package org.apache.maven.scm.provider.git.gitexe.command.remove;

/*
 * 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.scm.ScmFile;
import org.apache.maven.scm.ScmFileStatus;
import org.apache.maven.scm.provider.git.gitexe.command.status.GitStatusConsumer;
import org.apache.maven.scm.util.AbstractConsumer;

import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * @author <a href="mailto:struberg@yahoo.de">Mark Struberg</a>
 * @author Olivier Lamy
 *
 */
public class GitRemoveConsumer
        extends AbstractConsumer
{
    /**
     * The pattern used to match deleted file lines
     */
    private static final Pattern REMOVED_PATTERN = Pattern.compile( "^rm\\s'(.*)'" );

    private final List<ScmFile> removedFiles = new ArrayList<>();

    private final URI relativeRepositoryPath;

    // ----------------------------------------------------------------------
    // StreamConsumer Implementation
    // ----------------------------------------------------------------------

    public GitRemoveConsumer()
    {
        this( null );
    }

    public GitRemoveConsumer( URI relativeRepositoryPath )
    {
        this.relativeRepositoryPath = relativeRepositoryPath;
    }

    /**
     * {@inheritDoc}
     */
    public void consumeLine( String line )
    {
        if ( line.length() <= 2 )
        {
            return;
        }

        Matcher matcher = REMOVED_PATTERN.matcher( line );
        if ( matcher.matches() )
        {
            String file = GitStatusConsumer.resolvePath( matcher.group( 1 ), relativeRepositoryPath );
            removedFiles.add( new ScmFile( file, ScmFileStatus.DELETED ) );
        }
        else
        {
            if ( logger.isInfoEnabled() )
            {
                logger.info( "could not parse line: " + line );
            }

            return;
        }
    }

    public List<ScmFile> getRemovedFiles()
    {
        return removedFiles;
    }

}
