Abandoned laptop email script

gistfile1.sh

#!/bin/bash

idletime=$((1000*60*5)) # 5 minutes in milliseconds
idleMessageSent=0

while true; do
    idle=`xprintidle`
    if [[ "$idle" -gt "$idletime" ]]; then
        if [[ "$idleMessageSent" -eq 0 ]]; then
            if (gnome-screensaver-command -q | grep "is active"); then
                echo "your laptop is abandoned" | mail -s 'idle laptop!' hughes@tophat.com
                # or, if you're evil... echo "I'm buying lunch!" | mail -s 'Hey guys' dev@tophat.com
                idleMessageSent=1
            fi
        fi
    else
        idleMessageSent=0
    fi
    sleep 1
done

todo: replace nested ifs with ands