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