Class: Moodle2CC::Moodle2::Parsers::QuestionParsers::CalculatedParser

Inherits:
QuestionParser
  • Object
show all
Includes:
ParserHelper
Defined in:
lib/moodle2cc/moodle2/parsers/question_parsers/calculated_parser.rb

Constant Summary

Constants included from ParserHelper

ParserHelper::FILES_XML, ParserHelper::IMS_FILEBASE_TOKEN, ParserHelper::MODULE_XML, ParserHelper::MOODLE_FILEBASE_TOKEN, ParserHelper::SLASH_TOKEN, ParserHelper::XML_NULL_VALUE

Instance Method Summary collapse

Methods included from ParserHelper

#activity_directories, #parse_boolean, #parse_module, #parse_text

Methods inherited from QuestionParser

parse, register_parser_type

Instance Method Details

#parse_question(node) ⇒ Object 



8
9
10
11
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
46
47
48
49
50
 
# File 'lib/moodle2cc/moodle2/parsers/question_parsers/calculated_parser.rb', line 8

def parse_question(node)
  question = super(node, 'calculated')

  q_node = node.at_xpath("plugin_qtype_#{question.qtype}_question")

  answer_parser = Parsers::AnswerParser.new
  question.answers += q_node.search('answers/answer').map { |n| answer_parser.parse(n) }

  if question.answers.count > 1 && question.qtype == 'calculatedmulti'
    # turn multiple choice calculated questions into standard formula questions,
    # by ignoring the incorrect formulas
    if correct_formula = question.answers.detect{|a| a.fraction == 1}
      question.answers = [correct_formula]
    end
  end

  q_node.search('dataset_definitions/dataset_definition').each do |ds_node|
    var_name = parse_text(ds_node, 'name')
    question.dataset_definitions << {
        :name => var_name,
        :options => parse_text(ds_node, 'options')
    }
    ds_node.search('dataset_items/dataset_item').each do |ds_item_node|
      ident = parse_text(ds_item_node, 'number')
      var_set = question.var_sets.detect{|vs| vs[:ident] == ident}
      unless var_set
        var_set = {:ident => ident, :vars => {}}
        question.var_sets << var_set
      end
      var_set[:vars][var_name] = parse_text(ds_item_node, 'value')
    end
  end

  q_node.search('calculated_records/calculated_record').each do |cr_node|
    next unless parse_text(cr_node, 'answer') == question.answers.first.id.to_s

    question.correct_answer_format = parse_text(cr_node, 'correctanswerformat')
    question.correct_answer_length = parse_text(cr_node, 'correctanswerlength')
    question.tolerance = parse_text(cr_node, 'tolerance')
  end

  question
end