cray/parser/parse.js

Epub parser

/**
 * @author: Akshay Kr Singh.
 * @date:   20/11/15.
 * @github: https://github.com/akshayKrSingh
 */
var Reader = require('../reader/index');
var Editor = require('../editor/index');
var _ = require('lodash');
var util = require('util');
var EventEmitter = require('events').EventEmitter;
var parsePath = require('parse-filepath');

var Parser = function(path) {
  if (!(this instanceof Parser)) {
    return new Parser(path);
  }

  EventEmitter.call(this);

  var paths = (path) ? _.isArray(path) ? path : [path] : [],
    epubs = [], queueLength = paths.length, processedCounter = 0;
  var parser = this;

  function emitWhenDone() {
    if (processedCounter >= queueLength) {
      parser.emit('READY', epubs);
    }
  }

  _.each(paths, function(loc) {
    var e = Reader({path: loc}), locInfo = parsePath(loc);
    e.parse();

    e.baseName = locInfo.basename;
    e.absolutePath = locInfo.absolute;
    e.dirName = locInfo.dirName || 'CWD';

    epubs.push(e);

    epubs[epubs.length - 1].on('error', function() {
      processedCounter++;
      emitWhenDone();
    });

    epubs[epubs.length - 1].on('finish', function() {
      processedCounter++;
      emitWhenDone();
    });
  });

  this.queue = epubs;
  this.Reader = Reader;
  this.Editor = Editor;
};

util.inherits(Parser, EventEmitter);

module.exports = Parser;