defmodule Mobilizon.Service.Export.Common do @moduledoc """ Common tools for exportation """ alias Mobilizon.{Actors, Events, Posts, Users} alias Mobilizon.Actors.Actor alias Mobilizon.Events.{Event, FeedToken} alias Mobilizon.Posts.Post alias Mobilizon.Storage.Page alias Mobilizon.Users.User @spec fetch_actor_event_feed(String.t(), integer()) :: {:ok, Actor.t(), [Event.t()], [Post.t()]} | {:error, :actor_not_public | :actor_not_found} def fetch_actor_event_feed(name, limit) do case Actors.get_actor_by_name(name) do %Actor{} = actor -> if Actor.is_public_visibility?(actor) do %Page{elements: events} = Events.list_public_events_for_actor(actor, 1, limit) %Page{elements: posts} = Posts.get_public_posts_for_group(actor, 1, limit) {:ok, actor, events, posts} else {:error, :actor_not_public} end nil -> {:error, :actor_not_found} end end @typep token_feed_data :: %{ type: :actor | :user, actor: Actor.t() | nil, user: User.t(), events: [Event.t()], token: String.t() } # Only events, not posts @spec fetch_events_from_token(String.t(), integer()) :: token_feed_data | {:error, :bad_token | :token_not_found} def fetch_events_from_token(token, limit) do case uuid_from_token(token) do {:ok, uuid} -> case Events.get_feed_token(uuid) do nil -> {:error, :token_not_found} %FeedToken{actor: actor, user: %User{} = user} -> produce_actor_feed(actor, user, token, limit) end {:error, :bad_token} -> {:error, :bad_token} end end @spec uuid_from_token(String.t()) :: {:ok, String.t()} | {:error, :bad_token} defp uuid_from_token(token) do case ShortUUID.decode(token) do {:ok, uuid} -> case Ecto.UUID.cast(uuid) do {:ok, _uuid} -> {:ok, uuid} :error -> {:error, :bad_token} end {:error, _err} -> {:error, :bad_token} end end @spec produce_actor_feed(Actor.t() | nil, User.t(), String.t(), integer()) :: token_feed_data defp produce_actor_feed(%Actor{} = actor, %User{} = user, token, limit) do %{ type: :actor, actor: actor, events: fetch_actor_private_events(actor, limit), user: user, token: token } end defp produce_actor_feed(nil, %User{} = user, token, limit) do with actors <- Users.get_actors_for_user(user), events <- actors |> Enum.map(&fetch_actor_private_events(&1, limit)) |> Enum.concat() do %{type: :user, events: events, user: user, token: token, actor: nil} end end @spec fetch_instance_public_content(integer()) :: {:ok, list(Event.t()), list(Post.t())} def fetch_instance_public_content(limit) do %Page{elements: events} = Events.list_public_local_events(1, limit) %Page{elements: posts} = Posts.list_public_local_posts(1, limit) {:ok, events, posts} end @spec fetch_actor_private_events(Actor.t(), integer()) :: list(Event.t()) def fetch_actor_private_events(%Actor{} = actor, limit) do actor |> fetch_identity_participations(limit) |> participations_to_events() end @spec fetch_identity_participations(Actor.t(), integer()) :: Page.t() defp fetch_identity_participations(%Actor{} = actor, limit) do with %Page{} = page <- Events.list_event_participations_for_actor(actor, 1, limit) do page end end defp participations_to_events(%Page{elements: participations}) do participations |> Enum.map(& &1.event_id) |> Enum.map(&Events.get_event_with_preload!/1) end end