added options for drop command

src/main/java/carpet/commands/PlayerCommand.java

@@ -53,7 +53,9 @@ public class PlayerCommand
                         .then(makeActionCommand("jump", EntityPlayerActionPack.ActionType.JUMP))
                         .then(makeActionCommand("attack", EntityPlayerActionPack.ActionType.ATTACK))
                         .then(makeActionCommand("drop", EntityPlayerActionPack.ActionType.DROP_ITEM))
+                        .then(makeDropCommand("drop", false))
                         .then(makeActionCommand("dropStack", EntityPlayerActionPack.ActionType.DROP_STACK))
+                        .then(makeDropCommand("dropStack", true))
                         .then(makeActionCommand("swapHands", EntityPlayerActionPack.ActionType.SWAP_HANDS))
                         .then(literal("kill").executes(PlayerCommand::kill))
                         .then(literal("shadow"). executes(PlayerCommand::shadow))
@@ -105,6 +107,19 @@ public class PlayerCommand
                         .executes(c -> action(c, type, EntityPlayerActionPack.Action.interval(IntegerArgumentType.getInteger(c, "ticks"))))));
     }
 
+    private static LiteralArgumentBuilder<ServerCommandSource> makeDropCommand(String actionName, boolean dropAll)
+    {
+        return literal(actionName)
+                .then(literal("all").executes(c ->manipulate(c, ap -> ap.drop(-2,dropAll))))
+                .then(literal("mainhand").executes(c ->manipulate(c, ap -> ap.drop(-1,dropAll))))
+                .then(literal("offhand").executes(c ->manipulate(c, ap -> ap.drop(40,dropAll))))
+                .then(argument("slot", IntegerArgumentType.integer(0, 40)).
+                        executes(c ->manipulate(c, ap -> ap.drop(
+                                IntegerArgumentType.getInteger(c,"slot"),
+                                dropAll
+                        ))));
+    }
+
     private static Collection<String> getPlayers(ServerCommandSource source)
     {
         Set<String> players = Sets.newLinkedHashSet(Arrays.asList("Steve", "Alex"));

src/main/java/carpet/helpers/EntityPlayerActionPack.java

@@ -4,6 +4,7 @@ import carpet.fakes.ServerPlayerEntityInterface;
 import net.minecraft.block.BlockState;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.passive.HorseBaseEntity;
+import net.minecraft.entity.player.PlayerInventory;
 import net.minecraft.entity.vehicle.BoatEntity;
 import net.minecraft.entity.vehicle.MinecartEntity;
 import net.minecraft.item.ItemStack;
@@ -222,6 +223,31 @@ public class EntityPlayerActionPack
         return Tracer.rayTrace(player, 1, reach, false);
     }
 
+    private void dropItemFromSlot(int slot, boolean dropAll)
+    {
+        PlayerInventory inv = player.inventory;
+        if (!inv.getInvStack(slot).isEmpty())
+            player.dropItem(inv.takeInvStack(slot,
+                    dropAll ? inv.getInvStack(slot).getCount() : 1
+            ), false, true); // scatter, keep owner
+    }
+
+    public void drop(int selectedSlot, boolean dropAll)
+    {
+        PlayerInventory inv = player.inventory;
+        if (selectedSlot == -2) // all
+        {
+            for (int i = inv.getInvSize(); i >= 0; i--)
+                dropItemFromSlot(i, dropAll);
+        }
+        else // one slot
+        {
+            if (selectedSlot == -1)
+                selectedSlot = inv.selectedSlot;
+            dropItemFromSlot(selectedSlot, dropAll);
+        }
+    }
+
     public enum ActionType
     {
         USE(true)