--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Toolbox/OrthancApiClient.h	Thu Aug 23 14:45:04 2018 +0200
@@ -0,0 +1,90 @@
+/**
+ * Stone of Orthanc
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2018 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/>.
+ **/
+
+
+#pragma once
+
+#include <boost/shared_ptr.hpp>
+#include <json/json.h>
+
+#include "IWebService.h"
+#include "../Messages/IObservable.h"
+
+
+namespace OrthancStone
+{
+  class OrthancApiClient:
+      public IObservable
+  {
+  protected:
+    class BaseRequest;
+    class GetJsonRequest;
+
+    struct InternalGetJsonResponseReadyMessage;
+    struct InternalGetJsonResponseErrorMessage;
+
+  public:
+    struct GetJsonResponseReadyMessage : public IMessage
+    {
+      Json::Value   response_;
+      std::string   uri_;
+
+      GetJsonResponseReadyMessage(MessageType messageType,
+                                  const std::string& uri,
+                                  const Json::Value& response)
+        : IMessage(messageType),
+          uri_(uri),
+          response_(response)
+      {
+      }
+    };
+
+  public:
+
+    enum Mode
+    {
+      Mode_GetJson
+    };
+
+  protected:
+    IWebService&                      orthanc_;
+    class WebCallback;
+    boost::shared_ptr<WebCallback>    webCallback_;  // This is a PImpl pattern
+    std::set<BaseRequest*>            requestsInProgress_;
+
+//    int ScheduleGetJsonRequest(const std::string& uri);
+
+    void ReleaseRequest(BaseRequest* request);
+
+  public:
+    OrthancApiClient(MessageBroker& broker,
+                        IWebService& orthanc);
+    virtual ~OrthancApiClient() {}
+
+    // schedule a GET request expecting a JSON request.
+    // once the response is ready, it will emit a OrthancApiClient::GetJsonResponseReadyMessage message whose messageType is specified in the call
+    void ScheduleGetJsonRequest(IObserver& responseObserver, const std::string& uri, MessageType messageToEmitWhenResponseReady);
+
+    void ScheduleGetStudyIds(IObserver& responseObserver) {ScheduleGetJsonRequest(responseObserver, "/studies", MessageType_OrthancApi_GetStudyIds_Ready);}
+    void ScheduleGetStudy(IObserver& responseObserver, const std::string& studyId) {ScheduleGetJsonRequest(responseObserver, "/studies/" + studyId, MessageType_OrthancApi_GetStudy_Ready);}
+    void ScheduleGetSeries(IObserver& responseObserver, const std::string& seriesId) {ScheduleGetJsonRequest(responseObserver, "/series/" + seriesId, MessageType_OrthancApi_GetSeries_Ready);}
+
+  };
+}