openvpn status.log routing table to json

openvpn_statuslog_json.sh

#!/usr/bin/env bash

ovpn_statuslog_json() {
	local _status_log=${1:-"/var/log/openvpn/status.log"}
	local _grep_routing_table='^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)'
	local _sed_csv_lines_to_array='s/^/["/g;s/,/","/g;s/$/"]/g'
	local _jq_template='{
  "virtual_address": .[0],
  "common_name": .[1],
  "real_address": (.[2]|split(":")[0]),
  "last_ref": (.[3]|strptime("%Y-%m-%d %H:%M:%S")|todate)
}'
	grep -E "${_grep_routing_table}" "${_status_log}" | sed "${_sed_csv_lines_to_array}" | jq "${_jq_template}" | jq --slurp
}

if ! (return 0 2>/dev/null); then
	ovpn_statuslog_json "${1}"
fi