--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OrthancFramework/Sources/Compression/ZipWriter.cpp	Wed Jun 10 20:30:34 2020 +0200
@@ -0,0 +1,262 @@
+/**
+ * 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 "../PrecompiledHeaders.h"
+
+#ifndef NOMINMAX
+#define NOMINMAX
+#endif
+
+#include "ZipWriter.h"
+
+#include <limits>
+#include <boost/filesystem.hpp>
+#include <boost/date_time/posix_time/posix_time.hpp>
+
+#include "../../Resources/ThirdParty/minizip/zip.h"
+#include "../OrthancException.h"
+#include "../Logging.h"
+
+
+static void PrepareFileInfo(zip_fileinfo& zfi)
+{
+  memset(&zfi, 0, sizeof(zfi));
+
+  using namespace boost::posix_time;
+  ptime now = second_clock::local_time();
+
+  boost::gregorian::date today = now.date();
+  ptime midnight(today);
+
+  time_duration sinceMidnight = now - midnight;
+  zfi.tmz_date.tm_sec = static_cast<unsigned int>(sinceMidnight.seconds());  // seconds after the minute - [0,59]
+  zfi.tmz_date.tm_min = static_cast<unsigned int>(sinceMidnight.minutes());  // minutes after the hour - [0,59]
+  zfi.tmz_date.tm_hour = static_cast<unsigned int>(sinceMidnight.hours());  // hours since midnight - [0,23]
+
+  // http://www.boost.org/doc/libs/1_35_0/doc/html/boost/gregorian/greg_day.html
+  zfi.tmz_date.tm_mday = today.day();  // day of the month - [1,31]
+
+  // http://www.boost.org/doc/libs/1_35_0/doc/html/boost/gregorian/greg_month.html
+  zfi.tmz_date.tm_mon = today.month() - 1;  // months since January - [0,11]
+
+  // http://www.boost.org/doc/libs/1_35_0/doc/html/boost/gregorian/greg_year.html
+  zfi.tmz_date.tm_year = today.year();  // years - [1980..2044]
+}
+
+
+
+namespace Orthanc
+{
+  struct ZipWriter::PImpl
+  {
+    zipFile file_;
+
+    PImpl() : file_(NULL)
+    {
+    }
+  };
+
+  ZipWriter::ZipWriter() :
+    pimpl_(new PImpl),
+    isZip64_(false),
+    hasFileInZip_(false),
+    append_(false),
+    compressionLevel_(6)
+  {
+  }
+
+  ZipWriter::~ZipWriter()
+  {
+    Close();
+  }
+
+  void ZipWriter::Close()
+  {
+    if (IsOpen())
+    {
+      zipClose(pimpl_->file_, "Created by Orthanc");
+      pimpl_->file_ = NULL;
+      hasFileInZip_ = false;
+    }
+  }
+
+  bool ZipWriter::IsOpen() const
+  {
+    return pimpl_->file_ != NULL;
+  }
+
+  void ZipWriter::Open()
+  {
+    if (IsOpen())
+    {
+      return;
+    }
+
+    if (path_.size() == 0)
+    {
+      throw OrthancException(ErrorCode_BadSequenceOfCalls,
+                             "Please call SetOutputPath() before creating the file");
+    }
+
+    hasFileInZip_ = false;
+
+    int mode = APPEND_STATUS_CREATE;
+    if (append_ && 
+        boost::filesystem::exists(path_))
+    {
+      mode = APPEND_STATUS_ADDINZIP;
+    }
+
+    if (isZip64_)
+    {
+      pimpl_->file_ = zipOpen64(path_.c_str(), mode);
+    }
+    else
+    {
+      pimpl_->file_ = zipOpen(path_.c_str(), mode);
+    }
+
+    if (!pimpl_->file_)
+    {
+      throw OrthancException(ErrorCode_CannotWriteFile,
+                             "Cannot create new ZIP archive: " + path_);
+    }
+  }
+
+  void ZipWriter::SetOutputPath(const char* path)
+  {
+    Close();
+    path_ = path;
+  }
+
+  void ZipWriter::SetZip64(bool isZip64)
+  {
+    Close();
+    isZip64_ = isZip64;
+  }
+
+  void ZipWriter::SetCompressionLevel(uint8_t level)
+  {
+    if (level >= 10)
+    {
+      throw OrthancException(ErrorCode_ParameterOutOfRange,
+                             "ZIP compression level must be between 0 (no compression) "
+                             "and 9 (highest compression)");
+    }
+
+    Close();
+    compressionLevel_ = level;
+  }
+
+  void ZipWriter::OpenFile(const char* path)
+  {
+    Open();
+
+    zip_fileinfo zfi;
+    PrepareFileInfo(zfi);
+
+    int result;
+
+    if (isZip64_)
+    {
+      result = zipOpenNewFileInZip64(pimpl_->file_, path,
+                                     &zfi,
+                                     NULL,   0,
+                                     NULL,   0,
+                                     "",  // Comment
+                                     Z_DEFLATED,
+                                     compressionLevel_, 1);
+    }
+    else
+    {
+      result = zipOpenNewFileInZip(pimpl_->file_, path,
+                                   &zfi,
+                                   NULL,   0,
+                                   NULL,   0,
+                                   "",  // Comment
+                                   Z_DEFLATED,
+                                   compressionLevel_);
+    }
+
+    if (result != 0)
+    {
+      throw OrthancException(ErrorCode_CannotWriteFile,
+                             "Cannot add new file inside ZIP archive: " + std::string(path));
+    }
+
+    hasFileInZip_ = true;
+  }
+
+
+  void ZipWriter::Write(const std::string& data)
+  {
+    if (data.size())
+    {
+      Write(&data[0], data.size());
+    }
+  }
+
+
+  void ZipWriter::Write(const void* data, size_t length)
+  {
+    if (!hasFileInZip_)
+    {
+      throw OrthancException(ErrorCode_BadSequenceOfCalls, "Call first OpenFile()");
+    }
+
+    const size_t maxBytesInAStep = std::numeric_limits<int32_t>::max();
+
+    const char* p = reinterpret_cast<const char*>(data);
+    
+    while (length > 0)
+    {
+      int bytes = static_cast<int32_t>(length <= maxBytesInAStep ? length : maxBytesInAStep);
+
+      if (zipWriteInFileInZip(pimpl_->file_, p, bytes))
+      {
+        throw OrthancException(ErrorCode_CannotWriteFile,
+                               "Cannot write data to ZIP archive: " + path_);
+      }
+      
+      p += bytes;
+      length -= bytes;
+    }
+  }
+
+
+  void ZipWriter::SetAppendToExisting(bool append)
+  {
+    Close();
+    append_ = append;
+  }
+}