#include "xmlPresenter.h"
#include "xmlObjectLoader.h"
#include "variables.h"
#include "appEngine.h"
#include <libxml++/document.h>

DECLARE_COMPONENT_LOADER("xml", XmlPresenter, PresenterLoader)

XmlPresenter::XmlPresenter(const Glib::ustring & responseRootNodeName, const Glib::ustring & responseStyle, const Glib::ustring & ct) :
	ContentPresenter(ct),
	responseDoc(XmlDocumentPtr(new xmlpp::Document("1.0")))
{
	createDoc(responseRootNodeName, responseStyle);
}

XmlPresenter::XmlPresenter(const xmlpp::Element * e) :
	ContentPresenter(e->get_attribute_value("contenttype")),
	responseDoc(XmlDocumentPtr(new xmlpp::Document("1.0")))
{
	createDoc(e->get_attribute_value("root"), e->get_attribute_value("style"));
}

XmlPresenter::~XmlPresenter()
{
}

void
XmlPresenter::createDoc(const Glib::ustring & responseRootNodeName, const Glib::ustring & responseStyle) const
{
	nodeStack.push_back(responseDoc->create_root_node(responseRootNodeName));
	declareNamespace(Environment::getCurrent()->getXmlPrefix(),
			Environment::getCurrent()->getXmlNamespace());
	// XSLT Style
	char * buf;
	if (!responseStyle.empty() && asprintf(&buf, "type=\"text/xsl\" href=\"%s\"",
				responseStyle.c_str()) > 0) {
		xmlAddPrevSibling(nodeStack.back()->cobj(),
				xmlNewDocPI(responseDoc->cobj(), BAD_CAST "xml-stylesheet", BAD_CAST buf));
		free(buf);
	}
}

XmlPresenter::operator const xmlpp::Document * () const
{
	return responseDoc.get();
}

XmlPresenter::operator const xmlDoc * () const
{
	return responseDoc->cobj();
}

void
XmlPresenter::declareNamespace(const Glib::ustring & prefix, const Glib::ustring & ns) const
{
	xmlNewNs(nodeStack.back()->cobj(), BAD_CAST ns.c_str(), BAD_CAST prefix.c_str());
}

void
XmlPresenter::setNamespace(const Glib::ustring & prefix, const Glib::ustring & ns) const
{
	nodeStack.back()->set_namespace_declaration(ns, prefix);
}

void
XmlPresenter::pushSub(const Glib::ustring & name, const Glib::ustring & ns) const
{
	nodeStack.push_back(nodeStack.back()->add_child(name, ns));
}

void
XmlPresenter::addAttr(const Glib::ustring & name, const Glib::ustring & ns, const VariableType & value) const
{
	if (!value.get<Null>()) {
		nodeStack.back()->set_attribute(name, value, ns);
	}
}

void
XmlPresenter::addText(const VariableType & value) const
{
	if (!value.get<Null>()) {
		nodeStack.back()->add_child_text(value);
	}
}

void
XmlPresenter::popSub() const
{
	nodeStack.pop_back();
}