introduced ability to auto detect CNAME of custom domain

.haml-lint_todo.yml

@@ -31,6 +31,8 @@ linters:
       - "app/views/admin/conferences/_targets.html.haml"
       - "app/views/admin/conferences/_todo_list.html.haml"
       - "app/views/admin/conferences/_top_submitter.html.haml"
+      - "app/views/admin/conferences/attach_custom_domain.html.haml"
+      - "app/views/admin/conferences/custom_domain.html.haml"
       - "app/views/admin/conferences/edit.html.haml"
       - "app/views/admin/conferences/index.html.haml"
       - "app/views/admin/conferences/new.html.haml"

app/controllers/admin/conferences_controller.rb

@@ -4,7 +4,9 @@ module Admin
     load_resource :program, through: :conference, singleton: true, except: :index
     load_resource :user, only: [:remove_user]
 
-    def custom_domain; end
+    def custom_domain
+      redirect_to attach_custom_domain_admin_conference_path(@conference.short_title) unless @conference.custom_domain.present?
+    end
 
     def attach_custom_domain; end
 

app/models/conference.rb

@@ -92,6 +92,28 @@ class Conference < ActiveRecord::Base
     user.present? && registrations.where(user_id: user.id).count > 0
   end
 
+  ##
+  # Checks if domain correctly points to the hosted version
+  # This feature is enabled only if ENV['OSEM_HOSTNAME'] is present
+  #
+  # ====Returns
+  # * +true+ -> If the custom domain has a CNAME record for the hosted version
+  # * +false+ -> If the custom domain does not have a CNAME record for the hosted version
+  def check_custom_domain
+    require 'resolv'
+
+    unless ENV['OSEM_HOSTNAME'].nil?
+      cname_record = Resolv::DNS.new.getresources(custom_domain, Resolv::DNS::Resource::IN::CNAME)
+      if cname_record.present?
+        return ENV['OSEM_HOSTNAME'] == Resolv::DNS.new.getresources(custom_domain, Resolv::DNS::Resource::IN::CNAME).first.name.to_s
+      else
+        return false
+      end
+    end
+
+    '--feature disabled--'
+  end
+
   ##
   # Delete all EventSchedules that are not in the hours range
   # After the conference has been successfully updated

app/views/admin/conferences/custom_domain.html.haml

@@ -17,7 +17,14 @@
           %td
             = @conference.custom_domain
           %td
-            = ""
+            - ck_domain = @conference.check_custom_domain
+            - if ck_domain == true
+              %span.glyphicon.glyphicon-ok
+            - elsif ck_domain == false
+              %span.glyphicon.glyphicon-remove
+            - else
+              %i
+                = ck_domain
           %td
             .btn-group
               = link_to 'Edit', attach_custom_domain_admin_conference_path(@conference.short_title),