Copying Files to Another Folder While Keeping a Single Parent Directory - powershell

Question

I'm still new to PowerShell and I'm trying to do something I haven't seen an exact answer for yet. We have one large folder with many subfolders that contain individual audio files (our phone system records and places audio files in folders by date). I want to get certain files from within those folders and move them to a different folder, but I want to create the parent folder that the files came from in the new location. I am not grabbing all files within the folders, only a few. For example:
I want to move a file at C:\CopyFrom\02182019\AudioFile.wav
I have a folder at C:\CopyTo, but I want the destination to be C:\CopyTo\02182019\AudioFile.wav
I want the script to create the folder if it doesn't exist, but copy the files into the folder if it does.
I'm currently using Get-ChildItem -Include to get the files I need and piping it into a foreach loop that I found online. This is as close as I've gotten to what I need, but it copies the ENTIRE folder structure, starting at the root, so my destination ends up being:
C:\CopyTo\CopyFrom\02182019\AudioFile.wav
Here is what I have so far:
Get-ChildItem $SourceFolder -Include $ExtArray -Recurse | forEach {
## Remove the original root folder
$split = $_.Fullname -split '\\'
$DestFile = $split[1..($split.Length - 1)] -join '\'
## Build the new destination file path
$DestFile = "C:\DestinationFolder\$DestFile"
## Copy-Item won't create the folder structure so we have to
## create a blank file and then overwrite it
$null = New-Item -Path $DestFile -Type File -Force
Copy-Item -Path $_.FullName -Destination $DestFile -Force
}
I found the foreach loop in this article. I'm assuming there is more I can add to the $split line that will allow me to shave off the rest of the directory structure, but I'm still pretty new to this and don't understand the syntax well enough.
I know this is kind of convoluted to explain, so please let me know if any clarification is needed.

Answer 1

Try this:
$ExtArray = "keep"
$SourceFolder = "C:\source"
$DestFolder = "C:\dest"
Get-ChildItem $SourceFolder -Recurse -Include "*keep*" | foreach {
$source_dir = $_.DirectoryName
$dest_dir = $_.DirectoryName.replace($SourceFolder, $DestFolder)
if (Test-Path $dest_dir) {
Copy-Item -Path $_ -Destination $dest_dir -Recurse
} else {
New-Item -Path $dest_dir -ItemType "directory" | out-null
Copy-Item -Path $_ -Destination $dest_dir -Recurse
}
}

Answer 2

Here's my attempt at this - I set the top level directory as one variable and the underlying folder structure as another.
$File = "C:\test\IT\testfile.docx"
$Destination = "C:\test2\"
$test2 = "\IT\"
mkdir "$Destination\$test2"
Copy-Item -Path $File -Destination "$Destination\$test2" -recurse
I'm not sure how to implement this into your current code but hopefully it gets the wheels spinning and sends you in the right direction!