Trade sign

Essentials/src/com/earth2me/essentials/IUser.java

@@ -33,6 +33,8 @@ public interface IUser
 
 	void takeMoney(double value);
 
+	void giveMoney(double value);
+
 	PlayerInventory getInventory();
 
 	void updateInventory();

Essentials/src/com/earth2me/essentials/Teleport.java

@@ -48,11 +48,11 @@ public class Teleport implements Runnable
 	private long initY;
 	private long initZ;
 	private Target teleportTarget;
-	private Charge chargeFor;
+	private Trade chargeFor;
 	private final IEssentials ess;
 	private static final Logger logger = Logger.getLogger("Minecraft");
 
-	private void initTimer(long delay, Target target, Charge chargeFor)
+	private void initTimer(long delay, Target target, Trade chargeFor)
 	{
 		this.started = System.currentTimeMillis();
 		this.delay = delay;
@@ -118,12 +118,12 @@ public class Teleport implements Runnable
 		this.ess = ess;
 	}
 
-	public void respawn(Spawn spawn, Charge chargeFor) throws Exception
+	public void respawn(Spawn spawn, Trade chargeFor) throws Exception
 	{
 		teleport(new Target(spawn.getSpawn(user.getGroup())), chargeFor);
 	}
 
-	public void warp(String warp, Charge chargeFor) throws Exception
+	public void warp(String warp, Trade chargeFor) throws Exception
 	{
 		Location loc = ess.getWarps().getWarp(warp);
 		teleport(new Target(loc), chargeFor);
@@ -177,17 +177,17 @@ public class Teleport implements Runnable
 		cancel(false);
 	}
 
-	public void teleport(Location loc, Charge chargeFor) throws Exception
+	public void teleport(Location loc, Trade chargeFor) throws Exception
 	{
 		teleport(new Target(loc), chargeFor);
 	}
 
-	public void teleport(Entity entity, Charge chargeFor) throws Exception
+	public void teleport(Entity entity, Trade chargeFor) throws Exception
 	{
 		teleport(new Target(entity), chargeFor);
 	}
 
-	private void teleport(Target target, Charge chargeFor) throws Exception
+	private void teleport(Target target, Trade chargeFor) throws Exception
 	{
 		double delay = ess.getSettings().getTeleportDelay();
 
@@ -230,7 +230,7 @@ public class Teleport implements Runnable
 		now(new Target(loc));
 	}
 	
-	public void now(Location loc, Charge chargeFor) throws Exception
+	public void now(Location loc, Trade chargeFor) throws Exception
 	{
 		cooldown(false);
 		chargeFor.charge(user);
@@ -243,7 +243,7 @@ public class Teleport implements Runnable
 		now(new Target(entity));
 	}
 
-	public void back(Charge chargeFor) throws Exception
+	public void back(Trade chargeFor) throws Exception
 	{
 		teleport(new Target(user.getLastLocation()), chargeFor);
 	}
@@ -253,12 +253,12 @@ public class Teleport implements Runnable
 		back(null);
 	}
 
-	public void home(Charge chargeFor) throws Exception
+	public void home(Trade chargeFor) throws Exception
 	{
 		home(user, chargeFor);
 	}
 
-	public void home(IUser user, Charge chargeFor) throws Exception
+	public void home(IUser user, Trade chargeFor) throws Exception
 	{
 		Location loc = user.getHome(this.user.getLocation());
 		if (loc == null)

Essentials/src/com/earth2me/essentials/Trade.java

@@ -1,52 +1,53 @@
 package com.earth2me.essentials;
 
+import java.util.Map;
 import org.bukkit.inventory.ItemStack;
 
 
-public class Charge
+public class Trade
 {
 	private final transient String command;
-	private final transient Double costs;
-	private final transient ItemStack items;
+	private final transient Double money;
+	private final transient ItemStack itemStack;
 	private final transient IEssentials ess;
 
-	public Charge(final String command, final IEssentials ess)
+	public Trade(final String command, final IEssentials ess)
 	{
 		this(command, null, null, ess);
 	}
 
-	public Charge(final double money, final IEssentials ess)
+	public Trade(final double money, final IEssentials ess)
 	{
 		this(null, money, null, ess);
 	}
 
