Class: CanvasQtiToLearnosityConverter::QuizQuestion

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Defined in:
lib/canvas_qti_to_learnosity_converter/questions/question.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(xml) ⇒ QuizQuestion

Returns a new instance of QuizQuestion.



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# File 'lib/canvas_qti_to_learnosity_converter/questions/question.rb', line 12

def initialize(xml)
  @xml = xml
end

Class Method Details

.for(xml) ⇒ Object 



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# File 'lib/canvas_qti_to_learnosity_converter/questions/question.rb', line 8

def self.for(xml)
  new(xml)
end

Instance Method Details

#convert(assets, path) ⇒ Object 



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# File 'lib/canvas_qti_to_learnosity_converter/questions/question.rb', line 110

def convert(assets, path)
  object = to_learnosity
  add_learnosity_assets(assets, path, object) # mutates object in place; return value unused
  feedback = extract_feedback
  unless feedback.empty?
    # Ensure any asset references in feedback HTML are processed and collected.
    feedback.each do |key, value|
      if value.is_a?(String)
        process_assets!(assets, path, value)
      elsif key.to_s == "distractor_rationale_response_level" && value.is_a?(Array)
        value.each do |entry|
          process_assets!(assets, path, entry) if entry.is_a?(String)
        end
      end
    end
    object[:metadata] ||= {}
    object[:metadata].merge!(feedback)
  end

  object
end

#dynamic_content_data ⇒ Object 



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# File 'lib/canvas_qti_to_learnosity_converter/questions/question.rb', line 57

def dynamic_content_data()
  {}
end

#extract_feedback ⇒ Object 



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# File 'lib/canvas_qti_to_learnosity_converter/questions/question.rb', line 27

def extract_feedback
  feedback = {}
  distractor_rationale = []

  @xml.css("item > itemfeedback").each do |node|
    ident = node.attribute("ident")&.value
    text = node.css("flow_mat > material > mattext").first&.content
    next if text.nil? || text.empty?

    case ident
    when "correct_fb"           then feedback[:correct_feedback] = text
    when "general_fb"           then feedback[:general_feedback] = text
    when "general_incorrect_fb" then feedback[:incorrect_feedback] = text
    # Any other *_fb ident (e.g. per-answer labels like "abc123_fb") is treated as per-answer distractor rationale.
    else distractor_rationale << text if ident&.end_with?("_fb")
    end
  end

  feedback[:distractor_rationale_response_level] = distractor_rationale unless distractor_rationale.empty?
  feedback
end

#extract_mattext(mattext_node) ⇒ Object 



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# File 'lib/canvas_qti_to_learnosity_converter/questions/question.rb', line 49

def extract_mattext(mattext_node)
  mattext_node.content
end

#extract_points_possible ⇒ Object 



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# File 'lib/canvas_qti_to_learnosity_converter/questions/question.rb', line 21

def extract_points_possible
  @xml.css(%{ item > itemmetadata > qtimetadata >
    qtimetadatafield > fieldlabel:contains("points_possible")})
    &.first&.next&.text&.to_f || 1.0
end

#extract_stimulus ⇒ Object 



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# File 'lib/canvas_qti_to_learnosity_converter/questions/question.rb', line 16

def extract_stimulus()
  mattext = @xml.css("item > presentation > material > mattext").first
  extract_mattext(mattext)
end

#make_identifier ⇒ Object 



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# File 'lib/canvas_qti_to_learnosity_converter/questions/question.rb', line 53

def make_identifier()
  SecureRandom.uuid
end

#process_assets!(assets, path, text) ⇒ Object 



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# File 'lib/canvas_qti_to_learnosity_converter/questions/question.rb', line 61

def process_assets!(assets, path, text)
  doc = Nokogiri::XML.fragment(text)
  changed = false
  doc.css("img").each do |node|
    source = node["src"]
    next if !source

    source = URI::DEFAULT_PARSER.unescape(source)
    if /^\$IMS-CC-FILEBASE\$(.*)/.match(source) || /^((?!https?:).*)/.match(source)
      if source.start_with?("$IMS-CC-FILEBASE$")
        path = ''
      end
      asset_path = $1
      asset_path = asset_path.split("?").first.gsub(/^\//, '')
      asset_path = File.join(path, asset_path)
      clean_ext = File.extname(asset_path).gsub(/[^a-z0-9_.-]/i, '')
      assets[asset_path] ||= "#{SecureRandom.uuid}#{clean_ext}"
      node["src"] = "___EXPORT_ROOT___/assets/#{assets[asset_path]}"
      changed = true
    end
  end
  doc.css("audio").each do |node|
    source_node = node.css("source").first
    raw_src = source_node&.[]("src") || node["src"]
    next unless raw_src

    src = URI::DEFAULT_PARSER.unescape(raw_src)
    if /^\$IMS-CC-FILEBASE\$(.*)/.match(src) || /^((?!https?:).*)/.match(src)
      asset_path_base = src.start_with?("$IMS-CC-FILEBASE$") ? '' : path
      asset_path = $1.split("?").first.gsub(/^\//, '')
      asset_path = File.join(asset_path_base, asset_path)
      clean_ext = File.extname(asset_path).gsub(/[^a-z0-9_.-]/i, '')
      assets[asset_path] ||= "#{SecureRandom.uuid}#{clean_ext}"
      src = "___EXPORT_ROOT___/assets/#{assets[asset_path]}"
    end

    span = Nokogiri::XML::Node.new("span", doc)
    span["class"] = "learnosity-feature"
    span["data-player"] = "bar"
    span["data-simplefeature_id"] = SecureRandom.uuid
    span["data-src"] = src
    span["data-type"] = "audioplayer"
    span.add_child(Nokogiri::XML::Text.new("", doc))
    node.replace(span)
    changed = true
  end
  text.replace(doc.to_xml) if changed
end