851 lines
24 KiB
Elixir
851 lines
24 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.Web.ActivityPub.ActivityPub do
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alias Pleroma.{Activity, Repo, Object, Upload, User, Notification}
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alias Pleroma.Web.ActivityPub.{Transmogrifier, MRF}
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alias Pleroma.Web.WebFinger
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alias Pleroma.Web.Federator
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alias Pleroma.Web.OStatus
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import Ecto.Query
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import Pleroma.Web.ActivityPub.Utils
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require Logger
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@httpoison Application.get_env(:pleroma, :httpoison)
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# For Announce activities, we filter the recipients based on following status for any actors
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# that match actual users. See issue #164 for more information about why this is necessary.
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defp get_recipients(%{"type" => "Announce"} = data) do
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to = data["to"] || []
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cc = data["cc"] || []
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recipients = to ++ cc
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actor = User.get_cached_by_ap_id(data["actor"])
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recipients
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|> Enum.filter(fn recipient ->
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case User.get_cached_by_ap_id(recipient) do
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nil ->
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true
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user ->
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User.following?(user, actor)
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end
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end)
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{recipients, to, cc}
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end
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defp get_recipients(data) do
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to = data["to"] || []
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cc = data["cc"] || []
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recipients = to ++ cc
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{recipients, to, cc}
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end
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defp check_actor_is_active(actor) do
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if not is_nil(actor) do
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with user <- User.get_cached_by_ap_id(actor),
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false <- user.info.deactivated do
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:ok
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else
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_e -> :reject
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end
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else
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:ok
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end
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end
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defp check_remote_limit(%{"object" => %{"content" => content}}) do
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limit = Pleroma.Config.get([:instance, :remote_limit])
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String.length(content) <= limit
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end
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defp check_remote_limit(_), do: true
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def insert(map, local \\ true) when is_map(map) do
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with nil <- Activity.normalize(map),
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map <- lazy_put_activity_defaults(map),
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:ok <- check_actor_is_active(map["actor"]),
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{_, true} <- {:remote_limit_error, check_remote_limit(map)},
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{:ok, map} <- MRF.filter(map),
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:ok <- insert_full_object(map) do
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{recipients, _, _} = get_recipients(map)
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{:ok, activity} =
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Repo.insert(%Activity{
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data: map,
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local: local,
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actor: map["actor"],
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recipients: recipients
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})
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Notification.create_notifications(activity)
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stream_out(activity)
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{:ok, activity}
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else
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%Activity{} = activity -> {:ok, activity}
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error -> {:error, error}
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end
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end
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def stream_out(activity) do
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public = "https://www.w3.org/ns/activitystreams#Public"
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if activity.data["type"] in ["Create", "Announce"] do
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Pleroma.Web.Streamer.stream("user", activity)
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Pleroma.Web.Streamer.stream("list", activity)
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if Enum.member?(activity.data["to"], public) do
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Pleroma.Web.Streamer.stream("public", activity)
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if activity.local do
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Pleroma.Web.Streamer.stream("public:local", activity)
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end
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activity.data["object"]
