--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OrthancStone/Sources/Toolbox/OrthancDatasets/OrthancNativeDataset.cpp	Tue Oct 22 21:52:34 2024 +0200
@@ -0,0 +1,213 @@
+/**
+ * Stone of Orthanc
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2023 Osimis S.A., Belgium
+ * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program. If not, see
+ * <http://www.gnu.org/licenses/>.
+ **/
+
+
+#include "OrthancNativeDataset.h"
+
+#include <OrthancException.h>
+
+
+static const char* const NAME = "Name";
+static const char* const TYPE = "Type";
+static const char* const VALUE = "Value";
+
+
+namespace OrthancStone
+{
+  const Json::Value* OrthancNativeDataset::LookupValue(std::string& type,
+                                                       const Orthanc::DicomPath& path) const
+  {
+    if (path.IsPrefixUniversal(0))
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
+    }
+
+    const Orthanc::DicomValue* rootSequence = dicom_->TestAndGetValue(path.GetPrefixTag(0));
+    if (rootSequence == NULL ||
+        !rootSequence->IsSequence())
+    {
+      return NULL;
+    }
+
+    Json::ArrayIndex index = path.GetPrefixIndex(0);
+
+    if (rootSequence->GetSequenceContent().type() != Json::arrayValue)
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
+    }
+
+    if (index >= rootSequence->GetSequenceContent().size())
+    {
+      return NULL;
+    }
+
+    const Json::Value* current = &(rootSequence->GetSequenceContent() [index]);
+
+    for (size_t i = 1; i < path.GetPrefixLength(); i++)
+    {
+      if (path.IsPrefixUniversal(i))
+      {
+        throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
+      }
+
+      index = path.GetPrefixIndex(i);
+      std::string tag = path.GetPrefixTag(i).Format();
+
+      if (current->type() != Json::objectValue)
+      {
+        throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
+      }
+
+      if (!current->isMember(tag))
+      {
+        return NULL;
+      }
+
+      if ((*current) [tag].type() != Json::objectValue ||
+          !(*current) [tag].isMember(NAME) ||
+          !(*current) [tag].isMember(TYPE) ||
+          !(*current) [tag].isMember(VALUE) ||
+          (*current) [tag][NAME].type() != Json::stringValue ||
+          (*current) [tag][TYPE].type() != Json::stringValue)
+      {
+        throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
+      }
+
+      if ((*current) [tag][TYPE].asString() != "Sequence" ||
+          (*current) [tag][VALUE].type() != Json::arrayValue ||
+          index >= (*current) [tag][VALUE].size())
+      {
+        return NULL;
+      }
+
+      current = &(*current) [tag][VALUE][index];
+    }
+
+    std::string tag = path.GetFinalTag().Format();
+
+    if (current->type() != Json::objectValue)
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
+    }
+
+    if (!current->isMember(tag))
+    {
+      return NULL;
+    }
+
+    if ((*current) [tag].type() != Json::objectValue ||
+        !(*current) [tag].isMember(NAME) ||
+        !(*current) [tag].isMember(TYPE) ||
+        !(*current) [tag].isMember(VALUE) ||
+        (*current) [tag][NAME].type() != Json::stringValue ||
+        (*current) [tag][TYPE].type() != Json::stringValue)
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
+    }
+    else
+    {
+      type = (*current) [tag][TYPE].asString();
+      return &((*current) [tag][VALUE]);
+    }
+  }
+
+
+  OrthancNativeDataset::OrthancNativeDataset(const Json::Value& dicom) :
+    dicom_(new Orthanc::DicomMap)
+  {
+    dicom_->FromDicomAsJson(dicom, false, true /* parse sequences */);
+  }
+
+
+  bool OrthancNativeDataset::GetStringValue(std::string& result,
+                                            const Orthanc::DicomPath& path) const
+  {
+    if (path.GetPrefixLength() == 0)
+    {
+      return dicom_->LookupStringValue(result, path.GetFinalTag(), false);
+    }
+    else
+    {
+      std::string type;
+      const Json::Value* value = LookupValue(type, path);
+
+      if (value == NULL)
+      {
+        return false;
+      }
+      else if (type == "String" &&
+               value->type() == Json::stringValue)
+      {
+        result = value->asString();
+        return true;
+      }
+      else
+      {
+        throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
+      }
+    }
+  }
+
+
+  bool OrthancNativeDataset::GetSequenceSize(size_t& size,
+                                             const Orthanc::DicomPath& path) const
+  {
+    if (path.GetPrefixLength() == 0)
+    {
+      const Orthanc::DicomValue* value = dicom_->TestAndGetValue(path.GetFinalTag());
+      if (value == NULL ||
+          !value->IsSequence())
+      {
+        return false;
+      }
+      else if (value->GetSequenceContent().type() != Json::arrayValue)
+      {
+        throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
+      }
+      else
+      {
+        size = value->GetSequenceContent().size();
+        return true;
+      }
+    }
+    else
+    {
+      std::string type;
+      const Json::Value* value = LookupValue(type, path);
+
+      if (value == NULL ||
+          type != "Sequence")
+      {
+        return false;
+      }
+      else if (value->type() != Json::arrayValue)
+      {
+        throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
+      }
+      else
+      {
+        size = value->size();
+        return true;
+      }
+    }
+  }
+}