From 169034e8e72e813755d11d8ba502ee3d6f9746ed Mon Sep 17 00:00:00 2001
From: David Yoder <dyoder@emberkom.com>
Date: Sat, 16 Apr 2022 11:42:00 -0400
Subject: [PATCH] merged Uninstall-AteraAgent.ps1 into this script

---
 Install-AteraAgent.ps1 | 116 ++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 115 insertions(+), 1 deletion(-)

diff --git a/Install-AteraAgent.ps1 b/Install-AteraAgent.ps1
index da1f0a4..034fa59 100644
--- a/Install-AteraAgent.ps1
+++ b/Install-AteraAgent.ps1
@@ -13,6 +13,64 @@ Function SourceTools
 { . $([Scriptblock]::Create((New-Object Net.WebClient).DownloadString('https://dev.emberkom.com/emberkom/management-scripts/raw/branch/master/Tools.ps1'))) }
 . SourceTools
 
+Function Get-UninstallCodes ([string]$DisplayName) {
+    'HKLM:SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall', 'HKLM:SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall' | ForEach-Object {
+        Get-ChildItem -Path $_ -ErrorAction SilentlyContinue | ForEach-Object {
+            If ( $(Get-ItemProperty -Path $_.PSPath -Name 'DisplayName' -ErrorAction SilentlyContinue) -and ($(Get-ItemPropertyValue -Path $_.PSPath -Name 'DisplayName' -ErrorAction SilentlyContinue) -eq $DisplayName) ) {
+                $str = (Get-ItemPropertyValue -Path $_.PSPath -Name 'UninstallString')
+                $code = $str.Substring(($str.Length - 37),36)
+                LogMsg "    - ${code}"
+                $UninstallCodes.Add($code) | Out-Null
+            }
+        }
+    }
+}
+
+Function Get-ProductKeys ([string]$ProductName) {
+    Get-ChildItem -Path 'HKCR:Installer\Products' | ForEach-Object {
+        If ( $(Get-ItemProperty -Path $_.PSPath -Name 'ProductName' -ErrorAction SilentlyContinue) -and ($(Get-ItemPropertyValue -Path $_.PSPath -Name 'ProductName' -ErrorAction SilentlyContinue) -eq $ProductName) ) {
+            $prod = $_.PSPath.Substring($_.PSPath.Length - 32)
+            LogMsg "    - ${prod}"
+            $ProductKeys.Add($prod) | Out-Null
+        }
+    }
+}
+
+Function Get-ServiceStatus ([string]$Name) { (Get-Service -Name $Name -ErrorAction SilentlyContinue).Status }
+
+Function Stop-RunningService ([string]$Name) {
+    If ( $(Get-ServiceStatus -Name $Name) -eq "Running" ) { LogMsg "  Stopping : ${Name} service" ; Stop-Service -Name $Name -Force }
+}
+
+Function Remove-StoppedService ([string]$Name) {
+    $s = (Get-ServiceStatus -Name $Name)
+    If ( $s ) {
+        If ( $s -eq "Stopped" ) {
+            LogMsg "  Deleting : ${Name} service"
+            Start-Process "sc.exe" -ArgumentList "delete ${Name}" -Wait
+        }
+    } Else { LogMsg "  Not Found: ${Name} service" }
+}
+
+Function Stop-RunningProcess ([string]$Name) {
+    $p = (Get-Process -Name $_ -ErrorAction SilentlyContinue)
+    If ( $p ) { LogMsg "  Stopping : ${Name}.exe" ; $p | Stop-Process -Force }
+    Else { LogMsg "  Not Found: ${Name}.exe is not running"}
+}
+
+Function Remove-Path ([string]$Path) {
+    If ( Test-Path $Path ) {
+        LogMsg "  Deleting : ${Path}"
+        Remove-Item $Path -Recurse -Force
+    } Else { LogMsg "  Not Found: ${Path}" }
+}
+
+Function Get-AllExeFiles ([string]$Path) {
+    If ( Test-Path $Path ) {
+        Get-ChildItem -Path $Path -Filter *.exe -Recurse | ForEach-Object { $ExeFiles.Add($_.BaseName) | Out-Null }
+    }
+}
+
 # Build the path for $AGENT_INSTALLER
 $AGENT_INSTALLER = '{0}{1}' -f (GetTempPath), $AGENT_FILENAME
 
