--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OrthancServer/Plugins/Samples/Common/FullOrthancDataset.cpp	Wed Jun 10 20:30:34 2020 +0200
@@ -0,0 +1,215 @@
+/**
+ * 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 "FullOrthancDataset.h"
+
+#include "OrthancPluginException.h"
+
+#include <stdio.h>
+#include <cassert>
+
+namespace OrthancPlugins
+{
+  static const Json::Value* AccessTag(const Json::Value& dataset,
+                                      const DicomTag& tag) 
+  {
+    if (dataset.type() != Json::objectValue)
+    {
+      ORTHANC_PLUGINS_THROW_EXCEPTION(BadFileFormat);
+    }
+
+    char name[16];
+    sprintf(name, "%04x,%04x", tag.GetGroup(), tag.GetElement());
+
+    if (!dataset.isMember(name))
+    {
+      return NULL;
+    }
+
+    const Json::Value& value = dataset[name];
+    if (value.type() != Json::objectValue ||
+        !value.isMember("Name") ||
+        !value.isMember("Type") ||
+        !value.isMember("Value") ||
+        value["Name"].type() != Json::stringValue ||
+        value["Type"].type() != Json::stringValue)
+    {
+      ORTHANC_PLUGINS_THROW_EXCEPTION(BadFileFormat);
+    }
+
+    return &value;
+  }
+
+
+  static const Json::Value& GetSequenceContent(const Json::Value& sequence)
+  {
+    assert(sequence.type() == Json::objectValue);
+    assert(sequence.isMember("Type"));
+    assert(sequence.isMember("Value"));
+
+    const Json::Value& value = sequence["Value"];
+      
+    if (sequence["Type"].asString() != "Sequence" ||
+        value.type() != Json::arrayValue)
+    {
+      ORTHANC_PLUGINS_THROW_EXCEPTION(BadFileFormat);
+    }
+    else
+    {
+      return value;
+    }
+  }
+
+
+  static bool GetStringInternal(std::string& result,
+                                const Json::Value& tag)
+  {
+    assert(tag.type() == Json::objectValue);
+    assert(tag.isMember("Type"));
+    assert(tag.isMember("Value"));
+
+    const Json::Value& value = tag["Value"];
+      
+    if (tag["Type"].asString() != "String" ||
+        value.type() != Json::stringValue)
+    {
+      ORTHANC_PLUGINS_THROW_EXCEPTION(BadFileFormat);
+    }
+    else
+    {
+      result = value.asString();
+      return true;
+    }
+  }
+
+
+  const Json::Value* FullOrthancDataset::LookupPath(const DicomPath& path) const
+  {
+    const Json::Value* content = &root_;
+                                  
+    for (unsigned int depth = 0; depth < path.GetPrefixLength(); depth++)
+    {
+      const Json::Value* sequence = AccessTag(*content, path.GetPrefixTag(depth));
+      if (sequence == NULL)
+      {
+        return NULL;
+      }
+
+      const Json::Value& nextContent = GetSequenceContent(*sequence);
+
+      size_t index = path.GetPrefixIndex(depth);
+      if (index >= nextContent.size())
+      {
+        return NULL;
+      }
+      else
+      {
+        content = &nextContent[static_cast<Json::Value::ArrayIndex>(index)];
+      }
+    }
+
+    return AccessTag(*content, path.GetFinalTag());
+  }
+
+
+  void FullOrthancDataset::CheckRoot() const
+  {
+    if (root_.type() != Json::objectValue)
+    {
+      ORTHANC_PLUGINS_THROW_EXCEPTION(BadFileFormat);
+    }
+  }
+
+
+  FullOrthancDataset::FullOrthancDataset(IOrthancConnection& orthanc,
+                                         const std::string& uri)
+  {
+    IOrthancConnection::RestApiGet(root_, orthanc, uri);
+    CheckRoot();
+  }
+
+
+  FullOrthancDataset::FullOrthancDataset(const std::string& content)
+  {
+    IOrthancConnection::ParseJson(root_, content);
+    CheckRoot();
+  }
+
+
+  FullOrthancDataset::FullOrthancDataset(const void* content,
+                                         size_t size)
+  {
+    IOrthancConnection::ParseJson(root_, content, size);
+    CheckRoot();
+  }
+
+
+  FullOrthancDataset::FullOrthancDataset(const Json::Value& root) :
+    root_(root)
+  {
+    CheckRoot();
+  }
+
+
+  bool FullOrthancDataset::GetStringValue(std::string& result,
+                                          const DicomPath& path) const
+  {
+    const Json::Value* value = LookupPath(path);
+
+    if (value == NULL)
+    {
+      return false;
+    }
+    else
+    {
+      return GetStringInternal(result, *value);
+    }
+  }
+
+
+  bool FullOrthancDataset::GetSequenceSize(size_t& size,
+                                           const DicomPath& path) const
+  {
+    const Json::Value* sequence = LookupPath(path);
+
+    if (sequence == NULL)
+    {
+      return false;
+    }
+    else
+    {
+      size = GetSequenceContent(*sequence).size();
+      return true;
+    }
+  }
+}