+# 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.{Repo, Object}
+
+ alias Pleroma.Activity
+ alias Pleroma.Object
+ alias Pleroma.Object.Fetcher
+ alias Pleroma.ObjectTombstone
+ alias Pleroma.Repo
+ alias Pleroma.User
+
import Ecto.Query
+ import Ecto.Changeset
+
+ require Logger
schema "objects" do
- field :data, :map
+ 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("? @> ?", object.data, ^%{id: ap_id}))
+ Repo.one(from(object in Object, where: fragment("(?)->>'id' = ?", object.data, ^ap_id)))
+ end
+
+ def normalize(_, fetch_remote \\ true)
+ # 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
+
+ # A hack for fake activities
+ def normalize(%Activity{data: %{"object" => %{"fake" => true} = data}}, _) do
+ %Object{id: "pleroma:fake_object_id", data: data}
end
+ # Catch and log Object.normalize() calls where the Activity's child object is not
+ # preloaded.
+ def normalize(%Activity{data: %{"object" => %{"id" => ap_id}}}, fetch_remote) do
+ Logger.debug(
+ "Object.normalize() called without preloaded object (#{ap_id}). Consider preloading the object!"
+ )
+
+ Logger.debug("Backtrace: #{inspect(Process.info(:erlang.self(), :current_stacktrace))}")
+
+ normalize(ap_id, fetch_remote)
+ end
+
+ def normalize(%Activity{data: %{"object" => ap_id}}, fetch_remote) do
+ Logger.debug(
+ "Object.normalize() called without preloaded object (#{ap_id}). Consider preloading the object!"
+ )
+
+ Logger.debug("Backtrace: #{inspect(Process.info(:erlang.self(), :current_stacktrace))}")
+
+ normalize(ap_id, fetch_remote)
+ end
+
+ # Old way, try fetching the object through cache.
+ def normalize(%{"id" => ap_id}, fetch_remote), do: normalize(ap_id, fetch_remote)
+ def normalize(ap_id, false) when is_binary(ap_id), do: get_cached_by_ap_id(ap_id)
+ def normalize(ap_id, true) when is_binary(ap_id), do: Fetcher.fetch_object_from_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
- if Mix.env == :test do
- get_by_ap_id(ap_id)
+ 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
- key = "object:#{ap_id}"
- Cachex.get!(:user_cache, key, fallback: fn(_) ->
- object = get_by_ap_id(ap_id)
- if object do
- {:commit, object}
- else
- {:ignore, object}
- end
- end)
+ e -> e
end
end
- def context_mapping(context) do
- %Object{data: %{"id" => context}}
+ def increase_replies_count(ap_id) do
+ Object
+ |> where([o], fragment("?->>'id' = ?::text", o.data, ^to_string(ap_id)))
+ |> update([o],
+ set: [
+ data:
+ fragment(
+ """
+ jsonb_set(?, '{repliesCount}',
+ (coalesce((?->>'repliesCount')::int, 0) + 1)::varchar::jsonb, true)
+ """,
+ o.data,
+ o.data
+ )
+ ]
+ )
+ |> Repo.update_all([])
+ |> case do
+ {1, [object]} -> set_cache(object)
+ _ -> {:error, "Not found"}
+ end
+ end
+
+ def decrease_replies_count(ap_id) do
+ Object
+ |> where([o], fragment("?->>'id' = ?::text", o.data, ^to_string(ap_id)))
+ |> update([o],
+ set: [
+ data:
+ fragment(
+ """
+ jsonb_set(?, '{repliesCount}',
+ (greatest(0, (?->>'repliesCount')::int - 1))::varchar::jsonb, true)
+ """,
+ o.data,
+ o.data
+ )
+ ]
+ )
+ |> Repo.update_all([])
+ |> case do
+ {1, [object]} -> set_cache(object)
+ _ -> {:error, "Not found"}
+ end
end
end
projects / akkoma / blobdiff