Move request action info to a component

In more than one place in the application, we need to know the source
and target packages related to the request action, if any.

So we extract the code from NotificationActionDescriptionComponent
and create an independent component for the source and target
information.

src/api/app/components/bs_request_action_source_and_target_component.rb

@@ -0,0 +1,37 @@
+class BsRequestActionSourceAndTargetComponent < ApplicationComponent
+  attr_reader :bs_request_action, :number_of_bs_request_actions
+
+  def initialize(bs_request)
+    super
+
+    @bs_request = bs_request
+    @bs_request_action = @bs_request.bs_request_actions.first
+    @number_of_bs_request_actions = @bs_request.bs_request_actions.size
+  end
+
+  def call
+    capture do
+      if source.present?
+        concat(tag.span(source))
+        concat(tag.i(nil, class: 'fas fa-long-arrow-alt-right text-info mx-2'))
+      end
+      concat(tag.span(target))
+    end
+  end
+
+  private
+
+  def source
+    @source ||= if number_of_bs_request_actions > 1
+                  ''
+                else
+                  [bs_request_action.source_project, bs_request_action.source_package].compact.join(' / ')
+                end
+  end
+
+  def target
+    return bs_request_action.target_project if number_of_bs_request_actions > 1
+
+    [bs_request_action.target_project, bs_request_action.target_package].compact.join(' / ')
+  end
+end

src/api/app/components/notification_action_description_component.rb

@@ -9,7 +9,7 @@ def call
     tag.div(class: ['smart-overflow']) do
       case @notification.event_type
       when 'Event::RequestStatechange', 'Event::RequestCreate', 'Event::ReviewWanted', 'Event::CommentForRequest'
-        source_and_target
+        BsRequestActionSourceAndTargetComponent.new(bs_request).call
       when 'Event::CommentForProject'
         "#{@notification.notifiable.commentable.name}"
       when 'Event::CommentForPackage'
@@ -21,39 +21,7 @@ def call
 
   private
 
-  def source_and_target
-    capture do
-      if source.present?
-        concat(tag.span(source))
-        concat(tag.i(nil, class: 'fas fa-long-arrow-alt-right text-info mx-2'))
-      end
-      concat(tag.span(target))
-    end
-  end
-
-  def source
-    @source ||= if number_of_bs_request_actions > 1
-                  ''
-                else
-                  [bs_request_action.source_project, bs_request_action.source_package].compact.join(' / ')
-                end
-  end
-
-  def target
-    return bs_request_action.target_project if number_of_bs_request_actions > 1
-
-    [bs_request_action.target_project, bs_request_action.target_package].compact.join(' / ')
-  end
-
   def bs_request
     @bs_request ||= @notification.notifiable_type == 'BsRequest' ? @notification.notifiable : @notification.notifiable.commentable
   end
-
-  def bs_request_action
-    @bs_request_action ||= bs_request.bs_request_actions.first
-  end
-
-  def number_of_bs_request_actions
-    @number_of_bs_request_actions ||= bs_request.bs_request_actions.size
-  end
 end