akkoma/lib/pleroma/object.ex

133 lines
3.4 KiB
Elixir

# Pleroma: A lightweight social networking server
# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Object do
use Ecto.Schema
alias Pleroma.Activity
alias Pleroma.Object
alias Pleroma.ObjectTombstone
alias Pleroma.Repo
alias Pleroma.User
import Ecto.Query
import Ecto.Changeset
require Logger
schema "objects" do
field(:data, :map)
timestamps()
end
def create(data) do
Object.change(%Object{}, %{data: data})
|> Repo.insert()
end
def change(struct, params \\ %{}) do
struct
|> cast(params, [:data])
|> validate_required([:data])
|> unique_constraint(:ap_id, name: :objects_unique_apid_index)
end
def get_by_ap_id(nil), do: nil
def get_by_ap_id(ap_id) do
Repo.one(from(object in Object, where: fragment("(?)->>'id' = ?", object.data, ^ap_id)))
end
# If we pass an Activity to Object.normalize(), we can try to use the preloaded object.
# Use this whenever possible, especially when walking graphs in an O(N) loop!
def normalize(%Activity{object: %Object{} = object}), do: object
# Catch and log Object.normalize() calls where the Activity's child object is not
# preloaded.
def normalize(%Activity{data: %{"object" => %{"id" => ap_id}}}) do
Logger.info(
"Object.normalize() called without preloaded object (#{ap_id}). Consider preloading the object!"
)
normalize(ap_id)
end
def normalize(%Activity{data: %{"object" => ap_id}}) do
Logger.info(
"Object.normalize() called without preloaded object (#{ap_id}). Consider preloading the object!"
)
normalize(ap_id)
end
# Old way, try fetching the object through cache.
def normalize(%{"id" => ap_id}), do: normalize(ap_id)
def normalize(ap_id) when is_binary(ap_id), do: get_cached_by_ap_id(ap_id)
def normalize(_), do: nil
# Owned objects can only be mutated by their owner
def authorize_mutation(%Object{data: %{"actor" => actor}}, %User{ap_id: ap_id}),
do: actor == ap_id
# Legacy objects can be mutated by anybody
def authorize_mutation(%Object{}, %User{}), do: true
def get_cached_by_ap_id(ap_id) do
key = "object:#{ap_id}"
Cachex.fetch!(:object_cache, key, fn _ ->
object = get_by_ap_id(ap_id)
if object do
{:commit, object}
else
{:ignore, object}
end
end)
end
def context_mapping(context) do
Object.change(%Object{}, %{data: %{"id" => context}})
end
def make_tombstone(%Object{data: %{"id" => id, "type" => type}}, deleted \\ DateTime.utc_now()) do
%ObjectTombstone{
id: id,
formerType: type,
deleted: deleted
}
|> Map.from_struct()
end
def swap_object_with_tombstone(object) do
tombstone = make_tombstone(object)
object
|> Object.change(%{data: tombstone})
|> Repo.update()
end
def delete(%Object{data: %{"id" => id}} = object) do
with {:ok, _obj} = swap_object_with_tombstone(object),
deleted_activity = Activity.delete_by_ap_id(id),
{:ok, true} <- Cachex.del(:object_cache, "object:#{id}") do
{:ok, object, deleted_activity}
end
end
def set_cache(%Object{data: %{"id" => ap_id}} = object) do
Cachex.put(:object_cache, "object:#{ap_id}", object)
{:ok, object}
end
def update_and_set_cache(changeset) do
with {:ok, object} <- Repo.update(changeset) do
set_cache(object)
else
e -> e
end
end
end