-	public Charge(final ItemStack items, final IEssentials ess)
+	public Trade(final ItemStack items, final IEssentials ess)
 	{
 		this(null, null, items, ess);
 	}
 
-	private Charge(final String command, final Double money, final ItemStack item, final IEssentials ess)
+	private Trade(final String command, final Double money, final ItemStack item, final IEssentials ess)
 	{
 		this.command = command;
-		this.costs = money;
-		this.items = item;
+		this.money = money;
+		this.itemStack = item;
 		this.ess = ess;
 	}
 
 	public void isAffordableFor(final IUser user) throws ChargeException
 	{
 		final double mon = user.getMoney();
-		if (costs != null
-			&& mon < costs
+		if (getMoney() != null
+			&& mon < getMoney()
 			&& !user.isAuthorized("essentials.eco.loan"))
 		{
 			throw new ChargeException(Util.i18n("notEnoughMoney"));
 		}
 
-		if (items != null
-			&& !InventoryWorkaround.containsItem(user.getInventory(), true, items))
+		if (getItemStack() != null
+			&& !InventoryWorkaround.containsItem(user.getInventory(), true, itemStack))
 		{
-			throw new ChargeException(Util.format("missingItems", items.getAmount(), items.getType().toString().toLowerCase().replace("_", " ")));
+			throw new ChargeException(Util.format("missingItems", getItemStack().getAmount(), getItemStack().getType().toString().toLowerCase().replace("_", " ")));
 		}
 
 		if (command != null && !command.isEmpty()
@@ -59,24 +60,41 @@ public class Charge
 		}
 	}
 
+	public void pay(final IUser user)
+	{
+		if (getMoney() != null)
+		{
+			user.giveMoney(getMoney());
+		}
+		if (getItemStack() != null)
+		{
+			final Map<Integer, ItemStack> leftOver = InventoryWorkaround.addItem(user.getInventory(), true, getItemStack());
+			for (ItemStack itemStack : leftOver.values())
+			{
+				InventoryWorkaround.dropItem(user.getLocation(), itemStack);
+			}
+			user.updateInventory();
+		}
+	}
+
 	public void charge(final IUser user) throws ChargeException
 	{
-		if (costs != null)
+		if (getMoney() != null)
 		{
 			final double mon = user.getMoney();
-			if (mon < costs && !user.isAuthorized("essentials.eco.loan"))
+			if (mon < getMoney() && !user.isAuthorized("essentials.eco.loan"))
 			{
 				throw new ChargeException(Util.i18n("notEnoughMoney"));
 			}
-			user.takeMoney(costs);
+			user.takeMoney(getMoney());
 		}
-		if (items != null)
+		if (getItemStack() != null)
 		{
-			if (!InventoryWorkaround.containsItem(user.getInventory(), true, items))
+			if (!InventoryWorkaround.containsItem(user.getInventory(), true, itemStack))
 			{
-				throw new ChargeException(Util.format("missingItems", items.getAmount(), items.getType().toString().toLowerCase().replace("_", " ")));
+				throw new ChargeException(Util.format("missingItems", getItemStack().getAmount(), getItemStack().getType().toString().toLowerCase().replace("_", " ")));
 			}
-			InventoryWorkaround.removeItem(user.getInventory(), true, items);
+			InventoryWorkaround.removeItem(user.getInventory(), true, getItemStack());
 			user.updateInventory();
 		}
 		if (command != null && !command.isEmpty()
@@ -92,4 +110,14 @@ public class Charge
 			user.takeMoney(cost);
 		}
 	}
+
+	public Double getMoney()
+	{
+		return money;
+	}
+
+	public ItemStack getItemStack()
+	{
+		return itemStack;
+	}
 }

Essentials/src/com/earth2me/essentials/signs/EssentialsSign.java

@@ -1,6 +1,6 @@
 package com.earth2me.essentials.signs;
 
