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Add Villager Trading Events (#6016)

This commit is contained in:
Brennan Ward 2019-08-28 23:34:07 -04:00 committed by LexManos
parent 336d53b692
commit ee1c06085b
5 changed files with 303 additions and 0 deletions
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78
src/main/java/net/minecraftforge/common/BasicTrade.java Normal file
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@ -0,0 +1,78 @@
/*
* Minecraft Forge
* Copyright (c) 2016-2019.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation version 2.1
* of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package net.minecraftforge.common;
import java.util.Random;
import javax.annotation.Nullable;
import net.minecraft.entity.Entity;
import net.minecraft.entity.merchant.villager.VillagerTrades.ITrade;
import net.minecraft.item.ItemStack;
import net.minecraft.item.Items;
import net.minecraft.item.MerchantOffer;
/**
* A default, exposed implementation of ITrade. All of the other implementations of ITrade (in VillagerTrades) are not public.
* This class contains everything needed to make a MerchantOffer, the actual "trade" object shown in trading guis.
*/
public class BasicTrade implements ITrade
{
protected final ItemStack price;
protected final ItemStack price2;
protected final ItemStack forSale;
protected final int maxTrades;
protected final int xp;
protected final float priceMult;
public BasicTrade(ItemStack price, ItemStack price2, ItemStack forSale, int maxTrades, int xp, float priceMult)
{
this.price = price;
this.price2 = price2;
this.forSale = forSale;
this.maxTrades = maxTrades;
this.xp = xp;
this.priceMult = priceMult;
}
public BasicTrade(ItemStack price, ItemStack forSale, int maxTrades, int xp, float priceMult)
{
this(price, ItemStack.EMPTY, forSale, maxTrades, xp, priceMult);
}
public BasicTrade(int emeralds, ItemStack forSale, int maxTrades, int xp, float mult)
{
this(new ItemStack(Items.EMERALD, emeralds), forSale, maxTrades, xp, mult);
}
public BasicTrade(int emeralds, ItemStack forSale, int maxTrades, int xp)
{
this(new ItemStack(Items.EMERALD, emeralds), forSale, maxTrades, xp, 1);
}
@Override
@Nullable
public MerchantOffer getOffer(Entity merchant, Random rand)
{
return new MerchantOffer(price, price2, forSale, maxTrades, xp, priceMult);
}
}

1
src/main/java/net/minecraftforge/common/ForgeMod.java
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@ -124,6 +124,7 @@ public class ForgeMod implements WorldPersistenceHooks.WorldPersistenceHook
CapabilityFluidHandler.register();
CapabilityAnimation.register();
CapabilityEnergy.register();
MinecraftForge.EVENT_BUS.addListener(VillagerTradingManager::loadTrades);
MinecraftForge.EVENT_BUS.register(MinecraftForge.INTERNAL_HANDLER);
MinecraftForge.EVENT_BUS.register(this);

102
src/main/java/net/minecraftforge/common/VillagerTradingManager.java Normal file
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/*
* Minecraft Forge
* Copyright (c) 2016-2019.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation version 2.1
* of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package net.minecraftforge.common;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.google.common.collect.Lists;
import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
import net.minecraft.entity.merchant.villager.VillagerProfession;
import net.minecraft.entity.merchant.villager.VillagerTrades;
import net.minecraft.entity.merchant.villager.VillagerTrades.ITrade;
import net.minecraft.util.NonNullList;
import net.minecraftforge.event.village.VillagerTradesEvent;
import net.minecraftforge.event.village.WandererTradesEvent;
import net.minecraftforge.fml.event.server.FMLServerAboutToStartEvent;
import net.minecraftforge.registries.ForgeRegistries;
public class VillagerTradingManager
{
private static final Map<VillagerProfession, Int2ObjectMap<ITrade[]>> VANILLA_TRADES = new HashMap<>();
private static final Int2ObjectMap<ITrade[]> WANDERER_TRADES = new Int2ObjectOpenHashMap<>();
static
{
VillagerTrades.field_221239_a.entrySet().forEach(e ->
{
Int2ObjectMap<ITrade[]> copy = new Int2ObjectOpenHashMap<>();
e.getValue().int2ObjectEntrySet().forEach(ent -> copy.put(ent.getIntKey(), Arrays.copyOf(ent.getValue(), ent.getValue().length)));
VANILLA_TRADES.put(e.getKey(), copy);
});
VillagerTrades.field_221240_b.int2ObjectEntrySet().forEach(e -> WANDERER_TRADES.put(e.getIntKey(), Arrays.copyOf(e.getValue(), e.getValue().length)));
}
static void loadTrades(FMLServerAboutToStartEvent e)
{
postWandererEvent();
postVillagerEvents();
}
/**
* Posts the WandererTradesEvent.
*/
private static void postWandererEvent()
{
List<ITrade> generic = NonNullList.create();
List<ITrade> rare = NonNullList.create();
Arrays.stream(WANDERER_TRADES.get(1)).forEach(generic::add);
Arrays.stream(WANDERER_TRADES.get(2)).forEach(rare::add);
MinecraftForge.EVENT_BUS.post(new WandererTradesEvent(generic, rare));
VillagerTrades.field_221240_b.put(1, generic.toArray(new ITrade[0]));
VillagerTrades.field_221240_b.put(2, rare.toArray(new ITrade[0]));
}
/**
* Posts a VillagerTradesEvent for each registered profession.
*/
private static void postVillagerEvents()
{
for (VillagerProfession prof : ForgeRegistries.PROFESSIONS)
{
Int2ObjectMap<ITrade[]> trades = VANILLA_TRADES.getOrDefault(prof, new Int2ObjectOpenHashMap<>());
Int2ObjectMap<List<ITrade>> mutableTrades = new Int2ObjectOpenHashMap<>();
for (int i = 1; i < 6; i++)
{
mutableTrades.put(i, NonNullList.create());
}
trades.int2ObjectEntrySet().forEach(e ->
{
Arrays.stream(e.getValue()).forEach(mutableTrades.get(e.getIntKey())::add);
});
MinecraftForge.EVENT_BUS.post(new VillagerTradesEvent(mutableTrades, prof));
Int2ObjectMap<ITrade[]> newTrades = new Int2ObjectOpenHashMap<>();
mutableTrades.int2ObjectEntrySet().forEach(e -> newTrades.put(e.getIntKey(), e.getValue().toArray(new ITrade[0])));
VillagerTrades.field_221239_a.put(prof, newTrades);
}
}
}

