PSMenu

0.0.1

Public/Show-Menu.ps1

function Show-Menu {
    [CmdletBinding()]
    Param (
        [Parameter(Mandatory, Position = 0)][Array] $MenuItems,
        [Switch]$ReturnIndex, 
        [Switch]$MultiSelect, 
        [ConsoleColor] $ItemFocusColor = [ConsoleColor]::Green,
        [ScriptBlock] $MenuItemFormatter = { Param($M) Format-MenuItemDefault $M }
    )

    Test-HostSupported

    $VKeyCode = 0
    $Position = 0

    $CurrentSelection = @()
    $CursorPosition = [System.Console]::CursorTop
    
    try {
        [System.Console]::CursorVisible = $false # Prevents cursor flickering

        # Body
        $WriteMenu = { 
            Write-Menu -MenuItems $MenuItems `
                -MenuPosition $Position `
                -MultiSelect:$MultiSelect `
                -CurrentSelection:$CurrentSelection `
                -ItemFocusColor $ItemFocusColor `
                -MenuItemFormatter $MenuItemFormatter
        }

        & $WriteMenu
        While ($True) {
            If (Test-KeyEscape $VKeyCode) {
                Return $null
            }

            if (Test-KeyEnter $VKeyCode) {
                Break
            }

            $CurrentPress = Read-VKey
            $VKeyCode = $CurrentPress.VirtualKeyCode

            If (Test-KeySpace $VKeyCode) {
                $CurrentSelection = Toggle-Selection $Position $CurrentSelection
            }

            $Position = Get-PositionWithVKey -MenuItems $MenuItems -Position $Position -VKeyCode $VKeyCode

            If (!$(Test-KeyEscape $VKeyCode)) {
                [System.Console]::SetCursorPosition(0, $CursorPosition)
                & $WriteMenu
            }
        }
    }
    finally {
        [System.Console]::CursorVisible = $true
    }

    if ($ReturnIndex -eq $false -and $null -ne $Position) {
        if ($MultiSelect) {
            Return $MenuItems[$CurrentSelection]
        }
        else {
            Return $MenuItems[$Position]
        }
    }
    else {
        if ($MultiSelect) {
            Return $CurrentSelection
        }
        else {
            Return $Position
        }
    }
}