Class: Greentable::Export

Inherits:
Object
  • Object
show all
Defined in:
lib/greentable/export.rb

Instance Method Summary collapse

Constructor Details

#initialize(app, *args, &block) ⇒ Export 



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# File 'lib/greentable/export.rb', line 5

def initialize(app, *args, &block)
  @app = app
  @env = nil
end

Instance Method Details

#_call(env) ⇒ Object 



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# File 'lib/greentable/export.rb', line 14

def _call(env)
  status, headers, response = @app.call(env)
  greentable_export = (env['QUERY_STRING'] || '').scan(/greentable_export=([csv|print]+)/i)[0][0] rescue nil
  if greentable_export
    request    = Rack::Request.new(env)
    greentable_id = request.params['greentable_id']
    if greentable_id
      body = response.respond_to?(:body) ? response.body : response.join

      require 'nokogiri'
      doc = Nokogiri(body.to_s)
      if greentable_export == 'csv'
        ret= ""
        (doc/"##{greentable_id} / * / tr").each do |tr|
          row = []
          col = 0
          (tr/"./th | ./td").each do |x|
            colspan = x.attributes['colspan']
            if colspan
              colspan = colspan.value.to_i rescue nil
            end
            colspan ||= 1
            row[col] = (x.inner_text || '').strip
            col += colspan
          end
          CSV.generate(ret, :encoding => 'UTF-8'){ |csv| csv << row }
        end
        filename = request.params['greentable_export_filename'] || "export"
        headers["Content-Length"] = ret.length.to_s
        headers["Content-Type"] = "text/csv"
        headers["Content-Disposition"] = "attachment; filename=#{filename}.#{greentable_export}"
        headers.delete('ETag')
        headers.delete('Cache-Control')
        response = [ret]
      elsif greentable_export == 'print'
        table_node = doc.css("##{greentable_id}").remove
        body = doc.css('body')[0]
        js_print = "<script>window.onload = function() { window.focus(); window.print(); }</script>"
        body.inner_html = table_node.to_html + js_print
        response = [doc.to_html]
      end
    end
  end

  [status, headers, response]
end

#call(env) ⇒ Object 



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# File 'lib/greentable/export.rb', line 10

def call(env)
  dup._call(env)
end