Merge branch 'features/validators-note' into 'develop'

Pipeline Ingestion: Note

Closes #290

See merge request pleroma/pleroma!2984

31 files changed, 386 insertions, 315 deletions

diff --git a/lib/pleroma/ecto_type/activity_pub/object_validators/recipients.ex b/lib/pleroma/ecto_type/activity_pub/object_validators/recipients.ex
index af4b0e527..06fed8fb3 100644
--- a/lib/pleroma/ecto_type/activity_pub/object_validators/recipients.ex
+++ b/lib/pleroma/ecto_type/activity_pub/object_validators/recipients.ex
@@ -13,21 +13,33 @@ defmodule Pleroma.EctoType.ActivityPub.ObjectValidators.Recipients do
     cast([object])
   end
 
+  def cast(object) when is_map(object) do
+    case ObjectID.cast(object) do
+      {:ok, data} -> {:ok, [data]}
+      _ -> :error
+    end
+  end
+
   def cast(data) when is_list(data) do
-    data
-    |> Enum.reduce_while({:ok, []}, fn element, {:ok, list} ->
-      case ObjectID.cast(element) do
-        {:ok, id} ->
-          {:cont, {:ok, [id | list]}}
-
-        _ ->
-          {:halt, :error}
-      end
-    end)
+    data =
+      data
+      |> Enum.reduce_while([], fn element, list ->
+        case ObjectID.cast(element) do
+          {:ok, id} ->
+            {:cont, [id | list]}
+
+          _ ->
+            {:cont, list}
+        end
+      end)
+      |> Enum.sort()
+      |> Enum.uniq()
+
+    {:ok, data}
   end
 
-  def cast(_) do
-    :error
+  def cast(data) do
+    {:error, data}
   end
 
   def dump(data) do
diff --git a/lib/pleroma/maps.ex b/lib/pleroma/maps.ex
index 0d2e94248..b08b83305 100644
--- a/lib/pleroma/maps.ex
+++ b/lib/pleroma/maps.ex
@@ -12,4 +12,10 @@ defmodule Pleroma.Maps do
       _ -> map
     end
   end
+
+  def safe_put_in(data, keys, value) when is_map(data) and is_list(keys) do
+    Kernel.put_in(data, keys, value)
+  rescue
+    _ -> data
+  end
 end
diff --git a/lib/pleroma/object/fetcher.ex b/lib/pleroma/object/fetcher.ex
index bcccf1c4c..4ca67f0fd 100644
--- a/lib/pleroma/object/fetcher.ex
+++ b/lib/pleroma/object/fetcher.ex
@@ -4,6 +4,7 @@
 
 defmodule Pleroma.Object.Fetcher do
   alias Pleroma.HTTP
+  alias Pleroma.Maps
   alias Pleroma.Object
   alias Pleroma.Object.Containment
   alias Pleroma.Repo
@@ -101,6 +102,9 @@ defmodule Pleroma.Object.Fetcher do
       {:transmogrifier, {:error, {:reject, e}}} ->
         {:reject, e}
 
+      {:transmogrifier, {:reject, e}} ->
+        {:reject, e}
+
       {:transmogrifier, _} = e ->
         {:error, e}
 
@@ -124,12 +128,14 @@ defmodule Pleroma.Object.Fetcher do
   defp prepare_activity_params(data) do
     %{
       "type" => "Create",
-      "to" => data["to"] || [],
-      "cc" => data["cc"] || [],
       # Should we seriously keep this attributedTo thing?
       "actor" => data["actor"] || data["attributedTo"],
       "object" => data
     }
+    |> Maps.put_if_present("to", data["to"])
+    |> Maps.put_if_present("cc", data["cc"])
+    |> Maps.put_if_present("bto", data["bto"])
+    |> Maps.put_if_present("bcc", data["bcc"])
   end
 
   def fetch_object_from_id!(id, options \\ []) do
diff --git a/lib/pleroma/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex
index d0051d1cb..18368943d 100644
--- a/lib/pleroma/web/activity_pub/activity_pub.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub.ex
@@ -88,7 +88,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
 
   defp increase_replies_count_if_reply(_create_data), do: :noop
 
-  @object_types ~w[ChatMessage Question Answer Audio Video Event Article]
+  @object_types ~w[ChatMessage Question Answer Audio Video Event Article Note]
   @impl true
   def persist(%{"type" => type} = object, meta) when type in @object_types do
     with {:ok, object} <- Object.create(object) do
diff --git a/lib/pleroma/web/activity_pub/object_validator.ex b/lib/pleroma/web/activity_pub/object_validator.ex
index 1dce33f1a..248a12a36 100644
--- a/lib/pleroma/web/activity_pub/object_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validator.ex
@@ -102,7 +102,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidator do
         %{"type" => "Create", "object" => %{"type" => objtype} = object} = create_activity,
         meta
       )
-      when objtype in ~w[Question Answer Audio Video Event Article] do
+      when objtype in ~w[Question Answer Audio Video Event Article Note] do
     with {:ok, object_data} <- cast_and_apply(object),
          meta = Keyword.put(meta, :object_data, object_data |> stringify_keys),
          {:ok, create_activity} <-
@@ -115,7 +115,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidator do
   end
 
   def validate(%{"type" => type} = object, meta)
-      when type in ~w[Event Question Audio Video Article] do
+      when type in ~w[Event Question Audio Video Article Note] do
     validator =
       case type do
         "Event" -> EventValidator
@@ -123,6 +123,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidator do
         "Audio" -> AudioVideoValidator
         "Video" -> AudioVideoValidator
         "Article" -> ArticleNoteValidator
+        "Note" -> ArticleNoteValidator
       end
 
     with {:ok, object} <-
@@ -194,7 +195,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidator do
     EventValidator.cast_and_apply(object)
   end
 
-  def cast_and_apply(%{"type" => "Article"} = object) do
+  def cast_and_apply(%{"type" => type} = object) when type in ~w[Article Note] do
     ArticleNoteValidator.cast_and_apply(object)
   end
 
diff --git a/lib/pleroma/web/activity_pub/object_validators/answer_validator.ex b/lib/pleroma/web/activity_pub/object_validators/answer_validator.ex
index c9bd9e42d..3451e1ff8 100644
--- a/lib/pleroma/web/activity_pub/object_validators/answer_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/answer_validator.ex
@@ -6,6 +6,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AnswerValidator do
   use Ecto.Schema
 
   alias Pleroma.EctoType.ActivityPub.ObjectValidators
+  alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes
   alias Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations
 
   import Ecto.Changeset
@@ -23,6 +24,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AnswerValidator do
     field(:name, :string)
     field(:inReplyTo, ObjectValidators.ObjectID)
     field(:attributedTo, ObjectValidators.ObjectID)
+    field(:context, :string)
 
     # TODO: Remove actor on objects
     field(:actor, ObjectValidators.ObjectID)
@@ -46,6 +48,11 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AnswerValidator do
   end
 
   def changeset(struct, data) do
+    data =
+      data
+      |> CommonFixes.fix_actor()
+      |> CommonFixes.fix_object_defaults()
+
     struct
     |> cast(data, __schema__(:fields))
   end
diff --git a/lib/pleroma/web/activity_pub/object_validators/article_note_validator.ex b/lib/pleroma/web/activity_pub/object_validators/article_note_validator.ex
index 39ef6dc29..193f85f49 100644
--- a/lib/pleroma/web/activity_pub/object_validators/article_note_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/article_note_validator.ex
@@ -50,6 +50,8 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.ArticleNoteValidator do
 
     field(:likes, {:array, ObjectValidators.ObjectID}, default: [])
     field(:announcements, {:array, ObjectValidators.ObjectID}, default: [])
+
+    field(:replies, {:array, ObjectValidators.ObjectID}, default: [])
   end
 
   def cast_and_apply(data) do
@@ -65,25 +67,39 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.ArticleNoteValidator do
   end
 
   def cast_data(data) do
-    data = fix(data)
-
     %__MODULE__{}
     |> changeset(data)
   end
 
