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/*
 * Copyright (C) 2015 Red Hat, Inc.
 *
 * 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.fabric8.kubernetes.client.server.mock;

import io.fabric8.kubernetes.api.model.Status;
import io.fabric8.kubernetes.api.model.StatusBuilder;
import io.fabric8.kubernetes.client.utils.Serialization;
import io.fabric8.mockwebserver.internal.WebSocketMessage;

import java.nio.charset.StandardCharsets;

/**
 * {@link WebSocketMessage} that outputs a {@link Status} message.
 */
public class StatusMessage extends WebSocketMessage {

  private static final byte ERROR_CHANNEL_STREAM_ID = 3;

  /**
   * Create websocket message that returns {@link Status} on the error channel.
   * 
   * @param status status response
   */
  public StatusMessage(Status status) {
    super(0L, getBodyBytes(ERROR_CHANNEL_STREAM_ID, status), true, true);
  }

  /**
   * Create websocket message that returns a {@link Status} with the given status code
   * on the error channel.
   * 
   * @param exitCode exit code
   */
  public StatusMessage(int exitCode) {
    this(new StatusBuilder()
        .withCode(exitCode)
        .withStatus(exitCode == 0 ? "Success" : "Failure")
        .build());
  }

  private static byte[] getBodyBytes(byte prefix, Status status) {
    byte[] original = Serialization.asJson(status).getBytes(StandardCharsets.UTF_8);
    byte[] prefixed = new byte[original.length + 1];
    prefixed[0] = prefix;
    System.arraycopy(original, 0, prefixed, 1, original.length);
    return prefixed;
  }
}