index.js

/**
 * read lines by file path
 */
import Debug from "debug";
import fs from "fs";

const debug = Debug("readlineq");

/**
 * read file into lines
 * @param  {[type]} file_path [description]
 * @return {[type]}           [description]
 */
function _read(file_path) {
  let lines = [];
  const allFileContents = fs.readFileSync(file_path, 'utf-8');
  allFileContents.split(/\r?\n/).forEach(line => {
    lines.push(line + "\n");
  });

  return lines;
}

/**
 * Write lines to file
 * @param  {[type]} from_ [description]
 * @param  {[type]} to_   [description]
 * @return {[type]}       [description]
 */
function _write(lines, to_) {
  if (typeof lines === "string") {
    fs.writeFileSync(to_, lines);
  } else if (lines.length > 0) {
    fs.writeFileSync(to_, lines.join(""));
  }
}

/**
 * write or read data
 * @param  {[type]} file_path [description]
 * @param  {[type]} obj       [description]
 * @return {[type]}           [description]
 */
export default function (file_path, obj) {
  if (obj) {
    return _write(obj, file_path);
  }
  return _read(file_path);
};