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/*
 * Copyright 2023 Greptime Team
 *
 * 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 io.greptime.common.signal;

import java.io.File;
import java.nio.file.Paths;

/**
 *
 */
public class FileSignalHelper {
    private static final String[] EMPTY_ARRAY = new String[0];

    public static boolean ignoreSignal(FileSignal fileSignal) {
        return !Paths.get(FileOutputHelper.getOutDir(), fileSignal.getFilename())
                .toFile()
                .exists();
    }

    public static boolean ignoreFileOutputSignal() {
        return list().length > 0;
    }

    public static String[] list() {
        File dir = new File(FileOutputHelper.getOutDir());
        if (!dir.exists() || !dir.isDirectory()) {
            return EMPTY_ARRAY;
        }
        return dir.list((d, name) -> FileSignal.parse(name).isPresent());
    }
}