content: /*
   * This library is part of OpenCms -
   * the Open Source Content Management System
   *
   * Copyright (c) Alkacon Software GmbH & Co. KG (https://www.alkacon.com)
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
   * Lesser General Public License for more details.
   *
   * For further information about Alkacon Software, please see the
   * company website: https://www.alkacon.com
   *
   * For further information about OpenCms, please see the
   * project website: https://www.opencms.org
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   */
  
  package org.opencms.ade.upload;
  
  import org.opencms.file.CmsObject;
  import org.opencms.file.CmsResource;
  import org.opencms.file.CmsResourceFilter;
  import org.opencms.gwt.CmsGwtService;
  import org.opencms.gwt.shared.CmsUploadFileBean;
  import org.opencms.gwt.shared.CmsUploadProgessInfo;
  import org.opencms.gwt.shared.CmsUploadProgessInfo.UPLOAD_STATE;
  import org.opencms.gwt.shared.rpc.I_CmsUploadService;
  import org.opencms.main.CmsException;
  import org.opencms.util.CmsUUID;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.commons.fileupload.InvalidFileNameException;
  import org.apache.commons.fileupload.util.Streams;
  
  /**
   * Handles all RPC services related to the upload dialog.<p>
   *
   * @since 8.0.0
   *
   * @see org.opencms.ade.upload.CmsUploadService
   * @see org.opencms.gwt.shared.rpc.I_CmsUploadService
   * @see org.opencms.gwt.shared.rpc.I_CmsUploadServiceAsync
   */
  public class CmsUploadService extends CmsGwtService implements I_CmsUploadService {
  
      /** The serial version UID. */
      private static final long serialVersionUID = -2235662141861687012L;
  
      /**
       * @see org.opencms.gwt.shared.rpc.I_CmsUploadService#cancelUpload()
       */
      public Boolean cancelUpload() {
  
          if (getRequest().getSession().getAttribute(CmsUploadBean.SESSION_ATTRIBUTE_LISTENER_ID) != null) {
              CmsUUID listenerId = (CmsUUID)getRequest().getSession().getAttribute(
                  CmsUploadBean.SESSION_ATTRIBUTE_LISTENER_ID);
              CmsUploadListener listener = CmsUploadBean.getCurrentListener(listenerId);
              if ((listener != null) && !listener.isCanceled()) {
                  listener.cancelUpload(
                      new CmsUploadException(Messages.get().getBundle().key(Messages.ERR_UPLOAD_USER_CANCELED_0)));
                  return Boolean.TRUE;
              }
          }
          return Boolean.FALSE;
      }
  
      /**
       * @see org.opencms.gwt.shared.rpc.I_CmsUploadService#checkUploadFiles(java.util.List, java.lang.String, boolean)
       */
      public CmsUploadFileBean checkUploadFiles(List<String> fileNames, String targetFolder, boolean isRootPath) {
  
          List<String> existingResourceNames = new ArrayList<String>();
          List<String> invalidFileNames = new ArrayList<String>();
          List<String> existingDeleted = new ArrayList<String>();
          boolean isActive = false;
  
          // check if there is an active upload
          if (getRequest().getSession().getAttribute(CmsUploadBean.SESSION_ATTRIBUTE_LISTENER_ID) == null) {
  
              // check for existing files
              for (String fileName : fileNames) {
  
                  try {
                      Streams.checkFileName(fileName);
                      String newResName = CmsUploadBean.getNewResourceName(getCmsObject(), fileName, targetFolder, false);
                      if (existsResource(newResName, isRootPath)) {
                          if (isDeletedResource(newResName, isRootPath)) {
                              existingDeleted.add(fileName);
                          } else {
                              existingResourceNames.add(fileName);
                          }
                      }
                  } catch (InvalidFileNameException e) {
                      invalidFileNames.add(fileName);
                  }
              }
          } else {
              isActive = true;
          }
          return new CmsUploadFileBean(existingResourceNames, invalidFileNames, existingDeleted, isActive);
      }
  
      /**
       * @see org.opencms.gwt.shared.rpc.I_CmsUploadService#getUploadProgressInfo()
       */
      public CmsUploadProgessInfo getUploadProgressInfo() {
  
          CmsUploadProgessInfo info = new CmsUploadProgessInfo(0, 0, UPLOAD_STATE.notStarted, 0, 0);
          if (getRequest().getSession().getAttribute(CmsUploadBean.SESSION_ATTRIBUTE_LISTENER_ID) != null) {
              CmsUUID listenerId = (CmsUUID)getRequest().getSession().getAttribute(
                  CmsUploadBean.SESSION_ATTRIBUTE_LISTENER_ID);
              CmsUploadListener listener = CmsUploadBean.getCurrentListener(listenerId);
              if (listener != null) {
                  info = listener.getInfo();
              }
          }
          return info;
      }
  
      /**
       * Checks if a resource already exists for the given path.<p>
       *
       * @param path the path
       * @param rootPath in case the path is a root path
       *
       * @return true if a resource already exists
       */
      private boolean existsResource(String path, boolean rootPath) {
  
          CmsObject cms = getCmsObject();
          if (rootPath) {
              String origSiteRoot = cms.getRequestContext().getSiteRoot();
              try {
                  cms.getRequestContext().setSiteRoot("");
                  if (cms.existsResource(path, CmsResourceFilter.ALL)) {
                      return true;
                  }
              } finally {
                  cms.getRequestContext().setSiteRoot(origSiteRoot);
              }
          } else {
              if (cms.existsResource(path, CmsResourceFilter.ALL)) {
                  return true;
              }
          }
          return false;
      }
  
      /**
       * Checks if a the resource exists but is marked as deleted.<p>
       *
       * @param path the path
       * @param rootPath in case the path is a root path
       *
       * @return true is the resource exists but is marked as deleted
       */
      private boolean isDeletedResource(String path, boolean rootPath) {
  
          CmsObject cms = getCmsObject();
          CmsResource res = null;
          try {
              if (rootPath) {
                  String origSiteRoot = cms.getRequestContext().getSiteRoot();
                  try {
                      cms.getRequestContext().setSiteRoot("");
                      res = cms.readResource(path, CmsResourceFilter.ALL);
  
                  } finally {
                      cms.getRequestContext().setSiteRoot(origSiteRoot);
                  }
              } else {
                  res = cms.readResource(path, CmsResourceFilter.ALL);
              }
          } catch (CmsException e) {
              // ignore
          }
          return (res != null) && res.getState().isDeleted();
      }
  }
  