TF-EssentialsX/Essentials/src/com/earth2me/essentials/api/Economy.java

package com.earth2me.essentials.api;

import com.earth2me.essentials.EssentialsConf;
import static com.earth2me.essentials.I18n._;
import com.earth2me.essentials.IEssentials;
import com.earth2me.essentials.User;
import com.earth2me.essentials.utils.StringUtil;
import com.earth2me.essentials.utils.NumberUtil;
import java.io.File;
import java.math.BigDecimal;
import java.math.MathContext;
import java.util.logging.Level;
import java.util.logging.Logger;


/**
 * Instead of using this api directly, we recommend to use the register plugin: http://bit.ly/RegisterMethod
 */
public final class Economy
{
	private Economy()
	{
	}
	private static final Logger logger = Logger.getLogger("Minecraft");
	private static IEssentials ess;
	private static final String noCallBeforeLoad = "Essentials API is called before Essentials is loaded.";
	public static final MathContext MATH_CONTEXT = MathContext.DECIMAL128;

	/**
	 * @param aEss the ess to set
	 */
	public static void setEss(IEssentials aEss)
	{
		ess = aEss;
	}

	private static void createNPCFile(String name)
	{
		File folder = new File(ess.getDataFolder(), "userdata");
		if (!folder.exists())
		{
			folder.mkdirs();
		}
		EssentialsConf npcConfig = new EssentialsConf(new File(folder, StringUtil.sanitizeFileName(name) + ".yml"));
		npcConfig.load();
		npcConfig.setProperty("npc", true);
		npcConfig.setProperty("money", ess.getSettings().getStartingBalance());
		npcConfig.forceSave();
	}

	private static void deleteNPC(String name)
	{
		File folder = new File(ess.getDataFolder(), "userdata");
		if (!folder.exists())
		{
			folder.mkdirs();
		}
		File config = new File(folder, StringUtil.sanitizeFileName(name) + ".yml");
		EssentialsConf npcConfig = new EssentialsConf(config);
		npcConfig.load();
		if (npcConfig.hasProperty("npc") && npcConfig.getBoolean("npc", false))
		{
			if (!config.delete())
			{
				logger.log(Level.WARNING, _("deleteFileError", config));
			}
			ess.getUserMap().removeUser(name);
		}
	}

	private static User getUserByName(String name)
	{
		if (ess == null)
		{
			throw new RuntimeException(noCallBeforeLoad);
		}
		return ess.getUser(name);
	}

	/**
	 * Returns the balance of a user
	 *
	 * @param name Name of the user
	 * @return balance
	 * @throws UserDoesNotExistException
	 */
	@Deprecated
	public static double getMoney(String name) throws UserDoesNotExistException
	{
		return getMoneyExact(name).doubleValue();
	}

	public static BigDecimal getMoneyExact(String name) throws UserDoesNotExistException
	{
		User user = getUserByName(name);
		if (user == null)
		{
			throw new UserDoesNotExistException(name);
		}
		return user.getMoney();
	}

	/**
	 * Sets the balance of a user
	 *
	 * @param name Name of the user
	 * @param balance The balance you want to set
	 * @throws UserDoesNotExistException If a user by that name does not exists
	 * @throws NoLoanPermittedException If the user is not allowed to have a negative balance
	 */
	@Deprecated
	public static void setMoney(String name, double balance) throws UserDoesNotExistException, NoLoanPermittedException
	{
		try
		{
			setMoney(name, BigDecimal.valueOf(balance));
		}
		catch (ArithmeticException e)
		{
			logger.log(Level.WARNING, "Failed to set balance of " + name + " to " + balance + ": " + e.getMessage(), e);
		}
	}

	public static void setMoney(String name, BigDecimal balance) throws UserDoesNotExistException, NoLoanPermittedException
	{
		User user = getUserByName(name);
		if (user == null)
		{
			throw new UserDoesNotExistException(name);
		}
		if (balance.compareTo(ess.getSettings().getMinMoney()) < 0)
		{
			throw new NoLoanPermittedException();
		}
		if (balance.signum() < 0 && !user.isAuthorized("essentials.eco.loan"))
		{
			throw new NoLoanPermittedException();
		}
		user.setMoney(balance);
	}

