--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Loaders/SeriesThumbnailsLoader.h	Wed Apr 22 14:05:47 2020 +0200
@@ -0,0 +1,210 @@
+/**
+ * Stone of Orthanc
+ * 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 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 "../Oracle/GetOrthancImageCommand.h"
+#include "../Oracle/HttpCommand.h"
+#include "../Oracle/OracleCommandExceptionMessage.h"
+#include "../Oracle/OrthancRestApiCommand.h"
+#include "DicomSource.h"
+#include "ILoaderFactory.h"
+#include "OracleScheduler.h"
+
+
+namespace OrthancStone
+{
+  enum SeriesThumbnailType
+  {
+    SeriesThumbnailType_NotLoaded = 1,  // The remote server cannot decode this image
+    SeriesThumbnailType_Unsupported = 2,  // The remote server cannot decode this image
+    SeriesThumbnailType_Pdf = 3,
+    SeriesThumbnailType_Video = 4,
+    SeriesThumbnailType_Image = 5
+  };
+  
+
+  class SeriesThumbnailsLoader :
+    public IObservable,
+    public ObserverBase<SeriesThumbnailsLoader>
+  {
+  private:
+    class Thumbnail : public boost::noncopyable
+    {
+    private:
+      SeriesThumbnailType  type_;
+      std::string          image_;
+      std::string          mime_;
+
+    public:
+      Thumbnail(const std::string& image,
+                const std::string& mime);
+
+      Thumbnail(SeriesThumbnailType type);
+
+      SeriesThumbnailType GetType() const
+      {
+        return type_;
+      }
+
+      const std::string& GetImage() const
+      {
+        return image_;
+      }
+
+      const std::string& GetMime() const
+      {
+        return mime_;
+      }
+    };
+
+  public:
+    class ThumbnailLoadedMessage : public OriginMessage<SeriesThumbnailsLoader>
+    {
+      ORTHANC_STONE_MESSAGE(__FILE__, __LINE__);
+      
+    private:
+      const DicomSource&   source_;
+      const std::string&   studyInstanceUid_;
+      const std::string&   seriesInstanceUid_;
+      const Thumbnail&     thumbnail_;
+
+    public:
+      ThumbnailLoadedMessage(const SeriesThumbnailsLoader& origin,
+                             const DicomSource& source,
+                             const std::string& studyInstanceUid,
+                             const std::string& seriesInstanceUid,
+                             const Thumbnail& thumbnail) :
+        OriginMessage(origin),
+        source_(source),
+        studyInstanceUid_(studyInstanceUid),
+        seriesInstanceUid_(seriesInstanceUid),
+        thumbnail_(thumbnail)
+      {
+      }
+
+      const DicomSource& GetDicomSource() const
+      {
+        return source_;
+      }
+
+      SeriesThumbnailType GetType() const
+      {
+        return thumbnail_.GetType();
+      }
+
+      const std::string& GetStudyInstanceUid() const
+      {
+        return studyInstanceUid_;
+      }
+
+      const std::string& GetSeriesInstanceUid() const
+      {
+        return seriesInstanceUid_;
+      }
+
+      const std::string& GetEncodedImage() const
+      {
+        return thumbnail_.GetImage();
+      }
+
+      const std::string& GetMime() const
+      {
+        return thumbnail_.GetMime();
+      }
+    };
+
+  private:
+    class Handler;
+    class DicomWebSopClassHandler;
+    class DicomWebThumbnailHandler;
+    class ThumbnailInformation;
+    class OrthancSopClassHandler;
+    class SelectOrthancInstanceHandler;
+    
+    // Maps a "Series Instance UID" to a thumbnail
+    typedef std::map<std::string, Thumbnail*>  Thumbnails;
+
+    ILoadersContext&  context_;
+    Thumbnails      thumbnails_;
+    int             priority_;
+    unsigned int    width_;
+    unsigned int    height_;
+
+    void AcquireThumbnail(const DicomSource& source,
+                          const std::string& studyInstanceUid,
+                          const std::string& seriesInstanceUid,
+                          Thumbnail* thumbnail /* takes ownership */);
+
+    void Schedule(IOracleCommand* command);
+  
+    void Handle(const HttpCommand::SuccessMessage& message);
+
+    void Handle(const OrthancRestApiCommand::SuccessMessage& message);
+
+    void Handle(const GetOrthancImageCommand::SuccessMessage& message);
+
+    void Handle(const OracleCommandExceptionMessage& message);
+
+    SeriesThumbnailsLoader(ILoadersContext& context,
+                           int priority);
+    
+  public:
+    class Factory : public ILoaderFactory
+    {
+    private:
+      int priority_;
+
+    public:
+      Factory() :
+        priority_(0)
+      {
+      }
+
+      void SetPriority(int priority)
+      {
+        priority_ = priority;
+      }
+
+      virtual boost::shared_ptr<IObserver> Create(ILoadersContext::ILock& context);
+    };
+
+
+    virtual ~SeriesThumbnailsLoader()
+    {
+      Clear();
+    }
+
+    void SetThumbnailSize(unsigned int width,
+                          unsigned int height);
+    
+    void Clear();
+    
+    SeriesThumbnailType GetSeriesThumbnail(std::string& image,
+                                           std::string& mime,
+                                           const std::string& seriesInstanceUid) const;
+
+    void ScheduleLoadThumbnail(const DicomSource& source,
+                               const std::string& patientId,
+                               const std::string& studyInstanceUid,
+                               const std::string& seriesInstanceUid);
+  };
+}