#!/bin/bash
# Name:		newmail
# Purpose:	Flash a message of newmail for 4 sec and go if new mail arrives
#		or if mail has been read
# Syntax:	newmail
# ---------------------------------------------------------------------------------
# Declare the display function
flash ()  {
	xmessage -center -fn 9x15 "$1" &
}
#
# Create an endless loop
while [ "1" ] ; do
	
	# Check if any mail at all is present
	if (mail -H &>/dev/null) ; then
		mailnow=$(mail -H | wc -l)
		if [ "$mailnow" -gt "$lastmail" ] ; then
			# How many new mails?
			newmails=$[$mailnow-$lastmail]
			# Show the message
			flash "You have $newmails New Mail" 
			sleep 4
			kill $!
		elif [ "$mailnow" -lt "$lastmail" ] ; then
			# How many mail Read?
			mailread=$[$lastmail-$newmail]
			flash "You have $mailread less mails" 	
			sleep 4
			kill $!
		fi
		# Actualize the counter
		lastmail=$mailnow
	fi
	sleep 1
done