discourse/app/views/topics/show.html.erb

<% if @topic_view %>
  <div id="topic-title">
    <h1>
      <%= render_topic_title(@topic_view.topic) %>
    </h1>

    <% if @breadcrumbs.present? %>
      <div class="topic-category" itemscope itemtype="http://schema.org/BreadcrumbList">
        <% @breadcrumbs.each_with_index do |c, i| %>
          <span itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem">
            <a href="<%= @topic_view.topic.category.url %>" class="badge-wrapper bullet" itemprop="item">
              <span class='badge-category-bg' style='background-color: #<%= c[:color] %>'></span>
              <span class='badge-category clear-badge'>
                <span class='category-name' itemprop='name'><%= c[:name] %></span>
              </span>
            </a>
            <meta itemprop="position" content="<%= i + 1 %>" />
          </span>
        <% end %>
      </div>
    <% end %>

    <% if @tags.present? %>
      <div class="topic-category">
        <div class='discourse-tags list-tags'>
          <% @tags.each_with_index do |tag, i| %>
            <a href='<%= "#{Discourse.base_url}/tag/#{tag.name}" %>' class='discourse-tag' rel="tag"><%= tag.name -%></a><% if i < @tags.size - 1 %>, <% end %>
          <% end %>
        </div>
      </div>
    <% end %>
  </div>

  <%= server_plugin_outlet "topic_header" %>

  <%- if include_crawler_content? %>
    <div itemscope itemtype='http://schema.org/DiscussionForumPosting'>
      <meta itemprop='headline' content='<%= @topic_view.title %>'>
      <% if @topic_view.topic.category.present? %>
        <meta itemprop='articleSection' content='<%= @topic_view.topic.category.name %>'>
      <% end %>
      <meta itemprop='keywords' content='<%= @tags.map(&:name).join(', ') %>'>
      <div itemprop='publisher' itemscope itemtype="http://schema.org/Organization">
        <meta itemprop='name' content='<%= SiteSetting.company_name.presence || SiteSetting.title %>'>
        <% if application_logo_url.present? %>
          <div itemprop='logo' itemscope itemtype="http://schema.org/ImageObject">
            <meta itemprop='url' content='<%= application_logo_url %>'>
          </div>
        <% end %>
      </div>

      <% @topic_view.posts.each do |post| %>
        <% if (u = post.user) %>
          <div id='post_<%= post.post_number %>' <%= post.is_first_post? ? "" : "itemprop='comment' itemscope itemtype='http://schema.org/Comment'".html_safe %> class='topic-body crawler-post'>
            <div class='crawler-post-meta'>
              <span class="creator" itemprop="author" itemscope itemtype="http://schema.org/Person">
                <a itemprop="url" href='<%= Discourse.base_url %>/u/<%= u.username %>'><span itemprop='name'><%= u.username %></span></a>
                <%= "(#{u.name})" if (SiteSetting.display_name_on_posts && SiteSetting.enable_names? && !u.name.blank?) %>
                <%
                  post_custom_fields = @topic_view.post_custom_fields[post.id] || {}
                  who_username = post_custom_fields["action_code_who"] || ""
                  small_action_href = post_custom_fields["action_code_path"] || ""
                  if post.action_code
                %>
                  <%= t("js.action_codes.#{post.action_code}", when: "", who: who_username, href: small_action_href).html_safe %>
                <% end %>
              </span>

              <link itemprop="mainEntityOfPage" href="<%= post.topic.url %>">

              <% if post.image_url %>
                <link itemprop="image" href="<%= post.image_url %>">
              <% end %>

