--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Sources/Plugin.cpp	Wed Mar 22 10:16:47 2023 +0100
@@ -0,0 +1,162 @@
+/**
+ * SPDX-FileCopyrightText: 2023 Sebastien Jodogne, UCLouvain, Belgium
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+/**
+ * Kitware's VolView plugin for Orthanc
+ * Copyright (C) 2023 Sebastien Jodogne, UCLouvain, 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.
+ *
+ * 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 "../Resources/Orthanc/Plugins/OrthancPluginCppWrapper.h"
+
+#include <Logging.h>
+#include <SystemToolbox.h>
+
+#include <EmbeddedResources.h>
+
+#include <boost/thread/shared_mutex.hpp>
+
+// Forward declaration
+void ReadStaticAsset(std::string& target,
+                     const std::string& path);
+
+
+/**
+ * As the VolView static assets are gzipped by the "EmbedResources.py"
+ * script, we use a cache to maintain the uncompressed assets in order
+ * to avoid multiple gzip decodings.
+ **/
+class ResourcesCache : public boost::noncopyable
+{
+private:
+  typedef std::map<std::string, std::string*>  Content;
+  
+  boost::shared_mutex  mutex_;
+  Content              content_;
+
+public:
+  ~ResourcesCache()
+  {
+    for (Content::iterator it = content_.begin(); it != content_.end(); ++it)
+    {
+      assert(it->second != NULL);
+      delete it->second;
+    }
+  }
+
+  void Answer(OrthancPluginRestOutput* output,
+              const std::string& path)
+  {
+    const std::string mime = Orthanc::EnumerationToString(Orthanc::SystemToolbox::AutodetectMimeType(path));
+
+    {
+      // Check whether the cache already contains the resource
+      boost::shared_lock<boost::shared_mutex> lock(mutex_);
+
+      Content::const_iterator found = content_.find(path);
+    
+      if (found != content_.end())
+      {
+        assert(found->second != NULL);
+        OrthancPluginAnswerBuffer(OrthancPlugins::GetGlobalContext(), output, found->second->c_str(), found->second->size(), mime.c_str());
+        return;
+      }
+    }
+
+    // This resource has not been cached yet
+
+    std::unique_ptr<std::string> item(new std::string);
+    ReadStaticAsset(*item, path);
+    OrthancPluginAnswerBuffer(OrthancPlugins::GetGlobalContext(), output, item->c_str(), item->size(), mime.c_str());
+
+    {
+      // Store the resource into the cache
+      boost::unique_lock<boost::shared_mutex> lock(mutex_);
+
+      if (content_.find(path) == content_.end())
+      {
+        content_[path] = item.release();
+      }
+    }
+  }
+};
+
+
+static ResourcesCache cache_;
+
+void ServeFile(OrthancPluginRestOutput* output,
+               const char* url,
+               const OrthancPluginHttpRequest* request)
+{
+  cache_.Answer(output, request->groups[0]);
+}
+
+extern "C"
+{
+  ORTHANC_PLUGINS_API int32_t OrthancPluginInitialize(OrthancPluginContext* context)
+  {
+    OrthancPlugins::SetGlobalContext(context);
+
+    /* Check the version of the Orthanc core */
+    if (OrthancPluginCheckVersion(OrthancPlugins::GetGlobalContext()) == 0)
+    {
+      char info[1024];
+      sprintf(info, "Your version of Orthanc (%s) must be above %d.%d.%d to run this plugin",
+              OrthancPlugins::GetGlobalContext()->orthancVersion,
+              ORTHANC_PLUGINS_MINIMAL_MAJOR_NUMBER,
+              ORTHANC_PLUGINS_MINIMAL_MINOR_NUMBER,
+              ORTHANC_PLUGINS_MINIMAL_REVISION_NUMBER);
+      OrthancPluginLogError(OrthancPlugins::GetGlobalContext(), info);
+      return -1;
+    }
+
+#if ORTHANC_FRAMEWORK_VERSION_IS_ABOVE(1, 7, 2)
+    Orthanc::Logging::InitializePluginContext(context);
+#else
+    Orthanc::Logging::Initialize(context);
+#endif
+
+    OrthancPluginSetDescription(context, "Kitware's VolView for Orthanc.");
+
+    OrthancPlugins::RegisterRestCallback<ServeFile>("/volview/(.*)", true);
+
+    // Extend the default Orthanc Explorer with custom JavaScript for VolView
+    std::string explorer;
+    Orthanc::EmbeddedResources::GetFileResource(explorer, Orthanc::EmbeddedResources::ORTHANC_EXPLORER);
+    OrthancPluginExtendOrthancExplorer(OrthancPlugins::GetGlobalContext(), explorer.c_str());
+
+    return 0;
+  }
+
+
+  ORTHANC_PLUGINS_API void OrthancPluginFinalize()
+  {
+  }
+
+
+  ORTHANC_PLUGINS_API const char* OrthancPluginGetName()
+  {
+    return "volview";
+  }
+
+
+  ORTHANC_PLUGINS_API const char* OrthancPluginGetVersion()
+  {
+    return ORTHANC_VOLVIEW_VERSION;
+  }
+}