964 lines
		
	
	
	
		
			27 KiB
		
	
	
	
		
			Elixir
		
	
	
	
	
	
			
		
		
	
	
			964 lines
		
	
	
	
		
			27 KiB
		
	
	
	
		
			Elixir
		
	
	
	
	
	
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.ActivityPub.Transmogrifier do
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  @moduledoc """
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  A module to handle coding from internal to wire ActivityPub and back.
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  """
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  alias Pleroma.Activity
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  alias Pleroma.EctoType.ActivityPub.ObjectValidators
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  alias Pleroma.Maps
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  alias Pleroma.Object
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  alias Pleroma.Object.Containment
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  alias Pleroma.Repo
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  alias Pleroma.User
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  alias Pleroma.Web.ActivityPub.ActivityPub
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  alias Pleroma.Web.ActivityPub.Builder
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  alias Pleroma.Web.ActivityPub.ObjectValidator
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  alias Pleroma.Web.ActivityPub.Pipeline
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  alias Pleroma.Web.ActivityPub.Utils
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  alias Pleroma.Web.ActivityPub.Visibility
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  alias Pleroma.Web.Federator
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  alias Pleroma.Workers.TransmogrifierWorker
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  import Ecto.Query
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  require Logger
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  require Pleroma.Constants
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  @doc """
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  Modifies an incoming AP object (mastodon format) to our internal format.
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  """
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  def fix_object(object, options \\ []) do
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    object
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    |> strip_internal_fields()
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    |> fix_actor()
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    |> fix_url()
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    |> fix_attachments()
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    |> fix_context()
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    |> fix_in_reply_to(options)
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    |> fix_emoji()
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    |> fix_tag()
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    |> fix_content_map()
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    |> fix_addressing()
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    |> fix_summary()
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  end
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  def fix_summary(%{"summary" => nil} = object) do
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    Map.put(object, "summary", "")
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  end
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  def fix_summary(%{"summary" => _} = object) do
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    # summary is present, nothing to do
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    object
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  end
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  def fix_summary(object), do: Map.put(object, "summary", "")
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  def fix_addressing_list(map, field) do
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    addrs = map[field]
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    cond do
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      is_list(addrs) ->
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        Map.put(map, field, Enum.filter(addrs, &is_binary/1))
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      is_binary(addrs) ->
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        Map.put(map, field, [addrs])
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      true ->
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        Map.put(map, field, [])
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    end
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  end
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  # if directMessage flag is set to true, leave the addressing alone
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  def fix_explicit_addressing(%{"directMessage" => true} = object, _follower_collection),
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    do: object
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  def fix_explicit_addressing(%{"to" => to, "cc" => cc} = object, follower_collection) do
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    explicit_mentions =
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      Utils.determine_explicit_mentions(object) ++
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        [Pleroma.Constants.as_public(), follower_collection]
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    explicit_to = Enum.filter(to, fn x -> x in explicit_mentions end)
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    explicit_cc = Enum.filter(to, fn x -> x not in explicit_mentions end)
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    final_cc =
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      (cc ++ explicit_cc)
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      |> Enum.filter(& &1)
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      |> Enum.reject(fn x -> String.ends_with?(x, "/followers") and x != follower_collection end)
