mastodon/app/views/stream_entries/show.html.haml

- content_for :header_tags do
  %link{ rel: 'alternate', type: 'application/atom+xml', href: account_stream_entry_url(@account, @stream_entry, format: 'atom') }/
  %link{ rel: 'alternate', type: 'application/json+oembed', href: api_oembed_url(url: account_stream_entry_url(@account, @stream_entry), format: 'json') }/

  %meta{ name: 'og:site_name', content: 'Mastodon' }/
  %meta{ name: 'og:type', content: 'article' }/
  %meta{ name: 'og:title', content: "#{@account.username} on #{Rails.configuration.x.local_domain}" }/
  %meta{ name: 'og:article:author', content: @account.username }/
  %meta{ name: 'og:description', content: @stream_entry.activity.content }/
  %meta{ name: 'og:image', content: @stream_entry.activity.is_a?(Status) && @stream_entry.activity.media_attachments.size > 0 ? full_asset_url(@stream_entry.activity.media_attachments.first.file.expiring_url(s3_expiry, :small)) : full_asset_url(@account.avatar.expiring_url(s3_expiry, :original)) }/

.activity-stream.activity-stream-headless
  = render partial: @type, locals: { @type.to_sym => @stream_entry.activity, include_threads: true }