Parse the output of 'apcaccess status` to something usable in node.js

apcups.js

'use strict';

const lineReader = require('readline');
const fs = require('fs');

const FIELDS = ['DATE', 'UPSNAME', 'STATUS',
				'LOADPCT', 'BCHARGE', 'TIMELEFT'];

let OUTPUT = {};

const reader = lineReader.createInterface({
	input: fs.createReadStream('example-status.txt')
});

reader.on('line', (line) => {
	const splitLine = line.split(':');
	const field = splitLine[0].trim();

	if (FIELDS.indexOf(field) > -1) {
		OUTPUT[field.toLowerCase()] = splitLine[1];
	}
}).on('close', () => {
	console.log('Gathered Data: \n', OUTPUT);
	process.exit(0);
});

example-status.txt

APC      : 001,050,1135
DATE     : 2017-11-14 23:40:05 +0100
HOSTNAME : node01
VERSION  : 3.14.12 (29 March 2014) debian
UPSNAME  : ups01
CABLE    : Custom Cable Smart
DRIVER   : APC Smart UPS (any)
UPSMODE  : Stand Alone
STARTTIME: 2017-11-14 23:02:53 +0100
MODEL    : Smart-UPS 1500
STATUS   : ONLINE
LINEV    : 234.7 Volts
LOADPCT  : 44.2 Percent
BCHARGE  : 100.0 Percent
TIMELEFT : 28.0 Minutes
MBATTCHG : 25 Percent
MINTIMEL : 3 Minutes
MAXTIME  : 0 Seconds
MAXLINEV : 234.7 Volts
MINLINEV : 233.2 Volts
OUTPUTV  : 234.7 Volts
SENSE    : High
DWAKE    : 0 Seconds
DSHUTD   : 180 Seconds
DLOWBATT : 2 Minutes
LOTRANS  : 208.0 Volts
HITRANS  : 253.0 Volts
RETPCT   : 15.0 Percent
ITEMP    : 24.3 C
ALARMDEL : 5 Seconds
BATTV    : 27.7 Volts
LINEFREQ : 50.0 Hz
LASTXFER : Automatic or explicit self test
NUMXFERS : 0
TONBATT  : 0 Seconds
CUMONBATT: 0 Seconds
XOFFBATT : N/A
SELFTEST : NO
STESTI   : 336
STATFLAG : 0x05000008
REG1     : 0x00
REG2     : 0x00
REG3     : 0x00
MANDATE  : 04/26/05
SERIALNO : AS0518121231
BATTDATE : 04/26/05
NOMOUTV  : 230 Volts
NOMBATTV : 24.0 Volts
EXTBATTS : 0
FIRMWARE : 601.3.I
END APC  : 2017-11-14 23:40:57 +0100

output.md

{
  date: ' 2017-11-14 23',
  upsname: ' ups01',
  status: ' ONLINE',
  loadpct: ' 44.2 Percent',
  bcharge: ' 100.0 Percent',
  timeleft: ' 28.0 Minutes'
}