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      |> Enum.uniq()
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    object
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    |> Map.put("to", explicit_to)
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    |> Map.put("cc", final_cc)
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  end
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  # if as:Public is addressed, then make sure the followers collection is also addressed
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  # so that the activities will be delivered to local users.
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  def fix_implicit_addressing(%{"to" => to, "cc" => cc} = object, followers_collection) do
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    recipients = to ++ cc
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    if followers_collection not in recipients do
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      cond do
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        Pleroma.Constants.as_public() in cc ->
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          to = to ++ [followers_collection]
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          Map.put(object, "to", to)
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        Pleroma.Constants.as_public() in to ->
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          cc = cc ++ [followers_collection]
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          Map.put(object, "cc", cc)
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        true ->
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          object
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      end
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    else
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      object
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    end
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  end
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  def fix_addressing(object) do
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    {:ok, %User{follower_address: follower_collection}} =
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      object
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      |> Containment.get_actor()
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      |> User.get_or_fetch_by_ap_id()
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    object
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    |> fix_addressing_list("to")
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    |> fix_addressing_list("cc")
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    |> fix_addressing_list("bto")
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    |> fix_addressing_list("bcc")
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    |> fix_explicit_addressing(follower_collection)
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    |> fix_implicit_addressing(follower_collection)
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  end
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  def fix_actor(%{"attributedTo" => actor} = object) do
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    actor = Containment.get_actor(%{"actor" => actor})
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    # TODO: Remove actor field for Objects
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    object
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    |> Map.put("actor", actor)
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    |> Map.put("attributedTo", actor)
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  end
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  def fix_in_reply_to(object, options \\ [])
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  def fix_in_reply_to(%{"inReplyTo" => in_reply_to} = object, options)
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      when not is_nil(in_reply_to) do
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    in_reply_to_id = prepare_in_reply_to(in_reply_to)
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    depth = (options[:depth] || 0) + 1
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    if Federator.allowed_thread_distance?(depth) do
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      with {:ok, replied_object} <- get_obj_helper(in_reply_to_id, options),
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           %Activity{} <- Activity.get_create_by_object_ap_id(replied_object.data["id"]) do
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        object
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        |> Map.put("inReplyTo", replied_object.data["id"])
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        |> Map.put("context", replied_object.data["context"] || object["conversation"])
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        |> Map.drop(["conversation", "inReplyToAtomUri"])
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      else
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        e ->
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          Logger.warn("Couldn't fetch #{inspect(in_reply_to_id)}, error: #{inspect(e)}")
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          object
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      end
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    else
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      object
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    end
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  end
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  def fix_in_reply_to(object, _options), do: object
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  defp prepare_in_reply_to(in_reply_to) do
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    cond do
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      is_bitstring(in_reply_to) ->
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        in_reply_to
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      is_map(in_reply_to) && is_bitstring(in_reply_to["id"]) ->
