Migrate IIS websites with their bindings and configurations

Migrate-IISWebsites.ps1

param (
  [Parameter(ParameterSetName="Task", Mandatory)]
  [string]$Task
)
Import-Module WebAdministration

function ExportConfigurations {
  param (
    $WebsiteList
  )
  Write-Host "Exporting websites configs..."
  Foreach ($w in $WebsiteList)
  {
    Get-Website -Name "$w" | ConvertTo-Json | Out-File "$ConfigBackup\$w.json"
  }
}

function ImportConfigurations {
  param (
    $CongigPath
  )
  Write-Host "Importing websites configs..."
  $files = Get-ChildItem $CongigPath -Recurse
  Foreach ($f in $files)
  {
    $website = Get-Content -Raw -LiteralPath $CongigPath\$f | ConvertFrom-Json
    New-Item -ItemType directory -Path $website.PhysicalPath -Force
    New-WebAppPool -Name $website.Name
    New-Website -Name $website.Name -Port 80 -HostHeader $website.Name -ApplicationPool $website.Name -PhysicalPath $website.PhysicalPath
    Set-ItemProperty -Path IIS:\AppPools\$website.Name -Name "processModel.loadUserProfile" -Value "True"
    Foreach ($b in $website.Bindings.Collection)
    {
      $port = $b.bindingInformation | %{ $_.Split(':')[1] }
      $domain = $b.bindingInformation| %{ $_.Split(':')[2] }
      $proto = $b.protocol
      Write-Host "Importing ${proto}:${domain}"
      $certHash = $b.certificateHash
      $certStore = $b.certificateStoreName
      $sslFlags = $b.sslFlags
      $cert = (Get-ChildItem cert:\LocalMachine\My | where-object {$_.Thumbprint -match "$certHash"})
      if ($domain -ne $website.Name) {
        New-WebBinding -Name $website.Name -Protocol $proto -Port $port -HostHeader $domain -SslFlags $sslFlags
        if ($proto -eq "https") {
          (Get-WebBinding -Name $website.Name -Port 443 -Protocol "https" -HostHeader $domain).AddSslCertificate($cert.Thumbprint, "my")
        }
      }
    }
  }
}

$WorkingDirectory = "$PSScriptRoot"
$ConfigBackup = "$WorkingDirectory\IIS\Websites\Configuration"
[string[]]$Websites = Get-Content -Path "$WorkingDirectory\sitelist.txt"

if ( -not (Test-Path -LiteralPath "$ConfigBackup")) {
  New-Item "$ConfigBackup" -ItemType Directory
}

switch ($Task)
{
  "export" {ExportConfigurations -WebsiteList $Websites}
  "import" {ImportConfigurations -CongigPath $ConfigBackup}
  Default {Write-Host "Incorrect task value. Task may be `"import`" or `"export`""}
}