/*
    * 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.
   */
  package org.apache.maven.scm.provider.svn.svnexe.command.status;
  
  import java.io.File;
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.maven.scm.ScmFile;
  import org.apache.maven.scm.ScmFileStatus;
  import org.apache.maven.scm.util.AbstractConsumer;
  
  /**
   * @author <a href="mailto:trygvis@inamo.no">Trygve Laugst&oslash;l</a>
   */
  public class SvnStatusConsumer extends AbstractConsumer {
      private final File workingDirectory;
  
      private final List<ScmFile> changedFiles = new ArrayList<>();
  
      // ----------------------------------------------------------------------
      //
      // ----------------------------------------------------------------------
  
      public SvnStatusConsumer(File workingDirectory) {
          this.workingDirectory = workingDirectory;
      }
  
      // ----------------------------------------------------------------------
      // StreamConsumer Implementation
      // ----------------------------------------------------------------------
  
      /**
       * {@inheritDoc}
       */
      public void consumeLine(String line) {
          if (logger.isDebugEnabled()) {
              logger.debug(line);
          }
          if (line.trim().isEmpty()) {
              return;
          }
  
          if (line.length() <= 7) {
              if (logger.isWarnEnabled()) {
                  logger.warn("Unexpected input, the line must be at least seven characters long. Line: '" + line + "'.");
              }
  
              return;
          }
  
          String statusString = line.substring(0, 1);
  
          String file = line.substring(7).trim();
  
          ScmFileStatus status;
  
          //  The first six columns in the output are each one character wide:
          //    First column: Says if item was added, deleted, or otherwise changed
          //      ' ' no modifications
          //      'A' Added
          //      'C' Conflicted
          //      'D' Deleted
          //      'I' Ignored
          //      'M' Modified
          //      'R' Replaced
          //      'X' item is unversioned, but is used by an externals definition
          //      '?' item is not under version control
          //      '!' item is missing (removed by non-svn command) or incomplete
          //      '~' versioned item obstructed by some item of a different kind
          //    Second column: Modifications of a file's or directory's properties
          //      ' ' no modifications
          //      'C' Conflicted
          //      'M' Modified
          //    Third column: Whether the working copy directory is locked
          //      ' ' not locked
          //      'L' locked
          //    Fourth column: Scheduled commit will contain addition-with-history
          //      ' ' no history scheduled with commit
          //      '+' history scheduled with commit
          //    Fifth column: Whether the item is switched relative to its parent
          //      ' ' normal
          //      'S' switched
         //    Sixth column: Repository lock token
         //      (without -u)
         //      ' ' no lock token
         //      'K' lock token present
         //      (with -u)
         //      ' ' not locked in repository, no lock token
         //      'K' locked in repository, lock toKen present
         //      'O' locked in repository, lock token in some Other working copy
         //      'T' locked in repository, lock token present but sTolen
         //      'B' not locked in repository, lock token present but Broken
         //
         //  The out-of-date information appears in the eighth column (with -u):
         //      '*' a newer revision exists on the server
         //      ' ' the working copy is up to date
         if (statusString.equals("A")) {
             status = ScmFileStatus.ADDED;
         } else if (statusString.equals("M") || statusString.equals("R") || statusString.equals("~")) {
             status = ScmFileStatus.MODIFIED;
         } else if (statusString.equals("D")) {
             status = ScmFileStatus.DELETED;
         } else if (statusString.equals("?")) {
             status = ScmFileStatus.UNKNOWN;
         } else if (statusString.equals("!")) {
             status = ScmFileStatus.MISSING;
         } else if (statusString.equals("C")) {
             status = ScmFileStatus.CONFLICT;
         } else if (statusString.equals("L")) {
             status = ScmFileStatus.LOCKED;
         } else if (statusString.equals("X")) {
             // skip svn:external entries
             return;
         } else if (statusString.equals("I")) {
             // skip svn:external entries
             return;
         } else {
             // Parse the second column
             statusString = line.substring(1, 1);
 
             // The line isn't a status line, ie something like 'Performing status on external item at...'
             // or a status defined in next columns
             return;
         }
 
         // If the file isn't a file; don't add it.
         if (!status.equals(ScmFileStatus.DELETED) && !new File(workingDirectory, file).isFile()) {
             return;
         }
 
         changedFiles.add(new ScmFile(file, status));
     }
 
     public List<ScmFile> getChangedFiles() {
         return changedFiles;
     }
 }