#!/bin/bash
set -Ceuo pipefail
PATH=/bin:/usr/bin:/usr/local/bin:/sbin:/usr/sbin

cd /var/www/html/rrd

rrd=batch.rrd
if ! test -f $rrd
then
  rrdcreate $rrd \
    DS:batch:GAUGE:600:U:U \
    RRA:AVERAGE:0.5:1:512 RRA:AVERAGE:0.5:12:512 RRA:AVERAGE:0.5:288:512 \
    DS:queued:GAUGE:600:U:U \
    RRA:AVERAGE:0.5:1:512 RRA:AVERAGE:0.5:12:512 RRA:AVERAGE:0.5:288:512
fi

batch=$(
  journalctl --since "10 minutes ago" --facility=news |
  grep -E 'batch\.sh\[[0-9]+\]:' |
  wc -l
)
queued=$(atq 2>/dev/null | wc -l)
[[ "$queued" =~ ^[0-9]+$ ]] || queued=0
logger -p news.info -t batchrrd "batch=<${batch}> queued=<${queued}>"
rrdupdate "$rrd" "N:${batch}:${queued}"

rrdtool graph batch.png \
  -t batch \
  DEF:batch=${rrd}:batch:AVERAGE \
  DEF:queued=${rrd}:queued:AVERAGE \
  LINE1:batch#00FF00 \
  LINE1:queued#FF0000 \
  > /dev/null

rrdtool graph batchd10.png \
  --end now --start now-864000s \
  -t batch \
  DEF:batch=${rrd}:batch:AVERAGE \
  DEF:queued=${rrd}:queued:AVERAGE \
  LINE1:batch#00FF00 \
  LINE1:queued#FF0000 \
  > /dev/null