Restructure code and add markdown downloads

app/controllers/search_controller.rb

@@ -22,7 +22,7 @@ def index
       # conversations with the client, we're looking to only export classic (as you can migrate a
       # classic question to new format).  This filename is another "helpful clue" and introduces
       # later considerations for what the file format might be.
-      filename = "questions-#{now.strftime('%Y-%m-%d_%H:%M:%S:%L')}.classic-question-canvas.qti.xml"
+      filename = "#{export_filename(now)}.classic-question-canvas.qti.xml"
       @questions = Question.filter(**filter_values)
 
       if any_question_has_images?
@@ -35,14 +35,35 @@ def index
     end
   end
 
-  def text_download
-    questions = Question.where(id: Bookmark.select(:question_id))
-    content = questions.map { |question| PlainTextFormatterService.new(question).format }.join('')
-    send_data content, filename: 'questions.txt', type: 'text/plain'
+  # download bookmarked questions
+  def download
+    @questions = Question.where(id: Bookmark.select(:question_id))
+    case params[:format]
+    when 'md'
+      md_download
+    when 'txt'
+      text_download
+    else
+      redirect_to authenticated_root_path, alert: t('.alert')
+    end
   end
 
   private
 
+  def export_filename(now = Time.current)
+    "questions-#{now.strftime('%Y-%m-%d_%H:%M:%S:%L')}"
+  end
+
+  def text_download
+    content = @questions.map { |question| QuestionFormatter::PlainTextService.new(question).format_content }.join('')
+    send_data content, filename: "#{export_filename}.txt", type: 'text/plain'
+  end
+
+  def md_download
+    content = @questions.map { |question| QuestionFormatter::MarkdownService.new(question).format_content }.join('')
+    send_data content, filename: "#{export_filename}.md", type: 'text/plain'
+  end
+
   def any_question_has_images?
     @questions.any? { |question| question.images.any? }
   end

app/javascript/components/ui/Search/SearchBar.jsx

@@ -90,13 +90,21 @@ const SearchBar = (props) => {
                   View Bookmarks
                 </a>
                 <a
-                  href={'/questions/text_download?format=txt'}
+                  href={'/questions/download?format=txt'}
                   className={`btn btn-primary p-2 m-2 ${!hasBookmarks ? 'disabled' : ''}`}
                   role='button'
                   aria-disabled={!hasBookmarks}
                 >
                   Export as Plain Text
                 </a>
+                <a
+                  href={'/questions/download?format=md'}
+                  className={`btn btn-primary p-2 m-2 ${!hasBookmarks ? 'disabled' : ''}`}
+                  role='button'
+                  aria-disabled={!hasBookmarks}
+                >
+                  Export as Markdown
+                </a>
                 <a
                   href={`/.xml?${bookmarkedQuestionIds.map(id => `bookmarked_question_ids[]=${encodeURIComponent(id)}`).join('&')}`}
                   className={`btn btn-primary p-2 m-2 ${!hasBookmarks ? 'disabled' : ''}`}

app/models/question/bow_tie.rb

@@ -32,7 +32,7 @@
 #   => true
 class Question::BowTie < Question
   self.type_name = "Bow Tie"
-  self.model_exporter = 'bow_tie'
+  self.model_exporter = 'bowtie_type'
 
   # NOTE: We're not storing this in a JSONB data type, but instead favoring a text field.  The need
   # for the data to be used in the application, beyond export of data, is minimal.

app/models/question/categorization.rb

@@ -8,7 +8,7 @@ class Question::Categorization < Question
   include MatchingQuestionBehavior
 
   self.type_name = "Categorization"
-  self.model_exporter = 'categorization'
+  self.model_exporter = 'categorization_type'
   self.export_as_xml = true
   self.choice_cardinality_is_multiple = true
 

app/models/question/drag_and_drop.rb

@@ -21,7 +21,7 @@
 #                data: [{ answer: "Aardvark", correct: true }, { answer: "Blue", correct: false }, { answer: "Yellow", correct:false }, { answer: "Cat", correct: true }])
 class Question::DragAndDrop < Question
   self.type_name = "Drag and Drop"
-  self.model_exporter = 'drag_and_drop'
+  self.model_exporter = 'traditional_type'
 
   ##
   # Represents the mapping process of a CSV Row to the underlying {Question::DragAndDrop}.

app/models/question/essay.rb

@@ -9,7 +9,7 @@ class Question::Essay < Question
   include MarkdownQuestionBehavior
 
   self.type_name = "Essay"
-  self.model_exporter = 'essay'
+  self.model_exporter = 'essay_type'
   self.export_as_xml = true
 
   class ImportCsvRow < MarkdownQuestionBehavior::ImportCsvRow

app/models/question/matching.rb

@@ -8,7 +8,7 @@ class Question::Matching < Question
   include MatchingQuestionBehavior
 
   self.type_name = "Matching"
-  self.model_exporter = 'matching'
+  self.model_exporter = 'matching_type'
   self.export_as_xml = true
   self.choice_cardinality_is_multiple = false
 

app/models/question/select_all_that_apply.rb

@@ -7,7 +7,7 @@
 # duplication than more complicated inheritance.
 class Question::SelectAllThatApply < Question
   self.type_name = "Select All That Apply"
-  self.model_exporter = 'select_all_that_apply'
+  self.model_exporter = 'traditional_type'
 
   ##
   # Represents the mapping process of a CSV Row to the underlying {Question::SelectAllThatApply}.

app/models/question/stimulus_case_study.rb

@@ -5,7 +5,7 @@
 class Question::StimulusCaseStudy < Question
   self.type_label = "Case Study"
   self.type_name = "Stimulus Case Study"
-  self.model_exporter = 'stimulus_case_study'
+  self.model_exporter = 'stimulus_type'
   self.has_parts = true
 
   has_many :as_parent_question_aggregations,

app/models/question/traditional.rb

@@ -10,7 +10,7 @@ class Question::Traditional < Question
   #
   # @see https://github.com/notch8/viva/issues/261
   self.type_name = "Multiple Choice"
-  self.model_exporter = 'multiple_choice'
+  self.model_exporter = 'traditional_type'
 
   ##
   # Represents the mapping process of a CSV Row to the underlying {Question::Traditional}.

app/models/question/upload.rb

@@ -10,7 +10,7 @@ class Question::Upload < Question
   include MarkdownQuestionBehavior
 
   self.type_name = "Upload"
-  self.model_exporter = 'upload'
+  self.model_exporter = 'essay_type'
   self.export_as_xml = true
 
   class ImportCsvRow < MarkdownQuestionBehavior::ImportCsvRow