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path: root/app/server/util/upload.js
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var knox = require('knox')
var uuid = require('uuid/v1')

var s3 = knox.createClient({
  key: process.env.S3_KEY,
  secret: process.env.S3_SECRET,
  bucket: process.env.S3_BUCKET,
})

var acceptableuploadTypes = {
  'image/gif': 'gif',
  'image/jpeg': 'jpg',
  'image/jpg': 'jpg',
  'image/png': 'png',
}

module.exports = {}

module.exports.client = function(){
  return s3
}

module.exports.put = function (opt) {
  var filename
  var err
  var now = new Date()

  var file = opt.file

  var types = opt.types
  var extension = types && types[file.mimetype]

  if (opt.filename) {
    filename = opt.filename
  } else if (opt.preserveFilename) {
    filename = file.originalname
  } else {
    filename = uuid() + "." + extension;
  }

  var remote_path = opt.dirname + filename

  if (types && ! extension) {
    err = "Unacceptable filetype."
  }
  else if (opt.maxSize && file.size > opt.maxSize) {
    err = "File too large. Uploads can be a maximum of " + opt.maxSize + " bytes."
  }

  if (err) {
    console.error(">>>", err)
    opt.unacceptable && opt.unacceptable(err)
    return
  }

  opt.acceptable && opt.acceptable(err)

  console.log("upload >", remote_path)
  s3.putBuffer(file.buffer, remote_path, {
    'Content-Length': file.size,
    'Content-Type': file.mimetype,
    'x-amz-acl': 'public-read'
  }, function(err, s3res) {
    if (err || s3res.statusCode !== 200) {
      console.error(err);
      if (s3res && s3res.resume) {
        s3res.resume()
      }
      return;
    }

    var file_url = s3res.url || s3res.req.url

    opt.success && opt.success(file_url)
  }).on('error', function(err, s3res){
    console.error(err)
    s3res && s3res.resume && s3res.resume()
  })
}