mobilizon/lib/mobilizon_web/controllers/activity_pub_controller.ex

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defmodule MobilizonWeb.ActivityPubController do
use MobilizonWeb, :controller
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alias Mobilizon.{Actors, Actors.Actor, Events}
alias Mobilizon.Events.{Event, Comment}
alias MobilizonWeb.ActivityPub.{ObjectView, ActorView}
alias Mobilizon.Service.ActivityPub
alias Mobilizon.Service.ActivityPub.Utils
alias Mobilizon.Service.Federator
require Logger
action_fallback(:errors)
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@activity_pub_headers [
"application/activity+json",
"application/activity+json, application/ld+json"
]
def actor(conn, %{"name" => name}) do
with %Actor{} = actor <- Actors.get_local_actor_by_name(name) do
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cond do
conn |> get_req_header("accept") |> is_ap_header() ->
conn |> render_ap_actor(actor)
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true ->
conn
|> put_resp_content_type("text/html")
|> send_file(200, "priv/static/index.html")
end
else
nil -> {:error, :not_found}
end
end
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defp is_ap_header(ap_headers) do
length(@activity_pub_headers -- ap_headers) < 2
end
defp render_ap_actor(conn, %Actor{} = actor) do
conn
|> put_resp_header("content-type", "application/activity+json")
|> json(ActorView.render("actor.json", %{actor: actor}))
end
def event(conn, %{"uuid" => uuid}) do
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with %Event{} = event <- Events.get_event_full_by_uuid(uuid),
true <- event.public do
conn
|> put_resp_header("content-type", "application/activity+json")
|> json(ObjectView.render("event.json", %{event: event |> Utils.make_event_data()}))
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else
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_ ->
{:error, :not_found}
end
end
def comment(conn, %{"uuid" => uuid}) do
with %Comment{} = comment <- Events.get_comment_full_from_uuid(uuid) do
# Comments are always public for now
# TODO : Make comments maybe restricted
# true <- comment.public do
conn
|> put_resp_header("content-type", "application/activity+json")
|> json(ObjectView.render("comment.json", %{comment: comment |> Utils.make_comment_data()}))
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else
_ ->
{:error, :not_found}
end
end
def following(conn, %{"name" => name, "page" => page}) do
with {page, ""} = Integer.parse(page),
%Actor{} = actor <- Actors.get_local_actor_by_name_with_everything(name) do
conn
|> put_resp_header("content-type", "application/activity+json")
|> json(ActorView.render("following.json", %{actor: actor, page: page}))
end
end
def following(conn, %{"name" => name}) do
with %Actor{} = actor <- Actors.get_local_actor_by_name_with_everything(name) do
conn
|> put_resp_header("content-type", "application/activity+json")
|> json(ActorView.render("following.json", %{actor: actor}))
end
end
def followers(conn, %{"name" => name, "page" => page}) do
with {page, ""} = Integer.parse(page),
%Actor{} = actor <- Actors.get_local_actor_by_name_with_everything(name) do
conn
|> put_resp_header("content-type", "application/activity+json")
|> json(ActorView.render("followers.json", %{actor: actor, page: page}))
end
end
def followers(conn, %{"name" => name}) do
with %Actor{} = actor <- Actors.get_local_actor_by_name_with_everything(name) do
conn
|> put_resp_header("content-type", "application/activity+json")
|> json(ActorView.render("followers.json", %{actor: actor}))
end
end
def outbox(conn, %{"name" => name, "page" => page}) do
with {page, ""} = Integer.parse(page),
%Actor{} = actor <- Actors.get_local_actor_by_name(name) do
conn
|> put_resp_header("content-type", "application/activity+json")
|> json(ActorView.render("outbox.json", %{actor: actor, page: page}))
end
end
def outbox(conn, %{"name" => username}) do
outbox(conn, %{"name" => username, "page" => "0"})
end
# TODO: Ensure that this inbox is a recipient of the message
def inbox(%{assigns: %{valid_signature: true}} = conn, params) do
Federator.enqueue(:incoming_ap_doc, params)
json(conn, "ok")
end
# only accept relayed Creates
def inbox(conn, %{"type" => "Create"} = params) do
Logger.info(
"Signature missing or not from author, relayed Create message, fetching object from source"
)
ActivityPub.fetch_object_from_url(params["object"]["id"])
json(conn, "ok")
end
def inbox(conn, params) do
headers = Enum.into(conn.req_headers, %{})
if String.contains?(headers["signature"], params["actor"]) do
Logger.error(
"Signature validation error for: #{params["actor"]}, make sure you are forwarding the HTTP Host header!"
)
Logger.error(inspect(conn.req_headers))
end
json(conn, "error")
end
def errors(conn, {:error, :not_found}) do
conn
|> put_status(404)
|> json("Not found")
end
def errors(conn, _e) do
conn
|> put_status(500)
|> json("Unknown Error")
end
end