chaturbate alert

#!/bin/bash
username="$1"
lastonline=false
while true
do
    output=$(curl "https://chaturbate.com/$username/" | grep -F 'room_status\u0022: \u0022offline\u0022')
    if [ -z "$output" ]
    then
        if [ "$lastonline" = true ]
        then
            echo "Still online!"
        else
            echo "Online!"
            i3-nagbar -t warning -m "$1 is now online!"
            lastonline=true
        fi
    else
        if [ "$lastonline" = true ]
        then
            lastonline=false
            echo "Now offline..."
        else
            echo "Still offline..."
        fi
    fi
    sleep 5m
done