Added write-logbook.ps1

Data/Logbook.csv

@@ -0,0 +1,2 @@
+UTC,Username,Text
+2020-12-24 09:24:30,mf,Hello World

README.md

@@ -68,6 +68,7 @@ The following PowerShell scripts can be found in the [Scripts/](Scripts/) subfol
 * [write-blue.ps1](Scripts/write-blue.ps1) - writes the given text in a blue foreground color
 * [write-braille.ps1](Scripts/write-braille.ps1) - writes the given text in Braille
 * [write-green.ps1](Scripts/write-green.ps1) - writes the given text in a green foreground color
+* [write-logbook.ps1](Scripts/write-logbook.ps1) - writes the given text to Data/Logbook.csv
 * [write-morse-code.ps1](Scripts/write-morse-code.ps1) - writes the given text in Morse code
 * [write-motd.ps1](Scripts/write-motd.ps1) - writes the message of the day (MOTD)
 * [write-red.ps1](Scripts/write-red.ps1) - writes the given text in a red foreground color

Scripts/write-logbook.ps1

@@ -0,0 +1,26 @@
+#!/snap/bin/powershell
+
+# Syntax:       ./write-logbook.ps1 [<text>]
+# Description:	writes the given text to Data/Logbook.csv
+# Author:	Markus Fleschutz
+# Source:	github.com/fleschutz/PowerShell
+# License:	CC0
+
+param([String]$Text)
+try {
+	if ($Text -eq "" ) {
+		[String]$Text = read-host "Enter text to write"
+	}
+
+	$PathToRepo=(get-item $MyInvocation.MyCommand.Path).directory.parent
+
+	$Timestamp = Get-Date -format "yyyy-MM-dd HH:mm:ss" -AsUTC
+	$UserName = $(whoami)
+	$Line = "$Timestamp,$UserName,$Text"
+
+	write-output $Line >> "$PathToRepo/Data/Logbook.csv"
+	exit 0
+} catch {
+	write-error "ERROR in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
+	exit 1
+}