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/*
 * The MIT License
 *
 * Copyright 2019 Intuit Inc.
 *
 * 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 NONINFRINGEMENT. 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 com.intuit.karate.job;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.function.Predicate;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;

/**
 *
 * @author pthomas3
 */
public class JobUtils {

    public static void zip(File src, File dest) {
        try {
            src = src.getCanonicalFile();
            FileOutputStream fos = new FileOutputStream(dest);
            ZipOutputStream zipOut = new ZipOutputStream(fos);
            zip(src, "", zipOut, 0);
            zipOut.close();
            fos.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    private static void zip(File fileToZip, String fileName, ZipOutputStream zipOut, int level) throws IOException {
        if (fileToZip.isHidden()) {
            return;
        }
        if (fileToZip.isDirectory()) {
            String entryName = fileName;
            zipOut.putNextEntry(new ZipEntry(entryName + "/"));
            zipOut.closeEntry();
            File[] children = fileToZip.listFiles();
            for (File childFile : children) {
                String childFileName = childFile.getName();
                // TODO improve ?
                if (childFileName.equals("target") || childFileName.equals("build")) {
                    continue;
                }
                if (level != 0) {
                    childFileName = entryName + "/" + childFileName;
                }
                zip(childFile, childFileName, zipOut, level + 1);
            }
            return;
        }
        ZipEntry zipEntry = new ZipEntry(fileName);
        zipOut.putNextEntry(zipEntry);
        FileInputStream fis = new FileInputStream(fileToZip);
        byte[] bytes = new byte[1024];
        int length;
        while ((length = fis.read(bytes)) >= 0) {
            zipOut.write(bytes, 0, length);
        }
        fis.close();
    }

    public static void unzip(File src, File dest) {
        try {
            byte[] buffer = new byte[1024];
            ZipInputStream zis = new ZipInputStream(new FileInputStream(src));
            ZipEntry zipEntry = zis.getNextEntry();
            while (zipEntry != null) {
                File newFile = createFile(dest, zipEntry);
                if (zipEntry.isDirectory()) {
                    newFile.mkdirs();
                } else {
                    File parentFile = newFile.getParentFile();
                    if (parentFile != null && !parentFile.exists()) {
                        parentFile.mkdirs();
                    }
                    FileOutputStream fos = new FileOutputStream(newFile);
                    int len;
                    while ((len = zis.read(buffer)) > 0) {
                        fos.write(buffer, 0, len);
                    }
                    fos.close();
                }
                zipEntry = zis.getNextEntry();
            }
            zis.closeEntry();
            zis.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    private static File createFile(File destinationDir, ZipEntry zipEntry) throws IOException {
        File destFile = new File(destinationDir, zipEntry.getName());
        String destDirPath = destinationDir.getCanonicalPath();
        String destFilePath = destFile.getCanonicalPath();
        if (!destFilePath.startsWith(destDirPath)) {
            throw new IOException("entry outside target dir: " + zipEntry.getName());
        }
        return destFile;
    }

    public static File getFirstFileMatching(File parent, Predicate predicate) {
        File[] files = parent.listFiles((f, n) -> predicate.test(n));
        return files == null || files.length == 0 ? null : files[0];
    }

}




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