-  defp fix_url(%{"url" => url} = data) when is_map(url) do
-    Map.put(data, "url", url["href"])
-  end
-
+  defp fix_url(%{"url" => url} = data) when is_bitstring(url), do: data
+  defp fix_url(%{"url" => url} = data) when is_map(url), do: Map.put(data, "url", url["href"])
   defp fix_url(data), do: data
 
+  defp fix_tag(%{"tag" => tag} = data) when is_list(tag), do: data
+  defp fix_tag(%{"tag" => tag} = data) when is_map(tag), do: Map.put(data, "tag", [tag])
+  defp fix_tag(data), do: Map.drop(data, ["tag"])
+
+  defp fix_replies(%{"replies" => %{"first" => %{"items" => replies}}} = data)
+       when is_list(replies),
+       do: Map.put(data, "replies", replies)
+
+  defp fix_replies(%{"replies" => %{"items" => replies}} = data) when is_list(replies),
+    do: Map.put(data, "replies", replies)
+
+  defp fix_replies(%{"replies" => replies} = data) when is_bitstring(replies),
+    do: Map.drop(data, ["replies"])
+
+  defp fix_replies(data), do: data
+
   defp fix(data) do
     data
-    |> CommonFixes.fix_defaults()
-    |> CommonFixes.fix_attribution()
     |> CommonFixes.fix_actor()
+    |> CommonFixes.fix_object_defaults()
     |> fix_url()
+    |> fix_tag()
+    |> fix_replies()
     |> Transmogrifier.fix_emoji()
+    |> Transmogrifier.fix_content_map()
   end
 
   def changeset(struct, data) do
diff --git a/lib/pleroma/web/activity_pub/object_validators/audio_video_validator.ex b/lib/pleroma/web/activity_pub/object_validators/audio_video_validator.ex
index 27e14b16d..572687deb 100644
--- a/lib/pleroma/web/activity_pub/object_validators/audio_video_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/audio_video_validator.ex
@@ -119,9 +119,8 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AudioVideoValidator do
 
   defp fix(data) do
     data
-    |> CommonFixes.fix_defaults()
-    |> CommonFixes.fix_attribution()
     |> CommonFixes.fix_actor()
+    |> CommonFixes.fix_object_defaults()
     |> Transmogrifier.fix_emoji()
     |> fix_url()
     |> fix_content()
diff --git a/lib/pleroma/web/activity_pub/object_validators/common_fixes.ex b/lib/pleroma/web/activity_pub/object_validators/common_fixes.ex
index 5f2c633bc..c958fcc5d 100644
--- a/lib/pleroma/web/activity_pub/object_validators/common_fixes.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/common_fixes.ex
@@ -3,26 +3,55 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes do
+  alias Pleroma.EctoType.ActivityPub.ObjectValidators
   alias Pleroma.Object.Containment
+  alias Pleroma.User
+  alias Pleroma.Web.ActivityPub.Transmogrifier
   alias Pleroma.Web.ActivityPub.Utils
 
-  # based on Pleroma.Web.ActivityPub.Utils.lazy_put_objects_defaults
-  def fix_defaults(data) do
+  def cast_and_filter_recipients(message, field, follower_collection, field_fallback \\ []) do
+    {:ok, data} = ObjectValidators.Recipients.cast(message[field] || field_fallback)
+
+    data =
+      Enum.reject(data, fn x ->
+        String.ends_with?(x, "/followers") and x != follower_collection
+      end)
+
+    Map.put(message, field, data)
+  end
+
+  def fix_object_defaults(data) do
     %{data: %{"id" => context}, id: context_id} =
       Utils.create_context(data["context"] || data["conversation"])
 
+    %User{follower_address: follower_collection} = User.get_cached_by_ap_id(data["attributedTo"])
+
     data
     |> Map.put("context", context)
     |> Map.put("context_id", context_id)
+    |> cast_and_filter_recipients("to", follower_collection)
+    |> cast_and_filter_recipients("cc", follower_collection)
+    |> cast_and_filter_recipients("bto", follower_collection)
+    |> cast_and_filter_recipients("bcc", follower_collection)
+    |> Transmogrifier.fix_implicit_addressing(follower_collection)
   end
 
-  def fix_attribution(data) do
-    data
-    |> Map.put_new("actor", data["attributedTo"])
+  def fix_activity_addressing(activity, _meta) do
+    %User{follower_address: follower_collection} = User.get_cached_by_ap_id(activity["actor"])
+
+    activity
+    |> cast_and_filter_recipients("to", follower_collection)
+    |> cast_and_filter_recipients("cc", follower_collection)
+    |> cast_and_filter_recipients("bto", follower_collection)
+    |> cast_and_filter_recipients("bcc", follower_collection)
+    |> Transmogrifier.fix_implicit_addressing(follower_collection)
   end
 
   def fix_actor(data) do
-    actor = Containment.get_actor(data)
+    actor =
+      data
+      |> Map.put_new("actor", data["attributedTo"])
+      |> Containment.get_actor()
 
     data
     |> Map.put("actor", actor)
diff --git a/lib/pleroma/web/activity_pub/object_validators/common_validations.ex b/lib/pleroma/web/activity_pub/object_validators/common_validations.ex
index 940430588..be5074348 100644
--- a/lib/pleroma/web/activity_pub/object_validators/common_validations.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/common_validations.ex
@@ -15,6 +15,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations do
       fields
       |> Enum.map(fn field -> get_field(cng, field) end)
       |> Enum.any?(fn
+        nil -> false
         [] -> false
         _ -> true
       end)
diff --git a/lib/pleroma/web/activity_pub/object_validators/create_generic_validator.ex b/lib/pleroma/web/activity_pub/object_validators/create_generic_validator.ex
index e06e442f4..d2de53049 100644
--- a/lib/pleroma/web/activity_pub/object_validators/create_generic_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/create_generic_validator.ex
@@ -10,8 +10,10 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CreateGenericValidator do
 
   alias Pleroma.EctoType.ActivityPub.ObjectValidators
   alias Pleroma.Object
+  alias Pleroma.User
   alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes
   alias Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations
+  alias Pleroma.Web.ActivityPub.Transmogrifier
 
   import Ecto.Changeset
 
@@ -23,6 +25,8 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CreateGenericValidator do
     field(:type, :string)
     field(:to, ObjectValidators.Recipients, default: [])
     field(:cc, ObjectValidators.Recipients, default: [])
+    field(:bto, ObjectValidators.Recipients, default: [])
+    field(:bcc, ObjectValidators.Recipients, default: [])
     field(:object, ObjectValidators.ObjectID)
     field(:expires_at, ObjectValidators.DateTime)
 
@@ -54,39 +58,37 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CreateGenericValidator do
     |> cast(data, __schema__(:fields))
   end
 
-  defp fix_context(data, meta) do
-    if object = meta[:object_data] do
-      Map.put_new(data, "context", object["context"])
-    else
-      data
-    end
-  end
+  # CommonFixes.fix_activity_addressing adapted for Create specific behavior
+  defp fix_addressing(data, object) do
+    %User{follower_address: follower_collection} = User.get_cached_by_ap_id(data["actor"])
 
-  defp fix_addressing(data, meta) do
-    if object = meta[:object_data] do
-      data
-      |> Map.put_new("to", object["to"] || [])
-      |> Map.put_new("cc", object["cc"] || [])
-    else
-      data
-    end
+    data
+    |> CommonFixes.cast_and_filter_recipients("to", follower_collection, object["to"])
+    |> CommonFixes.cast_and_filter_recipients("cc", follower_collection, object["cc"])
+    |> CommonFixes.cast_and_filter_recipients("bto", follower_collection, object["bto"])
+    |> CommonFixes.cast_and_filter_recipients("bcc", follower_collection, object["bcc"])
+    |> Transmogrifier.fix_implicit_addressing(follower_collection)
   end
 
