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/*
 * The MIT License (MIT) Copyright (c) 2020-2023 artipie.com
 * https://github.com/artipie/artipie/blob/master/LICENSE.txt
 */
package com.artipie.http.rt;

import com.artipie.http.Response;
import com.artipie.http.Slice;
import java.nio.ByteBuffer;
import java.util.Map;
import java.util.Optional;
import org.reactivestreams.Publisher;

/**
 * Rule-based route path.
 * 
 * A path to slice with routing rule. If
 * {@link RtRule} passed, then the request will be redirected to
 * underlying {@link Slice}.
 * 
 * @since 0.10
 */
public final class RtRulePath implements RtPath {

    /**
     * Routing rule.
     */
    private final RtRule rule;

    /**
     * Slice under route.
     */
    private final Slice slice;

    /**
     * New routing path.
     * @param rule Rules to apply
     * @param slice Slice to call
     */
    public RtRulePath(final RtRule rule, final Slice slice) {
        this.rule = rule;
        this.slice = slice;
    }

    @Override
    public Optional response(
        final String line,
        final Iterable> headers,
        final Publisher body
    ) {
        final Optional res;
        if (this.rule.apply(line, headers)) {
            res = Optional.of(this.slice.response(line, headers, body));
        } else {
            res = Optional.empty();
        }
        return res;
    }
}