akkoma/lib/pleroma/web/activity_pub/transmogrifier.ex
2018-02-17 14:20:53 +01:00

75 lines
1.9 KiB
Elixir

defmodule Pleroma.Web.ActivityPub.Transmogrifier do
@moduledoc """
A module to handle coding from internal to wire ActivityPub and back.
"""
alias Pleroma.User
alias Pleroma.Web.ActivityPub.ActivityPub
@doc """
Modifies an incoming AP object (mastodon format) to our internal format.
"""
def fix_object(object) do
object
|> Map.put("actor", object["attributedTo"])
end
# TODO: validate those with a Ecto scheme
# - tags
# - emoji
def handle_incoming(%{"type" => "Create", "object" => %{"type" => "Note"} = object} = data) do
with %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
_e -> :error
end
end
@doc
"""
internal -> Mastodon
"""
def prepare_outgoing(%{"type" => "Create", "object" => %{"type" => "Note"} = object} = data) do
object = object
|> add_mention_tags
|> add_attributed_to
data = data
|> Map.put("object", object)
|> Map.put("@context", "https://www.w3.org/ns/activitystreams")
{:ok, data}
end
def add_mention_tags(object) do
mentions = object["to"]
|> 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 add_attributed_to(object) do
attributedTo = object["attributedTo"] || object["actor"]
object
|> Map.put("attributedTo", attributedTo)
end
end