save-image.js

var path = require('path');

var saveImage = function(article, image, fn) {
  var ending = path.extname(image.originalFilename);
  var unionPath = __dirname + '/../../public/images/unions/' + article.union;
  var newPath = unionPath + '/' + article._id + ending;
  var newPathCropped = unionPath + '/' + article._id + '_cropped' + ending;

  mkdirp(unionPath, function(err) {
    if (err) return fn(err);
    gm(image.path)
      .resize(500) // Resize to a width of 500px
      .noProfile()
      .write(newPathCropped, function(err) {
        if (err) return fn(err);
        article.imageCropped = newPathCropped;
        fs.rename(image.path, newPath, function(err) {
          if (err) return fn(err);
          article.image = newPath;
          article.imageName = image.originalFilename;
          return fn(null,  article);
        });
      });
  });
};

exports.create = function(req, res) {
  var form = new multiparty.Form();
  form.parse(req, function(err, fields, files) {
    var parsedFields = {};
    _.forOwn(fields, function(value, key) {
      parsedFields[key] = value[0];
    });

    if (parsedFields.event) {
      parsedFields.start = moment(parsedFields.start.slice(1, parsedFields.start.length-1)).toDate();
      parsedFields.end = moment(parsedFields.end.slice(1, parsedFields.end.length-1)).toDate();
    }

    var article = new Article(parsedFields);
    article.union = req.params.union;
    function saveSend(err, article) {
      if (err) console.log('Handle error.');
      article.save(function(err) {
        res.send(201, article);
      });
    }
    if (!_.isEmpty(files)) {
      saveImage(article, files.file[0], saveSend);
    }
    else saveSend(null, article);
  });
};