Add fire ticks expression (#5059)

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

@@ -0,0 +1,87 @@
+/**
+ *   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.classes.Changer.ChangeMode;
+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 ch.njol.skript.util.Timespan;
+import ch.njol.util.coll.CollectionUtils;
+import org.bukkit.entity.Entity;
+import org.bukkit.event.Event;
+import org.eclipse.jdt.annotation.Nullable;
+
+@Name("Entity Fire Burn Duration")
+@Description("How much time an entity will be burning for.")
+@Examples({"send \"You will stop burning in %fire time of player%\""})
+@Since("INSERT VERSION")
+public class ExprFireTicks extends SimplePropertyExpression<Entity, Timespan> {
+
+	static {
+		register(ExprFireTicks.class, Timespan.class, "(burn[ing]|fire) (time|duration)", "entities");
+	}
+
+	@Override
+	@Nullable
+	public Timespan convert(Entity entity) {
+		return Timespan.fromTicks_i(Math.max(entity.getFireTicks(), 0));
+	}
+
+	@Override
+	@Nullable
+	public Class<?>[] acceptChange(ChangeMode mode) {
+		return (mode != ChangeMode.REMOVE_ALL) ? CollectionUtils.array(Timespan.class) :  null;
+	}
+
+	@Override
+	public void change(Event event, @Nullable Object[] delta, ChangeMode mode) {
+		Entity[] entities = getExpr().getArray(event);
+		int change = delta == null ? 0 : (int) ((Timespan) delta[0]).getTicks_i();
+		switch (mode) {
+			case REMOVE:
+				change = -change;
+			case ADD:
+				for (Entity entity : entities)
+					entity.setFireTicks(entity.getFireTicks() + change);
+				break;
+			case DELETE:
+			case RESET:
+			case SET:
+				for (Entity entity : entities)
+					entity.setFireTicks(change);
+				break;
+			default:
+				assert false;
+		}
+	}
+
+	@Override
+	public Class<? extends Timespan> getReturnType() {
+		return Timespan.class;
+	}
+
+	@Override
+	protected String getPropertyName() {
+		return "fire time";
+	}
+
+}