags' do
-      item = {
-        'id' => 'video-1',
-        'snippet' => {
-          'title' => 'テスト動画',
-          'channelId' => 'UC123',
-          'publishedAt' => '2026-05-01T12:34:56Z',
-          'thumbnails' => {}
-        }
-      }
-
-      video = described_class.new(item)
-
-      expect(video.raw_tags).to eq([])
-    end
-
-    it 'returns nil thumbnail when no thumbnail exists' do
-      item = {
-        'id' => 'video-1',
-        'snippet' => {
-          'title' => 'テスト動画',
-          'channelId' => 'UC123',
-          'publishedAt' => '2026-05-01T12:34:56Z',
-          'thumbnails' => {}
-        }
-      }
-
-      video = described_class.new(item)
-
-      expect(video.thumbnail_url).to be_nil
-    end
-  end
-end

backend/spec/support/test_records.rb

@@ -2,12 +2,14 @@ module TestRecords
   def create_member_user!
     User.create!(name: 'spec user',
                  inheritance_code: SecureRandom.hex(16),
-                 role: 'member')
+                 role: 'member',
+                 banned: false)
   end
 
   def create_admin_user!
     User.create!(name: 'spec admin',
                  inheritance_code: SecureRandom.hex(16),
-                 role: 'admin')
+                 role: 'admin',
+                 banned: false)
   end
 end

backend/spec/tasks/nico_sync_spec.rb

@@ -104,7 +104,7 @@ RSpec.describe "nico:sync" do
       url: post.url,
       thumbnail_base: post.thumbnail_base,
       tags: snapshot_tags(post),
-      parent_post_ids: post.snapshot_parent_post_ids.join(' '),
+      parent: post.parent,
       original_created_from: post.original_created_from,
       original_created_before: post.original_created_before,
       created_at: Time.current,

backend/spec/tasks/post_sync_spec.rb

@@ -1,25 +0,0 @@
-require 'rails_helper'
-require 'rake'
-
-RSpec.describe 'post:sync' do
-  around do |example|
-    original_application = Rake.application
-    Rake.application = Rake::Application.new
-
-    Rake::Task.define_task(:environment)
-    load Rails.root.join('lib/tasks/sync_posts.rake')
-
-    example.run
-  ensure
-    Rake.application = original_application
-  end
-
-  it 'runs Youtube::Sync' do
-    sync = instance_double(Youtube::Sync)
-
-    expect(Youtube::Sync).to receive(:new).once.and_return(sync)
-    expect(sync).to receive(:sync!).once
-
-    Rake::Task['post:sync'].invoke
-  end
-end

frontend/src/App.tsx

@@ -8,10 +8,8 @@ import { BrowserRouter,
 
 import RouteBlockerOverlay from '@/components/RouteBlockerOverlay'
 import TopNav from '@/components/TopNav'
-import DialogueProvider from '@/components/dialogues/DialogueProvider'
 import { Toaster } from '@/components/ui/toaster'
 import { apiPost, isApiError } from '@/lib/api'
-import DeerjikistDetailPage from '@/pages/deerjikists/DeerjikistDetailPage'
 import MaterialBasePage from '@/pages/materials/MaterialBasePage'
 import MaterialDetailPage from '@/pages/materials/MaterialDetailPage'
 import MaterialListPage from '@/pages/materials/MaterialListPage'
@@ -60,7 +58,6 @@ const RouteTransitionWrapper = ({ user, setUser }: {
 	  <Route path="/posts/changes" element={<PostHistoryPage/>}/>
 	  <Route path="/tags" element={<TagListPage/>}/>
 	  <Route path="/tags/:id" element={<TagDetailPage/>}/>
-	  <Route path="/tags/:id/deerjikists" element={<DeerjikistDetailPage/>}/>
 	  <Route path="/tags/nico" element={<NicoTagListPage user={user}/>}/>
 	  <Route path="/tags/changes" element={<TagHistoryPage/>}/>
 	  <Route path="/theatres/:id" element={<TheatreDetailPage/>}/>
@@ -139,21 +136,17 @@ export default (() => {
   return (
       <>
 	<RouteBlockerOverlay/>
-
 	<BrowserRouter>
-	  <DialogueProvider>
-	    <LayoutGroup>
-	      <motion.div
-		  layout="position"
-		  transition={{ layout: { duration: .2, ease: 'easeOut' } }}
-		  className="flex flex-col h-dvh w-full overflow-y-hidden">
-		<TopNav user={user}/>
-		<RouteTransitionWrapper user={user} setUser={setUser}/>
-	      </motion.div>
-	    </LayoutGroup>
-
-	    <Toaster/>
-	  </DialogueProvider>
+	  <LayoutGroup>
+	    <motion.div
+		layout="position"
+		transition={{ layout: { duration: .2, ease: 'easeOut' } }}
+		className="flex flex-col h-dvh w-full overflow-y-hidden">
+	      <TopNav user={user}/>
+	      <RouteTransitionWrapper user={user} setUser={setUser}/>
+	    </motion.div>
+	  </LayoutGroup>
+	  <Toaster/>
 	</BrowserRouter>
       </>)
 }) satisfies FC

frontend/src/components/PostEditForm.tsx

@@ -3,12 +3,10 @@ import { useEffect, useState } from 'react'
 import PostFormTagsArea from '@/components/PostFormTagsArea'
 import PostOriginalCreatedTimeField from '@/components/PostOriginalCreatedTimeField'
 import Label from '@/components/common/Label'
-import { useDialogue } from '@/components/dialogues/DialogueProvider'
 import { Button } from '@/components/ui/button'
-import { toast } from '@/components/ui/use-toast'
-import { updatePost } from '@/lib/posts'
+import { apiPut } from '@/lib/api'
 
-import type { FC, FormEvent } from 'react'
+import type { FC } from 'react'
 
 import type { Post, Tag } from '@/types'
 
@@ -33,86 +31,24 @@ type Props = { post:    Post
 
 
 export default (({ post, onSave }: Props) => {
-  const [disabled, setDisabled] = useState (false)
   const [originalCreatedBefore, setOriginalCreatedBefore] =
       useState<string | null> (post.originalCreatedBefore)
   const [originalCreatedFrom, setOriginalCreatedFrom] =
       useState<string | null> (post.originalCreatedFrom)
-  const [parentPostIds, setParentPostIds] =
-      useState ((post.parentPosts ?? []).map (p => p.id).join (' '))
-  const [tags, setTags] = useState<string> ('')
   const [title, setTitle] = useState (post.title)
+  const [tags, setTags] = useState<string> ('')
 
-  const dialogue = useDialogue ()
-
-  const update = async (...args: Parameters<typeof updatePost>) => {
-    try
-    {
-      const data = await updatePost (...args)
-      onSave ({ ...post,
-		versionNo:              data.versionNo,
-		title:                  data.title,
-		tags:                   data.tags,
-		parentPosts:            data.parentPosts,
-		childPosts:             data.childPosts,
-		siblingPosts:           data.siblingPosts,
-		originalCreatedFrom:    data.originalCreatedFrom,
-		originalCreatedBefore:  data.originalCreatedBefore } as Post)
-      toast ({ description: '更新しました．' })
-    }
-    catch (e)
-    {
-      const response = (e as any)?.response
-
-      if (response?.status !== 409)
-	{
-	  toast ({ description: '更新はできなかったよ……' })
-	  return
-	}
-
-      const action = await dialogue.choice ({
-	  title: '競合が発生しました．',
-	  description: (
-	      <div>
-		<p>ほかの耕作員が先に更新してゐます．</p>
-		<p>現在の変更をどう扱ひますか?</p>
-	      </div>),
-	  choices: [...(response?.data?.mergeable ? [{ value: 'merge', label: '差分をマージ' }] : []),
-		    { value: 'overwrite', label: '強制上書き', variant: 'danger' }] })
-
-      if (action === 'merge')
-	{
-	  // TODO: 差分 UI
-	  await update ({ id: post.id, title, tags, parentPostIds,
-			  originalCreatedFrom, originalCreatedBefore },
-			{ baseVersionNo: post.versionNo, merge: true })
-	  return
-	}
-
-      if (action === 'overwrite')
-	{
-	  await update ({ id: post.id, title, tags, parentPostIds,
-			  originalCreatedFrom, originalCreatedBefore },
-			{ baseVersionNo: post.versionNo, force: true })
-	  return
-	}
-    }
-  }
-
-  const handleSubmit = async (e: FormEvent) => {
-    e.preventDefault ()
-
-    setDisabled (true)
-    try
-    {
-      await update ({ id: post.id, title, tags, parentPostIds,
-		      originalCreatedFrom, originalCreatedBefore },
-		    { baseVersionNo: post.versionNo })
-    }
-    finally
-    {
-      setDisabled (false)
-    }
+  const handleSubmit = async () => {
+    const data = await apiPut<Post> (
+	`/posts/${ post.id }`,
+	{ title, tags, original_created_from: originalCreatedFrom,
+	  original_created_before: originalCreatedBefore },
+	{ headers: { 'Content-Type': 'multipart/form-data' } })
+    onSave ({ ...post,
+	      title:                  data.title,
+	      tags:                   data.tags,
+	      originalCreatedFrom:    data.originalCreatedFrom,
+	      originalCreatedBefore:  data.originalCreatedBefore } as Post)
   }
 
