search: fix 'following' query parameter

The parameter included the accounts that are following you (followers)
instead of those you are actually following.

Co-Authored-By: Haelwenn (lanodan) Monnier <contact@hacktivis.me>

CHANGELOG.md

@@ -3,6 +3,11 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## unreleased-patch - ???
+
+### Fixed
+- Mastodon API: Search parameter `following` now correctly returns the followings rather than the followers
+
 ## [2.1.0] - 2020-08-28
 
 ### Changed

lib/pleroma/user/search.ex

@@ -116,7 +116,7 @@ defp trigram_rank(query, query_string) do
   end
 
   defp base_query(_user, false), do: User
-  defp base_query(user, true), do: User.get_followers_query(user)
+  defp base_query(user, true), do: User.get_friends_query(user)
 
   defp filter_invisible_users(query) do
     from(q in query, where: q.invisible == false)

test/user_search_test.exs

@@ -109,22 +109,22 @@ test "finds users, boosting ranks of friends and followers" do
                Enum.map(User.search("doe", resolve: false, for_user: u1), & &1.id) == []
     end
 
-    test "finds followers of user by partial name" do
-      u1 = insert(:user)
-      u2 = insert(:user, %{name: "Jimi"})
-      follower_jimi = insert(:user, %{name: "Jimi Hendrix"})
-      follower_lizz = insert(:user, %{name: "Lizz Wright"})
-      friend = insert(:user, %{name: "Jimi"})
+    test "finds followings of user by partial name" do
+      lizz = insert(:user, %{name: "Lizz"})
+      jimi = insert(:user, %{name: "Jimi"})
+      following_lizz = insert(:user, %{name: "Jimi Hendrix"})
+      following_jimi = insert(:user, %{name: "Lizz Wright"})
+      follower_lizz = insert(:user, %{name: "Jimi"})
 
-      {:ok, follower_jimi} = User.follow(follower_jimi, u1)
-      {:ok, _follower_lizz} = User.follow(follower_lizz, u2)
-      {:ok, u1} = User.follow(u1, friend)
+      {:ok, lizz} = User.follow(lizz, following_lizz)
+      {:ok, _jimi} = User.follow(jimi, following_jimi)
+      {:ok, _follower_lizz} = User.follow(follower_lizz, lizz)
 
-      assert Enum.map(User.search("jimi", following: true, for_user: u1), & &1.id) == [
-               follower_jimi.id
+      assert Enum.map(User.search("jimi", following: true, for_user: lizz), & &1.id) == [
+               following_lizz.id
              ]
 
-      assert User.search("lizz", following: true, for_user: u1) == []
+      assert User.search("lizz", following: true, for_user: lizz) == []
     end
 
     test "find local and remote users for authenticated users" do