package at.gv.egovernment.moa.id.auth.builder;

import java.text.MessageFormat;

import at.gv.egovernment.moa.util.Constants;

/**
 * Builder for the <code>&lt;CreateXMLSignatureRequest&gt;</code> structure
 * used for requesting a signature under the authentication block from the 
 * security layer implementation.
 *
 * @author Paul Ivancsics
 * @version $Id$
 */
public class CreateXMLSignatureRequestBuilder implements Constants {
  /** private static String nl contains the NewLine representation in Java*/
  private static final String nl = "\n";
    /**
   * XML template for the <code>&lt;moa:CreateXMLSignatureRequest&gt;</code> to be built
   */
	private static final String CREATE_XML_SIGNATURE_REQUEST = 
		"<?xml version=\"1.0\" encoding=\"UTF-8\" ?>" + nl +
		"<sl11:CreateXMLSignatureRequest xmlns:dsig=''" + DSIG_NS_URI + "'' xmlns:sl10=''" + SL10_NS_URI + "'' xmlns:sl11=''" + SL11_NS_URI + "''>" + nl +
		" <sl11:KeyboxIdentifier>{1}</sl11:KeyboxIdentifier>" + nl +
		" <sl11:DataObjectInfo Structure=''detached''>" + nl +
		"  <sl10:DataObject Reference=''''/>" + nl +
		"{2}" +
		" </sl11:DataObjectInfo>" + nl +
		" <sl11:SignatureInfo>" + nl +
		"  <sl11:SignatureEnvironment>" + nl +
		"   <sl10:XMLContent>{0}</sl10:XMLContent>" + nl +
		"  </sl11:SignatureEnvironment>" + nl +
		"  <sl11:SignatureLocation Index=''2''>/saml:Assertion</sl11:SignatureLocation>" + nl +
		" </sl11:SignatureInfo>" + nl +
		"</sl11:CreateXMLSignatureRequest>";

  /**
   * Constructor for CreateXMLSignatureRequestBuilder.
   */
  public CreateXMLSignatureRequestBuilder() {
    super();
  }

	/**
	 * Builds the <code>&lt;CreateXMLSignatureRequest&gt;</code>.
	 * 
	 * @param authBlock String representation of XML authentication block
	 * @param keyBoxIdentfier the key box identifier which will be used (e.g. CertifiedKeypair)
	 * @return String representation of <code>&lt;CreateXMLSignatureRequest&gt;</code>
	 */
	public String build(String authBlock, String keyBoxIdentifier, String[] dsigTransformInfos) {
		String dsigTransformInfosString = "";
		for (int i = 0; i < dsigTransformInfos.length; i++)
      dsigTransformInfosString += dsigTransformInfos[i];
		String request = MessageFormat.format(
			CREATE_XML_SIGNATURE_REQUEST, new Object[] { authBlock, keyBoxIdentifier, dsigTransformInfosString });
		return request;
	}
}