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        in_reply_to["id"]
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      is_list(in_reply_to) && is_bitstring(Enum.at(in_reply_to, 0)) ->
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        Enum.at(in_reply_to, 0)
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      true ->
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        ""
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    end
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  end
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  def fix_context(object) do
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    context = object["context"] || object["conversation"] || Utils.generate_context_id()
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    object
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    |> Map.put("context", context)
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    |> Map.drop(["conversation"])
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  end
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  def fix_attachments(%{"attachment" => attachment} = object) when is_list(attachment) do
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    attachments =
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      Enum.map(attachment, fn data ->
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        url =
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          cond do
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            is_list(data["url"]) -> List.first(data["url"])
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            is_map(data["url"]) -> data["url"]
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            true -> nil
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          end
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        media_type =
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          cond do
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            is_map(url) && MIME.extensions(url["mediaType"]) != [] ->
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              url["mediaType"]
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            is_bitstring(data["mediaType"]) && MIME.extensions(data["mediaType"]) != [] ->
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              data["mediaType"]
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            is_bitstring(data["mimeType"]) && MIME.extensions(data["mimeType"]) != [] ->
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              data["mimeType"]
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            true ->
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              nil
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          end
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        href =
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          cond do
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            is_map(url) && is_binary(url["href"]) -> url["href"]
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            is_binary(data["url"]) -> data["url"]
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            is_binary(data["href"]) -> data["href"]
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            true -> nil
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          end
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        if href do
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          attachment_url =
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            %{
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              "href" => href,
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              "type" => Map.get(url || %{}, "type", "Link")
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            }
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            |> Maps.put_if_present("mediaType", media_type)
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            |> Maps.put_if_present("width", (url || %{})["width"] || data["width"])
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            |> Maps.put_if_present("height", (url || %{})["height"] || data["height"])
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          %{
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            "url" => [attachment_url],
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            "type" => data["type"] || "Document"
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          }
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          |> Maps.put_if_present("mediaType", media_type)
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          |> Maps.put_if_present("name", data["name"])
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          |> Maps.put_if_present("blurhash", data["blurhash"])
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        else
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          nil
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        end
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      end)
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      |> Enum.filter(& &1)
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    Map.put(object, "attachment", attachments)
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  end
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  def fix_attachments(%{"attachment" => attachment} = object) when is_map(attachment) do
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    object
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    |> Map.put("attachment", [attachment])
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    |> fix_attachments()
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  end
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  def fix_attachments(object), do: object
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  def fix_url(%{"url" => url} = object) when is_map(url) do
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    Map.put(object, "url", url["href"])
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  end
