Module: CanvasExporting::Exporter

Defined in:
lib/canvas_exporting/exporter.rb

Instance Method Summary collapse

Instance Method Details

#export ⇒ Object 



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# File 'lib/canvas_exporting/exporter.rb', line 10

def export
  @infile_tmp_file = infile_file

  type = params[:type] || 'image/png'
  extension = MIME::Types[type].first.extensions.first

  if params[:outputpath] == nil
    output_path = tmp_dir
  else
    output_path = params[:outputpath]
  end

  output_path = output_path + '/' if output_path[-1] != '/'

  if params[:filename] == nil
    filename = 'Chart.' + extension
  else
    filename = params[:filename]
  end

  @output_file = output_path + filename

  scale = params[:scale] || 2
  width = params[:width]
  constr = params[:constr] || 'Chart'

  convert_args = convert_args({infile: @infile_tmp_file.path,
                               outfile: @output_file,
                               scale: scale,
                               width: width,
                               constr: constr,
                               callback: callback_path
                              })

  result = ::Phantomjs.run(*convert_args)
  #puts result if VERBOSE

  # TODO: clean @output_tmp_file
  @infile_tmp_file.delete
  @callback_tmp_file.delete if @callback_tmp_file

  if /Error/ =~ result
    render text: result, status: 500
  else
    send_file @output_file, filename: "#{filename}", type: type
  end
end