/*

  * Copyright 2008 the original author or authors.

  *

  * Licensed under the Apache License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  *

  *      http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.mockftpserver.fake.filesystem;

 import org.slf4j.Logger;

 import org.slf4j.LoggerFactory;

 import org.mockftpserver.core.util.StringUtil;

 import java.text.DateFormat;

 import java.text.SimpleDateFormat;

 import java.util.Locale;

 /**

  * Unix-specific implementation of the DirectoryListingFormatter interface.

  *

  * @author Chris Mair

  * @version $Revision: 264 $ - $Date: 2012-07-17 21:19:23 -0400 (Tue, 17 Jul 2012) $

  */

 public class UnixDirectoryListingFormatter implements DirectoryListingFormatter {

     private static final Logger LOG = LoggerFactory.getLogger(UnixDirectoryListingFormatter.class);

     private static final String DATE_FORMAT = "MMM dd  yyyy";

     private static final int SIZE_WIDTH = 15;

     private static final int OWNER_WIDTH = 8;

     private static final int GROUP_WIDTH = 8;

     private static final String NONE = "none";

     private Locale locale = Locale.ENGLISH;

     // "-rw-rw-r--    1 ftp      ftp           254 Feb 23  2007 robots.txt"

     // "-rw-r--r--    1 ftp      ftp      30014925 Apr 15 00:19 md5.sums.gz"

     // "-rwxr-xr-x   1 henry    users       5778 Dec  1  2005 planaccess.sql"

     /**

      * Format the directory listing for a single file/directory entry.

      *

      * @param fileSystemEntry - the FileSystemEntry for a single file system entry

      * @return the formatted directory listing

      */

     public String format(FileSystemEntry fileSystemEntry) {

         DateFormat dateFormat = new SimpleDateFormat(DATE_FORMAT, locale);

         String dateStr = dateFormat.format(fileSystemEntry.getLastModified());

         String dirOrFile = fileSystemEntry.isDirectory() ? "d" : "-";

         Permissions permissions = fileSystemEntry.getPermissions() != null ? fileSystemEntry.getPermissions() : Permissions.DEFAULT;

         String permissionsStr = StringUtil.padRight(permissions.asRwxString(), 9);

         String linkCountStr = "1";

         String ownerStr = StringUtil.padRight(stringOrNone(fileSystemEntry.getOwner()), OWNER_WIDTH);

         String groupStr = StringUtil.padRight(stringOrNone(fileSystemEntry.getGroup()), GROUP_WIDTH);

         String sizeStr = StringUtil.padLeft(Long.toString(fileSystemEntry.getSize()), SIZE_WIDTH);

         String listing = "" + dirOrFile + permissionsStr + "  " + linkCountStr + " " + ownerStr + " " + groupStr + " " + sizeStr + " " + dateStr + " " + fileSystemEntry.getName();

         LOG.info("listing=[" + listing + "]");

         return listing;

     }

     /**

      * Set the Locale to be used in formatting the date within file/directory listings

      * @param locale - the Locale instance

      */

     public void setLocale(Locale locale) {

         this.locale = locale;

     }

     private String stringOrNone(String string) {

         return (string == null) ? NONE : string;

     }

 }