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|> Map.get("tag", [])
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|> Enum.filter(fn tag -> is_bitstring(tag) end)
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|> Enum.map(fn tag -> Pleroma.Web.Streamer.stream("hashtag:" <> tag, activity) end)
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if activity.data["object"]["attachment"] != [] do
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Pleroma.Web.Streamer.stream("public:media", activity)
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if activity.local do
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Pleroma.Web.Streamer.stream("public:local:media", activity)
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end
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end
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else
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if !Enum.member?(activity.data["cc"] || [], public) &&
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!Enum.member?(
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activity.data["to"],
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User.get_by_ap_id(activity.data["actor"]).follower_address
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),
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do: Pleroma.Web.Streamer.stream("direct", activity)
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end
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end
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end
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def create(%{to: to, actor: actor, context: context, object: object} = params) do
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additional = params[:additional] || %{}
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# only accept false as false value
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local = !(params[:local] == false)
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published = params[:published]
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with create_data <-
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make_create_data(
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%{to: to, actor: actor, published: published, context: context, object: object},
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additional
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),
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{:ok, activity} <- insert(create_data, local),
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:ok <- maybe_federate(activity),
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{:ok, _actor} <- User.increase_note_count(actor) do
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{:ok, activity}
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end
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end
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def accept(%{to: to, actor: actor, object: object} = params) do
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# only accept false as false value
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local = !(params[:local] == false)
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with data <- %{"to" => to, "type" => "Accept", "actor" => actor, "object" => object},
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{:ok, activity} <- insert(data, local),
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:ok <- maybe_federate(activity) do
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{:ok, activity}
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end
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end
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def reject(%{to: to, actor: actor, object: object} = params) do
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# only accept false as false value
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local = !(params[:local] == false)
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with data <- %{"to" => to, "type" => "Reject", "actor" => actor, "object" => object},
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{:ok, activity} <- insert(data, local),
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:ok <- maybe_federate(activity) do
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{:ok, activity}
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end
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end
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def update(%{to: to, cc: cc, actor: actor, object: object} = params) do
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# only accept false as false value
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local = !(params[:local] == false)
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with data <- %{
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"to" => to,
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"cc" => cc,
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"type" => "Update",
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"actor" => actor,
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"object" => object
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},
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{:ok, activity} <- insert(data, local),
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:ok <- maybe_federate(activity) do
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{:ok, activity}
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end
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end
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# TODO: This is weird, maybe we shouldn't check here if we can make the activity.
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def like(
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%User{ap_id: ap_id} = user,
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%Object{data: %{"id" => _}} = object,
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activity_id \\ nil,
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local \\ true
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) do
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with nil <- get_existing_like(ap_id, object),
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like_data <- make_like_data(user, object, activity_id),
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{:ok, activity} <- insert(like_data, local),
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{:ok, object} <- add_like_to_object(activity, object),
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:ok <- maybe_federate(activity) do
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{:ok, activity, object}
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else
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%Activity{} = activity -> {:ok, activity, object}
