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/*
Copyright 2011 Selenium committers
Copyright 2011 Software Freedom Conservancy

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 org.openqa.grid.internal;

import org.openqa.grid.internal.exception.NewSessionException;

public class ExternalSessionKey {

  private final String key;

  public ExternalSessionKey(String key) {
    this.key = key;
  }

  @Override
  public boolean equals(Object o) {
    if (this == o) {
      return true;
    }
    if (o == null || getClass() != o.getClass()) {
      return false;
    }

    ExternalSessionKey that = (ExternalSessionKey) o;

    return key.equals(that.key);

  }

  public String getKey() {
    return key;
  }

  @Override
  public String toString() {
    return getKey();
  }

  @Override
  public int hashCode() {
    return key.hashCode();
  }
  
  public static ExternalSessionKey fromSe1Request(String piece){
    if (piece.startsWith("sessionId=")) {
      return new ExternalSessionKey(piece.replace("sessionId=", ""));
    }
    return null;
  }
  
  /**
   * extract the session xxx from http://host:port/a/b/c/session/xxx/...
   *
   * @param path The path to the session
   * @return the ExternalSessionKey provided by the remote., or null if the url didn't contain a session id
   */
  public static ExternalSessionKey fromWebDriverRequest(String path){
      int sessionIndex = path.indexOf("/session/");
      if (sessionIndex != -1) {
        sessionIndex += "/session/".length();
        int nextSlash = path.indexOf("/", sessionIndex);
        String session;
        if (nextSlash != -1) {
          session = path.substring(sessionIndex, nextSlash);
        } else {
          session = path.substring(sessionIndex, path.length());
        }
        if ("".equals(session)) {
          return null;
        }
        return new ExternalSessionKey(session);
      }
      return null;
  }
  
  /**
   * extract the external key from the server response for a selenium1 new session request.
   * @param responseBody the response from the server
   * @return the ExternalKey if it was present in the server's response.
   * @throws NewSessionException in case the server didn't send back a success result.
   */
  public static ExternalSessionKey fromResponseBody(String responseBody) throws NewSessionException {
    if (responseBody != null && responseBody.startsWith("OK,")) {
      return new ExternalSessionKey(responseBody.replace("OK,", ""));
    }else {
      throw new NewSessionException("The server returned an error : "+responseBody);
    }
    
  }

  public static ExternalSessionKey fromString(String keyString){
    return new ExternalSessionKey(keyString);
  }

  public static ExternalSessionKey fromJSON(String keyString){
    return new ExternalSessionKey(keyString);
  }

}