user: implement User.invisible?/1

lib/pleroma/user.ex

@@ -88,6 +88,9 @@ def superuser?(%User{local: true, info: %User.Info{is_admin: true}}), do: true
   def superuser?(%User{local: true, info: %User.Info{is_moderator: true}}), do: true
   def superuser?(_), do: false
 
+  def invisible?(%User{info: %User.Info{invisible: true}}), do: true
+  def invisible?(_), do: false
+
   def avatar_url(user, options \\ []) do
     case user.avatar do
       %{"url" => [%{"href" => href} | _]} -> href

test/user_test.exs

@@ -1232,6 +1232,20 @@ test "returns true for local admins" do
     end
   end
 
+  describe "invisible?/1" do
+    test "returns true for an invisible user" do
+      user = insert(:user, local: true, info: %{invisible: true})
+
+      assert User.invisible?(user)
+    end
+
+    test "returns false for a non-invisible user" do
+      user = insert(:user, local: true)
+
+      refute User.invisible?(user)
+    end
+  end
+
   describe "visible_for?/2" do
     test "returns true when the account is itself" do
       user = insert(:user, local: true)