/*
    * ====================================================================
    * 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  
  package org.apache.http.entity.mime;
  
  import java.io.File;
  import java.io.InputStream;
  import java.nio.charset.Charset;
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.http.entity.ContentType;
  import org.apache.http.entity.mime.content.ByteArrayBody;
  import org.apache.http.entity.mime.content.FileBody;
  import org.apache.http.entity.mime.content.InputStreamBody;
  import org.apache.http.entity.mime.content.StringBody;
  import org.apache.http.util.Args;
  
  /**
   * @since 4.3
   */
  public class MultipartEntityBuilder {
  
      private boolean lax;
      private String boundary;
      private Charset charset;
      private List<FormBodyPart> bodyParts;
  
      public static MultipartEntityBuilder create() {
          return new MultipartEntityBuilder();
      }
  
      MultipartEntityBuilder() {
          super();
      }
  
      public MultipartEntityBuilder setLaxMode() {
          this.lax = true;
          return this;
      }
  
      public MultipartEntityBuilder setStrictMode() {
          this.lax = false;
          return this;
      }
  
      public MultipartEntityBuilder setBoundary(final String boundary) {
          this.boundary = boundary;
          return this;
      }
  
      public MultipartEntityBuilder setCharset(final Charset charset) {
          this.charset = charset;
          return this;
      }
  
      public MultipartEntityBuilder addTextBody(
              final String name, final String text, final ContentType contentType) {
          Args.notNull(name, "Name");
          Args.notNull(text, "Text");
          if (this.bodyParts == null) {
              this.bodyParts = new ArrayList<FormBodyPart>();
          }
          this.bodyParts.add(new FormBodyPart(name, new StringBody(text, contentType)));
          return this;
      }
  
      public MultipartEntityBuilder addTextBody(
              final String name, final String text) {
          return addTextBody(name, text, ContentType.DEFAULT_TEXT);
      }
  
      public MultipartEntityBuilder addBinaryBody(
              final String name, final byte[] b, final ContentType contentType, final String filename) {
          if (this.bodyParts == null) {
             this.bodyParts = new ArrayList<FormBodyPart>();
         }
         this.bodyParts.add(new FormBodyPart(name, new ByteArrayBody(b, contentType, filename)));
         return this;
     }
 
     public MultipartEntityBuilder addBinaryBody(
             final String name, final byte[] b) {
         return addBinaryBody(name, b, ContentType.DEFAULT_BINARY, null);
     }
 
     public MultipartEntityBuilder addBinaryBody(
             final String name, final File file, final ContentType contentType, final String filename) {
         if (this.bodyParts == null) {
             this.bodyParts = new ArrayList<FormBodyPart>();
         }
         this.bodyParts.add(
                 new FormBodyPart(name, new FileBody(file, contentType, filename)));
         return this;
     }
 
     public MultipartEntityBuilder addBinaryBody(
             final String name, final File file) {
         return addBinaryBody(name, file, ContentType.DEFAULT_BINARY, null);
     }
 
     public MultipartEntityBuilder addBinaryBody(
             final String name, final InputStream stream, final ContentType contentType,
             final String filename) {
         if (this.bodyParts == null) {
             this.bodyParts = new ArrayList<FormBodyPart>();
         }
         this.bodyParts.add(
                 new FormBodyPart(name, new InputStreamBody(stream, contentType, filename)));
         return this;
     }
 
     public MultipartEntityBuilder addBinaryBody(final String name, final InputStream stream) {
         return addBinaryBody(name, stream, ContentType.DEFAULT_BINARY, null);
     }
 
     public MultipartEntity build() {
         final MultipartEntity e = new MultipartEntity(
                 this.lax ? HttpMultipartMode.BROWSER_COMPATIBLE : HttpMultipartMode.STRICT,
                 this.boundary, this.charset);
         if (this.bodyParts != null) {
             for (final FormBodyPart bp: this.bodyParts) {
                 e.addPart(bp);
             }
         }
         return e;
     }
 
 }