#55

backend/app/controllers/application_controller.rb

@@ -92,4 +92,6 @@ class ApplicationController < ActionController::API
 
     value
   end
+
+  def resolve_locale! = Locale.find_by(code: params[:locale]) || Locale.nipponese
 end

backend/app/controllers/materials_controller.rb

@@ -72,6 +72,7 @@ class MaterialsController < ApplicationController
     return head :unauthorized unless current_user
     return head :forbidden unless current_user.gte_member?
 
+    locale = resolve_locale!
     tag_name_raw = params[:tag].to_s.strip
     file = params[:file]
     file_sha256 = MaterialFileSha256.from_upload(file)
@@ -89,7 +90,7 @@ class MaterialsController < ApplicationController
 
     begin
       Material.transaction do
-        tag = resolve_material_tag!(tag_name_raw)
+        tag = resolve_material_tag!(locale, tag_name_raw)
         material = Material.new(tag:, url:,
                                 created_by_user: current_user,
                                 updated_by_user: current_user)
@@ -236,10 +237,8 @@ class MaterialsController < ApplicationController
     nil
   end
 
-  def resolve_material_tag! tag_name_raw
-    tag_name = TagName.find_or_create_by!(name: tag_name_raw)
-    tag = tag_name.tag
-    tag || Tag.create!(tag_name:, category: :material)
+  def resolve_material_tag! locale, tag_name_raw
+    Tag.find_or_create_by_tag_name!(locale, tag_name_raw, category: :material)
   end
 
   def material_index_needs_tag_name? filters

backend/app/controllers/nico_tags_controller.rb

@@ -70,6 +70,8 @@ class NicoTagsController < ApplicationController
     return head :unauthorized unless current_user
     return head :forbidden unless current_user.gte_member?
 
+    locale = resolve_locale!
+
     id = params[:id].to_i
 
     tag = Tag.find(id)
@@ -79,8 +81,9 @@ class NicoTagsController < ApplicationController
     linked_tags = nil
 
     ApplicationRecord.transaction do
-      linked_tags = Tag.normalise_tags!(linked_tag_names, with_tagme: false,
-                                                          with_no_deerjikist: false)
+      linked_tags = Tag.normalise_tags!(locale, linked_tag_names,
+                                        with_tagme: false,
+                                        with_no_deerjikist: false)
       if linked_tags.any? { |t| t.nico? }
         raise Tag::NicoTagNormalisationError
       end

backend/app/controllers/posts_controller.rb

@@ -308,6 +308,7 @@ class PostsController < ApplicationController
     base_version_no = parse_base_version_no
     return render_bad_request('base_version_no は必須です．') if !(force) && !(base_version_no)
 
+    locale = Locale.find_by(code: params[:locale].presence) || Locale.nipponese
     title = params[:title].presence
     tag_names = params[:tags].to_s.split
     original_created_from = params[:original_created_from]
@@ -329,7 +330,8 @@ class PostsController < ApplicationController
         base_snapshot = post_snapshot_from_version(base_version)
         current_snapshot = post_snapshot_from_record(post)
       end
-      incoming_snapshot = post_incoming_snapshot(title:,
+      incoming_snapshot = post_incoming_snapshot(locale:,
+                                                 title:,
                                                  original_created_from:,
                                                  original_created_before:,
                                                  tag_names:,
@@ -358,7 +360,7 @@ class PostsController < ApplicationController
             end
           end
 
-      apply_post_snapshot!(post, snapshot_to_apply)
+      apply_post_snapshot!(locale, post, snapshot_to_apply)
     end
 
     return render json: conflict_json, status: :conflict if conflict_json
@@ -685,12 +687,13 @@ class PostsController < ApplicationController
     end
   end
 
