forked from potsda.mn/mobilizon
149 lines
4.5 KiB
Elixir
149 lines
4.5 KiB
Elixir
defmodule Mobilizon.Service.ActivityPub.Converter.Comment do
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@moduledoc """
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Comment converter.
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This module allows to convert events from ActivityStream format to our own
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internal one, and back.
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"""
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alias Mobilizon.Actors.Actor
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alias Mobilizon.Events.Comment, as: CommentModel
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alias Mobilizon.Events.Event
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alias Mobilizon.Service.ActivityPub
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alias Mobilizon.Service.ActivityPub.{Converter, Convertible, Visibility}
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alias Mobilizon.Service.ActivityPub.Converter.Utils, as: ConverterUtils
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alias Mobilizon.Tombstone, as: TombstoneModel
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require Logger
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@behaviour Converter
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defimpl Convertible, for: CommentModel do
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alias Mobilizon.Service.ActivityPub.Converter.Comment, as: CommentConverter
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defdelegate model_to_as(comment), to: CommentConverter
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end
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@doc """
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Converts an AP object data to our internal data structure.
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"""
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@impl Converter
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@spec as_to_model_data(map) :: {:ok, map} | {:error, any()}
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def as_to_model_data(object) do
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Logger.debug("We're converting raw ActivityStream data to a comment entity")
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Logger.debug(inspect(object))
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with author_url <- Map.get(object, "actor") || Map.get(object, "attributedTo"),
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{:ok, %Actor{id: actor_id, domain: domain}} <-
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ActivityPub.get_or_fetch_actor_by_url(author_url),
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{:tags, tags} <- {:tags, ConverterUtils.fetch_tags(Map.get(object, "tag", []))},
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{:mentions, mentions} <-
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{:mentions, ConverterUtils.fetch_mentions(Map.get(object, "tag", []))} do
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Logger.debug("Inserting full comment")
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Logger.debug(inspect(object))
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data = %{
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text: object["content"],
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url: object["id"],
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actor_id: actor_id,
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in_reply_to_comment_id: nil,
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event_id: nil,
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uuid: object["uuid"],
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tags: tags,
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mentions: mentions,
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local: is_nil(domain),
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visibility: if(Visibility.is_public?(object), do: :public, else: :private)
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}
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# We fetch the parent object
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Logger.debug("We're fetching the parent object")
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data =
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if Map.has_key?(object, "inReplyTo") && object["inReplyTo"] != nil &&
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object["inReplyTo"] != "" do
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Logger.debug(fn -> "Object has inReplyTo #{object["inReplyTo"]}" end)
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case ActivityPub.fetch_object_from_url(object["inReplyTo"]) do
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# Reply to an event (Event)
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{:ok, %Event{id: id}} ->
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Logger.debug("Parent object is an event")
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data |> Map.put(:event_id, id)
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# Reply to a comment (Comment)
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{:ok, %CommentModel{id: id} = comment} ->
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Logger.debug("Parent object is another comment")
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data
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|> Map.put(:in_reply_to_comment_id, id)
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|> Map.put(:origin_comment_id, comment |> CommentModel.get_thread_id())
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|> Map.put(:event_id, comment.event_id)
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# Anything else is kind of a MP
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{:error, parent} ->
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Logger.warn("Parent object is something we don't handle")
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Logger.debug(inspect(parent))
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data
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end
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else
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Logger.debug("No parent object for this comment")
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data
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end
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{:ok, data}
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else
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err ->
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{:error, err}
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end
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end
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@doc """
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Make an AS comment object from an existing `Comment` structure.
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"""
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@impl Converter
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@spec model_to_as(CommentModel.t()) :: map
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def model_to_as(%CommentModel{deleted_at: nil} = comment) do
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to =
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if comment.visibility == :public,
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do: ["https://www.w3.org/ns/activitystreams#Public"],
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else: [comment.actor.followers_url]
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object = %{
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"type" => "Note",
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"to" => to,
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"cc" => [],
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"content" => comment.text,
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"mediaType" => "text/html",
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"actor" => comment.actor.url,
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"attributedTo" => comment.actor.url,
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"uuid" => comment.uuid,
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"id" => comment.url,
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"tag" =>
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ConverterUtils.build_mentions(comment.mentions) ++ ConverterUtils.build_tags(comment.tags)
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}
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cond do
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comment.in_reply_to_comment ->
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Map.put(object, "inReplyTo", comment.in_reply_to_comment.url)
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comment.event ->
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Map.put(object, "inReplyTo", comment.event.url)
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true ->
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object
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end
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end
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@impl Converter
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@spec model_to_as(CommentModel.t()) :: map
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@doc """
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A "soft-deleted" comment is a tombstone
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"""
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def model_to_as(%CommentModel{} = comment) do
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Convertible.model_to_as(%TombstoneModel{
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uri: comment.url,
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inserted_at: comment.deleted_at
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})
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end
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end
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