   useEffect (() => {
@@ -120,48 +56,30 @@ export default (({ post, onSave }: Props) => {
   }, [post])
 
   return (
-      <form onSubmit={handleSubmit} className="max-w-xl pt-2 space-y-4">
+      <div className="max-w-xl pt-2 space-y-4">
 	{/* タイトル */}
 	<div>
 	  <Label>タイトル</Label>
-	  <input
-	      type="text"
-	      disabled={disabled}
-	      className="w-full border rounded p-2"
-	      value={title ?? ''}
-	      onChange={ev => setTitle (ev.target.value)}/>
-	</div>
-
-	{/* 親投稿 */}
-	<div>
-	  <Label>親投稿</Label>
-	  <input
-	      type="text"
-	      disabled={disabled}
-	      value={parentPostIds}
-	      onChange={e => setParentPostIds (e.target.value)}
-	      className="w-full border p-2 rounded"/>
+	  <input type="text"
+		 className="w-full border rounded p-2"
+		 value={title ?? ''}
+		 onChange={ev => setTitle (ev.target.value)}/>
 	</div>
 
 	{/* タグ */}
-	<PostFormTagsArea
-	    disabled={disabled}
-	    tags={tags}
-	    setTags={setTags}/>
+	<PostFormTagsArea tags={tags} setTags={setTags}/>
 
 	{/* オリジナルの作成日時 */}
 	<PostOriginalCreatedTimeField
-	    disabled={disabled}
 	    originalCreatedFrom={originalCreatedFrom}
 	    setOriginalCreatedFrom={setOriginalCreatedFrom}
 	    originalCreatedBefore={originalCreatedBefore}
 	    setOriginalCreatedBefore={setOriginalCreatedBefore}/>
 
 	{/* 送信 */}
-	<Button
-	    type="submit"
-	    disabled={disabled}>
+	<Button onClick={handleSubmit}
+		className="px-4 py-2 bg-blue-600 text-white rounded disabled:bg-gray-400">
 	  更新
 	</Button>
-      </form>)
+      </div>)
 }) satisfies FC<Props>

frontend/src/components/PostEmbed.tsx

@@ -3,7 +3,6 @@ import YoutubeEmbed from 'react-youtube'
 
 import NicoViewer from '@/components/NicoViewer'
 import TwitterEmbed from '@/components/TwitterEmbed'
-import { useDialogue } from '@/components/dialogues/DialogueProvider'
 
 import type { FC, RefObject } from 'react'
 
@@ -17,8 +16,6 @@ type Props = {
 
 
 export default (({ ref, post, onLoadComplete, onMetadataChange }: Props) => {
-  const dialogue = useDialogue ()
-
   const url = new URL (post.url)
 
   switch (url.hostname.split ('.').slice (-2).join ('.'))
@@ -85,17 +82,12 @@ export default (({ ref, post, onLoadComplete, onMetadataChange }: Props) => {
 		height={360}/>)
 	 : (
 	    <div>
-	      <a href="#" onClick={async e => {
+	      <a href="#" onClick={e => {
 		e.preventDefault ()
-
-		setFramed (await dialogue.confirm ({
-		    title: '未確認の外部ページを表示します。',
-		    description: (
-			<div>
-			  <p>悪意のあるスクリプトが実行される可能性があります。</p>
-			  <p>表示しますか?</p>
-			</div>),
-		    confirmText: '表示' }))
+		setFramed (confirm ('未確認の外部ページを表示します。\n'
+				    + '悪意のあるスクリプトが実行される可能性があります。\n'
+				    + '表示しますか?'))
+		return
 	      }}>
 		外部ページを表示
 	      </a>

frontend/src/components/PostFormTagsArea.tsx

@@ -7,7 +7,7 @@ import Label from '@/components/common/Label'
 import TextArea from '@/components/common/TextArea'
 import { apiGet } from '@/lib/api'
 
-import type { ComponentPropsWithoutRef, FC, SyntheticEvent } from 'react'
+import type { FC, SyntheticEvent } from 'react'
 
 import type { Tag } from '@/types'
 
@@ -31,12 +31,12 @@ const replaceToken = (value: string, start: number, end: number, text: string) =
     `${ value.slice (0, start) }${ text }${ value.slice (end) }`
 
 
-type Props = Omit<ComponentPropsWithoutRef<'textarea'>, 'value' | 'onChange' | 'onBlur'> & {
+type Props = {
     tags:     string
     setTags:  (tags: string) => void }
 
 
-export default (({ tags, setTags, ...rest }: Props) => {
+export default (({ tags, setTags }: Props) => {
   const ref = useRef<HTMLTextAreaElement> (null)
 
   const [bounds, setBounds] = useState<{ start: number; end: number }> ({ start: 0, end: 0 })
@@ -76,7 +76,6 @@ export default (({ tags, setTags, ...rest }: Props) => {
       <div className="relative w-full">
 	<Label>タグ</Label>
 	<TextArea
-	    {...rest}
 	    ref={ref}
 	    value={tags}
 	    onChange={ev => setTags (ev.target.value)}

frontend/src/components/PostList.tsx

@@ -3,7 +3,6 @@ import { useRef } from 'react'
 import { useLocation } from 'react-router-dom'
 
 import PrefetchLink from '@/components/PrefetchLink'
-import { cn } from '@/lib/utils'
 import { useSharedTransitionStore } from '@/stores/sharedTransitionStore'
 
 import type { FC, MouseEvent } from 'react'
@@ -40,10 +39,8 @@ export default (({ posts, onClick }: Props) => {
 		<motion.div
 		    ref={cardRef}
 		    layoutId={layoutId}
-		    className={cn ('w-full h-full overflow-hidden rounded-xl shadow',
-				   'transform-gpu will-change-transform',
-				   (post.childPosts ?? []).length > 0 && 'ring-4 ring-green-500',
-				   (post.parentPosts ?? []).length > 0 && 'ring-4 ring-yellow-500')}
+		    className="w-full h-full overflow-hidden rounded-xl shadow
+			       transform-gpu will-change-transform"
 		    whileHover={{ scale: 1.02 }}
 		    onLayoutAnimationStart={() => {
 		      if (!(cardRef.current))

frontend/src/components/PostOriginalCreatedTimeField.tsx

@@ -5,15 +5,13 @@ import { Button } from '@/components/ui/button'
 import type { FC } from 'react'
 
 type Props = {
-    disabled?:                boolean
     originalCreatedFrom:      string | null
     setOriginalCreatedFrom:   (x: string | null) => void
     originalCreatedBefore:    string | null
     setOriginalCreatedBefore: (x: string | null) => void }
 
