dji_srt_parser/modules/deduceHeaders.js

Parses and interprets DJI's drones SRT metadata

//Creates as many headers as possible form the available name and units, inn and out create combinations
module.exports = function({ units, name }) {
  let parts;
  if (name) {
    //Get values inside parenthesis, usually units or similar, ofter one per sample value
    parts = name.match(/.*\((.+?)\).*/);
    if (parts && parts.length) {
      //Remove parenthesis
      name = name
        .replace(/\((.+?)\)/, '')
        .trim()
        .replace('  ', ' ');
      //Take every value inside parenthesis
      parts = parts[1].split(',').map(p => p.trim());
    } else parts = [];
  }

  let unitsHeaders = [];
  if (units) {
    //Save units as string array
    if (Array.isArray(units)) unitsHeaders = units;
    //Or single value string
    else unitsHeaders[0] = units;
  }

  //Put name here in case we don't loop
  let headers = [name];

  //Loop through all the names and units
  for (let i = 0; i < Math.max(parts.length, unitsHeaders.length); i++) {
    //Repeat elements if not enough iterations
    let part = parts[i] || parts[0] ? `(${parts[i] || parts[0]})` : '';
    let unit = unitsHeaders[i] || unitsHeaders[0] ? `[${unitsHeaders[i] || unitsHeaders[0]}]` : '';
    //And merge
    headers[i] = [name, part, unit].filter(e => e.length).join(' ');
  }

  return headers;
};