public boolean marketBottom(CommandSender sender) {
// gather the list of commodities
List<Commodities> commodities = plugin.getDatabase().find(Commodities.class).findList();
// sort 'em and return only the top 10
List<Commodities> top10 =
plugin
.getDatabase()
.filter(Commodities.class)
.sort("value asc")
.maxRows(10)
.filter(commodities);
// calculate elasticity
List<Integer> elasticities = new LinkedList<Integer>();
for (int index = 0; index < top10.size(); index++) {
Commodities c = top10.get(index);
double value = c.getValue();
double changeRate = c.getChangeRate();
double minValue = c.getMinValue();
if (value < minValue) {
double newValue = Math.abs(value - minValue);
double elasticity = (newValue / changeRate);
int el = (int) Math.round(elasticity);
elasticities.add(index, el);
c.setValue(minValue);
} else {
elasticities.add(index, 0);
}
}
// Send them to the player
for (int x = 0; x < top10.size(); x++) {
int rank = x + 1;
sender.sendMessage(
ChatColor.GREEN
+ String.valueOf(rank)
+ ". "
+ ChatColor.WHITE
+ top10.get(x).getName()
+ " "
+ ChatColor.GRAY
+ top10.get(x).getValue()
+ " "
+ ChatColor.DARK_GREEN
+ elasticities.get(x));
}
return true;
}
/**
* Determine the cost of a given number of an item and calculate a new value for the item
* accordingly.
*
* @param oper 1 for buying, 0 for selling.
* @param commodity the commodity in question
* @param amount the desired amount of the item in question
* @return the total cost and the calculated new value as an Invoice
*/
public Invoice generateInvoice(int oper, Commodities commodity, int amount) {
// get the initial value of the item, 0 for not found
Invoice inv = new Invoice(0.0, 0.0);
inv.value = commodity.getValue();
// get the spread so we can do one initial decrement of the value if we are selling
BigDecimal spread = BigDecimal.valueOf(commodity.getSpread());
// determine the total cost
inv.total = 0.0;
for (int x = 1; x <= amount; x++) {
BigDecimal minValue = BigDecimal.valueOf(commodity.getMinValue());
BigDecimal maxValue = BigDecimal.valueOf(commodity.getMaxValue());
BigDecimal changeRate = BigDecimal.valueOf(commodity.getChangeRate());
// work the spread on the first one.
if ((oper == 0) && (x == 1)) {
inv.subtractValue(spread.doubleValue());
} else if ((oper == 0) && (x > 1)) { // otherwise, do the usual decriment.
inv.subtractValue(changeRate.doubleValue());
}
// check the current value
if (inv.getValue() >= minValue.doubleValue()) { // current value is @ or above minValue
// be sure value is not above maxValue
if (inv.getValue() < maxValue.doubleValue()) { // current value is "just right"
inv.addTotal(inv.getValue()); // add current value to total
} else { // current value is above the max
inv.addTotal(maxValue.doubleValue()); // add maxValue to total
}
} else { // current value is below the minimum
inv.addTotal(minValue.doubleValue()); // add the minimum to total
if ((oper == 0) && (x == 1)) {
inv.subtractTotal(
spread
.doubleValue()); // subtract the spread if we're selling and this is the first run
}
}
// Change our stored value for the item
// we don't care about min/maxValue here because we don't want the value to 'bounce' off of
// them.
if (oper == 1) {
inv.addValue(changeRate.doubleValue());
}
}
return inv;
}
public BigDecimal price(String item) {
// retrieve the commodity in question
Commodities commodity =
plugin.getDatabase().find(Commodities.class).where().ieq("name", item).findUnique();
if (commodity == null) return null;
double price = commodity.getValue();
double minValue = commodity.getMinValue();
double maxValue = commodity.getMaxValue();
if (price > maxValue) return BigDecimal.valueOf(maxValue).setScale(2, RoundingMode.HALF_UP);
if (price < minValue) return BigDecimal.valueOf(minValue).setScale(2, RoundingMode.HALF_UP);
return BigDecimal.valueOf(price).setScale(2, RoundingMode.HALF_UP);
}
/**
* Sell a specified amount of an item for the player.
*
* @param player The player on behalf of which these actions will be carried out.
* @param item The desired item in the form of the item name.
* @param amount The desired amount of the item to sell.
* @return true on success, false on failure.
