text: /*********************************************************************************
   *
   * Inviwo - Interactive Visualization Workshop
   *
   * Copyright (c) 2013-2017 Inviwo Foundation
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice, this
   * list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright notice,
   * this list of conditions and the following disclaimer in the documentation
   * and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
   * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   *********************************************************************************/
  
  #include <inviwo/core/util/fileobserver.h>
  #include <inviwo/core/util/filesystem.h>
  #include <inviwo/core/util/stdextensions.h>
  #include <inviwo/core/common/inviwoapplication.h>
  
  namespace inviwo {
  
  void FileObserver::startFileObservation(const std::string& fileName) {
      auto it = observedFiles_.find(fileName);
      if (it == observedFiles_.end()) {
          if (filesystem::fileExists(fileName)) {
              observedFiles_[fileName] = 1;
              InviwoApplication::getPtr()->startFileObservation(fileName);
          }
      } else {
          ++(it->second);
      }
  }
  
  void FileObserver::stopFileObservation(const std::string& fileName) {
      auto it = observedFiles_.find(fileName);
      if (it != observedFiles_.end()) {
          --(it->second);
  
          if (it->second == 0) {
              observedFiles_.erase(it);
              InviwoApplication::getPtr()->stopFileObservation(fileName);
          }
      }
  }
  
  bool FileObserver::isObserved(const std::string& fileName) const {
      return observedFiles_.find(fileName) != observedFiles_.end();
  }
  
  std::vector<std::string> FileObserver::getFiles() const {
      std::vector<std::string> files;
      for (auto& elem : observedFiles_) files.push_back(elem.first);
      return files;
  }
  
  }  // namespace