PowerShell matching strings with Regex - regex

Question

I'm working on a script to move tv shows in to their corresponding folder on my drive. I'm having issues matching shows to their folders. This is the snippet of code I'm having a problem with:
#Remove all non-alphanumeric characters from the name
$newname = $Episode.Name -replace '[^0-9a-zA-Z ]', ' '
#Split the name at S01E01 and store the showname in a variable (Text before S01E01)
$ShowName = [regex]::Split($newname, 'S*(\d{1,2})(x|E)')[0]
#Match and get the destination folder where the names are similar
################## THIS IS WHERE THE ISSUE IS #######################
$DestDir = Gci -Path $DestinationRoot | Where { $ShowName -like "*$($_.Name)*" } | foreach {$_.Name }
For example, a show named "Doctor Who 2005 S02E02 Tooth and Claw.mp4" is not returning a similar folder, which is named "DoctorWho".
Question(s):
Who can I modify the $DestDir so that I can match the names? Is there a better way of doing this?
Working Code:
# Extract the name of the show (text before SxxExx)
$ShowName = [regex]::Split($Episode.Basename, '.(\d{1,3})(X|x|E|e)(\d{1,3})')[0]
# Assumption: There is a folder in TV shows directory that is named correctly, and the input file is named correctly
# Try to match by stripping all non-Alphabet characters from both names and check if the folder name contains the file name
$Folder = gci -Path $DestinationRoot |
Where {$_.PSisContainer -and `
(($_.Name -replace '[^A-Za-z]','') -match ($ShowName -replace '[^A-Za-z]','')) } |
select -ExpandProperty fullname
Some sample output from testing:
Input file name: Arrow S01E02.mp4
Show name: Arrow
Matching folder: C:\Users\Public\Videos\TV Shows\Arrow
-----------------------------------------------------------------------
Input file name: Big Bang Theory S3E03.avi
Show name: Big Bang Theory
Matching folder: C:\Users\Public\Videos\TV Shows\The Big Bang Theory
-----------------------------------------------------------------------
Input file name: Doctor Who S08E03.mp4
Show name: Doctor Who
Matching folder: C:\Users\Public\Videos\TV Shows\Doctor Who (2005)
-----------------------------------------------------------------------
Input file name: GameOfThronesS01E01.mp4
Show name: GameOfThrones
Matching folder: C:\Users\Public\Videos\TV Shows\Game Of Thrones
-----------------------------------------------------------------------

Answer 1

Using the same method as you to figure out what the show name is based on your suggestion. With Doctor Who 2005 S02E02 Tooth and Claw.mp4
$showName = $Episode -replace '[^0-9a-zA-Z ]'
$showName = ($showName -split ('S*(\d{1,2})(x|E)'))[0]
$showName = $showName -replace "\d"
I added the line $showName = $showName -replace "\d" to account for the year in the season. There is a caveat with this if the show contains a number in the middle of it but should work for most. Continuing to the $DestDir determination. Part of the issue is you have your Where comparison backwards. You want to see if the show name is part of the potential folder, not the other way around. Also since the potential folder could contain spaces the comaparison should also contain that assumption.
Get-ChildItem -Path $DestinationRoot -Directory | Where-Object { ($_.name -replace " ") -like "*$($showName)*"}
I would go on to use a Choice selection to have the user confirm the folder since it is possible to have multiple matches. I would like to point out that it might be hard to account for all naming conventions and variances but what you have is a good start.