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Code Issues
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Paper/patches/server/0914-Add-PlayerTradeEvent-and-PlayerPurchaseEvent.patch
Spottedleaf 8c5b837e05 Rework async chunk api implementation 
Firstly, the old methods all routed to the CompletableFuture method.
However, the CF method could not guarantee that if the caller
was off-main that the future would be "completed" on-main. Since
the callback methods used the CF one, this meant that the callback
methods did not guarantee that the callbacks were to be called on
the main thread.

Now, all methods route to getChunkAtAsync(x, z, gen, urgent, cb)
so that the methods with the callback are guaranteed to invoke
the callback on the main thread. The CF behavior remains unchanged;
it may still appear to complete on main if invoked off-main.

Secondly, remove the scheduleOnMain invocation in the async
chunk completion. This unnecessarily delays the callback
by 1 tick.

Thirdly, add getChunksAtAsync(minX, minZ, maxX, maxZ, ...) which
will load chunks within an area. This method is provided as a helper
as keeping all chunks loaded within an area can be complicated to
implement for plugins (due to the lacking ticket API), and is
already implemented internally anyways.

Fourthly, remove the ticket addition that occured with getChunkAt
and getChunkAtAsync. The ticket addition may delay the unloading
of the chunk unnecessarily. It also fixes a very rare timing bug
where the future/callback would be completed after the chunk
unloads.
2024-11-18 23:00:59 -08:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Thu, 2 Jul 2020 16:12:10 -0700
Subject: [PATCH] Add PlayerTradeEvent and PlayerPurchaseEvent
Co-authored-by: Alexander <protonull@protonmail.com>
diff --git a/src/main/java/net/minecraft/world/entity/npc/AbstractVillager.java b/src/main/java/net/minecraft/world/entity/npc/AbstractVillager.java
index 39cb40b077e9c07471437d5bec16ba9a7e6bce52..5f656fc726a1dc5f42657095a2f2b7cf85b92d7c 100644
--- a/src/main/java/net/minecraft/world/entity/npc/AbstractVillager.java
+++ b/src/main/java/net/minecraft/world/entity/npc/AbstractVillager.java
@@ -141,11 +141,24 @@ public abstract class AbstractVillager extends AgeableMob implements InventoryCa
@Override
public void overrideXp(int experience) {}
+ // Paper start - Add PlayerTradeEvent and PlayerPurchaseEvent
+ @Override
+ public void processTrade(MerchantOffer recipe, @Nullable io.papermc.paper.event.player.PlayerPurchaseEvent event) { // The MerchantRecipe passed in here is the one set by the PlayerPurchaseEvent
+ if (event == null || event.willIncreaseTradeUses()) {
+ recipe.increaseUses();
+ }
+ if (event == null || event.isRewardingExp()) {
+ this.rewardTradeXp(recipe);
+ }
+ this.notifyTrade(recipe);
+ }
+ // Paper end - Add PlayerTradeEvent and PlayerPurchaseEvent
+
@Override
public void notifyTrade(MerchantOffer offer) {
- offer.increaseUses();
+ // offer.increaseUses(); // Paper - Add PlayerTradeEvent and PlayerPurchaseEvent
this.ambientSoundTime = -this.getAmbientSoundInterval();
- this.rewardTradeXp(offer);
+ // this.rewardTradeXp(offer); // Paper - Add PlayerTradeEvent and PlayerPurchaseEvent
if (this.tradingPlayer instanceof ServerPlayer) {
CriteriaTriggers.TRADE.trigger((ServerPlayer) this.tradingPlayer, this, offer.getResult());
