git.squeep.com Git - akkoma/blob - lib/pleroma/web/rich_media/parsers/ogp.ex

   1 defmodule Pleroma.Web.RichMedia.Parsers.OGP do
   2   def parse(html, data) do
   3     with elements = [_ | _] <- get_elements(html),
   4          ogp_data =
   5            Enum.reduce(elements, data, fn el, acc ->
   6              attributes = normalize_attributes(el)
   7
   8              Map.merge(acc, attributes)
   9            end) do
  10       {:ok, ogp_data}
  11     else
  12       _e -> {:error, "No OGP metadata found"}
  13     end
  14   end
  15
  16   defp get_elements(html) do
  17     html |> Floki.find("meta[property^='og:']")
  18   end
  19
  20   defp normalize_attributes(html_node) do
  21     {_tag, attributes, _children} = html_node
  22
  23     data =
  24       Enum.into(attributes, %{}, fn {name, value} ->
  25         {name, String.trim_leading(value, "og:")}
  26       end)
  27
  28     %{String.to_atom(data["property"]) => data["content"]}
  29   end
  30 end