Set twitter-style possibly_sensitive boolena.

lib/pleroma/web/twitter_api/representers/activity_representer.ex

@@ -112,6 +112,9 @@ def to_map(%Activity{data: %{"object" => %{"content" => content} = object}} = ac
 
     conversation_id = conversation_id(activity)
 
+    tags = activity.data["object"]["tag"] || []
+    possibly_sensitive = Enum.member?(tags, "nsfw")
+
     %{
       "id" => activity.id,
       "user" => UserView.render("show.json", %{user: user, for: opts[:for]}),
@@ -129,8 +132,9 @@ def to_map(%Activity{data: %{"object" => %{"content" => content} = object}} = ac
       "favorited" => to_boolean(favorited),
       "repeated" => to_boolean(repeated),
       "external_url" => object["external_url"],
-      "tags" => activity.data["object"]["tag"] || [],
-      "activity_type" => "post"
+      "tags" => tags,
+      "activity_type" => "post",
+      "possibly_sensitive" => possibly_sensitive
     }
   end
 

test/web/twitter_api/representers/activity_representer_test.exs

@@ -130,7 +130,8 @@ test "an activity" do
       "repeated" => false,
       "external_url" => "some url",
       "tags" => ["content", "mentioning", "nsfw"],
-      "activity_type" => "post"
+      "activity_type" => "post",
+      "possibly_sensitive" => true
     }
 
     assert ActivityRepresenter.to_map(activity, %{user: user, for: follower, mentioned: [mentioned_user]}) == expected_status