-import com.earth2me.essentials.Charge;
+import com.earth2me.essentials.Trade;
 import com.earth2me.essentials.ChargeException;
 import com.earth2me.essentials.IEssentials;
 import com.earth2me.essentials.ItemDb;
@@ -36,21 +36,24 @@ public class EssentialsSign
 		{
 			return false;
 		}
-		boolean ret;
 		try
 		{
-			ret = onSignCreate(sign, user, getUsername(user), ess);
+			final boolean ret = onSignCreate(sign, user, getUsername(user), ess);
+			if (ret)
+			{
+				sign.setLine(0, String.format(FORMAT_SUCCESS, this.signName));
+			}
+			return ret;
+		}
+		catch (ChargeException ex)
+		{
+			ess.showError(user, ex, signName);
 		}
 		catch (SignException ex)
 		{
 			ess.showError(user, ex, signName);
-			ret = false;
 		}
-		if (ret)
-		{
-			sign.setLine(0, String.format(FORMAT_SUCCESS, this.signName));
-		}
-		return ret;
+		return false;
 	}
 
 	private String getUsername(final User user)
@@ -97,7 +100,7 @@ public class EssentialsSign
 		}
 	}
 
-	protected boolean onSignCreate(final ISign sign, final User player, final String username, final IEssentials ess) throws SignException
+	protected boolean onSignCreate(final ISign sign, final User player, final String username, final IEssentials ess) throws SignException, ChargeException
 	{
 		return true;
 	}
@@ -112,50 +115,189 @@ public class EssentialsSign
 		return true;
 	}
 
