1 files changed, 101 insertions, 0 deletions
diff --git a/src/djinterop/util.cpp b/src/djinterop/util.cpp
new file mode 100644
index 0000000..8154bfa
--- /dev/null
+++ b/src/djinterop/util.cpp
@@ -0,0 +1,101 @@
+/*
+    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