Merge pull request 'Exclude deactivated users from emoji reaction lists' (#592) from active-emoji-reactions into develop

Reviewed-on: https://akkoma.dev/AkkomaGang/akkoma/pulls/592

CHANGELOG.md

@@ -6,10 +6,17 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## Unreleased
 
+## Added
+
 - Added a new configuration option to the MediaProxy feature that allows the blocking of specific domains from using the media proxy or being explicitly allowed by the Content-Security-Policy.
   - Please make sure instances you wanted to block media from are not in the MediaProxy `whitelist`, and instead use `blocklist`.
 - `OnlyMedia` Upload Filter to simplify restricting uploads to audio, image, and video types
 
+## Fixed
+
+- Deactivated users can no longer show up in the emoji reaction list
+- Embedded posts can no longer bypass `:restrict\_unauthenticated`
+
 ## 2023.05
 
 ## Added

lib/pleroma/web/embed_controller.ex

@@ -11,22 +11,31 @@ defmodule Pleroma.Web.EmbedController do
 
   alias Pleroma.Web.ActivityPub.Visibility
 
-  plug(:put_layout, :embed)
-
   def show(conn, %{"id" => id}) do
-    with %Activity{local: true} = activity <-
-           Activity.get_by_id_with_object(id),
-         true <- Visibility.is_public?(activity.object) do
+    with {:activity, %Activity{} = activity} <-
+           {:activity, Activity.get_by_id_with_object(id)},
+         {:local, true} <- {:local, activity.local},
+         {:visible, true} <- {:visible, Visibility.visible_for_user?(activity, nil)} do
       {:ok, author} = User.get_or_fetch(activity.object.data["actor"])
 
       conn
       |> delete_resp_header("x-frame-options")
       |> delete_resp_header("content-security-policy")
+      |> put_view(Pleroma.Web.EmbedView)
       |> render("show.html",
         activity: activity,
         author: User.sanitize_html(author),
         counts: get_counts(activity)
       )
+    else
+      {:activity, _} ->
+        render_error(conn, :not_found, "Post not found")
+
+      {:local, false} ->
+        render_error(conn, :unauthorized, "Federated posts cannot be embedded")
+
+      {:visible, false} ->
+        render_error(conn, :unauthorized, "Not authorized to view this post")
     end
   end
 

lib/pleroma/web/media_proxy.ex

@@ -84,8 +84,13 @@ defmodule Pleroma.Web.MediaProxy do
   end
 
   def blocked?(url) do
-    %{host: domain} = URI.parse(url)
-    domain in Config.get([:media_proxy, :whitelist])
+    %{scheme: scheme, host: domain} = URI.parse(url)
+    # Block either the bare domain or the scheme-domain combo
+    scheme_domain = "#{scheme}://#{domain}"
+    blocklist = Config.get([:media_proxy, :blocklist])
+
+    Enum.member?(blocklist, domain) ||
+      Enum.member?(blocklist, scheme_domain)
   end
 
   defp maybe_get_domain_from_url("http" <> _ = url) do

lib/pleroma/web/pleroma_api/controllers/emoji_reaction_controller.ex

@@ -41,6 +41,17 @@ defmodule Pleroma.Web.PleromaAPI.EmojiReactionController do
     end
   end
 
+  defp filter_allowed_user_by_ap_id(ap_ids, excluded_ap_ids) do
+    Enum.reject(ap_ids, fn ap_id ->
+      with false <- ap_id in excluded_ap_ids,
+           %{is_active: true} <- User.get_cached_by_ap_id(ap_id) do
+        false
+      else
+        _ -> true
+      end
+    end)
+  end
+
   def filter_allowed_users(reactions, user, with_muted) do
     exclude_ap_ids =
       if is_nil(user) do
@@ -51,7 +62,7 @@ defmodule Pleroma.Web.PleromaAPI.EmojiReactionController do
       end
 
     filter_emoji = fn emoji, users, url ->
-      case Enum.reject(users, &(&1 in exclude_ap_ids)) do
+      case filter_allowed_user_by_ap_id(users, exclude_ap_ids) do
         [] -> nil
         users -> {emoji, users, url}
       end

lib/pleroma/web/views/embed_view.ex

@@ -15,7 +15,7 @@ defmodule Pleroma.Web.EmbedView do
   alias Pleroma.Web.Metadata.Utils
   alias Pleroma.Web.Router.Helpers
 
-  use Phoenix.HTML
+  import Phoenix.HTML
 
   defdelegate full_nickname(user), to: User
 
@@ -55,10 +55,13 @@ defmodule Pleroma.Web.EmbedView do
     data["url"] || data["external_url"] || data["id"]
   end
 
-  defp attachments(%Activity{object: %Object{data: %{"attachment" => attachments}}}) do
+  defp attachments(%Activity{object: %Object{data: %{"attachment" => attachments}}})
+       when is_list(attachments) do
     attachments
   end
 
+  defp attachments(_), do: []
+
   defp sensitive?(%Activity{object: %Object{data: %{"sensitive" => sensitive}}}) do
     sensitive
   end

test/pleroma/web/embed_controller_test.exs

@@ -0,0 +1,44 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.EmbedControllerTest do
+  use Pleroma.Web.ConnCase, async: true
+  import Pleroma.Factory
+
+  test "/embed", %{conn: conn} do
+    activity = insert(:note_activity)
+
+    resp =
+      conn
+      |> get("/embed/#{activity.id}")
+      |> response(200)
+
+    object = Pleroma.Object.get_by_ap_id(activity.data["object"])
+
+    assert String.contains?(resp, object.data["content"])
+  end
+
+  test "/embed with a restricted post", %{conn: conn} do
+    activity = insert(:note_activity)
+    clear_config([:restrict_unauthenticated, :activities, :local], true)
+
+    conn
+    |> get("/embed/#{activity.id}")
+    |> response(401)
+  end
+
+  test "/embed with a private post", %{conn: conn} do
+    user = insert(:user)
+
+    {:ok, activity} =
+      Pleroma.Web.CommonAPI.post(user, %{
+        status: "Mega ultra chicken status: #fried",
+        visibility: "private"
+      })
+
+    conn
+    |> get("/embed/#{activity.id}")
+    |> response(401)
+  end
+end

test/pleroma/web/mastodon_api/controllers/status_controller_test.exs

@@ -1960,6 +1960,10 @@ defmodule Pleroma.Web.MastodonAPI.StatusControllerTest do
       {:ok, _} = CommonAPI.react_with_emoji(activity.id, other_user, "🎅")
       User.mute(user, other_user)
 
+      deactivated_user = insert(:user)
+      {:ok, _} = CommonAPI.react_with_emoji(activity.id, deactivated_user, "🎅")
+      User.set_activation(deactivated_user, false)
+
       result =
         conn
         |> get("/api/v1/statuses/?ids[]=#{activity.id}")
@@ -1967,6 +1971,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusControllerTest do
 
       assert [
                %{
+                 "emoji_reactions" => [],
                  "pleroma" => %{
                    "emoji_reactions" => []
                  }