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+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.RichMedia.Parsers.OEmbed do
+ def parse(html, _data) do
+ with elements = [_ | _] <- get_discovery_data(html),
+ oembed_url when is_binary(oembed_url) <- get_oembed_url(elements),
+ {:ok, oembed_data} <- get_oembed_data(oembed_url) do
+ oembed_data
+ else
+ _e -> %{}
+ end
+ end
+
+ defp get_discovery_data(html) do
+ html |> Floki.find("link[type='application/json+oembed']")
+ end
+
+ defp get_oembed_url([{"link", attributes, _children} | _]) do
+ Enum.find_value(attributes, fn {k, v} -> if k == "href", do: v end)
+ end
+
+ defp get_oembed_data(url) do
+ with {:ok, %Tesla.Env{body: json}} <- Pleroma.Web.RichMedia.Helpers.rich_media_get(url) do
+ Jason.decode(json)
+ end
+ end
+end