Enhance Shearing Related Elements

src/main/java/ch/njol/skript/conditions/CondIsSheared.java

@@ -0,0 +1,71 @@
+/**
+ *   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.conditions;
+
+import ch.njol.skript.Skript;
+import ch.njol.skript.conditions.base.PropertyCondition;
+import ch.njol.skript.doc.Description;
+import ch.njol.skript.doc.Examples;
+import ch.njol.skript.doc.Name;
+import ch.njol.skript.doc.RequiredPlugins;
+import ch.njol.skript.doc.Since;
+import io.papermc.paper.entity.Shearable;
+import org.bukkit.entity.Cow;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.entity.Sheep;
+import org.bukkit.entity.Snowman;
+
+@Name("Entity Is Sheared")
+@Description("Checks whether entities are sheared. This condition only works on sheep and snowmen for versions below 1.19.4.")
+@Examples({
+	"if targeted entity of player is sheared:",
+		"\tsend \"This entity has nothing left to shear!\" to player"
+})
+@Since("INSERT VERSION")
+@RequiredPlugins("MC 1.13+ (sheep & snowmen), Paper 1.19.4+ (all shearable entities)")
+public class CondIsSheared extends PropertyCondition<LivingEntity> {
+
+	private static final boolean interfaceMethod = Skript.classExists("io.papermc.paper.entity.Shearable");
+
+	static {
+		register(CondIsSheared.class, "(sheared|shorn)", "livingentities");
+	}
+
+	@Override
+	public boolean check(LivingEntity entity) {
+		if (entity instanceof Cow) // As sheared mushroom cow is a Cow which does not implement Shearable
+			return true;
+		if (interfaceMethod) {
+			if (!(entity instanceof Shearable))
+				return false;
+			return !((Shearable) entity).readyToBeSheared();
+		}
+		if (entity instanceof Sheep)
+			return ((Sheep) entity).isSheared();
+		if (entity instanceof Snowman)
+			return ((Snowman) entity).isDerp();
+		return false;
+	}
+
+	@Override
+	protected String getPropertyName() {
+		return "sheared";
+	}
+
+}

src/main/java/ch/njol/skript/effects/EffShear.java

@@ -18,60 +18,87 @@
  */
 package ch.njol.skript.effects;
 
-import org.bukkit.entity.LivingEntity;
-import org.bukkit.entity.Sheep;
-import org.bukkit.event.Event;
-import org.eclipse.jdt.annotation.Nullable;
-
 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.RequiredPlugins;
 import ch.njol.skript.doc.Since;
 import ch.njol.skript.lang.Effect;
 import ch.njol.skript.lang.Expression;
 import ch.njol.skript.lang.SkriptParser.ParseResult;
 import ch.njol.util.Kleenean;
 
-/**
- * @author Peter Güttinger
- */
+import io.papermc.paper.entity.Shearable;
+
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.entity.Sheep;
+import org.bukkit.entity.Snowman;
+import org.bukkit.event.Event;
+import org.jetbrains.annotations.Nullable;
+
 @Name("Shear")
-@Description("Shears or 'un-shears' a sheep. Please note that no wool is dropped, this only sets the 'sheared' state of the sheep.")
-@Examples({"on rightclick on a sheep holding a sword:",
-		"	shear the clicked sheep"})
-@Since("2.0")
+@Description({
+	"Shears or un-shears a shearable entity with drops by shearing and a 'sheared' sound. Using with 'force' will force this effect despite the entity's 'shear state'.",
+	"\nPlease note that..:",
+	"\n- If your server is not running with Paper 1.19.4 or higher, this effect will only change its 'shear state', and the 'force' effect is unavailable",
+	"\n- Force-shearing or un-shearing on a sheared mushroom cow is not possible"
+})
+@Examples({
+	"on rightclick on a sheep holding a sword:",
+		"\tshear the clicked sheep",
+		"\tchance of 10%",
+		"\tforce shear the clicked sheep"
+})
+@Since("2.0 (sheep & snowmen), INSERT VERSION (all shearable entities)")
+@RequiredPlugins("Paper 1.19.4+ (all shearable entities)")
 public class EffShear extends Effect {
+
+	private static final boolean INTERFACE_METHOD = Skript.classExists("io.papermc.paper.entity.Shearable");
+
 	static {
 		Skript.registerEffect(EffShear.class,
-				"shear %livingentities%",
+				(INTERFACE_METHOD ? "[:force] " : "") + "shear %livingentities%",
 				"un[-]shear %livingentities%");
 	}
 
 	@SuppressWarnings("null")
-	private Expression<LivingEntity> sheep;
+	private Expression<LivingEntity> entity;
+	private boolean force;
 	private boolean shear;
-
-	@SuppressWarnings({"unchecked", "null"})
+
 	@Override
-	public boolean init(final Expression<?>[] exprs, final int matchedPattern, final Kleenean isDelayed, final ParseResult parseResult) {
-		sheep = (Expression<LivingEntity>) exprs[0];
+	@SuppressWarnings("unchecked")
+	public boolean init(Expression<?>[] exprs, int matchedPattern, Kleenean isDelayed, ParseResult parseResult) {
+		entity = (Expression<LivingEntity>) exprs[0];
+		force = parseResult.hasTag("force");
 		shear = matchedPattern == 0;
 		return true;
 	}
 
 	@Override
-	protected void execute(final Event e) {
-		for (final LivingEntity en : sheep.getArray(e)) {
-			if (en instanceof Sheep) {
-				((Sheep) en).setSheared(shear);
+	protected void execute(Event event) {
+		for (LivingEntity entity : entity.getArray(event)) {
+			if (shear && INTERFACE_METHOD) {
+				if (!(entity instanceof Shearable))
+					continue;
+				Shearable shearable = ((Shearable) entity);
+				if (!force && !shearable.readyToBeSheared())
+					continue;
+				shearable.shear();
+				continue;
+			}
+			if (entity instanceof Sheep) {
+				((Sheep) entity).setSheared(shear);
+			} else if (entity instanceof Snowman) {
+				((Snowman) entity).setDerp(shear);
 			}
 		}
 	}
 
 	@Override
-	public String toString(final @Nullable Event e, final boolean debug) {
-		return (shear ? "" : "un") + "shear " + sheep.toString(e, debug);
+	public String toString(@Nullable Event event, boolean debug) {
+		return (shear ? "" : "un") + "shear " + entity.toString(event, debug);
 	}
 
 }