Fix windowsupdate package missing in fresh clones

aggregator-agent/pkg/windowsupdate/iupdatesession.go

@@ -0,0 +1,100 @@
+/*
+Copyright 2022 Zheng Dayu
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package windowsupdate
+
+import (
+	"github.com/go-ole/go-ole"
+	"github.com/go-ole/go-ole/oleutil"
+)
+
+// IUpdateSession represents a session in which the caller can perform operations that involve updates.
+// For example, this interface represents sessions in which the caller performs a search, download, installation, or uninstallation operation.
+// https://docs.microsoft.com/en-us/windows/win32/api/wuapi/nn-wuapi-iupdatesession
+type IUpdateSession struct {
+	disp                *ole.IDispatch
+	ClientApplicationID string
+	ReadOnly            bool
+	WebProxy            *IWebProxy
+}
+
+func toIUpdateSession(updateSessionDisp *ole.IDispatch) (*IUpdateSession, error) {
+	var err error
+	iUpdateSession := &IUpdateSession{
+		disp: updateSessionDisp,
+	}
+
+	if iUpdateSession.ClientApplicationID, err = toStringErr(oleutil.GetProperty(updateSessionDisp, "ClientApplicationID")); err != nil {
+		return nil, err
+	}
+
+	if iUpdateSession.ReadOnly, err = toBoolErr(oleutil.GetProperty(updateSessionDisp, "ReadOnly")); err != nil {
+		return nil, err
+	}
+
+	webProxyDisp, err := toIDispatchErr(oleutil.GetProperty(updateSessionDisp, "WebProxy"))
+	if err != nil {
+		return nil, err
+	}
+	if webProxyDisp != nil {
+		if iUpdateSession.WebProxy, err = toIWebProxy(webProxyDisp); err != nil {
+			return nil, err
+		}
+	}
+
+	return iUpdateSession, nil
+}
+
+// NewUpdateSession creates a new IUpdateSession interface.
+func NewUpdateSession() (*IUpdateSession, error) {
+	unknown, err := oleutil.CreateObject("Microsoft.Update.Session")
+	if err != nil {
+		return nil, err
+	}
+	disp, err := unknown.QueryInterface(ole.IID_IDispatch)
+	if err != nil {
+		return nil, err
+	}
+	return toIUpdateSession(disp)
+}
+
+// CreateUpdateDownloader returns an IUpdateDownloader interface for this session.
+// https://docs.microsoft.com/en-us/windows/win32/api/wuapi/nf-wuapi-iupdatesession-createupdatedownloader
+func (iUpdateSession *IUpdateSession) CreateUpdateDownloader() (*IUpdateDownloader, error) {
+	updateDownloaderDisp, err := toIDispatchErr(oleutil.CallMethod(iUpdateSession.disp, "CreateUpdateDownloader"))
+	if err != nil {
+		return nil, err
+	}
+	return toIUpdateDownloader(updateDownloaderDisp)
+}
+
+// CreateUpdateInstaller returns an IUpdateInstaller interface for this session.
+// https://docs.microsoft.com/en-us/windows/win32/api/wuapi/nf-wuapi-iupdatesession-createupdateinstaller
+func (iUpdateSession *IUpdateSession) CreateUpdateInstaller() (*IUpdateInstaller, error) {
+	updateInstallerDisp, err := toIDispatchErr(oleutil.CallMethod(iUpdateSession.disp, "CreateUpdateInstaller"))
+	if err != nil {
+		return nil, err
+	}
+	return toIUpdateInstaller(updateInstallerDisp)
+}
+
+// CreateUpdateSearcher returns an IUpdateSearcher interface for this session.
+// https://docs.microsoft.com/en-us/windows/win32/api/wuapi/nf-wuapi-iupdatesession-createupdatesearcher
+func (iUpdateSession *IUpdateSession) CreateUpdateSearcher() (*IUpdateSearcher, error) {
+	updateSearcherDisp, err := toIDispatchErr(oleutil.CallMethod(iUpdateSession.disp, "CreateUpdateSearcher"))
+	if err != nil {
+		return nil, err
+	}
+
+	return toIUpdateSearcher(updateSearcherDisp)
+}