src/main/java/mekanism/client/HolidayManager.java

package mekanism.client;

import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;

import mekanism.api.EnumColor;
import mekanism.common.Mekanism;

import net.minecraft.client.Minecraft;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.util.ChatComponentText;

public final class HolidayManager
{
	private static Calendar calendar = Calendar.getInstance();
	private static Minecraft mc = Minecraft.getMinecraft();

	public static List<Holiday> holidays = new ArrayList<Holiday>();
	private static List<Holiday> holidaysNotified = new ArrayList<Holiday>();

	public static void init()
	{
		if(MekanismClient.holidays)
		{
			holidays.add(new Christmas());
			holidays.add(new NewYear());
		}

		Mekanism.logger.info("Initialized HolidayManager.");
	}

	public static void check()
	{
		try {
			YearlyDate date = getDate();

			for(Holiday holiday : holidays)
			{
				if(!holidaysNotified.contains(holiday))
				{
					if(holiday.getDate().equals(date))
					{
						holiday.onEvent(mc.thePlayer);
						holidaysNotified.add(holiday);
					}
				}
			}
		} catch(Exception e) {}
	}

	public static String filterSound(String sound)
	{
		if(!MekanismClient.holidays)
		{
			return sound;
		}

		try {
			YearlyDate date = getDate();

			for(Holiday holiday : holidays)
			{
				if(holiday.getDate().equals(date))
				{
					return holiday.filterSound(sound);
				}
			}
		} catch(Exception e) {}

		return sound;
	}

	private static YearlyDate getDate()
	{
		return new YearlyDate(calendar.get(Calendar.MONTH)+1, calendar.get(Calendar.DAY_OF_MONTH));
	}

	public static abstract class Holiday
	{
		public abstract YearlyDate getDate();

		public abstract void onEvent(EntityPlayer player);

		public String filterSound(String sound)
		{
			return sound;
		}
	}

	private static class Christmas extends Holiday
	{
		private String[] nutcracker = new String[] {"holiday/Nutcracker1.ogg", "holiday/Nutcracker2.ogg", "holiday/Nutcracker3.ogg", "holiday/Nutcracker4.ogg", "holiday/Nutcracker5.ogg"};

		@Override
		public YearlyDate getDate()
		{
			return new YearlyDate(12, 25);
		}

		@Override
		public void onEvent(EntityPlayer player)
		{
			String themedLines = getThemedLines(new EnumColor[] {EnumColor.DARK_GREEN, EnumColor.DARK_RED}, 13);
			player.addChatMessage(new ChatComponentText(themedLines + EnumColor.DARK_BLUE + "[Mekanism]" + themedLines));
			player.addChatMessage(new ChatComponentText(EnumColor.RED + "Merry Christmas, " + EnumColor.DARK_BLUE + player.getCommandSenderName() + EnumColor.RED + "!"));
			player.addChatMessage(new ChatComponentText(EnumColor.RED + "May you have plenty of Christmas cheer"));
			player.addChatMessage(new ChatComponentText(EnumColor.RED + "and have a relaxing holiday with your"));
			player.addChatMessage(new ChatComponentText(EnumColor.RED + "family :)"));
			player.addChatMessage(new ChatComponentText(EnumColor.DARK_GREY + "-aidancbrady"));
			player.addChatMessage(new ChatComponentText(themedLines + EnumColor.DARK_BLUE + "[=======]" + themedLines));
		}

		@Override
		public String filterSound(String sound)
		{
			if(sound.equals("Chamber.ogg"))
			{
				return nutcracker[0];
			}
			else if(sound.equals("MetallurgicInfuser.ogg"))
			{
				return nutcracker[1];
			}
			else if(sound.equals("PurificationChamber.ogg"))
			{
				return nutcracker[2];
			}
			else if(sound.equals("Smelter.ogg"))
			{
				return nutcracker[3];
			}
			else if(sound.equals("HeatGenerator.ogg"))
			{
				return nutcracker[4];
			}

			return sound;
		}
	}

	private static class NewYear extends Holiday
	{
		@Override
		public YearlyDate getDate()
		{
			return new YearlyDate(1, 1);
		}

		@Override
		public void onEvent(EntityPlayer player)
		{
			String themedLines = getThemedLines(new EnumColor[] {EnumColor.WHITE, EnumColor.YELLOW}, 13);
			player.addChatMessage(new ChatComponentText(themedLines + EnumColor.DARK_BLUE + "[Mekanism]" + themedLines));
			player.addChatMessage(new ChatComponentText(EnumColor.AQUA + "Happy New Year, " + EnumColor.DARK_BLUE + player.getCommandSenderName() + EnumColor.RED + "!"));
			player.addChatMessage(new ChatComponentText(EnumColor.AQUA + "Best wishes to you as we enter this"));
			player.addChatMessage(new ChatComponentText(EnumColor.AQUA + "new and exciting year of " + calendar.get(Calendar.YEAR) + "! :)"));
			player.addChatMessage(new ChatComponentText(EnumColor.DARK_GREY + "-aidancbrady"));
			player.addChatMessage(new ChatComponentText(themedLines + EnumColor.DARK_BLUE + "[=======]" + themedLines));
		}
	}

	public static enum Month
	{
		JANUARY("January"),
		FEBRUARY("February"),
		MARCH("March"),
		APRIL("April"),
		MAY("May"),
		JUNE("June"),
		JULY("July"),
		AUGUST("August"),
		SEPTEMBER("September"),
		OCTOBER("October"),
		NOVEMBER("November"),
		DECEMBER("December");

		private final String name;

		private Month(String n)
		{
			name = n;
		}

		public String getName()
		{
			return name;
		}

		public int month()
		{
			return ordinal()+1;
		}
	}

	public static class YearlyDate
	{
		public Month month;

		public int day;

		public YearlyDate(Month m, int d)
		{
			month = m;
			day = d;
		}

		public YearlyDate(int m, int d)
		{
			this(Month.values()[m-1], d);
		}

		@Override
		public boolean equals(Object obj)
		{
			return obj instanceof YearlyDate && ((YearlyDate)obj).month == month && ((YearlyDate)obj).day == day;
		}

		@Override
		public int hashCode()
		{
			int code = 1;
			code = 31 * code + month.ordinal();
			code = 31 * code + day;
			return code;
		}
	}

	private static String getThemedLines(EnumColor[] colors, int amount)
	{
		StringBuilder builder = new StringBuilder();

		for(int i = 0; i < amount; i++)
		{
			builder.append(colors[i%colors.length] + "-");
		}

		return builder.toString();
	}
}