1 files changed, 51 insertions, 9 deletions

diff --git a/lib/pleroma/activity.ex b/lib/pleroma/activity.ex
index 72e2256ea..6213d0eb7 100644
--- a/lib/pleroma/activity.ex
+++ b/lib/pleroma/activity.ex
@@ -1,5 +1,5 @@
 # Pleroma: A lightweight social networking server
-# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Activity do
@@ -27,17 +27,13 @@ defmodule Pleroma.Activity do
   # https://github.com/tootsuite/mastodon/blob/master/app/models/notification.rb#L19
   @mastodon_notification_types %{
     "Create" => "mention",
-    "Follow" => "follow",
+    "Follow" => ["follow", "follow_request"],
     "Announce" => "reblog",
     "Like" => "favourite",
     "Move" => "move",
     "EmojiReact" => "pleroma:emoji_reaction"
   }
 
-  @mastodon_to_ap_notification_types for {k, v} <- @mastodon_notification_types,
-                                         into: %{},
-                                         do: {v, k}
-
   schema "activities" do
     field(:data, :map)
     field(:local, :boolean, default: true)
@@ -95,6 +91,17 @@ defmodule Pleroma.Activity do
     |> preload([activity, object: object], object: object)
   end
 
+  # Note: applies to fake activities (ActivityPub.Utils.get_notified_from_object/1 etc.)
+  def user_actor(%Activity{actor: nil}), do: nil
+
+  def user_actor(%Activity{} = activity) do
+    with %User{} <- activity.user_actor do
+      activity.user_actor
+    else
+      _ -> User.get_cached_by_ap_id(activity.actor)
+    end
+  end
+
   def with_joined_user_actor(query, join_type \\ :inner) do
     join(query, join_type, [activity], u in User,
       on: u.ap_id == activity.actor,
@@ -280,15 +287,43 @@ defmodule Pleroma.Activity do
 
   defp purge_web_resp_cache(nil), do: nil
 
-  for {ap_type, type} <- @mastodon_notification_types do
+  def follow_accepted?(
+        %Activity{data: %{"type" => "Follow", "object" => followed_ap_id}} = activity
+      ) do
+    with %User{} = follower <- Activity.user_actor(activity),
+         %User{} = followed <- User.get_cached_by_ap_id(followed_ap_id) do
+      Pleroma.FollowingRelationship.following?(follower, followed)
+    else
+      _ -> false
+    end
+  end
+
+  def follow_accepted?(_), do: false
+
+  @spec mastodon_notification_type(Activity.t()) :: String.t() | nil
+
+  for {ap_type, type} <- @mastodon_notification_types, not is_list(type) do
     def mastodon_notification_type(%Activity{data: %{"type" => unquote(ap_type)}}),
       do: unquote(type)
   end
 
+  def mastodon_notification_type(%Activity{data: %{"type" => "Follow"}} = activity) do
+    if follow_accepted?(activity) do
+      "follow"
+    else
+      "follow_request"
+    end
+  end
+
   def mastodon_notification_type(%Activity{}), do: nil
 
+  @spec from_mastodon_notification_type(String.t()) :: String.t() | nil
+  @doc "Converts Mastodon notification type to AR activity type"
   def from_mastodon_notification_type(type) do
-    Map.get(@mastodon_to_ap_notification_types, type)
+    with {k, _v} <-
+           Enum.find(@mastodon_notification_types, fn {_k, v} -> type in List.wrap(v) end) do
+      k
+    end
   end
 
   def all_by_actor_and_id(actor, status_ids \\ [])
@@ -308,9 +343,16 @@ defmodule Pleroma.Activity do
     |> where([a], fragment("? ->> 'state' = 'pending'", a.data))
   end
 
+  def following_requests_for_actor(%Pleroma.User{ap_id: ap_id}) do
+    Queries.by_type("Follow")
+    |> where([a], fragment("?->>'state' = 'pending'", a.data))
+    |> where([a], a.actor == ^ap_id)
+    |> Repo.all()
+  end
+
   def restrict_deactivated_users(query) do
     deactivated_users =
-      from(u in User.Query.build(deactivated: true), select: u.ap_id)
+      from(u in User.Query.build(%{deactivated: true}), select: u.ap_id)
       |> Repo.all()
 
     Activity.Queries.exclude_authors(query, deactivated_users)