Merge branch 'remake-remodel' into develop
[akkoma] / lib / pleroma / web / activity_pub / transmogrifier.ex
index 6603e4929d50c384f2ee122426515f7433f3e3d8..dbb14e9aa2be8e0f76a3e7283cf777affb085265 100644 (file)
@@ -1,5 +1,5 @@
 # Pleroma: A lightweight social networking server
-# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.ActivityPub.Transmogrifier do
@@ -159,10 +159,11 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
       when not is_nil(in_reply_to) do
     in_reply_to_id = prepare_in_reply_to(in_reply_to)
     object = Map.put(object, "inReplyToAtomUri", in_reply_to_id)
+    depth = (options[:depth] || 0) + 1
 
-    if Federator.allowed_incoming_reply_depth?(options[:depth]) do
+    if Federator.allowed_thread_distance?(depth) do
       with {:ok, replied_object} <- get_obj_helper(in_reply_to_id, options),
-           %Activity{} = _ <- Activity.get_create_by_object_ap_id(replied_object.data["id"]) do
+           %Activity{} <- Activity.get_create_by_object_ap_id(replied_object.data["id"]) do
         object
         |> Map.put("inReplyTo", replied_object.data["id"])
         |> Map.put("inReplyToAtomUri", object["inReplyToAtomUri"] || in_reply_to_id)
@@ -315,7 +316,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
 
   def fix_type(%{"inReplyTo" => reply_id, "name" => _} = object, options)
       when is_binary(reply_id) do
-    with true <- Federator.allowed_incoming_reply_depth?(options[:depth]),
+    with true <- Federator.allowed_thread_distance?(options[:depth]),
          {:ok, %{data: %{"type" => "Question"} = _} = _} <- get_obj_helper(reply_id, options) do
       Map.put(object, "type", "Answer")
     else
@@ -390,7 +391,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
   def handle_incoming(%{"id" => nil}, _options), do: :error
   def handle_incoming(%{"id" => ""}, _options), do: :error
   # length of https:// = 8, should validate better, but good enough for now.
-  def handle_incoming(%{"id" => id}, _options) when not (is_binary(id) and length(id) > 8),
+  def handle_incoming(%{"id" => id}, _options) when is_binary(id) and byte_size(id) < 8,
     do: :error
 
   # TODO: validate those with a Ecto scheme
@@ -400,7 +401,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
         %{"type" => "Create", "object" => %{"type" => objtype} = object} = data,
         options
       )
-      when objtype in ["Article", "Note", "Video", "Page", "Question", "Answer"] do
+      when objtype in ["Article", "Event", "Note", "Video", "Page", "Question", "Answer"] do
     actor = Containment.get_actor(data)
 
     data =
@@ -409,8 +410,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
 
     with nil <- Activity.get_create_by_object_ap_id(object["id"]),
          {:ok, %User{} = user} <- User.get_or_fetch_by_ap_id(data["actor"]) do
-      options = Keyword.put(options, :depth, (options[:depth] || 0) + 1)
-      object = fix_object(data["object"], options)
+      object = fix_object(object, options)
 
       params = %{
         to: data["to"],
@@ -427,7 +427,20 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
           ])
       }
 
-      ActivityPub.create(params)
+      with {:ok, created_activity} <- ActivityPub.create(params) do
+        reply_depth = (options[:depth] || 0) + 1
+
+        if Federator.allowed_thread_distance?(reply_depth) do
+          for reply_id <- replies(object) do
+            Pleroma.Workers.RemoteFetcherWorker.enqueue("fetch_remote", %{
+              "id" => reply_id,
+              "depth" => reply_depth
+            })
+          end
+        end
+
+        {:ok, created_activity}
+      end
     else
       %Activity{} = activity -> {:ok, activity}
       _e -> :error
@@ -445,7 +458,8 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
       |> fix_addressing
 
     with {:ok, %User{} = user} <- User.get_or_fetch_by_ap_id(data["actor"]) do
-      options = Keyword.put(options, :depth, (options[:depth] || 0) + 1)
+      reply_depth = (options[:depth] || 0) + 1
+      options = Keyword.put(options, :depth, reply_depth)
       object = fix_object(object, options)
 
       params = %{
@@ -583,7 +597,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     "star" => "⭐"
   }
 
