feat: show assignment policy name in auto-assignment activity messages (#13598)

app/models/concerns/activity_message_handler.rb

@@ -1,6 +1,7 @@
 module ActivityMessageHandler
   extend ActiveSupport::Concern
 
+  include AssigneeActivityMessageHandler
   include PriorityActivityMessageHandler
   include LabelActivityMessageHandler
   include SlaActivityMessageHandler
@@ -104,27 +105,6 @@ module ActivityMessageHandler
     content = I18n.t("conversations.activity.#{change_type}", user_name: Current.user.name)
     ::Conversations::ActivityMessageJob.perform_later(self, activity_message_params(content)) if content
   end
-
-  def generate_assignee_change_activity_content(user_name)
-    params = { assignee_name: assignee&.name || '', user_name: user_name }
-    key = assignee_id ? 'assigned' : 'removed'
-    key = 'self_assigned' if self_assign? assignee_id
-    I18n.t("conversations.activity.assignee.#{key}", **params)
-  end
-
-  def create_assignee_change_activity(user_name)
-    user_name = activity_message_owner(user_name)
-
-    return unless user_name
-
-    content = generate_assignee_change_activity_content(user_name)
-    ::Conversations::ActivityMessageJob.perform_later(self, activity_message_params(content)) if content
-  end
-
-  def activity_message_owner(user_name)
-    user_name = I18n.t('automation.system_name') if !user_name && Current.executed_by.present?
-    user_name
-  end
 end
 
 ActivityMessageHandler.prepend_mod_with('ActivityMessageHandler')

app/models/concerns/assignee_activity_message_handler.rb

@@ -0,0 +1,35 @@
+module AssigneeActivityMessageHandler
+  extend ActiveSupport::Concern
+
+  private
+
+  def create_assignee_change_activity(user_name)
+    user_name = activity_message_owner(user_name)
+
+    return unless user_name
+
+    content = generate_assignee_change_activity_content(user_name)
+    ::Conversations::ActivityMessageJob.perform_later(self, activity_message_params(content)) if content
+  end
+
+  def generate_assignee_change_activity_content(user_name)
+    params = { assignee_name: assignee&.name || '', user_name: user_name }
+    key = assignee_id ? 'assigned' : 'removed'
+    key = 'self_assigned' if self_assign? assignee_id
+    I18n.t("conversations.activity.assignee.#{key}", **params)
+  end
+
+  def activity_message_owner(user_name)
+    if !user_name && Current.executed_by.present?
+      user_name = case Current.executed_by
+                  when AssignmentPolicy
+                    I18n.t('auto_assignment.policy_actor', policy_name: Current.executed_by.name)
+                  when Inbox
+                    I18n.t('auto_assignment.default_policy_name')
+                  else
+                    I18n.t('automation.system_name')
+                  end
+    end
+    user_name
+  end
+end