}
diff --git a/src/main/java/net/minecraft/world/inventory/AbstractContainerMenu.java b/src/main/java/net/minecraft/world/inventory/AbstractContainerMenu.java
index 85caec29a705f216eff8a5ae11f250697891a05c..78d0ff45c016e900d87010e8b26b0bb10e63f445 100644
--- a/src/main/java/net/minecraft/world/inventory/AbstractContainerMenu.java
+++ b/src/main/java/net/minecraft/world/inventory/AbstractContainerMenu.java
@@ -831,6 +831,14 @@ public abstract class AbstractContainerMenu {
public abstract boolean stillValid(Player player);
protected boolean moveItemStackTo(ItemStack stack, int startIndex, int endIndex, boolean fromLast) {
+ // Paper start - Add PlayerTradeEvent and PlayerPurchaseEvent
+ return this.moveItemStackTo(stack, startIndex, endIndex, fromLast, false);
+ }
+ protected boolean moveItemStackTo(ItemStack stack, int startIndex, int endIndex, boolean fromLast, boolean isCheck) {
+ if (isCheck) {
+ stack = stack.copy();
+ }
+ // Paper end - Add PlayerTradeEvent and PlayerPurchaseEvent
boolean flag1 = false;
int k = startIndex;
@@ -854,6 +862,11 @@ public abstract class AbstractContainerMenu {
slot = (Slot) this.slots.get(k);
itemstack1 = slot.getItem();
+ // Paper start - Add PlayerTradeEvent and PlayerPurchaseEvent; clone if only a check
+ if (isCheck) {
+ itemstack1 = itemstack1.copy();
+ }
+ // Paper end - Add PlayerTradeEvent and PlayerPurchaseEvent
if (!itemstack1.isEmpty() && ItemStack.isSameItemSameComponents(stack, itemstack1)) {
l = itemstack1.getCount() + stack.getCount();
int i1 = slot.getMaxStackSize(itemstack1);
@@ -861,12 +874,16 @@ public abstract class AbstractContainerMenu {
if (l <= i1) {
stack.setCount(0);
itemstack1.setCount(l);
+ if (!isCheck) { // Paper - Add PlayerTradeEvent and PlayerPurchaseEvent
slot.setChanged();
+ } // Paper - Add PlayerTradeEvent and PlayerPurchaseEvent
flag1 = true;
} else if (itemstack1.getCount() < i1) {
stack.shrink(i1 - itemstack1.getCount());
itemstack1.setCount(i1);
+ if (!isCheck) { // Paper - Add PlayerTradeEvent and PlayerPurchaseEvent
slot.setChanged();
+ } // Paper - Add PlayerTradeEvent and PlayerPurchaseEvent
flag1 = true;
}
}
@@ -897,10 +914,21 @@ public abstract class AbstractContainerMenu {
slot = (Slot) this.slots.get(k);
itemstack1 = slot.getItem();
+ // Paper start - Add PlayerTradeEvent and PlayerPurchaseEvent
+ if (isCheck) {
+ itemstack1 = itemstack1.copy();
+ }
+ // Paper end - Add PlayerTradeEvent and PlayerPurchaseEvent
if (itemstack1.isEmpty() && slot.mayPlace(stack)) {
l = slot.getMaxStackSize(stack);
+ // Paper start - Add PlayerTradeEvent and PlayerPurchaseEvent
+ if (isCheck) {
+ stack.shrink(Math.min(stack.getCount(), l));
+ } else {
+ // Paper end - Add PlayerTradeEvent and PlayerPurchaseEvent
slot.setByPlayer(stack.split(Math.min(stack.getCount(), l)));
slot.setChanged();
+ } // Paper - Add PlayerTradeEvent and PlayerPurchaseEvent
flag1 = true;
break;
}
diff --git a/src/main/java/net/minecraft/world/inventory/MerchantMenu.java b/src/main/java/net/minecraft/world/inventory/MerchantMenu.java
index 90560dfad263d42432dc034a29930e6bab953b9a..6a529b5e289c416c0ebdc0260086ec039777aa40 100644
--- a/src/main/java/net/minecraft/world/inventory/MerchantMenu.java
+++ b/src/main/java/net/minecraft/world/inventory/MerchantMenu.java
