add interaction permission checks (closes #39)

Author: UpcraftLP

src/main/java/dev/cammiescorner/camsbackpacks/common/blocks/BackpackBlock.java

@@ -2,9 +2,12 @@
 
 import dev.cammiescorner.camsbackpacks.common.blocks.entities.BackpackBlockEntity;
 import dev.cammiescorner.camsbackpacks.core.BackpacksConfig;
+import net.minecraft.ChatFormatting;
 import net.minecraft.core.BlockPos;
 import net.minecraft.core.Direction;
 import net.minecraft.nbt.CompoundTag;
+import net.minecraft.network.chat.Component;
+import net.minecraft.server.level.ServerPlayer;
 import net.minecraft.sounds.SoundEvents;
 import net.minecraft.sounds.SoundSource;
 import net.minecraft.world.*;
@@ -68,6 +71,12 @@ public void setPlacedBy(Level world, BlockPos pos, BlockState state, @Nullable L
     @Override
     public InteractionResult use(BlockState state, Level world, BlockPos pos, Player player, InteractionHand hand, BlockHitResult hit) {
         if (!world.isClientSide()) {
+            if(!world.mayInteract(player, pos)) {
+                ((ServerPlayer) player).sendSystemMessage(Component.translatable("error.camsbackpacks.permission_use").withStyle(ChatFormatting.RED), true);
+                return InteractionResult.FAIL;
+            }
+
+
             if (BackpacksConfig.sneakPlaceBackpack && player.isShiftKeyDown() && player.getItemBySlot(EquipmentSlot.CHEST).isEmpty()) {
                 if (world.getBlockEntity(pos) instanceof BackpackBlockEntity blockEntity) {
                     ItemStack stack = new ItemStack(this);
@@ -92,7 +101,7 @@ public InteractionResult use(BlockState state, Level world, BlockPos pos, Player
             }
         }
 
-        return InteractionResult.SUCCESS;
+        return InteractionResult.sidedSuccess(world.isClientSide());
     }
 
     @Override

src/main/java/dev/cammiescorner/camsbackpacks/common/network/EquipBackpackPacket.java

@@ -4,12 +4,14 @@
 import dev.cammiescorner.camsbackpacks.common.blocks.BackpackBlock;
 import dev.cammiescorner.camsbackpacks.common.blocks.entities.BackpackBlockEntity;
 import dev.cammiescorner.camsbackpacks.common.items.BackpackItem;
-import dev.cammiescorner.camsbackpacks.common.screen.BackpackScreenHandler;
 import dev.cammiescorner.camsbackpacks.core.util.BackpackHelper;
 import io.netty.buffer.Unpooled;
+import net.minecraft.ChatFormatting;
 import net.minecraft.core.BlockPos;
 import net.minecraft.nbt.CompoundTag;
 import net.minecraft.network.FriendlyByteBuf;
+import net.minecraft.network.chat.Component;
+import net.minecraft.network.chat.MutableComponent;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.level.ServerPlayer;
@@ -22,7 +24,6 @@
 import net.minecraft.world.level.Level;
 import net.minecraft.world.level.block.state.properties.BlockStateProperties;
 import org.quiltmc.qsl.networking.api.PacketSender;
-import org.quiltmc.qsl.networking.api.PlayerLookup;
 import org.quiltmc.qsl.networking.api.client.ClientPlayNetworking;
 
 public class EquipBackpackPacket {
@@ -42,6 +43,15 @@ public static void handle(MinecraftServer server, ServerPlayer player, ServerGam
         server.execute(() -> {
             Level world = player.level();
 
+            if (!world.mayInteract(player, pos)) {
+                player.closeContainer();
+                MutableComponent message = isBlockEntity
+                        ? Component.translatable("error.camsbackpacks.permission_pickup_at")
+                        : Component.translatable("error.camsbackpacks.permission_place_at");
+                player.sendSystemMessage(message.withStyle(ChatFormatting.RED), true);
+                return;
+            }
+
             if (isBlockEntity) {
                 if (world.getBlockEntity(pos) instanceof BackpackBlockEntity blockEntity) {
                     ItemStack stack = new ItemStack(world.getBlockState(pos).getBlock().asItem());
@@ -55,10 +65,7 @@ public static void handle(MinecraftServer server, ServerPlayer player, ServerGam
                         stack.setHoverName(blockEntity.getName());
 
                     world.destroyBlock(pos, false, player);
-                    PlayerLookup.tracking(blockEntity).forEach(playerEntity -> {
-                        if (playerEntity.containerMenu instanceof BackpackScreenHandler handler && handler.blockPos.equals(pos))
-                            playerEntity.closeContainer();
-                    });
+
                 }
             } else {
                 ItemStack stack = player.getItemBySlot(EquipmentSlot.CHEST);

src/main/java/dev/cammiescorner/camsbackpacks/common/network/PlaceBackpackPacket.java

@@ -6,8 +6,10 @@
 import dev.cammiescorner.camsbackpacks.common.items.BackpackItem;
 import dev.cammiescorner.camsbackpacks.core.util.BackpackHelper;
 import io.netty.buffer.Unpooled;
+import net.minecraft.ChatFormatting;
 import net.minecraft.core.BlockPos;
 import net.minecraft.network.FriendlyByteBuf;
+import net.minecraft.network.chat.Component;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.level.ServerPlayer;
@@ -38,6 +40,13 @@ public static void handle(MinecraftServer server, ServerPlayer player, ServerGam
         server.execute(() -> {
             Level world = player.level();
             BlockPos pos = BackpackHelper.isReplaceable(world, hitResult.getBlockPos()) ? hitResult.getBlockPos() : hitResult.getBlockPos().relative(hitResult.getDirection());
+
+            if(!world.mayInteract(player, pos)) {
+                player.closeContainer();
+                player.sendSystemMessage(Component.translatable("error.camsbackpacks.permission_place_at").withStyle(ChatFormatting.RED), true);
+                return;
+            }
+
             ItemStack stack = player.getItemBySlot(EquipmentSlot.CHEST);
 
             if (BackpackHelper.isReplaceable(world, pos)) {

src/main/resources/assets/camsbackpacks/lang/en_us.json

@@ -43,6 +43,11 @@
 	"container.camsbackpacks.player_inv": "Inventory",
 	"container.camsbackpacks.backpack_inv": "Backpack",
 
+	// Error Messages
+	"error.camsbackpacks.permission_place_at": "You do not have permission to place a backpack at this location!",
+	"error.camsbackpacks.permission_pickup_at": "You do not have permission to pick up a backpack at this location!",
+	"error.camsbackpacks.permission_use": "You do not have permission to use this backpack!",
+
 	// Config
 	"camsbackpacks.midnightconfig.title": "CamsBackpacks",
 	"camsbackpacks.midnightconfig.sneakPlaceBackpack": "Enable Sneak-Placing Backpacks"