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/*
* Copyright (c) 2013-2016 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
#include <Sluift/ElementConvertors/DOMElementConvertor.h>
#include <iostream>
#include <memory>
#include <lua.hpp>
#include <Swiften/Base/foreach.h>
#include <Swiften/Elements/RawXMLPayload.h>
#include <Swiften/Parser/Attribute.h>
#include <Swiften/Parser/AttributeMap.h>
#include <Swiften/Parser/XMLParser.h>
#include <Swiften/Parser/XMLParserClient.h>
#include <Swiften/Serializer/PayloadSerializer.h>
#include <Swiften/Serializer/XML/XMLElement.h>
#include <Swiften/Serializer/XML/XMLRawTextNode.h>
#include <Swiften/Serializer/XML/XMLTextNode.h>
#include <Sluift/Lua/Check.h>
#include <Sluift/Lua/Debug.h>
#include <Sluift/Lua/LuaUtils.h>
using namespace Swift;
namespace {
class ParserClient : public XMLParserClient {
public:
ParserClient(lua_State* L) : L(L), currentIndex(1) {
}
virtual void handleStartElement(
const std::string& element, const std::string& ns,
const AttributeMap& attributes) SWIFTEN_OVERRIDE {
lua_checkstack(L, 6);
lua_pushnumber(L, currentIndex);
lua_newtable(L);
lua_pushstring(L, element.c_str());
lua_setfield(L, -2, "tag");
if (!ns.empty()) {
lua_pushstring(L, ns.c_str());
lua_setfield(L, -2, "ns");
}
if (!attributes.getEntries().empty()) {
lua_newtable(L);
int i = 1;
foreach(const AttributeMap::Entry& entry, attributes.getEntries()) {
lua_pushnumber(L, i);
lua_newtable(L);
lua_pushstring(L, entry.getAttribute().getName().c_str());
lua_setfield(L, -2, "name");
if (!entry.getAttribute().getNamespace().empty()) {
lua_pushstring(L, entry.getAttribute().getNamespace().c_str());
lua_setfield(L, -2, "ns");
}
lua_pushstring(L, entry.getValue().c_str());
lua_setfield(L, -2, "value");
lua_settable(L, -3);
++i;
}
lua_setfield(L, -2, "attributes");
}
indexStack.push_back(currentIndex);
currentIndex = 1;
lua_newtable(L);
}
virtual void handleEndElement(
const std::string&, const std::string&) SWIFTEN_OVERRIDE {
lua_setfield(L, -2, "children");
lua_settable(L, -3);
currentIndex = indexStack.back();
indexStack.pop_back();
currentIndex++;
}
virtual void handleCharacterData(const std::string& data) SWIFTEN_OVERRIDE {
lua_checkstack(L, 2);
lua_pushnumber(L, currentIndex);
lua_pushstring(L, data.c_str());
lua_settable(L, -3);
currentIndex++;
}
private:
lua_State* L;
std::vector<int> indexStack;
int currentIndex;
};
std::string serializeElement(lua_State* L) {
std::string tag;
lua_getfield(L, -1, "tag");
if (lua_isstring(L, -1)) {
tag = lua_tostring(L, -1);
}
lua_pop(L, 1);
std::string ns;
lua_getfield(L, -1, "ns");
if (lua_isstring(L, -1)) {
ns = lua_tostring(L, -1);
}
lua_pop(L, 1);
XMLElement element(tag, ns);
lua_getfield(L, -1, "attributes");
if (lua_istable(L, -1)) {
int index = Lua::absoluteOffset(L, -1);
for (lua_pushnil(L); lua_next(L, index) != 0; ) {
if (lua_istable(L, -1)) {
std::string attributeName;
lua_getfield(L, -1, "name");
if (lua_isstring(L, -1)) {
attributeName = lua_tostring(L, -1);
}
lua_pop(L, 1);
std::string attributeValue;
lua_getfield(L, -1, "value");
if (lua_isstring(L, -1)) {
attributeValue = lua_tostring(L, -1);
}
lua_pop(L, 1);
if (!attributeName.empty()) {
element.setAttribute(attributeName, attributeValue);
}
}
lua_pop(L, 1); // value
}
}
lua_pop(L, 1); // children
lua_getfield(L, -1, "children");
if (lua_istable(L, -1)) {
int index = Lua::absoluteOffset(L, -1);
for (lua_pushnil(L); lua_next(L, index) != 0; ) {
if (lua_isstring(L, -1)) {
element.addNode(std::make_shared<XMLTextNode>(lua_tostring(L, -1)));
}
else if (lua_istable(L, -1)) {
element.addNode(std::make_shared<XMLRawTextNode>(serializeElement(L)));
}
lua_pop(L, 1); // value
}
}
lua_pop(L, 1); // children
return element.serialize();
}
}
DOMElementConvertor::DOMElementConvertor() {
}
DOMElementConvertor::~DOMElementConvertor() {
}
std::shared_ptr<Element> DOMElementConvertor::convertFromLua(lua_State* L, int index, const std::string& type) {
if (!lua_istable(L, index) || type != "dom") {
return std::shared_ptr<Payload>();
}
return std::make_shared<RawXMLPayload>(serializeElement(L).c_str());
}
boost::optional<std::string> DOMElementConvertor::convertToLua(
lua_State* L, std::shared_ptr<Element> element) {
// Serialize payload to XML
std::shared_ptr<Payload> payload = std::dynamic_pointer_cast<Payload>(element);
if (!payload) {
return boost::optional<std::string>();
}
PayloadSerializer* serializer = serializers.getPayloadSerializer(payload);
assert(serializer);
std::string serializedPayload = serializer->serialize(payload);
lua_newtable(L);
// Parse the payload again
ParserClient parserClient(L);
std::shared_ptr<XMLParser> parser(parsers.createXMLParser(&parserClient));
bool result = parser->parse(serializedPayload);
assert(result);
// There can only be one element, so stripping the list
lua_pushnil(L);
lua_next(L, -2);
Lua::registerTableToString(L, -1);
lua_replace(L, -3);
lua_settop(L, -2);
return std::string("dom");
}
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Swift