Handle new-style mastodon follow lists

Fixes https://git.pleroma.social/pleroma/pleroma/issues/814

lib/pleroma/web/twitter_api/controllers/util_controller.ex

@@ -304,7 +304,12 @@ def follow_import(conn, %{"list" => %Plug.Upload{} = listfile}) do
   end
 
   def follow_import(%{assigns: %{user: follower}} = conn, %{"list" => list}) do
-    with followed_identifiers <- String.split(list),
+    with lines <- String.split(list, "\n"),
+         followed_identifiers <-
+           Enum.map(lines, fn line ->
+             String.split(line, ",") |> List.first()
+           end)
+           |> List.delete("Account address"),
          {:ok, _} = Task.start(fn -> User.follow_import(follower, followed_identifiers) end) do
       json(conn, "job started")
     end

test/web/twitter_api/util_controller_test.exs

@@ -26,6 +26,21 @@ test "it returns HTTP 200", %{conn: conn} do
       assert response == "job started"
     end
 
+    test "it imports new-style mastodon follow lists", %{conn: conn} do
+      user1 = insert(:user)
+      user2 = insert(:user)
+
+      response =
+        conn
+        |> assign(:user, user1)
+        |> post("/api/pleroma/follow_import", %{
+          "list" => "Account address,Show boosts\n#{user2.ap_id},true"
+        })
+        |> json_response(:ok)
+
+      assert response == "job started"
+    end
+
     test "requires 'follow' permission", %{conn: conn} do
       token1 = insert(:oauth_token, scopes: ["read", "write"])
       token2 = insert(:oauth_token, scopes: ["follow"])