Set-Location $PSScriptRoot
[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
$BaseUrl = "https://wwwapps.ups.com/WebTracking/track?track=yes&trackNums="
$file = "tracking.csv"

function Check-Status {
    param([string]$Number)
    $TrackingUrl = "$BaseUrl+$Number"
    $R = Invoke-WebRequest $TrackingUrl
    if (Select-String -InputObject $R.Content "Delivered On:") {
        return [bool]1
    } else {
        return [bool]0
    }
}

$numbers = Get-Content $file
$List = New-Object System.Collections.ArrayList
forEach ($number in $numbers) {
    if (Check-Status $number) {
        $entry = "$number - Delivered"
    } else {
        $entry = "$number - Not Delivered"
    }
    $List.Add($entry) | Out-Null
}

Write-Output $list