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lib/fast_rss.ex
defmodule FastRSS do
@moduledoc """
Parse RSS quickly using a Rust nif.
"""
defmodule Native do
@moduledoc false
use Rustler, otp_app: :fast_rss, crate: "fastrss"
# When your NIF is loaded, it will override this function.
def parse(_a), do: :erlang.nif_error(:nif_not_loaded)
end
@doc """
Parse a RSS string into a map
"""
@spec parse(String.t()) :: {:ok, map()} | {:error, String.t()}
def parse(""), do: {:error, "Cannot parse blank string"}
def parse(rss_string) when is_binary(rss_string) do
with {:ok, json} <- Native.parse(rss_string) do
Jason.decode(json, keys: :atoms)
end
end
def parse(_somethig_else), do: {:error, "Invalid RSS format"}
end