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error -> {:error, error}
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end
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end
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def unlike(
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%User{} = actor,
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%Object{} = object,
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activity_id \\ nil,
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local \\ true
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) do
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with %Activity{} = like_activity <- get_existing_like(actor.ap_id, object),
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unlike_data <- make_unlike_data(actor, like_activity, activity_id),
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{:ok, unlike_activity} <- insert(unlike_data, local),
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{:ok, _activity} <- Repo.delete(like_activity),
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{:ok, object} <- remove_like_from_object(like_activity, object),
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:ok <- maybe_federate(unlike_activity) do
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{:ok, unlike_activity, like_activity, object}
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else
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_e -> {:ok, object}
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end
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end
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def announce(
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%User{ap_id: _} = user,
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%Object{data: %{"id" => _}} = object,
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activity_id \\ nil,
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local \\ true,
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public \\ true
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) do
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with true <- is_public?(object),
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announce_data <- make_announce_data(user, object, activity_id, public),
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{:ok, activity} <- insert(announce_data, local),
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{:ok, object} <- add_announce_to_object(activity, object),
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:ok <- maybe_federate(activity) do
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{:ok, activity, object}
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else
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error -> {:error, error}
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end
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end
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def unannounce(
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%User{} = actor,
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%Object{} = object,
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activity_id \\ nil,
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local \\ true
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) do
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with %Activity{} = announce_activity <- get_existing_announce(actor.ap_id, object),
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unannounce_data <- make_unannounce_data(actor, announce_activity, activity_id),
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{:ok, unannounce_activity} <- insert(unannounce_data, local),
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:ok <- maybe_federate(unannounce_activity),
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{:ok, _activity} <- Repo.delete(announce_activity),
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{:ok, object} <- remove_announce_from_object(announce_activity, object) do
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{:ok, unannounce_activity, object}
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else
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_e -> {:ok, object}
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end
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end
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def follow(follower, followed, activity_id \\ nil, local \\ true) do
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with data <- make_follow_data(follower, followed, activity_id),
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{:ok, activity} <- insert(data, local),
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:ok <- maybe_federate(activity) do
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{:ok, activity}
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end
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end
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def unfollow(follower, followed, activity_id \\ nil, local \\ true) do
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with %Activity{} = follow_activity <- fetch_latest_follow(follower, followed),
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{:ok, follow_activity} <- update_follow_state(follow_activity, "cancelled"),
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unfollow_data <- make_unfollow_data(follower, followed, follow_activity, activity_id),
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{:ok, activity} <- insert(unfollow_data, local),
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:ok <- maybe_federate(activity) do
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{:ok, activity}
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end
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end
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def delete(%Object{data: %{"id" => id, "actor" => actor}} = object, local \\ true) do
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user = User.get_cached_by_ap_id(actor)
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data = %{
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"type" => "Delete",
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"actor" => actor,
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"object" => id,
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"to" => [user.follower_address, "https://www.w3.org/ns/activitystreams#Public"]
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}
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with {:ok, _} <- Object.delete(object),
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{:ok, activity} <- insert(data, local),
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:ok <- maybe_federate(activity),
