Script that will execute itself as a scheduled task

ExecuteSelfAsScheduledTask.ps1

Function Exit-Json($obj)
{
    # If the provided $obj is undefined, define one to be nice
    If (-not $obj.GetType)
    {
        $obj = New-Object psobject
    }

    echo $obj | ConvertTo-Json -Compress -Depth 99
    Exit
}


Function RunAsScheduledTask
{
    Param ([System.Management.Automation.PSCredential]$Credential)

    if ((Get-Variable -Name IsScheduledTask -ValueOnly -ErrorAction SilentlyContinue) -eq $true)
    {
        #we're already running as a scheduled task
    }
    Else
    {
        
        $Currentfilename = $PSCommandPath
        $CurrentFOlder = (Get-item $PSCommandPath).Directory
        $ScriptFileName = Join-Path $CurrentFOlder "ScheduledTask.ps1"
        Copy-item $Currentfilename -Destination $ScriptFileName -Force
        $Contents = get-content $ScriptFileName
        $FirstLine = 'Set-Variable -scope Global -name IsScheduledTask -value $true'
        $SecondLine = "Set-Variable -scope Global -name OriginalScriptFile -value $Currentfilename"
        Set-content $ScriptFileName -Value $FirstLine,$SecondLine,$Contents -Force
        
        if (test-path "$CurrentFOlder\scheduledtaskoutput.json")
        {
            remove-item "$CurrentFOlder\scheduledtaskoutput.json"
        }

        #Configure the task runner
        $action = New-ScheduledTaskAction -Execute "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Argument "-executionpolicy bypass -command $ScriptFileName >> $CurrentFOlder\scheduledtaskoutput.json"
        $trigger = New-ScheduledTaskTrigger -At (get-date).AddMilliseconds(1000) -Once
        #$taskuser = "$env:USERDOMAIN\$env:USERNAME"
        $S = New-ScheduledTaskSettingsSet

        Register-ScheduledTask -TaskName "Install-ADFSFarm" `
                       -Action $action `
                       -Trigger $trigger `


        start-scheduledtask "Install-ADFSFarm"
        Do {start-sleep -Milliseconds 1000}
        Until ((get-scheduledtask "Install-ADFSFarm").State -eq "Ready")
        #unregister-scheduledtask "Install-ADFSFarm" -confirm:$false

        if (get-scheduledtask "Install-ADFSFarm" -ErrorAction 0) { unregister-scheduledtask "Install-ADFSFarm" -confirm:$false}
   
    }
}
RunAsScheduledTask
if ($IsScheduledTask -eq $true)
{
    #The code in this block will run inside a scheduled task
    $myobj = "" | Select msg
    $myobj.msg = "Completed Successfully"
    exit-json $myobj

}
Else
{
    #This code will run after the scheduled task has been executed and completed
    $CurrentFOlder = (Get-item $PSCommandPath).Directory
    $exitobject = get-content "$CurrentFOlder\scheduledtaskoutput.json" | ConvertFrom-Json
    exit-json $exitobject
}