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