Rename MobilizonWeb to Mobilizon.Web

lib/web/controllers/activity_pub_controller.ex

@@ -0,0 +1,140 @@
+# Portions of this file are derived from Pleroma:
+# Copyright © 2017-2018 Pleroma Authors <https://pleroma.social>
+# SPDX-License-Identifier: AGPL-3.0-only
+# Upstream: https://git.pleroma.social/pleroma/pleroma/blob/develop/lib/pleroma/web/activity_pub/activity_pub_controller.ex
+
+defmodule Mobilizon.Web.ActivityPubController do
+  use Mobilizon.Web, :controller
+
+  alias Mobilizon.{Actors, Config}
+  alias Mobilizon.Actors.Actor
+
+  alias Mobilizon.Federation.ActivityPub
+  alias Mobilizon.Federation.ActivityPub.Federator
+
+  alias Mobilizon.Web.ActivityPub.ActorView
+  alias Mobilizon.Web.Cache
+
+  require Logger
+
+  action_fallback(:errors)
+
+  plug(Mobilizon.Web.Plugs.Federating when action in [:inbox, :relay])
+  plug(:relay_active? when action in [:relay])
+
+  def relay_active?(conn, _) do
+    if Config.get([:instance, :allow_relay]) do
+      conn
+    else
+      conn
+      |> put_status(404)
+      |> json("Not found")
+      |> halt()
+    end
+  end
+
+  def following(conn, %{"name" => name, "page" => page}) do
+    with {page, ""} <- Integer.parse(page),
+         %Actor{} = actor <- Actors.get_local_actor_by_name_with_preload(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_preload(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_preload(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_preload(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" => name}) do
+    with %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}))
+    end
+  end
+
+  # TODO: Ensure that this inbox is a recipient of the message
+  def inbox(%{assigns: %{valid_signature: true}} = conn, params) do
+    Logger.debug("Got something with valid signature inside inbox")
+    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.debug(inspect(conn.req_headers))
+    end
+
+    json(conn, "error")
+  end
+
+  def relay(conn, _params) do
+    with {status, %Actor{} = actor} when status in [:commit, :ok] <- Cache.get_relay() do
+      conn
+      |> put_resp_header("content-type", "application/activity+json")
+      |> json(ActorView.render("actor.json", %{actor: actor}))
+    end
+  end
+
+  def errors(conn, {:error, :not_found}) do
+    conn
+    |> put_status(404)
+    |> json("Not found")
+  end
+
+  def errors(conn, e) do
+    Logger.debug(inspect(e))
+
+    conn
+    |> put_status(500)
+    |> json("Unknown Error")
+  end
+end