#include "wrap-sstream.hpp"
#include "wrap-string.hpp"

static eng::string url_encode(const eng::string &value) {
    eng::ostringstream escaped;
    escaped.fill('0');
    escaped << hex;

    for (int i = 0; i < int(value.size()); i++) {
        char c = value[i];

        // Keep alphanumeric and other accepted characters intact
        // Any other characters are percent-encoded
        if (std::isalnum(c) || c == '-' || c == '_' || c == '.' || c == '~') {
            escaped << c;
        } else {
            escaped << std::uppercase;
            escaped << '%' << std::setw(2) << int((unsigned char) c);
            escaped << std::nouppercase;
        }
    }

    return escaped.str();
}