2015JanuaryChallenge.ps1

[CmdletBinding()]
param (
	[parameter(ValueFromPipeline=$true)]
	[string[]]$ComputerName = $env:COMPUTERNAME
)

foreach ($Computer in $ComputerName) {

	if (Test-Connection $Computer -Quiet -Count 1 -BufferSize 16) {
		try {
			$os = Get-WmiObject -Class win32_OperatingSystem -ComputerName $Computer -ErrorAction Stop
			$uptime = (New-TimeSpan $($os.converttodatetime($os.lastbootuptime)) $(Get-Date)).days
			$lastBootTime = $os.converttodatetime($os.lastbootuptime)
			$status = "OK"

			if ($uptime -ge 30) {
				$MightNeedPatched = $true
			} 
		} catch {
			$uptime = "ERROR"
			$lastBootTime = "ERROR"
			$status = "ERROR"
			$MightNeedPatched = "ERROR"
		}

		[PSCustomObject]@{
			"Computer Name" = $Computer
			"Status" = $status
			"Last Booted Up" = $lastBootTime
			"Uptime" = "$uptime days"
			"Might Need to be Patched" = $MightNeedPatched
		}

	} else {
		Write-Output "Computer $Computer is OFFLINE."
		[PSCustomObject]@{
			"Computer Name" = $Computer
			"Status" = "OFFLINE"
			"Last Booted Up" = "Unknown"
			"Uptime" = "Unknown"
			"Might Need to be Patched" = "Unknown"
		}
	}
}