spc-pleroma/lib/pleroma/web/activity_pub/transmogrifier.ex

1247 lines
36 KiB
Elixir

# Pleroma: A lightweight social networking server
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.Transmogrifier do
@moduledoc """
A module to handle coding from internal to wire ActivityPub and back.
"""
alias Pleroma.Activity
alias Pleroma.FollowingRelationship
alias Pleroma.Object
alias Pleroma.Object.Containment
alias Pleroma.Repo
alias Pleroma.User
alias Pleroma.Web.ActivityPub.ActivityPub
alias Pleroma.Web.ActivityPub.Utils
alias Pleroma.Web.ActivityPub.Visibility
alias Pleroma.Web.Federator
alias Pleroma.Workers.TransmogrifierWorker
import Ecto.Query
require Logger
require Pleroma.Constants
@doc """
Modifies an incoming AP object (mastodon format) to our internal format.
"""
def fix_object(object, options \\ []) do
object
|> strip_internal_fields
|> fix_actor
|> fix_url
|> fix_attachments
|> fix_context
|> fix_in_reply_to(options)
|> fix_emoji
|> fix_tag
|> fix_content_map
|> fix_addressing
|> fix_summary
|> fix_type(options)
end
def fix_summary(%{"summary" => nil} = object) do
Map.put(object, "summary", "")
end
def fix_summary(%{"summary" => _} = object) do
# summary is present, nothing to do
object
end
def fix_summary(object), do: Map.put(object, "summary", "")
def fix_addressing_list(map, field) do
cond do
is_binary(map[field]) ->
Map.put(map, field, [map[field]])
is_nil(map[field]) ->
Map.put(map, field, [])
true ->
map
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)
explicit_cc = Enum.filter(to, fn x -> x not in explicit_mentions end)
final_cc =
(cc ++ explicit_cc)
|> Enum.reject(fn x -> String.ends_with?(x, "/followers") and x != follower_collection end)
|> Enum.uniq()
object
|> Map.put("to", explicit_to)
|> 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
recipients = to ++ cc
if followers_collection not in recipients do
cond do
Pleroma.Constants.as_public() in cc ->
to = to ++ [followers_collection]
Map.put(object, "to", to)
Pleroma.Constants.as_public() in to ->
cc = cc ++ [followers_collection]
Map.put(object, "cc", cc)
true ->
object
end
else
object
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)
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)
end
def fix_actor(%{"attributedTo" => actor} = object) do
Map.put(object, "actor", Containment.get_actor(%{"actor" => actor}))
end
def fix_in_reply_to(object, options \\ [])
def fix_in_reply_to(%{"inReplyTo" => in_reply_to} = object, options)
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_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
object
|> Map.put("inReplyTo", replied_object.data["id"])
|> Map.put("inReplyToAtomUri", object["inReplyToAtomUri"] || in_reply_to_id)
|> Map.put("conversation", replied_object.data["context"] || object["conversation"])
|> Map.put("context", replied_object.data["context"] || object["conversation"])
else
e ->
Logger.error("Couldn't fetch #{inspect(in_reply_to_id)}, error: #{inspect(e)}")
object
end
else
object
end
end
def fix_in_reply_to(object, _options), do: object
defp prepare_in_reply_to(in_reply_to) do
cond do
is_bitstring(in_reply_to) ->
in_reply_to
is_map(in_reply_to) && is_bitstring(in_reply_to["id"]) ->
in_reply_to["id"]
is_list(in_reply_to) && is_bitstring(Enum.at(in_reply_to, 0)) ->
Enum.at(in_reply_to, 0)
true ->
""
end
end
def fix_context(object) do
context = object["context"] || object["conversation"] || Utils.generate_context_id()
object
|> Map.put("context", context)
|> Map.put("conversation", context)
end
def fix_attachments(%{"attachment" => attachment} = object) when is_list(attachment) do
attachments =
Enum.map(attachment, fn data ->
media_type = data["mediaType"] || data["mimeType"]
href = data["url"] || data["href"]
url = [%{"type" => "Link", "mediaType" => media_type, "href" => href}]
data
|> Map.put("mediaType", media_type)
|> Map.put("url", url)
end)
Map.put(object, "attachment", attachments)
