/*
 * Copyright 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.gradle.api.internal.changedetection.state;

import org.apache.commons.io.IOUtils;

import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

public class ZipTree implements ResourceTree {
    private final FileSnapshot zipFile;

    public ZipTree(FileSnapshot zipFile) {
        this.zipFile = zipFile;
    }

    @Override
    public void visit(ResourceWithContentsVisitor visitor) throws IOException {
        String zipFilePath = zipFile.getPath();
        InputStream fileInputStream = null;
        try {
            fileInputStream = Files.newInputStream(Paths.get(zipFilePath));
            ZipInputStream zipInput = new ZipInputStream(fileInputStream);
            ZipEntry zipEntry;

            while ((zipEntry = zipInput.getNextEntry()) != null) {
                if (zipEntry.isDirectory()) {
                    continue;
                }
                visitor.visitZipFileEntry(zipEntry, zipInput);
            }
        } finally {
            IOUtils.closeQuietly(fileInputStream);
        }
    }
}
