debianize-mobilizon/lib/service/activity_pub/audience.ex

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defmodule Mobilizon.Service.ActivityPub.Audience do
@moduledoc """
Tools for calculating content audience
"""
alias Mobilizon.Actors.Actor
@ap_public "https://www.w3.org/ns/activitystreams#Public"
@doc """
Determines the full audience based on mentions for a public audience
Audience is:
* `to` : the mentioned actors, the eventual actor we're replying to and the public
* `cc` : the actor's followers
"""
@spec get_to_and_cc(Actor.t(), list(), map(), String.t()) :: {list(), list()}
def get_to_and_cc(%Actor{} = actor, mentions, in_reply_to, :public) do
to = [@ap_public | mentions]
cc = [actor.followers_url]
if in_reply_to do
{Enum.uniq([in_reply_to.actor | to]), cc}
else
{to, cc}
end
end
@doc """
Determines the full audience based on mentions based on a unlisted audience
Audience is:
* `to` : the mentionned actors, actor's followers and the eventual actor we're replying to
* `cc` : public
"""
@spec get_to_and_cc(Actor.t(), list(), map(), String.t()) :: {list(), list()}
def get_to_and_cc(%Actor{} = actor, mentions, in_reply_to, :unlisted) do
to = [actor.followers_url | mentions]
cc = [@ap_public]
if in_reply_to do
{Enum.uniq([in_reply_to.actor | to]), cc}
else
{to, cc}
end
end
@doc """
Determines the full audience based on mentions based on a private audience
Audience is:
* `to` : the mentioned actors, actor's followers and the eventual actor we're replying to
* `cc` : none
"""
@spec get_to_and_cc(Actor.t(), list(), map(), String.t()) :: {list(), list()}
def get_to_and_cc(%Actor{} = actor, mentions, in_reply_to, :private) do
{to, cc} = get_to_and_cc(actor, mentions, in_reply_to, :direct)
{[actor.followers_url | to], cc}
end
@doc """
Determines the full audience based on mentions based on a direct audience
Audience is:
* `to` : the mentioned actors and the eventual actor we're replying to
* `cc` : none
"""
@spec get_to_and_cc(Actor.t(), list(), map(), String.t()) :: {list(), list()}
def get_to_and_cc(_actor, mentions, in_reply_to, :direct) do
if in_reply_to do
{Enum.uniq([in_reply_to.actor | mentions]), []}
else
{mentions, []}
end
end
def get_to_and_cc(_actor, mentions, _in_reply_to, {:list, _}) do
{mentions, []}
end
# def get_addressed_actors(_, to) when is_list(to) do
# Actors.get(to)
# end
def get_addressed_actors(mentioned_users, _), do: mentioned_users
def calculate_to_and_cc_from_mentions(
actor,
mentions \\ [],
in_reply_to \\ nil,
visibility \\ :public
) do
with mentioned_actors <- for({_, mentioned_actor} <- mentions, do: mentioned_actor.url),
addressed_actors <- get_addressed_actors(mentioned_actors, nil),
{to, cc} <- get_to_and_cc(actor, addressed_actors, in_reply_to, visibility) do
%{"to" => to, "cc" => cc}
end
end
end