mobilizon/lib/service/rich_media/parsers/ogp.ex

47 lines
1.3 KiB
Elixir
Raw Normal View History

# Portions of this file are derived from Pleroma:
# Pleroma: A lightweight social networking server
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Mobilizon.Service.RichMedia.Parsers.OGP do
@moduledoc """
Module to parse OpenGraph data in HTML pages
"""
require Logger
alias Mobilizon.Service.RichMedia.Parsers.MetaTagsParser
def parse(html, data) do
Logger.debug("Using OpenGraph card parser")
with {:ok, data} <-
MetaTagsParser.parse(
html,
data,
"og",
"No OGP metadata found",
"property"
) do
data = transform_tags(data)
Logger.debug("Data found with OpenGraph card parser")
{:ok, data}
end
end
defp transform_tags(data) do
data
|> Map.put(:image_remote_url, Map.get(data, :image))
|> Map.put(:width, get_integer_value(data, :"image:width"))
|> Map.put(:height, get_integer_value(data, :"image:height"))
end
@spec get_integer_value(Map.t(), atom()) :: integer() | nil
defp get_integer_value(data, key) do
with value when not is_nil(value) <- Map.get(data, key),
{value, ""} <- Integer.parse(value) do
value
else
_ -> nil
end
end
end