feat: タグ補完から 0 件を除外（#109） (#245)

#109

#109

Co-authored-by: miteruzo <miteruzo@naver.com>
Reviewed-on: #245

backend/app/controllers/application_controller.rb

@@ -11,4 +11,15 @@ class ApplicationController < ActionController::API
     code = request.headers['X-Transfer-Code'] || request.headers['HTTP_X_TRANSFER_CODE']
     @current_user = User.find_by(inheritance_code: code)
   end
+
+  def bool? key, default: false
+    return default if params[key].nil?
+
+    s = params[key].to_s.strip.downcase
+    if default
+      !(s.in?(['0', 'false', 'off', 'no']))
+    else
+      s.in?(['', '1', 'true', 'on', 'yes'])
+    end
+  end
 end

backend/app/controllers/tags_controller.rb

@@ -16,7 +16,8 @@ class TagsController < ApplicationController
     q = params[:q].to_s.strip
     return render json: [] if q.blank?
 
-    with_nico = !(params[:nico].to_s.strip.downcase.in?(['0', 'false', 'off', 'no']))
+    with_nico = bool?(:nico, default: true)
+    present_only = bool?(:present, default: true)
 
     alias_rows =
         TagName
@@ -33,6 +34,7 @@ class TagsController < ApplicationController
     end
 
     base = Tag.joins(:tag_name).includes(:tag_name)
+    base = base.where('tags.post_count > 0') if present_only
 
     canonical_hit =
         base