 
-export default (({ disabled,
-		   originalCreatedFrom,
+export default (({ originalCreatedFrom,
 		   setOriginalCreatedFrom,
 		   originalCreatedBefore,
 		   setOriginalCreatedBefore }: Props) => (
@@ -23,7 +21,6 @@ export default (({ disabled,
 	<div className="w-80">
 	  <DateTimeField
 	      className="mr-2"
-	      disabled={disabled ?? false}
 	      value={originalCreatedFrom ?? undefined}
 	      onChange={setOriginalCreatedFrom}
 	      onBlur={ev => {
@@ -43,7 +40,6 @@ export default (({ disabled,
 	<div>
 	  <Button
 	      className="bg-gray-600 text-white rounded"
-	      disabled={disabled}
 	      onClick={() => {
 		setOriginalCreatedFrom (null)
 	      }}>
@@ -55,7 +51,6 @@ export default (({ disabled,
 	<div className="w-80">
 	  <DateTimeField
 	      className="mr-2"
-	      disabled={disabled}
 	      value={originalCreatedBefore ?? undefined}
 	      onChange={setOriginalCreatedBefore}/>
 	  より前
@@ -63,7 +58,6 @@ export default (({ disabled,
 	<div>
 	  <Button
 	      className="bg-gray-600 text-white rounded"
-	      disabled={disabled}
 	      onClick={() => {
 		setOriginalCreatedBefore (null)
 	      }}>

frontend/src/components/TagLink.tsx

@@ -45,9 +45,9 @@ export default (({ tag,
       <>
 	{(linkFlg && withWiki) && (
 	    <span className="mr-1">
-	      {(tag.materialId != null || tag.hasWiki || tag.hasDeerjikists)
+	      {(tag.materialId != null || tag.hasWiki)
 	       ? (
-		  tag.materialId == null && !(tag.hasDeerjikists)
+		  tag.materialId == null
 		  ? (
 		      <PrefetchLink
 			  to={`/wiki/${ encodeURIComponent (tag.name) }`}
@@ -55,19 +55,11 @@ export default (({ tag,
 			?
 		      </PrefetchLink>)
 		  : (
-		      tag.materialId != null
-		      ? (
-			  <PrefetchLink
-			      to={`/materials/${ tag.materialId }`}
-			      className={linkClass}>
-			    ?
-			  </PrefetchLink>)
-		      : (
-			  <PrefetchLink
-			      to={`/tags/${ tag.id }/deerjikists`}
-			      className={linkClass}>
-			    ?
-			  </PrefetchLink>)))
+		      <PrefetchLink
+			  to={`/materials/${ tag.materialId }`}
+			  className={linkClass}>
+			?
+		      </PrefetchLink>))
 	       : (
 		  ['character', 'material'].includes (tag.category)
 		  ? (
@@ -79,23 +71,13 @@ export default (({ tag,
 			!
 		      </PrefetchLink>)
 		  : (
-		      tag.category === 'deerjikist'
-		      ? (
-			  <PrefetchLink
-			      to={`/tags/${ tag.id }/deerjikists`}
-			      className="animate-[wiki-blink_.25s_steps(2,end)_infinite]
-					 dark:animate-[wiki-blink-dark_.25s_steps(2,end)_infinite]"
-			      title={`${ tag.name } に関する情報が存在しません．`}>
-			    !
-			  </PrefetchLink>)
-		      : (
-			  <PrefetchLink
-			      to={`/wiki/${ encodeURIComponent (tag.name) }`}
-			      className="animate-[wiki-blink_.25s_steps(2,end)_infinite]
-					 dark:animate-[wiki-blink-dark_.25s_steps(2,end)_infinite]"
-			      title={`${ tag.name } Wiki が存在しません．`}>
-			    !
-			  </PrefetchLink>)))}
+		      <PrefetchLink
+			  to={`/wiki/${ encodeURIComponent (tag.name) }`}
+			  className="animate-[wiki-blink_.25s_steps(2,end)_infinite]
+				     dark:animate-[wiki-blink-dark_.25s_steps(2,end)_infinite]"
+			  title={`${ tag.name } Wiki が存在しません．`}>
+			!
+		      </PrefetchLink>))}
 	    </span>)}
 	{nestLevel > 0 && (
 	    <span

frontend/src/components/TopNav.tsx

@@ -36,12 +36,12 @@ export const menuOutline = ({ tag, wikiId, user, pathName }: {
 	  { name: '一覧', to: '/posts' },
 	  { name: '検索', to: '/posts/search' },
 	  { name: '追加', to: '/posts/new' },
-	  { name: '全体履歴', 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: 'マスタ', to: '/tags' },
 	  { name: 'ニコニコ連携', to: '/tags/nico' },
-	  { name: '全体履歴', to: '/tags/changes' },
+	  { name: '履歴', to: '/tags/changes' },
 	  { name: 'ヘルプ', to: '/wiki/ヘルプ:タグ' },
 	  { component: <Separator/>, visible: tagFlg },
 	  { name: `広場 (${ postCount || 0 })`,
@@ -53,7 +53,7 @@ export const menuOutline = ({ tag, wikiId, user, pathName }: {
 	  { name: '一覧', to: '/materials' },
 	  { name: '検索', to: '/materials/search', visible: false }, 
 	  { name: '追加', to: '/materials/new' },
-	  { name: '全体履歴', to: '/materials/changes', visible: false },
+	  { name: '履歴', to: '/materials/changes', visible: false },
 	  { name: 'ヘルプ', to: '/wiki/ヘルプ:素材集' }] },
       { name: '上映会', to: '/theatres/1', base: '/theatres', subMenu: [
 	  { name: <>第&thinsp;1&thinsp;会場</>, to: '/theatres/1' },

frontend/src/components/common/DateTimeField.tsx

@@ -2,7 +2,7 @@ import { useEffect, useState } from 'react'
 
 import { cn } from '@/lib/utils'
 
-import type { ComponentPropsWithoutRef, FC, FocusEvent } from 'react'
+import type { FC, FocusEvent } from 'react'
 
 
 const pad = (n: number): string => n.toString ().padStart (2, '0')
@@ -18,14 +18,14 @@ const toDateTimeLocalValue = (d: Date) => {
 }
 
 
-type Props = Omit<ComponentPropsWithoutRef<'input'>, 'onChange'> & {
+type Props = {
     value?:     string
     onChange?:  (isoUTC: string | null) => void
     className?: string
     onBlur?:    (ev: FocusEvent<HTMLInputElement>) => void }
 
 
-export default (({ value, onChange, className, onBlur, ...rest }: Props) => {
+export default (({ value, onChange, className, onBlur }: Props) => {
   const [local, setLocal] = useState ('')
 
   useEffect (() => {
@@ -34,7 +34,6 @@ export default (({ value, onChange, className, onBlur, ...rest }: Props) => {
 
   return (
       <input
-	  {...rest}
 	  className={cn ('border rounded p-2', className)}
 	  type="datetime-local"
 	  value={local}

