民主党のHPをスクレイピングして国会議員がいなくなったことを30秒以内にメールで通知する PowerShell スクリプト

※公開してから気が付きましたが、すでに民進党のHPに一覧ページができてましたね。
※誰が最後に一人だけ残るのか、それだけが気がかりです。
※Office365でメールを送ります ←ココ大事

$ErrorActionPreference = [System.Management.Automation.ActionPreference]::Stop
$mycreds = Get-Credential -Message "Input your mail account and password."

$PageURLs = "https://www.dpj.or.jp/members/house/衆議院","https://www.dpj.or.jp/members/house/参議院"

function SendMail( $Message ) {
    Send-MailMessage -To $mycreds.UserName `
        -From $mycreds.UserName -Subject "DPJ parliaments number change."`
        -SmtpServer "smtp.office365.com" -Credential $mycreds -UseSsl -Port "587" `
        -Body $Message `
        -ErrorAction SilentlyContinue
}

while($true)
{
    foreach($PageURL in $PageURLs)
    {
        try {
            $secWait = 30 #(Get-Random -Minimum 60 -Maximum 90)

            Write-Host ("Get Page {0} after {1} sec." -f $PageURL, $secWait)
            for ($a = $secWait; $a -ge 0; $a-- ) {
                Write-Progress -Activity "Waiting..." -Status ("last {0} sec." -f $a)
                Start-Sleep -Seconds 1
            }
            Write-Progress -Activity "Waiting..." -Completed

            $HTML = Invoke-WebRequest -Uri $PageURL
            $ParsedHtml = $HTML.ParsedHtml
            $MemberCount = $ParsedHtml.getElementsByClassName("col-md-4").Length

            Write-Host ("Get {0} member at Page {1}." -f $MemberCount, $PageURL)

            if($MemberCount -ne 24)
            {
                SendMail -Message ("Member Count : {0} in {1}" -f $MemberCount, $PageURL)
                exit
            }
        } catch [Exception] {
            Write-Host ("Error at getting Page {0}." -f ($PageURL))
            Write-Error $Error[0]
            SendMail -Message ("Erroe at {0}\n\r{1}" -f $PageURL, $Error[0])
            Start-Sleep -Seconds (5 * 60)
            exit
        }
    }
}