debianize-mobilizon/lib/federation/activity_stream/converter/discussion.ex

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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
alias Mobilizon.Federation.ActivityStream.{Converter, Convertible}
alias Mobilizon.Federation.ActivityStream.Converter.Discussion, as: DiscussionConverter
alias Mobilizon.Storage.Repo
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.followers_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) :: {:ok, map} | {:error, any()}
def as_to_model_data(%{"type" => "Note", "name" => name} = object) when not is_nil(name) do
with creator_url <- Map.get(object, "actor"),
{:ok, %Actor{id: creator_id, suspended: false}} <-
ActivityPub.get_or_fetch_actor_by_url(creator_url),
actor_url <- Map.get(object, "attributedTo"),
{:ok, %Actor{id: actor_id, suspended: false}} <-
ActivityPub.get_or_fetch_actor_by_url(actor_url) do
%{
title: name,
actor_id: actor_id,
creator_id: creator_id,
url: object["id"]
}
end
end
end