-  defp fix(data, meta) do
+  def fix(data, meta) do
+    object = meta[:object_data]
+
     data
-    |> fix_context(meta)
-    |> fix_addressing(meta)
     |> CommonFixes.fix_actor()
+    |> Map.put_new("context", object["context"])
+    |> fix_addressing(object)
   end
 
   defp validate_data(cng, meta) do
+    object = meta[:object_data]
+
     cng
-    |> validate_required([:actor, :type, :object])
+    |> validate_required([:actor, :type, :object, :to, :cc])
     |> validate_inclusion(:type, ["Create"])
     |> CommonValidations.validate_actor_presence()
-    |> CommonValidations.validate_any_presence([:to, :cc])
-    |> validate_actors_match(meta)
-    |> validate_context_match(meta)
+    |> validate_actors_match(object)
+    |> validate_context_match(object)
+    |> validate_addressing_match(object)
     |> validate_object_nonexistence()
     |> validate_object_containment()
   end
@@ -118,8 +120,8 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CreateGenericValidator do
     end)
   end
 
-  def validate_actors_match(cng, meta) do
-    attributed_to = meta[:object_data]["attributedTo"] || meta[:object_data]["actor"]
+  def validate_actors_match(cng, object) do
+    attributed_to = object["attributedTo"] || object["actor"]
 
     cng
     |> validate_change(:actor, fn :actor, actor ->
@@ -131,7 +133,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CreateGenericValidator do
     end)
   end
 
-  def validate_context_match(cng, %{object_data: %{"context" => object_context}}) do
+  def validate_context_match(cng, %{"context" => object_context}) do
     cng
     |> validate_change(:context, fn :context, context ->
       if context == object_context do
@@ -142,5 +144,18 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CreateGenericValidator do
     end)
   end
 
-  def validate_context_match(cng, _), do: cng
+  def validate_addressing_match(cng, object) do
+    [:to, :cc, :bcc, :bto]
+    |> Enum.reduce(cng, fn field, cng ->
+      object_data = object[to_string(field)]
+
+      validate_change(cng, field, fn field, data ->
+        if data == object_data do
+          []
+        else
+          [{field, "field doesn't match with object (#{inspect(object_data)})"}]
+        end
+      end)
+    end)
+  end
 end
diff --git a/lib/pleroma/web/activity_pub/object_validators/create_note_validator.ex b/lib/pleroma/web/activity_pub/object_validators/create_note_validator.ex
deleted file mode 100644
index a85a0298c..000000000
--- a/lib/pleroma/web/activity_pub/object_validators/create_note_validator.ex
+++ /dev/null
@@ -1,29 +0,0 @@
-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.Web.ActivityPub.ObjectValidators.CreateNoteValidator do
-  use Ecto.Schema
-
-  alias Pleroma.EctoType.ActivityPub.ObjectValidators
-  alias Pleroma.Web.ActivityPub.ObjectValidators.NoteValidator
-
-  import Ecto.Changeset
-
-  @primary_key false
-
-  embedded_schema do
-    field(:id, ObjectValidators.ObjectID, primary_key: true)
-    field(:actor, ObjectValidators.ObjectID)
-    field(:type, :string)
-    field(:to, ObjectValidators.Recipients, default: [])
-    field(:cc, ObjectValidators.Recipients, default: [])
-    field(:bto, ObjectValidators.Recipients, default: [])
-    field(:bcc, ObjectValidators.Recipients, default: [])
-    embeds_one(:object, NoteValidator)
-  end
-
-  def cast_data(data) do
-    cast(%__MODULE__{}, data, __schema__(:fields))
-  end
-end
diff --git a/lib/pleroma/web/activity_pub/object_validators/event_validator.ex b/lib/pleroma/web/activity_pub/object_validators/event_validator.ex
index d42458ef5..fee2e997a 100644
--- a/lib/pleroma/web/activity_pub/object_validators/event_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/event_validator.ex
@@ -72,8 +72,8 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.EventValidator do
 
   defp fix(data) do
     data
-    |> CommonFixes.fix_defaults()
-    |> CommonFixes.fix_attribution()
+    |> CommonFixes.fix_actor()
+    |> CommonFixes.fix_object_defaults()
     |> Transmogrifier.fix_emoji()
   end
 
diff --git a/lib/pleroma/web/activity_pub/object_validators/question_validator.ex b/lib/pleroma/web/activity_pub/object_validators/question_validator.ex
index 7012e2e1d..083d08ec4 100644
--- a/lib/pleroma/web/activity_pub/object_validators/question_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/question_validator.ex
@@ -83,8 +83,8 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.QuestionValidator do
 
   defp fix(data) do
     data
-    |> CommonFixes.fix_defaults()
-    |> CommonFixes.fix_attribution()
+    |> CommonFixes.fix_actor()
+    |> CommonFixes.fix_object_defaults()
     |> Transmogrifier.fix_emoji()
     |> fix_closed()
   end
diff --git a/lib/pleroma/web/activity_pub/side_effects.ex b/lib/pleroma/web/activity_pub/side_effects.ex
index 5fe143c2b..674356d9a 100644
--- a/lib/pleroma/web/activity_pub/side_effects.ex
+++ b/lib/pleroma/web/activity_pub/side_effects.ex
@@ -203,6 +203,19 @@ defmodule Pleroma.Web.ActivityPub.SideEffects do
         Object.increase_replies_count(in_reply_to)
       end
 
+      reply_depth = (meta[:depth] || 0) + 1
+
+      # FIXME: Force inReplyTo to replies
+      if Pleroma.Web.Federator.allowed_thread_distance?(reply_depth) and
+           object.data["replies"] != nil do
+        for reply_id <- object.data["replies"] do
+          Pleroma.Workers.RemoteFetcherWorker.enqueue("fetch_remote", %{
+            "id" => reply_id,
+            "depth" => reply_depth
+          })
+        end
+      end
+
       ConcurrentLimiter.limit(Pleroma.Web.RichMedia.Helpers, fn ->
         Task.start(fn -> Pleroma.Web.RichMedia.Helpers.fetch_data_for_activity(activity) end)
       end)
@@ -423,7 +436,7 @@ defmodule Pleroma.Web.ActivityPub.SideEffects do
   end
 
   def handle_object_creation(%{"type" => objtype} = object, meta)
-      when objtype in ~w[Audio Video Question Event Article] do
+      when objtype in ~w[Audio Video Question Event Article Note] do
     with {:ok, object, meta} <- Pipeline.common_pipeline(object, meta) do
       {:ok, object, meta}
     end
diff --git a/lib/pleroma/web/activity_pub/transmogrifier.ex b/lib/pleroma/web/activity_pub/transmogrifier.ex
index a40d51c45..7da29b197 100644
--- a/lib/pleroma/web/activity_pub/transmogrifier.ex
+++ b/lib/pleroma/web/activity_pub/transmogrifier.ex
@@ -43,7 +43,6 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     |> fix_content_map()
     |> fix_addressing()
     |> fix_summary()
-    |> fix_type(options)
   end
 
   def fix_summary(%{"summary" => nil} = object) do
@@ -72,17 +71,21 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     end
   end
 
-  def fix_explicit_addressing(
-        %{"to" => to, "cc" => cc} = object,
-        explicit_mentions,
-        follower_collection
-      ) do
-    explicit_to = Enum.filter(to, fn x -> x in explicit_mentions end)
+  # if directMessage flag is set to true, leave the addressing alone
+  def fix_explicit_addressing(%{"directMessage" => true} = object, _follower_collection),
+    do: object
+
+  def fix_explicit_addressing(%{"to" => to, "cc" => cc} = object, follower_collection) do
+    explicit_mentions =
+      Utils.determine_explicit_mentions(object) ++
+        [Pleroma.Constants.as_public(), follower_collection]
 
