Whether expression for getting the result of conditions.

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

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+/**
+ *   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.lang.Condition;
+import ch.njol.skript.lang.Expression;
+import ch.njol.skript.lang.ExpressionType;
+import ch.njol.skript.lang.SkriptParser.ParseResult;
+import ch.njol.skript.lang.util.SimpleExpression;
+import ch.njol.util.Kleenean;
+import ch.njol.util.coll.CollectionUtils;
+import org.bukkit.event.Event;
+import org.jetbrains.annotations.UnknownNullability;
+
+@Name("Whether")
+@Description("A shorthand for returning the result of a condition (true or false).")
+@Examples({
+	"set {fly} to whether player can fly",
+	"broadcast \"Flying: %whether player is flying%\""
+})
+@Since("INSERT VERSION")
+public class ExprWhether extends SimpleExpression<Boolean> {
+
+	static {
+		Skript.registerExpression(ExprWhether.class, Boolean.class, ExpressionType.SIMPLE,
+				"whether <.+>");
+	}
+
+	private @UnknownNullability Condition condition;
+
+	@Override
+	public boolean init(Expression<?>[] expressions, int pattern, Kleenean delayed, ParseResult result) {
+		String input = result.regexes.get(0).group();
+		this.condition = Condition.parse(input, "Can't understand this condition: " + input);
+		return condition != null;
+	}
+
+	@Override
+	protected Boolean[] get(Event e) {
+		return CollectionUtils.array(condition.check(e));
+	}
+
+	@Override
+	public Class<? extends Boolean> getReturnType() {
+		return Boolean.class;
+	}
+
+	@Override
+	public boolean isSingle() {
+		return true;
+	}
+
+	@Override
+	public String toString(Event event, boolean debug) {
+		return "whether " + condition;
+	}
+
+}

src/test/skript/tests/syntaxes/expressions/ExprWhether.sk

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+test "whether":
+	set {_number} to 5
+	set {_okay} to whether {_number} is greater than 3
+	assert {_okay} is true with "Condition didn't evaluate correctly"
+	set {_okay} to whether {_number} is less than 6
+	assert {_okay} is true with "Condition didn't evaluate correctly"
+	set {_okay} to whether {_number} is 5
+	assert {_okay} is true with "Condition didn't evaluate correctly"
+	delete {_okay}
+	spawn a pig at spawn of "world":
+		set {_pig} to event-entity
+	assert (whether {_pig} is alive) is true with "Condition didn't evaluate correctly"
+	assert (whether health of {_pig} is greater than 0) is true with "Condition didn't evaluate correctly"
+	delete the last spawned pig