-  def post_incoming_snapshot title:, original_created_from:, original_created_before:,
+  def post_incoming_snapshot locale:, title:, original_created_from:, original_created_before:,
                              tag_names:, video_ms_param:, duration_param:, parent_post_ids:
     validate_original_created_values!(original_created_from, original_created_before)
-    Tag.normalise_tags!(tag_names, with_tagme: false, deny_deprecated: true,
-                                        with_sections: true) =>
-        { tags:, sections: }
+    Tag.normalise_tags!(locale, tag_names,
+                        with_tagme: false,
+                        deny_deprecated: true,
+                        with_sections: true) => { tags:, sections: }
 
     tags = Tag.expand_parent_tags(tags).reject(&:deprecated?)
     video_ms = normalise_video_ms(tags, video_ms_param:, duration_param:)
@@ -825,7 +828,7 @@ class PostsController < ApplicationController
     (added_by_current & removed_by_me).present? || (removed_by_current & added_by_me).present?
   end
 
-  def apply_post_snapshot! post, snapshot
+  def apply_post_snapshot! locale, post, snapshot
     PostVersionRecorder.ensure_snapshot!(post, created_by_user: current_user)
 
     post.update!(title: snapshot[:title],
@@ -833,10 +836,10 @@ class PostsController < ApplicationController
                  original_created_from: snapshot[:original_created_from],
                  original_created_before: snapshot[:original_created_before])
 
-    Tag.normalise_tags!(snapshot[:tag_names], with_tagme: false,
-                                               deny_deprecated: true,
-                                               with_sections: true) =>
-        { tags: editable_tags, sections: }
+    Tag.normalise_tags!(locale, snapshot[:tag_names],
+                        with_tagme: false,
+                        deny_deprecated: true,
+                        with_sections: true) => { tags: editable_tags, sections: }
     TagVersioning.record_tag_snapshots!(editable_tags, created_by_user: current_user)
 
     readonly_tags = post.tags.nico.to_a

backend/app/controllers/tags_controller.rb

@@ -278,6 +278,8 @@ class TagsController < ApplicationController
 
     return unless validate_tag_rename(tag, name)
 
+    locale = resolve_locale!
+
     alias_names = params[:aliases].to_s.split.uniq
     parent_names = params[:parent_tags].to_s.split.uniq
     deprecated = bool?(:deprecated)
@@ -308,7 +310,7 @@ class TagsController < ApplicationController
       alias_names.delete(name)
 
       update_aliases!(tag, alias_names)
-      update_parent_tags!(tag, parent_names)
+      update_parent_tags!(locale, tag, parent_names)
 
       tag.reload
 
@@ -659,10 +661,11 @@ class TagsController < ApplicationController
     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)
+  def update_parent_tags! locale, tag, parent_names
+    parent_tags = Tag.normalise_tags!(locale, parent_names,
+                                      with_tagme: false,
+                                      with_no_deerjikist: false,
+                                      deny_nico: true)
 
     old_parent_tags = tag.parents.to_a
 

backend/app/models/language.rb

@@ -0,0 +1,3 @@
+class Language < ApplicationRecord
+  has_many :languages, class_name: 'Locale', foreign_key: :language_code
+end

backend/app/models/locale.rb

@@ -0,0 +1,24 @@
+class Locale < ApplicationRecord
+  after_create_commit :generate_tag_names!
+
+  belongs_to :language, foreign_key: :language_code, primary_key: :code
+  belongs_to :script, foreign_key: :script_code, primary_key: :code
+
+  def self.nipponese = Locale.find('ja')
+
+  private
+
+  def generate_tag_names!
+    tag_ids = TagName.where(language_code:, primary_flg: true).pluck(:tag_id)
+    Tag.where.not(id: tag_ids).find_each do
+      TagName.create!(tag_id: _1.id,
+                      language_code:,
+                      name: TagName.generate_name(self, _1, _1.name),
+                      script_code:,
+                      primary_flg: true,
+                      # TODO: 公証実装したら書く．
+                      # auto_generated: true,
+                      canonical_id: nil)
+    end
+  end
+end

backend/app/models/script.rb

@@ -0,0 +1,3 @@
+class Script < ApplicationRecord
+  ;
+end

backend/app/models/tag.rb

@@ -52,6 +52,7 @@ class Tag < ApplicationRecord
   has_many :tag_versions
   has_many :nico_tag_versions
 
