BauSystem_Main/src/de/steamwar/bausystem/features/world/SignEditFrom20.java

@@ -22,6 +22,7 @@ package de.steamwar.bausystem.features.world;
 import com.comphenix.tinyprotocol.Reflection;
 import com.comphenix.tinyprotocol.TinyProtocol;
 import de.steamwar.bausystem.BauSystem;
+import de.steamwar.bausystem.utils.PlaceItemUtils;
 import de.steamwar.linkage.Linked;
 import de.steamwar.linkage.MinVersion;
 import org.bukkit.Bukkit;
@@ -65,11 +66,14 @@ public class SignEditFrom20 implements Listener {
     @EventHandler
     public void editSign(PlayerInteractEvent event) {
         if (event.getClickedBlock() == null || !event.getClickedBlock().getType().name().contains("SIGN")) return;
-        if (event.getAction() == Action.RIGHT_CLICK_BLOCK) event.setCancelled(true);
-        if (!event.getPlayer().isSneaking()) return;
+        if (event.getAction() == Action.RIGHT_CLICK_BLOCK && !event.getPlayer().isSneaking()) {
+            PlaceItemUtils.placeItem(event.getPlayer(), event.getItem(), event.getClickedBlock(), event.getBlockFace(), event.getHand(), false, true, false);
             event.setCancelled(true);
+        }
+        if (!event.getPlayer().isSneaking()) return;
 
         if (event.getAction() == Action.RIGHT_CLICK_BLOCK && (event.getItem() == null || event.getItem().getType() == Material.AIR) || event.getAction() == Action.LEFT_CLICK_BLOCK) {
+            event.setCancelled(true);
             Bukkit.getScheduler().runTaskLater(BauSystem.getInstance(), () -> {
                 edit(event.getPlayer(), event.getClickedBlock());
             }, 1);

BauSystem_Main/src/de/steamwar/bausystem/utils/PlaceItemUtils.java

@@ -0,0 +1,478 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2023  SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program 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 Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.bausystem.utils;
+
+import com.comphenix.tinyprotocol.Reflection;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.experimental.UtilityClass;
+import org.bukkit.*;
+import org.bukkit.block.*;
+import org.bukkit.block.data.*;
+import org.bukkit.block.data.type.Hopper;
+import org.bukkit.block.data.type.Observer;
+import org.bukkit.block.data.type.*;
+import org.bukkit.entity.Player;
+import org.bukkit.event.block.BlockCanBuildEvent;
+import org.bukkit.event.block.BlockPlaceEvent;
+import org.bukkit.inventory.EquipmentSlot;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.*;
+import org.bukkit.util.RayTraceResult;
+import org.bukkit.util.Vector;
+
+import java.util.*;
+
+@UtilityClass
+public class PlaceItemUtils {
+
+    private static final Map<Material, Material> ITEM_MATERIAL_TO_BLOCK_MATERIAL = new HashMap<>();
+    private static final Map<Material, Material> BLOCK_MATERIAL_TO_WALL_BLOCK_MATERIAL = new HashMap<>();
+
+    static {
+        for (Material material : Material.values()) {
+            if (!material.isBlock()) continue;
+            if (material.isLegacy()) continue;
+            BlockData blockData = material.createBlockData();
+            Material placementMaterial = blockData.getPlacementMaterial();
+            if (material == placementMaterial) continue;
+            if (placementMaterial == Material.AIR) continue;
+            if (placementMaterial.isItem() && !placementMaterial.isBlock()) {
+                ITEM_MATERIAL_TO_BLOCK_MATERIAL.put(placementMaterial, material);
+            }
+            if (material.name().contains("WALL")) {
+                BLOCK_MATERIAL_TO_WALL_BLOCK_MATERIAL.put(placementMaterial, material);
+            }
+        }
+    }
+
+    private static final Class<?> blockPosition = Reflection.getClass("{nms.core}.BlockPosition");
+    private static final Reflection.ConstructorInvoker blockPositionConstructor = Reflection.getConstructor(blockPosition, int.class, int.class, int.class);
+    private static final Class<?> craftBlock = Reflection.getClass("{obc}.block.CraftBlockState");
+    private static final Class<?> craftWorld = Reflection.getClass("{obc}.CraftWorld");
+    private static final Reflection.FieldAccessor<?> positionAccessor = Reflection.getField(craftBlock, blockPosition, 0);
+    private static final Reflection.FieldAccessor<?> worldAccessor = Reflection.getField(craftBlock, craftWorld, 0);
+
+    /**
+     * Attempt to place an {@link ItemStack} the {@link Player} is holding against a {@link Block} inside the World.