frontend/src/components/dialogues/DialogueProvider.tsx

@@ -1,187 +0,0 @@
-import { createContext, useCallback, useContext, useMemo, useState } from 'react'
-
-import { Button } from '@/components/ui/button'
-import { Dialog,
-	 DialogContent,
-	 DialogDescription,
-	 DialogFooter,
-	 DialogHeader,
-	 DialogTitle } from '@/components/ui/dialog'
-
-import type { FC, ReactNode } from 'react'
-
-type DialogueVariant = 'default' | 'danger'
-
-type ConfirmOptions = { title:        string
-			description?: ReactNode
-			confirmText?: string
-			cancelText?:  string
-			variant?:     DialogueVariant }
-
-type AlertOptions = { title:        string
-		      description?: ReactNode
-		      okText?:      string }
-
-type Choice<T extends string> = { value:    T
-				  label:    string
-				  variant?: DialogueVariant }
-
-type ChoiceOptions<T extends string> = { title:         string
-					 description?:  ReactNode
-					 choices:       Choice<T>[]
-					 cancelText?:   string }
-
-type DialogueRequest =
-    | { id:       number
-	kind:     'confirm'
-	options:  ConfirmOptions
-	resolve:  (value: boolean) => void }
-    | { id:       number
-	kind:     'alert'
-	options:  AlertOptions
-	resolve:  () => void }
-    | { id:       number
-	kind:     'choice'
-	options:  ChoiceOptions<string>
-	resolve:  (value: string | null) => void }
-
-type DialogueAPI =
-    { confirm:  (options: ConfirmOptions) => Promise<boolean>
-      alert:    (options: AlertOptions) => Promise<void>
-      choice:   <T extends string> (options: ChoiceOptions<T>) => Promise<T | null> }
-
-const DialogueContext = createContext<DialogueAPI | null> (null)
-
-let nextDialogueId = 1
-
-type Props = { children: ReactNode }
-
-
-export default (({ children }: Props) => {
-  const [queue, setQueue] = useState<DialogueRequest[]> ([])
-
-  const push = useCallback ((request: Omit<DialogueRequest, 'id'>) => {
-    const id = nextDialogueId
-    ++nextDialogueId
-
-    setQueue (q => [...q, { ...request, id } as DialogueRequest])
-  }, [])
-
-  const closeActive = useCallback ((result?: unknown) => {
-    setQueue (q => {
-      const [active, ...rest] = q
-
-      if (!(active))
-	return rest
-
-      switch (active.kind)
-      {
-      case 'confirm':
-	active.resolve (Boolean (result))
-	break
-
-      case 'alert':
-	active.resolve ()
-	break
-
-      case 'choice':
-	active.resolve ((result ?? null) as string | null)
-	break
-      }
-
-      return rest
-    })
-  }, [])
-
-  const api = useMemo<DialogueAPI> (() => ({
-      confirm: options => new Promise<boolean> (resolve => {
-	push ({ kind: 'confirm', options, resolve })
-      }),
-      alert: options => new Promise<void> (resolve => {
-	push ({ kind: 'alert', options, resolve })
-      }),
-      choice: options => new Promise (resolve => {
-	push ({ kind: 'choice',
-		options: options as ChoiceOptions<string>,
-		resolve: resolve as (value: string | null) => void })
-      }) }), [push])
-
-  const active = queue[0]
-
-  return (
-      <DialogueContext.Provider value={api}>
-	{children}
-
-	<Dialog
-	    open={Boolean (active)}
-	    onOpenChange={open => {
-	      if (!(open))
-		closeActive (active?.kind !== 'confirm' && null)
-	    }}>
-	  {active && (
-	      <DialogContent className="px-6 pb-6 pt-7">
-		<DialogHeader className="pl-8">
-		  <DialogTitle>{active.options.title}</DialogTitle>
-
-		  {active.options.description && (
-		      <DialogDescription asChild>
-			<div>{active.options.description}</div>
-		      </DialogDescription>)}
-		</DialogHeader>
-
-		<DialogFooter>
-		  {active.kind === 'confirm' && (
-		      <>
-			<Button
-			    variant="outline"
-			    onClick={() => closeActive (false)}>
-			  {active.options.cancelText ?? '取消'}
-			</Button>
-
-			<Button
-			    variant={(active.options.variant === 'danger')
-				     ? 'destructive'
-				     : 'default'}
-			    onClick={() => closeActive (true)}>
-			  {active.options.confirmText ?? '確定'}
-			</Button>
-		      </>)}
-
-		  {active.kind === 'alert' && (
-		      <Button onClick={() => closeActive ()}>
-			{active.options.okText ?? '確定'}
-		      </Button>)}
-
-		  {active.kind === 'choice' && (
-		      <>
-			<Button
-			    variant="outline"
-			    onClick={() => closeActive (null)}>
-			  {active.options.cancelText ?? '取消'}
-			</Button>
-
-			{active.options.choices.map (choice => (
-			    <Button
-				key={choice.value}
-				variant={(choice.variant === 'danger')
-					 ? 'destructive'
-					 : 'default'}
-				onClick={() => closeActive (choice.value)}>
-			      {choice.label}
-			    </Button>))}
-		      </>)}
-		</DialogFooter>
-	      </DialogContent>)}
-	</Dialog>
-      </DialogueContext.Provider>)
-}) satisfies FC<Props>
-
-
-export const useDialogue = () => {
-  const dialogue = useContext (DialogueContext)
-
-  if (!(dialogue))
-    throw new Error ('useDialogue must be used inside DialogueProvider')
-
-  return dialogue
-}

frontend/src/components/ui/button.tsx

@@ -4,47 +4,34 @@ import { cva, type VariantProps } from "class-variance-authority"
 
 import { cn } from "@/lib/utils"
 
-const buttonVariants = cva (
-  [
-    'inline-flex items-center justify-center gap-2 whitespace-nowrap',
-    'rounded-md text-sm font-medium transition-colors',
-    'focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-slate-400',
-    'disabled:pointer-events-none disabled:opacity-50',
-    '[&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0',
-  ].join (' '),
+const buttonVariants = cva(
+  "inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-md text-sm font-medium ring-offset-background transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:pointer-events-none disabled:opacity-50 [&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0",
   {
     variants: {
       variant: {
-        default:
-          'bg-slate-900 text-white hover:bg-slate-700 dark:bg-slate-100 dark:text-slate-900 dark:hover:bg-slate-300',
-
+        default: "bg-primary text-primary-foreground hover:bg-primary/90",
         destructive:
-          'bg-red-600 text-white hover:bg-red-700 dark:bg-red-700 dark:hover:bg-red-600',
-
+          "bg-destructive text-destructive-foreground hover:bg-destructive/90",
         outline:
-          'border border-slate-300 bg-white text-slate-900 hover:bg-slate-100 dark:border-slate-700 dark:bg-slate-900 dark:text-slate-100 dark:hover:bg-slate-800',
-
+          "border border-input bg-background hover:bg-accent hover:text-accent-foreground",
         secondary:
-          'bg-slate-100 text-slate-900 hover:bg-slate-200 dark:bg-slate-800 dark:text-slate-100 dark:hover:bg-slate-700',
-
-        ghost:
-          'text-slate-900 hover:bg-slate-100 dark:text-slate-100 dark:hover:bg-slate-800',
-
-        link:
-          'text-blue-700 underline-offset-4 hover:underline dark:text-blue-300',
+          "bg-secondary text-secondary-foreground hover:bg-secondary/80",
+        ghost: "hover:bg-accent hover:text-accent-foreground",
+        link: "text-primary underline-offset-4 hover:underline",
       },
       size: {
-        default: 'h-10 px-4 py-2',
-        sm:      'h-9 rounded-md px-3',
-        lg:      'h-11 rounded-md px-8',
-        icon:    'h-10 w-10',
+        default: "h-10 px-4 py-2",
+        sm: "h-9 rounded-md px-3",
+        lg: "h-11 rounded-md px-8",
+        icon: "h-10 w-10",
       },
     },
     defaultVariants: {
-      variant: 'default',
-      size:    'default',
+      variant: "default",
+      size: "default",
     },
-  })
+  }
+)
 
 export interface ButtonProps
   extends React.ButtonHTMLAttributes<HTMLButtonElement>,

