Fix mentioning complex usernames

The updated linkify is much more liberal about usernames in mentions.

Fixes: #1011

mix.exs

@@ -161,7 +161,7 @@ defmodule Pleroma.Mixfile do
       {:floki, "~> 0.34"},
       {:timex, "~> 3.7"},
       {:ueberauth, "~> 0.10.7"},
-      {:linkify, "~> 0.5.3"},
+      {:linkify, git: "https://akkoma.dev/AkkomaGang/linkify.git", branch: "main"},
       {:http_signatures,
        git: "https://akkoma.dev/AkkomaGang/http_signatures.git", branch: "main"},
       {:telemetry, "~> 1.2"},

mix.lock

@@ -69,7 +69,7 @@
   "joken": {:hex, :joken, "2.6.2", "5daaf82259ca603af4f0b065475099ada1b2b849ff140ccd37f4b6828ca6892a", [:mix], [{:jose, "~> 1.11.10", [hex: :jose, repo: "hexpm", optional: false]}], "hexpm", "5134b5b0a6e37494e46dbf9e4dad53808e5e787904b7c73972651b51cce3d72b"},
   "jose": {:hex, :jose, "1.11.10", "a903f5227417bd2a08c8a00a0cbcc458118be84480955e8d251297a425723f83", [:mix, :rebar3], [], "hexpm", "0d6cd36ff8ba174db29148fc112b5842186b68a90ce9fc2b3ec3afe76593e614"},
   "jumper": {:hex, :jumper, "1.0.2", "68cdcd84472a00ac596b4e6459a41b3062d4427cbd4f1e8c8793c5b54f1406a7", [:mix], [], "hexpm", "9b7782409021e01ab3c08270e26f36eb62976a38c1aa64b2eaf6348422f165e1"},
-  "linkify": {:hex, :linkify, "0.5.3", "5f8143d8f61f5ff08d3aeeff47ef6509492b4948d8f08007fbf66e4d2246a7f2", [:mix], [], "hexpm", "3ef35a1377d47c25506e07c1c005ea9d38d700699d92ee92825f024434258177"},
+  "linkify": {:git, "https://akkoma.dev/AkkomaGang/linkify.git", "b8399ccd74849b70609fe92eea96654c1c36aa6d", [branch: "main"]},
   "mail": {:hex, :mail, "0.5.1", "6383a61620aea24675c96e34b9019dede1bfc9a37ee10ce5a5cafcc7c5e48743", [:mix], [], "hexpm", "595144340b74f23d651ea2b4a72a896819940478d7425dfa302ea3b5c9041ec9"},
   "majic": {:git, "https://akkoma.dev/AkkomaGang/majic.git", "80540b36939ec83f48e76c61e5000e0fd67706f0", [branch: "main"]},
   "makeup": {:hex, :makeup, "1.2.1", "e90ac1c65589ef354378def3ba19d401e739ee7ee06fb47f94c687016e3713d1", [:mix], [{:nimble_parsec, "~> 1.4", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "d36484867b0bae0fea568d10131197a4c2e47056a6fbe84922bf6ba71c8d17ce"},

test/pleroma/web/common_api/activity_draft_test.exs

@@ -0,0 +1,39 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.CommonAPI.ActivityDraftTest do
+  alias Pleroma.Web.CommonAPI.ActivityDraft
+
+  use Pleroma.DataCase
+
+  import Pleroma.Factory
+
+  setup do
+    user = insert(:user, local: true)
+
+    %{user: user}
+  end
+
+  defp test_dm_addressing(from, to) do
+    {:ok, draft} =
+      ActivityDraft.create(from, %{
+        status: "@#{to.nickname} hi",
+        visibility: "direct"
+      })
+
+    assert to.ap_id in draft.mentions
+  end
+
+  describe "addresses mentioned user" do
+    test "when no dot in name", %{user: user} do
+      addr = insert(:user, local: false, nickname: "nix@example.org")
+      test_dm_addressing(user, addr)
+    end
+
+    test "when dot in name", %{user: user} do
+      addr = insert(:user, local: false, nickname: "ly.nx@example.org")
+      test_dm_addressing(user, addr)
+    end
+  end
+end