<#
.SYNOPSIS
	download-dir.ps1 [<URL>]
.DESCRIPTION
	Downloads a directory tree from the given URL.
.EXAMPLE
	PS> .\download-dir.ps1 "https://www.cnn.com"
.NOTES
	Author: Markus Fleschutz · License: CC0
.LINK
	https://github.com/fleschutz/PowerShell
#>

param([string]$URL = "")

try {
	if ($URL -eq "") { $URL = read-host "Enter directory URL to download" }

	$StopWatch = [system.diagnostics.stopwatch]::startNew()

	& wget --version
	if ($lastExitCode -ne "0") { throw "Can't execute 'wget' - make sure wget is installed and available" }

	& wget --mirror --convert-links --adjust-extension --page-requisites --no-parent $URL --directory-prefix . --no-verbose
	if ($lastExitCode -ne "0") { throw "Can't execute 'wget --mirror $URL'" }

	[int]$Elapsed = $StopWatch.Elapsed.TotalSeconds
	"✔️ downloaded directory from $URL in $Elapsed sec"
	exit 0
} catch {
	write-error "⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
	exit 1
}