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

Returns a new instance of Export.



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# File 'lib/greentable/export.rb', line 3

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 12

def _call(env)
  @status, @headers, @response = @app.call(env) rescue nil
  @ret = nil
  if env['QUERY_STRING'] =~ /greentable_export=([csv|rtf|xml]+)/i
    request    = Rack::Request.new(env)
    greentable_id = request.params['greentable_id']
    if greentable_id
      format = $1
      body = @response.respond_to?(:body) ? @response.body : @response.join
      doc = Hpricot(body.to_s)
      @ret= ""
      (doc/"##{greentable_id}//tr").each do |tr|
        row = []
        col = 0
        (tr/"/th | /td").each do |x|
          colspan = [(x.attributes['colspan'] || 1).to_i, 1].max
          row[col] = x.to_plain_text
          col += colspan
        end
        CSV.generate_row(row, row.length, @ret)
      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}.#{format}"
      @headers.delete('ETag')
      @headers.delete('Cache-Control')
    end
  end

  [@status, @headers, self]
end

#call(env) ⇒ Object 



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# File 'lib/greentable/export.rb', line 8

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

#each(&block) ⇒ Object 



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# File 'lib/greentable/export.rb', line 47

def each(&block)
  block.call(@ret) if @ret
  @response.each(&block)
end