	/**
	 * Adds money to the balance of a user
	 *
	 * @param name Name of the user
	 * @param amount The money you want to add
	 * @throws UserDoesNotExistException If a user by that name does not exists
	 * @throws NoLoanPermittedException If the user is not allowed to have a negative balance
	 */
	@Deprecated
	public static void add(String name, double amount) throws UserDoesNotExistException, NoLoanPermittedException
	{
		try
		{
			add(name, BigDecimal.valueOf(amount));
		}
		catch (ArithmeticException e)
		{
			logger.log(Level.WARNING, "Failed to add " + amount + " to balance of " + name + ": " + e.getMessage(), e);
		}
	}

	public static void add(String name, BigDecimal amount) throws UserDoesNotExistException, NoLoanPermittedException, ArithmeticException
	{
		BigDecimal result = getMoneyExact(name).add(amount, MATH_CONTEXT);
		setMoney(name, result);
	}

	/**
	 * Substracts money from the balance of a user
	 *
	 * @param name Name of the user
	 * @param amount The money you want to substract
	 * @throws UserDoesNotExistException If a user by that name does not exists
	 * @throws NoLoanPermittedException If the user is not allowed to have a negative balance
	 */
	@Deprecated
	public static void subtract(String name, double amount) throws UserDoesNotExistException, NoLoanPermittedException
	{
		try
		{
			substract(name, BigDecimal.valueOf(amount));
		}
		catch (ArithmeticException e)
		{
			logger.log(Level.WARNING, "Failed to substract " + amount + " of balance of " + name + ": " + e.getMessage(), e);
		}
	}

	public static void substract(String name, BigDecimal amount) throws UserDoesNotExistException, NoLoanPermittedException, ArithmeticException
	{
		BigDecimal result = getMoneyExact(name).subtract(amount, MATH_CONTEXT);
		setMoney(name, result);
	}

	/**
	 * Divides the balance of a user by a value
	 *
	 * @param name Name of the user
	 * @param value The balance is divided by this value
	 * @throws UserDoesNotExistException If a user by that name does not exists
	 * @throws NoLoanPermittedException If the user is not allowed to have a negative balance
	 */
	@Deprecated
	public static void divide(String name, double amount) throws UserDoesNotExistException, NoLoanPermittedException
	{
		try
		{
			divide(name, BigDecimal.valueOf(amount));
		}
		catch (ArithmeticException e)
		{
			logger.log(Level.WARNING, "Failed to divide balance of " + name + " by " + amount + ": " + e.getMessage(), e);
		}
	}

	public static void divide(String name, BigDecimal amount) throws UserDoesNotExistException, NoLoanPermittedException, ArithmeticException
	{
		BigDecimal result = getMoneyExact(name).divide(amount, MATH_CONTEXT);
		setMoney(name, result);
	}

	/**
	 * Multiplies the balance of a user by a value
	 *
	 * @param name Name of the user
	 * @param value The balance is multiplied by this value
	 * @throws UserDoesNotExistException If a user by that name does not exists
	 * @throws NoLoanPermittedException If the user is not allowed to have a negative balance
	 */
	@Deprecated
	public static void multiply(String name, double amount) throws UserDoesNotExistException, NoLoanPermittedException
	{
		try
		{
			multiply(name, BigDecimal.valueOf(amount));
		}
		catch (ArithmeticException e)
		{
			logger.log(Level.WARNING, "Failed to multiply balance of " + name + " by " + amount + ": " + e.getMessage(), e);
		}
	}

	public static void multiply(String name, BigDecimal amount) throws UserDoesNotExistException, NoLoanPermittedException, ArithmeticException
	{
		BigDecimal result = getMoneyExact(name).multiply(amount, MATH_CONTEXT);
		setMoney(name, result);
	}

	/**
	 * Resets the balance of a user to the starting balance
	 *
	 * @param name Name of the user
	 * @throws UserDoesNotExistException If a user by that name does not exists
	 * @throws NoLoanPermittedException If the user is not allowed to have a negative balance
	 */
	public static void resetBalance(String name) throws UserDoesNotExistException, NoLoanPermittedException
	{
		if (ess == null)
		{
			throw new RuntimeException(noCallBeforeLoad);
		}
		setMoney(name, ess.getSettings().getStartingBalance());
	}

