/*
 * Copyright 2002-2017 the original author or authors.
 *
 * 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.springframework.security.web.server;

import org.springframework.security.web.server.util.matcher.ServerWebExchangeMatcher;
import org.springframework.util.Assert;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.WebFilter;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;

import java.util.List;

/**
 * A {@link SecurityWebFilterChain} that leverages a {@link ServerWebExchangeMatcher} to determine which
 * {@link WebFilter} to execute.
 *
 * @author Rob Winch
 * @since 5.0
 */
public class MatcherSecurityWebFilterChain implements SecurityWebFilterChain {
	private final ServerWebExchangeMatcher matcher;
	private final List<WebFilter> filters;

	public MatcherSecurityWebFilterChain(ServerWebExchangeMatcher matcher, List<WebFilter> filters) {
		Assert.notNull(matcher, "matcher cannot be null");
		Assert.notEmpty(filters, "filters cannot be null or empty. Got " + filters);
		this.matcher = matcher;
		this.filters = filters;
	}

	@Override
	public Mono<Boolean> matches(ServerWebExchange exchange) {
		return matcher.matches(exchange)
			.map( m -> m.isMatch() );
	}

	@Override
	public Flux<WebFilter> getWebFilters() {
		return Flux.fromIterable(this.filters);
	}
}
