Exposes 'load default aliases' config option and removes hardcoded alias dependencies

src/main/java/ch/njol/skript/aliases/Aliases.java

@@ -25,6 +25,7 @@
 import ch.njol.skript.config.Node;
 import ch.njol.skript.config.SectionNode;
 import ch.njol.skript.entity.EntityData;
+import org.bukkit.entity.EntityType;
 import org.skriptlang.skript.lang.script.Script;
 import ch.njol.skript.lang.parser.ParserInstance;
 import ch.njol.skript.localization.ArgsMessage;
@@ -431,7 +432,6 @@ private static void loadInternal() throws IOException {
 					Path aliasesPath = zipFs.getPath("/", "aliases-english");
 					assert aliasesPath != null;
 					loadDirectory(aliasesPath);
-					loadMissingAliases();
 				}
 			} catch (URISyntaxException e) {
 				assert false;
@@ -445,6 +445,9 @@ private static void loadInternal() throws IOException {
 			assert aliasesFolder != null;
 			loadDirectory(aliasesFolder);
 		}
+
+		// generate aliases from item names for any missing items
+		loadMissingAliases();
 
 		// Update tracked item types
 		for (Map.Entry<String, ItemType> entry : trackedTypes.entrySet()) {
@@ -554,10 +557,16 @@ public static EntityData<?> getRelatedEntity(ItemData data) {
 	 * <p>Item types provided by this method are updated when aliases are
 	 * reloaded. However, this also means they are tracked by aliases system
 	 * and NOT necessarily garbage-collected.
+	 *
+	 * <p>Relying on this method to create item types is not safe,
+	 * as users can change aliases at any point. ItemTypes should instead be created
+	 * via {@link Material}s, {@link org.bukkit.Tag}s, or any other manual method.
+	 *
 	 * @param name Name of item to search from aliases.
 	 * @return An item.
 	 * @throws IllegalArgumentException When item is not found.
 	 */
+	@Deprecated(forRemoval = true, since = "2.9.0")
 	public static ItemType javaItemType(String name) {
 		ItemType type = parseItemType(name);
 		if (type == null) {

src/main/java/ch/njol/skript/aliases/ItemType.java

@@ -40,6 +40,7 @@
 import org.bukkit.Location;
 import org.bukkit.Material;
 import org.bukkit.OfflinePlayer;
+import org.bukkit.Tag;
 import org.bukkit.block.Block;
 import org.bukkit.block.BlockState;
 import org.bukkit.block.Skull;
@@ -172,6 +173,18 @@ public ItemType(Material id) {
 		add_(new ItemData(id));
 	}
 
+	public ItemType(Material... ids) {
+		for (Material id : ids) {
+			add_(new ItemData(id));
+		}
+	}
+
+	public ItemType(Tag<Material> tag) {
+		for (Material id : tag.getValues()) {
+			add_(new ItemData(id));
+		}
+	}
+
 	public ItemType(Material id, String tags) {
 		add_(new ItemData(id, tags));
 	}

