New Expression: Attached Block of Arrow (SkriptLang#5589)

src/main/java/ch/njol/skript/expressions/ExprAttachedBlock.java

@@ -0,0 +1,68 @@
+/**
+ *   This file is part of Skript.
+ *
+ *  Skript is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Skript 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Skript.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright Peter Güttinger, SkriptLang team and contributors
+ */
+package ch.njol.skript.expressions;
+
+import ch.njol.skript.Skript;
+import ch.njol.skript.doc.Description;
+import ch.njol.skript.doc.Examples;
+import ch.njol.skript.doc.Name;
+import ch.njol.skript.doc.Since;
+import ch.njol.skript.expressions.base.SimplePropertyExpression;
+import org.bukkit.block.Block;
+import org.bukkit.entity.AbstractArrow;
+import org.bukkit.entity.Arrow;
+import org.bukkit.entity.Projectile;
+import org.jetbrains.annotations.Nullable;
+
+@Name("Arrow Attached Block")
+@Description("Returns the attached block of an arrow.")
+@Examples("set hit block of last shot arrow to diamond block")
+@Since("INSERT VERSION")
+public class ExprAttachedBlock extends SimplePropertyExpression<Projectile, Block> {
+
+	private static final boolean HAS_ABSTRACT_ARROW = Skript.classExists("org.bukkit.entity.AbstractArrow");
+
+	static {
+		register(ExprAttachedBlock.class, Block.class, "(attached|hit) block", "projectiles");
+	}
+
+	@Override
+	@Nullable
+	public Block convert(Projectile projectile) {
+		if (HAS_ABSTRACT_ARROW) {
+			if (projectile instanceof AbstractArrow) {
+				return ((AbstractArrow) projectile).getAttachedBlock();
+			}
+		} else if (projectile instanceof Arrow) {
+			return ((Arrow) projectile).getAttachedBlock();
+		}
+		return null;
+	}
+
+	@Override
+	public Class<? extends Block> getReturnType() {
+		return Block.class;
+	}
+
+	@Override
+	public String getPropertyName() {
+		return "attached block";
+	}
+
+}