Filesystem.hh

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/*
 * Copyright 2017 Open Source Robotics Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

#ifndef IGNITION_COMMON_FILESYSTEM_HH_
#define IGNITION_COMMON_FILESYSTEM_HH_

#include <memory>
#include <string>

#include <ignition/common/Export.hh>
#include <ignition/common/SuppressWarning.hh>

namespace ignition
{
  namespace common
  {
    enum FilesystemWarningOp
    {
      FSWO_LOG_WARNINGS = 0,

      FSWO_SUPPRESS_WARNINGS
    };

    bool IGNITION_COMMON_VISIBLE exists(const std::string &_path);

    bool IGNITION_COMMON_VISIBLE isDirectory(const std::string &_path);

    bool IGNITION_COMMON_VISIBLE isFile(const std::string &_path);

    bool IGNITION_COMMON_VISIBLE createDirectory(const std::string &_path);

    bool IGNITION_COMMON_VISIBLE createDirectories(const std::string &_path);

    std::string IGNITION_COMMON_VISIBLE const separator(
        std::string const &_s);

    void IGNITION_COMMON_VISIBLE changeFromUnixPath(std::string &_path);

    std::string IGNITION_COMMON_VISIBLE copyFromUnixPath(
        const std::string &_path);

    void IGNITION_COMMON_VISIBLE changeToUnixPath(std::string &_path);

    std::string IGNITION_COMMON_VISIBLE copyToUnixPath(
        const std::string &_path);

    std::string IGNITION_COMMON_VISIBLE absPath(const std::string &_path);

    std::string IGNITION_COMMON_VISIBLE joinPaths(const std::string &_path1,
                                                  const std::string &_path2);

    inline std::string joinPaths(const std::string &_path)
    {
      return _path;
    }

    // The below is C++ variadic template magic to allow a joinPaths
    // method that takes 1-n number of arguments to append together.

    template<typename... Args>
    inline std::string joinPaths(const std::string &_path1,
                                 const std::string &_path2,
                                 Args const &..._args)
    {
      return joinPaths(joinPaths(_path1, _path2),
                       joinPaths(_args...));
    }

    std::string IGNITION_COMMON_VISIBLE cwd();

    std::string IGNITION_COMMON_VISIBLE basename(
        const std::string &_path);

    bool IGNITION_COMMON_VISIBLE copyFile(
        const std::string &_existingFilename,
        const std::string &_newFilename,
        const FilesystemWarningOp _warningOp = FSWO_LOG_WARNINGS);

    bool IGNITION_COMMON_VISIBLE moveFile(
        const std::string &_existingFilename,
        const std::string &_newFilename,
        const FilesystemWarningOp _warningOp = FSWO_LOG_WARNINGS);

    bool IGNITION_COMMON_VISIBLE removeDirectory(
        const std::string &_path,
        const FilesystemWarningOp _warningOp = FSWO_LOG_WARNINGS);

    bool IGNITION_COMMON_VISIBLE removeFile(
        const std::string &_existingFilename,
        const FilesystemWarningOp _warningOp = FSWO_LOG_WARNINGS);

    bool IGNITION_COMMON_VISIBLE removeDirectoryOrFile(
        const std::string &_path,
        const FilesystemWarningOp _warningOp = FSWO_LOG_WARNINGS);

    bool IGNITION_COMMON_VISIBLE removeAll(
        const std::string &_path,
        const FilesystemWarningOp _warningOp = FSWO_LOG_WARNINGS);

    class DirIterPrivate;

    class IGNITION_COMMON_VISIBLE DirIter
    {
      public: explicit DirIter(const std::string &_in);

      public: DirIter();

      public: std::string operator*() const;

      public: const DirIter &operator++();

      public: bool operator!=(const DirIter &_other) const;

      public: ~DirIter();

      private: void Next();

      private: void SetInternalEmpty();

      private: void CloseHandle();

      IGN_COMMON_WARN_IGNORE__DLL_INTERFACE_MISSING
      private: std::unique_ptr<DirIterPrivate> dataPtr;
      IGN_COMMON_WARN_RESUME__DLL_INTERFACE_MISSING
    };
  }
}

#endif