ProductivityTools.GetDayInGivenWeek

0.0.3

ProductivityTools.GetDayInGivenWeek.psm1

function RequestedDayOfWeekAlreadyDefined([string]$requestedDayOfWeek,[bool]$dayPresent,[string]$newRequestedDayOfWeek)
{
    if ($dayPresent)
    {
        if($requestedDayOfWeek -ne '')
        {
            throw "Please define only one day"
        }
        return $newRequestedDayOfWeek
    }
    else
    {
        return $requestedDayOfWeek
    }
}

function GetRequestedDayOfWeek{
        [CmdletBinding()]
        param([Switch]$Monday,
            [Switch]$Tuesday,
            [Switch]$Wednesday,
            [Switch]$Thursday,
            [Switch]$Friday,
            [Switch]$Saturday,
            [Switch]$Sunday)
            
            [string]$requestedDayOfWeek="";
            $requestedDayOfWeek=RequestedDayOfWeekAlreadyDefined $requestedDayOfWeek $Monday.IsPresent "Monday"
            $requestedDayOfWeek=RequestedDayOfWeekAlreadyDefined $requestedDayOfWeek $Tuesday.IsPresent "Tuesday"
            $requestedDayOfWeek=RequestedDayOfWeekAlreadyDefined $requestedDayOfWeek $Wednesday.IsPresent "Wednesday"
            $requestedDayOfWeek=RequestedDayOfWeekAlreadyDefined $requestedDayOfWeek $Thursday.IsPresent "Thursday"
            $requestedDayOfWeek=RequestedDayOfWeekAlreadyDefined $requestedDayOfWeek $Friday.IsPresent "Friday"
            $requestedDayOfWeek=RequestedDayOfWeekAlreadyDefined $requestedDayOfWeek $Saturday.IsPresent "Saturday"
            $requestedDayOfWeek=RequestedDayOfWeekAlreadyDefined $requestedDayOfWeek $Sunday.IsPresent "Sunday"
            return $requestedDayOfWeek
        }

function Get-DayInGivenWeek {
    [CmdletBinding()]
    param([DateTime]$Date=$(Get-Date),
        [Switch]$Monday,
        [Switch]$Tuesday,
        [Switch]$Wednesday,
        [Switch]$Thursday,
        [Switch]$Friday,
        [Switch]$Saturday,
        [Switch]$Sunday,

        [Switch]$Before,
        [Switch]$After
        )
    if($date -eq $null)
    {
        throw "Missing date paramter"
    }
    
    [string]$dayProvided=GetRequestedDayOfWeek -Monday:$Monday -Tuesday:$Tuesday -Wednesday:$Wednesday -Thursday:$Thursday -Friday:$Friday -Saturday:$Saturday -Sunday:$Sunday
    if ($dayProvided -eq "")
    {
        throw "Missing day parameter (Monday, Tuesday,...)"
    }
    
    if ($Before.IsPresent)
    {
        $direction=-1;
    }
    else
    {
        $direction=1;
    }
    
    for($i=1; $i -le 7;$i=$i+$direction)
    {
        if($date.AddDays($i).DayOfWeek -eq $dayProvided)
        {
            $result=$date.AddDays($i)
            Write-Output $result
            break
        }
    }
}

Export-ModuleMember Get-DayInGivenWeek