/*
 * Copyright 2020-2030 码匠君<herodotus@aliyun.com>
 *
 * Dante Engine licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Dante Engine 是 Dante Cloud 系统核心组件库，采用 APACHE LICENSE 2.0 开源协议，您在使用过程中，需要注意以下几点：
 *
 * 1. 请不要删除和修改根目录下的LICENSE文件。
 * 2. 请不要删除和修改 Dante Engine 源码头部的版权声明。
 * 3. 请保留源码和相关描述文件的项目出处，作者声明等。
 * 4. 分发源码时候，请注明软件出处 <https://gitee.com/dromara/dante-cloud>
 * 5. 在修改包名，模块名称，项目代码等时，请注明软件出处 <https://gitee.com/dromara/dante-cloud>
 * 6. 若您的项目无法满足以上几点，可申请商业授权
 */

package org.dromara.dante.oauth2.authentication.provider;

import jakarta.servlet.http.HttpServletRequest;
import org.dromara.dante.core.constant.SystemConstants;
import org.dromara.dante.oauth2.authentication.utils.OAuth2EndpointUtils;
import org.dromara.dante.web.support.crypto.DigitalEnvelopeProcessor;
import org.springframework.security.core.Authentication;
import org.springframework.security.oauth2.core.endpoint.OAuth2ParameterNames;
import org.springframework.util.MultiValueMap;

import java.util.Map;

/**
 * <p>Description: 自定义密码模式认证转换器 </p>
 * <p>
 * {@code AuthenticationConverter} 类似于以前的 {@code AbstractTokenGranter}
 * 主要用途是从请求中获取参数，并拼装Token类
 *
 * @author : gengwei.zheng
 * @date : 2022/2/22 17:03
 */
public final class OAuth2ResourceOwnerPasswordAuthenticationConverter extends AbstractAuthenticationConverter {

    public OAuth2ResourceOwnerPasswordAuthenticationConverter(DigitalEnvelopeProcessor digitalEnvelopeProcessor) {
        super(digitalEnvelopeProcessor);
    }

    @Override
    public Authentication convert(HttpServletRequest request) {
        // grant_type (REQUIRED)
        String grantType = request.getParameter(OAuth2ParameterNames.GRANT_TYPE);
        if (!HerodotusGrantType.PASSWORD.getValue().equals(grantType)) {
            return null;
        }

        MultiValueMap<String, String> parameters = OAuth2EndpointUtils.getParameters(request);

        // scope (OPTIONAL)
        String scope = OAuth2EndpointUtils.checkOptionalParameter(parameters, OAuth2ParameterNames.SCOPE);

        // username (REQUIRED)
        OAuth2EndpointUtils.checkRequiredParameter(parameters, SystemConstants.USERNAME);

        // password (REQUIRED)
        OAuth2EndpointUtils.checkRequiredParameter(parameters, SystemConstants.PASSWORD);

        Map<String, Object> additionalParameters = getAdditionalParameters(request, parameters);
        // Validate DPoP Proof HTTP Header (if available)
        OAuth2EndpointUtils.validateAndAddDPoPParametersIfAvailable(request, additionalParameters);

        return new OAuth2ResourceOwnerPasswordAuthenticationToken(getClientPrincipal(), getRequestedScopes(scope), additionalParameters);
    }
}