+    explicit_to = Enum.filter(to, fn x -> x in explicit_mentions end)
     explicit_cc = Enum.filter(to, fn x -> x not in explicit_mentions end)
 
     final_cc =
       (cc ++ explicit_cc)
+      |> Enum.filter(& &1)
       |> Enum.reject(fn x -> String.ends_with?(x, "/followers") and x != follower_collection end)
       |> Enum.uniq()
 
@@ -91,29 +94,6 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     |> Map.put("cc", final_cc)
   end
 
-  def fix_explicit_addressing(object, _explicit_mentions, _followers_collection), do: object
-
-  # if directMessage flag is set to true, leave the addressing alone
-  def fix_explicit_addressing(%{"directMessage" => true} = object), do: object
-
-  def fix_explicit_addressing(object) do
-    explicit_mentions = Utils.determine_explicit_mentions(object)
-
-    %User{follower_address: follower_collection} =
-      object
-      |> Containment.get_actor()
-      |> User.get_cached_by_ap_id()
-
-    explicit_mentions =
-      explicit_mentions ++
-        [
-          Pleroma.Constants.as_public(),
-          follower_collection
-        ]
-
-    fix_explicit_addressing(object, explicit_mentions, follower_collection)
-  end
-
   # if as:Public is addressed, then make sure the followers collection is also addressed
   # so that the activities will be delivered to local users.
   def fix_implicit_addressing(%{"to" => to, "cc" => cc} = object, followers_collection) do
@@ -137,19 +117,19 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     end
   end
 
-  def fix_implicit_addressing(object, _), do: object
-
   def fix_addressing(object) do
-    {:ok, %User{} = user} = User.get_or_fetch_by_ap_id(object["actor"])
-    followers_collection = User.ap_followers(user)
+    {:ok, %User{follower_address: follower_collection}} =
+      object
+      |> Containment.get_actor()
+      |> User.get_or_fetch_by_ap_id()
 
     object
     |> fix_addressing_list("to")
     |> fix_addressing_list("cc")
     |> fix_addressing_list("bto")
     |> fix_addressing_list("bcc")
-    |> fix_explicit_addressing()
-    |> fix_implicit_addressing(followers_collection)
+    |> fix_explicit_addressing(follower_collection)
+    |> fix_implicit_addressing(follower_collection)
   end
 
   def fix_actor(%{"attributedTo" => actor} = object) do
@@ -342,19 +322,18 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
 
   def fix_content_map(object), do: object
 
-  def fix_type(object, options \\ [])
+  defp fix_type(%{"type" => "Note", "inReplyTo" => reply_id, "name" => _} = object, options)
+       when is_binary(reply_id) do
+    options = Keyword.put(options, :fetch, true)
 
-  def fix_type(%{"inReplyTo" => reply_id, "name" => _} = object, options)
-      when is_binary(reply_id) do
-    with true <- Federator.allowed_thread_distance?(options[:depth]),
-         {:ok, %{data: %{"type" => "Question"} = _} = _} <- get_obj_helper(reply_id, options) do
+    with %Object{data: %{"type" => "Question"}} <- Object.normalize(reply_id, options) do
       Map.put(object, "type", "Answer")
     else
       _ -> object
     end
   end
 
-  def fix_type(object, _), do: object
+  defp fix_type(object, _options), do: object
 
   # Reduce the object list to find the reported user.
   defp get_reported(objects) do
@@ -425,10 +404,9 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
   # - tags
   # - emoji
   def handle_incoming(
-        %{"type" => "Create", "object" => %{"type" => objtype} = object} = data,
+        %{"type" => "Create", "object" => %{"type" => "Page"} = object} = data,
         options
-      )
-      when objtype in ~w{Note Page} do
+      ) do
     actor = Containment.get_actor(data)
 
     with nil <- Activity.get_create_by_object_ap_id(object["id"]),
@@ -520,14 +498,23 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
 
   def handle_incoming(
         %{"type" => "Create", "object" => %{"type" => objtype, "id" => obj_id}} = data,
-        _options
+        options
       )
-      when objtype in ~w{Question Answer ChatMessage Audio Video Event Article} do
-    data = Map.put(data, "object", strip_internal_fields(data["object"]))
+      when objtype in ~w{Question Answer ChatMessage Audio Video Event Article Note} do
+    fetch_options = Keyword.put(options, :depth, (options[:depth] || 0) + 1)
+
+    object =
+      data["object"]
+      |> strip_internal_fields()
+      |> fix_type(fetch_options)
+      |> fix_in_reply_to(fetch_options)
+
+    data = Map.put(data, "object", object)
+    options = Keyword.put(options, :local, false)
 
     with {:ok, %User{}} <- ObjectValidator.fetch_actor(data),
          nil <- Activity.get_create_by_object_ap_id(obj_id),
-         {:ok, activity, _} <- Pipeline.common_pipeline(data, local: false) do
+         {:ok, activity, _} <- Pipeline.common_pipeline(data, options) do
       {:ok, activity}
     else
       %Activity{} = activity -> {:ok, activity}
diff --git a/lib/pleroma/web/activity_pub/utils.ex b/lib/pleroma/web/activity_pub/utils.ex
index a4dc469dc..0d1a6d0f1 100644
--- a/lib/pleroma/web/activity_pub/utils.ex
+++ b/lib/pleroma/web/activity_pub/utils.ex
@@ -96,8 +96,11 @@ defmodule Pleroma.Web.ActivityPub.Utils do
         !label_in_collection?(ap_id, params["cc"])
 
     if need_splice? do
-      cc_list = extract_list(params["cc"])
-      Map.put(params, "cc", [ap_id | cc_list])
+      cc = [ap_id | extract_list(params["cc"])]
+
+      params
+      |> Map.put("cc", cc)
+      |> Maps.safe_put_in(["object", "cc"], cc)
     else
       params
     end
diff --git a/lib/pleroma/web/federator.ex b/lib/pleroma/web/federator.ex
index f5ef76d32..69cfc2d52 100644
--- a/lib/pleroma/web/federator.ex
+++ b/lib/pleroma/web/federator.ex
@@ -96,6 +96,11 @@ defmodule Pleroma.Web.Federator do
         Logger.debug("Unhandled actor #{actor}, #{inspect(e)}")
         {:error, e}
 
+      {:error, {:validate_object, _}} = e ->
+        Logger.error("Incoming AP doc validation error: #{inspect(e)}")
+        Logger.debug(Jason.encode!(params, pretty: true))
+        e
+
       e ->
         # Just drop those for now
         Logger.debug(fn -> "Unhandled activity\n" <> Jason.encode!(params, pretty: true) end)
diff --git a/test/fixtures/activitypub-client-post-activity.json b/test/fixtures/activitypub-client-post-activity.json
index c985e072b..e592081bc 100644
--- a/test/fixtures/activitypub-client-post-activity.json
+++ b/test/fixtures/activitypub-client-post-activity.json
@@ -3,6 +3,7 @@
   "type": "Create",
   "object": {
     "type": "Note",
+    "to": ["https://www.w3.org/ns/activitystreams#Public"],
     "content": "It's a note"
   },
   "to": ["https://www.w3.org/ns/activitystreams#Public"]
diff --git a/test/pleroma/activity_test.exs b/test/pleroma/activity_test.exs
index 962bc7e45..4f9144f91 100644
--- a/test/pleroma/activity_test.exs
+++ b/test/pleroma/activity_test.exs
@@ -123,7 +123,8 @@ defmodule Pleroma.ActivityTest do
           "type" => "Note",
           "content" => "find me!",
           "id" => "http://mastodon.example.org/users/admin/objects/1",
-          "attributedTo" => "http://mastodon.example.org/users/admin"
+          "attributedTo" => "http://mastodon.example.org/users/admin",
+          "to" => ["https://www.w3.org/ns/activitystreams#Public"]
         },
         "to" => ["https://www.w3.org/ns/activitystreams#Public"]
       }
@@ -132,6 +133,7 @@ defmodule Pleroma.ActivityTest do
       {:ok, japanese_activity} = Pleroma.Web.CommonAPI.post(user, %{status: "更新情報"})
       {:ok, job} = Pleroma.Web.Federator.incoming_ap_doc(params)
       {:ok, remote_activity} = ObanHelpers.perform(job)
+      remote_activity = Activity.get_by_id_with_object(remote_activity.id)
 