+     * This can be easily used inside the {@link org.bukkit.event.player.PlayerInteractEvent} to mimik placing a
+     * block without any minecraft related GUI's etc. executing.
+     *
+     * @param player the Player placing the block
+     * @param itemStack the ItemStack to be placed
+     * @param against the Block at which the player aims (does not need to be in range of the player)
+     * @param againstSide the BlockFace the player aims
+     * @param hand the Hand the player is using
+     * @param force allow illegal states to be created by placing the block
+     * @param applyPhysics apply physics while placing the block
+     * @param rotateAway rotate everything in the opposite direction, so a block facing the Player will face away, and the other way round
+     */
+    public PlaceItemResult placeItem(Player player, ItemStack itemStack, Block against, BlockFace againstSide, EquipmentSlot hand, boolean force, boolean applyPhysics, boolean rotateAway) {
+        // If the ItemStack is null or air we cannot place it
+        if (itemStack == null) return PlaceItemResult.NO_ITEM_HELD;
+        if (itemStack.getType().isAir()) return PlaceItemResult.NO_ITEM_HELD;
+
+        // This Block should be replaced by the new Block
+        Block block = against.getRelative(againstSide);
+
+        // We cannot place any Item that is not also a Block, this is checked by testing for the ItemMeta
+        ItemMeta itemMeta = itemStack.getItemMeta();
+        if (!(itemMeta instanceof BlockDataMeta)) {
+            return PlaceItemResult.NO_BLOCK_ITEM_HELD;
+        }
+
+        BlockDataMeta blockDataMeta = (BlockDataMeta) itemMeta;
+
+        // Converting the Item Material to a Block Material
+        // e.g. Material.REDSTONE -> Material.REDSTONE_WIRE
+        Material typeToPlace = ITEM_MATERIAL_TO_BLOCK_MATERIAL.getOrDefault(itemStack.getType(), itemStack.getType());
+
+        BlockData blockData = null;
+        if (againstSide == BlockFace.NORTH || againstSide == BlockFace.SOUTH || againstSide == BlockFace.EAST || againstSide == BlockFace.WEST) {
+            // Try Wall Placement first
+            blockData = toBlockData(player, blockDataMeta, BLOCK_MATERIAL_TO_WALL_BLOCK_MATERIAL.getOrDefault(typeToPlace, typeToPlace));
+            if (blockData != null && !canPlace(block, blockData, force)) {
+                // Check if default Rotation from input could be valid
+                BlockFace rotation = getRotation(blockData);
+                setRotation(blockData, againstSide);
+                if (!canPlace(block, blockData, force)) {
+                    setRotation(blockData, rotation);
+                }
+            }
+        }
+
+        // Try default Placement
+        if (blockData == null || !canPlace(block, blockData, force)) {
+            blockData = toBlockData(player, blockDataMeta, typeToPlace);
+        }
+
+        if (blockData != null && !canPlace(block, blockData, force)) {
+            if (blockData instanceof FaceAttachable) {
+                // FaceAttachable Blocks should be placed on the Ceiling/Floor if possible
+                // This applies mainly to Lever and Buttons
+                FaceAttachable faceAttachable = (FaceAttachable) blockData;
+                boolean topFirst = isHitHalfTop(player);
+                faceAttachable.setAttachedFace(topFirst ? FaceAttachable.AttachedFace.CEILING : FaceAttachable.AttachedFace.FLOOR);
+                if (!canPlace(block, blockData, force)) {
+                    faceAttachable.setAttachedFace(topFirst ? FaceAttachable.AttachedFace.FLOOR : FaceAttachable.AttachedFace.CEILING);
+                }
+                if (!canPlace(block, blockData, force)) {
+                    return PlaceItemResult.NO_VALID_PLACEMENT;
+                }
+            }
+            if (blockData instanceof Switch) {
+                // Levers and Buttons are always Rotated the other way
