Parse.com thumbnail creation retaining aspect ratio

parse_thumbnail

var Image = require("parse-image");

Parse.Cloud.beforeSave("_User", function(request, response) {
  var user = request.object;
  if (!user.get("profilePhoto")) {
    response.error("Users must have a profile photo.");
    return;
  }
 
  if (!user.dirty("profilePhoto")) {
    // The profile photo isn't being modified.
    response.success();
    return;
  }
 
  Parse.Cloud.httpRequest({
    url: user.get("profilePhoto").url()
 
  }).then(function(response) {
    var image = new Image();
    return image.setData(response.buffer);
 
  }).then(function(image) {
    // Crop the image to the smaller of width or height.
    var minSize = Math.min(image.width(), image.height());
    if(minSize === image.width())
    {
        return image.scale({
            width: 160,
            height: 160*image.height()/image.width()
        });
    }
    else
    {
        return image.scale({
            width: 160*image.width()/image.height(),
            height: 160
        });
    } 
  }).then(function(image) {
    // Make sure it's a JPEG to save disk space and bandwidth.
    return image.setFormat("JPEG");
 
  }).then(function(image) {
    // Get the image data in a Buffer.
    return image.data();
 
  }).then(function(buffer) {
    // Save the image into a new file.
    var base64 = buffer.toString("base64");
    var cropped = new Parse.File("thumbnail.jpg", { base64: base64 });
    return cropped.save();
 
  }).then(function(cropped) {
    // Attach the image file to the original object.
    user.set("profilePhotoThumbnail", cropped);
 
  }).then(function(result) {
    response.success();
  }, function(error) {
    response.error(error);
  });
});