Add: #406 ユーザーのカスタムCSS (#825)

* Add: #406 ユーザーのカスタムCSS

* Fix lint

* Fix lint

* カスタムCSSの保存先を変更

* キャッシュを考慮して別URLに変更

app/models/concerns/user/has_settings.rb

@@ -283,6 +283,10 @@ module User::HasSettings
     settings['web.hide_favourite_menu']
   end
 
+  def setting_use_custom_css
+    settings['web.use_custom_css']
+  end
+
   def allows_report_emails?
     settings['notification_emails.report']
   end

app/models/custom_css.rb

@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+#
+# == Schema Information
+#
+# Table name: custom_csses
+#
+#  id         :bigint(8)        not null, primary key
+#  user_id    :bigint(8)        not null
+#  css        :string           default(""), not null
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#
+class CustomCss < ApplicationRecord
+  belongs_to :user
+end

app/models/user.rb

@@ -101,6 +101,8 @@ class User < ApplicationRecord
   accepts_nested_attributes_for :invite_request, reject_if: ->(attributes) { attributes['text'].blank? && !Setting.require_invite_text }
   validates :invite_request, presence: true, on: :create, if: :invite_text_required?
 
+  has_one :custom_css, inverse_of: :user, dependent: :destroy
+
   validates :email, presence: true, email_address: true
 
   validates_with UserEmailValidator, if: -> { ENV['EMAIL_DOMAIN_LISTS_APPLY_AFTER_CONFIRMATION'] == 'true' || !confirmed? }
@@ -227,6 +229,22 @@ class User < ApplicationRecord
     prepare_returning_user!
   end
 
+  def disable_css
+    false
+  end
+
+  def custom_css_text
+    custom_css&.css.to_s
+  end
+
+  def custom_css_text=(val)
+    if custom_css.present?
+      custom_css.update!(css: val)
+    else
+      CustomCss.create!(user: self, css: val)
+    end
+  end
+
   def pending?
     !approved?
   end

app/models/user_settings.rb

@@ -55,6 +55,7 @@ class UserSettings
     setting :use_blurhash, default: true
     setting :use_pending_items, default: false
     setting :use_system_font, default: false
+    setting :use_custom_css, default: false
     setting :content_font_size, default: 'medium', in: %w(medium large x_large xx_large)
     setting :bookmark_category_needed, default: false
     setting :disable_swiping, default: false

app/models/user_settings/setting.rb

@@ -63,6 +63,8 @@ class UserSettings::Setting
     case default_value
     when TrueClass, FalseClass
       ActiveModel::Type::Boolean.new
+    when Integer
+      ActiveModel::Type::Integer.new
     else
       ActiveModel::Type::String.new
     end