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mobilizon/lib/service/activity_pub/converter/comment.ex
2019-09-26 17:45:47 +02:00

104 lines
2.9 KiB
Elixir

defmodule Mobilizon.Service.ActivityPub.Converter.Comment 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.Events.Comment, as: CommentModel
alias Mobilizon.Events.Event
alias Mobilizon.Service.ActivityPub
alias Mobilizon.Service.ActivityPub.{Converter, Convertible}
require Logger
@behaviour Converter
defimpl Convertible, for: CommentModel do
alias Mobilizon.Service.ActivityPub.Converter.Comment, as: CommentConverter
defdelegate model_to_as(comment), to: CommentConverter
end
@doc """
Converts an AP object data to our internal data structure.
"""
@impl Converter
@spec as_to_model_data(map) :: map
def as_to_model_data(object) do
{:ok, %Actor{id: actor_id}} = ActivityPub.get_or_fetch_by_url(object["actor"])
Logger.debug("Inserting full comment")
Logger.debug(inspect(object))
data = %{
"text" => object["content"],
"url" => object["id"],
"actor_id" => actor_id,
"in_reply_to_comment_id" => nil,
"event_id" => nil,
"uuid" => object["uuid"]
}
# We fetch the parent object
Logger.debug("We're fetching the parent object")
data =
if Map.has_key?(object, "inReplyTo") && object["inReplyTo"] != nil &&
object["inReplyTo"] != "" do
Logger.debug(fn -> "Object has inReplyTo #{object["inReplyTo"]}" end)
case ActivityPub.fetch_object_from_url(object["inReplyTo"]) do
# Reply to an event (Event)
{:ok, %Event{id: id}} ->
Logger.debug("Parent object is an event")
data |> Map.put("event_id", id)
# Reply to a comment (Comment)
{:ok, %CommentModel{id: id} = comment} ->
Logger.debug("Parent object is another comment")
data
|> Map.put("in_reply_to_comment_id", id)
|> Map.put("origin_comment_id", comment |> CommentModel.get_thread_id())
# Anything else is kind of a MP
{:error, parent} ->
Logger.debug("Parent object is something we don't handle")
Logger.debug(inspect(parent))
data
end
else
Logger.debug("No parent object for this comment")
data
end
data
end
@doc """
Make an AS comment object from an existing `Comment` structure.
"""
@impl Converter
@spec model_to_as(CommentModel.t()) :: map
def model_to_as(%CommentModel{} = comment) do
object = %{
"type" => "Note",
"to" => ["https://www.w3.org/ns/activitystreams#Public"],
"content" => comment.text,
"actor" => comment.actor.url,
"attributedTo" => comment.actor.url,
"uuid" => comment.uuid,
"id" => comment.url
}
if comment.in_reply_to_comment do
object |> Map.put("inReplyTo", comment.in_reply_to_comment.url || comment.event.url)
else
object
end
end
end