-	protected final void validateCharge(final ISign sign, final int index) throws SignException
+	protected final void validateTrade(final ISign sign, final int index, final IEssentials ess) throws SignException
 	{
 		final String line = sign.getLine(index).trim();
 		if (line.isEmpty())
 		{
 			return;
 		}
-
-		final boolean isMoney = line.matches("^[^0-9-][\\.0-9]+");
-		if (isMoney)
+		final Trade trade = getTrade(sign, index, 0, ess);
+		final Double money = trade.getMoney();
+		if (money != null)
 		{
-			final double quantity = Double.parseDouble(line.substring(1));
-			if (quantity <= 0)
+			sign.setLine(index, Util.formatCurrency(money));
+		}
+	}
+
+	protected final void validateTrade(final ISign sign, final int index, final boolean amountNeeded, final IEssentials ess) throws SignException
+	{
+		final String line = sign.getLine(index).trim();
+		if (line.isEmpty())
+		{
+			throw new SignException("Empty line");
+		}
+		final String[] split = line.split("[ :]+");
+
+		if (split.length == 1 && !amountNeeded)
+		{
+			final Double money = getMoney(split[0]);
+			if (money != null)
+			{
+				sign.setLine(index, Util.formatCurrency(money) + ":0");
+				return;
+			}
+		}
+
+		if (split.length == 2 && amountNeeded)
+		{
+			final Double money = getMoney(split[0]);
+			final Double amount = getDouble(split[1]);
+			if (money != null && amount != null)
+			{
+				sign.setLine(index, Util.formatCurrency(money) + ":" + Util.formatCurrency(amount).substring(1));
+				return;
+			}
+		}
+
+		if (split.length == 2 && !amountNeeded)
+		{
+			final int amount = getInteger(split[0]);
+			final ItemStack item = getItemStack(split[1], amount);
+			if (amount < 1 || item.getTypeId() == 0)
 			{
 				throw new SignException(Util.i18n("moreThanZero"));
 			}
-			sign.setLine(index, Util.formatCurrency(quantity));
+			sign.setLine(index, amount + " " + split[1] + ":0");
+			return;
 		}
-		else
+
+		if (split.length == 3 && amountNeeded)
 		{
-			final String[] split = line.split("[ :-]+", 2);
-			if (split.length != 2)
+			final int stackamount = getInteger(split[0]);
+			final ItemStack item = getItemStack(split[1], stackamount);
+			int amount = getInteger(split[2]);
+			amount -= amount % stackamount;
+			if (amount < 1 || stackamount < 1 || item.getTypeId() == 0)
 			{
-				throw new SignException(Util.i18n("invalidCharge"));
+				throw new SignException(Util.i18n("moreThanZero"));
 			}
-			try
+			sign.setLine(index, stackamount + " " + split[1] + ":" + amount);
+			return;
+		}
+		throw new SignException(Util.format("invalidSignLine", index));
+	}
+
+	protected final Trade getTrade(final ISign sign, final int index, final boolean fullAmount, final IEssentials ess) throws SignException
+	{
+		final String line = sign.getLine(index).trim();
+		if (line.isEmpty())
+		{
+			throw new SignException("Empty line");
+		}
+		final String[] split = line.split("[ :]+");
+
+		if (split.length == 2)
+		{
+			final Double money = getMoney(split[0]);
+			final Double amount = getDouble(split[1]);
+			if (money != null && amount != null)
 			{
-				final int quantity = Integer.parseInt(split[0]);
-				if (quantity <= 1)
-				{
-					throw new SignException(Util.i18n("moreThanZero"));
-				}
-				final String item = split[1].toLowerCase();
-				if (!item.equalsIgnoreCase("times"))
-				{
-					getItemStack(item);
-				}
-				sign.setLine(index, quantity + " " + item);
-			}
-			catch (NumberFormatException ex)
-			{
-				throw new SignException(Util.i18n("invalidCharge"), ex);
+				return new Trade(fullAmount ? amount : money, ess);
 			}
 		}
+
+		if (split.length == 3)
+		{
+			final int stackamount = getInteger(split[0]);
+			final ItemStack item = getItemStack(split[1], stackamount);
+			int amount = getInteger(split[2]);
+			amount -= amount % stackamount;
+			if (amount < 1 || stackamount < 1 || item.getTypeId() == 0)
+			{
+				throw new SignException(Util.i18n("moreThanZero"));
+			}
+			item.setAmount(fullAmount ? amount : stackamount);
+			return new Trade(item, ess);
+		}
+		throw new SignException(Util.format("invalidSignLine", index));
+	}
+	
+	protected final void substractAmount(final ISign sign, final int index, final Trade trade) throws SignException
+	{
+		final Double money = trade.getMoney();
+		if (money != null) {
+			changeAmount(sign, index, -money);
+		}
+		final ItemStack item = trade.getItemStack();
+		if (item != null) {
+			changeAmount(sign, index, -item.getAmount());
+		}
+	}
+	protected final void addAmount(final ISign sign, final int index, final Trade trade) throws SignException
+	{
+		final Double money = trade.getMoney();
+		if (money != null) {
+			changeAmount(sign, index, money);
+		}
+		final ItemStack item = trade.getItemStack();
+		if (item != null) {
+			changeAmount(sign, index, item.getAmount());
+		}
+	}
+	
+	private void changeAmount(final ISign sign, final int index, final double value) throws SignException
+	{
+		final String line = sign.getLine(index).trim();
+		if (line.isEmpty())
+		{
+			throw new SignException("Empty line");
+		}
+		final String[] split = line.split("[ :]+");
+
+		if (split.length == 2)
+		{
+			final Double money = getMoney(split[0]);
+			final Double amount = getDouble(split[1]);
+			if (money != null && amount != null)
+			{
+				sign.setLine(index, Util.formatCurrency(money) + ":" + Util.formatCurrency(amount+value).substring(1));
+				return;
+			}
+		}
+
+		if (split.length == 3)
+		{
+			final int stackamount = getInteger(split[0]);
+			final ItemStack item = getItemStack(split[1], stackamount);
+			int amount = getInteger(split[2]);
+			sign.setLine(index, stackamount + " " + split[1] + ":" + (amount+Math.round(value)));
+			return;
+		}
+		throw new SignException(Util.format("invalidSignLine", index));
+	}
+
+	protected final void validateTrade(final ISign sign, final int amountIndex, final int itemIndex,
+									   final User player, final IEssentials ess) throws SignException
+	{
+		final Trade trade = getTrade(sign, amountIndex, itemIndex, player, ess);
+		final ItemStack item = trade.getItemStack();
+		sign.setLine(amountIndex, Integer.toString(item.getAmount()));
+		sign.setLine(itemIndex, sign.getLine(itemIndex).trim());
+	}
+
+	protected final Trade getTrade(final ISign sign, final int amountIndex, final int itemIndex,
+								   final User player, final IEssentials ess) throws SignException
+	{
+
+		final ItemStack item = getItemStack(sign.getLine(itemIndex), 1);
+		final int amount = Math.min(getInteger(sign.getLine(amountIndex)), item.getType().getMaxStackSize() * player.getInventory().getSize());
+		if (item.getTypeId() == 0 || amount < 1)
+		{
+			throw new SignException(Util.i18n("moreThanZero"));
+		}
+		item.setAmount(amount);
+		return new Trade(item, ess);
 	}
 
 	protected final void validateInteger(final ISign sign, final int index) throws SignException
@@ -186,26 +328,13 @@ public class EssentialsSign
 		}
 	}
 
