FileFilters.hpp

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#pragma once
 
#include <regex>
#include <string>
#include <vector>
 
#include "vc/core/filesystem.hpp"
 
namespace volcart
{
namespace io
{
using ExtensionList = std::vector<std::string>;
 
inline auto FileExtensionFilter(
    const filesystem::path& path, const ExtensionList& exts) -> bool
{
    std::string regexExpression = ".*\\.(";
    std::size_t count = 0;
    for (const auto& e : exts) {
        regexExpression.append(e);
        if (++count < exts.size()) {
            regexExpression.append("|");
        }
    }
    regexExpression.append(")$");
 
    const std::regex extensions{regexExpression, std::regex::icase};
    return std::regex_match(path.extension().string(), extensions);
}
 
inline auto UnixHiddenFileFilter(const filesystem::path& path) -> bool
{
    return path.filename().string()[0] == '.';
}
 
}  // namespace io
 
constexpr auto IsFileType = io::FileExtensionFilter;
 
constexpr auto IsUnixHiddenFile = io::UnixHiddenFileFilter;
}  // namespace volcart