Merge pull request #623 from BisUmTo/onTrade-Scarpet-Event

Added onTrade Scarpet Event

src/main/java/carpet/mixins/TradeOutputSlot_scarpetEventMixin.java

@@ -0,0 +1,33 @@
+package carpet.mixins;
+
+import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.item.ItemStack;
+import net.minecraft.screen.slot.TradeOutputSlot;
+import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.village.Merchant;
+import net.minecraft.village.TradeOffer;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+import org.spongepowered.asm.mixin.injection.callback.LocalCapture;
+
+import static carpet.script.CarpetEventServer.Event.PLAYER_TRADES;
+
+@Mixin(value = TradeOutputSlot.class)
+public abstract class TradeOutputSlot_scarpetEventMixin {
+    @Shadow @Final private Merchant merchant;
+
+    @Inject(method = "onTakeItem", at = @At(value = "INVOKE",
+            target = "Lnet/minecraft/village/Merchant;trade(Lnet/minecraft/village/TradeOffer;)V"),
+            locals = LocalCapture.CAPTURE_FAILHARD
+    )
+    private void onTrade(PlayerEntity player, ItemStack stack, CallbackInfoReturnable cir, TradeOffer tradeOffer) {
+        if(PLAYER_TRADES.isNeeded() && !this.merchant.getMerchantWorld().isClient())
+        {
+            PLAYER_TRADES.onTrade((ServerPlayerEntity) player, merchant, tradeOffer);
+        }
+    }
+}

src/main/java/carpet/script/CarpetEventServer.java

@@ -18,6 +18,7 @@ import com.mojang.brigadier.exceptions.CommandSyntaxException;
 import net.minecraft.block.BlockState;
 import net.minecraft.entity.EntityType;
 import net.minecraft.entity.damage.DamageSource;
+import net.minecraft.entity.passive.MerchantEntity;
 import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.command.ServerCommandSource;
 import net.minecraft.entity.Entity;
@@ -35,6 +36,8 @@ import net.minecraft.util.math.Direction;
 import net.minecraft.util.math.Vec3d;
 import net.minecraft.util.registry.Registry;
 import net.minecraft.util.registry.RegistryKey;
+import net.minecraft.village.Merchant;
+import net.minecraft.village.TradeOffer;
 import net.minecraft.world.World;
 import net.minecraft.world.chunk.Chunk;
 import org.apache.commons.lang3.tuple.Pair;
@@ -548,6 +551,20 @@ public class CarpetEventServer
                 ), player::getCommandSource);
             }
         };
+        public static final Event PLAYER_TRADES = new Event("player_trades", 5, false)
+        {
+            @Override
+            public void onTrade(ServerPlayerEntity player, Merchant merchant, TradeOffer tradeOffer)
+            {
+                handler.call( () -> Arrays.asList(
+                        new EntityValue(player),
+                        merchant instanceof MerchantEntity ? new EntityValue((MerchantEntity) merchant) : Value.NULL,
+                        ValueConversions.of(tradeOffer.getOriginalFirstBuyItem()),
+                        ValueConversions.of(tradeOffer.getSecondBuyItem()),
+                        ValueConversions.of(tradeOffer.getSellItem())
+                ), player::getCommandSource);
+            }
+        };
         public static final Event PLAYER_PICKS_UP_ITEM = new Event("player_picks_up_item", 2, false)
         {
             @Override
@@ -926,6 +943,7 @@ public class CarpetEventServer
         public void onDamage(Entity target, float amount, DamageSource source) { }
         public void onRecipeSelected(ServerPlayerEntity player, Identifier recipe, boolean fullStack) {}
         public void onSlotSwitch(ServerPlayerEntity player, int from, int to) {}
+        public void onTrade(ServerPlayerEntity player, Merchant merchant, TradeOffer tradeOffer) {}
 
 
         public void onWorldEvent(ServerWorld world, BlockPos pos) { }