package net.sourceforge.phpeclipse.xdebug.core;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;

public class PHPDebugUtils {
	public static String getAttributeValue(Node CurrentNode,
			String AttributeName) {
		String strValue = "";
		if (CurrentNode.hasAttributes()) {
			NamedNodeMap listAttribute = CurrentNode.getAttributes();
			Node attribute = listAttribute.getNamedItem(AttributeName);
			if (attribute != null)
				strValue = attribute.getNodeValue();
		}
		return strValue;
	}

	public static String escapeString(String string) {
		StringBuffer escString = new StringBuffer();
		Pattern pattern = Pattern.compile("[a-zA-Z0-9\\._-]");
		Matcher matcher;
		for (int i = 0; i < string.length(); i++) {
			char c = string.charAt(i);
			matcher = pattern.matcher("" + c);
			if (matcher.find())
				escString.append(c);
			else {
				int hexval = (byte) c;
				escString.append("%"
						+ Integer.toHexString(hexval).toUpperCase());

			}
		}
		return escString.toString();
	}

	public static String unescapeString(String escString) {
		StringBuffer string = new StringBuffer();
		if (escString.indexOf('%') == -1)
			return escString;
		String[] s = escString.split("%");
		string.append(s[0]);
		for (int i = 1; i < s.length; i++) {
			int c = Integer.parseInt(s[i].substring(0, 2), 16);
			string.append((char) c);
			if (s[i].length() > 2)
				string.append(s[i].substring(2));

		}
		return string.toString();

	}

}