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  def fix_url(%{"url" => url} = object) when is_list(url) do
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    first_element = Enum.at(url, 0)
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    url_string =
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      cond do
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        is_bitstring(first_element) -> first_element
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        is_map(first_element) -> first_element["href"] || ""
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        true -> ""
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      end
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    Map.put(object, "url", url_string)
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  end
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  def fix_url(object), do: object
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  def fix_emoji(%{"tag" => tags} = object) when is_list(tags) do
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    emoji =
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      tags
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      |> Enum.filter(fn data -> is_map(data) and data["type"] == "Emoji" and data["icon"] end)
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      |> Enum.reduce(%{}, fn data, mapping ->
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        name = String.trim(data["name"], ":")
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        Map.put(mapping, name, data["icon"]["url"])
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      end)
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    Map.put(object, "emoji", emoji)
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  end
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  def fix_emoji(%{"tag" => %{"type" => "Emoji"} = tag} = object) do
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    name = String.trim(tag["name"], ":")
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    emoji = %{name => tag["icon"]["url"]}
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    Map.put(object, "emoji", emoji)
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  end
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  def fix_emoji(object), do: object
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  def fix_tag(%{"tag" => tag} = object) when is_list(tag) do
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    tags =
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      tag
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      |> Enum.filter(fn data -> data["type"] == "Hashtag" and data["name"] end)
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      |> Enum.map(fn
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        %{"name" => "#" <> hashtag} -> String.downcase(hashtag)
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        %{"name" => hashtag} -> String.downcase(hashtag)
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      end)
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    Map.put(object, "tag", tag ++ tags)
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  end
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  def fix_tag(%{"tag" => %{} = tag} = object) do
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    object
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    |> Map.put("tag", [tag])
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    |> fix_tag
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  end
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  def fix_tag(object), do: object
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  # content map usually only has one language so this will do for now.
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  def fix_content_map(%{"contentMap" => content_map} = object) do
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    content_groups = Map.to_list(content_map)
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    {_, content} = Enum.at(content_groups, 0)
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    Map.put(object, "content", content)
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  end
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  def fix_content_map(object), do: object
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  defp fix_type(%{"type" => "Note", "inReplyTo" => reply_id, "name" => _} = object, options)
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       when is_binary(reply_id) do
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    options = Keyword.put(options, :fetch, true)
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    with %Object{data: %{"type" => "Question"}} <- Object.normalize(reply_id, options) do
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      Map.put(object, "type", "Answer")
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    else
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      _ -> object
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    end
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  end
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  defp fix_type(object, _options), do: object
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  # Reduce the object list to find the reported user.
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  defp get_reported(objects) do
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    Enum.reduce_while(objects, nil, fn ap_id, _ ->
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      with %User{} = user <- User.get_cached_by_ap_id(ap_id) do
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        {:halt, user}
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      else
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        _ -> {:cont, nil}
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      end
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    end)
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  end
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  def handle_incoming(data, options \\ [])
