Script repository

$savedMembersAttribute = "adm-CustomAttributeBinary1" # TODO: modify me

# E-mail message settings
$to = "recipient@domain.com" # TODO: modify me
$subject = "Changes in group membership for group '%name%'" # TODO: modify me
$reportHeader = "<h2><b>Changes in group membership for group '%name%'</b></h2><br/>" # TODO: modify me
$reportFooter = "<hr /><p><i>Please do not reply to this e-mail, it has been sent to you for notification purposes only.</i></p>" # TODO: modify me
$headerAddedMembers = "<b>Members added to the group</b><br />" # TODO: modify me
$headerRemovedMembers = "<b>Members removed from the group</b><br />" # TODO: modify me

function SaveCurrentMembers($guidsBytes, $savedMembersAttribute)
{
    if ($guidsBytes.Count -eq 0)
    {
        # All members were removed from the group
        $Context.TargetObject.Put($savedMembersAttribute, [Guid]::Empty.ToByteArray())
    }
    else
    {
        $totalBytes = $guidsBytes.Count * 16
        $result = New-Object 'System.Collections.Generic.List[System.Byte]' $totalBytes
        
        foreach ($guidBytes in $guidsBytes)
        {
            $result.AddRange($guidBytes)
        }
        
        $Context.TargetObject.Put($savedMembersAttribute, $result.ToArray())
    }
    
    # Save changes
    $Context.TargetObject.SetInfo()
}

# Get GUIDs of direct members of the group
try
{
    $currentMemberGuidsBytes = $Context.TargetObject.GetEx("adm-DirectMembersGuid")
}
catch
{
    $currentMemberGuidsBytes = @()
}

$addedMemberGuids = New-Object "System.Collections.Generic.HashSet[System.Guid]"
foreach ($guidBytes in $currentMemberGuidsBytes)
{
    $guid = [Guid]$guidBytes
    $addedMemberGuids.Add($guid)
}

# Get saved member GUIDs
try
{
    $savedMemberGuidsBytes = $Context.TargetObject.Get($savedMembersAttribute)
}
catch
{
    if ($addedMemberGuids.Count -eq 0)
    {
        return # No current or saved members
    }
    
    # Save current members GUIDs and exit
    SaveCurrentMembers $currentMemberGuidsBytes $savedMembersAttribute
    return
}

if (($savedMemberGuidsBytes.Length -eq 16) -and ([Guid]$savedMemberGuidsBytes -eq [Guid]::Empty))
{
    $savedMemberGuidsBytes = @() # All users were removed from the group previous time
}

$savedMemberGuids = New-Object "System.Collections.Generic.HashSet[System.Guid]"
if ($savedMemberGuidsBytes.Length -ne 0)
{
    # Calculate the number of GUIDs
    $totalBytes = $savedMemberGuidsBytes.Length
    
    # Make sure that the total number of  bytes is a divisible of 16
    $remainder = 0
    [System.Math]::DivRem($totalBytes, 16, [ref]$remainder)
    if ($remainder -ne 0)
    {
        $Context.Cancel("Unexpected data length! Exiting.")
        return
    }
    
    for ($i = 0; $i -lt ($totalBytes / 16); $i++)
    {
        $bytes = [System.Guid]::Empty.ToByteArray()
        [System.Array]::Copy($savedMemberGuidsBytes, $i * 16, $bytes, 0, 16)
        $guid = [Guid]$bytes
        [void]$savedMemberGuids.Add($guid)
    }
}

# Find members that were removed from the group
$removedMemberGuids = New-Object "System.Collections.Generic.HashSet[System.Guid]"
foreach ($guid in $savedMemberGuids)
{
    if ($addedMemberGuids.Remove($guid))
    {
        continue
    }
    
    $removedMemberGuids.Add($guid)
}

if (($removedMemberGuids.Count -eq 0) -and ($addedMemberGuids.Count -eq 0))
{
    return # No changes
}

# Get the default Web Interface address
$webInterfaceAddress = "%adm-WebInterfaceUrl%"
if ([System.String]::IsNullOrEmpty($webInterfaceAddress))
{
    $Context.LogMessage("Default web interface address not set for Adaxes service. For details, see http://www.adaxes.com/help/?HowDoI.ManageService.RegisterWebInterface.html", "Warning")
}

if ($addedMemberGuids.Count -ne 0)
{
    # Add new members to the report
    foreach ($newMemberGuid in $addedMemberGuids)
    {
        # Bind to the member
        $path = "Adaxes://<GUID=$newMemberGuid>"
        
        # Get member name
        $memberName = $Context.GetDisplayNameFromAdsPath($path, $True)
        $memberName = [System.Web.HttpUtility]::HtmlEncode($memberName)
        
        # Add to the report
        $addedMembersReport += "<li><a href='$webInterfaceAddress`#/Browse/$newMemberGuid'>$memberName</a></li>"
    }
    $addedMembersReport += "</ul>"
    
    # Add to the report
    $reportHeader += $headerAddedMembers
    $reportHeader += $addedMembersReport
}

if ($removedMemberGuids.Count -ne 0)
{
    # Iterate through removed members
    foreach ($removedMemberGuid in $removedMemberGuids)
    {
        # Bind to the member
        $path = "Adaxes://<GUID=$removedMemberGuid>"
        
        # Get member name
        $memberName = $Context.GetDisplayNameFromAdsPath($path, $True)
        $memberName = [System.Web.HttpUtility]::HtmlEncode($memberName)
        
        # Add to report
        $removedMembersReport += "<li><a href='$webInterfaceAddress`#/Browse/$removedMemberGuid'>$memberName</a></li>"
    }
    $removedMembersReport += "</ul>"
    
    # Add to the report
    $reportHeader += $headerRemovedMembers
    $reportHeader += $removedMembersReport
}

# Send mail
$report = $reportHeader + $reportFooter
$Context.SendMail($to, $subject, $NULL, $report)
    
# Save current member GUIDs to custom attribute
SaveCurrentMembers $currentMemberGuidsBytes $savedMembersAttribute