package ru.gravit.utils;

import ru.gravit.utils.helper.IOHelper;
import ru.gravit.utils.helper.LogHelper;

import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.nio.channels.Channels;
import java.nio.channels.ReadableByteChannel;
import java.nio.file.Path;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

public class HttpDownloader {
    public static void downloadFile(URL url, String file) throws IOException {
        ReadableByteChannel rbc = Channels.newChannel(url.openStream());
        try (FileOutputStream fos = new FileOutputStream(file)) {
            fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
        }
    }

    public static void downloadZip(URL url, Path dir) throws IOException {
        try (ZipInputStream input = IOHelper.newZipInput(url)) {
            for (ZipEntry entry = input.getNextEntry(); entry != null; entry = input.getNextEntry()) {
                if (entry.isDirectory())
					continue; // Skip directories
                // Unpack entry
                String name = entry.getName();
                LogHelper.subInfo("Downloading file: '%s'", name);
                IOHelper.transfer(input, dir.resolve(IOHelper.toPath(name)));
            }
        }
    }
}