+                Switch switchType = (Switch) blockData;
+                switch (switchType.getAttachedFace()) {
+                    case FLOOR:
+                    case CEILING:
+                        switchType.setFacing(switchType.getFacing().getOppositeFace());
+                        break;
+                }
+            }
+        }
+
+        if (blockData == null) return PlaceItemResult.NO_BLOCK_ITEM_HELD;
+
+        // Placing a Block inside of Water should set it to Waterlogged
+        if (blockData instanceof Waterlogged) {
+            ((Waterlogged) blockData).setWaterlogged(block.getType() == Material.WATER);
+        }
+
+        if (blockData instanceof Slab) {
+            // Slabs can be set at Top or Bottom
+            ((Slab) blockData).setType(isHitHalfTop(player) ? Slab.Type.TOP : Slab.Type.BOTTOM);
+        } else if (blockData instanceof Stairs) {
+            // Stairs can be set at Top or Bottom
+            ((Stairs) blockData).setHalf(isHitHalfTop(player) ? Bisected.Half.TOP : Bisected.Half.BOTTOM);
+        } else if (blockData instanceof TrapDoor) {
+            // TrapDoors can be set at Top or Bottom
+            ((TrapDoor) blockData).setHalf(isHitHalfTop(player) ? Bisected.Half.TOP : Bisected.Half.BOTTOM);
+        } else if (blockData instanceof Chain) {
+            // Chains are always rotated against the block you place against
+            Orientable orientable = (Orientable) blockData;
+            switch (againstSide) {
+                case EAST:
+                case WEST:
+                    orientable.setAxis(Axis.X);
+                    break;
+                case UP:
+                case DOWN:
+                    orientable.setAxis(Axis.Y);
+                    break;
+                case NORTH:
+                case SOUTH:
+                    orientable.setAxis(Axis.Z);
+                    break;
+            }
+        } else if (blockData instanceof Hopper && (againstSide == BlockFace.UP || againstSide == BlockFace.DOWN)) {
+            // Placing at the Top or Bottom of a Block result in a downwards facing Hopper
+            ((Hopper) blockData).setFacing(BlockFace.DOWN);
+        } else if (blockData instanceof Directional && (blockData.getMaterial().name().endsWith("_HEAD") || blockData.getMaterial().name().endsWith("_SKULL")) && againstSide != BlockFace.DOWN && againstSide != BlockFace.UP) {
+            // Skulls and Heads are always rotated towards you if not in Wall variant
+            ((Directional) blockData).setFacing(againstSide);
+        } else if (blockData instanceof LightningRod) {
+            // Lightning Rod is always rotated against the block you place against
+            ((Directional) blockData).setFacing(againstSide);
+        }
+        if (force && blockData instanceof Switch) {
+            // Forcing to Place a switch against the Block you specified. Needs the force flag to be set
+            Switch switchType = (Switch) blockData;
+            if (againstSide == BlockFace.DOWN) {
+                switchType.setAttachedFace(FaceAttachable.AttachedFace.CEILING);
+            } else if (againstSide == BlockFace.UP) {
+                switchType.setAttachedFace(FaceAttachable.AttachedFace.FLOOR);
+            } else {
+                switchType.setFacing(againstSide);
+            }
+        }
+
+        if (blockData instanceof RedstoneWire) {
+            // Redstone Wire is connected to every Side by default
+            RedstoneWire redstoneWire = (RedstoneWire) blockData;
+            redstoneWire.setFace(BlockFace.NORTH, RedstoneWire.Connection.SIDE);
+            redstoneWire.setFace(BlockFace.SOUTH, RedstoneWire.Connection.SIDE);
+            redstoneWire.setFace(BlockFace.EAST, RedstoneWire.Connection.SIDE);
+            redstoneWire.setFace(BlockFace.WEST, RedstoneWire.Connection.SIDE);
+        }
+
+        if (rotateAway) {
