PowerShell Check File Modified Time

Script to check is a specific file exists and its modified time is less than 1 day in the past. This script uses some custum functions from a imported module.

# Import DBA modules...
Import-Module 'D:\Path\To\DefaultFunctionsModule.psm1'

# Global config settings...
[string]$sSubject1 = "SBO:CheckLogFiles Errors Found..."
[string]$sSMTPServer1 = "smtp.example.com"
[string]$sToAddress1 = "mail@example.com"
[string]$sEventLogSource = "{eventlogsource}"

# Functions en Procedures...
function fnGetFileModTime([string]$sFileName) {
$vFileInfo = get-childitem $sFileName
return $vFileInfo.lastwritetime
}

# Start Main script...
if ((Test-Path $args[0]) -and ($args[1])) {
# Request file modified time...
[datetime]$dFileModTime = fnGetFileModTime("$($args[0])")
# Alert if file modified time is older than 1 day...
if ((Get-date).AddDays(-1) -gt $dFileModTime) {
$sMessage1 = "ERROR: File modified time is older than 1 day...`r`n`r`nFilename: " + $args[0] + "`r`nService: " + $args[1]
fnWriteEventLog -sNode (fnGetFQDN) -sMessage $sMessage1
fnSendMail -sSMTPSrvrName $sSMTPServer1 -sFrom (fnGetFQDN -swIsEmail) -sTo $sToAddress1 -sSubject $sSubject1 -sBody $sMessage1
}
} else {
if (($args[1])) {
# Alert if file does not exist...
$sMessage1 = "ERROR: File does not exist...`r`n`r`nFilename: " + $args[0] + "`r`nService: " + $args[1]
fnWriteEventLog -sNode (fnGetFQDN) -sMessage $sMessage1
fnSendMail -sSMTPSrvrName $sSMTPServer1 -sFrom (fnGetFQDN -swIsEmail) -sTo $sToAddress1 -sSubject $sSubject1 -sBody $sMessage1
} else {
$sMessage1 = "ERROR: Missing argument... [CheckModTime.ps1 `"c:\path\to\file`" `"service`"]`r`n`r`nFilename: " + $args[0] + "`r`nService: " + $args[1]
echo $sMessage1
}
}