Emoji: Also accept regional indicators

lib/pleroma/emoji.ex

@@ -104,6 +104,11 @@ defp update_emojis(emojis) do
 
   @external_resource "lib/pleroma/emoji-test.txt"
 
+  regional_indicators =
+    Enum.map(127_462..127_487, fn codepoint ->
+      <<codepoint::utf8>>
+    end)
+
   emojis =
     @external_resource
     |> File.read!()
@@ -125,6 +130,8 @@ defp update_emojis(emojis) do
     end)
     |> Enum.uniq()
 
+  emojis = emojis ++ regional_indicators
+
   for emoji <- emojis do
     def is_unicode_emoji?(unquote(emoji)), do: true
   end

test/pleroma/emoji_test.exs

@@ -20,6 +20,11 @@ test "tells if a string is an unicode emoji" do
       assert Emoji.is_unicode_emoji?("🤰")
       assert Emoji.is_unicode_emoji?("❤️")
       assert Emoji.is_unicode_emoji?("🏳️‍⚧️")
+
+      # Additionally, we accept regional indicators.
+      assert Emoji.is_unicode_emoji?("🇵")
+      assert Emoji.is_unicode_emoji?("🇴")
+      assert Emoji.is_unicode_emoji?("🇬")
     end
   end