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package com.sap.cmclient.http;

import java.net.URI;

import org.apache.http.HttpHeaders;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;

public class TransportRequestBuilder
{

  private final URI endpoint;
  private static final String SEPARATOR = "/";
  private static final String TRANSPORTS = "Transports";
  private static final String SINGLE_QUOTE_URL_ESCAPED = "%27";

  public TransportRequestBuilder(URI endpoint)
  {
    this.endpoint = endpoint;
  }

  public HttpGet getTransport(String id)
  {
    HttpGet get = new HttpGet(createTransportUri(id, null));
    return get;
  }

  public HttpPost createTransport()
  {
    HttpPost post = new HttpPost(createTransportUri(null, null));
    post.addHeader(HttpHeaders.CONTENT_TYPE, "application/xml");
    return post;

  }

  public HttpPut updateTransport(String id)
  {
    
    HttpPut put = new HttpPut(createTransportUri(id,null));
    put.addHeader(HttpHeaders.CONTENT_TYPE, "application/xml");
    return put;

  }

  public HttpDelete deleteTransport(String id)
  {
    HttpDelete delete = new HttpDelete(createTransportUri(id, null));
    return delete;

  }

  public HttpPost upload(String transportId) {
      return new HttpPost(endpoint + "/" + getEntityKey() + "('" + transportId + "')/File");
  }

  public HttpGet exportTransport(String transportId) {
      return new HttpGet(endpoint + "/ExportTransport?id=" + SINGLE_QUOTE_URL_ESCAPED + transportId + SINGLE_QUOTE_URL_ESCAPED);
  }

  public HttpGet importTransport(String systemId, String transportId) {
      return new HttpGet(endpoint + "/ImportTransport?id=" + SINGLE_QUOTE_URL_ESCAPED + transportId + SINGLE_QUOTE_URL_ESCAPED +
                                                    "&system=" + SINGLE_QUOTE_URL_ESCAPED + systemId + SINGLE_QUOTE_URL_ESCAPED);
  }

  private String createTransportUri(String id, String expand)
  {
    final StringBuilder absolutUri = new StringBuilder(endpoint.toASCIIString()).append(SEPARATOR)
      .append(TRANSPORTS);
    if (id != null) {
      absolutUri.append("('").append(id).append("')");
    }
    if (expand != null) {
      absolutUri.append("/?$expand=").append(expand);
    }
    return absolutUri.toString();
  }

  public static String getEntityKey()
  {
    return TRANSPORTS;
  }

}