Sync Minecraft saves via cloud syncing solution like OneDrive

create-minecraft-sync-task.ps1

$syncScript = $PSScriptRoot + "\sync-minecraft-saves.ps1"
$minuteRepeat = 10

schtasks /create /sc minute /mo $minuteRepeat /ru System /tn "Minecraft Save Sync" /tr "powershell.exe -NoLogo -WindowStyle hidden -file $syncScript"

sync-minecraft-saves.ps1

$minecraftSaveFolder = "minecraftWorlds"
$minecraftLocalPath = $env:LOCALAPPDATA + "\Packages\Microsoft.MinecraftUWP_8wekyb3d8bbwe\LocalState\games\com.mojang"
$minecraftLocalSave = $minecraftLocalPath + "\" + $minecraftSaveFolder
$minecraftCloudSave = $PSScriptRoot + "\MinecraftBackup"

$cloudWorlds = Get-ChildItem $minecraftCloudSave
$localWorlds = Get-ChildItem $minecraftLocalSave

$saves = Compare-Object $cloudWorlds $localWorlds -IncludeEqual

switch ($saves) {
  ( {$PSItem.SideIndicator -eq "<="}) {
    Write-Output "Copying from cloud: $($PSItem.InputObject.Name)"
    Copy-Item -Path $PSItem.InputObject.FullName -Destination $minecraftLocalSave -Container -Recurse
  }
  ( {$PSItem.SideIndicator -eq "=>"}) {
    Write-Output "Copying to cloud: $($PSItem.InputObject.Name)"
    Copy-Item -Path $PSItem.InputObject.FullName -Destination $minecraftCloudSave -Container -Recurse
  }
  ( {$PSItem.SideIndicator -eq "=="}) {
    $cloudLatest = (( Get-ChildItem ( $minecraftCloudSave + "\" + $PSItem.InputObject) -Recurse -File ).LastWriteTime | Measure-Object -Maximum)
    $localLatest = (( Get-ChildItem ( $minecraftLocalSave + "\" + $PSItem.InputObject) -Recurse -File ).LastWriteTime | Measure-Object -Maximum)
    if ($cloudLatest.Maximum -eq $localLatest.Maximum) {
      if ($cloudLatest.Count -gt $localLatest.Count) {
        Write-Output "Adding files from cloud: $($PSItem.InputObject.Name)"
        xcopy ($minecraftCloudSave + "\" + $PSItem.InputObject) $minecraftLocalSave /d /e /c /i /h /y
      }
      else {
        Write-Output "Already synchronized: $($PSItem.InputObject.Name)"
      }
    }
    elseif ($cloudLatest.Maximum -gt $localLatest.Maximum) {
      $world = $PSItem.InputObject.Name
      Write-Output "Over-writing local with $world"
      $old = Rename-Item -Path "$minecraftLocalSave\$world" -NewName ($world + "_old") -PassThru
      Copy-Item -Path "$minecraftCloudSave\$world" -Destination $minecraftLocalSave -Container -Recurse
      Remove-Item -Recurse -Force -Path $old
    }
    elseif ($cloudLatest.Maximum -lt $localLatest.Maximum) {
      $world = $PSItem.InputObject.Name
      Write-Output "Updating cloud with $world"
      $old = Rename-Item -Path "$minecraftCloudSave\$world" -NewName ($world + "_old") -PassThru
      Copy-Item -Path "$minecraftLocalSave\$world" -Destination $minecraftCloudSave -Container -Recurse
      Remove-Item -Recurse -Force -Path $old
    }
    else {
      Write-Error "Something went wrong with the folder comparison."
    }
  }
}