src/main/java/ch/njol/skript/bukkitutil/ItemUtils.java

@@ -21,7 +21,13 @@
 import ch.njol.skript.Skript;
 import ch.njol.skript.aliases.ItemType;
 import org.bukkit.Material;
+import org.bukkit.Tag;
 import org.bukkit.TreeType;
+import org.bukkit.block.Block;
+import org.bukkit.block.data.BlockData;
+import org.bukkit.block.data.type.Fence;
+import org.bukkit.block.data.type.Gate;
+import org.bukkit.block.data.type.Wall;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.Damageable;
 import org.bukkit.inventory.meta.ItemMeta;
@@ -219,5 +225,56 @@ public static boolean isAir(Material type) {
 	public static Material getTreeSapling(TreeType treeType) {
 		return TREE_TO_SAPLING_MAP.get(treeType);
 	}
-
+
+
+	private static final boolean HAS_FENCE_TAGS = !Skript.isRunningMinecraft(1, 14);
+
+	/**
+	 * Whether the block is a fence or a wall.
+	 * @param block the block to check.
+	 * @return whether the block is a fence/wall.
+	 */
+	public static boolean isFence(Block block) {
+		// TODO: 1.13 only, so remove in 2.10
+		if (!HAS_FENCE_TAGS) {
+			BlockData data = block.getBlockData();
+			return data instanceof Fence
+				|| data instanceof Wall
+				|| data instanceof Gate;
+		}
+
+		Material type = block.getType();
+		return Tag.FENCES.isTagged(type)
+			|| Tag.FENCE_GATES.isTagged(type)
+			|| Tag.WALLS.isTagged(type);
+	}
+
+	/**
+	 * @param material The material to check
+	 * @return whether the material is a full glass block
+	 */
+	public static boolean isGlass(Material material) {
+		switch (material) {
+			case GLASS:
+			case RED_STAINED_GLASS:
+			case ORANGE_STAINED_GLASS:
+			case YELLOW_STAINED_GLASS:
+			case LIGHT_BLUE_STAINED_GLASS:
+			case BLUE_STAINED_GLASS:
+			case CYAN_STAINED_GLASS:
+			case LIME_STAINED_GLASS:
+			case GREEN_STAINED_GLASS:
+			case MAGENTA_STAINED_GLASS:
+			case PURPLE_STAINED_GLASS:
+			case PINK_STAINED_GLASS:
+			case WHITE_STAINED_GLASS:
+			case LIGHT_GRAY_STAINED_GLASS:
+			case GRAY_STAINED_GLASS:
+			case BLACK_STAINED_GLASS:
+			case BROWN_STAINED_GLASS:
+				return true;
+			default:
+				return false;
+		}
+	}
 }

src/main/java/ch/njol/skript/bukkitutil/block/NewBlockCompat.java

@@ -22,6 +22,7 @@
 import ch.njol.skript.aliases.Aliases;
 import ch.njol.skript.aliases.ItemType;
 import ch.njol.skript.aliases.MatchQuality;
+import ch.njol.skript.bukkitutil.ItemUtils;
 import ch.njol.skript.variables.Variables;
 import ch.njol.yggdrasil.Fields;
 import org.bukkit.Bukkit;
@@ -31,10 +32,12 @@
 import org.bukkit.block.Block;
 import org.bukkit.block.BlockFace;
 import org.bukkit.block.BlockState;
+import org.bukkit.block.BlockSupport;
 import org.bukkit.block.data.Bisected;
 import org.bukkit.block.data.BlockData;
 import org.bukkit.block.data.Directional;
 import org.bukkit.block.data.type.Bed;
+import org.bukkit.block.data.type.Snow;
 import org.bukkit.entity.FallingBlock;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
@@ -141,15 +144,6 @@ public void deserialize(@NonNull Fields fields) throws StreamCorruptedException
 	}
 
 	private static class NewBlockSetter implements BlockSetter {
-
-		private ItemType floorTorch;
-		private ItemType wallTorch;
-
-		private ItemType specialTorchSides;
-		private ItemType specialTorchFloors;
-
-		private boolean typesLoaded = false;
-
 		private static final BlockFace[] CARDINAL_FACES =
 			new BlockFace[] {BlockFace.NORTH, BlockFace.EAST, BlockFace.SOUTH, BlockFace.WEST};
 
