From f4447d82b814e4710a0d7499bc0707773ac1e440 Mon Sep 17 00:00:00 2001
From: Alex S <alex.strizhakov@gmail.com>
Date: Thu, 11 Jul 2019 16:04:42 +0300
Subject: [PATCH 1/2] parsers configurable

---
 config/config.exs                    |  7 ++++++-
 lib/pleroma/web/rich_media/parser.ex | 12 +++++-------
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/config/config.exs b/config/config.exs
index 2ffa8c621..7d539f994 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -339,7 +339,12 @@
 config :pleroma, :rich_media,
   enabled: true,
   ignore_hosts: [],
-  ignore_tld: ["local", "localdomain", "lan"]
+  ignore_tld: ["local", "localdomain", "lan"],
+  parsers: [
+    Pleroma.Web.RichMedia.Parsers.TwitterCard,
+    Pleroma.Web.RichMedia.Parsers.OGP,
+    Pleroma.Web.RichMedia.Parsers.OEmbed
+  ]
 
 config :pleroma, :media_proxy,
   enabled: false,
diff --git a/lib/pleroma/web/rich_media/parser.ex b/lib/pleroma/web/rich_media/parser.ex
index 21cd47890..0d2523338 100644
--- a/lib/pleroma/web/rich_media/parser.ex
+++ b/lib/pleroma/web/rich_media/parser.ex
@@ -3,12 +3,6 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.RichMedia.Parser do
-  @parsers [
-    Pleroma.Web.RichMedia.Parsers.OGP,
-    Pleroma.Web.RichMedia.Parsers.TwitterCard,
-    Pleroma.Web.RichMedia.Parsers.OEmbed
-  ]
-
   @hackney_options [
     pool: :media,
     recv_timeout: 2_000,
@@ -16,6 +10,10 @@ defmodule Pleroma.Web.RichMedia.Parser do
     with_body: true
   ]
 
+  defp parsers do
+    Pleroma.Config.get([:rich_media, :parsers])
+  end
+
   def parse(nil), do: {:error, "No URL provided"}
 
   if Pleroma.Config.get(:env) == :test do
@@ -48,7 +46,7 @@ defp parse_url(url) do
   end
 
   defp maybe_parse(html) do
-    Enum.reduce_while(@parsers, %{}, fn parser, acc ->
+    Enum.reduce_while(parsers(), %{}, fn parser, acc ->
       case parser.parse(html, acc) do
         {:ok, data} -> {:halt, data}
         {:error, _msg} -> {:cont, acc}

From 7af27c143d6c6f288be1e7d2fd2e2e9a439ececf Mon Sep 17 00:00:00 2001
From: Alex S <alex.strizhakov@gmail.com>
Date: Sun, 14 Jul 2019 09:20:54 +0300
Subject: [PATCH 2/2] changelog & docs

---
 CHANGELOG.md   | 1 +
 docs/config.md | 1 +
 2 files changed, 2 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index bebb438b1..694097878 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -39,6 +39,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ### Changed
 - Configuration: Filter.AnonymizeFilename added ability to retain file extension with custom text
 - Admin API: changed json structure for saving config settings.
+- RichMedia: parsers and their order are configured in `rich_media` config.
 
 ## [1.0.0] - 2019-06-29
 ### Security
diff --git a/docs/config.md b/docs/config.md
index a65b7a560..9a64f0ed7 100644
--- a/docs/config.md
+++ b/docs/config.md
@@ -425,6 +425,7 @@ This config contains two queues: `federator_incoming` and `federator_outgoing`.
 * `enabled`: if enabled the instance will parse metadata from attached links to generate link previews
 * `ignore_hosts`: list of hosts which will be ignored by the metadata parser. For example `["accounts.google.com", "xss.website"]`, defaults to `[]`.
 * `ignore_tld`: list TLDs (top-level domains) which will ignore for parse metadata. default is ["local", "localdomain", "lan"]
+* `parsers`: list of Rich Media parsers
 
 ## :fetch_initial_posts
 * `enabled`: if enabled, when a new user is federated with, fetch some of their latest posts