# Provides methods for showing a summary of visits to a page, or overall popular pages.
module MintHelper

  # Shows a little HTML summary of hits to a url. 
  #
  # Returns nil if the page has never been hit.
  #
  # Pulls straight from the mint_visit table, so it can be very slow.
  def mint_page_views(url)
    if (visit_count = Mint.visits_to_resource(url)) > 0
      return %(<div class="mint_summary">This page has been viewed #{visit_count} times since #{Mint.earliest_visit_to_resource(url).strftime('%B %d, %Y')}</div>)
    end
    nil
  end

  # Returns an HTML summary for a specific page. Uses the cache, which is built with
  #
  #  rake mint:rebuild
  #
  # Call from Typo with 
  #
  #  mint_cached_page_views(article_url(article, true))
  #
  # See a stylesheet for the results at
  #
  #  http://nubyonrails.com/stylesheets/theme/mint.css
  #
  def mint_cached_page_views(url)
    if (hit_summary = MintCache.visits_to_resource(url))
      return %(<div class="mint_summary">This page has been viewed #{number_with_delimiter hit_summary.visit_count} times since #{hit_summary.earliest_visit.strftime('%B %d, %Y')}</div>)
    end
    nil    
  end

  # Shows a summary of popular pages, with links.
  def mint_cached_popular_pages(options={})
    stats = MintCache.popular_pages(options)
    stat_summaries = stats.map { |stat| "<li>#{link_to(stat.resource_title, stat.resource)}  (#{number_with_delimiter stat.visit_count} views)</li>" }
    return %(
<div class="mint_summary" style="text-align: left; margin-top: 1em;">
Recently Popular Pages (Top #{stat_summaries.length})
<ul>
#{stat_summaries.join('')}
</ul>
</div>
)
  end
  
end