Pipeline: Add a side effects step after the transaction finishes

This is to run things like streaming notifications out, which will
sometimes need data that is created by the transaction, but is
streamed out asynchronously.

test/web/activity_pub/pipeline_test.exs

@@ -33,7 +33,10 @@ defmodule Pleroma.Web.ActivityPub.PipelineTest do
         {
           Pleroma.Web.ActivityPub.SideEffects,
           [],
-          [handle: fn o, m -> {:ok, o, m} end]
+          [
+            handle: fn o, m -> {:ok, o, m} end,
+            handle_after_transaction: fn m -> m end
+          ]
         },
         {
           Pleroma.Web.Federator,
@@ -71,7 +74,7 @@ defmodule Pleroma.Web.ActivityPub.PipelineTest do
         {
           Pleroma.Web.ActivityPub.SideEffects,
           [],
-          [handle: fn o, m -> {:ok, o, m} end]
+          [handle: fn o, m -> {:ok, o, m} end, handle_after_transaction: fn m -> m end]
         },
         {
           Pleroma.Web.Federator,
@@ -110,7 +113,7 @@ defmodule Pleroma.Web.ActivityPub.PipelineTest do
         {
           Pleroma.Web.ActivityPub.SideEffects,
           [],
-          [handle: fn o, m -> {:ok, o, m} end]
+          [handle: fn o, m -> {:ok, o, m} end, handle_after_transaction: fn m -> m end]
         },
         {
           Pleroma.Web.Federator,

test/web/activity_pub/side_effects_test.exs

@@ -22,6 +22,47 @@ defmodule Pleroma.Web.ActivityPub.SideEffectsTest do
   import Pleroma.Factory
   import Mock
 
+  describe "handle_after_transaction" do
+    test "it streams out notifications" do
+      author = insert(:user, local: true)
+      recipient = insert(:user, local: true)
+
+      {:ok, chat_message_data, _meta} = Builder.chat_message(author, recipient.ap_id, "hey")
+
+      {:ok, create_activity_data, _meta} =
+        Builder.create(author, chat_message_data["id"], [recipient.ap_id])
+
+      {:ok, create_activity, _meta} = ActivityPub.persist(create_activity_data, local: false)
+
+      {:ok, _create_activity, meta} =
+        SideEffects.handle(create_activity, local: false, object_data: chat_message_data)
+
+      assert [notification] = meta[:created_notifications]
+
+      with_mocks([
+        {
+          Pleroma.Web.Streamer,
+          [],
+          [
+            stream: fn _, _ -> nil end
+          ]
+        },
+        {
+          Pleroma.Web.Push,
+          [],
+          [
+            send: fn _ -> nil end
+          ]
+        }
+      ]) do
+        SideEffects.handle_after_transaction(meta)
+
+        assert called(Pleroma.Web.Streamer.stream(["user", "user:notification"], notification))
+        assert called(Pleroma.Web.Push.send(notification))
+      end
+    end
+  end
+
   describe "delete objects" do
     setup do
       user = insert(:user)
@@ -361,22 +402,47 @@ defmodule Pleroma.Web.ActivityPub.SideEffectsTest do
 
       {:ok, create_activity, _meta} = ActivityPub.persist(create_activity_data, local: false)
 
-      {:ok, _create_activity, _meta} =
-        SideEffects.handle(create_activity, local: false, object_data: chat_message_data)
+      with_mocks([
+        {
+          Pleroma.Web.Streamer,
+          [],
+          [
+            stream: fn _, _ -> nil end
+          ]
+        },
+        {
+          Pleroma.Web.Push,
+          [],
+          [
+            send: fn _ -> nil end
+          ]
+        }
+      ]) do
+        {:ok, _create_activity, meta} =
+          SideEffects.handle(create_activity, local: false, object_data: chat_message_data)
 
-      chat = Chat.get(author.id, recipient.ap_id)
+        # The notification gets created
+        assert [notification] = meta[:created_notifications]
+        assert notification.activity_id == create_activity.id
 
-      [cm_ref] = ChatMessageReference.for_chat_query(chat) |> Repo.all()
+        # But it is not sent out
+        refute called(Pleroma.Web.Streamer.stream(["user", "user:notification"], notification))
+        refute called(Pleroma.Web.Push.send(notification))
 
-      assert cm_ref.object.data["content"] == "hey"
-      assert cm_ref.unread == false
+        chat = Chat.get(author.id, recipient.ap_id)
 
-      chat = Chat.get(recipient.id, author.ap_id)
+        [cm_ref] = ChatMessageReference.for_chat_query(chat) |> Repo.all()
 
-      [cm_ref] = ChatMessageReference.for_chat_query(chat) |> Repo.all()
+        assert cm_ref.object.data["content"] == "hey"
+        assert cm_ref.unread == false
 
-      assert cm_ref.object.data["content"] == "hey"
-      assert cm_ref.unread == true
+        chat = Chat.get(recipient.id, author.ap_id)
+
+        [cm_ref] = ChatMessageReference.for_chat_query(chat) |> Repo.all()
+
+        assert cm_ref.object.data["content"] == "hey"
+        assert cm_ref.unread == true
+      end
     end
 
     test "it creates a Chat for the local users and bumps the unread count" do