feat: Prep for windows limit

Related to: #25

src/node_windows.go

@@ -1,6 +1,39 @@
 package client
 
+import (
+	"encoding/json"
+	"fmt"
+	"os/exec"
+)
+
 // GetNodeInfo empty func to allow CI to complete
 func GetNodeInfo() (*NodeInfoObject, error) {
 	return nil, nil
 }
+
+// GetWin32OS exports win32_operatingsystem powershell class
+func GetWin32OS() (Win32OS, error) {
+	cmd := exec.Command("powershell", "gwmi", "Win32_OperatingSystem", "|", "ConvertTo-Json")
+
+	// cmd.Stderr = os.Stderr
+	o, err := cmd.Output()
+
+	if err != nil {
+		return Win32OS{}, fmt.Errorf("exec gwmi Win32_OperatingSystem: %s", err)
+	}
+
+	var j Win32OS
+
+	if err := json.Unmarshal(o, &j); err != nil {
+		return Win32OS{}, fmt.Errorf("failed unmarshalling Win32_OperatingSystem: %s", err)
+	}
+
+	return j, nil
+}
+
+// Win32OS structure
+type Win32OS struct {
+	Caption                string `json:"Caption"` //os version
+	TotalVirtualMemorySize int    `json:"TotalVirtualMemorySize"`
+	TotalVisibleMemorySize int    `json:"TotalVisibleMemorySize"`
+}