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/*
 * Copyright 2011-2024 GatlingCorp (https://gatling.io)
 *
 * Licensed 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 io.gatling.http.client.body.stringchunks;

import io.gatling.http.client.body.RequestBody;
import io.gatling.http.client.body.RequestBodyBuilder;
import io.gatling.http.client.body.WritableContent;
import io.gatling.netty.util.StringWithCachedBytes;
import io.netty.buffer.ByteBufAllocator;
import java.nio.charset.Charset;
import java.util.List;

public final class StringChunksRequestBody extends RequestBody.Base> {

  private final Charset charset;
  private final long contentLength;

  public StringChunksRequestBody(List content, Charset charset) {
    super(content);
    long contentLength = 0;
    for (StringWithCachedBytes stringWithCachedBytes : content) {
      contentLength += stringWithCachedBytes.bytes.length;
    }
    this.contentLength = contentLength;
    this.charset = charset;
  }

  @Override
  public WritableContent build(ByteBufAllocator alloc) {
    return new WritableContent(StringWithCachedBytes.toByteBuf(content), contentLength);
  }

  @Override
  public RequestBodyBuilder newBuilder() {
    return new StringChunksRequestBodyBuilder(content);
  }

  @Override
  public byte[] getBytes() {
    byte[] bytes = new byte[(int) contentLength];
    int offset = 0;
    for (StringWithCachedBytes chunk : content) {
      System.arraycopy(chunk.bytes, 0, bytes, offset, chunk.bytes.length);
      offset += chunk.bytes.length;
    }
    return bytes;
  }

  @Override
  public String print(int maxLength) {
    return "StringChunksRequestBody{"
        + "charset="
        + charset
        + ", content="
        + truncate(StringWithCachedBytes.toString(content), maxLength)
        + '}';
  }
}