       %{
         japanese_activity: japanese_activity,
diff --git a/test/pleroma/ecto_type/activity_pub/object_validators/recipients_test.exs b/test/pleroma/ecto_type/activity_pub/object_validators/recipients_test.exs
index d3a2fd13f..4cdafa898 100644
--- a/test/pleroma/ecto_type/activity_pub/object_validators/recipients_test.exs
+++ b/test/pleroma/ecto_type/activity_pub/object_validators/recipients_test.exs
@@ -6,10 +6,10 @@ defmodule Pleroma.EctoType.ActivityPub.ObjectValidators.RecipientsTest do
   alias Pleroma.EctoType.ActivityPub.ObjectValidators.Recipients
   use Pleroma.DataCase, async: true
 
-  test "it asserts that all elements of the list are object ids" do
+  test "it only keeps elements that are valid object ids" do
     list = ["https://lain.com/users/lain", "invalid"]
 
-    assert :error == Recipients.cast(list)
+    assert {:ok, ["https://lain.com/users/lain"]} == Recipients.cast(list)
   end
 
   test "it works with a list" do
diff --git a/test/pleroma/notification_test.exs b/test/pleroma/notification_test.exs
index abf1b0410..85f895f0f 100644
--- a/test/pleroma/notification_test.exs
+++ b/test/pleroma/notification_test.exs
@@ -624,6 +624,8 @@ defmodule Pleroma.NotificationTest do
         "actor" => user.ap_id,
         "object" => %{
           "type" => "Note",
+          "id" => Pleroma.Web.ActivityPub.Utils.generate_object_id(),
+          "to" => ["https://www.w3.org/ns/activitystreams#Public"],
           "content" => "message with a Mention tag, but no explicit tagging",
           "tag" => [
             %{
@@ -655,6 +657,9 @@ defmodule Pleroma.NotificationTest do
         "actor" => user.ap_id,
         "object" => %{
           "type" => "Note",
+          "id" => Pleroma.Web.ActivityPub.Utils.generate_object_id(),
+          "to" => ["https://www.w3.org/ns/activitystreams#Public"],
+          "cc" => [other_user.ap_id],
           "content" => "hi everyone",
           "attributedTo" => user.ap_id
         }
@@ -951,6 +956,7 @@ defmodule Pleroma.NotificationTest do
         "cc" => [],
         "object" => %{
           "type" => "Note",
+          "id" => remote_user.ap_id <> "/objects/test",
           "content" => "Hello!",
           "tag" => [
             %{
diff --git a/test/pleroma/object/fetcher_test.exs b/test/pleroma/object/fetcher_test.exs
index a7ac90348..bd0a6e497 100644
--- a/test/pleroma/object/fetcher_test.exs
+++ b/test/pleroma/object/fetcher_test.exs
@@ -66,6 +66,14 @@ defmodule Pleroma.Object.FetcherTest do
           %Tesla.Env{
             status: 500
           }
+
+        %{
+          method: :get,
+          url: "https://stereophonic.space/objects/02997b83-3ea7-4b63-94af-ef3aa2d4ed17"
+        } ->
+          %Tesla.Env{
+            status: 500
+          }
       end)
 
       :ok
@@ -124,8 +132,7 @@ defmodule Pleroma.Object.FetcherTest do
       {:ok, object} =
         Fetcher.fetch_object_from_id("http://mastodon.example.org/@admin/99541947525187367")
 
-      assert activity = Activity.get_create_by_object_ap_id(object.data["id"])
-      assert activity.data["id"]
+      assert _activity = Activity.get_create_by_object_ap_id(object.data["id"])
 
       {:ok, object_again} =
         Fetcher.fetch_object_from_id("http://mastodon.example.org/@admin/99541947525187367")
diff --git a/test/pleroma/web/activity_pub/activity_pub_controller_test.exs b/test/pleroma/web/activity_pub/activity_pub_controller_test.exs
index c1e13c7cb..c7039d1f8 100644
--- a/test/pleroma/web/activity_pub/activity_pub_controller_test.exs
+++ b/test/pleroma/web/activity_pub/activity_pub_controller_test.exs
@@ -539,7 +539,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubControllerTest do
         File.read!("test/fixtures/mastodon-post-activity.json")
         |> Jason.decode!()
         |> Map.put("actor", user.ap_id)
-        |> put_in(["object", "attridbutedTo"], user.ap_id)
+        |> put_in(["object", "attributedTo"], user.ap_id)
 
       conn =
         conn
@@ -829,7 +829,11 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubControllerTest do
 
     test "it inserts an incoming activity into the database", %{conn: conn, data: data} do
       user = insert(:user)
-      data = Map.put(data, "bcc", [user.ap_id])
+
+      data =
+        data
+        |> Map.put("bcc", [user.ap_id])
+        |> Kernel.put_in(["object", "bcc"], [user.ap_id])
 
       conn =
         conn
@@ -846,8 +850,11 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubControllerTest do
       user = insert(:user)
 
       data =
-        Map.put(data, "to", user.ap_id)
-        |> Map.delete("cc")
+        data
+        |> Map.put("to", user.ap_id)
+        |> Map.put("cc", [])
+        |> Kernel.put_in(["object", "to"], user.ap_id)
+        |> Kernel.put_in(["object", "cc"], [])
 
       conn =
         conn
@@ -864,8 +871,11 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubControllerTest do
       user = insert(:user)
 
       data =
-        Map.put(data, "cc", user.ap_id)
-        |> Map.delete("to")
+        data
+        |> Map.put("to", [])
+        |> Map.put("cc", user.ap_id)
+        |> Kernel.put_in(["object", "to"], [])
+        |> Kernel.put_in(["object", "cc"], user.ap_id)
 
       conn =
         conn
@@ -883,9 +893,13 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubControllerTest do
       user = insert(:user)
 
       data =
-        Map.put(data, "bcc", user.ap_id)
-        |> Map.delete("to")
-        |> Map.delete("cc")
+        data
+        |> Map.put("to", [])
+        |> Map.put("cc", [])
+        |> Map.put("bcc", user.ap_id)
+        |> Kernel.put_in(["object", "to"], [])
+        |> Kernel.put_in(["object", "cc"], [])
+        |> Kernel.put_in(["object", "bcc"], user.ap_id)
 
       conn =
         conn
@@ -1000,29 +1014,34 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubControllerTest do
       assert Instances.reachable?(sender_host)
     end
 
+    @tag capture_log: true
     test "it removes all follower collections but actor's", %{conn: conn} do
       [actor, recipient] = insert_pair(:user)
 
-      data =
-        File.read!("test/fixtures/activitypub-client-post-activity.json")
-        |> Jason.decode!()
+      to = [
+        recipient.ap_id,
+        recipient.follower_address,
+        "https://www.w3.org/ns/activitystreams#Public"
+      ]
 
-      object = Map.put(data["object"], "attributedTo", actor.ap_id)
+      cc = [recipient.follower_address, actor.follower_address]
 
