package Assignment2;

import java.io.*;

public class DirDumper {

	private final String[] xml_tags = { "<dir name=\"", "</dir>",
			"<file name=\"", "\" size=\"",
			"<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>" };
	private final CharSequence[] stopChars = { "<", ">", "&", "\"", "'" };
	private final String[] entities = { "&lt;", "&gt;", "&amp;", "&quot;",
			"&apos;" };
	private BufferedWriter writer = null;

	public void makeXMLFile(File directory) throws IOException {

		writer = new BufferedWriter(new FileWriter(new File("/home/student/miller/home.xml")));
		writer.write(xml_tags[4]
				+ (xml_tags[0])
				+ removeStopChars(directory.getName().equals("") ? directory
						.getAbsolutePath() : directory.getName()) + "\">");
		dump(directory);
		writer.write(xml_tags[1]);
		writer.flush();
		writer.close();

	}

	private void dump(File file) throws IOException {
		File[] dir = file.listFiles();
		
		System.out.println("Ich arbeite...");
		
		if (dir == null) {
			return;
		}

		for (int i = 0; i < dir.length; i++) {

			String name = removeStopChars(dir[i].getName());

			if (dir[i].isDirectory()) {
				writer.write((xml_tags[0]) + name + "\">"); //\n");
				dump(dir[i].getAbsoluteFile());
				writer.write(xml_tags[1]);
			} else {
				writer.write((xml_tags[2] + name + xml_tags[3]
						+ dir[i].length() + "\" />")); //\n"));
			}
			
		}

	}

	private String removeStopChars(String name) {
		for (int j = 0; j < stopChars.length; j++) {
			if (name.contains(stopChars[j])) {
				name = name.replace(stopChars[j], entities[j]);				
			}
		}
		return name;
	}

	public static void main(String args[]) throws IOException {

		if (args[0] == null) {
			System.out.println("Bitte Dateipfad als Parameter uebergeben");
		} else {

			DirDumper dir = new DirDumper();
			dir.makeXMLFile(new File(args[0]));
		}
	}

}