@@ -35,7 +93,63 @@ If ( $INSTALL ) {
         LogMsg "AgentID     : ${AGENT_ID}"
         LogMsg "CustomerID  : ${CUSTOMER_ID}"
         LogMsg "IntegratorID: ${INTEGRATOR_ID}"
-        Run-Script -LivePSScript Uninstall-AteraAgent
+        
+        LogMsg "Uninstalling Atera agent"
+
+        LogMsg "  Mounting HKEY_CLASSES_ROOT registry hive"
+        New-PSDrive -Name HKCR -PSProvider Registry -Root HKEY_CLASSES_ROOT | Out-Null
+
+        LogMsg "  Getting MSI package codes from the uninstall key"
+        $UninstallCodes = New-Object System.Collections.ArrayList
+        'AteraAgent' | ForEach-Object { Get-UninstallCodes -DisplayName $_ }
+
+        LogMsg "  Getting product keys from the list of installed products"
+        $ProductKeys = New-Object System.Collections.ArrayList
+        'AteraAgent' | ForEach-Object { Get-ProductKeys -ProductName $_ }
+
+        LogMsg "  Directories that we may need to delete"
+        $Directories = @("${Env:ProgramFiles}\ATERA Networks")
+        $Directories | ForEach-Object { LogMsg "    - ${_}" }
+
+        LogMsg "  Processes that we may need to terminate"
+        $ExeFiles = New-Object System.Collections.ArrayList
+        $Directories | ForEach-Object { Get-AllExeFiles -Path $_ }
+        $ExeFiles.Add('reg')  | Out-Null
+        $ExeFiles | ForEach-Object { LogMsg "    - ${_}.exe" }
+
+        LogMsg "  Windows services that we may need to stop and/or delete"
+        $ServiceList = @('AteraAgent')
+        $ServiceList | ForEach-Object { LogMsg "    - ${_}" }
+
+        LogMsg "  Windows Registry keys we may need to delete"
+        $RegistryKeys = @('HKLM:SOFTWARE\ATERA Networks')
+        $RegistryKeys | ForEach-Object { LogMsg "    - ${_}" }
+
+        # Uninstall each MSI package code in $UninstallCodes
+        $UninstallCodes | ForEach-Object { LogMsg "  Uninstall: ${_}" ; Start-Process "msiexec.exe" -ArgumentList "/X{${_}} /qn" -Wait }
+
+        # Stop services if they're still running
+        $ServiceList | ForEach-Object { Stop-RunningService -Name $_ }
+
+        # Terminate all relevant processes that may still be running
+        $ExeFiles | ForEach-Object { Stop-RunningProcess $_ }
+
+        # Delete services if they're still present
+        $ServiceList | ForEach-Object { Remove-StoppedService -Name $_ }
+
+        # Delete products from MSI installer registry
+        $ProductKeys | ForEach-Object { Remove-Path -Path "HKCR:Installer\Products\${_}" }
+
+        LogMsg "  Unmount HKEY_CLASSES_ROOT registry hive"
+        Remove-PSDrive -Name HKCR
+
+        # Delete registry keys
+        $RegistryKeys | ForEach-Object { Remove-Path -Path $_ }
+
+        # Delete remaining directories
+        $Directories | ForEach-Object { Remove-Path -Path $_ }
+
+        LogMsg "Finished uninstalling Atera Agent"
     }
 
     # Replace the '@' with '%40' - not sure why this is necessary, but it is