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// Copyright (c) 2014-2015, Pacific Biosciences of California, Inc.
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted (subject to the limitations in the
// disclaimer below) provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// * 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.
//
// * Neither the name of Pacific Biosciences nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE
// GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY PACIFIC
// BIOSCIENCES AND ITS 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 PACIFIC BIOSCIENCES OR ITS
// 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.
// Author: Derek Barnett
#ifndef FILEUTILS_H
#define FILEUTILS_H
#include <chrono>
#include <string>
namespace PacBio {
namespace BAM {
namespace internal {
struct FileUtils
{
public:
/// \returns application's current working directory
static std::string CurrentWorkingDirectory(void);
/// Parses a filepath for the the directory name for a file.
///
/// Essentially this method strips the filename from the string provided (/path/to/file => /path/to).
/// If only a filename is provided, then "." is returned to indicate the current directory.
///
/// \param[in] file name of file (can be just a filename or path/to/filename)
/// \returns file's directory name
///
static std::string DirectoryName(const std::string& file);
/// Check for existence of a file.
///
/// \param[in] fn full path to file
/// \returns true if file exists & can be opened
///
static bool Exists(const char* fn);
/// Check for existence of a file.
///
/// \param[in] fn full path to file
/// \returns true if file exists & can be opened
///
static bool Exists(const std::string& fn);
/// Check "last modified" timestamp for a file.
///
/// \param[in] fn full path to file
/// \returns time of last modification
/// \throws runtime_error if file info can't be accessed
///
static std::chrono::system_clock::time_point LastModified(const char* fn);
/// Check "last modified" timestamp for a file.
///
/// \param[in] fn full path to file
/// \returns time of last modification
/// \throws runtime_error if file info can't be accessed
///
static std::chrono::system_clock::time_point LastModified(const std::string& fn);
/// Resolves input file path using optional starting directory.
///
/// \verbatim
/// /absolute/path/to/file.txt => /absolute/path/to/file.txt
/// ../relative/path/to/file.txt => <from>/../relative/path/to/file.txt
/// file.txt => <from>/file.txt
/// \endverbatim
///
/// \note This method will strip any URI scheme as well ("file://") so that the result is immediately ready from I/O operations.
///
/// \param[in] filePath file path to be resolved
/// \param[in] from optional starting directory (useful if not same as application's working directory)
/// \returns resolved file path
///
static std::string ResolvedFilePath(const std::string& filePath,
const std::string& from = ".");
/// \returns native path separator
constexpr static char Separator(void);
/// Check size of file.
///
/// \param[in] fn full path to file
/// \returns file size in bytes
/// \throws runtime_error if file info can't be accessed
///
static off_t Size(const char* fn);
/// Check size of file.
///
/// \param[in] fn full path to file
/// \returns file size in bytes
/// \throws runtime_error if file info can't be accessed
///
static off_t Size(const std::string& fn);
};
inline bool FileUtils::Exists(const std::string& fn)
{ return FileUtils::Exists(fn.c_str()); }
inline std::chrono::system_clock::time_point FileUtils::LastModified(const std::string& fn)
{ return FileUtils::LastModified(fn.c_str()); }
inline off_t FileUtils::Size(const std::string& fn)
{ return FileUtils::Size(fn.c_str()); }
} // namespace internal
} // namespace BAM
} // namespace PacBio
#endif // FILEUTILS_H
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