/**
 * Copyright (C) 2018 Cambridge Systematics, Inc.
 *
 * 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.
 */
package org.onebusaway.admin.util;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.security.web.util.matcher.RegexRequestMatcher;
import org.springframework.security.web.util.matcher.RequestMatcher;

import java.util.regex.Pattern;

import javax.servlet.http.HttpServletRequest;

public class CsrfSecurityRequestMatcher implements RequestMatcher {
    private static Logger _log = LoggerFactory.getLogger(CsrfSecurityRequestMatcher.class);

    private Pattern allowedMethods = Pattern.compile("^(GET|HEAD|TRACE|OPTIONS)$");
    private RegexRequestMatcher unprotectedMatcher = new RegexRequestMatcher("/api/build/.*", null);

    @Override
    public boolean matches(HttpServletRequest request) {
        if(allowedMethods.matcher(request.getMethod()).matches()){
            return false;
        }
        boolean rejected = !unprotectedMatcher.matches(request);
        if (rejected) {
            _log.error("request " + request.getRequestURL() + " REJECTED");
            _log.error("matcher=" + unprotectedMatcher.toString());
        }
        return rejected;
    }
}