-      data =
-        data
-        |> Map.put("id", Utils.generate_object_id())
-        |> Map.put("actor", actor.ap_id)
-        |> Map.put("object", object)
-        |> Map.put("cc", [
-          recipient.follower_address,
-          actor.follower_address
-        ])
-        |> Map.put("to", [
-          recipient.ap_id,
-          recipient.follower_address,
-          "https://www.w3.org/ns/activitystreams#Public"
-        ])
+      data = %{
+        "@context" => ["https://www.w3.org/ns/activitystreams"],
+        "type" => "Create",
+        "id" => Utils.generate_activity_id(),
+        "to" => to,
+        "cc" => cc,
+        "actor" => actor.ap_id,
+        "object" => %{
+          "type" => "Note",
+          "to" => to,
+          "cc" => cc,
+          "content" => "It's a note",
+          "attributedTo" => actor.ap_id,
+          "id" => Utils.generate_object_id()
+        }
+      }
 
       conn
       |> assign(:valid_signature, true)
@@ -1032,7 +1051,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubControllerTest do
 
       ObanHelpers.perform(all_enqueued(worker: ReceiverWorker))
 
-      activity = Activity.get_by_ap_id(data["id"])
+      assert activity = Activity.get_by_ap_id(data["id"])
 
       assert activity.id
       assert actor.follower_address in activity.recipients
@@ -1164,7 +1183,6 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubControllerTest do
         "actor" => remote_actor,
         "content" => "test report",
         "id" => "https://#{remote_domain}/e3b12fd1-948c-446e-b93b-a5e67edbe1d8",
-        "nickname" => reported_user.nickname,
         "object" => [
           reported_user.ap_id,
           note.data["object"]
diff --git a/test/pleroma/web/activity_pub/transmogrifier/audio_handling_test.exs b/test/pleroma/web/activity_pub/transmogrifier/audio_handling_test.exs
index a21e9e3d3..a929f828d 100644
--- a/test/pleroma/web/activity_pub/transmogrifier/audio_handling_test.exs
+++ b/test/pleroma/web/activity_pub/transmogrifier/audio_handling_test.exs
@@ -24,6 +24,8 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier.AudioHandlingTest do
       "actor" => "http://mastodon.example.org/users/admin",
       "object" => %{
         "type" => "Audio",
+        "to" => ["https://www.w3.org/ns/activitystreams#Public"],
+        "cc" => [],
         "id" => "http://mastodon.example.org/users/admin/listens/1234",
         "attributedTo" => "http://mastodon.example.org/users/admin",
         "title" => "lain radio episode 1",
@@ -61,7 +63,9 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier.AudioHandlingTest do
 
     assert object.data["to"] == ["https://www.w3.org/ns/activitystreams#Public"]
 
-    assert object.data["cc"] == []
+    assert object.data["cc"] == [
+             "https://channels.tests.funkwhale.audio/federation/actors/compositions/followers"
+           ]
 
     assert object.data["url"] == "https://channels.tests.funkwhale.audio/library/tracks/74"
 
diff --git a/test/pleroma/web/activity_pub/transmogrifier/event_handling_test.exs b/test/pleroma/web/activity_pub/transmogrifier/event_handling_test.exs
index c4879fda1..14f5f704a 100644
--- a/test/pleroma/web/activity_pub/transmogrifier/event_handling_test.exs
+++ b/test/pleroma/web/activity_pub/transmogrifier/event_handling_test.exs
@@ -31,7 +31,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier.EventHandlingTest do
              )
 
     assert object.data["to"] == ["https://www.w3.org/ns/activitystreams#Public"]
-    assert object.data["cc"] == []
+    assert object.data["cc"] == ["https://mobilizon.org/@tcit/followers"]
 
     assert object.data["url"] ==
              "https://mobilizon.org/events/252d5816-00a3-4a89-a66f-15bf65c33e39"
diff --git a/test/pleroma/web/activity_pub/transmogrifier/note_handling_test.exs b/test/pleroma/web/activity_pub/transmogrifier/note_handling_test.exs
index deb956410..1846b2291 100644
--- a/test/pleroma/web/activity_pub/transmogrifier/note_handling_test.exs
+++ b/test/pleroma/web/activity_pub/transmogrifier/note_handling_test.exs
@@ -10,11 +10,11 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier.NoteHandlingTest do
   alias Pleroma.Object
   alias Pleroma.User
   alias Pleroma.Web.ActivityPub.Transmogrifier
+  alias Pleroma.Web.ActivityPub.Utils
   alias Pleroma.Web.CommonAPI
 
   import Mock
   import Pleroma.Factory
-  import ExUnit.CaptureLog
 
   setup_all do
     Tesla.Mock.mock_global(fn env -> apply(HttpRequestMock, :request, [env]) end)
@@ -43,36 +43,6 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier.NoteHandlingTest do
       assert Object.hashtags(object) == ["test"]
     end
 
-    test "it cleans up incoming notices which are not really DMs" do
-      user = insert(:user)
-      other_user = insert(:user)
-
-      to = [user.ap_id, other_user.ap_id]
-
-      data =
-        File.read!("test/fixtures/mastodon-post-activity.json")
-        |> Jason.decode!()
-        |> Map.put("to", to)
-        |> Map.put("cc", [])
-
-      object =
-        data["object"]
-        |> Map.put("to", to)
-        |> Map.put("cc", [])
-
-      data = Map.put(data, "object", object)
-
-      {:ok, %Activity{data: data, local: false} = activity} = Transmogrifier.handle_incoming(data)
-
-      assert data["to"] == []
-      assert data["cc"] == to
-
-      object_data = Object.normalize(activity, fetch: false).data
-
-      assert object_data["to"] == []
-      assert object_data["cc"] == to
-    end
-
     test "it ignores an incoming notice if we already have it" do
       activity = insert(:note_activity)
 
@@ -147,9 +117,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier.NoteHandlingTest do
         data
         |> Map.put("object", object)
 
-      assert capture_log(fn ->
-               {:ok, _returned_activity} = Transmogrifier.handle_incoming(data)
-             end) =~ "[warn] Couldn't fetch \"https://404.site/whatever\", error: nil"
+      assert {:ok, _returned_activity} = Transmogrifier.handle_incoming(data)
     end
 
     test "it does not work for deactivated users" do
@@ -174,8 +142,8 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier.NoteHandlingTest do
       assert data["to"] == ["https://www.w3.org/ns/activitystreams#Public"]
 
       assert data["cc"] == [
-               "http://mastodon.example.org/users/admin/followers",
-               "http://localtesting.pleroma.lol/users/lain"
+               "http://localtesting.pleroma.lol/users/lain",
+               "http://mastodon.example.org/users/admin/followers"
              ]
 
       assert data["actor"] == "http://mastodon.example.org/users/admin"
@@ -188,8 +156,8 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier.NoteHandlingTest do
       assert object_data["to"] == ["https://www.w3.org/ns/activitystreams#Public"]
 
       assert object_data["cc"] == [
-               "http://mastodon.example.org/users/admin/followers",
-               "http://localtesting.pleroma.lol/users/lain"
+               "http://localtesting.pleroma.lol/users/lain",
+               "http://mastodon.example.org/users/admin/followers"
              ]
 
       assert object_data["actor"] == "http://mastodon.example.org/users/admin"
@@ -221,8 +189,25 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier.NoteHandlingTest do
       {:ok, %Activity{data: data, local: false}} = Transmogrifier.handle_incoming(data)
       object = Object.normalize(data["object"], fetch: false)
 
-      assert Enum.at(Object.tags(object), 2) == "moo"
-      assert Object.hashtags(object) == ["moo"]
+      assert match?(
+               %{
+                 "href" => "http://localtesting.pleroma.lol/users/lain",
+                 "name" => "@lain@localtesting.pleroma.lol",
+                 "type" => "Mention"
+               },
+               Enum.at(object.data["tag"], 0)
+             )
+
+      assert match?(
+               %{
+                 "href" => "http://mastodon.example.org/tags/moo",
+                 "name" => "#moo",
+                 "type" => "Hashtag"
+               },
+               Enum.at(object.data["tag"], 1)
+             )
+
+      assert "moo" == Enum.at(object.data["tag"], 2)
     end
 
     test "it works for incoming notices with contentMap" do
@@ -276,13 +261,11 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier.NoteHandlingTest do
         File.read!("test/fixtures/mastodon-post-activity.json")
         |> Jason.decode!()
         |> Map.put("actor", user.ap_id)
-        |> Map.put("to", nil)
         |> Map.put("cc", nil)
 
       object =
         data["object"]
         |> Map.put("attributedTo", user.ap_id)
-        |> Map.put("to", nil)
         |> Map.put("cc", nil)
         |> Map.put("id", user.ap_id <> "/activities/12345678")
 