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  # Flag objects are placed ahead of the ID check because Mastodon 2.8 and earlier send them
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  # with nil ID.
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  def handle_incoming(%{"type" => "Flag", "object" => objects, "actor" => actor} = data, _options) do
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    with context <- data["context"] || Utils.generate_context_id(),
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         content <- data["content"] || "",
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         %User{} = actor <- User.get_cached_by_ap_id(actor),
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         # Reduce the object list to find the reported user.
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         %User{} = account <- get_reported(objects),
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         # Remove the reported user from the object list.
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         statuses <- Enum.filter(objects, fn ap_id -> ap_id != account.ap_id end) do
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      %{
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        actor: actor,
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        context: context,
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        account: account,
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        statuses: statuses,
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        content: content,
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        additional: %{"cc" => [account.ap_id]}
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      }
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      |> ActivityPub.flag()
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    end
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  end
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  # disallow objects with bogus IDs
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  def handle_incoming(%{"id" => nil}, _options), do: :error
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  def handle_incoming(%{"id" => ""}, _options), do: :error
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  # length of https:// = 8, should validate better, but good enough for now.
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  def handle_incoming(%{"id" => id}, _options) when is_binary(id) and byte_size(id) < 8,
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    do: :error
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  def handle_incoming(
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        %{"type" => "Listen", "object" => %{"type" => "Audio"} = object} = data,
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        options
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      ) do
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    actor = Containment.get_actor(data)
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    data =
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      Map.put(data, "actor", actor)
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      |> fix_addressing
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 | 
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    with {:ok, %User{} = user} <- User.get_or_fetch_by_ap_id(data["actor"]) do
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      reply_depth = (options[:depth] || 0) + 1
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      options = Keyword.put(options, :depth, reply_depth)
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      object = fix_object(object, options)
 | 
						|
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      params = %{
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        to: data["to"],
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        object: object,
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						|
        actor: user,
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						|
        context: nil,
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						|
        local: false,
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        published: data["published"],
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        additional: Map.take(data, ["cc", "id"])
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      }
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      ActivityPub.listen(params)
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    else
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      _e -> :error
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    end
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  end
 | 
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  @doc "Rewrite misskey likes into EmojiReacts"
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  def handle_incoming(
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        %{
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          "type" => "Like",
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						|
          "_misskey_reaction" => reaction,
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						|
          "tag" => _
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        } = data,
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						|
        options
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						|
      ) do
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    data
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    |> Map.put("type", "EmojiReact")
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    |> Map.put("content", reaction)
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    |> handle_incoming(options)
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  end
 | 
						|
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						|
  def handle_incoming(
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        %{
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          "type" => "Like",
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						|
