Adds some more taming syntax (SkriptLang#6850)

* Adds tame syntax

* Adds test

* Adds Skript doc annotations

* NotSoDelayed Suggestions

Co-authored-by: NotSoDelayed <72163224+NotSoDelayed@users.noreply.github.com>

* Suggestions
- Removed 'de' as an option to untame a tameable entity
- Adds untaming to test
- Deletes value within variables instead of killing

* Fixes test

* Changed tests slightly

* Auggestion

Co-authored-by: NotSoDelayed <72163224+NotSoDelayed@users.noreply.github.com>

* Suggestions

* Changes to JetBrains nullable annotation

---------

Co-authored-by: NotSoDelayed <72163224+NotSoDelayed@users.noreply.github.com>
Co-authored-by: sovdee <10354869+sovdeeth@users.noreply.github.com>

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

@@ -0,0 +1,34 @@
+package ch.njol.skript.conditions;
+
+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.Since;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.Tameable;
+
+@Name("Is Tamed")
+@Description("Check if a tameable entity is tamed (horse, parrot, cat, etc.).")
+@Examples({
+    "send true if {_horse} is tamed",
+    "tame {_horse} if {_horse} is untamed"
+})
+@Since("INSERT VERSION")
+public class CondIsTamed extends PropertyCondition<Entity> {
+
+	static {
+		register(CondIsTamed.class, "(tamed|domesticated)", "entities");
+	}
+
+	@Override
+	public boolean check(Entity entity) {
+		return (entity instanceof Tameable) && ((Tameable) entity).isTamed();
+	}
+
+	@Override
+	protected String getPropertyName() {
+		return "tamed";
+	}
+
+}

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

@@ -0,0 +1,54 @@
+package ch.njol.skript.effects;
+
+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.lang.Effect;
+import ch.njol.skript.lang.Expression;
+import ch.njol.skript.lang.SkriptParser.ParseResult;
+import ch.njol.util.Kleenean;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.Tameable;
+import org.bukkit.event.Event;
+import org.jetbrains.annotations.Nullable;
+
+@Name("Tame / Untame")
+@Description("Tame a tameable entity (horse, parrot, cat, etc.).")
+@Examples({
+    "tame {_horse}",
+    "untame {_horse}"
+})
+@Since("INSERT VERSION")
+public class EffTame extends Effect {
+
+	static {
+		Skript.registerEffect(EffTame.class, "[:un](tame|domesticate) %entities%");
+	}
+
+	private boolean tame;
+	private Expression<Entity> entities;
+
+	@Override
+	@SuppressWarnings("unchecked")
+	public boolean init(Expression<?>[] exprs, int matchedPattern, Kleenean isDelayed, ParseResult parseResult) {
+		tame = !parseResult.hasTag("un");
+		entities = (Expression<Entity>) exprs[0];
+		return true;
+	}
+
+	@Override
+	protected void execute(Event event) {
+		for (Entity entity : entities.getArray(event)) {
+			if (entity instanceof Tameable)
+				((Tameable) entity).setTamed(tame);
+		}
+	}
+
+	@Override
+	public String toString(@Nullable Event event, boolean debug) {
+		return (tame ? "tame " : "untame ") + entities.toString(event, debug);
+	}
+
+}

src/test/skript/tests/syntaxes/conditions/CondIsTamed.sk

@@ -0,0 +1,21 @@
+test "is tamed":
+	spawn a horse at (spawn of world "world"):
+		set {_e} to entity
+	spawn an adult zombie at (spawn of world "world"):
+		set {_z} to entity
+
+	assert {_e} is not tamed with "a normally spawned horse should not be tamed"
+
+	tame {_e}
+	assert {_e} is tamed with "taming a horse should do exactly that"
+
+	untame {_e}
+	assert {_e} is not tamed with "untaming a horse should do exactly that"
+
+	tame {_}
+	tame {_z}
+	assert {_} is not tamed with "taming null should do nothing"
+	assert {_z} is not tamed with "taming an invalid entity should do nothing"
+
+	delete entity within {_e}
+	delete entity within {_z}