From 4a13ae26da12daa2479be68506e3cd9cc5f51a98 Mon Sep 17 00:00:00 2001
From: Justin Coyne <jcoyne@justincoyne.com>
Date: Fri, 31 Aug 2018 10:19:27 -0500
Subject: [PATCH] Allow for a pluggable minter service (#1295)

---
 lib/active_fedora/persistence.rb                  | 15 ++++++++++++++-
 .../persistence/null_identifier_service.rb        | 11 +++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)
 create mode 100644 lib/active_fedora/persistence/null_identifier_service.rb

diff --git a/lib/active_fedora/persistence.rb b/lib/active_fedora/persistence.rb
index b10aac0d3..56d40936f 100644
--- a/lib/active_fedora/persistence.rb
+++ b/lib/active_fedora/persistence.rb
@@ -2,6 +2,13 @@ module ActiveFedora
   # = Active Fedora Persistence
   module Persistence
     extend ActiveSupport::Concern
+    extend ActiveSupport::Autoload
+    autoload :NullIdentifierService
+
+    included do
+      class_attribute :identifier_service_class
+      self.identifier_service_class = NullIdentifierService
+    end
 
     def new_record?
       return true if @ldp_source.subject.nil?
@@ -209,7 +216,13 @@ def execute_sparql_update
       end
 
       # Override to tie in an ID minting service
-      def assign_id; end
+      def assign_id
+        identifier_service.mint
+      end
+
+      def identifier_service
+        @identifier_service ||= identifier_service_class.new
+      end
 
       # This is only used when creating a new record. If the object doesn't have an id
       # and assign_id can mint an id for the object, then assign it to the resource.
diff --git a/lib/active_fedora/persistence/null_identifier_service.rb b/lib/active_fedora/persistence/null_identifier_service.rb
new file mode 100644
index 000000000..3be1743f2
--- /dev/null
+++ b/lib/active_fedora/persistence/null_identifier_service.rb
@@ -0,0 +1,11 @@
+module ActiveFedora
+  module Persistence
+    # An identifier service that doesn't mint IDs, so that the autocreated
+    # identifiers from Fedora will be used.
+    class NullIdentifierService
+      # Effectively a no-op
+      # @return [NilClass]
+      def mint; end
+    end
+  end
+end