+            // Rotate the other way if rotateAway is set to true
+            BlockFace blockFace = getRotation(blockData);
+            if (blockFace != null) {
+                blockFace = blockFace.getOppositeFace();
+                if (blockData instanceof Hopper && (blockFace == BlockFace.UP || blockFace == BlockFace.DOWN)) {
+                    ((Hopper) blockData).setFacing(BlockFace.DOWN);
+                } else {
+                    setRotation(blockData, blockFace);
+                }
+            }
+        }
+
+        // Check if the Block can be build
+        BlockCanBuildEvent blockCanBuildEvent = new BlockCanBuildEvent(against, player, blockData, canPlace(block, blockData, force));
+        Bukkit.getPluginManager().callEvent(blockCanBuildEvent);
+        if (!blockCanBuildEvent.isBuildable()) return PlaceItemResult.NO_BUILD;
+
+        BlockState oldState = block.getState();
+
+        // Retrieve the BlockState of the ItemStack if present
+        BlockState blockState = null;
+        if (itemMeta instanceof BlockStateMeta) {
+            blockState = ((BlockStateMeta) itemMeta).getBlockState();
+        }
+
+        if (blockState == null) {
+            // If no BlockState is present use the BlockState of the Block you want to edit
+            blockState = block.getState();
+        } else {
+            // If a BlockState is present set the Position and World to the Block you want to place
+            Location blockLocation = block.getLocation();
+            positionAccessor.set(blockState, blockPositionConstructor.invoke(blockLocation.getBlockX(), blockLocation.getBlockY(), blockLocation.getBlockZ()));
+            worldAccessor.set(blockState, blockLocation.getWorld());
+        }
+
+        // Set the generated BlockData to the BlockState and update the world without physics
+        blockState.setBlockData(blockData);
+        blockState.update(true, false);
+
+        // Check if the Block is allowed to be placed
+        BlockPlaceEvent blockPlaceEvent = new BlockPlaceEvent(block, oldState, against, itemStack, player, true, hand);
+        Bukkit.getPluginManager().callEvent(blockCanBuildEvent);
+        if (blockPlaceEvent.isCancelled() || !blockPlaceEvent.canBuild()) {
+            // Reset world
+            oldState.update(true, false);
+            return PlaceItemResult.NO_PLACE;
+        }
+
+        if (hasSecondBlock(blockData)) {
+            // Place tht second block of a Door or Tallgrass.
+            Bisected bisected = (Bisected) blockData;
+            Block blockAbove = block.getRelative(0, 1, 0);
+            bisected.setHalf(Bisected.Half.TOP);
+            if (canPlace(blockAbove, blockData, force)) {
+                if (blockData instanceof Waterlogged) {
+                    ((Waterlogged) blockData).setWaterlogged(blockAbove.getType() == Material.WATER);
+                }
+                blockAbove.setBlockData(blockData, applyPhysics);
+            } else {
+                // If the second Block couldn't be placed remove the first Block as well
+                oldState.update(true, false);
+                return PlaceItemResult.NO_DOUBLE_HIGH_BLOCK_SPACE;
+            }
+        }
+        if (applyPhysics) {
+            // Apply Physics by placing the old State without Physics and setting the new with physics
+            oldState.update(true, false);
+            blockState.update(true, true);
+        }
+
+        if (itemMeta instanceof BannerMeta) {
+            // Apply Banner Patterns to now placed Block in World
+            BannerMeta bannerMeta = (BannerMeta) itemMeta;
+            Banner banner = (Banner) block.getState();
+            banner.setPatterns(bannerMeta.getPatterns());
+            banner.update(true, false);
+        } else if (itemMeta instanceof SkullMeta) {
+            // Apply Skull Data to now placed Block in World
+            SkullMeta skullMeta = (SkullMeta) itemMeta;
