From bf91e5659ffd03b15110b6f1094b30aed940e45b Mon Sep 17 00:00:00 2001
From: eal <eal@waifu.club>
Date: Thu, 7 Dec 2017 21:34:25 +0200
Subject: [PATCH 1/2] Fix HTML escape breaking some links.

---
 lib/pleroma/formatter.ex            | 9 +++++++++
 lib/pleroma/web/common_api/utils.ex | 4 ++--
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/lib/pleroma/formatter.ex b/lib/pleroma/formatter.ex
index fbcbca979..275c60f32 100644
--- a/lib/pleroma/formatter.ex
+++ b/lib/pleroma/formatter.ex
@@ -24,6 +24,15 @@ defmodule Pleroma.Formatter do
     |> Enum.filter(fn ({_match, user}) -> user end)
   end
 
+  def html_escape(text) do
+    Regex.split(@link_regex, text, include_captures: true)
+    |> Enum.map_every(2, fn chunk ->
+      {:safe, part} = Phoenix.HTML.html_escape(chunk)
+      part
+    end)
+    |> Enum.join("")
+  end
+
   @finmoji [
     "a_trusted_friend",
     "alandislands",
diff --git a/lib/pleroma/web/common_api/utils.ex b/lib/pleroma/web/common_api/utils.ex
index 1a23b1ad2..f46db4cf0 100644
--- a/lib/pleroma/web/common_api/utils.ex
+++ b/lib/pleroma/web/common_api/utils.ex
@@ -58,8 +58,8 @@ defmodule Pleroma.Web.CommonAPI.Utils do
   end
 
   def format_input(text, mentions, _tags) do
-    Phoenix.HTML.html_escape(text)
-    |> elem(1)
+    text
+    |> Formatter.html_escape
     |> Formatter.linkify
     |> String.replace("\n", "<br>")
     |> add_user_links(mentions)

From a3e68f02330a3c38f1d3f568ad507e5111b82600 Mon Sep 17 00:00:00 2001
From: eal <eal@waifu.club>
Date: Thu, 7 Dec 2017 21:38:31 +0200
Subject: [PATCH 2/2] Allow parentheses in links.

---
 lib/pleroma/formatter.ex |  2 +-
 test/formatter_test.exs  | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/lib/pleroma/formatter.ex b/lib/pleroma/formatter.ex
index 275c60f32..c98db2d94 100644
--- a/lib/pleroma/formatter.ex
+++ b/lib/pleroma/formatter.ex
@@ -1,7 +1,7 @@
 defmodule Pleroma.Formatter do
   alias Pleroma.User
 
-  @link_regex ~r/https?:\/\/[\w\.\/?=\-#%&@~]+[\w\/]/u
+  @link_regex ~r/https?:\/\/[\w\.\/?=\-#%&@~\(\)]+[\w\/]/u
   def linkify(text) do
     Regex.replace(@link_regex, text, "<a href='\\0'>\\0</a>")
   end
diff --git a/test/formatter_test.exs b/test/formatter_test.exs
index f91973881..cb7695e8e 100644
--- a/test/formatter_test.exs
+++ b/test/formatter_test.exs
@@ -25,6 +25,16 @@ defmodule Pleroma.FormatterTest do
       expected = "<a href='http://www.cs.vu.nl/~ast/intel/'>http://www.cs.vu.nl/~ast/intel/</a>"
 
       assert Formatter.linkify(text) == expected
+
+      text = "https://forum.zdoom.org/viewtopic.php?f=44&t=57087"
+      expected = "<a href='https://forum.zdoom.org/viewtopic.php?f=44&t=57087'>https://forum.zdoom.org/viewtopic.php?f=44&t=57087</a>"
+
+      assert Formatter.linkify(text) == expected
+
+      text = "https://en.wikipedia.org/wiki/Sophia_(Gnosticism)#Mythos_of_the_soul"
+      expected = "<a href='https://en.wikipedia.org/wiki/Sophia_(Gnosticism)#Mythos_of_the_soul'>https://en.wikipedia.org/wiki/Sophia_(Gnosticism)#Mythos_of_the_soul</a>"
+
+      assert Formatter.linkify(text) == expected
     end
   end