#318

backend/app/controllers/tags_controller.rb

@@ -66,7 +66,7 @@ class TagsController < ApplicationController
             .offset(offset)
             .to_a
 
-    render json: { tags: TagRepr.base(tags), count: q.size }
+    render json: { tags: TagRepr.many(tags), count: q.size }
   end
 
   def with_depth
@@ -209,6 +209,46 @@ class TagsController < ApplicationController
     render json: build_tag_children(tag)
   end
 
+  def update_all
+    return head :unauthorized unless current_user
+    return head :forbidden unless current_user.gte_member?
+
+    tag = Tag.find_by(id: params[:id])
+    return head :not_found unless tag
+
+    name = params[:name].to_s.strip
+    category = params[:category].to_s.strip
+    return head :unprocessable_entity if name.blank? || category.blank?
+
+    if tag.nico? != (category == 'nico')
+      return render json: { error: 'ニコタグのカテゴリ変更はできません．' },
+                    status: :unprocessable_entity
+    end
+
+    alias_names = params[:aliases].to_s.split.uniq
+    parent_names = params[:parent_tags].to_s.split.uniq
+
+    ApplicationRecord.transaction do
+      TagVersioning.ensure_snapshot!(tag, created_by_user: current_user)
+
+      old_name = tag.name
+
+      tag.update!(category:)
+      tag.tag_name.update!(name:)
+
+      alias_names << old_name if name != old_name
+      alias_names.delete(name)
+
+      update_aliases!(tag, alias_names)
+      update_parent_tags!(tag, parent_names)
+
+      tag.reload
+      record_tag_version!(tag, event_type: :update, created_by_user: current_user)
+    end
+
+    render json: TagRepr.base(tag.reload)
+  end
+
   def update
     return head :unauthorized unless current_user
     return head :forbidden unless current_user.gte_member?
@@ -237,7 +277,7 @@ class TagsController < ApplicationController
 
   private
 
-  def build_tag_children(tag)
+  def build_tag_children tag
     material = tag.materials.first
     file = nil
     content_type = nil
@@ -251,11 +291,43 @@ class TagsController < ApplicationController
         material: material.as_json&.merge(file:, content_type:))
   end
 
-  def record_tag_version!(tag, event_type:, created_by_user:)
+  def record_tag_version! tag, event_type:, created_by_user:
     if tag.nico?
       NicoTagVersionRecorder.record!(tag:, event_type:, created_by_user:)
     else
       TagVersionRecorder.record!(tag:, event_type:, created_by_user:)
     end
   end
+
+  def update_aliases! tag, alias_names
+    current_aliases = tag.tag_name.aliases.to_a
+
+    current_aliases.each do |alias_tag_name|
+      next if alias_names.include?(alias_tag_name.name)
+
+      alias_tag_name.update!(canonical: nil)
+    end
+
+    alias_names.each do |alias_name|
+      alias_tag_name = TagName.find_undiscard_or_create_by!(name: alias_name)
+      alias_tag_name.update!(canonical: tag.tag_name)
+    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)
+
+    TagVersioning.record_tag_snapshots!((tag.parents.to_a + parent_tags).uniq,
+                                        created_by_user: current_user)
+
+    tag.tag_implications.destroy_all
+
+    parent_tags.each do |parent_tag|
+      next if parent_tag == tag
+
+      TagImplication.create!(tag:, parent_tag:)
+    end
+  end
 end

backend/app/representations/tag_repr.rb

@@ -8,10 +8,9 @@ module TagRepr
   module_function
 
   def base tag
-    tag.as_json(BASE)
+    tag.as_json(BASE).merge(aliases: tag.snapshot_aliases,
+                            parents: tag.parents.map { _1.as_json(BASE) })
   end
 
-  def many tags
-    tags.map { |t| base(t) }
-  end
+  def many(tags) = tags.map { |t| base(t) }
 end

backend/config/routes.rb

@@ -6,7 +6,7 @@ Rails.application.routes.draw do
     delete ':child_id', action: :destroy
   end
 
-  resources :tags, only: [:index, :show, :update] do
+  resources :tags, only: [:index, :show] do
     collection do
       get :autocomplete
       get :'with-depth', action: :with_depth
@@ -19,6 +19,9 @@ Rails.application.routes.draw do
     end
 
     member do
+      put '', action: :update_all
+      patch '', action: :update
+
       get :deerjikists
     end
   end