+
+ defp parse_datetime(datetime) when is_binary(datetime) do
+ NaiveDateTime.from_iso8601(datetime)
+ end
+
+ defp parse_datetime(datetime), do: datetime
+
+ def get_or_update_favicon(%URI{host: host} = instance_uri) do
+ existing_record = Repo.get_by(Instance, %{host: host})
+ now = NaiveDateTime.utc_now()
+
+ if existing_record && existing_record.favicon_updated_at &&
+ NaiveDateTime.diff(now, existing_record.favicon_updated_at) < 86_400 do
+ existing_record.favicon
+ else
+ favicon = scrape_favicon(instance_uri)
+
+ if existing_record do
+ existing_record
+ |> changeset(%{favicon: favicon, favicon_updated_at: now})
+ |> Repo.update()
+ else
+ %Instance{}
+ |> changeset(%{host: host, favicon: favicon, favicon_updated_at: now})
+ |> Repo.insert()
+ end
+
+ favicon
+ end
+ end
+
+ defp scrape_favicon(%URI{} = instance_uri) do
+ try do
+ with {:ok, %Tesla.Env{body: html}} <-
+ Pleroma.HTTP.get(to_string(instance_uri), [{:Accept, "text/html"}]),
+ favicon_rel <-
+ html
+ |> Floki.parse_document!()
+ |> Floki.attribute("link[rel=icon]", "href")
+ |> List.first(),
+ favicon <- URI.merge(instance_uri, favicon_rel) |> to_string(),
+ true <- is_binary(favicon) do
+ favicon
+ else
+ _ -> nil
+ end
+ rescue
+ _ -> nil
+ end
+ end