--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OrthancServer/Sources/QueryRetrieveHandler.cpp	Wed Jun 10 20:30:34 2020 +0200
@@ -0,0 +1,171 @@
+/**
+ * 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 "QueryRetrieveHandler.h"
+
+#include "OrthancConfiguration.h"
+
+#include "../Core/DicomNetworking/DicomControlUserConnection.h"
+#include "../Core/DicomParsing/FromDcmtkBridge.h"
+#include "../Core/Logging.h"
+#include "LuaScripting.h"
+#include "ServerContext.h"
+
+
+namespace Orthanc
+{
+  static void FixQueryLua(DicomMap& query,
+                          ServerContext& context,
+                          const std::string& modality)
+  {
+    static const char* LUA_CALLBACK = "OutgoingFindRequestFilter";
+
+    LuaScripting::Lock lock(context.GetLuaScripting());
+
+    if (lock.GetLua().IsExistingFunction(LUA_CALLBACK))
+    {
+      LuaFunctionCall call(lock.GetLua(), LUA_CALLBACK);
+      call.PushDicom(query);
+      call.PushJson(modality);
+      FromDcmtkBridge::ExecuteToDicom(query, call);
+    }
+  }
+
+
+  void QueryRetrieveHandler::Invalidate()
+  {
+    done_ = false;
+    answers_.Clear();
+  }
+
+
+  void QueryRetrieveHandler::Run()
+  {
+    if (!done_)
+    {
+      // Firstly, fix the content of the query for specific manufacturers
+      DicomMap fixed;
+      fixed.Assign(query_);
+
+      // Secondly, possibly fix the query with the user-provider Lua callback
+      FixQueryLua(fixed, context_, modality_.GetApplicationEntityTitle()); 
+
+      {
+        DicomAssociationParameters params(localAet_, modality_);
+        DicomControlUserConnection connection(params);
+        connection.Find(answers_, level_, fixed, findNormalized_);
+      }
+
+      done_ = true;
+    }
+  }
+
+
+  QueryRetrieveHandler::QueryRetrieveHandler(ServerContext& context) : 
+    context_(context),
+    localAet_(context.GetDefaultLocalApplicationEntityTitle()),
+    done_(false),
+    level_(ResourceType_Study),
+    answers_(false),
+    findNormalized_(true)
+  {
+  }
+
+
+  void QueryRetrieveHandler::SetModality(const std::string& symbolicName)
+  {
+    Invalidate();
+    modalityName_ = symbolicName;
+
+    {
+      OrthancConfiguration::ReaderLock lock;
+      lock.GetConfiguration().GetDicomModalityUsingSymbolicName(modality_, symbolicName);
+    }
+  }
+
+
+  void QueryRetrieveHandler::SetLevel(ResourceType level)
+  {
+    Invalidate();
+    level_ = level;
+  }
+
+
+  void QueryRetrieveHandler::SetQuery(const DicomTag& tag,
+                                      const std::string& value)
+  {
+    Invalidate();
+    query_.SetValue(tag, value, false);
+  }
+
+
+  void QueryRetrieveHandler::CopyStringTag(const DicomMap& from,
+                                           const DicomTag& tag)
+  {
+    const DicomValue* value = from.TestAndGetValue(tag);
+
+    if (value == NULL ||
+        value->IsNull() ||
+        value->IsBinary())
+    {
+      throw OrthancException(ErrorCode_InexistentTag);
+    }
+    else
+    {
+      SetQuery(tag, value->GetContent());
+    }
+  }
+
+
+  size_t QueryRetrieveHandler::GetAnswersCount()
+  {
+    Run();
+    return answers_.GetSize();
+  }
+
+
+  void QueryRetrieveHandler::GetAnswer(DicomMap& target,
+                                       size_t i)
+  {
+    Run();
+    answers_.GetAnswer(i).ExtractDicomSummary(target);
+  }
+
+  
+  void QueryRetrieveHandler::SetFindNormalized(bool normalized)
+  {
+    Invalidate();
+    findNormalized_ = normalized;
+  }
+}