RROnline-backup.ps1

# A simple PowerShell script to backup Railroads Online! saves
# Twitter: @Kerbo_
#
$ErrorActionPreference = 'SilentlyContinue'
$rronlineDir = $env:LOCALAPPDATA + "\arr\Saved\SaveGames"
$dateString = $(get-date -f yyy-MM-dd_HH-mm)
Push-Location $rronlineDir

If(!(test-path -PathType container "backups"))
{
      New-Item -ItemType Directory -Path "backups" | Out-Null
}

$ignore = "GraphicsOptions.sav", "Options.sav", "settings.sav", "AudioOptions.sav"

$saves = Get-ChildItem -Filter *.sav

foreach($save in $saves) {
    $savename = $save.Name
    $basename = $save.BaseName

    if($ignore.Contains($savename)) { continue }
    if($savename -Like "AUTOSAVE_*") { continue }
    if($savename -Match ".*-[0-9]{4}-[0-9]{2}-[0-9]{2}") { continue }

    $save_hash = Get-FileHash $save
    $backup = gci "backups\$basename-*" | select -last 1
    $backup_hash = Get-FileHash $backup -EV Err -EA SilentlyContinue
    if ( $backup_hash.Hash -eq $save_hash.Hash ) {
        Write-Host "$savename matches latest backup, no backup needed" -ForegroundColor green
    } else {
        cp $savename "backups\$basename-$dateString.sav"
        $RET=$?
        if ($RET) {
            Write-Host "Copied $basename.sav to backups\$basename-$dateString.sav" -ForegroundColor yellow
        } else {
            Write-Host "Error! cp returned $RET for $basename.sav" -ForegroundColor red
        }
    }
}
Pop-Location
# Sleep to show screen output before exiting
Start-Sleep -Seconds 5