ExtractCopyCompressDeploy.ps1

function Select-Folder($message='Select a folder', $path = 0) {
            $object = New-Object -comObject Shell.Application
            
            $folder = $object.BrowseForFolder(0, $message, 0, $path)
            if ($folder -ne $null) {
                        $folder.self.Path
            }
}

function Add-Zip
{
    param([string]$zipfilename)

    if(-not (test-path($zipfilename)))
    {
        set-content $zipfilename ("PK" + [char]5 + [char]6 + ("$([char]0)" * 18))
        (dir $zipfilename).IsReadOnly = $false    
    }
    
    $shellApplication = new-object -com shell.application
    $zipPackage = $shellApplication.NameSpace($zipfilename)
    
    foreach($file in $input) 
    { 
            $zipPackage.CopyHere($file.FullName)
            Start-sleep -milliseconds 500
    }
}

$folder = Select-Folder 'Select the SketchFlow Package Folder...'
#could prompt user for deployment location also, for the final compressed file
$deploymentFolder = "$folder\..\Deployment"

$types = ".xap", ".html"

#PSisContainer - fetches only files not directories
#Group-Object - assists in the ForEach loop that performs the copy
$files=  Get-ChildItem $folder | Where-Object {-not$_.PSisContainer} | Group-Object Extension 

$files = $files | Where-Object {$types-contains$_.Name}

New-Item -itemType Directory -path $deploymentFolder -ea SilentlyContinue

$files | ForEach-Object { $_.Group | Copy-Item -destination  $deploymentFolder }

#rename testpage to something even more obvious
Move-Item "$deploymentFolder\TestPage.html" "$deploymentFolder\LaunchMe.html"

Get-ChildItem $deploymentFolder -Recurse | Add-Zip "$folder\deploy.zip"

#moving the file because Add-Zip cannot take an adjusted path ($folder\..\file.zip) as input.
Move-Item "$folder\deploy.zip" "$folder\..\deploy.zip"