mobilizon/lib/federation/activity_stream/converter/actor.ex

150 lines
4.6 KiB
Elixir

defmodule Mobilizon.Federation.ActivityStream.Converter.Actor do
@moduledoc """
Actor converter.
This module allows to convert events from ActivityStream format to our own
internal one, and back.
"""
alias Mobilizon.Actors.Actor, as: ActorModel
alias Mobilizon.Federation.ActivityPub.Utils
alias Mobilizon.Federation.ActivityStream.{Converter, Convertible}
alias Mobilizon.Service.HTTP.RemoteMediaDownloaderClient
alias Mobilizon.Service.RichMedia.Parser
alias Mobilizon.Web.Upload
@behaviour Converter
defimpl Convertible, for: ActorModel do
alias Mobilizon.Federation.ActivityStream.Converter.Actor, as: ActorConverter
defdelegate model_to_as(actor), to: ActorConverter
end
@allowed_types ["Application", "Group", "Organization", "Person", "Service"]
@doc """
Converts an AP object data to our internal data structure.
"""
@impl Converter
@spec as_to_model_data(map()) :: {:ok, map()}
def as_to_model_data(%{"type" => type} = data) when type in @allowed_types do
avatar =
download_picture(get_in(data, ["icon", "url"]), get_in(data, ["icon", "name"]), "avatar")
banner =
download_picture(get_in(data, ["image", "url"]), get_in(data, ["image", "name"]), "banner")
%{
url: data["id"],
avatar: avatar,
banner: banner,
name: data["name"],
preferred_username: data["preferredUsername"],
summary: data["summary"] || "",
keys: data["publicKey"]["publicKeyPem"],
inbox_url: data["inbox"],
outbox_url: data["outbox"],
following_url: data["following"],
followers_url: data["followers"],
members_url: data["members"],
resources_url: data["resources"],
todos_url: data["todos"],
events_url: data["events"],
posts_url: data["posts"],
discussions_url: data["discussions"],
shared_inbox_url: data["endpoints"]["sharedInbox"],
domain: URI.parse(data["id"]).host,
manually_approves_followers: data["manuallyApprovesFollowers"],
type: data["type"],
visibility: if(Map.get(data, "discoverable", false) == true, do: :public, else: :unlisted),
openness: data["openness"]
}
end
def as_to_model_data(_), do: :error
@doc """
Convert an actor struct to an ActivityStream representation.
"""
@impl Converter
@spec model_to_as(ActorModel.t()) :: map()
def model_to_as(%ActorModel{} = actor) do
actor_data = %{
"id" => actor.url,
"type" => actor.type,
"preferredUsername" => actor.preferred_username,
"name" => actor.name,
"summary" => actor.summary || "",
"following" => actor.following_url,
"followers" => actor.followers_url,
"members" => actor.members_url,
"resources" => actor.resources_url,
"todos" => actor.todos_url,
"posts" => actor.posts_url,
"events" => actor.events_url,
"discussions" => actor.discussions_url,
"inbox" => actor.inbox_url,
"outbox" => actor.outbox_url,
"url" => actor.url,
"endpoints" => %{
"sharedInbox" => actor.shared_inbox_url
},
"discoverable" => actor.visibility == :public,
"openness" => actor.openness,
"manuallyApprovesFollowers" => actor.manually_approves_followers,
"publicKey" => %{
"id" => "#{actor.url}#main-key",
"owner" => actor.url,
"publicKeyPem" =>
if(is_nil(actor.domain) and not is_nil(actor.keys),
do: Utils.pem_to_public_key_pem(actor.keys),
else: actor.keys
)
}
}
actor_data =
if actor.type == :Group do
Map.put(actor_data, "members", actor.members_url)
else
actor_data
end
actor_data =
if is_nil(actor.avatar) do
actor_data
else
Map.put(actor_data, "icon", %{
"type" => "Image",
"mediaType" => actor.avatar.content_type,
"url" => actor.avatar.url
})
end
if is_nil(actor.banner) do
actor_data
else
Map.put(actor_data, "image", %{
"type" => "Image",
"mediaType" => actor.banner.content_type,
"url" => actor.banner.url
})
end
end
@spec download_picture(String.t() | nil, String.t(), String.t()) :: map()
defp download_picture(nil, _name, _default_name), do: nil
defp download_picture(url, name, default_name) do
with {:ok, %{body: body, status: code, headers: response_headers}}
when code in 200..299 <- RemoteMediaDownloaderClient.get(url),
name <- name || Parser.get_filename_from_response(response_headers, url) || default_name,
{:ok, file} <- Upload.store(%{body: body, name: name}) do
file
end
end
end