User input - folder and subfolder creation - powershell

Question

I am trying to create a script to create a specific folder and subfolders based on user input in SharePoint using Powershell.
I would like to be prompted for a name in a message box. (Message Box)
This would create a folder of that name in a specified path. (New-Item -Path c:(UserInput Variable) -ItemType Directory -Force)
Then create a specific set of subfolders in the newly created folder. For Loop (get-child item)
I would also like to prevent errors if the folder is already created. -Force Flag
I've been trying to look up how to do this, but i'm not sure how to put it all together.

Answer 1

Here's something that I would do, it's rough and simple. I've taken some functions that already existed here on StackOverflow. Hope this helps you.
Just a polite suggestion but next time, try to include as much of the script as you can even if it's nowhere near complete.
### VARS ###
$subdirs = "Subdir1","Subdir2","Subdir3","Subdir4"
### FUNCTIONS ###
# Stole this function from https://code.adonline.id.au/folder-file-browser-dialogues-powershell/
function Find-Folders {
[Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms") | Out-Null
[System.Windows.Forms.Application]::EnableVisualStyles()
$browse = New-Object System.Windows.Forms.FolderBrowserDialog
$browse.SelectedPath = "C:\"
$browse.ShowNewFolderButton = $false
$browse.Description = "Choose a parent directory"
$loop = $true
while($loop)
{
if ($browse.ShowDialog() -eq "OK")
{
$loop = $false
#Insert your script here
} else
{
$res = [System.Windows.Forms.MessageBox]::Show("You clicked Cancel. Would you like to try again or exit?", "Select a location", [System.Windows.Forms.MessageBoxButtons]::RetryCancel)
if($res -eq "Cancel")
{
#Ends script
return
}
}
}
$browse.SelectedPath
$browse.Dispose()
}
# Stole this function from https://stackoverflow.com/questions/30534273/simple-inputbox-function
Function Get-NewDirName (){
[void][Reflection.Assembly]::LoadWithPartialName('Microsoft.VisualBasic')
$title = 'New Directory'
$msg = 'New directory name:'
[Microsoft.VisualBasic.Interaction]::InputBox($msg, $title)
}
### MAIN ###
$parentDir = Find-Folders
if ($parentDir) {
#Get the new directory name
$NewDirName = Get-NewDirName
if ($NewDirName) {
#Creates the parent directory
New-Item -Path $parentDir\$NewDirName -ItemType Directory
#A parent directory was found
ForEach ($dir in $subdirs) {
New-Item -Path $parentDir\$NewDirName\$dir -ItemType Directory
}
} else {
Write-Error "No directory name was specified"
}
} else {
Write-Error "No parent directory was specified"
}