+  has_many :tag_names
   belongs_to :tag_name
   delegate :wiki_page, to: :tag_name
 
@@ -101,18 +102,20 @@ class Tag < ApplicationRecord
 
   def has_deerjikists = deerjikists.loaded? ? deerjikists.any? : deerjikists.exists?
 
-  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.tagme = find_or_create_by_tag_name!(Locale.nipponese, 'タグ希望', category: :meta)
+  def self.bot = find_or_create_by_tag_name!(Locale.nipponese, 'bot操作', category: :meta)
+  def self.no_deerjikist =
+      find_or_create_by_tag_name!(Locale.nipponese, 'ニジラー情報不詳', category: :meta)
+  def self.video = find_or_create_by_tag_name!(Locale.nipponese, '動画', category: :meta)
+  def self.niconico = find_or_create_by_tag_name!(Locale.nipponese, 'ニコニコ', category: :meta)
+  def self.youtube = find_or_create_by_tag_name!(Locale.nipponese, 'YouTube', category: :meta)
 
-  def self.normalise_tags! tag_names, with_tagme: true,
-                                      with_no_deerjikist: true,
-                                      deny_nico: true,
-                                      deny_deprecated: false,
-                                      with_sections: false
+  def self.normalise_tags! locale, tag_names,
+                           with_tagme: true,
+                           with_no_deerjikist: true,
+                           deny_nico: true,
+                           deny_deprecated: false,
+                           with_sections: false
     if deny_nico && tag_names.any? { |n| n.downcase.start_with?('nico:') }
       raise NicoTagNormalisationError
     end
@@ -141,7 +144,7 @@ class Tag < ApplicationRecord
 
       name = TagName.canonicalise(name).first
 
-      find_or_create_by_tag_name!(name, category: (cat || :general)).tap do |tag|
+      find_or_create_by_tag_name!(locale, name, category: (cat || :general)).tap do |tag|
         if deny_deprecated && tag.deprecated?
           raise DeprecatedTagNormalisationError, [tag.name]
         end
@@ -229,13 +232,25 @@ class Tag < ApplicationRecord
     [left_end_ms, right_end_ms].max
   end
 
-  def self.find_or_create_by_tag_name! name, category:
-    tn = TagName.find_or_create_by!(name: name.to_s.strip)
-    tn = tn.canonical if tn.canonical_id?
+  def self.find_or_create_by_tag_name! locale, name, category:
+    language_code = locale.language_code
+    name = name.to_s.strip
 
-    Tag.find_or_create_by!(tag_name_id: tn.id) do |t|
-      t.category = category
+    tn = TagName.find_or_create_by!(language_code:, name:) do
+      _1.script_code = locale.script_code
+      _1.primary_flg = true
     end
+
+    tag = tn.tag
+    if tag
+      tag.update!(tag_name_id: tn.id) if tag.tag_name_id != tn.id
+      return tag
+    end
+
+    tag = Tag.create!(tag_name: tn, category:)
+    tn.update!(tag:)
+
+    tag
   rescue ActiveRecord::RecordNotUnique
     retry
   end

backend/app/models/tag_name.rb

@@ -1,5 +1,5 @@
 class TagName < ApplicationRecord
-  has_one :tag
+  belongs_to :tag, optional: true
   has_one :wiki_page
 
   belongs_to :canonical, class_name: 'TagName', optional: true
@@ -21,6 +21,12 @@ class TagName < ApplicationRecord
     names.map { |name| tns[name]&.canonical&.name || name }.uniq
   end
 