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{:ok, _actor} <- User.decrease_note_count(user) do
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{:ok, activity}
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end
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end
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def block(blocker, blocked, activity_id \\ nil, local \\ true) do
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ap_config = Application.get_env(:pleroma, :activitypub)
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unfollow_blocked = Keyword.get(ap_config, :unfollow_blocked)
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outgoing_blocks = Keyword.get(ap_config, :outgoing_blocks)
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with true <- unfollow_blocked do
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follow_activity = fetch_latest_follow(blocker, blocked)
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if follow_activity do
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unfollow(blocker, blocked, nil, local)
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end
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end
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with true <- outgoing_blocks,
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block_data <- make_block_data(blocker, blocked, activity_id),
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{:ok, activity} <- insert(block_data, local),
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:ok <- maybe_federate(activity) do
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{:ok, activity}
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else
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_e -> {:ok, nil}
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end
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end
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def unblock(blocker, blocked, activity_id \\ nil, local \\ true) do
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with %Activity{} = block_activity <- fetch_latest_block(blocker, blocked),
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unblock_data <- make_unblock_data(blocker, blocked, block_activity, activity_id),
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{:ok, activity} <- insert(unblock_data, local),
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:ok <- maybe_federate(activity) do
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{:ok, activity}
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end
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end
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def fetch_activities_for_context(context, opts \\ %{}) do
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public = ["https://www.w3.org/ns/activitystreams#Public"]
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recipients =
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if opts["user"], do: [opts["user"].ap_id | opts["user"].following] ++ public, else: public
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query = from(activity in Activity)
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query =
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query
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|> restrict_blocked(opts)
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|> restrict_recipients(recipients, opts["user"])
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query =
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from(
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activity in query,
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where:
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fragment(
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"?->>'type' = ? and ?->>'context' = ?",
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activity.data,
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"Create",
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activity.data,
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^context
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),
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order_by: [desc: :id]
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)
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Repo.all(query)
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end
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def fetch_public_activities(opts \\ %{}) do
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q = fetch_activities_query(["https://www.w3.org/ns/activitystreams#Public"], opts)
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q
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|> restrict_unlisted()
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|> Repo.all()
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|> Enum.reverse()
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end
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@valid_visibilities ~w[direct unlisted public private]
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defp restrict_visibility(query, %{visibility: visibility})
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when visibility in @valid_visibilities do
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query =
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from(
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a in query,
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where:
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fragment("activity_visibility(?, ?, ?) = ?", a.actor, a.recipients, a.data, ^visibility)
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)
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Ecto.Adapters.SQL.to_sql(:all, Repo, query)
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query
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end
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defp restrict_visibility(_query, %{visibility: visibility})
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when visibility not in @valid_visibilities do
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Logger.error("Could not restrict visibility to #{visibility}")
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end
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defp restrict_visibility(query, _visibility), do: query
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def fetch_user_activities(user, reading_user, params \\ %{}) do
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params =
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params
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|> Map.put("type", ["Create", "Announce"])
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|> Map.put("actor_id", user.ap_id)
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|> Map.put("whole_db", true)