end
def fix_attachments(%{"attachment" => attachment} = object) when is_map(attachment) do
object
|> Map.put("attachment", [attachment])
|> fix_attachments()
end
def fix_attachments(object), do: object
def fix_url(%{"url" => url} = object) when is_map(url) do
Map.put(object, "url", url["href"])
end
def fix_url(%{"type" => object_type, "url" => url} = object)
when object_type in ["Video", "Audio"] and is_list(url) do
first_element = Enum.at(url, 0)
link_element = Enum.find(url, fn x -> is_map(x) and x["mimeType"] == "text/html" end)
object
|> Map.put("attachment", [first_element])
|> Map.put("url", link_element["href"])
end
def fix_url(%{"type" => object_type, "url" => url} = object)
when object_type != "Video" and is_list(url) do
first_element = Enum.at(url, 0)
url_string =
cond do
is_bitstring(first_element) -> first_element
is_map(first_element) -> first_element["href"] || ""
true -> ""
end
Map.put(object, "url", url_string)
end
def fix_url(object), do: object
def fix_emoji(%{"tag" => tags} = object) when is_list(tags) do
emoji =
tags
|> Enum.filter(fn data -> data["type"] == "Emoji" and data["icon"] end)
|> Enum.reduce(%{}, fn data, mapping ->
name = String.trim(data["name"], ":")
Map.put(mapping, name, data["icon"]["url"])
end)
# we merge mastodon and pleroma emoji into a single mapping, to allow for both wire formats
emoji = Map.merge(object["emoji"] || %{}, emoji)
Map.put(object, "emoji", emoji)
end
def fix_emoji(%{"tag" => %{"type" => "Emoji"} = tag} = object) do
name = String.trim(tag["name"], ":")
emoji = %{name => tag["icon"]["url"]}
Map.put(object, "emoji", emoji)
end
def fix_emoji(object), do: object
def fix_tag(%{"tag" => tag} = object) when is_list(tag) do
tags =
tag
|> Enum.filter(fn data -> data["type"] == "Hashtag" and data["name"] end)
|> Enum.map(fn data -> String.slice(data["name"], 1..-1) end)
Map.put(object, "tag", tag ++ tags)
end
def fix_tag(%{"tag" => %{"type" => "Hashtag", "name" => hashtag} = tag} = object) do
combined = [tag, String.slice(hashtag, 1..-1)]
Map.put(object, "tag", combined)
end
def fix_tag(%{"tag" => %{} = tag} = object), do: Map.put(object, "tag", [tag])
def fix_tag(object), do: object
# content map usually only has one language so this will do for now.
def fix_content_map(%{"contentMap" => content_map} = object) do
content_groups = Map.to_list(content_map)
{_, content} = Enum.at(content_groups, 0)
Map.put(object, "content", content)
end
def fix_content_map(object), do: object
def fix_type(object, options \\ [])
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
Map.put(object, "type", "Answer")
else
_ -> object
end
end
def fix_type(object, _), do: object
defp mastodon_follow_hack(%{"id" => id, "actor" => follower_id}, followed) do
with true <- id =~ "follows",
%User{local: true} = follower <- User.get_cached_by_ap_id(follower_id),
%Activity{} = activity <- Utils.fetch_latest_follow(follower, followed) do
{:ok, activity}
else
_ -> {:error, nil}
end
end
defp mastodon_follow_hack(_, _), do: {:error, nil}
defp get_follow_activity(follow_object, followed) do
with object_id when not is_nil(object_id) <- Utils.get_ap_id(follow_object),
{_, %Activity{} = activity} <- {:activity, Activity.get_by_ap_id(object_id)} do
{:ok, activity}
else
# Can't find the activity. This might a Mastodon 2.3 "Accept"
{:activity, nil} ->
mastodon_follow_hack(follow_object, followed)
_ ->
{:error, nil}
end
end
# Reduce the object list to find the reported user.
defp get_reported(objects) do
Enum.reduce_while(objects, nil, fn ap_id, _ ->
with %User{} = user <- User.get_cached_by_ap_id(ap_id) do
{:halt, user}
else
_ -> {:cont, nil}
end
end)
end
def handle_incoming(data, options \\ [])
# Flag objects are placed ahead of the ID check because Mastodon 2.8 and earlier send them
# with nil ID.
def handle_incoming(%{"type" => "Flag", "object" => objects, "actor" => actor} = data, _options) do
