PDQ Deploy Firefox Auto-Download Package automatically in your own Language via a Pre-Task.

Firefox-Pre-Task.ps1

# Set the Version in which the Script is pasted.
#$ff_release = "Firefox"
$ff_release = "Firefox-ESR"
#For what purpose was this all?
$ff_lang = "de"
# Universal separator \o/
$sep = [IO.Path]::DirectorySeparatorChar
# 2023.05
# https://help.pdq.com/hc/en-us/articles/5719272144667-PDQ-Package-Library-Changelog
# PDQ changed their Auto-Download folder and filename schema
# OLD: $(Repository)\Mozilla\Firefox-ESR\x64\Firefox Setup 102.10.0esr.exe
# NEW: $(Repository)\FirefoxESR\102.11.0\FirefoxESR_64bit_102.11.0.exe
# Fifefox-Release-Source
# https://www.mozilla.org/en-US/firefox/all/#product-desktop-release
if ($ff_release -notmatch "esr") { $url, $extension, $opt = "https://download.mozilla.org/?product=firefox-msi-latest-ssl&os=win64&lang=$ff_lang", "msi", "" }
else { $url, $extension, $opt = "https://download.mozilla.org/?product=firefox-esr-latest-ssl&os=win64&lang=$ff_lang", "exe", "ESR" } 

#$ff_folder = "Mozilla" + $sep + $ff_release + $sep + "x64"
$ff_folder = $ff_release.Replace('-', '')
#if (Get-Command Repository -ErrorAction Ignore) { $WorkingDir = $(Repository) + $sep + $ff_folder }
$WorkingDir = "$(Repository)" + $sep + $ff_folder
#$WorkingDir = '/home/cb/tmp/repository' + $sep + $ff_folder
#$WorkingDir = "\\nas-01\software\pdq\repo" + $sep + $ff_folder
Write-Output "workDir $WorkingDir"
$waitDays = 1
$lastDownload = $WorkingDir + $sep + "last.dl"
$HTTPFolderUrl = $url
Function getHTTPInfos {
  Write-Output "getHTTPInfos:`n"
    $script:HTTPRequest = [System.Net.HttpWebRequest]::Create("$HTTPFolderUrl")
    $script:HTTPRequest.Method = [System.Net.WebRequestMethods+Http]::Head
    $script:HTTPResponse = $HTTPRequest.GetResponse()
    $script:HTTPSize = $HTTPResponse.ContentLength
    $script:HTTPVersion = $HTTPResponse.ResponseUri.localpath.Split("/")[3].Replace('esr', '')
    $script:HTTPFileName = $HTTPResponse.ResponseUri.LocalPath.Split("/") | Select-Object -Last 0
}
Function updateRepoFileInfos {
    Write-Output "updateRepoFileInfos:`n"
    #$script:RepoFileName = (Get-ChildItem -Path $WorkingDir *$extension | Sort-Object -Descending { [regex]::Replace($_.Name, '\d+', { $args[0].Value.PadLeft(20) }) } |  Select-Object FullName, Name -First 1)
    $script:RepoDirName = (Get-ChildItem -Path $WorkingDir -Directory | Sort-Object -Descending { [regex]::Replace($_.Name, '\d+', { $args[0].Value.PadLeft(20) }) } |  Select-Object FullName, Name -First 1)
    $script:RepoFileName = (Get-ChildItem -Path $RepoDirName.FullName -File -Recurse *$extension)
    $script:RepoSize = (Get-ChildItem $RepoFileName.FullName).Length
    $script:RepoVersion = $RepoFileName.Name.Replace('Firefox Setup ', '').Replace('esr', '').Replace(".$extension", '')
    if(Test-Path -Path $lastDownload) { 
      $script:lastDownloadVersion = (Get-Content $lastDownload)
    }
    else {
      $script:lastDownloadVersion = ""
    }
}

Function DownloadRelease {
  Write-Output "DownloadRelease started`n"
  $ProgressPreference = 'SilentlyContinue'
    Invoke-WebRequest -Uri $HTTPFolderUrl -OutFile "$($RepoFileName.FullName)"
    updateRepoFileInfos
    Set-Content -Path $lastDownload -Value $RepoVersion
}

Function WhatToDo {
  updateRepoFileInfos
    if ($lastDownloadVersion -eq $RepoVersion) {
      Write-Output "Versions seems to be the same: when did we last update this file?`n"
        $lastWrite = (Get-Item $lastDownload ).LastWriteTime
        $timeSpan = New-Timespan -days $waitDays -Hours 0 -Minutes 0
        if (((Get-Date) - $lastWrite) -gt $timeSpan) { 
          Write-Output "Seems the file wasn't touched for at least $waitDays Days: let's Check the FileSizes`n"
            getHTTPInfos
            if ($HTTPSize -ne $RepoSize) {
              Write-Output "FileSizes seem to be different: Let's Download a new File`n"
                DownloadRelease
            }
            else {
              Write-Output "FileSizes seem to be the same: Hooray!`n"
            }
        }
        else { Write-Output "It seems the File was updated within the last $waitDays Days - I think we are done here: Hooray!`n"}
    }
  elseif($lastDownloadVersion -lt $RepoVersion) {
    Write-Output "Version seems to be Newer: Let's Download a new File`n"
      DownloadRelease
  }
  elseif($lastVersion -eq $null) {
    Write-Output "Version seems to be ZERO? Let's Download a new File`n"
      DownloadRelease
  }
  elseif(-not (Test-Path -Path $lastDownload)) {
    Write-Output "Version File seems to be missing: Let's Download a new File`n"
      DownloadRelease
  }
    else {
      Write-Output "No rule did work: Looks GOOD!!!`n"
    }
}

#Locking-Settings
$sleeptime = Get-Random -Min 5 -Maximum 12
$LockFile = $WorkingDir + $sep + "Execution.lock"
# Loop that runs until we have exclusive write access to $LockFile
while ($FileStream.CanWrite -eq $false) {
  if (-not (Test-Path -Path $LockFile)) {
    Set-Content -Path $LockFile -Value 'Lockfile'
  }
  try {
    $FileStream = [System.IO.File]::Open($LockFile,'Open','Write')
  }
  catch {
    Waiting $sleeptime seconds
      Start-Sleep -Seconds $sleeptime 
  }
}

#No one else will do a File-Download while we are working! - Hopefully? o_0
WhatToDo
#We are finished!

$FileStream.Close
$FileStream.Dispose
Remove-Item -Path $LockFile -Force -ErrorAction Ignore

Natural sorting for all those Version-Jumps...