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/** 
 * Copyright (C) 2018 BonitaSoft S.A.
 * BonitaSoft, 32 rue Gustave Eiffel - 38000 Grenoble
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2.0 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see .
 */
package org.bonitasoft.web.client.services.utils;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

/** @author Baptiste Mesta. */
public final class FileUtils {

    private FileUtils() {
        // Utility class
    }

    public static byte[] getFileFromZip(File zip, String filePath) throws IOException {
        try (ZipInputStream zipInputStream = new ZipInputStream(new FileInputStream(zip))) {
            ZipEntry zipEntry;
            while ((zipEntry = zipInputStream.getNextEntry()) != null) {
                if (zipEntry.getName().equals(filePath) && !zipEntry.isDirectory()) {
                    return readFully(zipInputStream);
                }
            }
            throw new FileNotFoundException(String.format("Entry %s not found in zip", filePath));
        }
    }

    public static byte[] readFully(InputStream in) throws IOException {
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        byte[] buf = new byte[1024];
        int n;
        while ((n = in.read(buf)) > 0) {
            out.write(buf, 0, n);
        }
        return out.toByteArray();
    }
}