+            Skull skull = (Skull) block.getState();
+            skull.setOwnerProfile(skullMeta.getOwnerProfile());
+            skull.setOwningPlayer(skullMeta.getOwningPlayer());
+            skull.update(true, false);
+        }
+
+        // Play the corresponding sound of placing the now placed Block
+        SoundGroup soundGroup = blockData.getSoundGroup();
+        block.getWorld().playSound(block.getLocation(), soundGroup.getPlaceSound(), soundGroup.getVolume() * 0.8F, soundGroup.getPitch() * 0.8F);
+        return PlaceItemResult.SUCCESS;
+    }
+
+    public BlockFace[] axis = { BlockFace.NORTH, BlockFace.EAST, BlockFace.SOUTH, BlockFace.WEST };
+    public BlockFace[] radial = { BlockFace.NORTH, BlockFace.NORTH_EAST, BlockFace.EAST, BlockFace.SOUTH_EAST, BlockFace.SOUTH, BlockFace.SOUTH_WEST, BlockFace.WEST, BlockFace.NORTH_WEST };
+
+    public BlockFace yawToFace(float yaw) {
+        return radial[Math.round(yaw / 45f) & 0x7];
+    }
+
+    public BlockFace yawToFaceAxis(float yaw) {
+        return axis[Math.round(yaw / 90f) & 0x3];
+    }
+
+    public BlockFace toFace(Set<BlockFace> faces, float pitch, float yaw) {
+        if (faces.contains(BlockFace.UP) && pitch >= 45.0) {
+            return BlockFace.UP;
+        }
+        if (faces.contains(BlockFace.DOWN) && pitch <= -45.0) {
+            return BlockFace.DOWN;
+        }
+        return yawToFaceAxis(yaw);
+    }
+
+    public BlockData toBlockData(Player player, BlockDataMeta blockDataMeta, Material material) {
+        BlockData blockData;
+        try {
+            blockData = blockDataMeta.getBlockData(material);
+        } catch (NullPointerException e) {
+            // Some items have a BlockDataMeta but they cannot be converted to one like ItemFrame, those will be ignored
+            return null;
+        }
+
+        if (blockData instanceof Stairs || blockData instanceof Observer || blockData instanceof Hopper || blockData instanceof Door) {
+            // Stairs, Observer, Hopper and Doors are placed the opposite way
+            Directional directional = (Directional) blockData;
+            BlockFace face = toFace(directional.getFaces(), player.getLocation().getPitch(), player.getLocation().getYaw());
+            directional.setFacing(face.getOppositeFace());
+        } else if (blockData instanceof Orientable) {
+            // Orientable only have 3 Axis: X, Y, Z
+            Orientable orientable = (Orientable) blockData;
+            Set<BlockFace> faces = new HashSet<>();
+            Set<Axis> axisSet = orientable.getAxes();
+            if (axisSet.contains(Axis.X)) {
+                faces.add(BlockFace.EAST);
+                faces.add(BlockFace.WEST);
+            }
+            if (axisSet.contains(Axis.Y)) {
+                faces.add(BlockFace.UP);
+                faces.add(BlockFace.DOWN);
+            }
+            if (axisSet.contains(Axis.Z)) {
+                faces.add(BlockFace.NORTH);
+                faces.add(BlockFace.SOUTH);
+            }
+            BlockFace face = toFace(faces, player.getLocation().getPitch(), player.getLocation().getYaw());
+            switch (face) {
+                case EAST:
+                case WEST:
+                    orientable.setAxis(Axis.X);
+                    break;
+                case UP:
+                case DOWN:
+                    orientable.setAxis(Axis.Y);
+                    break;
+                case NORTH:
+                case SOUTH:
+                    orientable.setAxis(Axis.Z);
+                    break;
+            }
+        } else if (blockData instanceof Rotatable) {
+            Rotatable rotatable = (Rotatable) blockData;
+            BlockFace blockeFace = yawToFace(player.getLocation().getYaw());
+            if (blockData.getMaterial().name().endsWith("_HEAD") || blockData.getMaterial().name().endsWith("_SKULL")) {
+                // Wall Heads and Wall Skulls are placed the opposite way
