395 lines
14 KiB
Elixir
395 lines
14 KiB
Elixir
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
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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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def get_recipients(data) do
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(data["to"] || []) ++ (data["cc"] || [])
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end
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def insert(map, local \\ true) when is_map(map) do
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with nil <- Activity.get_by_ap_id(map["id"]),
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map <- lazy_put_activity_defaults(map),
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:ok <- insert_full_object(map) do
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{:ok, activity} = Repo.insert(%Activity{data: map, local: local, actor: map["actor"], recipients: get_recipients(map)})
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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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if activity.data["type"] in ["Create", "Announce"] do
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Pleroma.Web.Streamer.stream("user", activity)
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if Enum.member?(activity.data["to"], "https://www.w3.org/ns/activitystreams#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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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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local = !(params[:local] == false) # only accept false as false value
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published = params[:published]
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with create_data <- make_create_data(%{to: to, actor: actor, published: published, context: context, object: object}, additional),
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{:ok, activity} <- insert(create_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 accept(%{to: to, actor: actor, object: object} = params) do
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local = !(params[:local] == false) # only accept false as false value
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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 update(%{to: to, cc: cc, actor: actor, object: object} = params) do
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local = !(params[:local] == false) # only accept false as false value
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with data <- %{"to" => to, "cc" => cc, "type" => "Update", "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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# TODO: This is weird, maybe we shouldn't check here if we can make the activity.
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def like(%User{ap_id: ap_id} = user, %Object{data: %{"id" => _}} = object, activity_id \\ nil, local \\ true) 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(%User{} = actor, %Object{} = object) do
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with %Activity{} = activity <- get_existing_like(actor.ap_id, object),
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{:ok, _activity} <- Repo.delete(activity),
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{:ok, object} <- remove_like_from_object(activity, object) do
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{:ok, object}
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else _e -> {:ok, object}
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end
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end
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def announce(%User{ap_id: _} = user, %Object{data: %{"id" => _}} = object, activity_id \\ nil, local \\ true) do
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with true <- is_public?(object),
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announce_data <- make_announce_data(user, object, activity_id),
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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 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, local \\ true) do
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with %Activity{} = follow_activity <- fetch_latest_follow(follower, followed),
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unfollow_data <- make_unfollow_data(follower, followed, follow_activity),
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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 Repo.delete(object),
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Repo.delete_all(Activity.all_non_create_by_object_ap_id_q(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 fetch_activities_for_context(context, opts \\ %{}) do
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public = ["https://www.w3.org/ns/activitystreams#Public"]
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recipients = 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 = query
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|> restrict_blocked(opts)
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|> restrict_recipients(recipients, opts["user"])
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query = from activity in query,
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where: fragment("?->>'type' = ? and ?->>'context' = ?", activity.data, "Create", activity.data, ^context),
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order_by: [desc: :id]
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Repo.all(query)
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end
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# TODO: Make this work properly with unlisted.
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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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|> Repo.all
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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 activity in query,
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where: fragment("? <@ (? #> '{\"object\",\"tag\"}')", ^tag, activity.data)
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end
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defp restrict_tag(query, _), do: query
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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,
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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 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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end
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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,
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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,
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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 activity in query,
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where: fragment("? <@ (? #> '{\"object\",\"likes\"}')", ^ap_id, activity.data)
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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 activity in query,
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where: fragment("not (? #> '{\"object\",\"attachment\"}' = ?)", activity.data, ^[])
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end
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defp restrict_media(query, _), do: query
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# Only search through last 100_000 activities by default
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defp restrict_recent(query, %{"whole_db" => true}), do: query
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defp restrict_recent(query, _) do
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since = (Repo.aggregate(Activity, :max, :id) || 0) - 100_000
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from activity in query,
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where: activity.id > ^since
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end
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defp restrict_blocked(query, %{"blocking_user" => %User{info: info}}) do
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blocks = info["blocks"] || []
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from activity in query,
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where: fragment("not (? = ANY(?))", activity.actor, ^blocks)
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end
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defp restrict_blocked(query, _), do: query
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def fetch_activities_query(recipients, opts \\ %{}) do
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base_query = from activity in Activity,
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limit: 20,
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order_by: [fragment("? desc nulls last", activity.id)]
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base_query
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|> restrict_recipients(recipients, opts["user"])
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|> restrict_tag(opts)
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|> restrict_since(opts)
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|> restrict_local(opts)
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|> restrict_max(opts)
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|> restrict_actor(opts)
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|> restrict_type(opts)
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|> restrict_favorited_by(opts)
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|> restrict_recent(opts)
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|> restrict_blocked(opts)
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|> restrict_media(opts)
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end
