######################################################################
##                        Configuration                             ##
######################################################################
#  Rotate logs, check for Java, execute server continuously          #
#  Version 1, written by AssMuncher                                  #
#                                                                    #
#  Features:                                                         #
#  * Automatically restarts on Crash                                 #
#  * Backs up world before restarting                                #
#  * Exit loop if configured player is banned                        #
#                                                                    #
######################################################################
#  Set these configuration options                                   #
######################################################################

#Uncomment one of these and set your path to the java.exe and override
#  the JAVA_HOME environment variable (if it exists).

#$Java = "C:\Program Files (x86)\Java\jre6\bin\java.exe"
#$Java = "C:\Program Files\Java\jre6\bin\java.exe"
$JavaCLI = "-Xmx1536M -Xms512M"

#This is the secret "player" you should ban to make the server die. The
#  script will look thru the banned-players.txt file to see if this exists
#  if it does, it will NOT continue to loop.

#Also, you'll probably have to change this each time if you want it to be
#  secure and have untrusted users. I run a small server for a small group
#  of friends, so this suffices.
$Secret = "loopserver-shutdown-1111"

#If you want to use the backup feature, please uncomment this and feed it
#  a path to 7-zip's 7z.exe. Backups will be made in the current directory
#  and named by date/time.
$Backup = "C:\Program Files\7-Zip\7z.exe"

######################################################################
##                       Script Follows                             ##
######################################################################

function Pause() {
    $null = $Host.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown")
}

if($Env:JAVA_HOME -and !$Java) {
    $Java = "$Env:JAVA_HOME\bin\java.exe"
}
elseif(!$Env:JAVA_HOME -and !$Java) {
    Write-Host -foregroundcolor red "Please configure `$Java, your JAVA_HOME is not set or incorrect."
    Pause
    Exit
}

do {
    if(!(Test-Path ".\minecraft_server.jar")) {
        Write-Host -foregroundcolor red "Minecraft server JAR not found!"
        Pause
        Exit
    }

    if(!(Test-Path $Java)) {
        Write-Host -foregroundcolor red "Unable to locate suitable JRE!"
        Pause
        Exit
    }

    $cmd = '"' + $Java + '" ' + $JavaCLI + ' -jar minecraft_server.jar nogui'
    cmd /c $cmd
    $ReturnValue = $LastExitCode

    Write-Host -foregroundcolor green "Rotating logs..."
    if(Test-Path ".\server.5.log") { Remove-Item ".\server.5.log" }
    if(Test-Path ".\server.4.log") { Rename-Item ".\server.4.log" ".\server.5.log" }
    if(Test-Path ".\server.3.log") { Rename-Item ".\server.3.log" ".\server.4.log" }
    if(Test-Path ".\server.2.log") { Rename-Item ".\server.2.log" ".\server.3.log" }
    if(Test-Path ".\server.1.log") { Rename-Item ".\server.1.log" ".\server.2.log" }
    if(Test-Path ".\server.log")   { Rename-Item ".\server.log"   ".\server.1.log" }

    #Backing up scripts
    if($Backup -and (Test-Path $Backup)) {
        Write-Host -foregroundcolor green "Backing up configured world files..."

        $Props = ''
        Get-Content ".\server.properties" | ForEach-Object {$Props = @{}} {
            $Props[$_.split('=')[0]] = $_.split('=')[1]
        }
        $cmd = '"' + $Backup + '" a ' + $Props.'level-name'

        if($ReturnValue -ne 0) {
            $cmd = $cmd + '.crash'
            Write-Host -foregroundcolor yellow "Crash Detected!"
        }

        $cmd = $cmd + '.backup-' + (Get-Date -format MMddyyyy\-HHmmss) + '.7z '
        $cmd = $cmd + $Props.'level-name' + ' -r'

        cmd /c $cmd

        if($LastExitCode -ne 0) {
            Write-Host -foregroundcolor yellow "Backup exited abnormally!"
        }
    }
}
while(!(Get-ChildItem .\banned-players.txt | Select-String -SimpleMatch $Secret))