XPStore

XPStore.java

package me.messageofdeath.xpstore;

import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;
import org.bukkit.plugin.java.JavaPlugin;

public class XPStore extends JavaPlugin {
    class XPSCommandExecutor implements CommandExecutor {
        private final int MAXIMUM_LEVEL = 100;

        @Override
        public boolean onCommand(final CommandSender sender, final Command command, final String label,
                final String[] args) {
            if (!(sender instanceof Player))
                sender.sendMessage("This command is only for InGame players!");
            else {
                final Player player = (Player) sender;
                if (args.length != 1)
                    player.sendMessage(ChatColor.GREEN + "[" + ChatColor.BLUE + "XPStore" + ChatColor.GREEN + "]"
                            + ChatColor.RED + " Please use /xps <1-" + MAXIMUM_LEVEL + ">");
                else if (args[0].equalsIgnoreCase("help")) {
                    player.sendMessage(ChatColor.GOLD + "                       _________");
                    player.sendMessage(ChatColor.GOLD + "_______________-[XPStore]-_______________");
                    player.sendMessage(ChatColor.GOLD + "                       ---------");
                    player.sendMessage(ChatColor.GREEN + "/xps <1-" + MAXIMUM_LEVEL + ">");
                    player.sendMessage(ChatColor.GREEN + "Iron Ingots will be 1-" + MAXIMUM_LEVEL + "");
                } else
                    try {
                        final int level = Integer.parseInt(args[0]);
                        if (level > MAXIMUM_LEVEL)
                            player.sendMessage(ChatColor.GREEN + "[" + ChatColor.BLUE + "XPStore" + ChatColor.GREEN
                                    + "]" + ChatColor.RED + "The level you've requested is too hight!");
                        else if (player.hasPermission("xps.buy"))
                            if (player.getInventory().contains(Material.IRON_INGOT, level)) {
                                if (player.getLevel() < level) {
                                    player.getInventory().removeItem(new ItemStack(Material.IRON_INGOT, level));
                                    player.setLevel(level);
                                } else if (player.getLevel() == level)
                                    player.sendMessage(ChatColor.GREEN + "[" + ChatColor.BLUE + "XPStore"
                                            + ChatColor.GREEN + "]" + ChatColor.RED + " You are already level " + level
                                            + "!");
                                else if (player.getLevel() > level)
                                    player.sendMessage(ChatColor.GREEN + "[" + ChatColor.BLUE + "XPStore"
                                            + ChatColor.GREEN + "]" + ChatColor.RED
                                            + " Why do you want to lower your level?!");
                            } else
                                player.sendMessage(ChatColor.GREEN + "[" + ChatColor.BLUE + "XPStore" + ChatColor.GREEN
                                        + "]" + ChatColor.RED + " You need " + level + " Iron Ingot(s)!");
                        else
                            player.sendMessage(ChatColor.GREEN + "[" + ChatColor.BLUE + "XPStore" + ChatColor.GREEN
                                    + "]" + ChatColor.RED + " You do not have permission to buy from the store!");
                    } catch (final NumberFormatException e) {
                        player.sendMessage(ChatColor.GREEN + "[" + ChatColor.BLUE + "XPStore" + ChatColor.GREEN + "]"
                                + ChatColor.RED + " Please use /xps <1-" + MAXIMUM_LEVEL + ">");
                    }
            }
            return true;
        }
    }

    private final XPSCommandExecutor commandExecutor = new XPSCommandExecutor();

    @Override
    public void onEnable() {
        super.onEnable();
        getCommand("xps").setExecutor(commandExecutor);
    }
}