From b83fc6369a85075d22dbf0869145933eb6e18174 Mon Sep 17 00:00:00 2001
From: miteruzo <miteruzo@naver.com>
Date: Wed, 9 Jul 2025 23:58:03 +0900
Subject: [PATCH] #60

---
 .../app/controllers/application_controller.rb |  4 +-
 backend/app/controllers/posts_controller.rb   | 50 +++++++++++--------
 backend/app/models/tag.rb                     | 12 +++++
 backend/lib/tasks/sync_nico.rake              | 18 ++-----
 4 files changed, 46 insertions(+), 38 deletions(-)

diff --git a/backend/app/controllers/application_controller.rb b/backend/app/controllers/application_controller.rb
index dbe334b..7c580b3 100644
--- a/backend/app/controllers/application_controller.rb
+++ b/backend/app/controllers/application_controller.rb
@@ -9,8 +9,6 @@ class ApplicationController < ActionController::API
 
   def authenticate_user
     code = request.headers['X-Transfer-Code'] || request.headers['HTTP_X_TRANSFER_CODE']
-    @current_user = User.find_by inheritance_code: code
-      Rails.logger.info("X-Transfer-Code: #{request.headers['X-Transfer-Code']}")
-  Rails.logger.info("current_user: #{@current_user&.id}")
+    @current_user = User.find_by(inheritance_code: code)
   end
 end
diff --git a/backend/app/controllers/posts_controller.rb b/backend/app/controllers/posts_controller.rb
index 82af00b..2deaf0f 100644
--- a/backend/app/controllers/posts_controller.rb
+++ b/backend/app/controllers/posts_controller.rb
@@ -62,19 +62,12 @@ class PostsController < ApplicationController
     url = params[:url]
     thumbnail = params[:thumbnail]
     tag_names = params[:tags].to_s.split(' ')
-    if tag_names.size < 20 && tag_names.none?('タグ希望')
-      tag_names << 'タグ希望'
-    end
 
     post = Post.new(title:, url:, thumbnail_base: '', uploaded_user: current_user)
     post.thumbnail.attach(thumbnail)
     if post.save
       post.resized_thumbnail!
-      # TODO: 接頭辞に応じて category 変へる
-      post.tags = tag_names.map { |name| Tag.find_or_initialize_by(name:) { |tag|
-        tag.category = 'general'
-      } }
-
+      post.tags = normalise_tags(tags_names)
       render json: post.as_json(include: { tags: { only: [:id, :name, :category] } }),
              status: :created
     else
@@ -103,22 +96,12 @@ class PostsController < ApplicationController
 
     title = params[:title]
     tag_names = params[:tags].to_s.split(' ')
-    if tag_names.size < 20 && tag_names.none?('タグ希望')
-      tag_names << 'タグ希望'
-    end
 
     post = Post.find(params[:id].to_i)
-    tags = post.tags.where(category: 'nico').to_a
-    tag_names.each do |name|
-      # TODO: 接頭辞に応じて category 変へる
-      tags << Tag.find_or_initialize_by(name:) { |tag|
-        tag.category = 'general'
-      }
-    end
+    tags = post.tags.where(category: 'nico').to_a + normalise_tags(tag_names)
     if post.update(title:, tags:)
-      render({ json:    (post
-                         .as_json(include: { tags: { only: [:id, :name, :category] } })),
-               status:  :created })
+      render json: post.as_json(include: { tags: { only: [:id, :name, :category] } }),
+             status: :created
     else
       render json: post.errors, status: :unprocessable_entity
     end
@@ -130,8 +113,16 @@ class PostsController < ApplicationController
 
   private
 
+  CATEGORY_PREFIXES = {
+      'gen:'  => 'general',
+      'djk:'  => 'deerjikist',
+      'meme:' => 'meme',
+      'chr:'  => 'character',
+      'mtr:'  => 'material',
+      'meta:' => 'meta' }.freeze
+
   def filtered_posts
-    tag_names = params[:tags]&.split(?\ )
+    tag_names = params[:tags]&.split(' ')
     match_type = params[:match]
     tag_names.present? ? filter_posts_by_tags(tag_names, match_type) : Post.all
   end
@@ -147,4 +138,19 @@ class PostsController < ApplicationController
     end
     posts.distinct
   end
+
+  def normalise_tags tag_names
+    tags = tag_names.map do |name|
+      pf, cat = CATEGORY_PREFIXES.find { |p, _| name.start_with?(p) } || ['', nil]
+      name.delete_prefix!(pf)
+      Tag.find_or_initialize_by(name:).tap do |tag|
+        if cat && tag.category != cat
+          tag.category = cat
+          tag.save!
+        end
+      end
+    end
+    tags << Tag.tagme if tags.size < 20 && tags.none?(Tag.tagme)
+    tags.uniq
+  end
 end
diff --git a/backend/app/models/tag.rb b/backend/app/models/tag.rb
index 3b3c6a3..f848d58 100644
--- a/backend/app/models/tag.rb
+++ b/backend/app/models/tag.rb
@@ -19,6 +19,18 @@ class Tag < ApplicationRecord
 
   scope :nico_tags, -> { where category: :nico }
 
+  def self.tagme
+    @tagme ||= Tag.find_or_initialize_by(name: 'タグ希望') do |tag|
+      tag.category = 'meta'
+    end
+  end
+
+  def self.bot
+    @bot ||= Tag.find_or_initialize_by(name: 'bot操作') do |tag|
+      tag.category = 'meta'
+    end
+  end
+
   private
 
   def nico_tag_name_must_start_with_nico
diff --git a/backend/lib/tasks/sync_nico.rake b/backend/lib/tasks/sync_nico.rake
index 8fa3533..1aadd48 100644
--- a/backend/lib/tasks/sync_nico.rake
+++ b/backend/lib/tasks/sync_nico.rake
@@ -45,20 +45,12 @@ namespace :nico do
         if current_tags != new_tags
           post.tags.destroy(post.tags.where(name: current_tags))
           new_tags.each do |name|
-            post.tags << Tag.find_or_initialize_by(name:, category: 'nico')
+            post.tags << Tag.find_or_initialize_by(name:) do |tag|
+              tag.category = 'nico'
+            end
           end
-          if post.tags.size < 20
-            name = 'タグ希望'
-            post.tags.destroy(post.tags.find_by(name:) || [])
-            post.tags << Tag.find_or_initialize_by(name:) { |tag|
-              tag.category = 'meta'
-            }
-          end
-          name = 'bot操作'
-          post.tags.destroy(post.tags.find_by(name:) || [])
-          post.tags << Tag.find_or_initialize_by(name:) { |tag|
-            tag.category = 'meta'
-          }
+          post.tags << Tag.tagme if post.tags.size < 20 && post.tags.none?(Tag.tagme)
+          post.tags << Tag.bot if post.tags.none?(Tag.bot)
         end
       end
     end