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/* SAMLAttributeStatement.cpp - SAML attribute statement implementation

   Scott Cantor
   5/23/02

   $History:$
*/

#include "internal.h"

using namespace saml;
using namespace std;


SAMLAttributeStatement::SAMLAttributeStatement(SAMLSubject* subject, const Iterator<SAMLAttribute*>& attributes)
{
    RTTI(SAMLAttributeStatement);
    if (!subject || attributes.size()==0)
        throw SAMLException(SAMLException::RESPONDER,"SAMLAttributeStatement() requires subject and at least one attribute");
    m_subject=subject;
    while (attributes.hasNext())
        m_attributes.push_back(attributes.next());
}

SAMLAttributeStatement::SAMLAttributeStatement(DOMElement* e) : m_subject(NULL)
{
    RTTI(SAMLAttributeStatement);
    fromDOM(e);
}

SAMLAttributeStatement::SAMLAttributeStatement(istream& in) : SAMLStatement(in), m_subject(NULL)
{
    RTTI(SAMLAttributeStatement);
    fromDOM(m_document->getDocumentElement());
}

SAMLAttributeStatement::~SAMLAttributeStatement()
{
    delete m_subject;
    for (vector<SAMLAttribute*>::const_iterator i=m_attributes.begin(); i!=m_attributes.end(); i++)
        delete (*i);
}

SAMLObject* SAMLAttributeStatement::clone() const
{
    return new SAMLAttributeStatement(static_cast<SAMLSubject*>(m_subject->clone()),getAttributes().clone());
}

void SAMLAttributeStatement::fromDOM(DOMElement* e)
{
    NDC ndc("fromDOM");
    SAMLObject::fromDOM(e);

    if (SAMLConfig::getConfig().strict_dom_checking)
    {
        if (XMLString::compareString(XML::SAML_NS,e->getNamespaceURI()))
            throw MalformedException(SAMLException::RESPONDER,"SAMLAttributeStatement::fromDOM() missing saml namespace on root element");

        if (XMLString::compareString(L(AttributeStatement),e->getLocalName()))
        {
            auto_ptr<saml::QName> type(saml::QName::getQNameAttribute(e,XML::XSI_NS,L(type)));
            if ((XMLString::compareString(L(Statement),e->getLocalName()) && XMLString::compareString(L(SubjectStatement),e->getLocalName())) ||
                    !type.get() || XMLString::compareString(XML::SAML_NS,type->getNamespaceURI()) ||
                    XMLString::compareString(L(AttributeStatementType),type->getLocalName()))
                throw MalformedException(SAMLException::RESPONDER, "SAMLAttributeStatement::fromDOM() requires saml:AttributeStatement at root");
        }
    }
    m_root=e;
    m_bOwnStrings=false;

    DOMNode* n=e->getFirstChild();
    while (n && n->getNodeType()!=DOMNode::ELEMENT_NODE)
        n=n->getNextSibling();

    m_subject=new SAMLSubject(static_cast<DOMElement*>(n));

    DOMNodeList* nlist = e->getElementsByTagNameNS(XML::SAML_NS,L(Attribute));
    for (int i=0; nlist && i<nlist->getLength(); i++)
    {
        DOMElement* a=static_cast<DOMElement*>(nlist->item(i));
        try
        {
            m_attributes.push_back(SAMLAttribute::getInstance(a));
        }
        catch (SAMLException& e)
        {
            SAML_log.warn("exception while instantiating a SAMLAttribute: %s",e.what());
        }
    }
}

DOMNode* SAMLAttributeStatement::toDOM(DOMDocument* doc, bool xmlns) const
{
    SAMLObject::toDOM(doc,xmlns);
    if (m_root)
    {
        if (xmlns)
        {
            static_cast<DOMElement*>(m_root)->setAttributeNS(XML::XMLNS_NS,L(xmlns),XML::SAML_NS);
            static_cast<DOMElement*>(m_root)->setAttributeNS(XML::XMLNS_NS,L_QNAME(xmlns,xsi),XML::XSI_NS);
            static_cast<DOMElement*>(m_root)->setAttributeNS(XML::XMLNS_NS,L_QNAME(xmlns,xsd),XML::XSD_NS);
        }
        return m_root;
    }

    if (m_attributes.empty())
        throw MalformedException(SAMLException::RESPONDER,"SAMLAttributeStatement::toDOM() requires at least one attribute");

    if (!doc)
        doc=m_document;

    // Construct an AttributeStatement.
    DOMElement* s=doc->createElementNS(XML::SAML_NS,L(AttributeStatement));
    if (xmlns)
        s->setAttributeNS(XML::XMLNS_NS,L(xmlns),XML::SAML_NS);
    s->appendChild(m_subject->toDOM(doc,false));

    for (vector<SAMLAttribute*>::const_iterator i=m_attributes.begin(); i!=m_attributes.end(); i++)
        s->appendChild((*i)->toDOM(doc,false));

    return m_root=s;
}