*/
public boolean sell(Player player, String item, int amount) {
// Be sure we have a positive amount
if (amount < 1) {
player.sendMessage(ChatColor.RED + "Invalid amount.");
player.sendMessage("No negative numbers or zero, please.");
return false;
}
// retrieve the commodity in question
Commodities commodity =
plugin.getDatabase().find(Commodities.class).where().ieq("name", item).findUnique();
if (commodity == null) {
player.sendMessage(ChatColor.RED + "Not allowed to buy that item.");
player.sendMessage("Be sure you typed the correct name");
return false;
}
// determine what it will pay
Invoice invoice = generateInvoice(0, commodity, amount);
// If the player has enough of the item, perform the transaction.
int id = commodity.getNumber();
Byte byteData = Byte.valueOf(String.valueOf(commodity.getData()));
ItemStack its = new ItemStack(id, amount, (short) 0, byteData);
if (player.getInventory().contains(id)) {
// Figure out how much is left over
int left = getAmountInInventory(player, its) - amount;
if (left < 0) { // this indicates the correct id, but the wrong bytedata value
// give nice output even if they gave a bad name.
player.sendMessage(ChatColor.RED + "You don't have enough " + item);
player.sendMessage(
ChatColor.GREEN
+ "In Inventory: "
+ ChatColor.WHITE
+ getAmountInInventory(player, its));
player.sendMessage(ChatColor.GREEN + "Attempted Amount: " + ChatColor.WHITE + amount);
return false;
}
// Take out all of the item
int x = 0;
for (@SuppressWarnings("unused")
ItemStack stack :
player
.getInventory()
.getContents()) { // we do it this way incase a user has an expanded inventory via
// another plugin
ItemStack slot = player.getInventory().getItem(x);
if (slot != null) {
Byte slotData = Byte.valueOf("0");
try {
slotData = slot.getData().getData();
} catch (NullPointerException e) {
}
if ((slot.getTypeId() == id) && (slotData.compareTo(byteData) == 0)) {
player.getInventory().clear(x);
}
}
x++;
}
// put back what was left over
if (left > 0) {
ItemStack itsLeft = its;
itsLeft.setAmount(left);
player.getInventory().addItem(itsLeft);
}
// record the change in value
commodity.setValue(invoice.getValue());
plugin.getDatabase().save(commodity);
// use BigDecimal to format value for output
double v = commodity.getValue();
double max = commodity.getMaxValue();
double min = commodity.getMinValue();
BigDecimal value;
if (v < max && v > min) {
value = BigDecimal.valueOf(v).setScale(2, RoundingMode.HALF_UP);
} else if (v <= min) {
value = BigDecimal.valueOf(min).setScale(2, RoundingMode.HALF_UP);
} else {
value = BigDecimal.valueOf(max).setScale(2, RoundingMode.HALF_UP);
}
BigDecimal spread = BigDecimal.valueOf(commodity.getSpread());
// give some nice output
BigDecimal sale =
BigDecimal.valueOf((invoice.getTotal() + spread.doubleValue()))
.setScale(2, RoundingMode.HALF_UP);
player.sendMessage(ChatColor.GREEN + "--------------------------------");
player.sendMessage(
ChatColor.GREEN
+ "Old Balance: "
+ ChatColor.WHITE
+ BigDecimal.valueOf(economy.getBalance(player.getName()))
.setScale(2, RoundingMode.HALF_UP));
// deposit the money
economy.depositPlayer(player.getName(), invoice.getTotal());
player.sendMessage(ChatColor.GREEN + "Sale: " + ChatColor.WHITE + sale);
player.sendMessage(ChatColor.GREEN + "Selling Fee: " + ChatColor.WHITE + spread);
player.sendMessage(ChatColor.GREEN + "--------------------------------");
player.sendMessage(
ChatColor.GREEN
+ "Net Gain: "
+ ChatColor.WHITE
+ BigDecimal.valueOf(invoice.getTotal()).setScale(2, RoundingMode.HALF_UP));
player.sendMessage(
ChatColor.GREEN
+ "New Balance: "
+ ChatColor.WHITE
+ BigDecimal.valueOf(economy.getBalance(player.getName()))
.setScale(2, RoundingMode.HALF_UP));
player.sendMessage(ChatColor.GREEN + "--------------------------------");
player.sendMessage(
ChatColor.GRAY + item + ChatColor.GREEN + " New Price: " + ChatColor.WHITE + value);
return true;
} else { // give nice output even if they gave a bad number.
player.sendMessage(ChatColor.RED + "You don't have enough " + item);
player.sendMessage(
ChatColor.GREEN + "In Inventory: " + ChatColor.WHITE + getAmountInInventory(player, its));
player.sendMessage(ChatColor.GREEN + "Attempted Amount: " + ChatColor.WHITE + amount);
return false;
}
}
/**
* Buy a specified amount of an item for the player.
