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diff --git a/lib/pleroma/web/activity_pub/transmogrifier.ex b/lib/pleroma/web/activity_pub/transmogrifier.ex
index da6562dcd..01b3eab27 100644
--- a/lib/pleroma/web/activity_pub/transmogrifier.ex
+++ b/lib/pleroma/web/activity_pub/transmogrifier.ex
@@ -1,477 +1,477 @@
defmodule Pleroma.Web.ActivityPub.Transmogrifier do
@moduledoc """
A module to handle coding from internal to wire ActivityPub and back.
"""
alias Pleroma.User
alias Pleroma.Object
alias Pleroma.Activity
alias Pleroma.Repo
alias Pleroma.Web.ActivityPub.ActivityPub
import Ecto.Query
require Logger
@doc """
Modifies an incoming AP object (mastodon format) to our internal format.
"""
def fix_object(object) do
object
|> Map.put("actor", object["attributedTo"])
|> fix_attachments
|> fix_context
|> fix_in_reply_to
|> fix_emoji
|> fix_tag
end
def fix_in_reply_to(%{"inReplyTo" => in_reply_to_id} = object)
when not is_nil(in_reply_to_id) do
case ActivityPub.fetch_object_from_id(in_reply_to_id) do
{:ok, replied_object} ->
activity = Activity.get_create_activity_by_object_ap_id(replied_object.data["id"])
object
|> Map.put("inReplyTo", replied_object.data["id"])
|> Map.put("inReplyToAtomUri", object["inReplyToAtomUri"] || in_reply_to_id)
|> Map.put("inReplyToStatusId", activity.id)
|> Map.put("conversation", replied_object.data["context"] || object["conversation"])
|> Map.put("context", replied_object.data["context"] || object["conversation"])
e ->
Logger.error("Couldn't fetch #{object["inReplyTo"]} #{inspect(e)}")
object
end
end
def fix_in_reply_to(object), do: object
def fix_context(object) do
object
|> Map.put("context", object["conversation"])
end
def fix_attachments(object) do
attachments =
(object["attachment"] || [])
|> Enum.map(fn data ->
url = [%{"type" => "Link", "mediaType" => data["mediaType"], "href" => data["url"]}]
Map.put(data, "url", url)
end)
object
|> Map.put("attachment", attachments)
end
def fix_emoji(object) do
tags = object["tag"] || []
emoji = tags |> Enum.filter(fn data -> data["type"] == "Emoji" and data["icon"] end)
emoji =
emoji
|> Enum.reduce(%{}, fn data, mapping ->
name = data["name"]
if String.starts_with?(name, ":") do
name = name |> String.slice(1..-2)
end
mapping |> Map.put(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)
object
|> Map.put("emoji", emoji)
end
def fix_tag(object) do
tags =
(object["tag"] || [])
|> Enum.filter(fn data -> data["type"] == "Hashtag" and data["name"] end)
|> Enum.map(fn data -> String.slice(data["name"], 1..-1) end)
combined = (object["tag"] || []) ++ tags
object
|> Map.put("tag", combined)
end
# TODO: validate those with a Ecto scheme
# - tags
# - emoji
def handle_incoming(%{"type" => "Create", "object" => %{"type" => "Note"} = object} = data) do
with nil <- Activity.get_create_activity_by_object_ap_id(object["id"]),
%User{} = user <- User.get_or_fetch_by_ap_id(data["actor"]) do
object = fix_object(data["object"])
params = %{
to: data["to"],
object: object,
actor: user,
context: object["conversation"],
local: false,
published: data["published"],
additional:
Map.take(data, [
"cc",
"id"
])
}
ActivityPub.create(params)
else
%Activity{} = activity -> {:ok, activity}
_e -> :error
end
end
def handle_incoming(
%{"type" => "Follow", "object" => followed, "actor" => follower, "id" => id} = data
) do
with %User{local: true} = followed <- User.get_cached_by_ap_id(followed),
%User{} = follower <- User.get_or_fetch_by_ap_id(follower),
{:ok, activity} <- ActivityPub.follow(follower, followed, id, false) do
ActivityPub.accept(%{to: [follower.ap_id], actor: followed.ap_id, object: data, local: true})
User.follow(follower, followed)
{:ok, activity}
else
_e -> :error
end
end
def handle_incoming(
%{"type" => "Like", "object" => object_id, "actor" => actor, "id" => id} = _data
) do
with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
{:ok, object} <-
get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
{:ok, activity, _object} <- ActivityPub.like(actor, object, id, false) do
{:ok, activity}
else
_e -> :error
end
end
def handle_incoming(
%{"type" => "Announce", "object" => object_id, "actor" => actor, "id" => id} = _data
) do
with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
{:ok, object} <-
get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
{:ok, activity, _object} <- ActivityPub.announce(actor, object, id, false) do
{:ok, activity}
else
_e -> :error
end
end
def handle_incoming(
%{"type" => "Update", "object" => %{"type" => "Person"} = object, "actor" => actor_id} =
data
) do
with %User{ap_id: ^actor_id} = actor <- User.get_by_ap_id(object["id"]) do
{:ok, new_user_data} = ActivityPub.user_data_from_user_object(object)
banner = new_user_data[:info]["banner"]
update_data =
new_user_data
|> Map.take([:name, :bio, :avatar])
|> Map.put(:info, Map.merge(actor.info, %{"banner" => banner}))
actor
|> User.upgrade_changeset(update_data)
|> User.update_and_set_cache()
ActivityPub.update(%{
local: false,
to: data["to"] || [],
cc: data["cc"] || [],
object: object,
actor: actor_id
})
else
e ->
Logger.error(e)
