Helium Services

GURL GetExtensionUpdateURL(const PrefService& prefs) {
    if (!ShouldAccessExtensionService(prefs)) {
        return GetDummyURL();
    }
    return GetServicesBaseURL(prefs).Resolve("/extensions/update");
}

GURL GetBrowserUpdateURL(const PrefService& prefs) {
    if (!ShouldAccessUpdateService(prefs)) {
        return GetDummyURL();
    }
    // Platform-specific URL construction
    return GetServicesBaseURL(prefs).Resolve("/updates/browser/...");
}

GURL GetUBlockAssetsURL(const PrefService& prefs) {
    if (!ShouldAccessUBlockAssets(prefs)) {
        return GetDummyURL();
    }
    return GetServicesBaseURL(prefs).Resolve("/ubo/assets.json");
}

GURL GetSpellcheckURL(const PrefService& prefs) {
    if (!ShouldAccessServices(prefs)) {
        return GetDummyURL();
    }
    return GetServicesBaseURL(prefs).Resolve("/spellcheck/...");
}

inline constexpr int kHeliumCurrentSchemaVersion = 1;

static constexpr auto kHeliumSchemaChangelog =
    base::MakeFixedFlatMap<int, std::string_view>({
        {
          1,
          "Automatic component updates are now available. "
          "They're managed by the same toggle that enables automatic browser updates.\n"
          "From now on, you'll be notified about major changes to Helium services. "
          "Even though these notifications are extremely rare, you can choose to "
          "ignore them and accept all future changes automatically."
        }
    });

const char kHeliumDefaultOrigin[] = "https://services.helium.imput.net";

std::optional<GURL> GetValidUserOverridenURL(std::string_view user_url_) {
    if (user_url_.empty()) {
        return std::nullopt;
    }
    
    GURL user_url = GURL(user_url_);
    if (!user_url.is_valid()) {
        return std::nullopt;
    }
    
    bool isSecure = user_url.SchemeIs(url::kHttpsScheme) || 
                    net::IsLocalhost(user_url);
    if (!isSecure) {
        return std::nullopt;
    }
    
    return user_url;
}