+++ /dev/null
-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.Web.Streamer do
- use GenServer
- require Logger
- alias Pleroma.Activity
- alias Pleroma.Notification
- alias Pleroma.Object
- alias Pleroma.User
- alias Pleroma.Web.ActivityPub.ActivityPub
- alias Pleroma.Web.ActivityPub.Visibility
- alias Pleroma.Web.MastodonAPI.NotificationView
-
- @keepalive_interval :timer.seconds(30)
-
- def start_link do
- GenServer.start_link(__MODULE__, %{}, name: __MODULE__)
- end
-
- def add_socket(topic, socket) do
- GenServer.cast(__MODULE__, %{action: :add, socket: socket, topic: topic})
- end
-
- def remove_socket(topic, socket) do
- GenServer.cast(__MODULE__, %{action: :remove, socket: socket, topic: topic})
- end
-
- def stream(topic, item) do
- GenServer.cast(__MODULE__, %{action: :stream, topic: topic, item: item})
- end
-
- def init(args) do
- spawn(fn ->
- # 30 seconds
- Process.sleep(@keepalive_interval)
- GenServer.cast(__MODULE__, %{action: :ping})
- end)
-
- {:ok, args}
- end
-
- def handle_cast(%{action: :ping}, topics) do
- Map.values(topics)
- |> List.flatten()
- |> Enum.each(fn socket ->
- Logger.debug("Sending keepalive ping")
- send(socket.transport_pid, {:text, ""})
- end)
-
- spawn(fn ->
- # 30 seconds
- Process.sleep(@keepalive_interval)
- GenServer.cast(__MODULE__, %{action: :ping})
- end)
-
- {:noreply, topics}
- end
-
- def handle_cast(%{action: :stream, topic: "direct", item: item}, topics) do
- recipient_topics =
- User.get_recipients_from_activity(item)
- |> Enum.map(fn %{id: id} -> "direct:#{id}" end)
-
- Enum.each(recipient_topics || [], fn user_topic ->
- Logger.debug("Trying to push direct message to #{user_topic}\n\n")
- push_to_socket(topics, user_topic, item)
- end)
-
- {:noreply, topics}
- end
-
- def handle_cast(%{action: :stream, topic: "list", item: item}, topics) do
- # filter the recipient list if the activity is not public, see #270.
- recipient_lists =
- case Visibility.is_public?(item) do
- true ->
- Pleroma.List.get_lists_from_activity(item)
-
- _ ->
- Pleroma.List.get_lists_from_activity(item)
- |> Enum.filter(fn list ->
- owner = User.get_by_id(list.user_id)
-
- Visibility.visible_for_user?(item, owner)
- end)
- end
-
- recipient_topics =
- recipient_lists
- |> Enum.map(fn %{id: id} -> "list:#{id}" end)
-
- Enum.each(recipient_topics || [], fn list_topic ->
- Logger.debug("Trying to push message to #{list_topic}\n\n")
- push_to_socket(topics, list_topic, item)
- end)
-
- {:noreply, topics}
- end
-
- def handle_cast(%{action: :stream, topic: "user", item: %Notification{} = item}, topics) do
- topic = "user:#{item.user_id}"
-
- Enum.each(topics[topic] || [], fn socket ->
- json =
- %{
- event: "notification",
- payload:
- NotificationView.render("show.json", %{
- notification: item,
- for: socket.assigns["user"]
- })
- |> Jason.encode!()
- }
- |> Jason.encode!()
-
- send(socket.transport_pid, {:text, json})
- end)
-
- {:noreply, topics}
- end
-
- def handle_cast(%{action: :stream, topic: "user", item: item}, topics) do
- Logger.debug("Trying to push to users")
-
- recipient_topics =
- User.get_recipients_from_activity(item)
- |> Enum.map(fn %{id: id} -> "user:#{id}" end)
-
- Enum.each(recipient_topics, fn topic ->
- push_to_socket(topics, topic, item)
- end)
-
- {:noreply, topics}
- end
-
- def handle_cast(%{action: :stream, topic: topic, item: item}, topics) do
- Logger.debug("Trying to push to #{topic}")