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|> Map.put("pinned_activity_ids", user.info.pinned_activities)
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recipients =
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if reading_user do
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["https://www.w3.org/ns/activitystreams#Public"] ++
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[reading_user.ap_id | reading_user.following]
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else
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["https://www.w3.org/ns/activitystreams#Public"]
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end
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fetch_activities(recipients, params)
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|> Enum.reverse()
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end
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defp restrict_since(query, %{"since_id" => since_id}) do
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from(activity in query, where: activity.id > ^since_id)
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end
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defp restrict_since(query, _), do: query
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defp restrict_tag(query, %{"tag" => tag}) do
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from(
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activity in query,
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where: fragment("? <@ (? #> '{\"object\",\"tag\"}')", ^tag, activity.data)
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)
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end
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defp restrict_tag(query, _), do: query
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defp restrict_to_cc(query, recipients_to, recipients_cc) do
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from(
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activity in query,
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where:
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fragment(
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"(?->'to' \\?| ?) or (?->'cc' \\?| ?)",
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activity.data,
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^recipients_to,
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activity.data,
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^recipients_cc
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)
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)
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end
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defp restrict_recipients(query, [], _user), do: query
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defp restrict_recipients(query, recipients, nil) do
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from(activity in query, where: fragment("? && ?", ^recipients, activity.recipients))
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end
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defp restrict_recipients(query, recipients, user) do
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from(
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activity in query,
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where: fragment("? && ?", ^recipients, activity.recipients),
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or_where: activity.actor == ^user.ap_id
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)
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end
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defp restrict_limit(query, %{"limit" => limit}) do
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from(activity in query, limit: ^limit)
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end
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defp restrict_limit(query, _), do: query
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defp restrict_local(query, %{"local_only" => true}) do
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from(activity in query, where: activity.local == true)
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end
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defp restrict_local(query, _), do: query
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defp restrict_max(query, %{"max_id" => max_id}) do
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from(activity in query, where: activity.id < ^max_id)
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end
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defp restrict_max(query, _), do: query
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defp restrict_actor(query, %{"actor_id" => actor_id}) do
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from(activity in query, where: activity.actor == ^actor_id)
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end
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defp restrict_actor(query, _), do: query
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defp restrict_type(query, %{"type" => type}) when is_binary(type) do
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restrict_type(query, %{"type" => [type]})
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end
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defp restrict_type(query, %{"type" => type}) do
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from(activity in query, where: fragment("?->>'type' = ANY(?)", activity.data, ^type))
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end
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defp restrict_type(query, _), do: query
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defp restrict_favorited_by(query, %{"favorited_by" => ap_id}) do
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from(
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activity in query,
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where: fragment("? <@ (? #> '{\"object\",\"likes\"}')", ^ap_id, activity.data)
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)
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end
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defp restrict_favorited_by(query, _), do: query
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defp restrict_media(query, %{"only_media" => val}) when val == "true" or val == "1" do
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from(
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activity in query,
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where: fragment("not (? #> '{\"object\",\"attachment\"}' = ?)", activity.data, ^[])
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)
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end