@@ -290,8 +273,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier.NoteHandlingTest do
 
       {:ok, %Activity{data: data, local: false}} = Transmogrifier.handle_incoming(data)
 
-      assert !is_nil(data["to"])
-      assert !is_nil(data["cc"])
+      refute is_nil(data["cc"])
     end
 
     test "it strips internal likes" do
@@ -310,9 +292,11 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier.NoteHandlingTest do
       object = Map.put(data["object"], "likes", likes)
       data = Map.put(data, "object", object)
 
-      {:ok, %Activity{object: object}} = Transmogrifier.handle_incoming(data)
+      {:ok, %Activity{} = activity} = Transmogrifier.handle_incoming(data)
+
+      object = Object.normalize(activity)
 
-      refute Map.has_key?(object.data, "likes")
+      assert object.data["likes"] == []
     end
 
     test "it strips internal reactions" do
@@ -330,70 +314,46 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier.NoteHandlingTest do
     end
 
     test "it correctly processes messages with non-array to field" do
-      user = insert(:user)
+      data =
+        File.read!("test/fixtures/mastodon-post-activity.json")
+        |> Poison.decode!()
+        |> Map.put("to", "https://www.w3.org/ns/activitystreams#Public")
+        |> put_in(["object", "to"], "https://www.w3.org/ns/activitystreams#Public")
 
-      message = %{
-        "@context" => "https://www.w3.org/ns/activitystreams",
-        "to" => "https://www.w3.org/ns/activitystreams#Public",
-        "type" => "Create",
-        "object" => %{
-          "content" => "blah blah blah",
-          "type" => "Note",
-          "attributedTo" => user.ap_id,
-          "inReplyTo" => nil
-        },
-        "actor" => user.ap_id
-      }
+      assert {:ok, activity} = Transmogrifier.handle_incoming(data)
 
-      assert {:ok, activity} = Transmogrifier.handle_incoming(message)
+      assert [
+               "http://localtesting.pleroma.lol/users/lain",
+               "http://mastodon.example.org/users/admin/followers"
+             ] == activity.data["cc"]
 
       assert ["https://www.w3.org/ns/activitystreams#Public"] == activity.data["to"]
     end
 
     test "it correctly processes messages with non-array cc field" do
-      user = insert(:user)
-
-      message = %{
-        "@context" => "https://www.w3.org/ns/activitystreams",
-        "to" => user.follower_address,
-        "cc" => "https://www.w3.org/ns/activitystreams#Public",
-        "type" => "Create",
-        "object" => %{
-          "content" => "blah blah blah",
-          "type" => "Note",
-          "attributedTo" => user.ap_id,
-          "inReplyTo" => nil
-        },
-        "actor" => user.ap_id
-      }
+      data =
+        File.read!("test/fixtures/mastodon-post-activity.json")
+        |> Poison.decode!()
+        |> Map.put("cc", "http://mastodon.example.org/users/admin/followers")
+        |> put_in(["object", "cc"], "http://mastodon.example.org/users/admin/followers")
 
-      assert {:ok, activity} = Transmogrifier.handle_incoming(message)
+      assert {:ok, activity} = Transmogrifier.handle_incoming(data)
 
-      assert ["https://www.w3.org/ns/activitystreams#Public"] == activity.data["cc"]
-      assert [user.follower_address] == activity.data["to"]
+      assert ["http://mastodon.example.org/users/admin/followers"] == activity.data["cc"]
+      assert ["https://www.w3.org/ns/activitystreams#Public"] == activity.data["to"]
     end
 
     test "it correctly processes messages with weirdness in address fields" do
-      user = insert(:user)
-
-      message = %{
-        "@context" => "https://www.w3.org/ns/activitystreams",
-        "to" => [nil, user.follower_address],
-        "cc" => ["https://www.w3.org/ns/activitystreams#Public", ["¿"]],
-        "type" => "Create",
-        "object" => %{
-          "content" => "…",
-          "type" => "Note",
-          "attributedTo" => user.ap_id,
-          "inReplyTo" => nil
-        },
-        "actor" => user.ap_id
-      }
+      data =
+        File.read!("test/fixtures/mastodon-post-activity.json")
+        |> Poison.decode!()
+        |> Map.put("cc", ["http://mastodon.example.org/users/admin/followers", ["¿"]])
+        |> put_in(["object", "cc"], ["http://mastodon.example.org/users/admin/followers", ["¿"]])
 
-      assert {:ok, activity} = Transmogrifier.handle_incoming(message)
+      assert {:ok, activity} = Transmogrifier.handle_incoming(data)
 
-      assert ["https://www.w3.org/ns/activitystreams#Public"] == activity.data["cc"]
-      assert [user.follower_address] == activity.data["to"]
+      assert ["http://mastodon.example.org/users/admin/followers"] == activity.data["cc"]
+      assert ["https://www.w3.org/ns/activitystreams#Public"] == activity.data["to"]
     end
   end
 
@@ -419,7 +379,11 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier.NoteHandlingTest do
     } do
       clear_config([:instance, :federation_incoming_replies_max_depth], 10)
 
-      {:ok, _activity} = Transmogrifier.handle_incoming(data)
+      {:ok, activity} = Transmogrifier.handle_incoming(data)
+
+      object = Object.normalize(activity.data["object"])
+
+      assert object.data["replies"] == items
 
       for id <- items do
         job_args = %{"op" => "fetch_remote", "id" => id, "depth" => 1}
@@ -442,45 +406,38 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier.NoteHandlingTest do
     setup do: clear_config([:instance, :federation_incoming_replies_max_depth])
 
     setup do
-      user = insert(:user)
-
-      {:ok, activity} = CommonAPI.post(user, %{status: "post1"})
-
-      {:ok, reply1} =
-        CommonAPI.post(user, %{status: "reply1", in_reply_to_status_id: activity.id})
-
-      {:ok, reply2} =
-        CommonAPI.post(user, %{status: "reply2", in_reply_to_status_id: activity.id})
-
-      replies_uris = Enum.map([reply1, reply2], fn a -> a.object.data["id"] end)
-
-      {:ok, federation_output} = Transmogrifier.prepare_outgoing(activity.data)
+      replies = %{
+        "type" => "Collection",
+        "items" => [Utils.generate_object_id(), Utils.generate_object_id()]
+      }
 
-      Repo.delete(activity.object)
-      Repo.delete(activity)
+      activity =
+        File.read!("test/fixtures/mastodon-post-activity.json")
+        |> Poison.decode!()
+        |> Kernel.put_in(["object", "replies"], replies)
 
-      %{federation_output: federation_output, replies_uris: replies_uris}
+      %{activity: activity}
     end
 
     test "schedules background fetching of `replies` items if max thread depth limit allows", %{
-      federation_output: federation_output,
-      replies_uris: replies_uris
+      activity: activity
     } do
       clear_config([:instance, :federation_incoming_replies_max_depth], 1)
 
-      {:ok, _activity} = Transmogrifier.handle_incoming(federation_output)
+      assert {:ok, %Activity{data: data, local: false}} = Transmogrifier.handle_incoming(activity)
+      object = Object.normalize(data["object"])
 