+                rotatable.setRotation(blockeFace.getOppositeFace());
+            } else {
+                rotatable.setRotation(blockeFace);
+            }
+        } else if (blockData instanceof Directional) {
+            Directional directional = (Directional) blockData;
+            directional.setFacing(toFace(directional.getFaces(), player.getLocation().getPitch(), player.getLocation().getYaw()));
+        } else if (blockData instanceof Rail) {
+            Rail rail = (Rail) blockData;
+            BlockFace face = yawToFaceAxis(player.getLocation().getYaw());
+            // Rails are only represented by 2 States, North_South or East_West the remaining States will be ignored here
+            rail.setShape(face == BlockFace.NORTH || face == BlockFace.SOUTH ? Rail.Shape.NORTH_SOUTH : Rail.Shape.EAST_WEST);
+        }
+
+        return blockData;
+    }
+
+    private BlockFace getRotation(BlockData blockData) {
+        if (blockData instanceof Rotatable) {
+            return ((Rotatable) blockData).getRotation();
+        } else if (blockData instanceof Directional) {
+            return ((Directional) blockData).getFacing();
+        } else if (blockData instanceof Rail) {
+            Rail rail = (Rail) blockData;
+            switch (rail.getShape()) {
+                case NORTH_SOUTH:
+                    return BlockFace.NORTH;
+                case EAST_WEST:
+                    return BlockFace.EAST;
+            }
+        }
+        return null;
+    }
+
+    private void setRotation(BlockData blockData, BlockFace rotation) {
+        if (blockData instanceof Rotatable) {
+            ((Rotatable) blockData).setRotation(rotation);
+        } else if (blockData instanceof Directional) {
+            ((Directional) blockData).setFacing(rotation);
+        } else if (blockData instanceof Rail) {
+            Rail rail = (Rail) blockData;
+            switch (rotation) {
+                case NORTH:
+                case SOUTH:
+                    rail.setShape(Rail.Shape.NORTH_SOUTH);
+                    break;
+                case EAST:
+                case WEST:
+                    rail.setShape(Rail.Shape.EAST_WEST);
+                    break;
+            }
+        }
+    }
+
+    private boolean isHitHalfTop(Player player) {
+        RayTraceResult rayTraceResult = player.rayTraceBlocks(6, FluidCollisionMode.NEVER);
+        if (rayTraceResult != null) {
+            Vector vector = rayTraceResult.getHitPosition();
+            return (vector.getY() - vector.getBlockY()) > 0.5;
+        }
+        return false;
+    }
+
+    private boolean hasSecondBlock(BlockData blockData) {
+        if (!(blockData instanceof Bisected)) {
+            return false;
+        }
+        if (blockData instanceof Door) {
+            return true;
+        }
+        return blockData.getClass().getName().contains("Tall");
+    }
+
+    private boolean canPlace(Block block, BlockData blockData, boolean force) {
+        if (!force && !block.canPlace(blockData)) return false;
+        if (block.getType().name().equals("LIGHT")) return true;
+        if (block.getType().isSolid()) return false;
+        if (block.getType() == Material.LADDER) return false;
+        if (block.getType() == Material.SCAFFOLDING) return false;
+        if (block.getType() == Material.LEVER) return false;
+        if (block.getType().name().endsWith("_BUTTON")) return false;
+        return block.getPistonMoveReaction() == PistonMoveReaction.BREAK || block.isEmpty();
+    }
+
+    @AllArgsConstructor
+    @Getter
+    public enum PlaceItemResult {
+        NO_ITEM_HELD(false),
+        NO_BLOCK_ITEM_HELD(false),
+        NO_VALID_PLACEMENT(false),
+        NO_BUILD(false),
+        NO_PLACE(false),
+        NO_DOUBLE_HIGH_BLOCK_SPACE(false),
+        SUCCESS(true),
+        ;
+
+        private final boolean success;
+    }
+}