frontend/src/components/ui/dialog.tsx

@@ -37,29 +37,25 @@ const DialogContent = React.forwardRef<
     <DialogOverlay />
     <DialogPrimitive.Content
       ref={ref}
-      className={cn (
-	  'fixed left-[50%] top-[50%] z-50 grid w-[calc(100%-2rem)] max-w-lg',
+      className={cn(
+	  'fixed left-[50%] top-[50%] z-50 w-[90%] grid max-w-lg',
 	  'translate-x-[-50%] translate-y-[-50%]',
-	  'gap-5 rounded-2xl border border-border',
-	  'bg-background p-6 text-foreground shadow-2xl',
-	  'duration-200',
+	  'gap-4 border bg-gray-300/80 dark:bg-gray-700/80',
+	  'p-6 shadow-lg duration-200',
 	  'data-[state=open]:animate-in data-[state=closed]:animate-out',
 	  'data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0',
 	  'data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95',
+	  'data-[state=closed]:slide-out-to-left-1/2',
+	  'data-[state=closed]:slide-out-to-top-[48%]',
+	  'data-[state=open]:slide-in-from-left-1/2',
+	  'data-[state=open]:slide-in-from-top-[48%] rounded-lg',
 	  className)}
       {...props}
     >
       {children}
-
-      <DialogPrimitive.Close
-	  className={cn (
-	      'absolute left-4 top-4 rounded-full p-1',
-	      'text-slate-500 transition-colors',
-	      'hover:bg-slate-200 hover:text-slate-900',
-	      'dark:text-slate-400 dark:hover:bg-slate-700 dark:hover:text-slate-50',
-	      'focus:outline-none focus:ring-2 focus:ring-slate-400')}>
-	<X className="h-4 w-4"/>
-	<span className="sr-only">閉ぢる</span>
+      <DialogPrimitive.Close className="absolute right-4 top-4 bg-red-500 rounded-sm opacity-70 ring-offset-background transition-opacity hover:opacity-100 focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2 disabled:pointer-events-none data-[state=open]:bg-accent data-[state=open]:text-muted-foreground">
+        <X className="h-3 w-3" />
+        <span className="sr-only">Close</span>
       </DialogPrimitive.Close>
     </DialogPrimitive.Content>
   </DialogPortal>

frontend/src/components/users/InheritDialogue.tsx

@@ -1,12 +1,9 @@
 import { useState } from 'react'
 
-import { useDialogue } from '@/components/dialogues/DialogueProvider'
 import { Button } from '@/components/ui/button'
 import { Dialog,
-	 DialogContent,
-	 DialogDescription,
-	 DialogHeader,
-	 DialogTitle } from '@/components/ui/dialog'
+         DialogContent,
+         DialogTitle } from '@/components/ui/dialog'
 import { Input } from '@/components/ui/input'
 import { toast } from '@/components/ui/use-toast'
 import { apiPost } from '@/lib/api'
@@ -19,16 +16,10 @@ type Props = { visible:         boolean
 
 
 export default ({ visible, onVisibleChange, setUser }: Props) => {
-  const dialogue = useDialogue ()
-
   const [inputCode, setInputCode] = useState ('')
 
   const handleTransfer = async () => {
-    if (!(await dialogue.confirm ({
-	title: '引継ぎを行ってもよろしいですか?',
-	description: '現在のアカウントからはログアウトされます．',
-	confirmText: '引継ぐ',
-	variant: 'danger' })))
+    if (!(confirm ('引継ぎを行ってもよろしいですか?\n現在のアカウントからはログアウトされます．')))
       return
 
     try
@@ -53,18 +44,14 @@ export default ({ visible, onVisibleChange, setUser }: Props) => {
 
   return (
       <Dialog open={visible} onOpenChange={onVisibleChange}>
-	<DialogContent className="px-6 pp-6 pt-7">
-	  <DialogHeader className="pl-8">
-	    <DialogTitle>ほかのブラウザから引継ぐ</DialogTitle>
-	    <DialogDescription asChild>
-	      <div className="flex gap-2">
-		<Input placeholder="引継ぎコードを入力"
-		       value={inputCode}
-		       onChange={ev => setInputCode (ev.target.value)}/>
-		<Button onClick={handleTransfer}>引継ぐ</Button>
-	      </div>
-	    </DialogDescription>
-	  </DialogHeader>
+	<DialogContent>
+	  <DialogTitle>ほかのブラウザから引継ぐ</DialogTitle>
+	  <div className="flex gap-2">
+	    <Input placeholder="引継ぎコードを入力"
+		   value={inputCode}
+		   onChange={ev => setInputCode (ev.target.value)}/>
+	    <Button onClick={handleTransfer}>引継ぐ</Button>
+	  </div>
 	</DialogContent>
       </Dialog>)
 }

frontend/src/components/users/UserCodeDialogue.tsx

@@ -1,10 +1,6 @@
-import { useDialogue } from '@/components/dialogues/DialogueProvider'
 import { Button } from '@/components/ui/button'
 import { Dialog,
 	 DialogContent,
-	 DialogDescription,
-	 DialogFooter,
-	 DialogHeader,
 	 DialogTitle } from '@/components/ui/dialog'
 import { toast } from '@/components/ui/use-toast'
 import { apiPost } from '@/lib/api'
@@ -18,20 +14,11 @@ type Props = { visible:         boolean
 
 
 export default ({ visible, onVisibleChange, user, setUser }: Props) => {
-  const dialogue = useDialogue ()
-
   const handleChange = async () => {
     if (!(user))
       return
 
-    if (!(await dialogue.confirm ({
-	title: '引継ぎコードを再発行しますか?',
-	description: (
-	    <div>
-	      <p>再発行するとほかのブラウザからはログアウトされます．</p>
-	    </div>),
-	confirmText: '再発行',
-	variant: 'danger' })))
+    if (!(confirm ('引継ぎコードを再発行しますか?\n再発行するとほかのブラウザからはログアウトされます．')))
       return
 
     const data = await apiPost<{ code: string }> ('/users/code/renew', { },
@@ -46,26 +33,21 @@ export default ({ visible, onVisibleChange, user, setUser }: Props) => {
 
   return (
       <Dialog open={visible} onOpenChange={onVisibleChange}>
-	<DialogContent className="px-6 pb-6 pt-7">
-	  <DialogHeader className="pl-8">
-	    <DialogTitle>引継ぎコード</DialogTitle>
-
-	    <DialogDescription asChild>
-	      <div>
-		<p>あなたの引継ぎコードはこちらです：</p>
-		<div className="m-2">{user?.inheritanceCode}</div>
-		<p className="mt-1 text-sm text-destructive">
-		  このコードはほかの人には教えないでください!
-		</p>
-	      </div>
-	    </DialogDescription>
-	  </DialogHeader>
-
-	  <DialogFooter>
-	    <Button onClick={handleChange} variant="destructive">
-	      引継ぎコード再発行
-	    </Button>
-	  </DialogFooter>
+	<DialogContent>
+	  <DialogTitle>引継ぎコード</DialogTitle>
+	  <div>
+	    <p>あなたの引継ぎコードはこちらです：</p>
+	    <div className="m-2">{user?.inheritanceCode}</div>
+	    <p className="mt-1 text-sm text-red-500">
+	      このコードはほかの人には教えないでください!
+	    </p>
+	    <div className="my-4">
+	      <Button onClick={handleChange}
+		      className="px-4 py-2 bg-red-600 text-white rounded disabled:bg-gray-400">
+		引継ぎコード再発行
+	      </Button>
+	    </div>
+	  </div>
 	</DialogContent>
       </Dialog>)
 }

frontend/src/consts.ts

@@ -1,4 +1,4 @@
-import type { Category, Platform } from 'types'
+import type { Category } from 'types'
 
 export const LIGHT_COLOUR_SHADE = 800
 export const DARK_COLOUR_SHADE = 300
@@ -31,11 +31,6 @@ export const FETCH_POSTS_ORDER_FIELDS = [
     'updated_at',
     ] as const
 
