'use strict';

var fs = require('fs');
var pify = require('pify');

function read(filePath) {
  return pify(fs.readFile)(filePath, 'utf8');
}

function write(filePath, content) {
  return pify(fs.writeFile)(filePath, content);
}

function injectContentBetween(lines, content, startIndex, endIndex) {
  return [].concat(
    lines.slice(0, startIndex),
    content,
    lines.slice(endIndex)
  );
}

module.exports = {
  read: read,
  write: write,
  injectContentBetween: injectContentBetween
};