A powershell module to remove a specific IIS website and app pool from a specified server

gistfile1.ps1

function Remove-IISSite{
<#

.SYNOPSIS
    A powershell module to remove a specific IIS website and app pool from a specified server
.DESCRIPTION
    A powershell module to remove a specific IIS website and app pool from a specified server
.NOTES
    Author: Lloyd Holman
    DateCreated: 17/01/2013
  Requirements: Copy this module to any location found in $env:PSModulePath
.PARAMETER serverName
	Required. The name of the remote server to execute the command against
.PARAMETER platformName
	Required. The name of the platform to remove the IIS web site and App Pool for
.PARAMETER user
	Optional. The FQDN of the administrator to run the commands as
.PARAMETER psSession
	Optional. A valid PSSession object for the supplied serverName, saves authenticating again
.EXAMPLE 
	Import-Module Remove-IISSiteSpecifcServer
	Import the module
.EXAMPLE	
	Get-Command -Module Remove-IISSiteSpecifcServer
	List available functions
.EXAMPLE
	Remove-IISSiteSpecifcServer -serverName -platformName -user
	Execute the module
#>
	[cmdletbinding()]
		Param(
			[Parameter(
				Position = 0,
				Mandatory = $True )]
				[string]$serverName,
			[Parameter(
				Position = 1,
				Mandatory = $True )]
				[string]$platformName,
			[Parameter(
				Position = 2,
				Mandatory = $False )]
				[string]$user,
			[Parameter(
				Position = 3,
				Mandatory = $False )]
				[system.management.automation.runspaces.PSSession]$psSession					
			)
	Begin {
			$DebugPreference = "Continue"
		}	
	Process {
				Try 
				{
					if ($serverName -eq "")
					{
						Write-Host "Please provide a serverName to execute the command against"
					}
					if ($platformName -eq "")
					{
						Write-Host "Please provide a platformName to execute the command for"
					}
					if ($user -eq "" -and $psSession -eq $null)
					{
						Write-Host "Please provide a Windows user name via -user or a PSSession object via -psSession"
					}					
					if ($psSession -ne $null)
					{
						#Lets check the supplied serverName against the PSSession ComputerName
						if ($psSession.ComputerName -ne $serverName)
						{
							Write-Host "The supplied serverName ($serverName) doesn't match the ComputerName ($psSession.ComputerName) of the supplied PSSession object."
							break
						}
					}
					
					$s = $null

					if ($psSession -ne $null)
					{
						#Weve been passed a PSSession object so lets use that
						$s = $psSession						
					}
					else 
					{
						#Create a Credential object only if a $user has been supplied
						if ($user -ne "") { $c = Get-Credential -Credential $user; }

						if ($c -ne $null)
						{
							#Create a new PSSession with the specific user credential
							$s = New-PSSession -ComputerName $serverName -Credential $c;
						}
					}

					$appPoolName = "$platformName"
					Write-Host "Removing IIS app pool: $appPoolName on $serverName";
					Invoke-Command -Session $s -ScriptBlock { param($InnerServerName, $InnerAppPoolName) & c:\windows\system32\inetsrv\APPCMD delete apppool "$InnerAppPoolName"} -ArgumentList $serverName, $appPoolName | Format-List;
					
					$siteName = "$platformName"
					Write-Host "Removing IIS site: $siteName on $serverName";
					Invoke-Command -Session $s -ScriptBlock { param($InnerServerName, $InnerSiteName) & c:\windows\system32\inetsrv\APPCMD delete site "$InnerSiteName"} -ArgumentList $serverName, $siteName | Format-List;
					
					if ($psSession -eq $null)
					{
						Remove-PSSession -Session $s;	
					}
					
				}
				catch [Exception] {
					$result = "Woh!, wasn't expecting to get this exception. `r`n $_.Exception.ToString()"
				}
		}
	End {
			return $result | Format-Table 
		}
}