@@ -123,12 +123,12 @@ public class MerchantMenu extends AbstractContainerMenu {
itemstack = itemstack1.copy();
if (slot == 2) {
- if (!this.moveItemStackTo(itemstack1, 3, 39, true)) {
+ if (!this.moveItemStackTo(itemstack1, 3, 39, true, true)) { // Paper - Add PlayerTradeEvent and PlayerPurchaseEvent
return ItemStack.EMPTY;
}
- slot1.onQuickCraft(itemstack1, itemstack);
- this.playTradeSound();
+ // slot1.onQuickCraft(itemstack1, itemstack); // Paper - Add PlayerTradeEvent and PlayerPurchaseEvent; moved to after the non-check moveItemStackTo call
+ // this.playTradeSound();
} else if (slot != 0 && slot != 1) {
if (slot >= 3 && slot < 30) {
if (!this.moveItemStackTo(itemstack1, 30, 39, false)) {
@@ -141,6 +141,7 @@ public class MerchantMenu extends AbstractContainerMenu {
return ItemStack.EMPTY;
}
+ if (slot != 2) { // Paper - Add PlayerTradeEvent and PlayerPurchaseEvent; moved down for slot 2
if (itemstack1.isEmpty()) {
slot1.setByPlayer(ItemStack.EMPTY);
} else {
@@ -152,6 +153,21 @@ public class MerchantMenu extends AbstractContainerMenu {
}
slot1.onTake(player, itemstack1);
+ } // Paper start - Add PlayerTradeEvent and PlayerPurchaseEvent; handle slot 2
+ if (slot == 2) { // is merchant result slot
+ slot1.onTake(player, itemstack1);
+ if (itemstack1.isEmpty()) {
+ slot1.set(ItemStack.EMPTY);
+ return ItemStack.EMPTY;
+ }
+
+ this.moveItemStackTo(itemstack1, 3, 39, true, false); // This should always succeed because it's checked above
+
+ slot1.onQuickCraft(itemstack1, itemstack);
+ this.playTradeSound();
+ slot1.set(ItemStack.EMPTY); // itemstack1 should ALWAYS be empty
+ }
+ // Paper end - Add PlayerTradeEvent and PlayerPurchaseEvent
}
return itemstack;
diff --git a/src/main/java/net/minecraft/world/inventory/MerchantResultSlot.java b/src/main/java/net/minecraft/world/inventory/MerchantResultSlot.java
index 26227033613a641a9d5a6f29356b19e54753b3f1..c2376538215604210d08acd33e8e5fdc8a35c7d3 100644
--- a/src/main/java/net/minecraft/world/inventory/MerchantResultSlot.java
+++ b/src/main/java/net/minecraft/world/inventory/MerchantResultSlot.java
@@ -47,13 +47,32 @@ public class MerchantResultSlot extends Slot {
@Override
public void onTake(Player player, ItemStack stack) {
- this.checkTakeAchievements(stack);
+ // this.checkTakeAchievements(stack); // Paper - Add PlayerTradeEvent and PlayerPurchaseEvent; move to after event is called and not cancelled
MerchantOffer merchantOffer = this.slots.getActiveOffer();
+ // Paper start - Add PlayerTradeEvent and PlayerPurchaseEvent
+ io.papermc.paper.event.player.PlayerPurchaseEvent event = null;
+ if (merchantOffer != null && player instanceof net.minecraft.server.level.ServerPlayer serverPlayer) {
+ if (this.merchant instanceof net.minecraft.world.entity.npc.AbstractVillager abstractVillager) {
+ event = new io.papermc.paper.event.player.PlayerTradeEvent(serverPlayer.getBukkitEntity(), (org.bukkit.entity.AbstractVillager) abstractVillager.getBukkitEntity(), merchantOffer.asBukkit(), true, true);
+ } else if (this.merchant instanceof org.bukkit.craftbukkit.inventory.CraftMerchantCustom.MinecraftMerchant) {
+ event = new io.papermc.paper.event.player.PlayerPurchaseEvent(serverPlayer.getBukkitEntity(), merchantOffer.asBukkit(), false, true);
+ }
+ if (event != null) {
+ if (!event.callEvent()) {
+ stack.setCount(0);
