/*******************************************************************************
 * Copyright 2014 Federal Chancellery Austria
 * MOA-ID has been developed in a cooperation between BRZ, the Federal
 * Chancellery Austria - ICT staff unit, and Graz University of Technology.
 * 
 * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
 * the European Commission - subsequent versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * http://www.osor.eu/eupl/
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and
 * limitations under the Licence.
 * 
 * This product combines work with different licenses. See the "NOTICE" text
 * file for details on the various modules and licenses.
 * The "NOTICE" text file is part of the distribution. Any derivative works
 * that you distribute must include a readable copy of the "NOTICE" text file.
 ******************************************************************************/
/*
 * Copyright 2003 Federal Chancellery Austria
 * MOA-ID has been developed in a cooperation between BRZ, the Federal
 * Chancellery Austria - ICT staff unit, and Graz University of Technology.
 *
 * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
 * the European Commission - subsequent versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * http://www.osor.eu/eupl/
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and
 * limitations under the Licence.
 *
 * This product combines work with different licenses. See the "NOTICE" text
 * file for details on the various modules and licenses.
 * The "NOTICE" text file is part of the distribution. Any derivative works
 * that you distribute must include a readable copy of the "NOTICE" text file.
 */


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

import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;

import at.gv.egovernment.moa.id.auth.exception.BuildException;


/**
 * Builder for CreateXMLSignatureRequest to sign data from a foreign 
 * eID card.
 *  
 */

public class CreateXMLSignatureRequestBuilderForeign extends Builder {

  /** special tag in the XML template to be substituted for the KeyboxIdentifier */
  private static final String KEYBOXID_TAG = "<KEYBOXID>";
  /** special tag in the XML template to be substituted for the content */
  private static final String XMLCONTENT_TAG = "<XMLContent>";
  /** private static int all contains the representation to replace all tags*/
  private static final int ALL = -1;

//  /** default HTML template */
//  private static final String DEFAULT_XML_TEMPLATE = 
//	  "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" + 
//	  "<sl:CreateXMLSignatureRequest xmlns:sl=\"http://www.buergerkarte.at/namespaces/securitylayer/1.2#\">" + 
//	  "<sl:KeyboxIdentifier>" + KEYBOXID_TAG + "</sl:KeyboxIdentifier>" + 
//	  "<sl:DataObjectInfo Structure=\"enveloping\">" + 
//	  "<sl:DataObject>" +
//	  "<sl:XMLContent>" + XMLCONTENT_TAG + "</sl:XMLContent>" +
//	  "</sl:DataObject>" + 
//	  "<sl:TransformsInfo>" + 
//	  "<sl:FinalDataMetaInfo>" + 
//	  "<sl:MimeType>text/plain</sl:MimeType>" + 
//	  "</sl:FinalDataMetaInfo>" + 
//	  "</sl:TransformsInfo>" + 
//	  "</sl:DataObjectInfo>" +
//	  "</sl:CreateXMLSignatureRequest>";
  
  /** default HTML template */
  private static final String DEFAULT_XHTML_TEMPLATE = 
	  "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" + 
	  "<sl:CreateXMLSignatureRequest xmlns:sl=\"http://www.buergerkarte.at/namespaces/securitylayer/1.2#\">" + 
	  "<sl:KeyboxIdentifier>" + KEYBOXID_TAG + "</sl:KeyboxIdentifier>" + 
	  "<sl:DataObjectInfo Structure=\"enveloping\">" + 
	  "<sl:DataObject>" +
	  "<sl:XMLContent>" + XMLCONTENT_TAG + "</sl:XMLContent>" +
	  "</sl:DataObject>" + 
	  "<sl:TransformsInfo>" + 
	  "<sl:FinalDataMetaInfo>" + 
	  "<sl:MimeType>application/xhtml+xml</sl:MimeType>" + 
	  "</sl:FinalDataMetaInfo>" + 
	  "</sl:TransformsInfo>" + 
	  "</sl:DataObjectInfo>" +
	  "</sl:CreateXMLSignatureRequest>";
	  
  /**
   * Constructor for CreateXMLSignatureRequestBuilderForeign.
   */
  public CreateXMLSignatureRequestBuilderForeign() {
    super();
  }
  /**
   * Builds the XML request.
   * 
   * @param xmlRequest XML Request to be sent as a parameter in the form
   * @param bkuURL URL of the "B&uuml;rgerkartenumgebung" the form will be submitted to;
   *         may be <code>null</code>, in this case the default URL will be used
   * @param dataURL DataURL to be sent as a parameter in the form
   */
  public String build(
    String keyboxIdentifier, 
    String xmlContent)
  throws BuildException 
  {      
  	String xmlRequest = DEFAULT_XHTML_TEMPLATE;
  	xmlRequest = replaceTag(xmlRequest, KEYBOXID_TAG, keyboxIdentifier, true, ALL);
    //htmlForm = replaceTag(htmlForm, XMLREQUEST_TAG, encodeParameter(xmlRequest), true, ALL);
    xmlRequest = replaceTag(xmlRequest, XMLCONTENT_TAG, xmlContent, true, ALL);
  	return xmlRequest;
  }
  /**
   * Encodes a string for inclusion as a parameter in the form.
   * Double quotes are substituted by <code>"&amp;quot;"</code>.
   * @param s the string to be encoded
   * @return the string encoded
   * @throws BuildException on any exception encountered
   */
  public static String encodeParameter(String s) throws BuildException {
    StringReader in = new StringReader(s);
    StringWriter out = new StringWriter();
    try {
      for (int ch = in.read(); ch >= 0; ch = in.read()) {
        if (ch == '"')
          out.write("&quot;");
        else if (ch == '<')
          out.write("&lt;");
        else if (ch == '>')
          out.write("&gt;"); 
        else if (ch == 'ä')
          out.write("&auml;");
        else if (ch == 'ö')
          out.write("&ouml;");
        else if (ch == 'ü')
          out.write("&uuml;");
        else if (ch == 'Ä')
          out.write("&Auml;");
        else if (ch == 'Ö')
          out.write("&Ouml;");
        else if (ch == 'Ü')
          out.write("&Uuml;");
        else if (ch == 'ß')
          out.write("&szlig;");
        else
          out.write(ch);
      }
    }
    catch (IOException ex) {
      throw new BuildException("builder.00", new Object[] {"CreateXMLSignatureRequest", ex.toString()});
    }
    return out.toString();
  }

}