Show artist external links

lib/music_library/artists.ex

@@ -162,6 +162,11 @@ defmodule MusicLibrary.Artists do
     |> Repo.update()
   end
 
+  def favicon_url(external_link) do
+    uri = URI.parse(external_link.url)
+    "https://www.google.com/s2/favicons?domain=#{uri.host}&sz=16"
+  end
+
   defp get_collected_artist_ids do
     q =
       from ar in ArtistRecord,

lib/music_library/artists/artist_info.ex

@@ -62,4 +62,17 @@ defmodule MusicLibrary.Artists.ArtistInfo do
       image["type"] == type
     end)
   end
+
+  def relation_urls(artist_info, pattern \\ nil) do
+    case get_in(artist_info.musicbrainz_data, ["relations", Access.all(), "url", "resource"]) do
+      nil -> []
+      urls -> filter_urls(urls, pattern)
+    end
+  end
+
+  defp filter_urls(urls, nil), do: urls
+
+  defp filter_urls(urls, pattern) do
+    Enum.filter(urls, fn url -> String.contains?(url, pattern) end)
+  end
 end