- Logger.debug("Pushing item to #{topic}")
- push_to_socket(topics, topic, item)
- {:noreply, topics}
- end
-
- def handle_cast(%{action: :add, topic: topic, socket: socket}, sockets) do
- topic = internal_topic(topic, socket)
- sockets_for_topic = sockets[topic] || []
- sockets_for_topic = Enum.uniq([socket | sockets_for_topic])
- sockets = Map.put(sockets, topic, sockets_for_topic)
- Logger.debug("Got new conn for #{topic}")
- {:noreply, sockets}
- end
-
- def handle_cast(%{action: :remove, topic: topic, socket: socket}, sockets) do
- topic = internal_topic(topic, socket)
- sockets_for_topic = sockets[topic] || []
- sockets_for_topic = List.delete(sockets_for_topic, socket)
- sockets = Map.put(sockets, topic, sockets_for_topic)
- Logger.debug("Removed conn for #{topic}")
- {:noreply, sockets}
- end
-
- def handle_cast(m, state) do
- Logger.info("Unknown: #{inspect(m)}, #{inspect(state)}")
- {:noreply, state}
- end
-
- defp represent_update(%Activity{} = activity, %User{} = user) do
- %{
- event: "update",
- payload:
- Pleroma.Web.MastodonAPI.StatusView.render(
- "status.json",
- activity: activity,
- for: user
- )
- |> Jason.encode!()
- }
- |> Jason.encode!()
- end
-
- defp represent_update(%Activity{} = activity) do
- %{
- event: "update",
- payload:
- Pleroma.Web.MastodonAPI.StatusView.render(
- "status.json",
- activity: activity
- )
- |> Jason.encode!()
- }
- |> Jason.encode!()
- end
-
- def push_to_socket(topics, topic, %Activity{data: %{"type" => "Announce"}} = item) do
- Enum.each(topics[topic] || [], fn socket ->
- # Get the current user so we have up-to-date blocks etc.
- if socket.assigns[:user] do
- user = User.get_cached_by_ap_id(socket.assigns[:user].ap_id)
- blocks = user.info.blocks || []
- mutes = user.info.mutes || []
- reblog_mutes = user.info.muted_reblogs || []
-
- parent = Object.normalize(item)
-
- unless is_nil(parent) or item.actor in blocks or item.actor in mutes or
- item.actor in reblog_mutes or not ActivityPub.contain_activity(item, user) or
- parent.data["actor"] in blocks or parent.data["actor"] in mutes do
- send(socket.transport_pid, {:text, represent_update(item, user)})
- end
- else
- send(socket.transport_pid, {:text, represent_update(item)})
- end
- end)
- end
-
- def push_to_socket(topics, topic, %Activity{
- data: %{"type" => "Delete", "deleted_activity_id" => deleted_activity_id}
- }) do
- Enum.each(topics[topic] || [], fn socket ->
- send(
- socket.transport_pid,
- {:text, %{event: "delete", payload: to_string(deleted_activity_id)} |> Jason.encode!()}
- )
- end)
- end
-
- def push_to_socket(_topics, _topic, %Activity{data: %{"type" => "Delete"}}), do: :noop
-
- def push_to_socket(topics, topic, item) do
- Enum.each(topics[topic] || [], fn socket ->
- # Get the current user so we have up-to-date blocks etc.
- if socket.assigns[:user] do
- user = User.get_cached_by_ap_id(socket.assigns[:user].ap_id)
- blocks = user.info.blocks || []
- mutes = user.info.mutes || []
-
- unless item.actor in blocks or item.actor in mutes or
- not ActivityPub.contain_activity(item, user) do
- send(socket.transport_pid, {:text, represent_update(item, user)})
- end
- else
- send(socket.transport_pid, {:text, represent_update(item)})
- end
- end)
- end
-
- defp internal_topic(topic, socket) when topic in ~w[user direct] do
- "#{topic}:#{socket.assigns[:user].id}"
- end
-
- defp internal_topic(topic, _), do: topic
-end
projects / akkoma / blobdiff