From 69a404a31f488e15ccb57db94b1c805719b1277f Mon Sep 17 00:00:00 2001
From: Dmitriy Kopylenko <dima767@gmail.com>
Date: Wed, 5 Jun 2019 12:07:06 -0400
Subject: [PATCH] WIP1

---
 .../admin/ui/configuration/DevConfig.groovy   |  4 +--
 .../EntitiesVersioningConfiguration.java      | 12 ++++---
 .../EnversEntityDescriptorVersionService.java | 32 +++++++++++++++++++
 3 files changed, 41 insertions(+), 7 deletions(-)
 create mode 100644 backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/service/EnversEntityDescriptorVersionService.java

diff --git a/backend/src/main/groovy/edu/internet2/tier/shibboleth/admin/ui/configuration/DevConfig.groovy b/backend/src/main/groovy/edu/internet2/tier/shibboleth/admin/ui/configuration/DevConfig.groovy
index 6f853e089..b49d5b858 100644
--- a/backend/src/main/groovy/edu/internet2/tier/shibboleth/admin/ui/configuration/DevConfig.groovy
+++ b/backend/src/main/groovy/edu/internet2/tier/shibboleth/admin/ui/configuration/DevConfig.groovy
@@ -162,10 +162,10 @@ class DevConfig {
         })
     }
 
-    @Profile('dev-ed-versioning')
+    /*@Profile('dev-ed-versioning')
     @Bean
     EntityDescriptorVersionService stubEntityDescriptorVersionService(EntityDescriptorService entityDescriptorService,
                                                                       EntityDescriptorRepository entityDescriptorRepository) {
         return EntityDescriptorVersionService.stubImpl(entityDescriptorService, entityDescriptorRepository)
-    }
+    }*/
 }
diff --git a/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/configuration/EntitiesVersioningConfiguration.java b/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/configuration/EntitiesVersioningConfiguration.java
index 5f1b64b46..75dfb5ded 100644
--- a/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/configuration/EntitiesVersioningConfiguration.java
+++ b/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/configuration/EntitiesVersioningConfiguration.java
@@ -1,15 +1,17 @@
 package edu.internet2.tier.shibboleth.admin.ui.configuration;
 
-import edu.internet2.tier.shibboleth.admin.ui.service.EntityDescriptorService;
 import edu.internet2.tier.shibboleth.admin.ui.service.EntityDescriptorVersionService;
+import edu.internet2.tier.shibboleth.admin.ui.service.EnversEntityDescriptorVersionService;
+import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
+import javax.persistence.EntityManager;
+
 @Configuration
 public class EntitiesVersioningConfiguration {
 
-    //@Bean
-    EntityDescriptorVersionService entityDescriptorVersionService(EntityDescriptorService entityDescriptorService) {
-        //TODO create real impl when available
-        return null;
+    @Bean
+    EntityDescriptorVersionService entityDescriptorVersionService(EntityManager entityManager) {
+        return new EnversEntityDescriptorVersionService(entityManager);
     }
 }
diff --git a/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/service/EnversEntityDescriptorVersionService.java b/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/service/EnversEntityDescriptorVersionService.java
new file mode 100644
index 000000000..c5cbabc27
--- /dev/null
+++ b/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/service/EnversEntityDescriptorVersionService.java
@@ -0,0 +1,32 @@
+package edu.internet2.tier.shibboleth.admin.ui.service;
+
+import edu.internet2.tier.shibboleth.admin.ui.domain.frontend.EntityDescriptorRepresentation;
+import edu.internet2.tier.shibboleth.admin.ui.domain.versioning.Version;
+import org.hibernate.envers.AuditReader;
+import org.hibernate.envers.AuditReaderFactory;
+
+import javax.persistence.EntityManager;
+import java.util.List;
+
+/**
+ * Hibernate Envers based implementation of {@link EntityDescriptorVersionService}.
+ */
+public class EnversEntityDescriptorVersionService implements EntityDescriptorVersionService {
+
+    private AuditReader auditReader;
+
+    public EnversEntityDescriptorVersionService(EntityManager em) {
+
+        this.auditReader = AuditReaderFactory.get(em);
+    }
+
+    @Override
+    public List<Version> findVersionsForEntityDescriptor(String resourceId) {
+        return null;
+    }
+
+    @Override
+    public EntityDescriptorRepresentation findSpecificVersionOfEntityDescriptor(String resourceId, String versionId) {
+        return null;
+    }
+}