add license boilerplate to pleroma core

[akkoma] / lib / pleroma / web / streamer.ex

diff --git a/lib/pleroma/web/streamer.ex b/lib/pleroma/web/streamer.ex
index 3375af8414acfc742716d1e34955ead8d2f3102c..05f877438dbd103a0238f7962a2eec7578b82615 100644 (file)
--- a/lib/pleroma/web/streamer.ex
+++ b/lib/pleroma/web/streamer.ex
@@ -1,15 +1,16 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2018 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule Pleroma.Web.Streamer do
   use GenServer
   require Logger
-  alias Pleroma.{User, Notification}
+  alias Pleroma.{User, Notification, Activity, Object, Repo}
+  alias Pleroma.Web.ActivityPub.ActivityPub
 
-  def start_link do
-    spawn(fn ->
-      # 30 seconds
-      Process.sleep(1000 * 30)
-      GenServer.cast(__MODULE__, %{action: :ping})
-    end)
+  @keepalive_interval :timer.seconds(30)
 
+  def start_link do
     GenServer.start_link(__MODULE__, %{}, name: __MODULE__)
   end
 
@@ -25,6 +26,16 @@ defmodule Pleroma.Web.Streamer 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()
@@ -35,13 +46,54 @@ defmodule Pleroma.Web.Streamer do
 
     spawn(fn ->
       # 30 seconds
-      Process.sleep(1000 * 30)
+      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 ActivityPub.is_public?(item) do
+        true ->
+          Pleroma.List.get_lists_from_activity(item)
+
+        _ ->
+          Pleroma.List.get_lists_from_activity(item)
+          |> Enum.filter(fn list ->
+            owner = Repo.get(User, list.user_id)
+
+            ActivityPub.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}"
 
@@ -108,33 +160,69 @@ defmodule Pleroma.Web.Streamer do
     {: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 || []
+
+        parent = Object.normalize(item.data["object"])
+
+        unless is_nil(parent) or item.actor in blocks or parent.data["actor"] in blocks 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, item) do
     Enum.each(topics[topic] || [], fn socket ->
       # Get the current user so we have up-to-date blocks etc.
-      user = User.get_cached_by_ap_id(socket.assigns[:user].ap_id)
-      blocks = user.info["blocks"] || []
-
-      unless item.actor in blocks do
-        json =
-          %{
-            event: "update",
-            payload:
-              Pleroma.Web.MastodonAPI.StatusView.render(
-                "status.json",
-                activity: item,
-                for: user
-              )
-              |> Jason.encode!()
-          }
-          |> Jason.encode!()
-
-        send(socket.transport_pid, {:text, json})
+      if socket.assigns[:user] do
+        user = User.get_cached_by_ap_id(socket.assigns[:user].ap_id)
+        blocks = user.info.blocks || []
+
+        unless item.actor in blocks 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("user", socket) do
-    "user:#{socket.assigns[:user].id}"
+  defp internal_topic(topic, socket) when topic in ~w[user direct] do
+    "#{topic}:#{socket.assigns[:user].id}"
   end
 
   defp internal_topic(topic, _), do: topic