-export const PLATFORMS = ['nico', 'youtube'] as const
-
-export const PLATFORM_NAMES: Record<Platform, string> =
-    { nico: 'ニコニコ', youtube: 'YouTube' } as const
-
 export const TAG_COLOUR = {
     deerjikist: 'rose',
     meme:       'purple',

frontend/src/index.css

@@ -6,56 +6,6 @@
 
 @layer base
 {
-  :root
-  {
-    --background: 0 0% 100%;
-    --foreground: 222.2 84% 4.9%;
-
-    --primary: 222.2 47.4% 11.2%;
-    --primary-foreground: 210 40% 98%;
-
-    --secondary: 210 40% 96.1%;
-    --secondary-foreground: 222.2 47.4% 11.2%;
-
-    --destructive: 0 72.2% 50.6%;
-    --destructive-foreground: 210 40% 98%;
-
-    --muted: 210 40% 96.1%;
-    --muted-foreground: 215.4 16.3% 46.9%;
-
-    --accent: 210 40% 96.1%;
-    --accent-foreground: 222.2 47.4% 11.2%;
-
-    --border: 214.3 31.8% 91.4%;
-    --input: 214.3 31.8% 91.4%;
-    --ring: 222.2 84% 4.9%;
-  }
-
-  .dark
-  {
-    --background: 222.2 84% 4.9%;
-    --foreground: 210 40% 98%;
-
-    --primary: 210 40% 98%;
-    --primary-foreground: 222.2 47.4% 11.2%;
-
-    --secondary: 217.2 32.6% 17.5%;
-    --secondary-foreground: 210 40% 98%;
-
-    --destructive: 0 62.8% 45%;
-    --destructive-foreground: 210 40% 98%;
-
-    --muted: 217.2 32.6% 17.5%;
-    --muted-foreground: 215 20.2% 65.1%;
-
-    --accent: 217.2 32.6% 17.5%;
-    --accent-foreground: 210 40% 98%;
-
-    --border: 217.2 32.6% 17.5%;
-    --input: 217.2 32.6% 17.5%;
-    --ring: 212.7 26.8% 83.9%;
-  }
-
   body
   {
     @apply overflow-x-clip;
@@ -104,6 +54,34 @@ body
   min-height: 100dvh;
 }
 
+h1
+{
+  font-size: 3.2em;
+  line-height: 1.1;
+}
+
+button
+{
+  border-radius: 8px;
+  border: 1px solid transparent;
+  padding: 0.6em 1.2em;
+  font-size: 1em;
+  font-weight: 500;
+  font-family: inherit;
+  background-color: #1a1a1a;
+  cursor: pointer;
+  transition: border-color 0.25s;
+}
+button:hover
+{
+  border-color: #646cff;
+}
+button:focus,
+button:focus-visible
+{
+  outline: 4px auto -webkit-focus-ring-color;
+}
+
 @media (prefers-color-scheme: light)
 {
   :root

frontend/src/lib/posts.ts

@@ -1,4 +1,4 @@
-import { apiDelete, apiGet, apiPost, apiPut } from '@/lib/api'
+import { apiDelete, apiGet, apiPost } from '@/lib/api'
 
 import type { FetchPostsParams, Post, PostVersion } from '@/types'
 
@@ -42,30 +42,6 @@ export const fetchPostChanges = async (
 						     page, limit } })
 
 
-export const updatePost = async (
-    post: { id:                     number
-	    title:                  string | null
-	    tags:                   string
-	    parentPostIds:          string
-	    originalCreatedFrom:    string | null
-	    originalCreatedBefore:  string | null },
-    { baseVersionNo, force, merge }: {
-	baseVersionNo?: number
-	force?:         boolean
-	merge?:         boolean }
-) =>
-    await apiPut<Post> (
-	`/posts/${ post.id }`,
-	{ title: post.title,
-	  tags: post.tags,
-	  parent_post_ids: post.parentPostIds,
-	  original_created_from: post.originalCreatedFrom,
-	  original_created_before: post.originalCreatedBefore },
-	{ params: { ...(baseVersionNo && { base_version_no: String (baseVersionNo) }),
-	            force: force ? '1' : '0',
-		    merge: merge ? '1' : '0' } })
-
-
 export const toggleViewedFlg = async (id: string, viewed: boolean): Promise<void> => {
   await (viewed ? apiPost : apiDelete) (`/posts/${ id }/viewed`)
 }

frontend/src/lib/queryKeys.ts

@@ -9,12 +9,11 @@ export const postsKeys = {
 		  ['posts', 'changes', p] as const }
 
 export const tagsKeys = {
-    root:         ['tags'] as const,
-    index:        (p: FetchTagsParams) => ['tags', 'index', p] as const,
-    show:         (name: string) => ['tags', name] as const,
-    changes:      (p: { id?: string; page: number; limit: number }) =>
-		      ['tags', 'changes', p] as const,
-    deerjikists:  (id: string) => ['tags', 'deerjikists', id] as const }
+    root:     ['tags'] as const,
+    index:    (p: FetchTagsParams) => ['tags', 'index', p] as const,
+    show:     (name: string) => ['tags', name] as const,
+    changes:  (p: { id?: string; page: number; limit: number }) =>
+		  ['tags', 'changes', p] as const }
 
 export const wikiKeys = {
     root:   ['wiki'] as const,

frontend/src/lib/tags.ts

@@ -1,6 +1,6 @@
 import { apiGet } from '@/lib/api'
 
-import type { Deerjikist, FetchTagsParams, Tag, TagVersion } from '@/types'
+import type { FetchTagsParams, Tag, TagVersion } from '@/types'
 
 
 export const fetchTags = async (
@@ -56,9 +56,3 @@ export const fetchTagChanges = async (
     versions: TagVersion[]
     count:    number }> =>
 	await apiGet ('/tags/versions', { params: { ...(id && { id }), page, limit } })
-
-
-export const fetchDeerjikistsByTag = async (
-    id: string,
-): Promise<{ tag: Tag; deerjikists: Deerjikist[]}> =>
-    await apiGet (`/tags/${ id }/deerjikists`)

frontend/src/pages/deerjikists/DeerjikistDetailPage.tsx

@@ -1,155 +0,0 @@
-import { useQuery, useQueryClient } from '@tanstack/react-query'
-import { useEffect, useState } from 'react'
-import { useParams } from 'react-router-dom'
-
-import TagLink from '@/components/TagLink'
-import Label from '@/components/common/Label'
-import PageTitle from '@/components/common/PageTitle'
-import MainArea from '@/components/layout/MainArea'
-import { toast } from '@/components/ui/use-toast'
-import { PLATFORM_NAMES, PLATFORMS } from '@/consts'
-import { apiPut } from '@/lib/api'
-import { tagsKeys } from '@/lib/queryKeys'
-import { fetchDeerjikistsByTag } from '@/lib/tags'
-import { cn } from '@/lib/utils'
-
-import type { FC, FormEvent } from 'react'
-
-import type { Deerjikist, Platform } from '@/types'
-
-
-export default (() => {
-  const { id } = useParams ()
-  const tagId = String (id ?? '')
-  const tagKey = tagsKeys.deerjikists (tagId)
-
-  const { data: qData, isLoading: loading } =
-      useQuery ({ queryKey: tagKey, queryFn: () => fetchDeerjikistsByTag (tagId) })
-  const tag = qData?.tag
-  const deerjikists = qData?.deerjikists ?? []
-
-  const [data, setData] =
-      useState<(Omit<Deerjikist, 'platform'> & { platform: Platform | null })[]> ([])
-  const [disabled, setDisabled] = useState (true)
-
-  const qc = useQueryClient ()
-
-  const handleSubmit = async (e: FormEvent) => {
-    e.preventDefault ()
-
-    try
-    {
-      setDisabled (true)
-
-      setData (await apiPut<Deerjikist[]> (`/tags/${ id }/deerjikists`, data))
-      qc.invalidateQueries ({ queryKey: tagsKeys.root })
-
-      toast ({ description: '更新しました．' })
-    }
-    catch
-    {
-      toast ({ title: '更新失敗', description: '入力内容を確認してください．' })
-    }
-    finally
-    {
-      setDisabled (false)
-    }
-  }
-
-  useEffect (() => {
-    if (!(tag))
-      {
-	setDisabled (true)
-	return
-      }
-
-    setData (deerjikists)
-    setDisabled (false)
-  }, [tag, deerjikists])
-
-  return (
-      <MainArea>
-	{(loading || !(tag)) ? 'Loading...' : (
-	    <div className="max-w-xl">
-	      <PageTitle>
-		<TagLink tag={tag} withWiki={false} withCount={false}/>
-	      </PageTitle>
-
-	      <form onSubmit={handleSubmit} className="my-4 space-y-2">
-		{data.map ((datum, i) => (
-		    <fieldset key={i} className="min-w-0 rounded-lg border border-gray-300
-						 dark:border-gray-700 p-4">
-		      <legend className="px-2 text-sm font-semibold text-gray-700
-					 dark:text-gray-300">
-			<button
-			    type="button"
-			    disabled={disabled}
-			    onClick={() => setData (prev => [...prev.slice (0, i),
-							     ...prev.slice (i + 1)])}>
-			  #{i + 1}
-			</button>
-		      </legend>
-
-		      {/* プラットフォーム */}
-		      <div>
-			<Label>プラットフォーム</Label>
-			<select
-			    className="w-full border p-2 rounded"
-			    disabled={disabled}
-			    value={datum.platform ?? ''}
-			    onChange={e => setData (prev => {
-			      const rtn = [...prev]
-			      rtn[i] = { ...rtn[i],
-					 platform: (e.target.value || null) as Platform | null }
-			      return rtn
-			    })}>
-			  <option value="">&nbsp;</option>
-			  {PLATFORMS.map (p => (
-			      <option key={p} value={p}>
-				{PLATFORM_NAMES[p]}
-			      </option>))}
-			</select>
-		      </div>
-
-		      {/* コード */}
-		      <div>
-			<Label>コード</Label>
-			<input
-			    type="text"
-			    disabled={disabled}
-			    className="w-full border p-2 rounded"
-			    value={datum.code}
-			    onChange={e => setData (prev => {
-			      const rtn = [...prev]
-			      rtn[i] = { ...rtn[i], code: e.target.value }
-			      return rtn
-			    })}/>
-		      </div>
-		    </fieldset>
-		))}
-
-		<div className="py-3">
-		  <button
-		      type="button"
-		      disabled={disabled}
-		      onClick={() => setData (prev => [...prev, { platform: null, code: '' }])}>
-		    +
-		  </button>
-		</div>
-
-		<div className="py-3">
-		  <button
-		      type="submit"
-		      disabled={disabled}
-		      className={cn ('px-4 py-2 rounded',
-				     (disabled
-				      ? 'text-gray-300 bg-gray-500'
-				      : 'text-white bg-blue-500'))}>
-		    更新
-		  </button>
-		</div>
-	      </form>
-	    </div>
-	)}
-      </MainArea>)
-}) satisfies FC

