/*
    * Copyright 2012 The Netty Project
    *
    * The Netty Project 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:
    *
    *   https://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 io.netty.handler.codec.http.multipart;
  
  import io.netty.buffer.ByteBuf;
  import io.netty.channel.ChannelException;
  import io.netty.handler.codec.http.HttpHeaderNames;
  import io.netty.handler.codec.http.HttpHeaderValues;
  
  import java.io.File;
  import java.io.IOException;
  import java.nio.charset.Charset;
  
  /**
   * Disk FileUpload implementation that stores file into real files
   */
  public class DiskFileUpload extends AbstractDiskHttpData implements FileUpload {
      public static String baseDirectory;
  
      public static boolean deleteOnExitTemporaryFile = true;
  
      public static final String prefix = "FUp_";
  
      public static final String postfix = ".tmp";
  
      private final String baseDir;
  
      private final boolean deleteOnExit;
  
      private String filename;
  
      private String contentType;
  
      private String contentTransferEncoding;
  
      public DiskFileUpload(String name, String filename, String contentType,
              String contentTransferEncoding, Charset charset, long size, String baseDir, boolean deleteOnExit) {
          super(name, charset, size);
          setFilename(filename);
          setContentType(contentType);
          setContentTransferEncoding(contentTransferEncoding);
          this.baseDir = baseDir == null ? baseDirectory : baseDir;
          this.deleteOnExit = deleteOnExit;
      }
  
      public DiskFileUpload(String name, String filename, String contentType,
              String contentTransferEncoding, Charset charset, long size) {
          this(name, filename, contentType, contentTransferEncoding,
                  charset, size, baseDirectory, deleteOnExitTemporaryFile);
      }
  
      @Override
      public HttpDataType getHttpDataType() {
          return HttpDataType.FileUpload;
      }
  
      @Override
      public String getFilename() {
          return filename;
      }
  
      @Override
      public void setFilename(String filename) {
          this.filename = FileUploadUtil.validateFileNameForMultiPart(filename);
      }
  
      @Override
      public int hashCode() {
          return FileUploadUtil.hashCode(this);
      }
  
      @Override
      public boolean equals(Object o) {
          return o instanceof FileUpload && FileUploadUtil.equals(this, (FileUpload) o);
      }
  
      @Override
      public int compareTo(InterfaceHttpData o) {
          if (!(o instanceof FileUpload)) {
              throw new ClassCastException("Cannot compare " + getHttpDataType() +
                      " with " + o.getHttpDataType());
          }
          return compareTo((FileUpload) o);
      }
  
      public int compareTo(FileUpload o) {
         return FileUploadUtil.compareTo(this, o);
     }
 
     @Override
     public void setContentType(String contentType) {
         this.contentType = FileUploadUtil.validateContentTypeForMultiPart(contentType);
     }
 
     @Override
     public String getContentType() {
         return contentType;
     }
 
     @Override
     public String getContentTransferEncoding() {
         return contentTransferEncoding;
     }
 
     @Override
     public void setContentTransferEncoding(String contentTransferEncoding) {
         this.contentTransferEncoding = contentTransferEncoding;
     }
 
     @Override
     public String toString() {
         File file = null;
         try {
             file = getFile();
         } catch (IOException e) {
             // Should not occur.
         }
 
         return HttpHeaderNames.CONTENT_DISPOSITION + ": " +
                HttpHeaderValues.FORM_DATA + "; " + HttpHeaderValues.NAME + "=\"" + getName() +
                 "\"; " + HttpHeaderValues.FILENAME + "=\"" + filename + "\"\r\n" +
                 HttpHeaderNames.CONTENT_TYPE + ": " + contentType +
                 (getCharset() != null? "; " + HttpHeaderValues.CHARSET + '=' + getCharset().name() + "\r\n" : "\r\n") +
                 HttpHeaderNames.CONTENT_LENGTH + ": " + length() + "\r\n" +
                 "Completed: " + isCompleted() +
                 "\r\nIsInMemory: " + isInMemory() + "\r\nRealFile: " +
                 (file != null ? file.getAbsolutePath() : "null") + " DeleteAfter: " + deleteOnExit;
     }
 
     @Override
     protected boolean deleteOnExit() {
         return deleteOnExit;
     }
 
     @Override
     protected String getBaseDirectory() {
         return baseDir;
     }
 
     @Override
     protected String getDiskFilename() {
         return "upload";
     }
 
     @Override
     protected String getPostfix() {
         return postfix;
     }
 
     @Override
     protected String getPrefix() {
         return prefix;
     }
 
     @Override
     public FileUpload copy() {
         final ByteBuf content = content();
         return replace(content != null ? content.copy() : null);
     }
 
     @Override
     public FileUpload duplicate() {
         final ByteBuf content = content();
         return replace(content != null ? content.duplicate() : null);
     }
 
     @Override
     public FileUpload retainedDuplicate() {
         ByteBuf content = content();
         if (content != null) {
             content = content.retainedDuplicate();
             boolean success = false;
             try {
                 FileUpload duplicate = replace(content);
                 success = true;
                 return duplicate;
             } finally {
                 if (!success) {
                     content.release();
                 }
             }
         } else {
             return replace(null);
         }
     }
 
     @Override
     public FileUpload replace(ByteBuf content) {
         DiskFileUpload upload = new DiskFileUpload(
                 getName(), getFilename(), getContentType(), getContentTransferEncoding(), getCharset(), size,
                 baseDir, deleteOnExit);
         if (content != null) {
             try {
                 upload.setContent(content);
             } catch (IOException e) {
                 throw new ChannelException(e);
             }
         }
         upload.setCompleted(isCompleted());
         return upload;
     }
 
     @Override
     public FileUpload retain(int increment) {
         super.retain(increment);
         return this;
     }
 
     @Override
     public FileUpload retain() {
         super.retain();
         return this;
     }
 
     @Override
     public FileUpload touch() {
         super.touch();
         return this;
     }
 
     @Override
     public FileUpload touch(Object hint) {
         super.touch(hint);
         return this;
     }
 }