@doc """
Set the rich media cache based on the expiration time of image.
- Define a module that has `run` function
+ Adopt behaviour `Pleroma.Web.RichMedia.Parser.TTL`
## Example
defmodule MyModule do
- def run(data, url) do
+ @behaviour Pleroma.Web.RichMedia.Parser.TTL
+ def ttl(data, url) do
image_url = Map.get(data, :image)
# do some parsing in the url and get the ttl of the image
- # ttl is unix time
- ttl = parse_ttl_from_url(image_url)
- Cachex.expire_at(:rich_media_cache, url, ttl * 1000)
+ # and return ttl is unix time
+ parse_ttl_from_url(image_url)
end
end
ttl_setters: [MyModule]
"""
def set_ttl_based_on_image({:ok, data}, url) do
- case Cachex.ttl(:rich_media_cache, url) do
- {:ok, nil} ->
- modules = Pleroma.Config.get([:rich_media, :ttl_setters])
-
- if Enum.count(modules) > 0 do
- Enum.each(modules, & &1.run(data, url))
- end
-
- {:ok, data}
-
+ with {:ok, nil} <- Cachex.ttl(:rich_media_cache, url),
+ ttl when is_number(ttl) <- get_ttl_from_image(data, url) do
+ Cachex.expire_at(:rich_media_cache, url, ttl * 1000)
+ {:ok, data}
+ else
_ ->
{:ok, data}
end
end
- def set_ttl_based_on_image(data, _url), do: data
+ defp get_ttl_from_image(data, url) do
+ Pleroma.Config.get([:rich_media, :ttl_setters])
+ |> Enum.reduce({:ok, nil}, fn
+ module, {:ok, _ttl} ->
+ module.ttl(data, url)
+
+ _, error ->
+ error
+ end)
+ end
defp parse_url(url) do
try do
{:ok, %Tesla.Env{body: html}} = Pleroma.HTTP.get(url, [], adapter: @hackney_options)
html
+ |> parse_html
|> maybe_parse()
+ |> Map.put(:url, url)
|> clean_parsed_data()
|> check_parsed_data()
rescue
end
end
+ defp parse_html(html), do: Floki.parse(html)
+
defp maybe_parse(html) do
Enum.reduce_while(parsers(), %{}, fn parser, acc ->
case parser.parse(html, acc) do
end)
end
- defp check_parsed_data(%{title: title} = data) when is_binary(title) and byte_size(title) > 0 do
+ defp check_parsed_data(%{title: title} = data)
+ when is_binary(title) and byte_size(title) > 0 do
{:ok, data}
end