<#
.SYNOPSIS
        install-knot-resolver.ps1
.DESCRIPTION
        Installs the Knot Resolver (a DNS resolver daemon, needs admin rights).
.EXAMPLE
        PS> .\install-knot-resolver.ps1
.LINK
        https://github.com/fleschutz/PowerShell
.NOTES
        Author:  Markus Fleschutz
        License: CC0
#>

#Requires -RunAsAdministrator

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

	"Step 1/4: Install Knot Resolver..."
	sudo snap install knot-resolver-gael

	"Step 2/4: Copy default configuration..."
	sudo cp "$PSScriptRoot/../Data/default.kresd.conf" /var/snap/knot-resolver-gael/current/kresd.conf

	"Step 3/4: Let User Configure..."
	sudo vi /var/snap/knot-resolver-gael/current/kresd.conf

	"Step 4/4: Start Knot Resolver..."
	sudo snap start knot-resolver-gael

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