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gleam_stdlib

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A standard library for the Gleam programming language

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gleam_stdlib src gleam@base.erl
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src/gleam@base.erl 

-module(gleam@base).

-compile([no_auto_import, nowarn_unused_vars]).



-export([encode64/2, url_encode64/2, decode64/1, url_decode64/1]).



-spec encode64(bitstring(), boolean()) -> binary().

encode64(Input, Padding) ->

    Encoded = base64:encode(Input),

    case Padding of

        true ->

            Encoded;



        false ->

            gleam@string:replace(Encoded, <<"="/utf8>>, <<""/utf8>>)

    end.



-spec url_encode64(bitstring(), boolean()) -> binary().

url_encode64(Input, Padding) ->

    _pipe = encode64(Input, Padding),

    _pipe@1 = gleam@string:replace(_pipe, <<"+"/utf8>>, <<"-"/utf8>>),

    gleam@string:replace(_pipe@1, <<"/"/utf8>>, <<"_"/utf8>>).



-spec decode64(binary()) -> {ok, bitstring()} | {error, nil}.

decode64(Encoded) ->

    Padded = case gleam@bit_string:byte_size(

        gleam@bit_string:from_string(Encoded)

    )

    rem 4 of

        0 ->

            Encoded;



        N ->

            gleam@string:append(

                Encoded,

                gleam@string:repeat(<<"="/utf8>>, 4 - N)

            )

    end,

    gleam_stdlib:base_decode64(Padded).



-spec url_decode64(binary()) -> {ok, bitstring()} | {error, nil}.

url_decode64(Encoded) ->

    _pipe = Encoded,

    _pipe@1 = gleam@string:replace(_pipe, <<"-"/utf8>>, <<"+"/utf8>>),

    _pipe@2 = gleam@string:replace(_pipe@1, <<"_"/utf8>>, <<"/"/utf8>>),

    decode64(_pipe@2).