-      for id <- replies_uris do
+      for id <- object.data["replies"] do
         job_args = %{"op" => "fetch_remote", "id" => id, "depth" => 1}
         assert_enqueued(worker: Pleroma.Workers.RemoteFetcherWorker, args: job_args)
       end
     end
 
     test "does NOT schedule background fetching of `replies` beyond max thread depth limit allows",
-         %{federation_output: federation_output} do
+         %{activity: activity} do
       clear_config([:instance, :federation_incoming_replies_max_depth], 0)
 
-      {:ok, _activity} = Transmogrifier.handle_incoming(federation_output)
+      {:ok, _activity} = Transmogrifier.handle_incoming(activity)
 
       assert all_enqueued(worker: Pleroma.Workers.RemoteFetcherWorker) == []
     end
@@ -498,6 +455,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier.NoteHandlingTest do
         "object" => %{
           "to" => ["https://www.w3.org/ns/activitystreams#Public"],
           "cc" => [],
+          "id" => Utils.generate_object_id(),
           "type" => "Note",
           "content" => "Hi",
           "inReplyTo" => nil,
@@ -522,6 +480,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier.NoteHandlingTest do
         "object" => %{
           "to" => ["https://www.w3.org/ns/activitystreams#Public"],
           "cc" => [],
+          "id" => Utils.generate_object_id(),
           "type" => "Note",
           "content" => "Hi",
           "inReplyTo" => nil,
diff --git a/test/pleroma/web/activity_pub/transmogrifier_test.exs b/test/pleroma/web/activity_pub/transmogrifier_test.exs
index 4c3fcb44a..5a3b57acb 100644
--- a/test/pleroma/web/activity_pub/transmogrifier_test.exs
+++ b/test/pleroma/web/activity_pub/transmogrifier_test.exs
@@ -11,6 +11,7 @@ defmodule Pleroma.Web.ActivityPub.TransmogrifierTest do
   alias Pleroma.Tests.ObanHelpers
   alias Pleroma.User
   alias Pleroma.Web.ActivityPub.Transmogrifier
+  alias Pleroma.Web.ActivityPub.Utils
   alias Pleroma.Web.AdminAPI.AccountView
   alias Pleroma.Web.CommonAPI
 
@@ -159,8 +160,7 @@ defmodule Pleroma.Web.ActivityPub.TransmogrifierTest do
       {:ok, activity} = CommonAPI.post(user, %{status: "hey"})
       {:ok, modified} = Transmogrifier.prepare_outgoing(activity.data)
 
-      assert modified["@context"] ==
-               Pleroma.Web.ActivityPub.Utils.make_json_ld_header()["@context"]
+      assert modified["@context"] == Utils.make_json_ld_header()["@context"]
 
       assert modified["object"]["conversation"] == modified["context"]
     end
@@ -446,7 +446,7 @@ defmodule Pleroma.Web.ActivityPub.TransmogrifierTest do
           end)
       }
 
-      fixed_object = Transmogrifier.fix_explicit_addressing(object)
+      fixed_object = Transmogrifier.fix_explicit_addressing(object, user.follower_address)
       assert Enum.all?(explicitly_mentioned_actors, &(&1 in fixed_object["to"]))
       refute "https://social.beepboop.ga/users/dirb" in fixed_object["to"]
       assert "https://social.beepboop.ga/users/dirb" in fixed_object["cc"]
@@ -459,7 +459,7 @@ defmodule Pleroma.Web.ActivityPub.TransmogrifierTest do
         "cc" => []
       }
 
-      fixed_object = Transmogrifier.fix_explicit_addressing(object)
+      fixed_object = Transmogrifier.fix_explicit_addressing(object, user.follower_address)
       assert user.follower_address in fixed_object["to"]
       refute user.follower_address in fixed_object["cc"]
     end
@@ -473,7 +473,7 @@ defmodule Pleroma.Web.ActivityPub.TransmogrifierTest do
         "cc" => [user.follower_address, recipient.follower_address]
       }
 
-      fixed_object = Transmogrifier.fix_explicit_addressing(object)
+      fixed_object = Transmogrifier.fix_explicit_addressing(object, user.follower_address)
 
       assert user.follower_address in fixed_object["cc"]
       refute recipient.follower_address in fixed_object["cc"]
diff --git a/test/pleroma/web/common_api_test.exs b/test/pleroma/web/common_api_test.exs
index be94c93c2..cc4ab213a 100644
--- a/test/pleroma/web/common_api_test.exs
+++ b/test/pleroma/web/common_api_test.exs
@@ -539,8 +539,8 @@ defmodule Pleroma.Web.CommonAPITest do
           spoiler_text: ":joker_smile:"
         })
 
-      assert Object.normalize(reply_activity).data["emoji"][":joker_smile:"]
-      refute Object.normalize(reply_activity).data["emoji"][":joker_disapprove:"]
+      assert Object.normalize(reply_activity).data["emoji"]["joker_smile"]
+      refute Object.normalize(reply_activity).data["emoji"]["joker_disapprove"]
     end
 
     test "deactivated users can't post" do
diff --git a/test/pleroma/web/federator_test.exs b/test/pleroma/web/federator_test.exs
index 532ee6d30..372b6a73a 100644
--- a/test/pleroma/web/federator_test.exs
+++ b/test/pleroma/web/federator_test.exs
@@ -123,7 +123,8 @@ defmodule Pleroma.Web.FederatorTest do
           "type" => "Note",
           "content" => "hi world!",
           "id" => "http://mastodon.example.org/users/admin/objects/1",
-          "attributedTo" => "http://mastodon.example.org/users/admin"
+          "attributedTo" => "http://mastodon.example.org/users/admin",
+          "to" => ["https://www.w3.org/ns/activitystreams#Public"]
         },
         "to" => ["https://www.w3.org/ns/activitystreams#Public"]
       }
@@ -145,7 +146,8 @@ defmodule Pleroma.Web.FederatorTest do
           "type" => "Note",
           "content" => "hi world!",
           "id" => "http://mastodon.example.org/users/admin/objects/1",
-          "attributedTo" => "http://mastodon.example.org/users/admin"
+          "attributedTo" => "http://mastodon.example.org/users/admin",
+          "to" => ["https://www.w3.org/ns/activitystreams#Public"]
         },
         "to" => ["https://www.w3.org/ns/activitystreams#Public"]
       }
diff --git a/test/pleroma/web/static_fe/static_fe_controller_test.exs b/test/pleroma/web/static_fe/static_fe_controller_test.exs
index 2af14dfeb..5752cffda 100644
--- a/test/pleroma/web/static_fe/static_fe_controller_test.exs
+++ b/test/pleroma/web/static_fe/static_fe_controller_test.exs
@@ -7,6 +7,7 @@ defmodule Pleroma.Web.StaticFE.StaticFEControllerTest do
 
   alias Pleroma.Activity
   alias Pleroma.Web.ActivityPub.Transmogrifier
+  alias Pleroma.Web.ActivityPub.Utils
   alias Pleroma.Web.CommonAPI
 
   import Pleroma.Factory
@@ -185,16 +186,16 @@ defmodule Pleroma.Web.StaticFE.StaticFEControllerTest do
     test "302 for remote cached status", %{conn: conn, user: user} do
       message = %{
         "@context" => "https://www.w3.org/ns/activitystreams",
-        "to" => user.follower_address,
-        "cc" => "https://www.w3.org/ns/activitystreams#Public",
         "type" => "Create",
+        "actor" => user.ap_id,
         "object" => %{
+          "to" => user.follower_address,
+          "cc" => "https://www.w3.org/ns/activitystreams#Public",
+          "id" => Utils.generate_object_id(),
           "content" => "blah blah blah",
           "type" => "Note",
-          "attributedTo" => user.ap_id,
-          "inReplyTo" => nil
-        },
-        "actor" => user.ap_id
+          "attributedTo" => user.ap_id
+        }
       }
 
       assert {:ok, activity} = Transmogrifier.handle_incoming(message)