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/*
This file is part of libdjinterop.
libdjinterop is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
libdjinterop 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with libdjinterop. If not, see <http://www.gnu.org/licenses/>.
*/
#include <djinterop/util.hpp>
#include <ios>
#include <random>
#include <sstream>
#include <string>
#include <sys/stat.h>
#if defined(_WIN32)
#include <direct.h>
#endif
#include <djinterop/optional.hpp>
namespace djinterop
{
void create_dir(const std::string& directory)
{
#if defined(_WIN32)
if (_mkdir(directory.c_str()) != 0)
#else
if (mkdir(directory.c_str(), 0755) != 0)
#endif
{
throw std::runtime_error{"Failed to create directory"};
}
}
bool dir_exists(const std::string& directory)
{
struct stat buf;
return stat(directory.c_str(), &buf) == 0;
}
std::string generate_random_uuid()
{
static std::random_device rng;
static std::mt19937 generator{rng()};
static std::uniform_int_distribution<int> nibble_dist{0, 15};
static std::uniform_int_distribution<int> variant_nibble_dist{8, 11};
// Generate a version 4 (random), variant 1 UUID.
std::stringstream ss;
ss << std::hex << nibble_dist(generator) << nibble_dist(generator)
<< nibble_dist(generator) << nibble_dist(generator)
<< nibble_dist(generator) << nibble_dist(generator)
<< nibble_dist(generator) << nibble_dist(generator) << "-"
<< nibble_dist(generator) << nibble_dist(generator)
<< nibble_dist(generator) << nibble_dist(generator)
<< "-4" // Version 4 indicator
<< nibble_dist(generator) << nibble_dist(generator)
<< nibble_dist(generator) << "-"
<< variant_nibble_dist(generator) // Variant 1 indicator
<< nibble_dist(generator) << nibble_dist(generator)
<< nibble_dist(generator) << "-" << nibble_dist(generator)
<< nibble_dist(generator) << nibble_dist(generator)
<< nibble_dist(generator) << nibble_dist(generator)
<< nibble_dist(generator) << nibble_dist(generator)
<< nibble_dist(generator) << nibble_dist(generator)
<< nibble_dist(generator) << nibble_dist(generator)
<< nibble_dist(generator);
return ss.str();
}
std::string get_filename(const std::string& file_path)
{
// TODO (haslersn): How to handle Windows path separator?
auto slash_pos = file_path.rfind('/'); // returns -1 in case of no match
return file_path.substr(slash_pos + 1);
}
stdx::optional<std::string> get_file_extension(const std::string& file_path)
{
auto filename = get_filename(file_path);
stdx::optional<std::string> file_extension;
auto dot_pos = filename.rfind('.');
if (dot_pos != std::string::npos)
{
file_extension = filename.substr(dot_pos + 1);
}
return file_extension;
}
} // namespace djinterop
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