-	protected final void validateItem(final ISign sign, final int index, final boolean noair) throws SignException
-	{
-		final String line = sign.getLine(index).trim();
-		if (line.isEmpty())
-		{
-			throw new SignException("Empty line " + index);
-		}
-		ItemStack item = getItemStack(line);
-		if (noair && item.getTypeId() == 0)
-		{
-			throw new SignException("Don't sell air.");
-		}
-		sign.setLine(index, line);
-	}
-
-	protected final ItemStack getItemStack(final String itemName) throws SignException
+	protected final ItemStack getItemStack(final String itemName, final int quantity) throws SignException
 	{
 		try
 		{
-			return ItemDb.get(itemName);
+			final ItemStack item = ItemDb.get(itemName);
+			item.setAmount(quantity);
+			return item;
 		}
 		catch (Exception ex)
 		{
@@ -213,99 +342,69 @@ public class EssentialsSign
 		}
 	}
 
-	protected final void validateMoney(final ISign sign, final int index) throws SignException
+	private final Double getMoney(final String line) throws SignException
+	{
+		final boolean isMoney = line.matches("^[^0-9-\\.][\\.0-9]+");
+		return isMoney ? getDouble(line.substring(1)) : null;
+	}
+
+	private final Double getDouble(final String line) throws SignException
+	{
+		try
+		{
+			final double quantity = Double.parseDouble(line);
+			if (quantity <= 0.0)
+			{
+				throw new SignException(Util.i18n("moreThanZero"));
+			}
+			return quantity;
+		}
+		catch (NumberFormatException ex)
+		{
+			throw new SignException(ex.getMessage(), ex);
+		}
+	}
+
+	protected final Trade getTrade(final ISign sign, final int index, final IEssentials ess) throws SignException
+	{
+		return getTrade(sign, index, 1, ess);
+	}
+
+	protected final Trade getTrade(final ISign sign, final int index, final int decrement, final IEssentials ess) throws SignException
 	{
 		final String line = sign.getLine(index).trim();
 		if (line.isEmpty())
 		{
-			throw new SignException("Empty line " + index);
-		}
-		final double quantity = getMoney(line);
-		sign.setLine(index, Util.formatCurrency(quantity));
-	}
-
-	protected final double getMoney(final String line) throws SignException
-	{
-		final boolean isMoney = line.matches("^[^0-9-][\\.0-9]+");
-		if (isMoney)
-		{
-			try
-			{
-				final double quantity = Double.parseDouble(line.substring(1));
-				if (quantity <= 0)
-				{
-					throw new SignException(Util.i18n("moreThanZero"));
-				}
-				return quantity;
-			}
-			catch (NumberFormatException ex)
-			{
-				throw new SignException(ex.getMessage(), ex);
-			}
-		}
-		else
-		{
-			throw new SignException("Invalid money");
-		}
-	}
-
-	protected final Charge getCharge(final ISign sign, final int index, final IEssentials ess) throws SignException
-	{
-		final String line = sign.getLine(index).trim();
-		if (line.isEmpty())
-		{
-			return new Charge(signName.toLowerCase() + "sign", ess);
+			return new Trade(signName.toLowerCase() + "sign", ess);
 		}
 