          "_misskey_reaction" => reaction
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						|
        } = data,
 | 
						|
        options
 | 
						|
      ) do
 | 
						|
    data
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						|
    |> Map.put("type", "EmojiReact")
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						|
    |> Map.put("content", reaction)
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    |> handle_incoming(options)
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  end
 | 
						|
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  def handle_incoming(
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        %{"type" => "Create", "object" => %{"type" => objtype, "id" => obj_id}} = data,
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						|
        options
 | 
						|
      )
 | 
						|
      when objtype in ~w{Question Answer ChatMessage Audio Video Event Article Note Page} 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, options) do
 | 
						|
      {:ok, activity}
 | 
						|
    else
 | 
						|
      %Activity{} = activity -> {:ok, activity}
 | 
						|
      e -> e
 | 
						|
    end
 | 
						|
  end
 | 
						|
 | 
						|
  def handle_incoming(%{"type" => type} = data, _options)
 | 
						|
      when type in ~w{Like EmojiReact Announce Add Remove} do
 | 
						|
    with :ok <- ObjectValidator.fetch_actor_and_object(data),
 | 
						|
         {:ok, activity, _meta} <- Pipeline.common_pipeline(data, local: false) do
 | 
						|
      {:ok, activity}
 | 
						|
    else
 | 
						|
      e ->
 | 
						|
        {:error, e}
 | 
						|
    end
 | 
						|
  end
 | 
						|
 | 
						|
  def handle_incoming(
 | 
						|
        %{"type" => type} = data,
 | 
						|
        _options
 | 
						|
      )
 | 
						|
      when type in ~w{Update Block Follow Accept Reject} do
 | 
						|
    with {:ok, %User{}} <- ObjectValidator.fetch_actor(data),
 | 
						|
         {:ok, activity, _} <-
 | 
						|
           Pipeline.common_pipeline(data, local: false) do
 | 
						|
      {:ok, activity}
 | 
						|
    end
 | 
						|
  end
 | 
						|
 | 
						|
  def handle_incoming(
 | 
						|
        %{"type" => "Delete"} = data,
 | 
						|
        _options
 | 
						|
      ) do
 | 
						|
    with {:ok, activity, _} <-
 | 
						|
           Pipeline.common_pipeline(data, local: false) do
 | 
						|
      {:ok, activity}
 | 
						|
    else
 | 
						|
      {:error, {:validate, _}} = e ->
 | 
						|
        # Check if we have a create activity for this
 | 
						|
        with {:ok, object_id} <- ObjectValidators.ObjectID.cast(data["object"]),
 | 
						|
             %Activity{data: %{"actor" => actor}} <-
 | 
						|
               Activity.create_by_object_ap_id(object_id) |> Repo.one(),
 | 
						|
             # We have one, insert a tombstone and retry
 | 
						|
             {:ok, tombstone_data, _} <- Builder.tombstone(actor, object_id),
 | 
						|
             {:ok, _tombstone} <- Object.create(tombstone_data) do
 | 
						|
          handle_incoming(data)
 | 
						|
        else
 | 
						|
          _ -> e
 | 
						|
        end
 | 
						|
    end
 | 
						|
  end
 | 
						|
 | 
						|
  def handle_incoming(
 | 
						|
        %{
 | 
						|
          "type" => "Undo",
 | 
						|
          "object" => %{"type" => "Follow", "object" => followed},
 | 
						|
          "actor" => follower,
 | 
						|
          "id" => id
 | 
						|
        } = _data,
 | 
						|
        _options
 | 
						|
      ) do
 | 
						|
    with %User{local: true} = followed <- User.get_cached_by_ap_id(followed),
 | 
						|
         {:ok, %User{} = follower} <- User.get_or_fetch_by_ap_id(follower),
 | 
						|
         {:ok, activity} <- ActivityPub.unfollow(follower, followed, id, false) do
 | 
						|
      User.unfollow(follower, followed)
 | 
						|
      {:ok, activity}
 | 
						|
    else
 | 
						|
      _e -> :error
 | 
						|
    end
 | 
						|
  end
 | 
						|
 | 
						|
  def handle_incoming(
 | 
						|
        %{
 | 
						|
          "type" => "Undo",
 | 
						|
          "object" => %{"type" => type}
 | 
						|
        } = data,
 | 
						|
        _options
 | 
						|
      )
 | 
						|
      when type in ["Like", "EmojiReact", "Announce", "Block"] do
 | 
						|
    with {:ok, activity, _} <- Pipeline.common_pipeline(data, local: false) do
 | 
						|
      {:ok, activity}
 | 
						|
    end
 | 
						|
  end
 | 
						|
 | 
						|
  # For Undos that don't have the complete object attached, try to find it in our database.
 | 
						|
  def handle_incoming(
 | 
						|
        %{
 | 
						|
          "type" => "Undo",
 | 
						|
          "object" => object
 | 
						|
        } = activity,
 | 
						|
        options
 | 
						|
      )
 | 
						|
      when is_binary(object) do
 | 
						|
    with %Activity{data: data} <- Activity.get_by_ap_id(object) do
 | 
						|
      activity
 | 
						|
      |> Map.put("object", data)
 | 
						|
      |> handle_incoming(options)
 | 
						|
    else
 | 
						|
      _e -> :error
 | 
						|
    end
 | 
						|
  end
 | 
						|
 | 
						|
  def handle_incoming(
 | 
						|
        %{
 | 
						|
          "type" => "Move",
 | 
						|
          "actor" => origin_actor,
 | 
						|
          "object" => origin_actor,
 | 
						|
          "target" => target_actor
 | 
						|
        },
 | 
						|
        _options
 | 
						|
      ) do
 | 
						|
    with %User{} = origin_user <- User.get_cached_by_ap_id(origin_actor),
 | 
						|
         {:ok, %User{} = target_user} <- User.get_or_fetch_by_ap_id(target_actor),
 | 
						|
         true <- origin_actor in target_user.also_known_as do
 | 
						|
      ActivityPub.move(origin_user, target_user, false)
 | 
						|
    else
 | 
						|
      _e -> :error
 | 
						|
    end
 | 
						|
  end
 | 
						|
 | 
						|
  def handle_incoming(_, _), do: :error
 | 
						|
 | 
						|
  @spec get_obj_helper(String.t(), Keyword.t()) :: {:ok, Object.t()} | nil
 | 
						|
  def get_obj_helper(id, options \\ []) do
 | 
						|
    options = Keyword.put(options, :fetch, true)
 | 
						|
 | 
						|
    case Object.normalize(id, options) do
 | 
						|
      %Object{} = object -> {:ok, object}