with context <- data["context"] || Utils.generate_context_id(),
content <- data["content"] || "",
%User{} = actor <- User.get_cached_by_ap_id(actor),
# Reduce the object list to find the reported user.
%User{} = account <- get_reported(objects),
# Remove the reported user from the object list.
statuses <- Enum.filter(objects, fn ap_id -> ap_id != account.ap_id end) do
%{
actor: actor,
context: context,
account: account,
statuses: statuses,
content: content,
additional: %{"cc" => [account.ap_id]}
}
|> ActivityPub.flag()
end
end
# disallow objects with bogus IDs
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 is_binary(id) and byte_size(id) < 8,
do: :error
# TODO: validate those with a Ecto scheme
# - tags
# - emoji
def handle_incoming(
%{"type" => "Create", "object" => %{"type" => objtype} = object} = data,
options
)
when objtype in ["Article", "Event", "Note", "Video", "Page", "Question", "Answer", "Audio"] do
actor = Containment.get_actor(data)
data =
Map.put(data, "actor", actor)
|> fix_addressing
with nil <- Activity.get_create_by_object_ap_id(object["id"]),
{:ok, %User{} = user} <- User.get_or_fetch_by_ap_id(data["actor"]) do
object = fix_object(object, options)
params = %{
to: data["to"],
object: object,
actor: user,
context: object["conversation"],
local: false,
published: data["published"],
additional:
Map.take(data, [
"cc",
"directMessage",
"id"
])
}
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
end
end
def handle_incoming(
%{"type" => "Listen", "object" => %{"type" => "Audio"} = object} = data,
options
) do
actor = Containment.get_actor(data)
data =
Map.put(data, "actor", actor)
|> fix_addressing
with {:ok, %User{} = user} <- User.get_or_fetch_by_ap_id(data["actor"]) do
reply_depth = (options[:depth] || 0) + 1
options = Keyword.put(options, :depth, reply_depth)
object = fix_object(object, options)
params = %{
to: data["to"],
object: object,
actor: user,
context: nil,
local: false,
published: data["published"],
additional: Map.take(data, ["cc", "id"])
}
ActivityPub.listen(params)
else
_e -> :error
end
end
def handle_incoming(
%{"type" => "Follow", "object" => followed, "actor" => follower, "id" => id} = data,
_options
) do
with %User{local: true} = followed <-
User.get_cached_by_ap_id(Containment.get_actor(%{"actor" => followed})),
{:ok, %User{} = follower} <-
User.get_or_fetch_by_ap_id(Containment.get_actor(%{"actor" => follower})),
{:ok, activity} <- ActivityPub.follow(follower, followed, id, false) do
with deny_follow_blocked <- Pleroma.Config.get([:user, :deny_follow_blocked]),
{_, false} <- {:user_blocked, User.blocks?(followed, follower) && deny_follow_blocked},
{_, false} <- {:user_locked, User.locked?(followed)},
{_, {:ok, follower}} <- {:follow, User.follow(follower, followed)},
{_, {:ok, _}} <-
{:follow_state_update, Utils.update_follow_state_for_all(activity, "accept")},
{:ok, _relationship} <- FollowingRelationship.update(follower, followed, "accept") do
ActivityPub.accept(%{
to: [follower.ap_id],
actor: followed,
object: data,
local: true
})
else
{:user_blocked, true} ->
{:ok, _} = Utils.update_follow_state_for_all(activity, "reject")
{:ok, _relationship} = FollowingRelationship.update(follower, followed, "reject")
ActivityPub.reject(%{
to: [follower.ap_id],
actor: followed,
object: data,
local: true
})
{:follow, {:error, _}} ->
{:ok, _} = Utils.update_follow_state_for_all(activity, "reject")
{:ok, _relationship} = FollowingRelationship.update(follower, followed, "reject")
ActivityPub.reject(%{
to: [follower.ap_id],
actor: followed,
object: data,
local: true
})
{:user_locked, true} ->
{:ok, _relationship} = FollowingRelationship.update(follower, followed, "pending")
:noop
end
{:ok, activity}
else
_e ->
:error
end
end
def handle_incoming(
