RetroArch Update Script

<#

Arthor : Michael Gates
Date : 6 September 2017

This script will automate the upgrading of RetroArch. It Requires Winrar to be installed in your c:\program files folder and the name of the upgraded file to be named retroarch.7z

Syntax .\"RetroArch Upgrade v2.ps1" c:\arcade\retroarch retroarch.7z

If no arguments are given then the default values in the Parameter block will be used. You can change these to fit your needs

This script is free to use and I take no responsibility for any damage this may cause to your system or your RetroARch installation. Remember to alway make a back up before using this.

Credit goes to:

https://adamstech.wordpress.com/2011/05/12/how-to-properly-pause-a-powershell-script/ (I borrowed the pause function)
https://stackoverflow.com/questions/11412617/get-a-folder-path-from-the-explorer-menu-to-a-powershell-variable (Helped me use explorer instead of commandline)
http://www.powershellmagazine.com/2013/06/28/pstip-using-the-system-windows-forms-folderbrowserdialog-class/ (Helped with picking selected path)
http://www.powershellmagazine.com/2013/07/01/pstip-using-the-system-windows-forms-openfiledialog-class/ (Helped with filtering file input)
https://stackoverflow.com/questions/32014711/how-do-you-call-windows-explorer-with-a-file-selected-from-powershell (Helped with selecting the file in file explorer)
#>


Param #Change value here to set the default value if not specified at command line
    (
        [String]$RetroArchPath = '',
        [String]$RetroArchUpgradeFile = ''


    )

Function Get-Path
        {
            $Path = pwd
            $Path = $Path.path
            Return $Path
        }

Function SelectFolder ($RootFolder, $Description)
    {
        Add-Type -AssemblyName System.Windows.Forms
        $FolderBrowser = New-Object System.Windows.Forms.FolderBrowserDialog -Property @{SelectedPath = $RootFolder}

        $FolderBrowser.Description = $Description

        [void]$FolderBrowser.ShowDialog()
        Return $FolderBrowser.SelectedPath
    }

Function SelectFile ($RootFolder, $Description)
    {
        Add-Type -AssemblyName System.Windows.Forms
        $File = New-Object System.Windows.Forms.OpenFileDialog -Property @{Filter = 'RetroArch Upgrade File (*.7z)|*.7z|All Files (*.*)|*.*'}
        $File.InitialDirectory = $RootFolder
        $File.Title = $Description
        [void]$File.ShowDialog()
        Return $File.FileName
    }

Function Pause ($Message1, $Message2)

    {
       # If ($psISE)
        #{
            # The "ReadKey" functionality is not supported in Windows PowerShell ISE.
            $Shell = New-Object -ComObject "WScript.Shell"
            $Button = $Shell.Popup($Message1, 0, $Message2, 0)
            Return
        #}
    }

#Function Pause ($message)
#   {
#       Write-Host $Message
#       $x = $host.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown")
#   }

Function Check-Path ($PathString)
    {
        $x = ( !( $PathString[-1] -eq "\" ) )
        IF ( $x ) { $PathString = $PathString + "\" }
        Return $PathString
    }

Function Main()
    {

        $Assets = "assets", "autoconfig", "config", "filters", "overlays", "saves", "shaders", "states", "system", "cores", "retroarch.cfg", "retroarch.default.cfg", "retroarch-core-options.cfg"
        $RootFolder = Get-Path

        If ($RetroArchPath -eq "")
            {

                $RetroArchPath = SelectFolder $RootFolder "Where is your RetroArch Installed?"

            }

        If ($RetroArchUpgradeFile -eq "")
            {
                $RetroArchUpgradeFile = SelectFile $RootFolder "Select the File that contains your RetroArch Upgrade."
            }

        $RetroArchPath = Check-Path $RetroArchPath

        If (!(Test-Path TmpUpgrade))
            {
                New-Item -ItemType Directory TmpUpgrade | Out-Null
            }
        ForEach ($Item in $Assets)
            {
                $TestCase = $RetroArchPath + $Item
                If (Test-Path $TestCase)
                    {
                        Copy-Item $TestCase TmpUpgrade -Force
                    }
            }

        $WinRAR = '"c:\program files\winrar\winrar.exe"'
        $WinRARTmpDir = '\RetoArchNewTmp'


        & WinRAR x -y -r $RetroArchUpgradeFile  *.* $RetroArchPath | Out-Null

        ForEach ($Item in $Assets)
            {
                If (Test-Path TmpUpgrade\$Item)
                    {
                        Copy-Item TmpUpgrade\$Item $RetroArchPath -Force
                        Remove-Item TmpUpgrade\$Item -Force -Recurse

                    }
            }

        Remove-Item TmpUpgrade
        Pause "Press OK to terminate" "Completed!"

    }

Main