	/**
	 * @param name Name of the user
	 * @param amount The amount of money the user should have
	 * @return true, if the user has more or an equal amount of money
	 * @throws UserDoesNotExistException If a user by that name does not exists
	 */
	@Deprecated
	public static boolean hasEnough(String name, double amount) throws UserDoesNotExistException
	{
		try
		{
			return hasEnough(name, BigDecimal.valueOf(amount));
		}
		catch (ArithmeticException e)
		{
			logger.log(Level.WARNING, "Failed to compare balance of " + name + " with " + amount + ": " + e.getMessage(), e);
			return false;
		}
	}

	public static boolean hasEnough(String name, BigDecimal amount) throws UserDoesNotExistException, ArithmeticException
	{
		return amount.compareTo(getMoneyExact(name)) <= 0;
	}

	/**
	 * @param name Name of the user
	 * @param amount The amount of money the user should have
	 * @return true, if the user has more money
	 * @throws UserDoesNotExistException If a user by that name does not exists
	 */
	@Deprecated
	public static boolean hasMore(String name, double amount) throws UserDoesNotExistException
	{
		try
		{
			return hasMore(name, BigDecimal.valueOf(amount));
		}
		catch (ArithmeticException e)
		{
			logger.log(Level.WARNING, "Failed to compare balance of " + name + " with " + amount + ": " + e.getMessage(), e);
			return false;
		}
	}

	public static boolean hasMore(String name, BigDecimal amount) throws UserDoesNotExistException, ArithmeticException
	{
		return amount.compareTo(getMoneyExact(name)) < 0;
	}

	/**
	 * @param name Name of the user
	 * @param amount The amount of money the user should not have
	 * @return true, if the user has less money
	 * @throws UserDoesNotExistException If a user by that name does not exists
	 */
	@Deprecated
	public static boolean hasLess(String name, double amount) throws UserDoesNotExistException
	{
		try
		{
			return hasLess(name, BigDecimal.valueOf(amount));
		}
		catch (ArithmeticException e)
		{
			logger.log(Level.WARNING, "Failed to compare balance of " + name + " with " + amount + ": " + e.getMessage(), e);
			return false;
		}
	}

	public static boolean hasLess(String name, BigDecimal amount) throws UserDoesNotExistException, ArithmeticException
	{
		return amount.compareTo(getMoneyExact(name)) > 0;
	}

	/**
	 * Test if the user has a negative balance
	 *
	 * @param name Name of the user
	 * @return true, if the user has a negative balance
	 * @throws UserDoesNotExistException If a user by that name does not exists
	 */
	public static boolean isNegative(String name) throws UserDoesNotExistException
	{
		return getMoneyExact(name).signum() < 0;
	}

	/**
	 * Formats the amount of money like all other Essentials functions. Example: $100000 or $12345.67
	 *
	 * @param amount The amount of money
	 * @return Formatted money
	 */
	@Deprecated
	public static String format(double amount)
	{
		try
		{
			return format(BigDecimal.valueOf(amount));
		}
		catch (NumberFormatException e)
		{
			logger.log(Level.WARNING, "Failed to display " + amount + ": " + e.getMessage(), e);
			return "NaN";
		}
	}

	public static String format(BigDecimal amount)
	{
		if (ess == null)
		{
			throw new RuntimeException(noCallBeforeLoad);
		}
		return NumberUtil.displayCurrency(amount, ess);
	}

	/**
	 * Test if a player exists to avoid the UserDoesNotExistException
	 *
	 * @param name Name of the user
	 * @return true, if the user exists
	 */
	public static boolean playerExists(String name)
	{
		return getUserByName(name) != null;
	}

	/**
	 * Test if a player is a npc
	 *
	 * @param name Name of the player
	 * @return true, if it's a npc
	 * @throws UserDoesNotExistException
	 */
	public static boolean isNPC(String name) throws UserDoesNotExistException
	{
		User user = getUserByName(name);
		if (user == null)
		{
			throw new UserDoesNotExistException(name);
		}
		return user.isNPC();
	}

	/**
	 * Creates dummy files for a npc, if there is no player yet with that name.
	 *
	 * @param name Name of the player
	 * @return true, if a new npc was created
	 */
	public static boolean createNPC(String name)
	{
		User user = getUserByName(name);
		if (user == null)
		{
			createNPCFile(name);
			return true;
		}
		return false;
	}

	/**
	 * Deletes a user, if it is marked as npc.
	 *
	 * @param name Name of the player
	 * @throws UserDoesNotExistException
	 */
	public static void removeNPC(String name) throws UserDoesNotExistException
	{
		User user = getUserByName(name);
		if (user == null)
		{
			throw new UserDoesNotExistException(name);
		}
		deleteNPC(name);
	}
}