#include <QDebug>
#include <QtXml\qdom.h>  
#include "domdocument.h"  

DomDocument::DomDocument(QString fileName)  
{  
	m_fileName = fileName;  
}  

DomDocument::~DomDocument()  
{  

}  

int DomDocument::writeXml()  
{  
	QFile file(m_fileName);  
	if (!file.open(QIODevice::WriteOnly | QIODevice::Truncate))  
		return -2;  
	QTextStream out(&file);  
	QDomDocument doc;  
	QDomText text;  
	QDomElement element;  
	QDomAttr attr;  
	QDomProcessingInstruction instruction;  
	instruction = doc.createProcessingInstruction( "xml", "version = \'1.0\' encoding=\'UTF-8\'" );  
	doc.appendChild( instruction );  

	QDomElement root = doc.createElement( "COMMAND" );  
	doc.appendChild(root);  
	element = doc.createElement( "OBJECT" );  
	text = doc.createTextNode( "USER" );  
	element.appendChild(text);  
	root.appendChild(element);  

	element = doc.createElement( "ACTION" );  
	text = doc.createTextNode( "LOGIN" );  
	element.appendChild(text);  
	root.appendChild(element);  

	element = doc.createElement( "DATA" );  
	root.appendChild(element);  

	QDomElement userElement = doc.createElement( "USERINFO" );  
	attr = doc.createAttribute( "NAME" );  
	attr.setValue("root");  
	userElement.setAttributeNode(attr);  
	attr = doc.createAttribute( "PASSWORD" );  
	attr.setValue("123456");  
	userElement.setAttributeNode(attr);  
	element.appendChild(userElement);  

	doc.save(out, 4);       //each line space of file is 4  
	return 0;  
}  

int DomDocument::readXml()  
{  
	QDomDocument doc;  
	QFile file(m_fileName);  
	QString error = "";  
	int row = 0, column = 0;  
	if (!file.open(QIODevice::ReadOnly)) return -2;  

	if(!doc.setContent(&file, false, &error, &row, &column)){  
//		qDebug() << "parse file failed:" << row << "---" << column <<":" <<error;  
		file.close();  
		return -1;  
	}  

	file.close();  
	QDomElement root = doc.documentElement();  
	QDomNode node = root.firstChild();  
	while(!node.isNull()) {  
		QDomElement element = node.toElement(); // try to convert the node to an element.  
		if(!element.isNull()) {  
//			qDebug()<<element.tagName() << ":" << element.text();  
			QDomNode nodeson = element.firstChild();  
			while(!nodeson.isNull()) {  
				QDomElement elementson = nodeson.toElement();  
				if(!elementson.isNull()) {  
					//qDebug()<< "---" <<elementson.tagName();  
					if (elementson.hasAttribute("NAME")) {  
						//qDebug()<< "---" << "NAME=" << elementson.attributeNode("NAME").value();  
					}  
					if (elementson.hasAttribute("PASSWORD")) {  
						//qDebug()<< "---" << "PASSWORD=" << elementson.attributeNode("PASSWORD").value();  
					}  
				}  
				nodeson = nodeson.nextSibling();  
			}  
		}  
		node = node.nextSibling();  
	}  
	return 0;  
}  
int DomDocument::readXml2()  
{  
	QDomDocument doc;  
	QFile file(m_fileName);  
	QString error = "";  
	int row = 0, column = 0;  
	if (!file.open(QIODevice::ReadOnly)) return -2;  

	if(!doc.setContent(&file, false, &error, &row, &column)){  
		//qDebug() << "parse file failed:" << row << "---" << column <<":" <<error;  
		file.close();  
		return -1;  
	}  

	file.close();  
	QDomElement root = doc.documentElement();  
	QDomNode node = root.firstChildElement();  
	while(!node.isNull()) {  
		QDomElement element = node.toElement(); // try to convert the node to an element.  
		if(!element.isNull()) {  
			if (element.tagName() == "DATA") {  
				//qDebug()<< "---" <<element.tagName();  
				QDomNodeList list = element.childNodes();  
				for(int index = 0; index < list.count(); index++) {  
					QDomNode list_node = list.item(index);  
					QDomElement list_element = list_node.toElement();  
					if (list_element.hasAttribute("NAME")) {  
						//qDebug()<< "---" << "NAME =" << list_element.attributeNode("NAME").value();  
					}  
					if (list_element.hasAttribute("PASSWORD")) {  
						//qDebug()<< "---" << "PASSWORD =" << list_element.attributeNode("PASSWORD").value();  
					}
				}
			}  
			else {
				//qDebug()<<element.tagName() << ":" << element.text();  
			}
		}
		node = node.nextSibling();
	}
	return 0;
}