/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 1999 The Apache Software Foundation.  All rights 
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:  
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "<WebSig>" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written 
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation and was
 * originally based on software copyright (c) 2001, Institute for
 * Data Communications Systems, <http://www.nue.et-inf.uni-siegen.de/>.
 * The development of this software was partly funded by the European 
 * Commission in the <WebSig> project in the ISIS Programme. 
 * For more information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

/*
 * XSEC
 *
 * XSECDOMUtils:= Utilities to manipulate DOM within XML-SECURITY
 *
 * Author(s): Berin Lautenbach
 *
 * $ID$
 *
 * $LOG$
 *
 */

// XSEC

#include <xsec/utils/XSECDOMUtils.hpp>

// Xerces

#include <xercesc/util/XMLUniDefs.hpp>
// --------------------------------------------------------------------------------
//           Utilities to manipulate DSIG namespaces
// --------------------------------------------------------------------------------

const XMLCh * getDSIGLocalName(const DOMNode *node) {

	if (!strEquals(node->getNamespaceURI(), DSIGConstants::s_unicodeStrURIDSIG))
		return NULL; //DOMString("");
	else
		return node->getLocalName();

}

const XMLCh * getECLocalName(const DOMNode * node) {

	// Exclusive Canonicalisation namespace
	// Probably should have a generic function

	if (!strEquals(node->getNamespaceURI(), DSIGConstants::s_unicodeStrURIEC))
		return NULL;
	else
		return node->getLocalName();

}

const XMLCh * getXPFLocalName(const DOMNode * node) {

	// XPath Filter namespace

	if (!strEquals(node->getNamespaceURI(), DSIGConstants::s_unicodeStrURIXPF))
		return NULL;
	else
		return node->getLocalName();

}

// --------------------------------------------------------------------------------
//           Find a nominated DSIG node in a document
// --------------------------------------------------------------------------------

DOMNode *findDSIGNode(DOMNode *n, char * nodeName) {

	const XMLCh * name = getDSIGLocalName(n);

	if (strEquals(name, nodeName)) {

		return n;

	}

	DOMNode *child = n->getFirstChild();

	while (child != NULL) {

		DOMNode *ret = findDSIGNode(child, nodeName);
		if (ret != NULL)
			return ret;
		child = child->getNextSibling();

	}

	return child;

}

// --------------------------------------------------------------------------------
//           Find particular type of node child
// --------------------------------------------------------------------------------

DOMNode *findFirstChildOfType(DOMNode *n, DOMNode::NodeType t) {

	DOMNode *c;

	if (n == NULL) 
		return n;

	c = n->getFirstChild();

	while (c != NULL && c->getNodeType() != t)
		c = c->getNextSibling();

	return c;

}

// --------------------------------------------------------------------------------
//           Make a QName
// --------------------------------------------------------------------------------

safeBuffer &makeQName(safeBuffer & qname, safeBuffer &prefix, char * localName) {

	if (prefix[0] == '\0') {
		qname = localName;
	}
	else {
		qname = prefix;
		qname.sbStrcatIn(":");
		qname.sbStrcatIn(localName);
	}

	return qname;

}
safeBuffer &makeQName(safeBuffer & qname, const XMLCh *prefix, char * localName) {

	if (prefix == NULL || prefix[0] == 0) {
		qname.sbTranscodeIn(localName);
	}
	else {
		qname.sbXMLChIn(prefix);
		qname.sbXMLChAppendCh(XERCES_CPP_NAMESPACE_QUALIFIER chColon);
		qname.sbXMLChCat(localName);	// Will transcode
	}

	return qname;
}

// --------------------------------------------------------------------------------
//           "Quick" Transcode (low performance)
// --------------------------------------------------------------------------------



XMLT::XMLT(const char * str) {

	mp_unicodeStr = XMLString::transcode(str);

}

XMLT::~XMLT (void) {

	delete[] mp_unicodeStr;

}

XMLCh * XMLT::getUnicodeStr(void) {
	
	return mp_unicodeStr;

}

// --------------------------------------------------------------------------------
//           Gather text from children
// --------------------------------------------------------------------------------

void gatherChildrenText(DOMNode * parent, safeBuffer &output) {

	DOMNode * c = parent->getFirstChild();

	output.sbXMLChIn(DSIGConstants::s_unicodeStrEmpty);

	while (c != NULL) {

		if (c->getNodeType() == DOMNode::TEXT_NODE)
			output.sbXMLChCat(c->getNodeValue());

		c = c->getNextSibling();

	}

}