refactor(captain): share FAQ suggestion visibility scope

enterprise/app/controllers/api/v1/accounts/captain/faq_suggestions_controller.rb

@@ -58,13 +58,7 @@ class Api::V1::Accounts::Captain::FaqSuggestionsController < Api::V1::Accounts::
   end
 
   def set_suggestions
-    @suggestions = Current.account.captain_faq_suggestions.includes(:assistant).ordered
-    return if Current.account_user.administrator?
-
-    accessible_suggestion_ids = Captain::FaqObservation
-                                .where(conversation_id: accessible_conversations.select(:id))
-                                .select(:faq_suggestion_id)
-    @suggestions = @suggestions.where(id: accessible_suggestion_ids)
+    @suggestions = Captain::FaqSuggestionFinder.new(Current.user, Current.account).perform.includes(:assistant).ordered
   end
 
   def set_suggestion

enterprise/app/finders/captain/faq_suggestion_finder.rb

@@ -0,0 +1,26 @@
+class Captain::FaqSuggestionFinder
+  def initialize(current_user, current_account)
+    @current_user = current_user
+    @current_account = current_account
+  end
+
+  def perform
+    suggestions = @current_account.captain_faq_suggestions
+    return suggestions if account_user&.administrator?
+
+    accessible_suggestion_ids = Captain::FaqObservation
+                                .where(conversation_id: accessible_conversations.select(:id))
+                                .select(:faq_suggestion_id)
+    suggestions.where(id: accessible_suggestion_ids)
+  end
+
+  private
+
+  def accessible_conversations
+    Conversations::PermissionFilterService.new(@current_account.conversations, @current_user, @current_account).perform
+  end
+
+  def account_user
+    @account_user ||= @current_account.account_users.find_by(user_id: @current_user.id)
+  end
+end