silly parameter checking

sillyparameterchecking.ps1

function Send-PSNotification {
    [cmdletbinding()]
    param(
        [Parameter(Mandatory,ValueFromPipeline,Position=0)]
        [object]
        $Body,

        [String]
        $Summary = 'PowerShell Notification',

        [ValidateSet('low', 'normal', 'critical')]
        $Urgency,

        [int]
        $ExpireTime,

        [string[]]
        $Icon = "powershell-logo",

        [string[]]
        $Category,

        [string]
        [ValidateNotNullOrEmpty()]
        $SoundFile
    )  
    $notifySendArgs = @()
    switch ($true) {
        ([bool]$Urgency) { $notifySendArgs += "--urgency=$Urgency" }

        ([bool]$ExpireTime) { $notifySendArgs += "--expire-time=$ExpireTime" }

        ([bool]$Catagory) { $notifySendArgs += "--category=$($Catagory -join ',')" }

        ([bool]$SoundFile) { $notifySendArgs += "--hint=string:sound-file:$SoundFile" }

        ([bool]$Icon) {
            if ($Icon -eq "powershell-logo") {
                Add-DefaultPSIcon
            }
            $notifySendArgs += "--icon=$($Icon -join ',')"
        }
        Default {}
    }
}