package org.apache.maven.wagon.providers.ssh;

 /*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you 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.

  */

 import org.apache.maven.wagon.TransferFailedException;

 import java.io.BufferedReader;

 import java.io.IOException;

 import java.io.StringReader;

 import java.util.ArrayList;

 import java.util.List;

 import java.util.regex.Matcher;

 import java.util.regex.Pattern;

 /**

  * LSParser

  *

  * @author <a href="mailto:joakim@erdfelt.com">Joakim Erdfelt</a>

  * @version $Id: LSParser.java 1174063 2011-09-22 11:22:43Z olamy $

  */

 public class LSParser

 {

     /**

      * output samples see LSParserTest:

      * <ul></ul>

      * <li>osx      "-rw-r--r--   1 joakim  joakim  1194 Dec 11     09:25 pom.xml"</li>

      * <li>osx fr : "-rw-r--r--   1 olamy   staff   19   21  sep    00:34 more-resources.dat"</li>

      * <li>cygwin : "drwxr-xr-x+  5 joakim  None    0    Dec 11     10:30 pom.xml"</li>

      * <li>linux :  "-rw-r--r--   1 joakim  joakim  1194 2006-12-11 09:25 pom.xml"</li>

      * </ul>

      */

     private static final Pattern PATTERN = Pattern.compile( ".+\\s+[0-9]+\\s+.+\\s+.+\\s+[0-9]+\\s+"

                                                                 //2006-12-11

                                                                 + "([0-9]{4}-[0-9]{2}-[0-9]{2}"

                                                                 // Dec 11

                                                                 + "|.+\\s+[0-9]+"

                                                                 // 21 sep

                                                                 + "|.+\\s+.+)"

                                                                 // 09:25 pom.xml

                                                                 + "\\s+[0-9:]+\\s+(.+?)" );

     /**

      * Parse a raw "ls -FlA", and obtain the list of files.

      *

      * @param rawLS the raw LS to parse.

      * @return the list of files found.

      * @throws TransferFailedException

      * @todo use ls -1a and do away with the method all together

      */

     public List<String> parseFiles( String rawLS )

         throws TransferFailedException

     {

         List<String> ret = new ArrayList<String>();

         try

         {

             BufferedReader br = new BufferedReader( new StringReader( rawLS ) );

             String line = br.readLine();

             while ( line != null )

             {

                 line = line.trim();

                 Matcher m = PATTERN.matcher( line );

                 if ( m.matches() )

                 {

                     ret.add( m.group( 2 ) );

                 }

                 line = br.readLine();

             }

         }

         catch ( IOException e )

         {

             throw new TransferFailedException( "Error parsing file listing.", e );

         }

         return ret;

     }

 }