Fix various issues reported by Dializer

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/federation/activity_pub/actor.ex

@@ -108,15 +108,15 @@ defmodule Mobilizon.Federation.ActivityPub.Actor do
   @doc """
   Create an actor inside our database from username, using WebFinger to find out its AP ID and then fetch it
   """
-  @spec make_actor_from_nickname(nickname :: String.t(), preload :: boolean) ::
+  @spec make_actor_from_nickname(nickname :: String.t(), options :: Keyword.t()) ::
           {:ok, Actor.t()} | {:error, make_actor_errors | WebFinger.finger_errors()}
-  def make_actor_from_nickname(nickname, preload \\ false) do
+  def make_actor_from_nickname(nickname, options \\ []) do
     Logger.debug("Fingering actor from nickname #{nickname}")
 
     case WebFinger.finger(nickname) do
       {:ok, url} when is_binary(url) ->
         Logger.debug("Matched #{nickname} to URL #{url}, now making actor")
-        make_actor_from_url(url, preload: preload)
+        make_actor_from_url(url, options)
 
       {:error, e} ->
         {:error, e}

lib/federation/activity_pub/audience.ex

@@ -20,7 +20,7 @@ defmodule Mobilizon.Federation.ActivityPub.Audience do
   @doc """
   Get audience for an entity
   """
-  @spec get_audience(Entity.t()) :: audience()
+  @spec get_audience(Entity.t() | Participant.t()) :: audience()
   def get_audience(%Event{} = event) do
     extract_actors_from_event(event)
   end

lib/federation/activity_pub/refresher.ex

@@ -190,7 +190,7 @@ defmodule Mobilizon.Federation.ActivityPub.Refresher do
 
   # If we're handling an activity
   @spec handling_element(map()) :: {:ok, any, struct} | :error
-  @spec handling_element(String.t()) :: {:ok, struct} | {:error, any()}
+  @spec handling_element(String.t()) :: {:ok, struct} | {:ok, atom, struct} | {:error, any()}
   defp handling_element(%{"type" => activity_type} = data)
        when activity_type in ["Create", "Update", "Delete"] do
     object = get_in(data, ["object"])