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/*
 * Copyright (c) 2007 through 2024 David Berkman
 *
 * This file is part of the SmallMind Code Project.
 *
 * The SmallMind Code Project is free software, you can redistribute
 * it and/or modify it under either, at your discretion...
 *
 * 1) The terms of GNU Affero General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at
 * your option) any later version.
 *
 * ...or...
 *
 * 2) The terms of the Apache License, Version 2.0.
 *
 * The SmallMind Code Project is distributed in the hope that it will
 * be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License or Apache License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * and the Apache License along with the SmallMind Code Project. If not, see
 *  or .
 *
 * Additional permission under the GNU Affero GPL version 3 section 7
 * ------------------------------------------------------------------
 * If you modify this Program, or any covered work, by linking or
 * combining it with other code, such other code is not for that reason
 * alone subject to any of the requirements of the GNU Affero GPL
 * version 3.
 */
package org.smallmind.web.jwt;

import org.jose4j.jws.JsonWebSignature;
import org.smallmind.web.json.scaffold.util.JsonCodec;
import org.smallmind.web.jwt.jose4j.JWTConsumer;

public class JWTCodec {

  public static String encode (Object claims, JWTKeyMaster keyMaster)
    throws Exception {

    return encode(claims, keyMaster, null);
  }

  public static String encode (Object claims, JWTKeyMaster keyMaster, String keyId)
    throws Exception {

    JsonWebSignature jws = new JsonWebSignature();

    jws.setPayloadBytes(JsonCodec.writeAsBytes(claims));
    jws.setKey(keyMaster.getKey());
    jws.setAlgorithmHeaderValue(keyMaster.getEncryptionAlgorithm().getCode());

    if (keyId != null) {
      jws.setKeyIdHeaderValue(keyId);
    }

    return jws.getCompactSerialization();
  }

  public static  T decode (String jwtToken, JWTKeyMaster keyMaster, Class claimsClass)
    throws Exception {

    return new JWTConsumer().process(jwtToken, keyMaster.getKey(), claimsClass);
  }

  public static  T decipher (String jwtToken, Class claimsClass)
    throws Exception {

    return new JWTConsumer().setSkipSignatureVerification(true).process(jwtToken, null, claimsClass);
  }
}