%{"type" => "Accept", "object" => follow_object, "actor" => _actor, "id" => id} = data,
_options
) do
with actor <- Containment.get_actor(data),
{:ok, %User{} = followed} <- User.get_or_fetch_by_ap_id(actor),
{:ok, follow_activity} <- get_follow_activity(follow_object, followed),
{:ok, follow_activity} <- Utils.update_follow_state_for_all(follow_activity, "accept"),
%User{local: true} = follower <- User.get_cached_by_ap_id(follow_activity.data["actor"]),
{:ok, _relationship} <- FollowingRelationship.update(follower, followed, "accept") do
ActivityPub.accept(%{
to: follow_activity.data["to"],
type: "Accept",
actor: followed,
object: follow_activity.data["id"],
local: false,
activity_id: id
})
else
_e -> :error
end
end
def handle_incoming(
%{"type" => "Reject", "object" => follow_object, "actor" => _actor, "id" => id} = data,
_options
) do
with actor <- Containment.get_actor(data),
{:ok, %User{} = followed} <- User.get_or_fetch_by_ap_id(actor),
{:ok, follow_activity} <- get_follow_activity(follow_object, followed),
{:ok, follow_activity} <- Utils.update_follow_state_for_all(follow_activity, "reject"),
%User{local: true} = follower <- User.get_cached_by_ap_id(follow_activity.data["actor"]),
{:ok, _relationship} <- FollowingRelationship.update(follower, followed, "reject"),
{:ok, activity} <-
ActivityPub.reject(%{
to: follow_activity.data["to"],
type: "Reject",
actor: followed,
object: follow_activity.data["id"],
local: false,
activity_id: id
}) do
{:ok, activity}
else
_e -> :error
end
end
@misskey_reactions %{
"like" => "👍",
"love" => "❤️",
"laugh" => "😆",
"hmm" => "🤔",
"surprise" => "😮",
"congrats" => "🎉",
"angry" => "💢",
"confused" => "😥",
"rip" => "😇",
"pudding" => "🍮",
"star" => ""
}
@doc "Rewrite misskey likes into EmojiReacts"
def handle_incoming(
%{
"type" => "Like",
"_misskey_reaction" => reaction
} = data,
options
) do
data
|> Map.put("type", "EmojiReact")
|> Map.put("content", @misskey_reactions[reaction] || reaction)
|> handle_incoming(options)
end
def handle_incoming(
%{"type" => "Like", "object" => object_id, "actor" => _actor, "id" => id} = data,
_options
) do
with actor <- Containment.get_actor(data),
{:ok, %User{} = actor} <- User.get_or_fetch_by_ap_id(actor),
{:ok, object} <- get_obj_helper(object_id),
{:ok, activity, _object} <- ActivityPub.like(actor, object, id, false) do
{:ok, activity}
else
_e -> :error
end
end
def handle_incoming(
%{
"type" => "EmojiReact",
"object" => object_id,
"actor" => _actor,
"id" => id,
"content" => emoji
} = data,
_options
) do
with actor <- Containment.get_actor(data),
{:ok, %User{} = actor} <- User.get_or_fetch_by_ap_id(actor),
{:ok, object} <- get_obj_helper(object_id),
{:ok, activity, _object} <-
ActivityPub.react_with_emoji(actor, object, emoji, activity_id: id, local: false) do
{:ok, activity}
else
_e -> :error
end
end
def handle_incoming(
%{"type" => "Announce", "object" => object_id, "actor" => _actor, "id" => id} = data,
_options
) do
with actor <- Containment.get_actor(data),
{:ok, %User{} = actor} <- User.get_or_fetch_by_ap_id(actor),
{:ok, object} <- get_embedded_obj_helper(object_id, actor),
public <- Visibility.is_public?(data),
{:ok, activity, _object} <- ActivityPub.announce(actor, object, id, false, public) do
{:ok, activity}
else
_e -> :error
end
end
def handle_incoming(
%{"type" => "Update", "object" => %{"type" => object_type} = object, "actor" => actor_id} =
data,
_options
)
when object_type in [
"Person",
"Application",
"Service",
"Organization"
] 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)
actor
|> User.upgrade_changeset(new_user_data, true)
|> User.update_and_set_cache()
ActivityPub.update(%{
local: false,
to: data["to"] || [],
cc: data["cc"] || [],
object: object,
actor: actor_id,
activity_id: data["id"]
})
else
e ->
Logger.error(e)
