From e0b5edb6d5a423bfd247e0774d2f5bc642b2fb80 Mon Sep 17 00:00:00 2001
From: Ivan Tashkinov <ivantashkinov@gmail.com>
Date: Wed, 30 Dec 2020 14:42:35 +0300
Subject: [PATCH] [#3213] Fixed Object.object_data_hashtags/1 to process only
 AS2 elements of `data.tag` (basing on #2984).

---
 lib/pleroma/object.ex | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/lib/pleroma/object.ex b/lib/pleroma/object.ex
index 08114d4f2..dad572f2b 100644
--- a/lib/pleroma/object.ex
+++ b/lib/pleroma/object.ex
@@ -405,8 +405,16 @@ defmodule Pleroma.Object do
   defp embedded_hashtags(_), do: []
 
   defp object_data_hashtags(%{"tag" => tags}) when is_list(tags) do
-    # Note: AS2 map-type elements are ignored
-    Enum.filter(tags, &is_bitstring(&1))
+    # Note: Old format with copy of hashtags as strings is ignored, using AS2
+    tags
+    |> Enum.filter(fn
+      %{"type" => "Hashtag"} = data -> Map.has_key?(data, "name")
+      _ -> false
+    end)
+    |> Enum.map(fn
+      %{"name" => "#" <> hashtag} -> String.downcase(hashtag)
+      %{"name" => hashtag} -> String.downcase(hashtag)
+    end)
   end
 
   defp object_data_hashtags(_), do: []