// Small case-insensitive text helpers shared by the host panels' filter boxes, so
// "error" matches "ERROR" everywhere consistently. ASCII-fold only (the UI filters
// are typed ASCII); non-ASCII bytes compare as-is.
#pragma once

#include <cctype>
#include <string>

namespace coop
{

inline std::string ascii_lower(std::string s)
{
	for (char& c : s)
	{
		c = static_cast<char>(std::tolower(static_cast<unsigned char>(c)));
	}
	return s;
}

// True when `needle` is empty or a case-insensitive substring of `haystack`.
inline bool contains_ci(const std::string& haystack, const char* needle)
{
	if (needle == nullptr || needle[0] == '\0')
	{
		return true;
	}
	return ascii_lower(haystack).find(ascii_lower(needle)) != std::string::npos;
}

} // namespace coop