frontend/src/pages/posts/PostDetailPage.tsx

@@ -21,7 +21,7 @@ import ServiceUnavailable from '@/pages/ServiceUnavailable'
 
 import type { FC } from 'react'
 
-import type { NiconicoViewerHandle, Post, User } from '@/types'
+import type { NiconicoViewerHandle, User } from '@/types'
 
 type Props = { user: User | null }
 
@@ -108,34 +108,6 @@ export default (({ user }: Props) => {
 	  {post
 	   ? (
 	      <>
-		{(post.childPosts ?? []).length > 0 && (
-		    <div className="mb-4 bg-green-200 dark:bg-green-800 text-sm p-2 rounded-md">
-		      <p>この投稿には {post.childPosts!.length} 件の子投稿があります．</p>
-		      <PostList posts={[{ ...post, childPosts: [{ } as Post] },
-					...post.childPosts!.map (p => ({
-					    ...p, parentPosts: [{ } as Post] }))]}/>
-		    </div>
-		)}
-		{(post.parentPosts ?? []).map (pp => {
-		  const siblings = post.siblingPosts?.[String (pp.id) as `${ number }`]
-		  if (!(siblings))
-		    return
-
-		  return (
-		      <div
-			  key={pp.id}
-			  className="mb-4 bg-yellow-200 dark:bg-yellow-800 text-sm p-2 rounded-md">
-			<p>
-			  この投稿には 1 件の親投稿{
-			      siblings.length > 1
-			      && `と ${ siblings.length - 1 } 件の姉妹投稿`}があります．
-			</p>
-			<PostList posts={[{ ...pp, childPosts: [{ } as Post] },
-					  ...siblings.map (p => ({
-					      ...p, parentPosts: [{ } as Post] }))]}/>
-		      </div>)
-		})}
-
 		{(post.thumbnail || post.thumbnailBase) && (
 		    <motion.div
 			layoutId={`page-${ id }`}
@@ -174,6 +146,7 @@ export default (({ user }: Props) => {
 					       (prev: any) => newPost ?? prev)
 			      qc.invalidateQueries ({ queryKey: postsKeys.root })
 			      qc.invalidateQueries ({ queryKey: tagsKeys.root })
+			      toast ({ description: '更新しました．' })
 			    }}/>
 		      </Tab>)}
 		</TabGroup>

frontend/src/pages/posts/PostHistoryPage.tsx

@@ -8,18 +8,16 @@ import TagLink from '@/components/TagLink'
 import PrefetchLink from '@/components/PrefetchLink'
 import PageTitle from '@/components/common/PageTitle'
 import Pagination from '@/components/common/Pagination'
-import { useDialogue } from '@/components/dialogues/DialogueProvider'
 import MainArea from '@/components/layout/MainArea'
 import { toast } from '@/components/ui/use-toast'
 import { SITE_TITLE } from '@/config'
-import { fetchPostChanges, updatePost } from '@/lib/posts'
+import { apiPut } from '@/lib/api'
+import { fetchPostChanges } from '@/lib/posts'
 import { postsKeys, tagsKeys } from '@/lib/queryKeys'
 import { fetchTag } from '@/lib/tags'
 import { cn, dateString, originalCreatedAtString } from '@/lib/utils'
 
-import type { FC, MouseEvent } from 'react'
-
-import type { PostVersion } from '@/types'
+import type { FC } from 'react'
 
 
 const renderDiff = (diff: { current: string | null; prev: string | null }) => (
@@ -36,8 +34,6 @@ const renderDiff = (diff: { current: string | null; prev: string | null }) => (
 
 
 export default (() => {
-  const dialogue = useDialogue ()
-
   const location = useLocation ()
   const query = new URLSearchParams (location.search)
   const id = query.get ('id')
@@ -66,48 +62,6 @@ export default (() => {
 
   const qc = useQueryClient ()
 
