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Remote controlled frontend framework for Phoenix.
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lib/drab/coder/base64.ex
defmodule Drab.Coder.Base64 do
@moduledoc false
@invalid_argument {:error, "invalid argument; only string is allowed"}
@spec encode(term) :: Drab.Coder.return()
@doc """
Encode string to Base64.
iex> Drab.Coder.Base64.encode("test")
{:ok, "dGVzdA=="}
iex> Drab.Coder.Base64.encode(42)
{:error, "invalid argument; only string is allowed"}
"""
def encode(string) when is_binary(string), do: {:ok, Base.encode64(string)}
def encode(_), do: @invalid_argument
@spec encode!(String.t()) :: String.t()
@doc """
Bang version of encode/1.
iex> Drab.Coder.Base64.encode!("test")
"dGVzdA=="
"""
defdelegate encode!(string), to: Base, as: :encode64
@doc """
Decode string from Base64.
iex> Drab.Coder.Base64.decode("dGVzdA==")
{:ok, "test"}
iex> Drab.Coder.Base64.decode(42)
{:error, "invalid argument; only string is allowed"}
"""
@spec decode(String.t()) :: Drab.Coder.return()
def decode(string) when is_binary(string) do
case Base.decode64(string) do
:error -> {:error, "string is not base-64 encoded"}
result -> result
end
end
def decode(_), do: @invalid_argument
@doc """
Bang version of decode/1
iex> Drab.Coder.Base64.decode!("dGVzdA==")
"test"
"""
@spec decode!(String.t()) :: String.t()
defdelegate decode!(string), to: Base, as: :decode64!
end