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def fetch_activities(recipients, opts \\ %{}) do
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fetch_activities_query(recipients, opts)
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|> Repo.all
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|> Enum.reverse
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end
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def upload(file) do
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data = Upload.store(file)
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Repo.insert(%Object{data: data})
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end
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def user_data_from_user_object(data) do
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avatar = data["icon"]["url"] && %{
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"type" => "Image",
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"url" => [%{"href" => data["icon"]["url"]}]
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}
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banner = data["image"]["url"] && %{
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"type" => "Image",
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"url" => [%{"href" => data["image"]["url"]}]
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}
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user_data = %{
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ap_id: data["id"],
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info: %{
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"ap_enabled" => true,
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"source_data" => data,
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"banner" => banner
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},
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avatar: avatar,
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nickname: "#{data["preferredUsername"]}@#{URI.parse(data["id"]).host}",
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name: data["name"],
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follower_address: data["followers"],
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bio: data["summary"]
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}
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{:ok, user_data}
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end
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def fetch_and_prepare_user_from_ap_id(ap_id) do
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with {:ok, %{status_code: 200, body: body}} <- @httpoison.get(ap_id, ["Accept": "application/activity+json"]),
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{:ok, data} <- Poison.decode(body) do
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user_data_from_user_object(data)
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else
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e -> Logger.error("Could not user at fetch #{ap_id}, #{inspect(e)}")
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end
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end
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def make_user_from_ap_id(ap_id) do
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if user = User.get_by_ap_id(ap_id) do
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Transmogrifier.upgrade_user_from_ap_id(ap_id)
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else
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with {:ok, data} <- fetch_and_prepare_user_from_ap_id(ap_id) do
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User.insert_or_update_user(data)
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else
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e -> {:error, e}
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end
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end
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end
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def make_user_from_nickname(nickname) do
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with {:ok, %{"ap_id" => ap_id}} when not is_nil(ap_id) <- WebFinger.finger(nickname) do
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make_user_from_ap_id(ap_id)
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else
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_e -> {:error, "No ap id in webfinger"}
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end
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end
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def publish(actor, activity) do
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followers = if actor.follower_address in activity.recipients do
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{:ok, followers} = User.get_followers(actor)
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followers |> Enum.filter(&(!&1.local))
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else
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[]
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end
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remote_inboxes = (Pleroma.Web.Salmon.remote_users(activity) ++ followers)
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|> Enum.filter(fn (user) -> User.ap_enabled?(user) end)
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|> Enum.map(fn (%{info: %{"source_data" => data}}) ->
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(data["endpoints"] && data["endpoints"]["sharedInbox"]) || data["inbox"]
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end)
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|> Enum.uniq
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{:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
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json = Poison.encode!(data)
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Enum.each remote_inboxes, fn(inbox) ->
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Federator.enqueue(:publish_single_ap, %{inbox: inbox, json: json, actor: actor, id: activity.data["id"]})
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end
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end
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def publish_one(%{inbox: inbox, json: json, actor: actor, id: id}) do
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Logger.info("Federating #{id} to #{inbox}")
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host = URI.parse(inbox).host
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signature = Pleroma.Web.HTTPSignatures.sign(actor, %{host: host, "content-length": byte_size(json)})
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@httpoison.post(inbox, json, [{"Content-Type", "application/activity+json"}, {"signature", signature}])
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end
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# TODO:
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# This will create a Create activity, which we need internally at the moment.
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def fetch_object_from_id(id) do
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if object = Object.get_cached_by_ap_id(id) do
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{:ok, object}
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else
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Logger.info("Fetching #{id} via AP")
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with {:ok, %{body: body, status_code: code}} when code in 200..299 <- @httpoison.get(id, [Accept: "application/activity+json"], follow_redirect: true, timeout: 10000, recv_timeout: 20000),
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{:ok, data} <- Poison.decode(body),
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nil <- Object.get_by_ap_id(data["id"]),
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params <- %{"type" => "Create", "to" => data["to"], "cc" => data["cc"], "actor" => data["attributedTo"], "object" => data},
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{:ok, activity} <- Transmogrifier.handle_incoming(params) do
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{:ok, Object.get_by_ap_id(activity.data["object"]["id"])}
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else
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object = %Object{} -> {:ok, object}
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e ->
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Logger.info("Couldn't get object via AP, trying out OStatus fetching...")
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case OStatus.fetch_activity_from_url(id) do
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{:ok, [activity | _]} -> {:ok, Object.get_by_ap_id(activity.data["object"]["id"])}
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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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end
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def is_public?(activity) do
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"https://www.w3.org/ns/activitystreams#Public" in (activity.data["to"] ++ (activity.data["cc"] || []))
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end
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def visible_for_user?(activity, nil) do
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is_public?(activity)
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end
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def visible_for_user?(activity, user) do
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x = [user.ap_id | user.following]
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y = (activity.data["to"] ++ (activity.data["cc"] || []))
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visible_for_user?(activity, nil) || Enum.any?(x, &(&1 in y))
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end
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end
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