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diff --git a/lib/pleroma/web/activity_pub/transmogrifier.ex b/lib/pleroma/web/activity_pub/transmogrifier.ex
index 464842f69..6714319fb 100644
--- a/lib/pleroma/web/activity_pub/transmogrifier.ex
+++ b/lib/pleroma/web/activity_pub/transmogrifier.ex
@@ -1,257 +1,259 @@
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
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(object["inReplyToAtomUri"] || 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["conversation"])
+ |> Map.put("context", replied_object.data["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
# 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: data["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
# 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 prepare_object(object) do
object
|> set_sensitive
|> add_hashtags
|> add_mention_tags
|> add_attributed_to
|> prepare_attachments
|> set_conversation
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
|> Map.put("@context", "https://www.w3.org/ns/activitystreams")
{:ok, data}
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
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.
since = (Repo.aggregate(Activity, :max, :id) || 0) - 100_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]))
{:ok, user} = User.upgrade_changeset(user, data)
|> Repo.update()
# 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
{: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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