#include <psemek/util/string.hpp>

namespace psemek::util
{

	std::string replace_all(std::string str, std::string_view old_str, std::string_view new_str)
	{
		for (size_t i = 0;;)
		{
			i = str.find(old_str, i);
			if (i == std::string::npos) break;
			str.replace(i, old_str.size(), new_str);
			i += new_str.size();
		}
		return str;
	}

	static std::string const whitespace_mask = " \t\n\r\f\v";

	std::string trim_front(std::string str)
	{
		str.erase(0, str.find_first_not_of(whitespace_mask));
		return str;
	}

	std::string trim_back(std::string str)
	{
		size_t pos = str.find_last_not_of(whitespace_mask);
		if (pos != std::string::npos) {
			str.erase(pos + 1);
		} else {
			str.clear();
		}
		return str;
	}

	std::string trim(std::string str)
	{
		return trim_back(trim_front(std::move(str)));
	}

}