--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OrthancServer/RadiotherapyRestApi.cpp	Thu Aug 29 17:33:33 2013 +0200
@@ -0,0 +1,169 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2013 Medical Physics Department, CHU of Liege,
+ * 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 "RadiotherapyRestApi.h"
+
+#include "ServerToolbox.h"
+
+#define RETRIEVE_CONTEXT(call)                          \
+  OrthancRestApi& contextApi =                          \
+    dynamic_cast<OrthancRestApi&>(call.GetContext());   \
+  ServerContext& context = contextApi.GetContext()
+
+
+#define REFERENCED_STUDY_SEQUENCE "0008,1110"
+#define REFERENCED_SOP_INSTANCE_UID "0008,1155"
+#define FRAME_OF_REFERENCE_UID "0020,0052"
+#define REFERENCED_FRAME_OF_REFERENCE_SEQUENCE "3006,0010"
+
+namespace Orthanc
+{
+  static bool CheckSeriesModality(Json::Value& study,
+                                  Json::Value& series,
+                                  Json::Value& content,
+                                  ServerContext& context,
+                                  const std::string& seriesId,
+                                  const std::string& modality)
+  {
+    if (!context.GetIndex().LookupResource(series, seriesId, ResourceType_Series))
+    {
+      return false;
+    }
+
+    // Retrieve the parent study
+    std::string studyId = series["ParentStudy"].asString();
+    if (!context.GetIndex().LookupResource(study, studyId, ResourceType_Study))
+    {
+      return false;
+    }
+
+    // Check the modality and that there is a single instance inside the series
+    if (!series["MainDicomTags"].isMember("Modality") ||
+        series["MainDicomTags"]["Modality"].asString() != modality ||
+        series["Instances"].size() != 1)
+    {
+      return false;
+    }
+
+    // Retrieve the instance data
+    std::string instanceId = series["Instances"][0].asString();
+
+    Json::Value info;
+    context.ReadJson(content, instanceId);
+
+    return true;
+  }
+
+
+  static bool GetRtStructuresInfo(Json::Value& study,
+                                  Json::Value& series,
+                                  Json::Value& content,
+                                  std::string& frameOfReference,
+                                  ServerContext& context,
+                                  const std::string& seriesId)
+  {
+    if (!CheckSeriesModality(study, series, content, context, seriesId, "RTSTRUCT"))
+    {
+      return false;
+    }
+
+    // Check that the "ReferencedStudySequence" is the same as the parent study.
+    if (!content.isMember(REFERENCED_STUDY_SEQUENCE) ||
+        content[REFERENCED_STUDY_SEQUENCE]["Value"].size() != 1 ||
+        !content[REFERENCED_STUDY_SEQUENCE]["Value"][0].isMember(REFERENCED_SOP_INSTANCE_UID) ||
+        content[REFERENCED_STUDY_SEQUENCE]["Value"][0][REFERENCED_SOP_INSTANCE_UID]["Value"].asString() != 
+        study["MainDicomTags"]["StudyInstanceUID"].asString())
+    {
+      return false;
+    }
+
+    // Lookup for the frame of reference. Orthanc does not support
+    // RTSTRUCT with multiple frames of reference.
+    if (!content.isMember(REFERENCED_FRAME_OF_REFERENCE_SEQUENCE) ||
+        content[REFERENCED_FRAME_OF_REFERENCE_SEQUENCE]["Value"].size() != 1 ||
+        !content[REFERENCED_FRAME_OF_REFERENCE_SEQUENCE]["Value"][0].isMember(FRAME_OF_REFERENCE_UID))
+    {
+      return false;
+    }
+
+    frameOfReference = content[REFERENCED_FRAME_OF_REFERENCE_SEQUENCE]["Value"][0][FRAME_OF_REFERENCE_UID]["Value"].asString();
+
+    return true;
+  }
+
+
+  static void GetRtStructuresInfo(RestApi::GetCall& call)
+  {
+    RETRIEVE_CONTEXT(call);
+
+    Json::Value study, series, content;
+    std::string frameOfReference;
+    if (GetRtStructuresInfo(study, series, content, frameOfReference, context, call.GetUriComponent("id", "")))
+    {
+      Json::Value result;
+
+      result["Study"] = study["ID"];
+
+
+      // Lookup the series with the same frame of reference inside this study
+      result["RelatedSeries"] = Json::arrayValue;
+
+      for (Json::Value::ArrayIndex i = 0; i < study["Series"].size(); i++)
+      {
+        Json::Value otherSeries;
+        if (context.GetIndex().LookupResource(otherSeries, study["Series"][i].asString(), ResourceType_Series) &&
+            otherSeries["Instances"].size() > 0)
+        {
+          Json::Value info;
+          context.ReadJson(info, otherSeries["Instances"][0].asString());
+
+          if (info.isMember(FRAME_OF_REFERENCE_UID))
+          {
+            result["RelatedSeries"].append(study["Series"][i].asString());
+          }
+        }
+      }
+
+      call.GetOutput().AnswerJson(result);
+    }
+  }
+
+
+  RadiotherapyRestApi::RadiotherapyRestApi(ServerContext& context) : OrthancRestApi(context)
+  {
+    Register("/series/{id}/rt-structures", GetRtStructuresInfo);
+  }
+}
+
+
+//  curl http://localhost:8042/series/0b9e2bb2-605a59aa-f27c0260-9cc4faf6-9d8bf457/rt-structures
+//  curl http://localhost:8042/series/ef041e6b-c855e775-f7e0f7fe-dc3c17dc-533cb8c5/rt-structures