defmodule Mobilizon.Federation.ActivityStream.Converter.Discussion do @moduledoc """ Comment converter. This module allows to convert events from ActivityStream format to our own internal one, and back. """ alias Mobilizon.Actors.Actor alias Mobilizon.Discussions.Discussion alias Mobilizon.Federation.ActivityPub.Actor, as: ActivityPubActor alias Mobilizon.Federation.ActivityStream.{Converter, Convertible} alias Mobilizon.Federation.ActivityStream.Converter.Discussion, as: DiscussionConverter alias Mobilizon.Storage.Repo import Mobilizon.Service.Guards, only: [is_valid_string: 1] require Logger @behaviour Converter defimpl Convertible, for: Discussion do defdelegate model_to_as(comment), to: DiscussionConverter end @doc """ Make an AS comment object from an existing `discussion` structure. """ @impl Converter @spec model_to_as(Discussion.t()) :: map def model_to_as(%Discussion{} = discussion) do discussion = Repo.preload(discussion, [:last_comment, :actor, :creator]) %{ "type" => "Note", "to" => [discussion.actor.members_url], "cc" => [], "name" => discussion.title, "content" => discussion.last_comment.text, "mediaType" => "text/html", "actor" => discussion.creator.url, "attributedTo" => discussion.actor.url, "id" => discussion.url, "publishedAt" => discussion.inserted_at, "context" => discussion.url } end @impl Converter @spec as_to_model_data(map) :: map() | {:error, atom()} def as_to_model_data(%{"type" => "Note", "name" => name} = object) when is_valid_string(name) do case extract_actors(object) do %{actor_id: actor_id, creator_id: creator_id} -> %{actor_id: actor_id, creator_id: creator_id, title: name, url: object["id"]} {:error, error} -> {:error, error} end end @spec extract_actors(map()) :: %{actor_id: String.t(), creator_id: String.t()} | {:error, atom()} defp extract_actors(%{"actor" => creator_url, "attributedTo" => actor_url} = _object) when is_valid_string(creator_url) and is_valid_string(actor_url) do with {:ok, %Actor{id: creator_id, suspended: false}} <- ActivityPubActor.get_or_fetch_actor_by_url(creator_url), {:ok, %Actor{id: actor_id, suspended: false}} <- ActivityPubActor.get_or_fetch_actor_by_url(actor_url) do %{actor_id: actor_id, creator_id: creator_id} else {:error, error} -> {:error, error} end end end