/*
    * 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.commons.vfs2.provider.webdav;
  
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.Collections;
  
  import org.apache.commons.httpclient.HttpClient;
  import org.apache.commons.vfs2.Capability;
  import org.apache.commons.vfs2.FileName;
  import org.apache.commons.vfs2.FileObject;
  import org.apache.commons.vfs2.FileSystem;
  import org.apache.commons.vfs2.FileSystemConfigBuilder;
  import org.apache.commons.vfs2.FileSystemException;
  import org.apache.commons.vfs2.FileSystemOptions;
  import org.apache.commons.vfs2.UserAuthenticationData;
  import org.apache.commons.vfs2.provider.GenericFileName;
  import org.apache.commons.vfs2.provider.http.HttpClientFactory;
  import org.apache.commons.vfs2.provider.http.HttpFileProvider;
  import org.apache.commons.vfs2.util.UserAuthenticatorUtils;
  
  /**
   * A provider for WebDAV.
   *
   * @since 2.0
   */
  public class WebdavFileProvider extends HttpFileProvider {
  
      /**
       * The authenticator types used by the WebDAV provider.
       *
       * @deprecated Might be removed in the next major version.
       */
      @Deprecated
      public static final UserAuthenticationData.Type[] AUTHENTICATOR_TYPES = {
              UserAuthenticationData.USERNAME, UserAuthenticationData.PASSWORD };
  
      /** The capabilities of the WebDAV provider */
      protected static final Collection<Capability> capabilities = Collections
              .unmodifiableCollection(Arrays.asList(Capability.CREATE, Capability.DELETE, Capability.RENAME, Capability.GET_TYPE,
                      Capability.LIST_CHILDREN, Capability.READ_CONTENT, Capability.URI, Capability.WRITE_CONTENT,
                      Capability.GET_LAST_MODIFIED, Capability.ATTRIBUTES, Capability.RANDOM_ACCESS_READ,
                      Capability.DIRECTORY_READ_CONTENT));
  
      /**
       * Constructs a new instance.
       */
      public WebdavFileProvider() {
          setFileNameParser(WebdavFileNameParser.getInstance());
      }
  
      /**
       * Creates a {@link FileSystem}.
       * <p>
       * If you're looking at this method and wondering how to get a FileSystemOptions object bearing the proxy host and
       * credentials configuration through to this method so it's used for resolving a
       * {@link org.apache.commons.vfs2.FileObject FileObject} in the FileSystem, then be sure to use correct signature of
       * the {@link org.apache.commons.vfs2.FileSystemManager FileSystemManager} resolveFile method.
       * </p>
       *
       * @see org.apache.commons.vfs2.impl.DefaultFileSystemManager#resolveFile(FileObject, String, FileSystemOptions)
       */
      @Override
      protected FileSystem doCreateFileSystem(final FileName name, final FileSystemOptions fileSystemOptions)
              throws FileSystemException {
          // Create the file system
          final GenericFileName rootName = (GenericFileName) name;
          final FileSystemOptions fsOpts = fileSystemOptions == null ? new FileSystemOptions() : fileSystemOptions;
  
          UserAuthenticationData authData = null;
          HttpClient httpClient;
          try {
              authData = UserAuthenticatorUtils.authenticate(fsOpts, AUTHENTICATOR_TYPES);
  
              httpClient = HttpClientFactory.createConnection(WebdavFileSystemConfigBuilder.getInstance(), "http",
                      rootName.getHostName(), rootName.getPort(),
                      UserAuthenticatorUtils.toString(UserAuthenticatorUtils.getData(authData,
                              UserAuthenticationData.USERNAME, UserAuthenticatorUtils.toChar(rootName.getUserName()))),
                      UserAuthenticatorUtils.toString(UserAuthenticatorUtils.getData(authData,
                              UserAuthenticationData.PASSWORD, UserAuthenticatorUtils.toChar(rootName.getPassword()))),
                      fsOpts);
          } finally {
              UserAuthenticatorUtils.cleanup(authData);
          }
 
         return new WebdavFileSystem(rootName, httpClient, fsOpts);
     }
 
     @Override
     public Collection<Capability> getCapabilities() {
         return capabilities;
     }
 
     @Override
     public FileSystemConfigBuilder getConfigBuilder() {
         return WebdavFileSystemConfigBuilder.getInstance();
     }
 }