agenda-libre-ruby/app/views/versions/index.haml

%h2
  %em.fa.fa-exchange
  = title t '.title'

%table.list.autopagerize_page_element
  %thead
    %th.event
    %th.whodunnit= sort_link @search, :whodunnit
    %th.object= sort_link @search, :object_id
    %th.changeset= sort_link @search, :changeset
    %th.created_at= sort_link @search, :created_at
    %th.view/

  %tbody
    - @versions.each do |version|
      :ruby
        if version.event == 'create'
          object = version.item_type.constantize.find_by_id version.item_id
          next unless object.try(:moderated?)
        end
        object = version.reify if object.nil?

        changes = ''
        if version.event == 'update'
          version.changeset.each do |key, val|
            changes += version.item_type.constantize.human_attribute_name(key)
            changes += ': '
            if key == 'description' && val[0].present? && val[1].present?
              changes += Differ.diff(val[1], val[0]).to_s
            else
              changes += "#{val[0]} → #{val[1]}"
            end
            changes += '
            '
          end
          changes = strip_tags(changes).gsub(/^\s*/, '')
        end

      %tr
        %td= t ".#{version.event}_html"
        %td= User.find version.whodunnit if version.whodunnit
        %td= object
        %td.changes= changes
        %td= l version.created_at, format: :short
        %td
          - unless version.event == 'destroy'
            %a{ href: polymorphic_path(version.item_type.tableize.singularize,
                                       id: version.item_id) }
              %em.fa.fa-eye

  %tfoot
    %tr
      %th(colspan='6')= paginate @versions

.formats
  = link_to versions_path(format: :rss) do
    %em.fa.fa-rss
    = t '.feed'