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defp restrict_media(query, _), do: query
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defp restrict_replies(query, %{"exclude_replies" => val}) when val == "true" or val == "1" do
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from(
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activity in query,
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where: fragment("?->'object'->>'inReplyTo' is null", activity.data)
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)
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end
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defp restrict_replies(query, _), do: query
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defp restrict_reblogs(query, %{"exclude_reblogs" => val}) when val == "true" or val == "1" do
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from(activity in query, where: fragment("?->>'type' != 'Announce'", activity.data))
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end
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defp restrict_reblogs(query, _), do: query
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defp restrict_blocked(query, %{"blocking_user" => %User{info: info}}) do
|
|
blocks = info.blocks || []
|
|
domain_blocks = info.domain_blocks || []
|
|
|
|
from(
|
|
activity in query,
|
|
where: fragment("not (? = ANY(?))", activity.actor, ^blocks),
|
|
where: fragment("not (?->'to' \\?| ?)", activity.data, ^blocks),
|
|
where: fragment("not (split_part(?, '/', 3) = ANY(?))", activity.actor, ^domain_blocks)
|
|
)
|
|
end
|
|
|
|
defp restrict_blocked(query, _), do: query
|
|
|
|
defp restrict_unlisted(query) do
|
|
from(
|
|
activity in query,
|
|
where:
|
|
fragment(
|
|
"not (coalesce(?->'cc', '{}'::jsonb) \\?| ?)",
|
|
activity.data,
|
|
^["https://www.w3.org/ns/activitystreams#Public"]
|
|
)
|
|
)
|
|
end
|
|
|
|
defp restrict_pinned(query, %{"pinned" => "true", "pinned_activity_ids" => ids}) do
|
|
from(activity in query, where: activity.id in ^ids)
|
|
end
|
|
|
|
defp restrict_pinned(query, _), do: query
|
|
|
|
def fetch_activities_query(recipients, opts \\ %{}) do
|
|
base_query =
|
|
from(
|
|
activity in Activity,
|
|
limit: 20,
|
|
order_by: [fragment("? desc nulls last", activity.id)]
|
|
)
|
|
|
|
base_query
|
|
|> restrict_recipients(recipients, opts["user"])
|
|
|> restrict_tag(opts)
|
|
|> restrict_since(opts)
|
|
|> restrict_local(opts)
|
|
|> restrict_limit(opts)
|
|
|> restrict_max(opts)
|
|
|> restrict_actor(opts)
|
|
|> restrict_type(opts)
|
|
|> restrict_favorited_by(opts)
|
|
|> restrict_blocked(opts)
|
|
|> restrict_media(opts)
|
|
|> restrict_visibility(opts)
|
|
|> restrict_replies(opts)
|
|
|> restrict_reblogs(opts)
|
|
|> restrict_pinned(opts)
|
|
end
|
|
|
|
def fetch_activities(recipients, opts \\ %{}) do
|
|
fetch_activities_query(recipients, opts)
|
|
|> Repo.all()
|
|
|> Enum.reverse()
|
|
end
|
|
|
|
def fetch_activities_bounded(recipients_to, recipients_cc, opts \\ %{}) do
|
|
fetch_activities_query([], opts)
|
|
|> restrict_to_cc(recipients_to, recipients_cc)
|
|
|> Repo.all()
|
|
|> Enum.reverse()
|
|
end
|
|
|
|
def upload(file, opts \\ []) do
|
|
with {:ok, data} <- Upload.store(file, opts) do
|
|
obj_data =
|
|
if opts[:actor] do
|
|
Map.put(data, "actor", opts[:actor])
|
|
else
|
|
data
|
|
end
|
|
|
|
Repo.insert(%Object{data: obj_data})
|
|
end
|
|
end
|
|
|
|
def user_data_from_user_object(data) do
|
|
avatar =
|
|
data["icon"]["url"] &&
|
|
%{
|
|
"type" => "Image",
|
|
"url" => [%{"href" => data["icon"]["url"]}]
|
|
}
|
|
|
|
banner =
|
|
data["image"]["url"] &&
|
|
%{
|
|
"type" => "Image",
|
|
"url" => [%{"href" => data["image"]["url"]}]
|
|
}
|
|
|
|
locked = data["manuallyApprovesFollowers"] || false
|
|
data = Transmogrifier.maybe_fix_user_object(data)
|
|
|
|
user_data = %{
|
|
ap_id: data["id"],
|
|
info: %{
|
|
"ap_enabled" => true,
|
|
"source_data" => data,
|
|
"banner" => banner,
|
|
"locked" => locked
|
|
},
|
|
avatar: avatar,
|
|
name: data["name"],
|
|
follower_address: data["followers"],
|
|
bio: data["summary"]
|
|
}
|
|
|
|
# nickname can be nil because of virtual actors
|
|
user_data =
|
|
if data["preferredUsername"] do
|
|
Map.put(
|
|
user_data,
|
|
:nickname,
|
|
"#{data["preferredUsername"]}@#{URI.parse(data["id"]).host}"
|
|
)
|
|
else
|
|
Map.put(user_data, :nickname, nil)
|
|
end
|
|
|
|
{:ok, user_data}
|
|
end
|
|
|
|
def fetch_and_prepare_user_from_ap_id(ap_id) do
|
|
with {:ok, data} <- fetch_and_contain_remote_object_from_id(ap_id) do
|
|
user_data_from_user_object(data)
|
|
else
|
|
e -> Logger.error("Could not decode user at fetch #{ap_id}, #{inspect(e)}")
|
|
end
|
|
end
|
|
|
|
def make_user_from_ap_id(ap_id) do
|
|
if _user = User.get_by_ap_id(ap_id) do
|
|
Transmogrifier.upgrade_user_from_ap_id(ap_id)
|
|
else
|
|
with {:ok, data} <- fetch_and_prepare_user_from_ap_id(ap_id) do
|
|
User.insert_or_update_user(data)
|
|
else
|
|
e -> {:error, e}
|
|
end
|
|
end
|
|
end
|
|
|
|
def make_user_from_nickname(nickname) do
|
|
with {:ok, %{"ap_id" => ap_id}} when not is_nil(ap_id) <- WebFinger.finger(nickname) do
|
|
make_user_from_ap_id(ap_id)
|
|
else
|
|
_e -> {:error, "No AP id in WebFinger"}
|
|
end
|
|
end
|
|
|
|
def should_federate?(inbox, public) do
|
|
if public do
|
|
true
|
|
else
|
|
inbox_info = URI.parse(inbox)
|
|
!Enum.member?(Pleroma.Config.get([:instance, :quarantined_instances], []), inbox_info.host)
|
|
end
|
|
end
|
|
|
|
def publish(actor, activity) do
|
|
followers =
|
|
if actor.follower_address in activity.recipients do
|
|
{:ok, followers} = User.get_followers(actor)
|
|
followers |> Enum.filter(&(!&1.local))
|
|
else
|
|
[]
|
|
end
|
|
|
|
public = is_public?(activity)
|
|
|
|
remote_inboxes =
|
|
(Pleroma.Web.Salmon.remote_users(activity) ++ followers)
|
|
|> Enum.filter(fn user -> User.ap_enabled?(user) end)
|
|
|> Enum.map(fn %{info: %{source_data: data}} ->
|
|
(is_map(data["endpoints"]) && Map.get(data["endpoints"], "sharedInbox")) || data["inbox"]
|
|
end)
|
|
|> Enum.uniq()
|
|
|> Enum.filter(fn inbox -> should_federate?(inbox, public) end)
|
|
|
|
{:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
|
|
json = Jason.encode!(data)
|
|
|
|
Enum.each(remote_inboxes, fn inbox ->
|
|
Federator.enqueue(:publish_single_ap, %{
|
|
inbox: inbox,
|
|
json: json,
|
|
actor: actor,
|
|
id: activity.data["id"]
|
|
})
|
|
end)
|
|
end
|
|
|
|
def publish_one(%{inbox: inbox, json: json, actor: actor, id: id}) do
|
|
Logger.info("Federating #{id} to #{inbox}")
|
|
host = URI.parse(inbox).host
|
|
|
|
digest = "SHA-256=" <> (:crypto.hash(:sha256, json) |> Base.encode64())
|
|
|
|
signature =
|
|
Pleroma.Web.HTTPSignatures.sign(actor, %{
|
|
host: host,
|
|
"content-length": byte_size(json),
|
|
digest: digest
|
|
})
|
|
|
|
@httpoison.post(
|
|
inbox,
|
|
json,
|
|
[
|
|
{"Content-Type", "application/activity+json"},
|
|
{"signature", signature},
|
|
{"digest", digest}
|
|
]
|
|
)