*
* @param player The player on behalf of which these actions will be carried out.
* @param item The desired item in the form of the item name.
* @param amount The desired amount of the item to purchase.
* @return true on success, false on failure.
*/
public boolean buy(Player player, String item, int amount) {
// Be sure we have a positive amount
if (amount < 1) {
player.sendMessage(ChatColor.RED + "Invalid amount.");
player.sendMessage("No negative numbers or zero, please.");
return false;
}
// retrieve the commodity in question
Commodities commodity =
plugin.getDatabase().find(Commodities.class).where().ieq("name", item).findUnique();
// check that we found something
if (commodity == null) {
player.sendMessage(ChatColor.RED + "Not allowed to buy that item.");
player.sendMessage("Be sure you typed the correct name");
return false;
}
// determine what it will cost
Invoice invoice = generateInvoice(1, commodity, amount);
// check the player's wallet
if (economy.has(player.getName(), invoice.getTotal())) {
// give 'em the items and drop any extra
Byte byteData = Byte.valueOf(String.valueOf(commodity.getData()));
int id = commodity.getNumber();
HashMap<Integer, ItemStack> overflow =
player.getInventory().addItem(new ItemStack(id, amount, (short) 0, byteData));
for (int a : overflow.keySet()) {
player.getWorld().dropItem(player.getLocation(), overflow.get(a));
}
// save the new value
commodity.setValue(invoice.getValue());
getDatabase().save(commodity);
// use BigDecimal to format value for output
double v = commodity.getValue();
double max = commodity.getMaxValue();
double min = commodity.getMinValue();
BigDecimal value;
if (v < max && v > min) {
value = BigDecimal.valueOf(v).setScale(2, RoundingMode.HALF_UP);
} else if (v <= min) {
value = BigDecimal.valueOf(min).setScale(2, RoundingMode.HALF_UP);
} else {
value = BigDecimal.valueOf(max).setScale(2, RoundingMode.HALF_UP);
}
// Give some nice output.
player.sendMessage(ChatColor.GREEN + "--------------------------------");
player.sendMessage(
ChatColor.GREEN
+ "Old Balance: "
+ ChatColor.WHITE
+ BigDecimal.valueOf(economy.getBalance(player.getName()))
.setScale(2, RoundingMode.HALF_UP));
// Subtract the invoice (this is an efficient place to do this)
economy.withdrawPlayer(player.getName(), invoice.getTotal());
player.sendMessage(
ChatColor.GREEN
+ "Cost: "
+ ChatColor.WHITE
+ BigDecimal.valueOf(invoice.getTotal()).setScale(2, RoundingMode.HALF_UP));
player.sendMessage(
ChatColor.GREEN
+ "New Balance: "
+ ChatColor.WHITE
+ BigDecimal.valueOf(economy.getBalance(player.getName()))
.setScale(2, RoundingMode.HALF_UP));
player.sendMessage(ChatColor.GREEN + "--------------------------------");
player.sendMessage(
ChatColor.GRAY + item + ChatColor.GREEN + " New Price: " + ChatColor.WHITE + value);
return true;
} else { // Otherwise, give nice output anyway ;)
// The idea here is to show how much more money is needed.
BigDecimal difference =
BigDecimal.valueOf(economy.getBalance(player.getName()) - invoice.getTotal())
.setScale(2, RoundingMode.HALF_UP);
player.sendMessage(ChatColor.RED + "You don't have enough money");
player.sendMessage(
ChatColor.GREEN
+ "Balance: "
+ ChatColor.WHITE
+ BigDecimal.valueOf(economy.getBalance(player.getName()))
.setScale(2, RoundingMode.HALF_UP));
player.sendMessage(
ChatColor.GREEN
+ "Cost: "
+ ChatColor.WHITE
+ BigDecimal.valueOf(invoice.getTotal()).setScale(2, RoundingMode.HALF_UP));
player.sendMessage(ChatColor.GREEN + "Difference: " + ChatColor.RED + difference);
return true;
}
}
