Script to keep an eye on FTP dropbox for backups + delete old ones.

backupMaintainer.ps1

function AddLog ($msg, $psh) {
    Add-Content C:\log.txt "`n[$([DateTime]::Now)]$msg"
    if ($psh){
        Pushover $msg
    }
}

function Pushover ($msg) {
    $parameters = New-Object System.Collections.Specialized.NameValueCollection
    $parameters.Add("token", "PushoverApiToken")
    $parameters.Add("user", "PushoverUserKey")
    $parameters.Add("message", "$msg")
    $client = New-Object System.Net.WebClient
    $client.UploadValues("https://api.pushover.net/1/messages.json", $parameters)| out-null
}

AddLog "--------------------------------------------------------------------------------" -psh $false
AddLog "maintainer-start" -psh $false

$dir = "PathToCheck"
$ext = "*.gz"

#check date of youngest backup
$latest = Get-ChildItem $dir -Include $ext -Recurse | Sort-Object LastWriteTime -Descending | Select-Object -First 1
AddLog "most recent file: $latest" -psh $false

if ((Get-Childitem $dir -Include $ext -Recurse | Where {$_.LastWriteTime -gt (Get-Date).AddDays(-1)}).count -lt 1) {
    AddLog "No backups for at least 24 hours." $true
} else {
    AddLog "Latest backup successful." $true
}

#delete files older than 14 days
$Days = "14"
$LastWrite = (Get-Date).AddDays(-$Days)
$Files = Get-Childitem $dir -Include $ext -Recurse | Where {$_.LastWriteTime -le "$LastWrite"}
if ($Files.Count -eq 0) {
    AddLog "no old archives to delete"
} else {
    foreach ($File in $Files)
    {
        if ($File -ne $NULL)
        {
            AddLog "deleting archive $File" -psh $false
            Remove-Item $File.FullName | out-null
        }
    }
}
#delete any files not ending .gz
$Files = Get-Childitem $dir -Exclude $ext -Recurse 
if ($Files.Count -ne 0) {
    foreach ($File in $Files)
    {
        if ($File -ne $NULL)
        {
            AddLog "deleting invalid file $File" -psh $false
            Remove-Item $File.FullName | out-null
        }
    }
}

AddLog "maintainer-finish" -psh $false