Fix `Style/GuardClause` cop in app/controllers (#28420)

.rubocop_todo.yml

@@ -121,10 +121,6 @@ Style/GlobalStdStream:
 # Configuration parameters: MinBodyLength, AllowConsecutiveConditionals.
 Style/GuardClause:
   Exclude:
-    - 'app/controllers/admin/confirmations_controller.rb'
-    - 'app/controllers/auth/confirmations_controller.rb'
-    - 'app/controllers/auth/passwords_controller.rb'
-    - 'app/controllers/settings/two_factor_authentication/webauthn_credentials_controller.rb'
     - 'app/lib/activitypub/activity/block.rb'
     - 'app/lib/request.rb'
     - 'app/lib/request_pool.rb'

app/controllers/admin/confirmations_controller.rb

@@ -3,7 +3,7 @@
 module Admin
   class ConfirmationsController < BaseController
     before_action :set_user
-    before_action :check_confirmation, only: [:resend]
+    before_action :redirect_confirmed_user, only: [:resend], if: :user_confirmed?
 
     def create
       authorize @user, :confirm?
@@ -25,11 +25,13 @@ module Admin
 
     private
 
-    def check_confirmation
-      if @user.confirmed?
-        flash[:error] = I18n.t('admin.accounts.resend_confirmation.already_confirmed')
-        redirect_to admin_accounts_path
-      end
+    def redirect_confirmed_user
+      flash[:error] = I18n.t('admin.accounts.resend_confirmation.already_confirmed')
+      redirect_to admin_accounts_path
+    end
+
+    def user_confirmed?
+      @user.confirmed?
     end
   end
 end

app/controllers/auth/confirmations_controller.rb

@@ -7,7 +7,7 @@ class Auth::ConfirmationsController < Devise::ConfirmationsController
 
   before_action :set_body_classes
   before_action :set_confirmation_user!, only: [:show, :confirm_captcha]
-  before_action :require_unconfirmed!
+  before_action :redirect_confirmed_user, if: :signed_in_confirmed_user?
 
   before_action :extend_csp_for_captcha!, only: [:show, :confirm_captcha]
   before_action :require_captcha_if_needed!, only: [:show]
@@ -65,10 +65,12 @@ class Auth::ConfirmationsController < Devise::ConfirmationsController
     @confirmation_user.nil? || @confirmation_user.confirmed?
   end
 
-  def require_unconfirmed!
-    if user_signed_in? && current_user.confirmed? && current_user.unconfirmed_email.blank?
-      redirect_to(current_user.approved? ? root_path : edit_user_registration_path)
-    end
+  def redirect_confirmed_user
+    redirect_to(current_user.approved? ? root_path : edit_user_registration_path)
+  end
+
+  def signed_in_confirmed_user?
+    user_signed_in? && current_user.confirmed? && current_user.unconfirmed_email.blank?
   end
 
   def set_body_classes

app/controllers/auth/passwords_controller.rb

@@ -2,7 +2,7 @@
 
 class Auth::PasswordsController < Devise::PasswordsController
   skip_before_action :check_self_destruct!
-  before_action :check_validity_of_reset_password_token, only: :edit
+  before_action :redirect_invalid_reset_token, only: :edit, unless: :reset_password_token_is_valid?
   before_action :set_body_classes
 
   layout 'auth'
@@ -19,11 +19,9 @@ class Auth::PasswordsController < Devise::PasswordsController
 
   private
 
-  def check_validity_of_reset_password_token
-    unless reset_password_token_is_valid?
-      flash[:error] = I18n.t('auth.invalid_reset_password_token')
-      redirect_to new_password_path(resource_name)
-    end
+  def redirect_invalid_reset_token
+    flash[:error] = I18n.t('auth.invalid_reset_password_token')
+    redirect_to new_password_path(resource_name)
   end
 
   def set_body_classes

app/controllers/settings/two_factor_authentication/webauthn_credentials_controller.rb

@@ -6,8 +6,8 @@ module Settings
       skip_before_action :check_self_destruct!
       skip_before_action :require_functional!
 
-      before_action :require_otp_enabled
-      before_action :require_webauthn_enabled, only: [:index, :destroy]
+      before_action :redirect_invalid_otp, unless: -> { current_user.otp_enabled? }
+      before_action :redirect_invalid_webauthn, only: [:index, :destroy], unless: -> { current_user.webauthn_enabled? }
 
       def index; end
       def new; end
@@ -85,18 +85,14 @@ module Settings
 
       private
 
-      def require_otp_enabled
-        unless current_user.otp_enabled?
-          flash[:error] = t('webauthn_credentials.otp_required')
-          redirect_to settings_two_factor_authentication_methods_path
-        end
+      def redirect_invalid_otp
+        flash[:error] = t('webauthn_credentials.otp_required')
+        redirect_to settings_two_factor_authentication_methods_path
       end
 
-      def require_webauthn_enabled
-        unless current_user.webauthn_enabled?
-          flash[:error] = t('webauthn_credentials.not_enabled')
-          redirect_to settings_two_factor_authentication_methods_path
-        end
+      def redirect_invalid_webauthn
+        flash[:error] = t('webauthn_credentials.not_enabled')
+        redirect_to settings_two_factor_authentication_methods_path
       end
     end
   end