+  def self.generate_name locale, tag, name
+    # TODO: 言語ごとの自動命名ロジック完成したら書く．
+
+    "Tag_##{ tag.id }"
+  end
+
   private
 
   def canonical_must_be_canonical

backend/app/services/post_creator.rb

@@ -9,7 +9,7 @@ class PostCreator
     @field_warnings = { }
   end
 
-  def create!
+  def create!(locale)
     thumbnail_attachment = prepare_thumbnail_attachment
     post = Post.new(title: @attributes[:title].presence,
                     url: @attributes[:url],
@@ -25,7 +25,7 @@ class PostCreator
       post_tags = planned_post_tags
       sections = planned_sections
       TagVersioning.record_tag_snapshots!(snapshot_tags, created_by_user: @actor)
-      post.video_ms = planned_video_ms
+      post.video_ms = planned_video_ms(locale)
       post.save!
       sync_post_tags!(post, post_tags, sections)
       sync_parent_posts!(post, planned_parent_post_ids)
@@ -53,15 +53,15 @@ class PostCreator
 
   def planned_parent_post_ids = planned_create_attributes[:normalised_parent_post_ids]
 
-  def planned_video_ms
-    planned_create_attributes[:video_ms]
+  def planned_video_ms locale
+    planned_create_attributes(locale)[:video_ms]
   end
 
-  def planned_create_attributes
+  def planned_create_attributes locale
     @planned_create_attributes ||= begin
       if @attributes.key?(:snapshot_tag_specs)
-        snapshot_tags = materialise_tags(@attributes[:snapshot_tag_specs] || [])
-        post_tags = materialise_tags(@attributes[:post_tag_specs] || [])
+        snapshot_tags = materialise_tags(locale, @attributes[:snapshot_tag_specs] || [])
+        post_tags = materialise_tags(locale, @attributes[:post_tag_specs] || [])
         {
             snapshot_tags: snapshot_tags,
             post_tags: post_tags,
@@ -92,13 +92,13 @@ class PostCreator
         video_ms: plan[:video_ms] }
   end
 
-  def materialise_tags specs
+  def materialise_tags locale, specs
     Array(specs).each_with_object({ }) do |spec, tags|
       name = spec[:name] || spec['name']
       category = spec[:category] || spec['category']
       next if name.blank? || category.blank?
 
-      tag = Tag.find_or_create_by_tag_name!(name, category:)
+      tag = Tag.find_or_create_by_tag_name!(locale, name, category:)
       tag.update!(category:) if tag.category.to_sym != category.to_sym
       tags[name] ||= tag
     end.values

backend/db/migrate/20260922000000_create_languages.rb

@@ -0,0 +1,20 @@
+class CreateLanguages < ActiveRecord::Migration[8.0]
+  def up
+    create_table :languages, id: { type: :string, limit: 16 }, primary_key: :code do |t|
+      t.string :name, null: false
+      t.datetime :deprecated_at, index: true
+      t.datetime :created_at, null: false
+    end
+
+    execute <<~SQL
+      INSERT INTO
+        languages(code, name, created_at)
+      VALUES
+        ('ja', '日本語', #{ connection.quote Time.current })
+    SQL
+  end
+
+  def down
+    drop_table :languages
+  end
+end

backend/db/migrate/20260922010000_create_scripts.rb

@@ -0,0 +1,20 @@
+class CreateScripts < ActiveRecord::Migration[8.0]
+  def up
+    create_table :scripts, id: { type: 'CHAR(4)' }, primary_key: :code do |t|
+      t.string :name, null: false
+      t.datetime :deprecated_at, index: true
+      t.datetime :created_at, null: false
+    end
+
+    execute <<~SQL
+      INSERT INTO
+        scripts(code, name, created_at)
+      VALUES
+        ('Jpan', '漢字および仮名文字', #{ connection.quote Time.current })
+    SQL
+  end
+
+  def down
+    drop_table :scripts
+  end
+end

