mastodon api: add interpreter for Article activity types

lib/pleroma/web/mastodon_api/views/status_view.ex

@@ -128,7 +128,7 @@ def render("status.json", %{activity: %{data: %{"object" => object}} = activity}
       in_reply_to_id: reply_to && to_string(reply_to.id),
       in_reply_to_account_id: reply_to_user && to_string(reply_to_user.id),
       reblog: nil,
-      content: HtmlSanitizeEx.basic_html(object["content"]),
+      content: render_content(object),
       created_at: created_at,
       reblogs_count: announcement_count,
       favourites_count: like_count,
@@ -207,4 +207,20 @@ def get_visibility(object) do
         "direct"
     end
   end
+
+  def render_content(%{"type" => "Article"} = object) do
+    summary = object["name"]
+    content =
+      if !!summary and summary != "" do
+        "<p><a href=\"#{object["url"]}\">#{summary}</a></p>#{object["content"]}"
+      else
+        object["content"]
+      end
+
+    HtmlSanitizeEx.basic_html(content)
+  end
+
+  def render_content(object) do
+    HtmlSanitizeEx.basic_html(object["content"])
+  end
 end