2FA controller cleanup (#2296)

* Add spec coverage for settings/two_factor_auth area

* extract setup method for qr code

* Move otp required check to before action

* Merge method only used once

* Remove duplicate view

* Consolidate creation of @codes for backup

* Move settings/2fq#recovery_codes to settings/recovery_codes#create

* Rename settings/two_factor_auth#disable to #destroy

* Add coverage for the otp required path on 2fa#show

* Clean up the recovery codes list styles

* Move settings/two_factor_auth to settings/two_factor_authentication

* Reorganize the settings two factor auth area

Updated to use a flow like:

- settings/two_factor_authentication goes to a #show view which has a button
  either enable or disable 2fa on the account
- the disable button turns off the otp requirement for the user
- the enable button cycles the user secret and redirects to a confirmation page
- the confirmation page is a #new view which shows the QR code for user
- that page posts to #create which verifies the code, and creates the recovery
  codes
- that create action shares a view with a recovery codes controller which can be
  used separately to reset codes if needed

app/controllers/settings/two_factor_authentication/confirmations_controller.rb

@@ -0,0 +1,43 @@
+# frozen_string_literal: true
+
+module Settings
+  module TwoFactorAuthentication
+    class ConfirmationsController < ApplicationController
+      layout 'admin'
+
+      before_action :authenticate_user!
+
+      def new
+        prepare_two_factor_form
+      end
+
+      def create
+        if current_user.validate_and_consume_otp!(confirmation_params[:code])
+          flash[:notice] = I18n.t('two_factor_authentication.enabled_success')
+
+          current_user.otp_required_for_login = true
+          @recovery_codes = current_user.generate_otp_backup_codes!
+          current_user.save!
+
+          render 'settings/two_factor_authentication/recovery_codes/index'
+        else
+          flash.now[:alert] = I18n.t('two_factor_authentication.wrong_code')
+          prepare_two_factor_form
+          render :new
+        end
+      end
+
+      private
+
+      def confirmation_params
+        params.require(:form_two_factor_confirmation).permit(:code)
+      end
+
+      def prepare_two_factor_form
+        @confirmation = Form::TwoFactorConfirmation.new
+        @provision_url = current_user.otp_provisioning_uri(current_user.email, issuer: Rails.configuration.x.local_domain)
+        @qrcode = RQRCode::QRCode.new(@provision_url)
+      end
+    end
+  end
+end

app/controllers/settings/two_factor_authentication/recovery_codes_controller.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+module Settings
+  module TwoFactorAuthentication
+    class RecoveryCodesController < ApplicationController
+      layout 'admin'
+
+      before_action :authenticate_user!
+
+      def create
+        @recovery_codes = current_user.generate_otp_backup_codes!
+        current_user.save!
+        flash[:notice] = I18n.t('two_factor_authentication.recovery_codes_regenerated')
+        render :index
+      end
+    end
+  end
+end

app/controllers/settings/two_factor_authentications_controller.rb

@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+module Settings
+  class TwoFactorAuthenticationsController < ApplicationController
+    layout 'admin'
+
+    before_action :authenticate_user!
+    before_action :verify_otp_required, only: [:create]
+
+    def show; end
+
+    def create
+      current_user.otp_secret = User.generate_otp_secret(32)
+      current_user.save!
+      redirect_to new_settings_two_factor_authentication_confirmation_path
+    end
+
+    def destroy
+      current_user.otp_required_for_login = false
+      current_user.save!
+      redirect_to settings_two_factor_authentication_path
+    end
+
+    private
+
+    def verify_otp_required
+      redirect_to settings_two_factor_authentication_path if current_user.otp_required_for_login?
+    end
+  end
+end

app/controllers/settings/two_factor_auths_controller.rb

@@ -1,56 +0,0 @@
-# frozen_string_literal: true
-
-class Settings::TwoFactorAuthsController < ApplicationController
-  layout 'admin'
-
-  before_action :authenticate_user!
-
-  def show; end
-
-  def new
-    redirect_to settings_two_factor_auth_path if current_user.otp_required_for_login
-
-    @confirmation = Form::TwoFactorConfirmation.new
-    current_user.otp_secret = User.generate_otp_secret(32)
-    current_user.save!
-    set_qr_code
-  end
-
-  def create
-    if current_user.validate_and_consume_otp!(confirmation_params[:code])
-      current_user.otp_required_for_login = true
-      @codes = current_user.generate_otp_backup_codes!
-      current_user.save!
-      flash[:notice] = I18n.t('two_factor_auth.enabled_success')
-    else
-      @confirmation = Form::TwoFactorConfirmation.new
-      set_qr_code
-      flash.now[:alert] = I18n.t('two_factor_auth.wrong_code')
-      render :new
-    end
-  end
-
-  def recovery_codes
-    @codes = current_user.generate_otp_backup_codes!
-    current_user.save!
-    flash[:notice] = I18n.t('two_factor_auth.recovery_codes_regenerated')
-  end
-
-  def disable
-    current_user.otp_required_for_login = false
-    current_user.save!
-
-    redirect_to settings_two_factor_auth_path
-  end
-
-  private
-
-  def set_qr_code
-    @provision_url = current_user.otp_provisioning_uri(current_user.email, issuer: Rails.configuration.x.local_domain)
-    @qrcode        = RQRCode::QRCode.new(@provision_url)
-  end
-
-  def confirmation_params
-    params.require(:form_two_factor_confirmation).permit(:code)
-  end
-end