-		final boolean isMoney = line.matches("^[^0-9-][\\.0-9]+");
-		if (isMoney)
+		final Double money = getMoney(line);
+		if (money == null)
 		{
-			try
-			{
-				final double quantity = Double.parseDouble(line.substring(1));
-				if (quantity <= 0)
-				{
-					throw new SignException(Util.i18n("moreThanZero"));
-				}
-				return new Charge(quantity, ess);
-			}
-			catch (NumberFormatException ex)
-			{
-				throw new SignException(ex.getMessage(), ex);
-			}
-		}
-		else
-		{
-			final String[] split = line.split("[ :-]+", 2);
+			final String[] split = line.split("[ :]+", 2);
 			if (split.length != 2)
 			{
 				throw new SignException(Util.i18n("invalidCharge"));
 			}
-			try
+			final int quantity = getInteger(split[0]);
+
+			final String item = split[1].toLowerCase();
+			if (item.equalsIgnoreCase("times"))
 			{
-				final int quantity = Integer.parseInt(split[0]);
-				if (quantity <= 1)
-				{
-					throw new SignException(Util.i18n("moreThanZero"));
-				}
-				final String item = split[1].toLowerCase();
-				if (item.equalsIgnoreCase("times"))
-				{
-					sign.setLine(index, (quantity - 1) + " times");
-					return new Charge(signName.toLowerCase() + "sign", ess);
-				}
-				else
-				{
-					final ItemStack stack = getItemStack(item);
-					stack.setAmount(quantity);
-					return new Charge(quantity, ess);
-				}
+				sign.setLine(index, (quantity - decrement) + " times");
+				return new Trade(signName.toLowerCase() + "sign", ess);
 			}
-			catch (NumberFormatException ex)
+			else
 			{
-				throw new SignException(Util.i18n("invalidCharge"), ex);
+				final ItemStack stack = getItemStack(item, quantity);
+				sign.setLine(index, quantity + " " + item);
+				return new Trade(quantity, ess);
 			}
 		}
+		else
+		{
+			return new Trade(money, ess);
+		}
 	}
 
 

Essentials/src/com/earth2me/essentials/signs/SignBuy.java

@@ -1,12 +1,9 @@
 package com.earth2me.essentials.signs;
 
-import com.earth2me.essentials.Charge;
+import com.earth2me.essentials.Trade;
 import com.earth2me.essentials.ChargeException;
 import com.earth2me.essentials.IEssentials;
-import com.earth2me.essentials.InventoryWorkaround;
 import com.earth2me.essentials.User;
-import java.util.Map;
-import org.bukkit.inventory.ItemStack;
 
 
 public class SignBuy extends EssentialsSign
@@ -19,26 +16,18 @@ public class SignBuy extends EssentialsSign
 	@Override
 	protected boolean onSignCreate(final ISign sign, final User player, final String username, final IEssentials ess) throws SignException
 	{
-		validateInteger(sign, 1);
-		validateItem(sign, 2, true);
-		validateCharge(sign, 3);
+		validateTrade(sign, 1, 2, player, ess);
+		validateTrade(sign, 3, ess);
 		return true;
 	}
 
 	@Override
 	protected boolean onSignInteract(final ISign sign, final User player, final String username, final IEssentials ess) throws SignException, ChargeException
 	{
-		final ItemStack item = getItemStack(sign.getLine(2));
-		final int amount = Math.min(getInteger(sign.getLine(1)), item.getType().getMaxStackSize()*player.getInventory().getSize());
-		item.setAmount(amount);
-		final Charge charge = getCharge(sign, 3, ess);
+		final Trade items = getTrade(sign, 1, 2, player, ess);
+		final Trade charge = getTrade(sign, 3, ess);
 		charge.isAffordableFor(player);
-		final Map<Integer, ItemStack> leftOver = InventoryWorkaround.addItem(player.getInventory(), true, item);
-		for (ItemStack itemStack : leftOver.values())
-		{
-			InventoryWorkaround.dropItem(player.getLocation(), itemStack);
-		}
-		player.updateInventory();
+		items.pay(player);
 		charge.charge(player);
 		return true;
 	}

Essentials/src/com/earth2me/essentials/signs/SignFree.java

@@ -1,6 +1,6 @@
 package com.earth2me.essentials.signs;
 
-import com.earth2me.essentials.Charge;
+import com.earth2me.essentials.Trade;
 import com.earth2me.essentials.IEssentials;
 import com.earth2me.essentials.ItemDb;
 import com.earth2me.essentials.User;
@@ -19,17 +19,16 @@ public class SignFree extends EssentialsSign
 	@Override
 	protected boolean onSignCreate(final ISign sign, final User player, final String username, final IEssentials ess) throws SignException
 	{
-		getItemStack(sign.getLine(1));
+		getItemStack(sign.getLine(1), 9 * 4 * 64);
 		return true;
 	}
 
