// Copyright (c) 2021 Edward Shen
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

use base64::alphabet::URL_SAFE;
use base64::engine::general_purpose::GeneralPurpose;
use base64::engine::general_purpose::GeneralPurposeConfig;
use base64::DecodeError;
use base64::Engine;

const URL_BASE64: GeneralPurpose = GeneralPurpose::new(&URL_SAFE, GeneralPurposeConfig::new());

/// URL-safe Base64 encoding.
pub fn encode(input: impl AsRef<[u8]>) -> String {
    URL_BASE64.encode(input)
}

/// URL-safe Base64 decoding.
///
/// # Errors
///
/// Returns an error if a buffer cannot be decoded, such as if there's an
/// incorrect number of bytes.
pub fn decode(input: impl AsRef<[u8]>) -> Result<Vec<u8>, DecodeError> {
    URL_BASE64.decode(input)
}
