Feature: Add new notification settings for user (#569)

Added new notification settings API for user 

Co-authored-by: Sojan Jose <sojan@pepalo.com>

app/controllers/api/v1/callbacks_controller.rb

@@ -44,7 +44,7 @@ class Api::V1::CallbacksController < Api::BaseController
   end
 
   def update_fb_page(fb_page_id, access_token)
-    get_fb_page(fb_page_id)&.update_attributes!(
+    get_fb_page(fb_page_id)&.update!(
       user_access_token: @user_access_token, page_access_token: access_token
     )
   end

app/controllers/api/v1/user/notification_settings_controller.rb

@@ -0,0 +1,29 @@
+class Api::V1::User::NotificationSettingsController < Api::BaseController
+  before_action :set_user, :load_notification_setting
+
+  def show; end
+
+  def update
+    update_flags
+    @notification_setting.save!
+    render action: 'show'
+  end
+
+  private
+
+  def set_user
+    @user = current_user
+  end
+
+  def load_notification_setting
+    @notification_setting = @user.notification_settings.find_by(account_id: current_account.id)
+  end
+
+  def notification_setting_params
+    params.require(:notification_settings).permit(selected_email_flags: [])
+  end
+
+  def update_flags
+    @notification_setting.selected_email_flags = notification_setting_params[:selected_email_flags]
+  end
+end