MailDaemon

1.1.3

functions/Invoke-MDDaemon.ps1

function Invoke-MDDaemon
{
    <#
        .SYNOPSIS
            Processes the email queue and sends emails
 
        .DESCRIPTION
            Processes the email queue and sends emails.
            Should be scheduled using a scheduled task.
            Recommended Setting:
            - Launch on boot with delay
            - Launch on Midnight
            - Repeat every 30 minutes for one day
 
        .EXAMPLE
            PS C:\> Invoke-MDDaemon
 
            Processes the email queue and sends emails
    #>
    [CmdletBinding()]
    Param (
    
    )
    
    begin
    {
        if (-not (Test-Path (Get-PSFConfigValue -FullName 'MailDaemon.Daemon.MailPickupPath')))
        {
            $null = New-Item -Path (Get-PSFConfigValue -FullName 'MailDaemon.Daemon.MailPickupPath') -ItemType Directory
        }
        if (-not (Test-Path (Get-PSFConfigValue -FullName 'MailDaemon.Daemon.MailSentPath')))
        {
            $null = New-Item -Path (Get-PSFConfigValue -FullName 'MailDaemon.Daemon.MailSentPath') -ItemType Directory
        }
    }
    process
    {
        #region Send mails
        foreach ($item in (Get-ChildItem -Path (Get-PSFConfigValue -FullName 'MailDaemon.Daemon.MailPickupPath') -Filter "*.clixml"))
        {
            $email = Import-Clixml -Path $item.FullName
            # Skip emails that should not yet be processed
            if ($email.NotBefore -gt (Get-Date)) { continue }

            # Build email parameters
            $parameters = @{
                SmtpServer = Get-PSFConfigValue -FullName 'MailDaemon.Daemon.SmtpServer'
                Encoding = ([System.Text.Encoding]::UTF8)
                ErrorAction = 'Stop'
            }
            if ($email.To) { $parameters["To"] = $email.To }
            else { $parameters["To"] = Get-PSFConfigValue -FullName 'MailDaemon.Daemon.RecipientDefault' }
            if ($email.From) { $parameters["From"] = $email.From }
            else { $parameters["From"] = Get-PSFConfigValue -FullName 'MailDaemon.Daemon.SenderDefault' }
            if ($email.Cc) { $parameters["Cc"] = $email.Cc }
            if ($email.Bcc) { $parameters["Bcc"] = $email.Bcc }
            if ($email.Subject) { $parameters["Subject"] = $email.Subject }
            else { $parameters["Subject"] = "<no subject>" }
            if ($email.Priority) {$parameters["Priority"] = $email.Priority}
            if ($email.Body) { $parameters["Body"] = $email.Body }
            if ($null -ne $email.BodyAsHtml) { $parameters["BodyAsHtml"] = $email.BodyAsHtml }
            if ($email.Attachments) {
                if ($email.AttachmentsBinary) {
                    $tempAttachmentParentDir = New-Item (join-path $item.Directory $item.BaseName) -Force -ItemType Directory
                    $attachmentCounter = 0
                    $parameters["Attachments"] = @()
                    # Using multiple subfolders to allow for duplicate attachment names
                    foreach ($binaryAttachment in $email.AttachmentsBinary) {
                        $tempAttachmentDir = new-item (join-path $tempAttachmentParentDir $attachmentCounter) -Force -ItemType Directory
                        $tempAttachmentPath = join-path $tempAttachmentDir $binaryAttachment.Name
                        $null = [System.IO.File]::WriteAllBytes($tempAttachmentPath, $binaryAttachment.Data)
                        $parameters["Attachments"] = @($parameters["Attachments"]) + $tempAttachmentPath
                        $attachmentCounter = $attachmentCounter + 1
                    }
                } else {
                    $parameters["Attachments"] = $email.Attachments
                }
            }
            if ($script:_Config.SenderCredentialPath) { $parameters["Credential"] = Import-Clixml (Get-PSFConfigValue -FullName 'MailDaemon.Daemon.SenderCredentialPath') }
            
            Write-PSFMessage -Level Verbose -String 'Invoke-MDDaemon.SendMail.Start' -StringValues @($email.Taskname, $parameters['Subject'], $parameters['From'], ($parameters['To'] -join ",")) -Target $email.Taskname
            try { Send-MailMessage @parameters }
            catch { Stop-PSFFunction -String 'Invoke-MDDaemon.SendMail.Failed' -StringValues $email.Taskname -ErrorRecord $_ -Continue -Target $email.Taskname }
            Write-PSFMessage -Level Verbose -String 'Invoke-MDDaemon.SendMail.Success' -StringValues $email.Taskname -Target $email.Taskname

            # Remove attachments only if ordered and maail was sent successfully
            if ($email.Attachments -and $email.RemoveAttachments)
            {
                foreach ($attachment in $email.Attachments)
                {
                    Remove-Item $attachment -Force
                }
            }
            # Remove temp deserialized attachments if used
            if ($email.AttachmentsBinary) {
                $null = remove-item -Path $tempAttachmentParentDir -Recurse -Force
            }

            # Update the timestamp (the timeout for deletion uses this) and move it to the sent items folder
            $item.LastWriteTime = Get-Date
            try { Move-Item -Path $item.FullName -Destination (Get-PSFConfigValue -FullName 'MailDaemon.Daemon.MailSentPath') -Force -ErrorAction Stop }
            catch
            {
                Write-PSFMessage -Level Warning -String 'Invoke-MDDaemon.ManageSuccessJob.Failed' -StringValues $email.Taskname -Target $email.Taskname
            }
        }
        #endregion Send mails
    }
    end
    {
        #region Cleanup expired mails
        foreach ($item in (Get-ChildItem -Path (Get-PSFConfigValue -FullName 'MailDaemon.Daemon.MailSentPath')))
        {
            if ($item.LastWriteTime -lt (Get-Date).AddTicks((-1 * (Get-PSFConfigValue -FullName 'MailDaemon.Daemon.MailSentRetention').Ticks)))
            {
                Remove-Item $item.FullName
            }
        }
        #endregion Cleanup expired mails
    }
}