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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.Helpers do
alias Pleroma.Activity
alias Pleroma.Config
alias Pleroma.HTML
alias Pleroma.Object
alias Pleroma.Web.RichMedia.Parser
@spec validate_page_url(URI.t() | binary()) :: :ok | :error
defp validate_page_url(page_url) when is_binary(page_url) do
validate_tld = Application.get_env(:auto_linker, :opts)[:validate_tld]
page_url
|> AutoLinker.Parser.url?(scheme: true, validate_tld: validate_tld)
|> parse_uri(page_url)
end
defp validate_page_url(%URI{host: host, scheme: "https", authority: authority})
when is_binary(authority) do
cond do
host in Config.get([:rich_media, :ignore_hosts], []) ->
:error
get_tld(host) in Config.get([:rich_media, :ignore_tld], []) ->
:error
true ->
:ok
end
end
defp validate_page_url(_), do: :error
defp parse_uri(true, url) do
url
|> URI.parse()
|> validate_page_url
end
defp parse_uri(_, _), do: :error
defp get_tld(host) do
host
|> String.split(".")
|> Enum.reverse()
|> hd
end
def fetch_data_for_activity(%Activity{data: %{"type" => "Create"}} = activity) do
with true <- Config.get([:rich_media, :enabled]),
%Object{} = object <- Object.normalize(activity),
false <- object.data["sensitive"] || false,
{:ok, page_url} <- HTML.extract_first_external_url(object, object.data["content"]),
:ok <- validate_page_url(page_url),
{:ok, rich_media} <- Parser.parse(page_url) do
%{page_url: page_url, rich_media: rich_media}
else
_ -> %{}
end
end
def fetch_data_for_activity(_), do: %{}
def perform(:fetch, %Activity{} = activity) do
fetch_data_for_activity(activity)
:ok
end
end
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