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 



3
4
5
6
 
# File 'lib/greentable/export.rb', line 3

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

Instance Method Details

#_call(env) ⇒ Object 



12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
 
# 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 



8
9
10
 
# File 'lib/greentable/export.rb', line 8

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

#each(&block) ⇒ Object 



47
48
49
50
 
# File 'lib/greentable/export.rb', line 47

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