#434

backend/app/services/counts_table_export.rb

@@ -167,13 +167,13 @@ class CountsTableExport
     cols = @query.axes.columns
     leading = [row_count, cols.any? ? 1 : 0].max
     columns = page.fetch(:column_headers)
-    Array.new([cols.length, 1].max) do |level|
+    headings = Array.new([cols.length, 1].max) do |level|
       prefix = Array.new(leading) { level.zero? ? @headers[_1].to_s : '' }
       prefix = [''] if row_count.zero? && cols.any?
       prefix + columns.each_with_index.map do |header, index|
         values = header[:values]
         if cols.empty?
-          header[:kind] == 'data' ? @labels.fetch('count', '') : total_label(header)
+          @labels.fetch('count', '')
         elsif level == values.length && header[:kind] != 'data'
           total_label(header)
         elsif level < values.length
@@ -188,6 +188,25 @@ class CountsTableExport
         end
       end
     end
+    return headings if cols.empty?
+
+    cols.each_index.flat_map do |level|
+      prefix = Array.new(leading, '')
+      prefix = headings.first.first(leading) if level.zero?
+      names = columns.each_with_index.map do |header, index|
+        next '' if header[:values].length < level
+
+        previous = index.positive? ? columns[index - 1][:values] : nil
+        if (previous && previous.length >= level &&
+            previous.first(level) == header[:values].first(level))
+          ''
+        else
+          @headers[row_count + level].to_s
+        end
+      end
+      headings[level] = Array.new(leading, '') + headings[level].drop(leading) if level.zero?
+      [prefix + names, headings[level]]
+    end
   end
 
   def pivot_cell(row, column, page)