class Jekyll::Generators::RmarkdownGenerator

# File _plugins/notebook-rmarkdown.rb, line 13
def generate(site)
  # For every tutorial with the 'notebook' key in the page data
  site.pages.select { |page| Gtn::Notebooks.notebook_filter(page.data, 'r') }.each do |page|
    # We get the path to the tutorial source
    dir = File.dirname(File.join('.', page.url))
    fn = File.join('.', page.url).sub(/html$/, 'Rmd')

    # Tag our source page
    page.data['tags'] = page.data['tags'] || []
    page.data['tags'].push('rmarkdown-notebook')

    Jekyll.logger.info "[GTN/Notebooks/R] Rendering RMarkdown #{fn}"
    last_modified = Gtn::ModificationTimes.obtain_time(page.path)
    notebook = Gtn::Notebooks.render_rmarkdown(site, page.data, page.content, page.url, last_modified, fn)

    topic_id = dir.split('/')[-3]
    tutorial_id = dir.split('/')[-1]

    # Write it out!
    page2 = PageWithoutAFile.new(site, '', dir, "#{topic_id}-#{tutorial_id}.Rmd")
    page2.content = notebook
    page2.data['layout'] = nil
    page2.data['citation_target'] = 'R'
    site.pages << page2
  end

  page3 = PageWithoutAFile.new(site, '', File.join('assets', 'css'), 'r-notebook.css')
  page3.content = Gtn::Notebooks.generate_css
  page3.data['layout'] = nil
  site.pages << page3
end