/*
 * MIT License
 *
 * Copyright (c) 2020-present Cloudogu GmbH and Contributors
 *
 * 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 sonia.scm.plugin;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

class SmpDescriptorExtractor {

  InstalledPluginDescriptor extractPluginDescriptor(Path file) throws IOException {
    try (ZipInputStream zipInputStream = new ZipInputStream(Files.newInputStream(file), StandardCharsets.UTF_8))    {
      ZipEntry nextEntry;
      while ((nextEntry = zipInputStream.getNextEntry()) != null) {
        if ("META-INF/scm/plugin.xml".equals(nextEntry.getName())) {
          JAXBContext context = JAXBContext.newInstance(ScmModule.class, InstalledPluginDescriptor.class);
          return (InstalledPluginDescriptor) context.createUnmarshaller().unmarshal(zipInputStream);
        }
      }
    } catch (JAXBException e) {
      throw new IOException("failed to read descriptor file META-INF/scm/plugin.xml from plugin", e);
    }
    throw new IOException("Missing plugin descriptor META-INF/scm/plugin.xml in download package");
  }
}
