mcMMO/src/main/java/com/gmail/nossr50/skills/repair/Repair.java

package com.gmail.nossr50.skills.repair;

import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.PlayerInventory;

import com.gmail.nossr50.config.AdvancedConfig;
import com.gmail.nossr50.config.Config;

public class Repair {
    // The order of the values is extremely important, a few methods depend on it to work properly
    protected enum Tier {
        FOUR(4) {
            @Override public int getLevel() { return AdvancedConfig.getInstance().getArcaneForgingRankLevels4(); }
            @Override public int getKeepEnchantChance() { return AdvancedConfig.getInstance().getArcaneForgingKeepEnchantsChanceRank4(); }
            @Override public int getDowngradeEnchantChance() { return AdvancedConfig.getInstance().getArcaneForgingDowngradeChanceRank4(); }},
        THREE(3) {
            @Override public int getLevel() { return AdvancedConfig.getInstance().getArcaneForgingRankLevels3(); }
            @Override public int getKeepEnchantChance() { return AdvancedConfig.getInstance().getArcaneForgingKeepEnchantsChanceRank3(); }
            @Override public int getDowngradeEnchantChance() { return AdvancedConfig.getInstance().getArcaneForgingDowngradeChanceRank4(); }},
        TWO(2) {
            @Override public int getLevel() { return AdvancedConfig.getInstance().getArcaneForgingRankLevels2(); }
            @Override public int getKeepEnchantChance() { return AdvancedConfig.getInstance().getArcaneForgingKeepEnchantsChanceRank2(); }
            @Override public int getDowngradeEnchantChance() { return AdvancedConfig.getInstance().getArcaneForgingDowngradeChanceRank4(); }},
        ONE(1) {
            @Override public int getLevel() { return AdvancedConfig.getInstance().getArcaneForgingRankLevels1(); }
            @Override public int getKeepEnchantChance() { return AdvancedConfig.getInstance().getArcaneForgingKeepEnchantsChanceRank1(); }
            @Override public int getDowngradeEnchantChance() { return AdvancedConfig.getInstance().getArcaneForgingDowngradeChanceRank4(); }};

        int numerical;

        private Tier(int numerical) {
            this.numerical = numerical;
        }

        public int toNumerical() {
            return numerical;
        }

        abstract protected int getLevel();
        abstract protected int getKeepEnchantChance();
        abstract protected int getDowngradeEnchantChance();
    }

    public static int    repairMasteryMaxBonusLevel = AdvancedConfig.getInstance().getRepairMasteryMaxLevel();
    public static double repairMasteryMaxBonus      = AdvancedConfig.getInstance().getRepairMasteryMaxBonus();

    public static int    superRepairMaxBonusLevel = AdvancedConfig.getInstance().getSuperRepairMaxLevel();
    public static double superRepairMaxChance     = AdvancedConfig.getInstance().getSuperRepairChanceMax();

    public static boolean arcaneForgingDowngrades  = AdvancedConfig.getInstance().getArcaneForgingDowngradeEnabled();
    public static boolean arcaneForgingEnchantLoss = AdvancedConfig.getInstance().getArcaneForgingEnchantLossEnabled();

    public static int anvilID = Config.getInstance().getRepairAnvilId();
    public static boolean anvilMessagesEnabled = Config.getInstance().getRepairAnvilMessagesEnabled();

    /**
     * Search the inventory for an item and return the index.
     *
     * @param inventory PlayerInventory to scan
     * @param itemId Item id to look for
     * @return index location where the item was found, or -1 if not found
     */
    protected static int findInInventory(PlayerInventory inventory, int itemId) {
        int location = inventory.first(itemId);

        // VALIDATE
        if (inventory.getItem(location).getTypeId() == itemId) {
            return location;
        }

        return -1;
    }

    /**
     * Search the inventory for an item and return the index.
     *
     * @param inventory PlayerInventory to scan
     * @param itemId Item id to look for
     * @param metadata Metadata to look for
     * @return index location where the item was found, or -1 if not found
     */
    protected static int findInInventory(PlayerInventory inventory, int itemId, byte metadata) {
        int location = -1;

        ItemStack[] contents = inventory.getContents();

        for (int i = 0; i < contents.length; i++) {
            ItemStack item = contents[i];

            if (item == null) {
                continue;
            }

            if (item.getTypeId() == itemId && item.getData().getData() == metadata) {
                return i;
            }
        }

        return location;
    }

    /**
     * Decrease the amount of items in this slot by one
     *
     * @param inventory PlayerInventory to work in
     * @param index Item index to decrement
     */
    protected static void removeOneFrom(PlayerInventory inventory, int index) {
        ItemStack item = inventory.getItem(index).clone();
        item.setAmount(1);

        inventory.removeItem(item);
    }
}