@@ -158,14 +152,11 @@ public NewBlockSetter() {}
 
 		@Override
 		public void setBlock(Block block, Material type, @Nullable BlockValues values, int flags) {
-			if (!typesLoaded)
-				loadTypes();
-
-			boolean rotate = (flags | ROTATE) != 0;
-			boolean rotateForce = (flags | ROTATE_FORCE) != 0;
-			boolean rotateFixType = (flags | ROTATE_FIX_TYPE) != 0;
-			boolean multipart = (flags | MULTIPART) != 0;
-			boolean applyPhysics = (flags | APPLY_PHYSICS) != 0;
+			boolean rotate = (flags & ROTATE) != 0;
+			boolean rotateForce = (flags & ROTATE_FORCE) != 0;
+			boolean rotateFixType = (flags & ROTATE_FIX_TYPE) != 0;
+			boolean multipart = (flags & MULTIPART) != 0;
+			boolean applyPhysics = (flags & APPLY_PHYSICS) != 0;
 			NewBlockValues ourValues = null;
 			if (values != null)
 				ourValues = (NewBlockValues) values;
@@ -178,39 +169,31 @@ public void setBlock(Block block, Material type, @Nullable BlockValues values, i
 			 */
 			boolean placed = false;
 			if (rotate) {
-				if (floorTorch.isOfType(type) || (rotateFixType && wallTorch.isOfType(type))) {
+				if (type == Material.TORCH || (rotateFixType && type == Material.WALL_TORCH)) {
 					// If floor torch cannot be placed, try a wall torch
 					Block under = block.getRelative(0, -1, 0);
-					boolean canPlace = true;
-					if (!under.getType().isOccluding()) { // Usually cannot be placed, but there are exceptions
-						// TODO check for stairs and slabs, currently complicated since there is no 'any' alias
-						if (specialTorchFloors.isOfType(under)) {
-							canPlace = true;
-						} else {
-							canPlace = false;
-						}
-					}
+					boolean canPlace = canSupportFloorTorch(under);
 
 					// Can't really place a floor torch, try wall one instead
 					if (!canPlace) {
 						BlockFace face = findWallTorchSide(block);
 						if (face != null) { // Found better torch spot
-							block.setType(wallTorch.getMaterial());
+							block.setType(Material.WALL_TORCH);
 							Directional data = (Directional) block.getBlockData();
 							data.setFacing(face);
 							block.setBlockData(data, applyPhysics);
 							placed = true;
 						}
 					}
-				} else if (wallTorch.isOfType(type)) {
+				} else if (type == Material.WALL_TORCH) {
 					Directional data;
 					if (ourValues != null)
 						data = (Directional) ourValues.data;
 					else
 						data = (Directional) Bukkit.createBlockData(type);
 
 					Block relative = block.getRelative(data.getFacing());
-					if ((!relative.getType().isOccluding() && !specialTorchSides.isOfType(relative)) || rotateForce) {
+					if ((!canSupportWallTorch(relative, data.getFacing().getOppositeFace())) || rotateForce) {
 						// Attempt to figure out a better rotation
 						BlockFace face = findWallTorchSide(block);
 						if (face != null) { // Found better torch spot
@@ -294,22 +277,49 @@ public void setBlock(Block block, Material type, @Nullable BlockValues values, i
 					block.setBlockData(ourValues.data, applyPhysics);
 			}
 		}
-
-		private void loadTypes() {
-			floorTorch = Aliases.javaItemType("floor torch");
-			wallTorch = Aliases.javaItemType("wall torch");
-
-			specialTorchSides = Aliases.javaItemType("special torch sides");
-			specialTorchFloors = Aliases.javaItemType("special torch floors");
-
-			typesLoaded = true;
+
+		// 1.19+
+		// TODO: remove in 2.10
+		private static final boolean HAS_BLOCK_SUPPORT = Skript.classExists("org.bukkit.block.BlockSupport");
+
+		/**
+		 * Returns whether this block can support a floor torch.
+		 * @param block The block the torch will be placed on
+		 * @return whether the block can support the torch.
+		 */
+		private static boolean canSupportFloorTorch(Block block) {
+			if (HAS_BLOCK_SUPPORT)
+				return block.getBlockData().isFaceSturdy(BlockFace.UP, BlockSupport.CENTER);
+
+			Material material = block.getType();
+			return (material.isOccluding()
+				|| canSupportWallTorch(block, null)
+				|| ItemUtils.isFence(block)
+				|| ItemUtils.isGlass(material)
+				|| material == Material.HOPPER
+				|| (material == Material.SNOW && (((Snow) block.getBlockData()).getLayers() == 8))
+			);
+		}
+
+		/**
+		 * Returns whether this block can support a wall torch. In 1.19+, a face can be specified.
+		 * @param block The block the torch will be placed on
+		 * @param face The face the torch will be placed on (only considered in 1.19+)
+		 * @return whether the block face can support the torch.
+		 */
+		private static boolean canSupportWallTorch(Block block, @Nullable BlockFace face) {
+			if (HAS_BLOCK_SUPPORT && face != null)
+				return block.getBlockData().isFaceSturdy(face, BlockSupport.FULL);
+
+			Material material = block.getType();
+			return material.isOccluding() || material == Material.SOUL_SAND || material == Material.SPAWNER;
 		}
 