|
|
end
|
|
|
|
# TODO:
|
|
# This will create a Create activity, which we need internally at the moment.
|
|
def fetch_object_from_id(id) do
|
|
if object = Object.get_cached_by_ap_id(id) do
|
|
{:ok, object}
|
|
else
|
|
Logger.info("Fetching #{id} via AP")
|
|
|
|
with {:ok, data} <- fetch_and_contain_remote_object_from_id(id),
|
|
nil <- Object.normalize(data),
|
|
params <- %{
|
|
"type" => "Create",
|
|
"to" => data["to"],
|
|
"cc" => data["cc"],
|
|
"actor" => data["actor"] || data["attributedTo"],
|
|
"object" => data
|
|
},
|
|
:ok <- Transmogrifier.contain_origin(id, params),
|
|
{:ok, activity} <- Transmogrifier.handle_incoming(params) do
|
|
{:ok, Object.normalize(activity.data["object"])}
|
|
else
|
|
{:error, {:reject, nil}} ->
|
|
{:reject, nil}
|
|
|
|
object = %Object{} ->
|
|
{:ok, object}
|
|
|
|
_e ->
|
|
Logger.info("Couldn't get object via AP, trying out OStatus fetching...")
|
|
|
|
case OStatus.fetch_activity_from_url(id) do
|
|
{:ok, [activity | _]} -> {:ok, Object.normalize(activity.data["object"])}
|
|
e -> e
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
def fetch_and_contain_remote_object_from_id(id) do
|
|
Logger.info("Fetching #{id} via AP")
|
|
|
|
with true <- String.starts_with?(id, "http"),
|
|
{:ok, %{body: body, status: code}} when code in 200..299 <-
|
|
@httpoison.get(
|
|
id,
|
|
[{:Accept, "application/activity+json"}]
|
|
),
|
|
{:ok, data} <- Jason.decode(body),
|
|
:ok <- Transmogrifier.contain_origin_from_id(id, data) do
|
|
{:ok, data}
|
|
else
|
|
e ->
|
|
{:error, e}
|
|
end
|
|
end
|
|
|
|
def is_public?(%Object{data: %{"type" => "Tombstone"}}), do: false
|
|
def is_public?(%Activity{data: data}), do: is_public?(data)
|
|
|
|
def is_public?(data) do
|
|
"https://www.w3.org/ns/activitystreams#Public" in (data["to"] ++ (data["cc"] || []))
|
|
end
|
|
|
|
def visible_for_user?(activity, nil) do
|
|
is_public?(activity)
|
|
end
|
|
|
|
def visible_for_user?(activity, user) do
|
|
x = [user.ap_id | user.following]
|
|
y = activity.data["to"] ++ (activity.data["cc"] || [])
|
|
visible_for_user?(activity, nil) || Enum.any?(x, &(&1 in y))
|
|
end
|
|
|
|
# guard
|
|
def entire_thread_visible_for_user?(nil, _user), do: false
|
|
|
|
# child
|
|
def entire_thread_visible_for_user?(
|
|
%Activity{data: %{"object" => %{"inReplyTo" => parent_id}}} = tail,
|
|
user
|
|
)
|
|
when is_binary(parent_id) do
|
|
parent = Activity.get_in_reply_to_activity(tail)
|
|
visible_for_user?(tail, user) && entire_thread_visible_for_user?(parent, user)
|
|
end
|
|
|
|
# root
|
|
def entire_thread_visible_for_user?(tail, user), do: visible_for_user?(tail, user)
|
|
|
|
# filter out broken threads
|
|
def contain_broken_threads(%Activity{} = activity, %User{} = user) do
|
|
entire_thread_visible_for_user?(activity, user)
|
|
end
|
|
|
|
# do post-processing on a specific activity
|
|
def contain_activity(%Activity{} = activity, %User{} = user) do
|
|
contain_broken_threads(activity, user)
|
|
end
|
|
|
|
# do post-processing on a timeline
|
|
def contain_timeline(timeline, user) do
|
|
timeline
|
|
|> Enum.filter(fn activity ->
|
|
contain_activity(activity, user)
|
|
end)
|
|
end
|
|
end
|