 	@Override
 	protected boolean onSignInteract(final ISign sign, final User player, final String username, final IEssentials ess) throws SignException
 	{
-		final ItemStack item = getItemStack(sign.getLine(1));
+		final ItemStack item = getItemStack(sign.getLine(1), 9 * 4 * 64);
 		final CraftInventoryPlayer inv = new CraftInventoryPlayer(new InventoryPlayer(player.getHandle()));
 		inv.clear();
-		item.setAmount(9 * 4 * 64);
 		inv.addItem(item);
 		player.showInventory(inv);
 		return true;

Essentials/src/com/earth2me/essentials/signs/SignHeal.java

@@ -1,6 +1,6 @@
 package com.earth2me.essentials.signs;
 
-import com.earth2me.essentials.Charge;
+import com.earth2me.essentials.Trade;
 import com.earth2me.essentials.ChargeException;
 import com.earth2me.essentials.IEssentials;
 import com.earth2me.essentials.User;
@@ -17,14 +17,14 @@ public class SignHeal extends EssentialsSign
 	@Override
 	protected boolean onSignCreate(final ISign sign, final User player, final String username, final IEssentials ess) throws SignException
 	{
-		validateCharge(sign, 1);
+		validateTrade(sign, 1, ess);
 		return true;
 	}
 
 	@Override
 	protected boolean onSignInteract(final ISign sign, final User player, final String username, final IEssentials ess) throws SignException, ChargeException
 	{
-		final Charge charge = getCharge(sign, 1, ess);
+		final Trade charge = getTrade(sign, 1, ess);
 		charge.isAffordableFor(player);
 		player.setHealth(20);
 		player.sendMessage(Util.i18n("youAreHealed"));

Essentials/src/com/earth2me/essentials/signs/SignSell.java

@@ -1,10 +1,9 @@
 package com.earth2me.essentials.signs;
 
-import com.earth2me.essentials.Charge;
+import com.earth2me.essentials.Trade;
 import com.earth2me.essentials.ChargeException;
 import com.earth2me.essentials.IEssentials;
 import com.earth2me.essentials.User;
-import org.bukkit.inventory.ItemStack;
 
 
 public class SignSell extends EssentialsSign
@@ -17,22 +16,18 @@ public class SignSell extends EssentialsSign
 	@Override
 	protected boolean onSignCreate(final ISign sign, final User player, final String username, final IEssentials ess) throws SignException
 	{
-		validateInteger(sign, 1);
-		validateItem(sign, 2, true);
-		validateMoney(sign, 3);
+		validateTrade(sign, 1, 2, player, ess);
+		validateTrade(sign, 3, ess);
 		return true;
 	}
 	
 	@Override
 	protected boolean onSignInteract(final ISign sign, final User player, final String username, final IEssentials ess) throws SignException, ChargeException
 	{
-		final int amount = getInteger(sign.getLine(1));
-		final ItemStack item = getItemStack(sign.getLine(2));
-		item.setAmount(amount);
-		final double money = getMoney(sign.getLine(3));
-		final Charge charge = new Charge(item, ess);
+		final Trade charge = getTrade(sign, 1, 2, player, ess);
+		final Trade money = getTrade(sign, 3, ess);
 		charge.isAffordableFor(player);
-		player.giveMoney(money);
+		money.pay(player);
 		charge.charge(player);
 		return true;
 	}

Essentials/src/com/earth2me/essentials/signs/SignTime.java

@@ -1,6 +1,6 @@
 package com.earth2me.essentials.signs;
 
