--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OrthancServer/Sources/Database/Compatibility/ICreateInstance.cpp	Wed Jun 10 20:30:34 2020 +0200
@@ -0,0 +1,157 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2020 Osimis S.A., Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * In addition, as a special exception, the copyright holders of this
+ * program give permission to link the code of its release with the
+ * OpenSSL project's "OpenSSL" library (or with modified versions of it
+ * that use the same license as the "OpenSSL" library), and distribute
+ * the linked executables. You must obey the GNU General Public License
+ * in all respects for all of the code used other than "OpenSSL". If you
+ * modify file(s) with this exception, you may extend this exception to
+ * your version of the file(s), but you are not obligated to do so. If
+ * you do not wish to do so, delete this exception statement from your
+ * version. If you delete this exception statement from all source files
+ * in the program, then also delete it here.
+ * 
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#include "../../PrecompiledHeadersServer.h"
+#include "ICreateInstance.h"
+
+#include "../../../Core/OrthancException.h"
+
+namespace Orthanc
+{
+  namespace Compatibility
+  {
+    bool ICreateInstance::Apply(ICreateInstance& database,
+                                IDatabaseWrapper::CreateInstanceResult& result,
+                                int64_t& instanceId,
+                                const std::string& hashPatient,
+                                const std::string& hashStudy,
+                                const std::string& hashSeries,
+                                const std::string& hashInstance)
+    {
+      {
+        ResourceType type;
+        int64_t tmp;
+        
+        if (database.LookupResource(tmp, type, hashInstance))
+        {
+          // The instance already exists
+          assert(type == ResourceType_Instance);
+          instanceId = tmp;
+          return false;
+        }
+      }
+
+      instanceId = database.CreateResource(hashInstance, ResourceType_Instance);
+
+      result.isNewPatient_ = false;
+      result.isNewStudy_ = false;
+      result.isNewSeries_ = false;
+      result.patientId_ = -1;
+      result.studyId_ = -1;
+      result.seriesId_ = -1;
+      
+      // Detect up to which level the patient/study/series/instance
+      // hierarchy must be created
+
+      {
+        ResourceType dummy;
+
+        if (database.LookupResource(result.seriesId_, dummy, hashSeries))
+        {
+          assert(dummy == ResourceType_Series);
+          // The patient, the study and the series already exist
+
+          bool ok = (database.LookupResource(result.patientId_, dummy, hashPatient) &&
+                     database.LookupResource(result.studyId_, dummy, hashStudy));
+          assert(ok);
+        }
+        else if (database.LookupResource(result.studyId_, dummy, hashStudy))
+        {
+          assert(dummy == ResourceType_Study);
+
+          // New series: The patient and the study already exist
+          result.isNewSeries_ = true;
+
+          bool ok = database.LookupResource(result.patientId_, dummy, hashPatient);
+          assert(ok);
+        }
+        else if (database.LookupResource(result.patientId_, dummy, hashPatient))
+        {
+          assert(dummy == ResourceType_Patient);
+
+          // New study and series: The patient already exist
+          result.isNewStudy_ = true;
+          result.isNewSeries_ = true;
+        }
+        else
+        {
+          // New patient, study and series: Nothing exists
+          result.isNewPatient_ = true;
+          result.isNewStudy_ = true;
+          result.isNewSeries_ = true;
+        }
+      }
+
+      // Create the series if needed
+      if (result.isNewSeries_)
+      {
+        result.seriesId_ = database.CreateResource(hashSeries, ResourceType_Series);
+      }
+
+      // Create the study if needed
+      if (result.isNewStudy_)
+      {
+        result.studyId_ = database.CreateResource(hashStudy, ResourceType_Study);
+      }
+
+      // Create the patient if needed
+      if (result.isNewPatient_)
+      {
+        result.patientId_ = database.CreateResource(hashPatient, ResourceType_Patient);
+      }
+
+      // Create the parent-to-child links
+      database.AttachChild(result.seriesId_, instanceId);
+
+      if (result.isNewSeries_)
+      {
+        database.AttachChild(result.studyId_, result.seriesId_);
+      }
+
+      if (result.isNewStudy_)
+      {
+        database.AttachChild(result.patientId_, result.studyId_);
+      }
+
+      database.TagMostRecentPatient(result.patientId_);
+      
+      // Sanity checks
+      assert(result.patientId_ != -1);
+      assert(result.studyId_ != -1);
+      assert(result.seriesId_ != -1);
+      assert(instanceId != -1);
+
+      return true;
+    }
+  }
+}