yegor256/takes

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014-2024 Yegor Bugayenko
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.takes.facets.fallback;

import java.util.regex.Pattern;
import lombok.EqualsAndHashCode;
import org.cactoos.Scalar;
import org.cactoos.iterable.Filtered;
import org.cactoos.list.ListOf;
import org.takes.Response;
import org.takes.Take;
import org.takes.misc.Opt;
import org.takes.rs.RsWithBody;
import org.takes.rs.RsWithStatus;
import org.takes.rs.RsWithType;
import org.takes.tk.TkFixed;

/**
 * Fallback on status code that equals to the provided value.
 *
 * <p>The class is immutable and thread-safe.
 *
 * @since 0.13
 */
@EqualsAndHashCode(callSuper = true)
public final class FbStatus extends FbWrap {

    /**
     * Whitespace pattern, used for splitting.
     */
    private static final Pattern WHITESPACE = Pattern.compile("\\s");

    /**
     * Ctor.
     * @param code HTTP status code
     * @since 0.16.10
     */
    public FbStatus(final int code) {
        this(new Filtered<>(value -> code == value.intValue(), code));
    }

    /**
     * Ctor.
     * @param check HTTP status code predicate
     * @since 0.16.10
     */
    public FbStatus(final Iterable<Integer> check) {
        this(check, req -> {
            final Response res = new RsWithStatus(req.code());
            return new Opt.Single<>(
                new RsWithType(
                    new RsWithBody(
                        res,
                        String.format(
                            "%s: %s", FbStatus.WHITESPACE.split(
                                res.head().iterator().next(),
                                2
                            )[1], req.throwable().getLocalizedMessage()
                        )
                    ), "text/plain"
                )
            );
        });
    }

    /**
     * Ctor.
     * @param code HTTP status code
     * @param response Response
     * @since 0.14
     */
    public FbStatus(final int code, final Response response) {
        this(code, new TkFixed(response));
    }

    /**
     * Ctor.
     * @param code HTTP status code
     * @param take Take
     */
    public FbStatus(final int code, final Take take) {
        this(
            code,
            (Fallback) req -> new Opt.Single<>(take.act(req))
        );
    }

    /**
     * Ctor.
     * @param code HTTP status code
     * @param fallback Fallback
     */
    public FbStatus(final int code, final Fallback fallback) {
        this(
            new Filtered<>(status -> code == status.intValue(), code),
            fallback
        );
    }

    /**
     * Ctor.
     * @param code HTTP status code
     * @param fallback Fallback
     */
    public FbStatus(final int code, final Scalar<Fallback> fallback) {
        this(
            new Filtered<>(status -> code == status.intValue(), code),
            fallback
        );
    }

    /**
     * Ctor.
     * @param check Check
     * @param fallback Fallback
     */
    public FbStatus(final Iterable<Integer> check, final Fallback fallback) {
        this(
            check,
            () -> fallback
        );
    }

    /**
     * Ctor.
     * @param check Check
     * @param fallback Fallback
     */
    @SuppressWarnings
        (
            {
                "PMD.CallSuperInConstructor",
                "PMD.ConstructorOnlyInitializesOrCallOtherConstructors"
            }
        )
    public FbStatus(final Iterable<Integer> check,
        final Scalar<Fallback> fallback) {
        super(
            req -> {
                Opt<Response> rsp = new Opt.Empty<>();
                if (new ListOf<>(check).contains(req.code())) {
                    rsp = fallback.value().route(req);
                }
                return rsp;
            }
        );
    }
}