 		@Nullable
 		private BlockFace findWallTorchSide(Block block) {
 			for (BlockFace face : CARDINAL_FACES) {
 				Block relative = block.getRelative(face);
-				if (relative.getType().isOccluding() || specialTorchSides.isOfType(relative))
+				if (relative.getType().isOccluding() || canSupportWallTorch(relative, face.getOppositeFace()))
 					return face.getOppositeFace(); // Torch can be rotated towards from this face
 			}
 

src/main/java/ch/njol/skript/classes/data/BukkitEventValues.java

@@ -390,12 +390,11 @@ public Block get(final BlockBreakEvent e) {
 				return new DelayedChangeBlock(e.getBlock());
 			}
 		}, 0);
-		ItemType stationaryWater = Aliases.javaItemType("stationary water");
 		EventValues.registerEventValue(BlockBreakEvent.class, Block.class, new Getter<Block, BlockBreakEvent>() {
 			@Override
 			public Block get(final BlockBreakEvent e) {
 				final BlockState s = e.getBlock().getState();
-				s.setType(s.getType() == Material.ICE ? stationaryWater.getMaterial() : Material.AIR);
+				s.setType(s.getType() == Material.ICE ? Material.WATER : Material.AIR);
 				s.setRawData((byte) 0);
 				return new BlockStateBlock(s, true);
 			}
@@ -758,12 +757,11 @@ public Block get(final PlayerBucketEmptyEvent e) {
 				return e.getBlockClicked().getRelative(e.getBlockFace());
 			}
 		}, -1);
-		ItemType stationaryLava = Aliases.javaItemType("stationary lava");
 		EventValues.registerEventValue(PlayerBucketEmptyEvent.class, Block.class, new Getter<Block, PlayerBucketEmptyEvent>() {
 			@Override
 			public Block get(final PlayerBucketEmptyEvent e) {
 				final BlockState s = e.getBlockClicked().getRelative(e.getBlockFace()).getState();
-				s.setType(e.getBucket() == Material.WATER_BUCKET ? stationaryWater.getMaterial() : stationaryLava.getMaterial());
+				s.setType(e.getBucket() == Material.WATER_BUCKET ? Material.WATER : Material.LAVA);
 				s.setRawData((byte) 0);
 				return new BlockStateBlock(s, true);
 			}

src/main/java/ch/njol/skript/classes/data/DefaultComparators.java

@@ -495,15 +495,14 @@ public boolean supportsOrdering() {
 		});
 
 		// DamageCause - ItemType
-		ItemType lava = Aliases.javaItemType("lava");
 		Comparators.registerComparator(DamageCause.class, ItemType.class, new Comparator<DamageCause, ItemType>() {
 			@Override
 			public Relation compare(DamageCause dc, ItemType t) {
 				switch (dc) {
 					case FIRE:
 						return Relation.get(t.isOfType(Material.FIRE));
 					case LAVA:
-						return Relation.get(t.equals(lava));
+						return Relation.get(t.getMaterial() == Material.LAVA);
 					case MAGIC:
 						return Relation.get(t.isOfType(Material.POTION));
 					case HOT_FLOOR: