/*
 *  Copyright (c)  WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 *  WSO2 Inc. licenses this file to you 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.
 */
package org.wso2.carbon.identity.entitlement.filter.callback;

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.wso2.carbon.identity.entitlement.filter.exception.EntitlementFilterException;

import javax.servlet.http.HttpServletRequest;

public class BasicAuthCallBackHandler extends EntitlementFilterCallBackHandler {

    private static final Log log = LogFactory.getLog(BasicAuthCallBackHandler.class);

    public BasicAuthCallBackHandler(HttpServletRequest request) throws EntitlementFilterException {
        String authHeaderEn = null;
        if (!(request.getHeader("Authorization") == null || request.getHeader("Authorization").equals("null"))) {
            authHeaderEn = request.getHeader("Authorization");
            String tempArr[] = authHeaderEn.split(" ");
            if (tempArr.length == 2) {
                String authHeaderDc = new String(Base64.decodeBase64(tempArr[1].getBytes()));
                tempArr = authHeaderDc.split(":");
                if (tempArr.length == 2) {
                    setUserName(tempArr[0]);
                }
            }
            throw new EntitlementFilterException("Unable to retrieve username from Authorization header");
        }
    }
}
