Including system metadata when posting to utility API

internal/system/metadata_windows.go

@@ -0,0 +1,74 @@
+package system
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"log"
+	"os"
+	"strings"
+	"unsafe"
+
+	"github.com/microsoft/wmi/pkg/base/host"
+	hh "github.com/microsoft/wmi/pkg/hardware/host"
+	"golang.org/x/sys/windows"
+)
+
+// GetActiveDirectoryDomain returns AD domain name of this computer.
+func GetActiveDirectoryDomain() (string, error) {
+	log.SetOutput(io.Discard)
+	defer log.SetOutput(os.Stderr)
+
+	// 1) Check environment variable
+	envDomain := os.Getenv("USERDNSDOMAIN")
+	if envDomain != "" {
+		return strings.TrimSpace(envDomain), nil
+	}
+
+	// 2) Query WMI via the microsoft/wmi library
+	whost := host.NewWmiLocalHost()
+	cs, err := hh.GetComputerSystem(whost)
+	if cs != nil {
+		defer cs.Close()
+	}
+	if err != nil {
+		return "", err
+	}
+	pod, err := cs.GetPropertyPartOfDomain()
+	if err != nil {
+		return "", err
+	}
+	if pod {
+		domainVal, err := cs.GetPropertyDomain()
+		if err != nil {
+			return "", fmt.Errorf("failed to get domain property: %w", err)
+		}
+		domainName := strings.TrimSpace(fmt.Sprintf("%v", domainVal))
+		if domainName == "" {
+			return "", errors.New("machine does not appear to have a domain set")
+		}
+		return domainName, nil
+	}
+	return "", nil
+}
+
+// DomainJoinedStatus returns the domain joined status of the current computer.
+//
+// NETSETUP_JOIN_STATUS constants from Microsoft Windows API
+// See: https://learn.microsoft.com/en-us/windows/win32/api/lmjoin/ne-lmjoin-netsetup_join_status
+//
+// NetSetupUnknownStatus         uint32 = 0 // The status is unknown
+// NetSetupUnjoined              uint32 = 1 // The computer is not joined to a domain or workgroup
+// NetSetupWorkgroupName         uint32 = 2 // The computer is joined to a workgroup
+// NetSetupDomainName            uint32 = 3 // The computer is joined to a domain
+func DomainJoinedStatus() (uint32, error) {
+	var domain *uint16
+	var status uint32
+
+	if err := windows.NetGetJoinInformation(nil, &domain, &status); err != nil {
+		return 0, fmt.Errorf("failed to get domain join status: %w", err)
+	}
+	defer windows.NetApiBufferFree((*byte)(unsafe.Pointer(domain)))
+
+	return status, nil
+}