class Moodle2CC::Moodle2::Parsers::QuestionParsers::CalculatedParser

Public Instance Methods

parse_question(node) click to toggle source
# 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