Fixes #15818 - Show which capsule a host is registered through

This displays the system that a host is registered through in a
'registered_through' field that is searchable and displayed in the
content host details page. If the host is registered to the main
katello server, the field will display that.

app/controllers/katello/api/rhsm/candlepin_proxies_controller.rb

@@ -198,6 +198,8 @@ def consumer_create
       sync_task(::Actions::Katello::Host::Register, host, System.new, rhsm_params, content_view_environment)
       host.reload
 
+      update_host_registered_through(host, request.headers)
+
       render :json => Resources::Candlepin::Consumer.get(host.subscription_facet.uuid)
     end
 
@@ -226,6 +228,8 @@ def consumer_activate
                                     activation_keys.first.organization, rhsm_params)
 
       sync_task(::Actions::Katello::Host::Register, host, System.new, rhsm_params, nil, activation_keys)
+
+      update_host_registered_through(host, request.headers)
       host.reload
 
       render :json => Resources::Candlepin::Consumer.get(host.subscription_facet.uuid)
@@ -249,6 +253,7 @@ def facts
       User.as_anonymous_admin do
         sync_task(::Actions::Katello::Host::Update, @host, rhsm_params)
         Katello::Host::SubscriptionFacet.update_facts(@host, rhsm_params[:facts]) unless rhsm_params[:facts].nil?
+        update_host_registered_through(@host, request.headers)
       end
       render :json => {:content => _("Facts successfully updated.")}, :status => 200
     end
@@ -259,6 +264,12 @@ def serials
       render :json => Katello::Resources::Candlepin::Consumer.serials(@host.subscription_facet.uuid)
     end
 
+    def get_parent_host(headers)
+      hostnames = headers["HTTP_X_FORWARDED_SERVER"]
+      host = hostnames.split(",")[0] if hostnames
+      host || Facter.value(:fqdn) || SETTINGS[:fqdn]
+    end
+
     private
 
     def disable_strong_params
@@ -436,6 +447,11 @@ def client_authorized?
       authorized
     end
 
+    def update_host_registered_through(host, headers)
+      parent_host = get_parent_host(headers)
+      host.subscription_facet.update_attribute(:registered_through, parent_host)
+    end
+
     # rubocop:disable MethodLength
     def authorize_proxy_routes
       deny_access unless (authenticate || authenticate_client)

app/models/katello/concerns/subscription_facet_host_extensions.rb

@@ -23,6 +23,7 @@ module SubscriptionFacetHostExtensions
         scoped_search :on => :autoheal, :in => :subscription_facet, :complete_value => true
         scoped_search :on => :service_level, :in => :subscription_facet, :complete_value => true
         scoped_search :on => :last_checkin, :in => :subscription_facet, :complete_value => true
+        scoped_search :on => :registered_through, :in => :subscription_facet, :complete_value => true
         scoped_search :on => :registered_at, :in => :subscription_facet, :rename => :registered_at
         scoped_search :on => :uuid, :in => :subscription_facet, :rename => :subscription_uuid
         scoped_search :in => :activation_keys, :on => :name, :rename => :activation_key, :complete_value => true, :ext_method => :find_by_activation_key

app/views/katello/api/v2/subscription_facet/base.json.rabl

@@ -1 +1 @@
-attributes :id, :uuid, :last_checkin, :service_level, :release_version, :autoheal, :registered_at
+attributes :id, :uuid, :last_checkin, :service_level, :release_version, :autoheal, :registered_at, :registered_through

db/migrate/20160727144242_add_registered_through_to_katello_subscription_facets.rb

@@ -0,0 +1,5 @@
+class AddRegisteredThroughToKatelloSubscriptionFacets < ActiveRecord::Migration
+  def change
+    add_column :katello_subscription_facets, :registered_through, :string
+  end
+end

engines/bastion_katello/app/assets/javascripts/bastion_katello/content-hosts/details/views/content-host-info.html

@@ -61,6 +61,11 @@ <h4 translate>Basic Information</h4>
         </div>
       </div>
 
+      <div class="detail">
+        <span class="info-label" translate>Registered Through</span>
+        <span class="info-value">{{ host.subscription_facet_attributes.registered_through || "Unknown"}}</span>
+      </div>
+
       <div ng-show="host.subscription_facet_attributes.virtual_host" class="detail">
         <span class="info-label" translate>Virtual Host</span>
         <div class="info-value">

test/controllers/api/rhsm/candlepin_proxies_controller_test.rb

@@ -298,5 +298,19 @@ def test_regenerate_indentity_certificates
         refute_nil @host.subscription_facet.reload.last_checkin
       end
     end
+
+    describe "get parent host" do
+      it "can get parent host" do
+        capsule = "foocapsule.example.com"
+
+        host_and_capsule = {"HTTP_X_FORWARDED_SERVER" => "#{capsule}, foo.example.com"}
+        just_capsule = {"HTTP_X_FORWARDED_SERVER" => "#{capsule}"}
+        nil_host = {}
+
+        assert_equal @controller.get_parent_host(host_and_capsule), "#{capsule}"
+        assert_equal @controller.get_parent_host(just_capsule), "#{capsule}"
+        assert_includes [Facter.value(:fqdn), SETTINGS[:fqdn]], @controller.get_parent_host(nil_host)
+      end
+    end
   end
 end