#pragma once

#include <cstdlib>

namespace kvida {

// Minimal '%XX' + '+' decoder for URL-encoded form fields (in place).
// Shared by commissioning.cpp's Wi-Fi setup form and mqtt.cpp's MQTT
// settings form.
inline void url_decode(char *s)
{
    char *out = s;
    while (*s) {
        if (*s == '+') {
            *out++ = ' ';
            s++;
        } else if (*s == '%' && s[1] && s[2]) {
            const char hex[3] = {s[1], s[2], 0};
            *out++ = static_cast<char>(strtol(hex, nullptr, 16));
            s += 3;
        } else {
            *out++ = *s++;
        }
    }
    *out = '\0';
}

} // namespace kvida