ua-parser-caps/js/lib/util/file.js

capabilities for ua-parser2

/**
 * Load one or more capabilities files and join them to one single
 * capabilities file.
 *
 * Copyright (c) 2013 Commenthol
 * Released under the MIT License
 */

'use strict'

var fs = require('fs')
var jsyaml = require('js-yaml')

var M = module.exports

/**
 * load one capabilities file
 *
 * @param {String} files : filename(s) of the capability files to load
 * @return {Object} tree
 */
M.loadSync = function (file) {
  var
    content,
    tree

  content = fs.readFileSync(file, 'utf8')
  tree = jsyaml.safeLoad(content)

  return tree
}

/**
 * asynchronously load one capabilities file
 *
 * @param {String} files : filename(s) of the capability files to load
 * @param {Function} cb(err, tree) : callback function; `err` contains the error object if any; `tree` is the loaded tree;
 */
M.load = function (file, cb) {
  fs.readFile(file, 'utf8', function (err, content) {
    var tree
    if (err) {
      cb(err)
    } else {
      tree = jsyaml.safeLoad(content)
      cb(null, tree)
    }
  })
}