/*
    * Copyright (C) 2009-2010, Google Inc. and others
    *
    * This program and the accompanying materials are made available under the
    * terms of the Eclipse Distribution License v. 1.0 which is available at
    * https://www.eclipse.org/org/documents/edl-v10.php.
    *
    * SPDX-License-Identifier: BSD-3-Clause
    */
  
  package org.eclipse.jgit.http.server;
  
  import static org.eclipse.jgit.http.server.ServletUtils.getRepository;
  import static org.eclipse.jgit.http.server.ServletUtils.sendPlainText;
  
  import java.io.IOException;
  
  import javax.servlet.http.HttpServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.eclipse.jgit.internal.storage.file.ObjectDirectory;
  import org.eclipse.jgit.internal.storage.file.Pack;
  import org.eclipse.jgit.lib.ObjectDatabase;
  
  /** Sends the current list of pack files, sorted most recent first. */
  class InfoPacksServlet extends HttpServlet {
  	private static final long serialVersionUID = 1L;
  
  	/** {@inheritDoc} */
  	@Override
  	public void doGet(final HttpServletRequest req,
  			final HttpServletResponse rsp) throws IOException {
  		sendPlainText(packList(req), req, rsp);
  	}
  
  	private static String packList(HttpServletRequest req) {
  		final StringBuilder out = new StringBuilder();
  		final ObjectDatabase db = getRepository(req).getObjectDatabase();
  		if (db instanceof ObjectDirectory) {
  			for (Pack pack : ((ObjectDirectory) db).getPacks()) {
  				out.append("P ");
  				out.append(pack.getPackFile().getName());
  				out.append('\n');
  			}
  		}
  		out.append('\n');
  		return out.toString();
  	}
  }