397 lines
11 KiB
Elixir
397 lines
11 KiB
Elixir
defmodule Mobilizon.Service.ActivityPub.Transmogrifier do
|
|
@moduledoc """
|
|
A module to handle coding from internal to wire ActivityPub and back.
|
|
"""
|
|
alias Mobilizon.Actors.Actor
|
|
alias Mobilizon.Actors
|
|
alias Mobilizon.Events.{Event, Comment}
|
|
alias Mobilizon.Service.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_in_reply_to
|
|
|> fix_tag
|
|
end
|
|
|
|
def fix_in_reply_to(%{"inReplyTo" => in_reply_to} = object)
|
|
when not is_nil(in_reply_to) do
|
|
in_reply_to_id =
|
|
cond do
|
|
is_bitstring(in_reply_to) -> # If the inReplyTo is just an AP ID
|
|
in_reply_to
|
|
|
|
is_map(in_reply_to) && is_bitstring(in_reply_to["id"]) -> # If the inReplyTo is a object itself
|
|
in_reply_to["id"]
|
|
|
|
is_list(in_reply_to) && is_bitstring(Enum.at(in_reply_to, 0)) -> # If the inReplyTo is an array
|
|
Enum.at(in_reply_to, 0)
|
|
|
|
true ->
|
|
Logger.error("inReplyTo ID seem incorrect")
|
|
Logger.error(inspect(in_reply_to))
|
|
""
|
|
end
|
|
|
|
case fetch_obj_helper(in_reply_to_id) do
|
|
{:ok, replied_object} ->
|
|
object
|
|
|> Map.put("inReplyTo", replied_object.data["id"])
|
|
|
|
e ->
|
|
Logger.error("Couldn't fetch #{in_reply_to_id} #{inspect(e)}")
|
|
object
|
|
end
|
|
end
|
|
|
|
def fix_in_reply_to(object), do: object
|
|
|
|
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_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
|
|
Logger.info("Handle incoming to create notes")
|
|
|
|
with {:ok, %Actor{} = actor} <- Actors.get_or_fetch_by_url(data["actor"]) do
|
|
Logger.debug("found actor")
|
|
object = fix_object(data["object"])
|
|
|
|
params = %{
|
|
to: data["to"],
|
|
object: object,
|
|
actor: actor,
|
|
local: false,
|
|
published: data["published"],
|
|
additional:
|
|
Map.take(data, [
|
|
"cc",
|
|
"id"
|
|
])
|
|
}
|
|
|
|
ActivityPub.create(params)
|
|
end
|
|
end
|
|
|
|
def handle_incoming(
|
|
%{"type" => "Follow", "object" => followed, "actor" => follower, "id" => id} = data
|
|
) do
|
|
with {:ok, %Actor{} = followed} <- Actors.get_or_fetch_by_url(followed, true),
|
|
{:ok, %Actor{} = follower} <- Actors.get_or_fetch_by_url(follower),
|
|
{:ok, activity} <- ActivityPub.follow(follower, followed, id, false) do
|
|
ActivityPub.accept(%{to: [follower.url], actor: followed.url, object: data, local: true})
|
|
|
|
{:ok, activity}
|
|
else
|
|
e ->
|
|
Logger.error("Unable to handle Follow activity")
|
|
Logger.error(inspect(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 {:ok, %Actor{} = actor} <- Actors.get_or_fetch_by_url(actor),
|
|
{:ok, object} <-
|
|
get_obj_helper(object_id) || ActivityPub.fetch_event_from_url(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" => in_reply_to} = object) 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
|
|
#
|
|
# # 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_reply_to_uri
|
|
end
|
|
|
|
@doc
|
|
"""
|
|
internal -> Mastodon
|
|
"""
|
|
|
|
def prepare_outgoing(%{"type" => "Create", "object" => %{"type" => "Note"} = object} = data) do
|
|
Logger.debug("Prepare outgoing for a note creation")
|
|
|
|
object =
|
|
object
|
|
|> prepare_object
|
|
|
|
data =
|
|
data
|
|
|> Map.put("object", object)
|
|
|> Map.put("@context", "https://www.w3.org/ns/activitystreams")
|
|
|
|
Logger.debug("Finished prepare outgoing for a note creation")
|
|
|
|
{: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 prepare_outgoing(%Event{} = event) do
|
|
event =
|
|
event
|
|
|> Map.from_struct()
|
|
|> Map.drop([:__meta__])
|
|
|> Map.put(:"@context", "https://www.w3.org/ns/activitystreams")
|
|
|> prepare_object
|
|
|
|
{:ok, event}
|
|
end
|
|
|
|
def prepare_outgoing(%Comment{} = comment) do
|
|
comment =
|
|
comment
|
|
|> Map.from_struct()
|
|
|> Map.drop([:__meta__])
|
|
|> Map.put(:"@context", "https://www.w3.org/ns/activitystreams")
|
|
|> prepare_object
|
|
|
|
{:ok, comment}
|
|
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" => MobilizonWeb.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 url -> Actors.get_actor_by_url!(url) end)
|
|
|> Enum.filter(& &1)
|
|
|> Enum.map(fn actor ->
|
|
%{"type" => "Mention", "href" => actor.url, "name" => "@#{actor.preferred_username}"}
|
|
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_sensitive(object) do
|
|
# tags = object["tag"] || []
|
|
# Map.put(object, "sensitive", "nsfw" in tags)
|
|
# end
|
|
#
|
|
def add_attributed_to(object) do
|
|
attributed_to = object["attributedTo"] || object["actor"]
|
|
|
|
object |> Map.put("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)
|
|
#
|
|
# object
|
|
# |> Map.put("attachment", attachments)
|
|
# end
|
|
|
|
def fetch_obj_helper(url) when is_bitstring(url), do: ActivityPub.fetch_object_from_url(url)
|
|
def fetch_obj_helper(obj) when is_map(obj), do: ActivityPub.fetch_object_from_url(obj["id"])
|
|
end
|