 | 
						|
      _ -> nil
 | 
						|
    end
 | 
						|
  end
 | 
						|
 | 
						|
  @spec get_embedded_obj_helper(String.t() | Object.t(), User.t()) :: {:ok, Object.t()} | nil
 | 
						|
  def get_embedded_obj_helper(%{"attributedTo" => attributed_to, "id" => object_id} = data, %User{
 | 
						|
        ap_id: ap_id
 | 
						|
      })
 | 
						|
      when attributed_to == ap_id do
 | 
						|
    with {:ok, activity} <-
 | 
						|
           handle_incoming(%{
 | 
						|
             "type" => "Create",
 | 
						|
             "to" => data["to"],
 | 
						|
             "cc" => data["cc"],
 | 
						|
             "actor" => attributed_to,
 | 
						|
             "object" => data
 | 
						|
           }) do
 | 
						|
      {:ok, Object.normalize(activity, fetch: false)}
 | 
						|
    else
 | 
						|
      _ -> get_obj_helper(object_id)
 | 
						|
    end
 | 
						|
  end
 | 
						|
 | 
						|
  def get_embedded_obj_helper(object_id, _) do
 | 
						|
    get_obj_helper(object_id)
 | 
						|
  end
 | 
						|
 | 
						|
  def set_reply_to_uri(%{"inReplyTo" => in_reply_to} = object) when is_binary(in_reply_to) do
 | 
						|
    with false <- String.starts_with?(in_reply_to, "http"),
 | 
						|
         {:ok, %{data: replied_to_object}} <- get_obj_helper(in_reply_to) do
 | 
						|
      Map.put(object, "inReplyTo", replied_to_object["external_url"] || in_reply_to)
 | 
						|
    else
 | 
						|
      _e -> object
 | 
						|
    end
 | 
						|
  end
 | 
						|
 | 
						|
  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
 | 
						|
    |> add_hashtags
 | 
						|
    |> add_mention_tags
 | 
						|
    |> add_emoji_tags
 | 
						|
    |> add_attributed_to
 | 
						|
    |> prepare_attachments
 | 
						|
    |> set_conversation
 | 
						|
    |> set_reply_to_uri
 | 
						|
    |> set_replies
 | 
						|
    |> strip_internal_fields
 | 
						|
    |> strip_internal_tags
 | 
						|
    |> set_type
 | 
						|
  end
 | 
						|
 | 
						|
  #  @doc
 | 
						|
  #  """
 | 
						|
  #  internal -> Mastodon
 | 
						|
  #  """
 | 
						|
 | 
						|
  def prepare_outgoing(%{"type" => activity_type, "object" => object_id} = data)
 | 
						|
      when activity_type in ["Create", "Listen"] do
 | 
						|
    object =
 | 
						|
      object_id
 | 
						|
      |> Object.normalize(fetch: false)
 | 
						|
      |> Map.get(:data)
 | 
						|
      |> prepare_object
 | 
						|
 | 
						|
    data =
 | 
						|
      data
 | 
						|
      |> Map.put("object", object)
 | 
						|
      |> Map.merge(Utils.make_json_ld_header())
 | 
						|
      |> Map.delete("bcc")
 | 
						|
 | 
						|
    {:ok, data}
 | 
						|
  end
 | 
						|
 | 
						|
  def prepare_outgoing(%{"type" => "Announce", "actor" => ap_id, "object" => object_id} = data) do
 | 
						|
    object =
 | 
						|
      object_id
 | 
						|
      |> Object.normalize(fetch: false)
 | 
						|
 | 
						|
    data =
 | 
						|
      if Visibility.is_private?(object) && object.data["actor"] == ap_id do
 | 
						|
        data |> Map.put("object", object |> Map.get(:data) |> prepare_object)
 | 
						|
      else
 | 
						|
        data |> maybe_fix_object_url
 | 
						|
      end
 | 
						|
 | 
						|
    data =
 | 
						|
      data
 | 
						|
      |> strip_internal_fields
 | 
						|
      |> Map.merge(Utils.make_json_ld_header())
 | 
						|
      |> Map.delete("bcc")
 | 
						|
 | 
						|
    {:ok, data}
 | 
						|
  end
 | 
						|
 | 
						|
  # Mastodon Accept/Reject requires a non-normalized object containing the actor URIs,
 | 
						|
  # because of course it does.
 | 
						|
  def prepare_outgoing(%{"type" => "Accept"} = data) do
 | 
						|
    with follow_activity <- Activity.normalize(data["object"]) do
 | 
						|
      object = %{
 | 
						|
        "actor" => follow_activity.actor,
 | 
						|
        "object" => follow_activity.data["object"],
 | 
						|
        "id" => follow_activity.data["id"],
 | 
						|
        "type" => "Follow"
 | 
						|
      }
 | 
						|
 | 
						|
      data =
 | 
						|
        data
 | 
						|
        |> Map.put("object", object)
 | 
						|
        |> Map.merge(Utils.make_json_ld_header())
 | 
						|
 | 
						|
      {:ok, data}
 | 
						|
    end
 | 
						|
  end
 | 
						|
 | 
						|
  def prepare_outgoing(%{"type" => "Reject"} = data) do
 | 
						|
    with follow_activity <- Activity.normalize(data["object"]) do
 | 
						|
      object = %{
 | 
						|
        "actor" => follow_activity.actor,
 | 
						|
        "object" => follow_activity.data["object"],
 | 
						|
        "id" => follow_activity.data["id"],
 | 
						|
        "type" => "Follow"
 | 
						|
      }
 | 
						|
 | 
						|
      data =
 | 
						|
        data
 | 
						|
        |> Map.put("object", object)
 | 
						|
        |> Map.merge(Utils.make_json_ld_header())
 | 
						|
 | 
						|
      {:ok, data}
 | 
						|
    end
 | 
						|
  end
 | 
						|
 | 
						|
  def prepare_outgoing(%{"type" => _type} = data) do
 | 
						|
    data =
 | 
						|
      data
 | 
						|
      |> strip_internal_fields
 | 
						|
      |> maybe_fix_object_url
 | 
						|
      |> Map.merge(Utils.make_json_ld_header())
 | 
						|
 | 
						|
    {:ok, data}
 | 
						|
  end
 | 
						|
 | 
						|
  def maybe_fix_object_url(%{"object" => object} = data) when is_binary(object) do
 | 
						|
    with false <- String.starts_with?(object, "http"),
 | 
						|
         {:fetch, {:ok, relative_object}} <- {:fetch, get_obj_helper(object)},
 | 
						|
         %{data: %{"external_url" => external_url}} when not is_nil(external_url) <-
 | 
						|
           relative_object do
 | 
						|
      Map.put(data, "object", external_url)
 | 
						|
    else
 | 
						|
      {:fetch, e} ->
 | 
						|
        Logger.error("Couldn't fetch #{object} #{inspect(e)}")
 | 
						|
        data
 | 
						|
 | 
						|
      _ ->
 | 
						|
        data
 | 
						|
    end
 | 
						|
  end
 | 
						|
 | 
						|
  def maybe_fix_object_url(data), do: data
 | 
						|
 | 
						|
  def add_hashtags(object) do
 | 
						|
    tags =
 | 
						|
      (object["tag"] || [])
 | 
						|
      |> Enum.map(fn
 | 
						|