+ event.getPlayer().updateInventory();
+ return;
+ }
+ merchantOffer = org.bukkit.craftbukkit.inventory.CraftMerchantRecipe.fromBukkit(event.getTrade()).toMinecraft();
+ }
+ }
+ this.checkTakeAchievements(stack);
+ // Paper end - Add PlayerTradeEvent and PlayerPurchaseEvent
if (merchantOffer != null) {
ItemStack itemStack = this.slots.getItem(0);
ItemStack itemStack2 = this.slots.getItem(1);
if (merchantOffer.take(itemStack, itemStack2) || merchantOffer.take(itemStack2, itemStack)) {
- this.merchant.notifyTrade(merchantOffer);
+ this.merchant.processTrade(merchantOffer, event); // Paper - Add PlayerTradeEvent and PlayerPurchaseEvent
player.awardStat(Stats.TRADED_WITH_VILLAGER);
this.slots.setItem(0, itemStack);
this.slots.setItem(1, itemStack2);
diff --git a/src/main/java/net/minecraft/world/item/trading/Merchant.java b/src/main/java/net/minecraft/world/item/trading/Merchant.java
index 5a350948a4735902f5c612592bc9d100445a0c8a..716b30dcd7e63c66736c448dd136c9f74dc7fe43 100644
--- a/src/main/java/net/minecraft/world/item/trading/Merchant.java
+++ b/src/main/java/net/minecraft/world/item/trading/Merchant.java
@@ -20,6 +20,7 @@ public interface Merchant {
void overrideOffers(MerchantOffers offers);
+ default void processTrade(MerchantOffer merchantRecipe, @Nullable io.papermc.paper.event.player.PlayerPurchaseEvent event) { this.notifyTrade(merchantRecipe); } // Paper
void notifyTrade(MerchantOffer offer);
void notifyTradeUpdated(ItemStack stack);
diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMerchantCustom.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMerchantCustom.java
index ef47eb9a321a7b082413d3986d3d394afb899610..54debe9da0a26aea02c964fdc7efb372e07974c0 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMerchantCustom.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMerchantCustom.java
@@ -76,10 +76,25 @@ public class CraftMerchantCustom implements CraftMerchant {
return this.trades;
}
+ // Paper start - Add PlayerTradeEvent and PlayerPurchaseEvent
+ @Override
+ public void processTrade(MerchantOffer merchantRecipe, @javax.annotation.Nullable io.papermc.paper.event.player.PlayerPurchaseEvent event) { // The MerchantRecipe passed in here is the one set by the PlayerPurchaseEvent
+ /** Based on {@link net.minecraft.world.entity.npc.AbstractVillager#processTrade(MerchantOffer, io.papermc.paper.event.player.PlayerPurchaseEvent)} */
+ if (getTradingPlayer() instanceof net.minecraft.server.level.ServerPlayer) {
+ if (event == null || event.willIncreaseTradeUses()) {
+ merchantRecipe.increaseUses();
+ }
+ if (event == null || event.isRewardingExp()) {
+ this.tradingPlayer.level().addFreshEntity(new net.minecraft.world.entity.ExperienceOrb(this.tradingPlayer.level(), this.tradingPlayer.getX(), this.tradingPlayer.getY(), this.tradingPlayer.getZ(), merchantRecipe.getXp(), org.bukkit.entity.ExperienceOrb.SpawnReason.VILLAGER_TRADE, this.tradingPlayer, null));
+ }
+ }
+ this.notifyTrade(merchantRecipe);
+ }
+ // Paper end - Add PlayerTradeEvent and PlayerPurchaseEvent
@Override
public void notifyTrade(MerchantOffer offer) {
// increase recipe's uses
- offer.increaseUses();
+ // offer.increaseUses(); // Paper - Add PlayerTradeEvent and PlayerPurchaseEvent; handled above in processTrade
}
@Override
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