package de.tudarmstadt.informatik.hostage.format;

import de.tudarmstadt.informatik.hostage.R;
import de.tudarmstadt.informatik.hostage.ui.MainActivity;

/**
 * Log view formatter used to format packet contents for the log view.
 * @author Wulf Pfeiffer
 */
public class LogViewFormatter {
	
	/**
	 * Formats the content of a packet giving it a specific format specified by a ProtocolFormatter. 
	 * @param protocol that is used for packet.
	 * @param packet content.
	 * @return formatted String of the packet content.
	 */
	public static String format(String protocol, String packet) {		
		return getFormatter(protocol).format(packet);
	}
	
	/**
	 * Loads a ProtocolFormatter for a protocol.
	 * If the protocol has its own formatter, with the name *protocol name*Formatter and it is located in .format package, it is loaded,
	 * else a default formatter is loaded.
	 * @param protocol that a formatter should be loaded for.
	 * @return the loaded formatter.
	 */
	private static ProtocolFormatter getFormatter(String protocol) {
		String[] protocols = MainActivity.getContext().getResources().getStringArray(R.array.protocols);
		String packageName = ProtocolFormatter.class.getPackage().getName();
		ProtocolFormatter formatter = new DefaultFormatter();

		for (String prot : protocols) {
			try {
				if(protocol.equals(prot)) formatter = (ProtocolFormatter) Class.forName(
						String.format("%s.%s", packageName, protocol+"Formatter"))
						.newInstance();
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
		return formatter;
	}

}