backend/db/migrate/20260922020000_create_locales.rb

@@ -0,0 +1,25 @@
+class CreateLocales < ActiveRecord::Migration[8.0]
+  def up
+    create_table :locales, id: { type: :string, limit: 32 }, primary_key: :code do |t|
+      t.string :language_code, limit: 16, null: false, index: true
+      t.column :script_code, 'CHAR(4)', null: false
+      t.string :name, null: false
+      t.datetime :deprecated_at, index: true
+      t.datetime :created_at, null: false
+
+      t.foreign_key :languages, column: :language_code, primary_key: :code
+      t.foreign_key :scripts, column: :script_code, primary_key: :code
+    end
+
+    execute <<~SQL
+      INSERT INTO
+        locales(code, language_code, script_code, name, created_at)
+      VALUES
+        ('ja', 'ja', 'Jpan', '日本語', #{ connection.quote Time.current })
+    SQL
+  end
+
+  def down
+    drop_table :locales
+  end
+end

backend/db/migrate/20260922030000_add_columns_to_tag_names.rb

@@ -0,0 +1,59 @@
+class AddColumnsToTagNames < ActiveRecord::Migration[8.0]
+  def up
+    add_reference :tag_names, :tag, after: :id, foreign_key: true
+    add_column :tag_names, :language_code, :string,
+               limit: 16, null: false, after: :tag_id, default: 'ja'
+    add_column :tag_names, :script_code, 'CHAR(4)',
+               null: false, after: :name, default: 'Jpan'
+    add_column :tag_names, :primary_flg, :boolean,
+               null: false, after: :script_code, default: true
+
+    add_foreign_key :tag_names, :languages, column: :language_code, primary_key: :code
+    add_foreign_key :tag_names, :scripts, column: :script_code, primary_key: :code
+
+    remove_index :tag_names, :name
+    add_index :tag_names, [:language_code, :name], unique: true
+
+    change_column_default :tag_names, :language_code, from: 'ja', to: nil
+    change_column_default :tag_names, :script_code, from: 'Jpan', to: nil
+
+    execute <<~SQL
+      UPDATE
+        tag_names tn
+        LEFT JOIN
+          tags AS t
+          ON
+            t.tag_name_id = COALESCE(tn.canonical_id, tn.id)
+      SET
+        tn.tag_id = t.id
+      , tn.primary_flg = CASE
+                         WHEN tn.canonical_id IS NULL THEN
+                           1
+                         ELSE
+                           0
+                         END
+    SQL
+
+    change_column_default :tag_names, :primary_flg, from: true, to: nil
+
+    add_column :tag_names, :primary_tag_id, :bigint,
+               as: 'CASE WHEN primary_flg THEN tag_id ELSE NULL END'
+    add_index :tag_names, [:primary_tag_id, :language_code], unique: true
+  end
+
+  def down
+    remove_index :tag_names, [:primary_tag_id, :language_code]
+    remove_column :tag_names, :primary_tag_id
+
+    remove_foreign_key :tag_names, column: :language_code
+    remove_foreign_key :tag_names, column: :script_code
+
+    remove_index :tag_names, [:language_code, :name]
+    add_index :tag_names, :name, unique: true
+
+    remove_column :tag_names, :primary_flg
+    remove_column :tag_names, :script_code
+    remove_column :tag_names, :language_code
+    remove_reference :tag_names, :tag, foreign_key: true
+  end
+end

backend/lib/tasks/sync_nico.rake

@@ -124,7 +124,7 @@ namespace :nico do
 
       datum['tags'].each do |raw|
         name = TagNameSanitisationRule.sanitise("nico:#{ raw }")
-        tag = Tag.find_or_create_by_tag_name!(name, category: :nico)
+        tag = Tag.find_or_create_by_tag_name!(Locale.nipponese, name, category: :nico)
 
         event_type = tag.nico_tag_versions.exists? ? :update : :create
         NicoTagVersionRecorder.record!(tag:, event_type:, created_by_user: nil)