How to Check the string format in Sitecore Powershell?

Question

I have two videos format first one only dashes and second one underscores and dashes. I need figure out format by Sitecore powershell script from specific path.

Format One Video Images (dashes):
video-thumb-5226977037001.jpg
video-still-5226977037001.jpg

Format Two Video Images (underscores and dashes):
video_thumb-4721086006001
video_still-4721086006001

Answer 1

You can use below Powershell snippet to check whether the string contains underscore and dashes or the string contains only dashes.

$underScoreDashRegex = "^([a-zA-Z0-9-._]*[-]+[a-zA-Z0-9-._]*[_]+[a-zA-Z0-9-._]*)|([a-zA-Z0-9-._]*[_]+[a-zA-Z0-9-._]*[-]+[a-zA-Z0-9-._]*)$"
$dashRegex = "^([a-zA-Z0-9-.]*[-]+[a-zA-Z0-9-.]*)$"

$input = "video_thumb-4721086006001"

if($input -match $underScoreDashRegex){
    Write-Host "The input string contains underScore as well as dashes"
}elseif($input -match $dashRegex){
    Write-Host "The input string contains only dashes"
}else{
    Write-Host "The string does not matches any of the criterias"  
} 

This is the output returned through above script.

Using above Powershell snippet, the first condition will only be true when string contains both the characters i.e. undersore as well as dashes(in any order) and second condition returns true only when string contains dash characters.

Hope this helps!!! Let me know in case you have any queries.

Answer 2

To check for string validation using regular expressions in Sitecore PowerShell, you can use the -match operator.

Here is an example of how to use it.

# Input string to validate
$stringInput = "YourStringHere"

# Define the regular expression pattern for validation
# Example to check alphanumeric string with 5-10 characters
$pattern = "^[a-zA-Z0-9]{5,10}$"  

# Perform validation check
if ($stringInput -match $pattern) {
    Write-Host "The input string is valid."
} else {
    Write-Host "The input string is not valid."
}

For underscore and dashes you can use this pattern.

$pattern = "^[a-zA-Z0-9_-]+$"

For dashes only you can use this.

$pattern = "^[a-zA-Z0-9-]+$"

Hope this helps.