DROffline log parser

dr_log_parser.js

'use strict';

const fs = require('fs'), readline = require('readline');
const drValues = [];
const input = process.argv[2];
const logPath = `./${input}`;
const average = array => array.reduce((a, b) => a + b) / array.length;

console.log(logPath);

const rd = readline.createInterface({
    input: fs.createReadStream(logPath),
    // output: process.stdout,
    console: false
});

rd.on('line', function(line) {
  if (line.includes('|  .flac |')) {
    const dr = line.split('|').slice(-2, -1)[0].trim();
    drValues.push(parseInt(dr));
  }
});

rd.on('close', function() {
  console.log('album', Math.round(average(drValues)));
  console.log('min', Math.min(...drValues));
  console.log('max', Math.max(...drValues));
  console.log(drValues.join(', '));
});

example_log.txt

                             File Name | Format |    SR | Word Length | Max. TPL |  LUFSi | DR (PMF) | 

                         01 Rapid Fire |  .flac | 44.1k |          16 |    +1.83 |  -8.11 |        7 | 
                         02 Metal Gods |  .flac | 44.1k |          16 |    +1.44 |  -9.15 |        8 | 
                   03 Breaking The Law |  .flac | 44.1k |          16 |    +1.53 |  -8.52 |        7 | 
                            04 Grinder |  .flac | 44.1k |          16 |    +1.80 |  -8.24 |        7 | 
                             05 United |  .flac | 44.1k |          16 |    +0.77 | -10.05 |        9 | 
06 You Don't Have To Be Old To Be Wise |  .flac | 44.1k |          16 |    +1.32 |  -8.41 |        8 | 
              07 Living After Midnight |  .flac | 44.1k |          16 |    +1.47 |  -9.14 |        8 | 
                           08 The Rage |  .flac | 44.1k |          16 |    +1.49 |  -8.99 |        7 | 
                            09 Steeler |  .flac | 44.1k |          16 |    +1.67 |  -8.83 |        7 | 
                  10 Red, White & Blue |  .flac | 44.1k |          16 |    +0.42 | -10.81 |        9 | 
                     11 Grinder [Live] |  .flac | 44.1k |          16 |    +0.74 | -10.08 |       10 | 

Number of EP/Album Files: 11
Official EP/Album DR: 8

how_to_use.sh

$ node.exe ./parser.js British-Steel_JP_SICP-6143_log.txt

./British-Steel_JP_SICP-6143_log.txt
album 8
min 7
max 10
7, 8, 7, 7, 9, 8, 8, 7, 7, 9, 10