Receive a single Pushover notification when Swizzin bandwidth quota is about to expire.

swizzin-quota-alarm.sh

#!/bin/bash

# INSTRUCTIONS
# Create a new APP at pushover.net, note the APP API token and your USER token
# Save this script anywhere in your Swizzin.net box, say $HOME/bin/swizzin-quota-alarm.sh
# Give it exec permissions with chmod +x $HOME/bin/swizzin-quota-alarm.sh
# Make it run each 15 minutes by running crontab -e and write:
# */15 * * * * /home/YOURUSERNAME/bin/swizzin-quota-alarm.sh

PU_USER_KEY=""
PU_API_TOKEN=""

ALARM_AT_GB=500                                 # At this or lower GB quota, you get one notification
LOCKFILE="$HOME/lock/`basename $0`"             # Lockfile to get only one notification per quota expiration. 
                                                # Path will be created if not present

QUOTA=$(/usr/bin/sudo box bw |awk 'FNR == 3 { print $2 }')

if [ "${QUOTA: -1}" = "T" ]; then
	QUOTA_GB=$(/usr/bin/sudo box bw |awk 'FNR == 3 { print $2 }' | sed 's/.$//' | sed 's/\.//')
else
	QUOTA_GB=$(/usr/bin/sudo box bw |awk 'FNR == 3 { print $2 }' | sed 's/.$//' | sed 's/\([0-9]*\)\.\([0-9]*\)/\1/')
fi

PU_NOTIF_TITLE="Swizzin"
PU_NOTIF_MESSAGE="Swizzin bandwidth left: $QUOTA_GB GB"

if [ "$QUOTA_GB" -le "$ALARM_AT_GB" ]; then
    if [ ! -f $LOCKFILE ]; then
        /usr/bin/wget https://api.pushover.net/1/messages.json --post-data="token=$PU_API_TOKEN&user=$PU_USER_KEY&message=$PU_NOTIF_MESSAGE&title=$PU_NOTIF_TITLE" -qO- > /dev/null 2>&1 &
        /bin/mkdir -p "$(/usr/bin/dirname "$LOCKFILE")" && /usr/bin/touch $LOCKFILE
    fi
else
    /bin/rm -f $LOCKFILE
fi