:error
end
end
# TODO: Make secure.
def handle_incoming(
%{"type" => "Delete", "object" => object_id, "actor" => actor, "id" => _id} = _data
) do
object_id =
case object_id do
%{"id" => id} -> id
id -> id
end
with %User{} = _actor <- User.get_or_fetch_by_ap_id(actor),
{:ok, object} <-
get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
{:ok, activity} <- ActivityPub.delete(object, false) do
{:ok, activity}
else
_e -> :error
end
end
# TODO
# Accept
# Undo
def handle_incoming(_), do: :error
def get_obj_helper(id) do
if object = Object.get_by_ap_id(id), do: {:ok, object}, else: nil
end
def set_reply_to_uri(%{"inReplyTo" => inReplyTo} = object) do
with false <- String.starts_with?(inReplyTo, "http"),
{:ok, %{data: replied_to_object}} <- get_obj_helper(inReplyTo) do
Map.put(object, "inReplyTo", replied_to_object["external_url"] || inReplyTo)
else
_e -> object
end
end
def set_reply_to_uri(obj), do: obj
# 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
end
@doc
- """
+ _ = """
internal -> Mastodon
"""
def prepare_outgoing(%{"type" => "Create", "object" => %{"type" => "Note"} = object} = data) do
object =
object
|> prepare_object
data =
data
|> Map.put("object", object)
|> Map.put("@context", "https://www.w3.org/ns/activitystreams")
{:ok, data}
end
def prepare_outgoing(%{"type" => _type} = data) do
data =
data
|> maybe_fix_object_url
|> Map.put("@context", "https://www.w3.org/ns/activitystreams")
{:ok, data}
end
def maybe_fix_object_url(data) do
if is_binary(data["object"]) and not String.starts_with?(data["object"], "http") do
case ActivityPub.fetch_object_from_id(data["object"]) do
{:ok, relative_object} ->
if relative_object.data["external_url"] do
_data =
data
|> Map.put("object", relative_object.data["external_url"])
else
data
end
e ->
Logger.error("Couldn't fetch #{data["object"]} #{inspect(e)}")
data
end
else
data
end
end
def add_hashtags(object) do
tags =
(object["tag"] || [])
|> Enum.map(fn tag ->
%{
"href" => Pleroma.Web.Endpoint.url() <> "/tags/#{tag}",
"name" => "##{tag}",
"type" => "Hashtag"
}
end)
object
|> Map.put("tag", tags)
end
def add_mention_tags(object) do
recipients = object["to"] ++ (object["cc"] || [])
mentions =
recipients
|> Enum.map(fn ap_id -> User.get_cached_by_ap_id(ap_id) end)
|> Enum.filter(& &1)
|> Enum.map(fn user ->
%{"type" => "Mention", "href" => user.ap_id, "name" => "@#{user.nickname}"}
end)
tags = object["tag"] || []
object
|> Map.put("tag", tags ++ mentions)
end
# TODO: we should probably send mtime instead of unix epoch time for updated
def add_emoji_tags(object) do
tags = object["tag"] || []
emoji = object["emoji"] || []
out =
emoji
|> Enum.map(fn {name, url} ->
%{
"icon" => %{"url" => url, "type" => "Image"},
"name" => ":" <> name <> ":",
"type" => "Emoji",
"updated" => "1970-01-01T00:00:00Z",
"id" => url
}
end)
object
|> Map.put("tag", tags ++ out)
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 add_attributed_to(object) do
attributedTo = object["attributedTo"] || object["actor"]
object
|> Map.put("attributedTo", attributedTo)
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)
object
|> Map.put("attachment", attachments)
end
defp user_upgrade_task(user) do
old_follower_address = User.ap_followers(user)
q =
from(
u in User,
where: ^old_follower_address in u.following,
update: [
set: [
following:
fragment(
"array_replace(?,?,?)",
u.following,
^old_follower_address,
^user.follower_address
)
]
]
)
Repo.update_all(q, [])
maybe_retire_websub(user.ap_id)
# Only do this for recent activties, don't go through the whole db.
# Only look at the last 1000 activities.
since = (Repo.aggregate(Activity, :max, :id) || 0) - 1_000
q =
from(
a in Activity,
where: ^old_follower_address in a.recipients,
where: a.id > ^since,
update: [
set: [
recipients:
fragment(
"array_replace(?,?,?)",
a.recipients,
^old_follower_address,
^user.follower_address
)
]
]
)
Repo.update_all(q, [])
end
def upgrade_user_from_ap_id(ap_id, async \\ true) do
with %User{local: false} = user <- User.get_by_ap_id(ap_id),
{:ok, data} <- ActivityPub.fetch_and_prepare_user_from_ap_id(ap_id) do
data =
data
|> Map.put(:info, Map.merge(user.info, data[:info]))
already_ap = User.ap_enabled?(user)
{:ok, user} =
User.upgrade_changeset(user, data)
|> Repo.update()
if !already_ap do
# This could potentially take a long time, do it in the background
if async do
Task.start(fn ->
user_upgrade_task(user)
end)
else
user_upgrade_task(user)
end
end
{:ok, user}
else
e -> e
end
end
def maybe_retire_websub(ap_id) do
# some sanity checks
if is_binary(ap_id) && String.length(ap_id) > 8 do
q =
from(
ws in Pleroma.Web.Websub.WebsubClientSubscription,
where: fragment("? like ?", ws.topic, ^"#{ap_id}%")
)
Repo.delete_all(q)
end
end
end

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