package dk.thoerup.traininfo.util;


import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;

import dk.thoerup.traininfo.util.IntSet;



public class FavoritesHelper {

	final static String FAVORITES = "favorites";

	Context cxt;
	public FavoritesHelper(Context cxt) {
		this.cxt = cxt;
	}

	protected SharedPreferences getPrefs() {
		return cxt.getSharedPreferences("TrainStation", 0);
	}

	protected IntSet getFavorites() {
		String favoriteString = getPrefs().getString(FAVORITES, "");

		IntSet favorites = new IntSet();
		if (! favoriteString.equals("") ) {
			favorites.fromString(favoriteString);
		}

		return favorites;
	}

	public int getSize() {
		return getFavorites().size();
	}

	public String getString() {
		return getFavorites().toString();
	}

	public boolean hasFavorite(int station) {
		IntSet favorites = getFavorites();

		return favorites.contains(station);
	}

	public void addFavorite(int newfav) {
		SharedPreferences prefs = getPrefs();
	
		IntSet favorites = getFavorites();
		favorites.add(newfav);

		Editor ed = prefs.edit();
		ed.putString(FAVORITES, favorites.toString());
		ed.commit();
	}

	public void removeFavorite(int newfav) {
		SharedPreferences prefs = getPrefs();
	
		IntSet favorites = getFavorites();
		favorites.remove(newfav);

		Editor ed = prefs.edit();
		ed.putString(FAVORITES, favorites.toString());
		ed.commit();
	}



}