Class: S3Uploader::MainController

Inherits:
Volt::ModelController
  • Object
show all
Defined in:
app/s3_uploader/controllers/main_controller.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#uploading_promise ⇒ Object

Returns the value of attribute uploading_promise.



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# File 'app/s3_uploader/controllers/main_controller.rb', line 7

def uploading_promise
  @uploading_promise
end

Instance Method Details

#bucket_name ⇒ Object 



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# File 'app/s3_uploader/controllers/main_controller.rb', line 11

def bucket_name
  file_field_name = attrs.value_last_method
  attrs.value_parent.send(file_field_name + "_bucket")
end

#error(msg) ⇒ Object 



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# File 'app/s3_uploader/controllers/main_controller.rb', line 84

def error(msg)
  msg = msg.to_s
  promsise = self.uploading_promise
  self.uploading_promise = nil

  set_progress(0, msg, true)
  promsise.reject(msg)
end

#set_progress(progress, error = nil, done = false) ⇒ Object 



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# File 'app/s3_uploader/controllers/main_controller.rb', line 93

def set_progress(progress, error=nil, done=false)
  self.progress = progress
  self.error_message = error

  if attrs.respond_to?(:value)
    attrs.value = [progress, done ? s3_url : nil, @uploading_promise]
  end
end

#upload(event) ⇒ Object 



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# File 'app/s3_uploader/controllers/main_controller.rb', line 16

def upload(event)
  target = event.target
  set_progress(0)

  file = nil
  `
    var files = target.files;

    var output = [];
    for (var i = 0, f; file = files[i]; i++) {
      #{upload_file(file)}
    }
  `
end

#upload_file(file) ⇒ Object 



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# File 'app/s3_uploader/controllers/main_controller.rb', line 31

def upload_file(file)
  self.uploading_promise = Promise.new
  puts "UP FILE: #{uploading_promise.inspect}"

  S3UploadTasks.sign(bucket_name, `file.name`, `file.type`).then do |private_and_public|
    self.s3_url = private_and_public[1]
    upload_with_url(file, private_and_public[0])
  end.fail do |err|
    set_progress(0, 'Could not contact signing script. Status = ' + err.to_s)
  end
end

#upload_with_url(file, signed_url) ⇒ Object 



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# File 'app/s3_uploader/controllers/main_controller.rb', line 43

def upload_with_url(file, signed_url)
  # create PUT request to S3
  `
  var xhr = new XMLHttpRequest();
  xhr.open('PUT', signed_url);
  xhr.setRequestHeader('Content-Type', file.type);

  xhr.onload = function() {
    if (xhr.status == 200) {
      #{uploaded}
    }
  };

  xhr.onerror = function(e) {
    self.$error(e.error || 'Upload Error');
  };

  xhr.upload.onprogress = function(e) {
    console.log('onprogress');

    if (e.lengthComputable) {
      #{percentLoaded = `Math.round((e.loaded / e.total) * 100)`};
      #{set_progress(percentLoaded, nil)}
    }
  };

  xhr.send(file);
  `

  nil
end

#uploaded ⇒ Object

Resolve the uploading promise



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# File 'app/s3_uploader/controllers/main_controller.rb', line 76

def uploaded
  promise = self.uploading_promise
  self.uploading_promise = nil

  set_progress(100, nil, true)
  promise.resolve(nil)
end