        # Expand internal representation tags into AS2 tags.
 | 
						|
        tag when is_binary(tag) ->
 | 
						|
          %{
 | 
						|
            "href" => Pleroma.Web.Endpoint.url() <> "/tags/#{tag}",
 | 
						|
            "name" => "##{tag}",
 | 
						|
            "type" => "Hashtag"
 | 
						|
          }
 | 
						|
 | 
						|
        # Do not process tags which are already AS2 tag objects.
 | 
						|
        tag when is_map(tag) ->
 | 
						|
          tag
 | 
						|
      end)
 | 
						|
 | 
						|
    Map.put(object, "tag", tags)
 | 
						|
  end
 | 
						|
 | 
						|
  # TODO These should be added on our side on insertion, it doesn't make much
 | 
						|
  # sense to regenerate these all the time
 | 
						|
  def add_mention_tags(object) do
 | 
						|
    to = object["to"] || []
 | 
						|
    cc = object["cc"] || []
 | 
						|
    mentioned = User.get_users_from_set(to ++ cc, local_only: false)
 | 
						|
 | 
						|
    mentions = Enum.map(mentioned, &build_mention_tag/1)
 | 
						|
 | 
						|
    tags = object["tag"] || []
 | 
						|
    Map.put(object, "tag", tags ++ mentions)
 | 
						|
  end
 | 
						|
 | 
						|
  defp build_mention_tag(%{ap_id: ap_id, nickname: nickname} = _) do
 | 
						|
    %{"type" => "Mention", "href" => ap_id, "name" => "@#{nickname}"}
 | 
						|
  end
 | 
						|
 | 
						|
  def take_emoji_tags(%User{emoji: emoji}) do
 | 
						|
    emoji
 | 
						|
    |> Map.to_list()
 | 
						|
    |> Enum.map(&build_emoji_tag/1)
 | 
						|
  end
 | 
						|
 | 
						|
  # TODO: we should probably send mtime instead of unix epoch time for updated
 | 
						|
  def add_emoji_tags(%{"emoji" => emoji} = object) do
 | 
						|
    tags = object["tag"] || []
 | 
						|
 | 
						|
    out = Enum.map(emoji, &build_emoji_tag/1)
 | 
						|
 | 
						|
    Map.put(object, "tag", tags ++ out)
 | 
						|
  end
 | 
						|
 | 
						|
  def add_emoji_tags(object), do: object
 | 
						|
 | 
						|
  defp build_emoji_tag({name, url}) do
 | 
						|
    %{
 | 
						|
      "icon" => %{"url" => "#{URI.encode(url)}", "type" => "Image"},
 | 
						|
      "name" => ":" <> name <> ":",
 | 
						|
      "type" => "Emoji",
 | 
						|
      "updated" => "1970-01-01T00:00:00Z",
 | 
						|
      "id" => url
 | 
						|
    }
 | 
						|
  end
 | 
						|
 | 
						|
  def set_conversation(object) do
 | 
						|
    Map.put(object, "conversation", object["context"])
 | 
						|
  end
 | 
						|
 | 
						|
  def set_type(%{"type" => "Answer"} = object) do
 | 
						|
    Map.put(object, "type", "Note")
 | 
						|
  end
 | 
						|
 | 
						|
  def set_type(object), do: object
 | 
						|
 | 
						|
  def add_attributed_to(object) do
 | 
						|
    attributed_to = object["attributedTo"] || object["actor"]
 | 
						|
    Map.put(object, "attributedTo", attributed_to)
 | 
						|
  end
 | 
						|
 | 
						|
  # TODO: Revisit this
 | 
						|
  def prepare_attachments(%{"type" => "ChatMessage"} = object), do: object
 | 
						|
 | 
						|
  def prepare_attachments(object) do
 | 
						|
    attachments =
 | 
						|
      object
 | 
						|
      |> Map.get("attachment", [])
 | 
						|
      |> Enum.map(fn data ->
 | 
						|
        [%{"mediaType" => media_type, "href" => href} = url | _] = data["url"]
 | 
						|
 | 
						|
        %{
 | 
						|
          "url" => href,
 | 
						|
          "mediaType" => media_type,
 | 
						|
          "name" => data["name"],
 | 
						|
          "type" => "Document"
 | 
						|
        }
 | 
						|
        |> Maps.put_if_present("width", url["width"])
 | 
						|
        |> Maps.put_if_present("height", url["height"])
 | 
						|
        |> Maps.put_if_present("blurhash", data["blurhash"])
 | 
						|
      end)
 | 
						|
 | 
						|
    Map.put(object, "attachment", attachments)
 | 
						|
  end
 | 
						|
 | 
						|
  def strip_internal_fields(object) do
 | 
						|
    Map.drop(object, Pleroma.Constants.object_internal_fields())
 | 
						|
  end
 | 
						|
 | 
						|
  defp strip_internal_tags(%{"tag" => tags} = object) do
 | 
						|
    tags = Enum.filter(tags, fn x -> is_map(x) end)
 | 
						|
 | 
						|
    Map.put(object, "tag", tags)
 | 
						|
  end
 | 
						|
 | 
						|
  defp strip_internal_tags(object), do: object
 | 
						|
 | 
						|
  def perform(:user_upgrade, user) do
 | 
						|
    # we pass a fake user so that the followers collection is stripped away
 | 
						|
    old_follower_address = User.ap_followers(%User{nickname: user.nickname})
 | 
						|
 | 
						|
    from(
 | 
						|
      a in Activity,
 | 
						|
      where: ^old_follower_address in a.recipients,
 | 
						|
      update: [
 | 
						|
        set: [
 | 
						|
          recipients:
 | 
						|
            fragment(
 | 
						|
              "array_replace(?,?,?)",
 | 
						|
              a.recipients,
 | 
						|
              ^old_follower_address,
 | 
						|
              ^user.follower_address
 | 
						|
            )
 | 
						|
        ]
 | 
						|
      ]
 | 
						|
    )
 | 
						|
    |> Repo.update_all([])
 | 
						|
  end
 | 
						|
 | 
						|
  def upgrade_user_from_ap_id(ap_id) do
 | 
						|
    with %User{local: false} = user <- User.get_cached_by_ap_id(ap_id),
 | 
						|
         {:ok, data} <- ActivityPub.fetch_and_prepare_user_from_ap_id(ap_id),
 | 
						|
         {:ok, user} <- update_user(user, data) do
 | 
						|
      {:ok, _pid} = Task.start(fn -> ActivityPub.pinned_fetch_task(user) end)
 | 
						|
      TransmogrifierWorker.enqueue("user_upgrade", %{"user_id" => user.id})
 | 
						|
      {:ok, user}
 | 
						|
    else
 | 
						|
      %User{} = user -> {:ok, user}
 | 
						|
      e -> e
 | 
						|
    end
 | 
						|
  end
 | 
						|
 | 
						|
  defp update_user(user, data) do
 | 
						|
    user
 | 
						|
    |> User.remote_user_changeset(data)
 | 
						|
    |> User.update_and_set_cache()
 | 
						|
  end
 | 
						|
 | 
						|
  def maybe_fix_user_url(%{"url" => url} = data) when is_map(url) do
 | 
						|
    Map.put(data, "url", url["href"])
 | 
						|
  end
 | 
						|
 | 
						|
  def maybe_fix_user_url(data), do: data
 | 
						|
 | 
						|
  def maybe_fix_user_object(data), do: maybe_fix_user_url(data)
 | 
						|
end
 |