package org.apache.continuum.webdav;
   
   /*
    * 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.continuum.buildagent.configuration.BuildAgentConfigurationService;
  import org.apache.continuum.webdav.util.WebdavMethodUtil;
  import org.apache.continuum.webdav.util.WorkingCopyPathUtil;
  import org.apache.jackrabbit.webdav.DavException;
  import org.apache.jackrabbit.webdav.DavResource;
  import org.apache.jackrabbit.webdav.DavResourceFactory;
  import org.apache.jackrabbit.webdav.DavResourceLocator;
  import org.apache.jackrabbit.webdav.DavServletRequest;
  import org.apache.jackrabbit.webdav.DavServletResponse;
  import org.apache.jackrabbit.webdav.DavSession;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.io.File;
  import javax.activation.MimetypesFileTypeMap;
  import javax.servlet.http.HttpServletResponse;
  
  /**
   * @plexus.component role="org.apache.continuum.webdav.ContinuumBuildAgentDavResourceFactory"
   */
  public class ContinuumBuildAgentDavResourceFactory
      implements DavResourceFactory
  {
      private static final Logger log = LoggerFactory.getLogger( ContinuumBuildAgentDavResourceFactory.class );
  
      private static final MimetypesFileTypeMap mimeTypes;
  
      /**
       * @plexus.requirement
       */
      private BuildAgentConfigurationService buildAgentConfigurationService;
  
      static
      {
          mimeTypes = new MimetypesFileTypeMap();
          mimeTypes.addMimeTypes( "application/java-archive jar war ear" );
          mimeTypes.addMimeTypes( "application/java-class class" );
          mimeTypes.addMimeTypes( "image/png png" );
      }
  
      public DavResource createResource( final DavResourceLocator locator, final DavSession davSession )
          throws DavException
      {
          ContinuumBuildAgentDavResourceLocator continuumLocator = checkLocatorIsInstanceOfContinuumBuildAgentLocator(
              locator );
  
          String logicalResource = WorkingCopyPathUtil.getLogicalResource( locator.getResourcePath() );
          if ( logicalResource.startsWith( "/" ) )
          {
              logicalResource = logicalResource.substring( 1 );
          }
  
          File resourceFile = getResourceFile( continuumLocator.getProjectId(), logicalResource );
  
          if ( !resourceFile.exists() || ( continuumLocator.getHref( false ).endsWith( "/" ) &&
              !resourceFile.isDirectory() ) )
          {
              // force a resource not found
              log.error( "Resource file '" + resourceFile.getAbsolutePath() + "' does not exist" );
              throw new DavException( HttpServletResponse.SC_NOT_FOUND, "Resource does not exist" );
          }
          else
          {
              return createResource( resourceFile, logicalResource, davSession, continuumLocator );
          }
      }
  
      public DavResource createResource( DavResourceLocator locator, DavServletRequest request,
                                         DavServletResponse response )
          throws DavException
      {
          ContinuumBuildAgentDavResourceLocator continuumLocator = checkLocatorIsInstanceOfContinuumBuildAgentLocator(
              locator );
  
          if ( !WebdavMethodUtil.isReadMethod( request.getMethod() ) )
          {
              throw new DavException( HttpServletResponse.SC_METHOD_NOT_ALLOWED,
                                      "Write method not allowed in working copy" );
         }
 
         String logicalResource = WorkingCopyPathUtil.getLogicalResource( continuumLocator.getResourcePath() );
         if ( logicalResource.startsWith( "/" ) )
         {
             logicalResource = logicalResource.substring( 1 );
         }
 
         File resourceFile = getResourceFile( continuumLocator.getProjectId(), logicalResource );
 
         if ( !resourceFile.exists() || ( continuumLocator.getHref( false ).endsWith( "/" ) &&
             !resourceFile.isDirectory() ) )
         {
             // force a resource not found
             log.error( "Resource file '" + resourceFile.getAbsolutePath() + "' does not exist" );
             throw new DavException( HttpServletResponse.SC_NOT_FOUND, "Resource does not exist" );
         }
         else
         {
             return createResource( resourceFile, logicalResource, request.getDavSession(), continuumLocator );
         }
     }
 
     public BuildAgentConfigurationService getBuildAgentConfigurationService()
     {
         return buildAgentConfigurationService;
     }
 
     public MimetypesFileTypeMap getMimeTypes()
     {
         return mimeTypes;
     }
 
     public void setBuildAgentConfigurationService( BuildAgentConfigurationService buildAgentConfigurationService )
     {
         this.buildAgentConfigurationService = buildAgentConfigurationService;
     }
 
     private ContinuumBuildAgentDavResourceLocator checkLocatorIsInstanceOfContinuumBuildAgentLocator(
         DavResourceLocator locator )
         throws DavException
     {
         if ( !( locator instanceof ContinuumBuildAgentDavResourceLocator ) )
         {
             throw new DavException( HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
                                     "Locator does not implement ContinuumBuildAgentLocator" );
         }
 
         // Hidden paths
         if ( locator.getResourcePath().startsWith( ContinuumBuildAgentDavResource.HIDDEN_PATH_PREFIX ) )
         {
             throw new DavException( HttpServletResponse.SC_NOT_FOUND );
         }
 
         ContinuumBuildAgentDavResourceLocator continuumLocator = (ContinuumBuildAgentDavResourceLocator) locator;
         if ( continuumLocator.getProjectId() <= 0 )
         {
             log.error( "Invalid project id: " + continuumLocator.getProjectId() );
             throw new DavException( HttpServletResponse.SC_NO_CONTENT );
         }
 
         return continuumLocator;
     }
 
     protected File getResourceFile( int projectId, String logicalResource )
     {
         File workingDir = buildAgentConfigurationService.getWorkingDirectory( projectId );
 
         return new File( workingDir, logicalResource );
     }
 
     protected DavResource createResource( File resourceFile, String logicalResource, DavSession session,
                                           ContinuumBuildAgentDavResourceLocator locator )
     {
         return new ContinuumBuildAgentDavResource( resourceFile.getAbsolutePath(), logicalResource, session, locator,
                                                    this, mimeTypes );
     }
 }