utility: boost integration

Added boost components: filesystem and system to the project
environment varibable BOOST_155_DIR targeting the boost_1_55_0 folder is needed

review id = 14

fortune cookie message = when you speak honestly and openly, others truly listen to you

src/lib/CMakeLists.txt

@@ -98,7 +98,7 @@ add_files(
 	utility/logging/LogManagerImplementation.cpp
 	utility/logging/LogManagerImplementation.h
 	utility/logging/LogMessage.h
-	
+
 	utility/math/Color.h
 	utility/math/Vector2.h
 	utility/math/Vector4.h
@@ -112,6 +112,8 @@ add_files(
 
 	utility/ConfigManager.cpp
 	utility/ConfigManager.h
+	utility/FileSystem.cpp
+	utility/FileSystem.h
 	utility/Vector.h
 
 	Application.cpp

src/lib/utility/FileSystem.cpp

@@ -0,0 +1,43 @@
+#include "utility/FileSystem.h"
+
+#include "boost/filesystem.hpp"
+#include "utility/logging/logging.h"
+
+std::vector<std::string> FileSystem::getSourceFilesFromDirectory(
+	const std::string& path, const std::vector<std::string>& extensions
+)
+{
+	std::vector<std::string> files;
+	if (boost::filesystem::is_directory(path))
+	{
+		boost::filesystem::recursive_directory_iterator it(path);
+		boost::filesystem::recursive_directory_iterator endit;
+		while(it != endit)
+		{
+			if (boost::filesystem::is_regular_file(*it) && isValidExtension(it->path().string(), extensions))
+			{
+				files.push_back(it->path().string());
+			}
+			++it;
+		}
+	}
+	return files;
+}
+
+bool FileSystem::isValidExtension(const std::string& filepath, const std::vector<std::string>& extensions)
+{
+	boost::filesystem::path path(filepath);
+	for(std::string extension : extensions)
+	{
+		if(path.extension() == extension)
+		{
+			return true;
+		}
+	}
+	return false;
+}
+
+bool FileSystem::exists(const std::string& path)
+{
+	return boost::filesystem::exists(boost::filesystem::path(path));
+}

src/lib/utility/FileSystem.h

@@ -0,0 +1,18 @@
+#ifndef FILE_SYSTEM_H
+#define FILE_SYSTEM_H
+
+#include <string>
+#include <vector>
+
+class FileSystem
+{
+public:
+	static std::vector<std::string> getSourceFilesFromDirectory(
+		const std::string& path, const std::vector<std::string>& extensions
+	);
+	static bool exists(const std::string& path);
+private:
+	static bool isValidExtension(const std::string& filepath, const std::vector<std::string>& extensions);
+};
+
+#endif // FILE_SYSTEM_H