-import com.earth2me.essentials.Charge;
+import com.earth2me.essentials.Trade;
 import com.earth2me.essentials.ChargeException;
 import com.earth2me.essentials.IEssentials;
 import com.earth2me.essentials.User;
@@ -17,7 +17,7 @@ public class SignTime extends EssentialsSign
 	@Override
 	protected boolean onSignCreate(final ISign sign, final User player, final String username, final IEssentials ess) throws SignException
 	{
-		validateCharge(sign, 2);
+		validateTrade(sign, 2, ess);
 		final String timeString = sign.getLine(1);
 		if ("Day".equalsIgnoreCase(timeString))
 		{
@@ -35,7 +35,7 @@ public class SignTime extends EssentialsSign
 	@Override
 	protected boolean onSignInteract(final ISign sign, final User player, final String username, final IEssentials ess) throws SignException, ChargeException
 	{
-		final Charge charge = getCharge(sign, 2, ess);
+		final Trade charge = getTrade(sign, 2, ess);
 		charge.isAffordableFor(player);
 		final String timeString = sign.getLine(1);
 		long time = player.getWorld().getTime();

Essentials/src/com/earth2me/essentials/signs/SignTrade.java

@@ -0,0 +1,66 @@
+package com.earth2me.essentials.signs;
+
+import com.earth2me.essentials.ChargeException;
+import com.earth2me.essentials.IEssentials;
+import com.earth2me.essentials.Trade;
+import com.earth2me.essentials.User;
+
+
+public class SignTrade extends EssentialsSign
+{
+	public SignTrade()
+	{
+		super("Trade");
+	}
+
+	@Override
+	protected boolean onSignCreate(final ISign sign, final User player, final String username, final IEssentials ess) throws SignException, ChargeException
+	{
+		validateTrade(sign, 1, false, ess);
+		validateTrade(sign, 2, true, ess);
+		final Trade charge = getTrade(sign, 2, true, ess);
+		charge.isAffordableFor(player);
+		sign.setLine(3, "§8" + username);
+		charge.charge(player);
+		return true;
+	}
+
+	@Override
+	protected boolean onSignInteract(final ISign sign, final User player, final String username, final IEssentials ess) throws SignException, ChargeException
+	{
+		if (sign.getLine(3).substring(2).equalsIgnoreCase(username))
+		{
+			final Trade stored = getTrade(sign, 1, true, ess);
+			substractAmount(sign, 1, stored);
+			stored.pay(player);
+		}
+		else
+		{
+			final Trade charge = getTrade(sign, 1, false, ess);
+			final Trade trade = getTrade(sign, 2, false, ess);
+			charge.isAffordableFor(player);
+			substractAmount(sign, 2, trade);
+			trade.pay(player);
+			addAmount(sign, 1, charge);
+			charge.charge(player);
+		}
+		return true;
+	}
+
+	@Override
+	protected boolean onSignBreak(final ISign sign, final User player, final String username, final IEssentials ess) throws SignException
+	{
+		if (sign.getLine(3).substring(2).equalsIgnoreCase(username))
+		{
+			final Trade stored1 = getTrade(sign, 1, true, ess);
+			final Trade stored2 = getTrade(sign, 2, true, ess);
+			stored1.pay(player);
+			stored2.pay(player);
+			return true;
+		}
+		else
+		{
+			return false;
+		}
+	}
+}

Essentials/src/com/earth2me/essentials/signs/SignWarp.java

@@ -1,6 +1,6 @@
 package com.earth2me.essentials.signs;
 
-import com.earth2me.essentials.Charge;
+import com.earth2me.essentials.Trade;
 import com.earth2me.essentials.ChargeException;
 import com.earth2me.essentials.IEssentials;
 import com.earth2me.essentials.User;
@@ -16,7 +16,7 @@ public class SignWarp extends EssentialsSign
 	@Override
 	protected boolean onSignCreate(final ISign sign, final User player, final String username, final IEssentials ess) throws SignException
 	{
-		validateCharge(sign, 3);
+		validateTrade(sign, 3, ess);
 		final String warpName = sign.getLine(1);
 
 		if (warpName.isEmpty())
@@ -53,7 +53,7 @@ public class SignWarp extends EssentialsSign
 				 || player.inGroup(group)))
 			|| (!ess.getSettings().getPerWarpPermission() || player.isAuthorized("essentials.warp." + warpName)))
 		{
-			final Charge charge = getCharge(sign, 3, ess);
+			final Trade charge = getTrade(sign, 3, ess);
 			try
 			{
 				player.getTeleport().warp(warpName, charge);