:error
end
end
# TODO: We presently assume that any actor on the same origin domain as the object being
# deleted has the rights to delete that object. A better way to validate whether or not
# the object should be deleted is to refetch the object URI, which should return either
# an error or a tombstone. This would allow us to verify that a deletion actually took
# place.
def handle_incoming(
%{"type" => "Delete", "object" => object_id, "actor" => actor, "id" => id} = data,
_options
) do
object_id = Utils.get_ap_id(object_id)
with actor <- Containment.get_actor(data),
{:ok, %User{} = actor} <- User.get_or_fetch_by_ap_id(actor),
{:ok, object} <- get_obj_helper(object_id),
:ok <- Containment.contain_origin(actor.ap_id, object.data),
{:ok, activity} <-
ActivityPub.delete(object, local: false, activity_id: id, actor: actor.ap_id) do
{:ok, activity}
else
nil ->
case User.get_cached_by_ap_id(object_id) do
%User{ap_id: ^actor} = user ->
User.delete(user)
nil ->
:error
end
_e ->
:error
end
end
def handle_incoming(
%{
"type" => "Undo",
"object" => %{"type" => "Announce", "object" => object_id},
"actor" => _actor,
"id" => id
} = data,
_options
) do
with actor <- Containment.get_actor(data),
{:ok, %User{} = actor} <- User.get_or_fetch_by_ap_id(actor),
{:ok, object} <- get_obj_helper(object_id),
{:ok, activity, _} <- ActivityPub.unannounce(actor, object, id, false) do
{:ok, activity}
else
_e -> :error
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" => "EmojiReact", "id" => reaction_activity_id},
"actor" => _actor,
"id" => id
} = data,
_options
) do
with actor <- Containment.get_actor(data),
{:ok, %User{} = actor} <- User.get_or_fetch_by_ap_id(actor),
{:ok, activity, _} <-
ActivityPub.unreact_with_emoji(actor, reaction_activity_id,
activity_id: id,
local: false
) do
{:ok, activity}
else
_e -> :error
end
end
def handle_incoming(
%{
"type" => "Undo",
"object" => %{"type" => "Block", "object" => blocked},
"actor" => blocker,
"id" => id
} = _data,
_options
) do
with %User{local: true} = blocked <- User.get_cached_by_ap_id(blocked),
{:ok, %User{} = blocker} <- User.get_or_fetch_by_ap_id(blocker),
{:ok, activity} <- ActivityPub.unblock(blocker, blocked, id, false) do
User.unblock(blocker, blocked)
{:ok, activity}
else
_e -> :error
end
end
def handle_incoming(
%{"type" => "Block", "object" => blocked, "actor" => blocker, "id" => id} = _data,
_options
) do
with %User{local: true} = blocked = User.get_cached_by_ap_id(blocked),
{:ok, %User{} = blocker} = User.get_or_fetch_by_ap_id(blocker),
{:ok, activity} <- ActivityPub.block(blocker, blocked, id, false) do
User.unfollow(blocker, blocked)
User.block(blocker, blocked)
{:ok, activity}
else
_e -> :error
end
end
def handle_incoming(
%{
"type" => "Undo",
"object" => %{"type" => "Like", "object" => object_id},
"actor" => _actor,
"id" => id
} = data,
_options
) do
with actor <- Containment.get_actor(data),
{:ok, %User{} = actor} <- User.get_or_fetch_by_ap_id(actor),
{:ok, object} <- get_obj_helper(object_id),
{:ok, activity, _, _} <- ActivityPub.unlike(actor, object, id, false) do
{:ok, activity}
else
_e -> :error
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
case Object.normalize(id, true, 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)}
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
|> set_sensitive
|> 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()
|> 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()
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
def add_mention_tags(object) do
{enabled_receivers, disabled_receivers} = Utils.get_notified_from_object(object)
potential_receivers = enabled_receivers ++ disabled_receivers
mentions = Enum.map(potential_receivers, &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
|> Enum.flat_map(&Map.to_list/1)
|> 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" => 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_sensitive(object) do
tags = object["tag"] || []
Map.put(object, "sensitive", "nsfw" in tags)
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
def prepare_attachments(object) do
attachments =
(object["attachment"] || [])
|> Enum.map(fn data ->
[%{"mediaType" => media_type, "href" => href} | _] = data["url"]
%{"url" => href, "mediaType" => media_type, "name" => data["name"], "type" => "Document"}
end)
Map.put(object, "attachment", attachments)
end
def strip_internal_fields(object) do
object
|> Map.drop(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),
already_ap <- User.ap_enabled?(user),
{:ok, user} <- upgrade_user(user, data) do
if not already_ap do
TransmogrifierWorker.enqueue("user_upgrade", %{"user_id" => user.id})
end
{:ok, user}
else
%User{} = user -> {:ok, user}
e -> e
end
end
defp upgrade_user(user, data) do
user
|> User.upgrade_changeset(data, true)
|> 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