--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Loaders/LoadedDicomResources.cpp	Mon Dec 09 13:58:37 2019 +0100
@@ -0,0 +1,216 @@
+/**
+ * Stone of Orthanc
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2019 Osimis S.A., Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Affero General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * 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
+ * Affero General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#include "LoadedDicomResources.h"
+
+#include <Core/OrthancException.h>
+
+#include <cassert>
+
+
+namespace OrthancStone
+{
+  void LoadedDicomResources::Flatten()
+  {
+    // Lazy generation of a "std::vector" from the "std::map"
+    if (flattened_.empty())
+    {
+      flattened_.resize(resources_.size());
+
+      size_t pos = 0;
+      for (Resources::const_iterator it = resources_.begin(); it != resources_.end(); ++it)
+      {
+        assert(it->second != NULL);
+        flattened_[pos++] = it->second;
+      }
+    }
+    else
+    {
+      // No need to flatten
+      assert(flattened_.size() == resources_.size());
+    }
+  }
+
+
+  void LoadedDicomResources::AddFromDicomWebInternal(const Json::Value& dicomweb)
+  {
+    assert(dicomweb.type() == Json::objectValue);
+    Orthanc::DicomMap dicom;
+    dicom.FromDicomWeb(dicomweb);
+    AddResource(dicom);
+  }
+
+  
+  LoadedDicomResources::LoadedDicomResources(const LoadedDicomResources& other,
+                                             const Orthanc::DicomTag& indexedTag) :
+    indexedTag_(indexedTag)
+  {
+    for (Resources::const_iterator it = other.resources_.begin();
+         it != other.resources_.end(); ++it)
+    {
+      assert(it->second != NULL);
+      AddResource(*it->second);
+    }
+  }
+
+  void LoadedDicomResources::Clear()
+  {
+    for (Resources::iterator it = resources_.begin(); it != resources_.end(); ++it)
+    {
+      assert(it->second != NULL);
+      delete it->second;
+    }
+
+    resources_.clear();
+    flattened_.clear();
+  }
+
+
+  Orthanc::DicomMap& LoadedDicomResources::GetResource(size_t index)
+  {
+    Flatten();
+
+    if (index >= flattened_.size())
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
+    }
+    else
+    {
+      assert(flattened_[index] != NULL);
+      return *flattened_[index];
+    }
+  }
+
+
+  bool LoadedDicomResources::LookupStringValue(std::string& target,
+                                               const std::string& id,
+                                               const Orthanc::DicomTag& tag) const
+  {
+    Resources::const_iterator found = resources_.find(id);
+
+    if (found == resources_.end())
+    {
+      return false;
+    }
+    else
+    {
+      assert(found->second != NULL);
+      return found->second->LookupStringValue(target, tag, false);
+    }  
+  }
+
+  
+  void LoadedDicomResources::AddResource(const Orthanc::DicomMap& dicom)
+  {
+    std::string id;
+    
+    if (dicom.LookupStringValue(id, indexedTag_, false /* no binary value */) &&
+        resources_.find(id) == resources_.end() /* Don't index twice the same resource */)
+    {
+      resources_[id] = dicom.Clone();
+      flattened_.clear();   // Invalidate the flattened version 
+    }
+  }
+
+
+  void LoadedDicomResources::AddFromOrthanc(const Json::Value& tags)
+  {
+    Orthanc::DicomMap dicom;
+    dicom.FromDicomAsJson(tags);
+    AddResource(dicom);
+  }
+
+
+  void LoadedDicomResources::AddFromDicomWeb(const Json::Value& dicomweb)
+  {
+    if (dicomweb.type() == Json::objectValue)
+    {
+      AddFromDicomWebInternal(dicomweb);
+    }
+    else if (dicomweb.type() == Json::arrayValue)
+    {
+      for (Json::Value::ArrayIndex i = 0; i < dicomweb.size(); i++)
+      {
+        if (dicomweb[i].type() == Json::objectValue)
+        {
+          AddFromDicomWebInternal(dicomweb[i]);
+        }
+        else
+        {
+          throw Orthanc::OrthancException(Orthanc::ErrorCode_NetworkProtocol);
+        }
+      }
+    }
+    else
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_NetworkProtocol);
+    }
+  }
+
+
+  bool LoadedDicomResources::LookupTagValueConsensus(std::string& target,
+                                                     const Orthanc::DicomTag& tag) const
+  {
+    typedef std::map<std::string, unsigned int>  Counter;
+
+    Counter counter;
+
+    for (Resources::const_iterator it = resources_.begin(); it != resources_.end(); ++it)
+    {
+      assert(it->second != NULL);
+      
+      std::string value;
+      if (it->second->LookupStringValue(value, tag, false))
+      {
+        Counter::iterator found = counter.find(value);
+        if (found == counter.end())
+        {
+          counter[value] = 1;
+        }
+        else
+        {
+          found->second ++;
+        }
+      }
+    }
+
+    Counter::const_iterator best = counter.end();
+    
+    for (Counter::const_iterator it = counter.begin(); it != counter.end(); ++it)
+    {
+      if (best == counter.end() ||
+          best->second < it->second)
+      {
+        best = it;
+      }
+    }
+
+    if (best == counter.end())
+    {
+      return false;
+    }
+    else
+    {
+      target = best->first;
+      return true;
+    }
+  }
+}