-  @doc "Rewrite misskey likes into EmojiReactions"
+  @doc "Rewrite misskey likes into EmojiReacts"
   def handle_incoming(
         %{
           "type" => "Like",
@@ -592,7 +606,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
         options
       ) do
     data
-    |> Map.put("type", "EmojiReaction")
+    |> Map.put("type", "EmojiReact")
     |> Map.put("content", @misskey_reactions[reaction] || reaction)
     |> handle_incoming(options)
   end
@@ -617,7 +631,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
 
   def handle_incoming(
         %{
-          "type" => "EmojiReaction",
+          "type" => "EmojiReact",
           "object" => object_id,
           "actor" => _actor,
           "id" => id,
@@ -665,24 +679,8 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     with %User{ap_id: ^actor_id} = actor <- User.get_cached_by_ap_id(object["id"]) do
       {:ok, new_user_data} = ActivityPub.user_data_from_user_object(object)
 
-      locked = new_user_data[:locked] || false
-      attachment = get_in(new_user_data, [:source_data, "attachment"]) || []
-      invisible = new_user_data[:invisible] || false
-
-      fields =
-        attachment
-        |> Enum.filter(fn %{"type" => t} -> t == "PropertyValue" end)
-        |> Enum.map(fn fields -> Map.take(fields, ["name", "value"]) end)
-
-      update_data =
-        new_user_data
-        |> Map.take([:avatar, :banner, :bio, :name, :also_known_as])
-        |> Map.put(:fields, fields)
-        |> Map.put(:locked, locked)
-        |> Map.put(:invisible, invisible)
-
       actor
-      |> User.upgrade_changeset(update_data, true)
+      |> User.upgrade_changeset(new_user_data, true)
       |> User.update_and_set_cache()
 
       ActivityPub.update(%{
@@ -774,7 +772,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
   def handle_incoming(
         %{
           "type" => "Undo",
-          "object" => %{"type" => "EmojiReaction", "id" => reaction_activity_id},
+          "object" => %{"type" => "EmojiReact", "id" => reaction_activity_id},
           "actor" => _actor,
           "id" => id
         } = data,
@@ -926,6 +924,50 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
 
   def set_reply_to_uri(obj), do: obj
 
+  @doc """
+  Serialized Mastodon-compatible `replies` collection containing _self-replies_.
+  Based on Mastodon's ActivityPub::NoteSerializer#replies.
+  """
+  def set_replies(obj_data) do
+    replies_uris =
+      with limit when limit > 0 <-
+             Pleroma.Config.get([:activitypub, :note_replies_output_limit], 0),
+           %Object{} = object <- Object.get_cached_by_ap_id(obj_data["id"]) do
+        object
+        |> Object.self_replies()
+        |> select([o], fragment("?->>'id'", o.data))
+        |> limit(^limit)
+        |> Repo.all()
+      else
+        _ -> []
+      end
+
+    set_replies(obj_data, replies_uris)
+  end
+
+  defp set_replies(obj, []) do
+    obj
+  end
+
+  defp set_replies(obj, replies_uris) do
+    replies_collection = %{
+      "type" => "Collection",
+      "items" => replies_uris
+    }
+
+    Map.merge(obj, %{"replies" => replies_collection})
+  end
+
+  def replies(%{"replies" => %{"first" => %{"items" => items}}}) when not is_nil(items) do
+    items
+  end
+
+  def replies(%{"replies" => %{"items" => items}}) when not is_nil(items) do
+    items
+  end
+
+  def replies(_), do: []
+
   # Prepares the object of an outgoing create activity.
   def prepare_object(object) do
     object
@@ -937,6 +979,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     |> prepare_attachments
     |> set_conversation
     |> set_reply_to_uri
+    |> set_replies
     |> strip_internal_fields
     |> strip_internal_tags
     |> set_type