65
src/main/java/net/minecraftforge/event/village/VillagerTradesEvent.java Normal file
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@ -0,0 +1,65 @@
/*
* Minecraft Forge
* Copyright (c) 2016-2019.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation version 2.1
* of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package net.minecraftforge.event.village;
import java.util.List;
import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
import net.minecraft.entity.merchant.villager.VillagerData;
import net.minecraft.entity.merchant.villager.VillagerProfession;
import net.minecraft.entity.merchant.villager.VillagerTrades.ITrade;
import net.minecraftforge.common.BasicTrade;
import net.minecraftforge.common.MinecraftForge;
import net.minecraftforge.eventbus.api.Event;
import net.minecraftforge.fml.event.server.FMLServerAboutToStartEvent;
/**
* VillagerTradesEvent is fired during the {@link FMLServerAboutToStartEvent}. It is used to gather the trade lists for each profession.
* It is fired on the {@link MinecraftForge#EVENT_BUS}.
* It is fired once for each registered villager profession.
* Villagers pick two trades from their trade map, based on their level.
* Villager level is increased by successful trades.
* The map is populated for levels 1-5 (inclusive), so Map#get will never return null for those keys.
* Levels outside of this range do nothing, as specified by {@link VillagerData#func_221128_d(int)} which is called before attempting to level up.
* To add trades to the merchant, simply add new trades to the list. {@link BasicTrade} provides a default implementation.
*/
public class VillagerTradesEvent extends Event
{
protected Int2ObjectMap<List<ITrade>> trades;
protected VillagerProfession type;
public VillagerTradesEvent(Int2ObjectMap<List<ITrade>> trades, VillagerProfession type)
{
this.trades = trades;
this.type = type;
}
public Int2ObjectMap<List<ITrade>> getTrades()
{
return trades;
}
public VillagerProfession getType()
{
return type;
}
}

57
src/main/java/net/minecraftforge/event/village/WandererTradesEvent.java Normal file
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/*
* Minecraft Forge
* Copyright (c) 2016-2019.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation version 2.1
* of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package net.minecraftforge.event.village;
import java.util.List;
import net.minecraft.entity.merchant.villager.VillagerTrades.ITrade;
import net.minecraftforge.common.BasicTrade;
import net.minecraftforge.common.MinecraftForge;
import net.minecraftforge.eventbus.api.Event;
import net.minecraftforge.fml.event.server.FMLServerAboutToStartEvent;
/**
* WandererTradesEvent is fired during the {@link FMLServerAboutToStartEvent}. It is used to gather the trade lists for the wandering merchant.
* It is fired on the {@link MinecraftForge#EVENT_BUS}.
* The wandering merchant picks a few trades from {@link TradeType#GENERIC} and a single trade from {@link TradeType#RARE}.
* To add trades to the merchant, simply add new trades to the list. {@link BasicTrade} provides a default implementation.
*/
public class WandererTradesEvent extends Event
{
protected List<ITrade> generic;
protected List<ITrade> rare;
public WandererTradesEvent(List<ITrade> generic, List<ITrade> rare)
{
this.generic = generic;
this.rare = rare;
}
public List<ITrade> getGenericTrades()
{
return generic;
}
public List<ITrade> getRareTrades()
{
return rare;
}
}