              <span class="crawler-post-infos">
                  <time itemprop='datePublished' datetime='<%= post.created_at.to_formatted_s(:iso8601) %>' class='post-time'>
                    <%= l post.created_at, format: :long %>
                  </time>
                <% if post.version > 1 %>
                  <meta itemprop='dateModified' content='<%= post.last_version_at.to_formatted_s(:iso8601) %>'>
                <% else %>
                  <meta itemprop='dateModified' content='<%= post.created_at.to_formatted_s(:iso8601) %>'>
                <% end %>
              <span itemprop='position'><%= post.post_number %></span>
              </span>
            </div>
            <div class='post' itemprop='<%= post.is_first_post? ? 'articleBody' : 'text'  %>'>
              <%= post.hidden ? t('flagging.user_must_edit').html_safe : post.cooked.html_safe %>
            </div>

            <div itemprop="interactionStatistic" itemscope itemtype="http://schema.org/InteractionCounter">
              <meta itemprop="interactionType" content="http://schema.org/LikeAction"/>
              <meta itemprop="userInteractionCount" content="<%= post.like_count %>" />
              <span class='post-likes'><%= post.like_count > 0 ? t('post.has_likes', count: post.like_count) : '' %></span>
            </div>

            <div itemprop="interactionStatistic" itemscope itemtype="http://schema.org/InteractionCounter">
                <meta itemprop="interactionType" content="http://schema.org/CommentAction"/>
                <meta itemprop="userInteractionCount" content="<%= post.reply_count %>" />
              </div>

              <% if @topic_view.link_counts[post.id] && @topic_view.link_counts[post.id].filter { |l| l[:reflection] }.length > 0 %>
                <div class='crawler-linkback-list' itemscope itemtype='http://schema.org/ItemList'>
                  <% @topic_view.link_counts[post.id].each_with_index do |link, i| %>
                    <% if link[:reflection] && link[:title].present? %>
                      <div itemprop='itemListElement' itemscope itemtype='http://schema.org/ListItem'>
                        <a itemprop='url' href="<%=link[:url]%>"><%=link[:title]%></a>
                        <meta itemprop='position' content='<%= i+1 %>'>
                      </div>
                    <% end %>
                  <% end %>
                </div>
            <% end %>
          </div>
        <% end %>
      <% end %>
    </div>

  <% if @topic_view.prev_page || @topic_view.next_page %>
    <div role='navigation' itemscope itemtype='http://schema.org/SiteNavigationElement' class="topic-body crawler-post">
      <% if @topic_view.prev_page %>
        <span itemprop='name'><%= link_to t(:prev_page), @topic_view.prev_page_path, rel: 'prev', itemprop: 'url' %></span>
      <% end %>
      <% if @topic_view.next_page %>
        <span itemprop='name'><b><%= link_to t(:next_page), @topic_view.next_page_path, rel: 'next', itemprop: 'url' %></b></span>
      <% end %>
    </div>
  <% end %>

  <% end %>

  <% content_for :head do %>
    <%= auto_discovery_link_tag(@topic_view, {action: :feed, slug: @topic_view.topic.slug, topic_id: @topic_view.topic.id}, rel: 'alternate nofollow', title: t('rss_posts_in_topic', topic: @topic_view.title), type: 'application/rss+xml') %>
    <%= raw crawlable_meta_data(title: @topic_view.title, description: @topic_view.summary(strip_images: true), image: @topic_view.image_url, read_time: @topic_view.read_time, like_count: @topic_view.like_count, ignore_canonical: true, published_time: @topic_view.published_time, breadcrumbs: @breadcrumbs, tags: @tags.map(&:name)) %>

    <% if @topic_view.prev_page || @topic_view.next_page %>
      <% if @topic_view.prev_page %>
        <link rel="prev" href="<%= @topic_view.prev_page_path -%>">
      <% end %>
      <% if @topic_view.next_page %>
        <link rel="next" href="<%= @topic_view.next_page_path -%>">
      <% end %>
    <% end %>
  <% end %>

  <% content_for(:title) { @title || "#{gsub_emoji_to_unicode(@topic_view.page_title)} - #{SiteSetting.title}" } %>

  <% if @topic_view.print %>
    <% content_for :after_body do %>
        <%= preload_script('print-page') %>
    <% end %>
  <% end %>
<% end %>