-  const handleRevert = async (e: MouseEvent<HTMLAnchorElement>, change: PostVersion) => {
-    e.preventDefault ()
-
-    if (!(await dialogue.confirm ({
-	title: '差戻の確認',
-	description: `『${ change.title.current || change.url.current }』を版 ${
-	    change.versionNo } に差戻します．\nよろしいですか?`,
-	confirmText: '差戻' })))
-      return
-
-    try
-    {
-      const id = change.postId
-      const title = change.title.current
-      const tags =
-	  change.tags
-	  .filter (t => t.type !== 'removed')
-	  .map (t => t.name)
-	  .filter (t => t.slice (0, 5) !== 'nico:')
-	  .join (' ')
-      const parentPostIds =
-	  (change.parentPosts ?? [])
-	  .filter (p => p.type !== 'removed')
-	  .map (p => p.id)
-	  .join (' ')
-      const originalCreatedFrom = change.originalCreatedFrom.current
-      const originalCreatedBefore = change.originalCreatedBefore.current
-      await updatePost ({ id, title, tags, parentPostIds,
-			  originalCreatedFrom, originalCreatedBefore },
-		        { force: true })
-
-      qc.invalidateQueries ({ queryKey: postsKeys.root })
-      qc.invalidateQueries ({ queryKey: tagsKeys.root })
-
-      toast ({ description: '差戻しました．' })
-    }
-    catch
-    {
-      toast ({ description: '差戻に失敗……' })
-    }
-  }
-
   useEffect (() => {
     document.querySelector ('table')?.scrollIntoView ({ behavior: 'smooth' })
   }, [location.search])
@@ -141,8 +95,6 @@ export default (() => {
 		    <col className="w-96"/>
 		    {/* タグ */}
 		    <col className="w-[48rem]"/>
-		    {/* TODO: 親投稿 */}
-		    {/* <col className="w-[48rem]"/> */}
 		    {/* オリジナルの投稿日時 */}
 		    <col className="w-96"/>
 		    {/* 更新日時 */}
@@ -158,8 +110,6 @@ export default (() => {
 		      <th className="p-2 text-left">タイトル</th>
 		      <th className="p-2 text-left">URL</th>
 		      <th className="p-2 text-left">タグ</th>
-		      {/* TODO: 親投稿の履歴 */}
-		      {/* <th className="p-2 text-left">親投稿</th> */}
 		      <th className="p-2 text-left">オリジナルの投稿日時</th>
 		      <th className="p-2 text-left">更新日時</th>
 		      <th className="p-2"/>
@@ -230,29 +180,6 @@ export default (() => {
 					    {tag.name}
 					  </span>))))}
 			    </td>
-			    {/* TODO: 親投稿の履歴 */}
-			    {/* <td className="p-2">
-			      {change.parentPosts.map ((pp, i) => (
-				  pp.type === 'added'
-				  ? (
-				      <ins
-					  key={i}
-					  className="mr-2 text-green-600 dark:text-green-400">
-					{pp.title}
-				      </ins>)
-				  : (
-				      pp.type === 'removed'
-				      ? (
-					  <del
-					      key={i}
-					      className="mr-2 text-red-600 dark:text-red-400">
-					    {pp.title}
-					  </del>)
-				      : (
-					  <span key={i} className="mr-2">
-					    {pp.title}
-					  </span>))))}
-			    </td> */}
 			    <td className="p-2">
 			      {change.versionNo === 1
 			       ? originalCreatedAtString (change.originalCreatedFrom.current,
@@ -277,7 +204,41 @@ export default (() => {
 			      {dateString (change.createdAt)}
 			    </td>
 			    <td className="p-2">
-			      <a href="#" onClick={async e => await handleRevert (e, change)}>
+			      <a
+				  href="#"
+				  onClick={async e => {
+				    e.preventDefault ()
+
+				    if (!(confirm (
+					`『${ change.title.current
+					      || change.url.current }』を版 ${
+					change.versionNo } に差戻します．\nよろしいですか?`)))
+				      return
+
+				    try
+				    {
+				      await apiPut (
+					  `/posts/${ change.postId }`,
+					  { title: change.title.current,
+					    tags: change.tags
+						  .filter (t => t.type !== 'removed')
+						  .map (t => t.name)
+						  .filter (t => t.slice (0, 5) !== 'nico:')
+						  .join (' '),
+					    original_created_from:
+						change.originalCreatedFrom.current,
+					    original_created_before:
+						change.originalCreatedBefore.current })
+
+				      qc.invalidateQueries ({ queryKey: postsKeys.root })
+				      qc.invalidateQueries ({ queryKey: tagsKeys.root })
+				      toast ({ description: '差戻しました．' })
+				    }
+				    catch
+				    {
+				      toast ({ description: '差戻に失敗……' })
+				    }
+				  }}>
 				復元
 			      </a>
 			    </td>

frontend/src/pages/posts/PostNewPage.tsx

@@ -29,7 +29,6 @@ export default (({ user }: Props) => {
 
   const [originalCreatedBefore, setOriginalCreatedBefore] = useState<string | null> (null)
   const [originalCreatedFrom, setOriginalCreatedFrom] = useState<string | null> (null)
-  const [parentPostIds, setParentPostIds] = useState ('')
   const [tags, setTags] = useState ('')
   const [thumbnailAutoFlg, setThumbnailAutoFlg] = useState (true)
   const [thumbnailFile, setThumbnailFile] = useState<File | null> (null)
@@ -47,7 +46,6 @@ export default (({ user }: Props) => {
     formData.append ('title', title)
     formData.append ('url', url)
     formData.append ('tags', tags)
-    formData.append ('parent_post_ids', parentPostIds)
     if (thumbnailFile)
       formData.append ('thumbnail', thumbnailFile)
     if (originalCreatedFrom)
@@ -179,16 +177,6 @@ export default (({ user }: Props) => {
 		     className="mt-2 max-h-48 rounded border"/>)}
 	  </div>
 
-	  {/* 親投稿 */}
-	  <div>
-	    <Label>親投稿</Label>
-	    <input
-		type="text"
-		value={parentPostIds}
-		onChange={e => setParentPostIds (e.target.value)}
-		className="w-full border p-2 rounded"/>
-	  </div>
-
 	  {/* タグ */}
 	  <PostFormTagsArea tags={tags} setTags={setTags}/>
 

frontend/src/types.ts

@@ -1,6 +1,5 @@
 import { CATEGORIES,
 	 FETCH_POSTS_ORDER_FIELDS,
-	 PLATFORMS,
 	 USER_ROLES,
 	 ViewFlagBehavior } from '@/consts'
 
@@ -8,8 +7,6 @@ import type { ReactNode } from 'react'
 
 export type Category = typeof CATEGORIES[number]
 
-export type Deerjikist = { platform: Platform; code: string }
-
 export type FetchPostsOrder = `${ FetchPostsOrderField }:${ 'asc' | 'desc' }`
 
 export type FetchPostsOrderField = typeof FETCH_POSTS_ORDER_FIELDS[number]
@@ -117,19 +114,13 @@ export type NiconicoViewerHandle = {
     showComments: () => void
     hideComments: () => void }
 
-export type Platform = typeof PLATFORMS[number]
-
 export type Post = {
     id:                     number
-    versionNo:              number
     url:                    string
     title:                  string | null
     thumbnail:              string | null
     thumbnailBase:          string | null
     tags:                   Tag[]
-    parentPosts?:           Post[]
-    childPosts?:            Post[]
-    siblingPosts?:          Record<`${ number }`, Post[]>
     viewed:                 boolean
     related:                Post[]
     originalCreatedFrom:    string | null
@@ -147,18 +138,13 @@ export type PostTagChange = {
 
 export type PostVersion = {
     postId:                 number
-    latestVersionNo:        number
     versionNo:              number
     eventType:              'create' | 'update' | 'discard' | 'restore'
     title:                  { current: string | null; prev: string | null }
     url:                    { current: string; prev: string | null }
     thumbnail:              { current: string | null; prev: string | null }
     thumbnailBase:          { current: string | null; prev: string | null }
-    tags:                   { name: string
-			      type: 'context' | 'added' | 'removed' }[]
-    parentPosts:            { id: number
-			      title: string
-			      type: 'context' | 'added' | 'removed' }[]
+    tags:                   { name: string; type: 'context' | 'added' | 'removed' }[]
     originalCreatedFrom:    { current: string | null; prev: string | null }
     originalCreatedBefore:  { current: string | null; prev: string | null }
     createdAt:              string
@@ -185,8 +171,7 @@ export type Tag = {
     createdAt:      string
     updatedAt:      string
     hasWiki:        boolean
-    materialId:     number | null
-    hasDeerjikists: boolean
+    materialId:     number
     children?:      Tag[]
     matchedAlias?:  string | null }
 

frontend/tailwind.config.js

@@ -19,22 +19,7 @@ export default {
 		'rainbow-scroll': 'rainbow-scroll .25s linear infinite' },
 	    colors: {
 		red: { 925: '#5f1414',
-		       975: '#230505' },
-		border: 'hsl(var(--border))',
-		input: 'hsl(var(--input))',
-		ring: 'hsl(var(--ring))',
-		background: 'hsl(var(--background))',
-		foreground: 'hsl(var(--foreground))',
-		primary: { DEFAULT: 'hsl(var(--primary))',
-			   foreground: 'hsl(var(--primary-foreground))' },
-		secondary: { DEFAULT: 'hsl(var(--secondary))',
-			     foreground: 'hsl(var(--secondary-foreground))' },
-		destructive: { DEFAULT: 'hsl(var(--destructive))',
-			       foreground: 'hsl(var(--destructive-foreground))' },
-		muted: { DEFAULT: 'hsl(var(--muted))',
-			 foreground: 'hsl(var(--muted-foreground))' },
-		accent: { DEFAULT: 'hsl(var(--accent))',
-			  foreground: 'hsl(var(--accent-foreground))' } },
+		       975: '#230505' } },
 	    keyframes: {
 		'rainbow-scroll': {
 		    '0%':   { backgroundPosition: '0% 50%' },