CondIsPluginEnabled - new condition checking if plugins are enabled/disabled (#3973)

Author: ShaneBeee

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

@@ -0,0 +1,90 @@
+/**
+ *   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.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.SkriptParser.ParseResult;
+import ch.njol.util.Kleenean;
+import org.bukkit.Bukkit;
+import org.bukkit.event.Event;
+import org.bukkit.plugin.Plugin;
+import org.eclipse.jdt.annotation.Nullable;
+
+@Name("Is Plugin Enabled")
+@Description({"Check if a plugin is enabled/disabled on the server.",
+	"Plugin names can be found in the plugin's 'plugin.yml' file or by using the '/plugins' command, they are NOT the name of the plugin's jar file.",
+	"When checking if a plugin is not enabled, this will return true if the plugin is either disabled or not on the server. ",
+	"When checking if a plugin is disabled, this will return true if the plugin is on the server and is disabled."})
+@Examples({"if plugin \"Vault\" is enabled:",
+	"if plugin \"WorldGuard\" is not enabled:",
+	"if plugins \"Essentials\" and \"Vault\" are enabled:",
+	"if plugin \"MyBrokenPlugin\" is disabled:"})
+@Since("INSERT VERSION")
+public class CondIsPluginEnabled extends Condition {
+
+	static {
+		Skript.registerCondition(CondIsPluginEnabled.class,
+			"plugin[s] %strings% (is|are) enabled",
+			"plugin[s] %strings% (is|are)(n't| not) enabled",
+			"plugin[s] %strings% (is|are) disabled");
+	}
+
+	@SuppressWarnings("null")
+	private Expression<String> plugins;
+	private int pattern;
+
+	@SuppressWarnings({"unchecked", "null"})
+	@Override
+	public boolean init(final Expression<?>[] exprs, final int matchedPattern, final Kleenean isDelayed, final ParseResult parseResult) {
+		plugins = (Expression<String>) exprs[0];
+		pattern = matchedPattern;
+		return true;
+	}
+
+	@Override
+	public boolean check(Event e) {
+		return plugins.check(e, plugin -> {
+			Plugin p = Bukkit.getPluginManager().getPlugin(plugin);
+			switch (pattern) {
+				case 1:
+					return p == null || !p.isEnabled();
+				case 2:
+					return p != null && !p.isEnabled();
+				default:
+					return p != null && p.isEnabled();
+			}
+		});
+	}
+
+	@Override
+	public String toString(@Nullable Event e, boolean debug) {
+		String plugin = plugins.isSingle() ? "plugin " : "plugins ";
+		String plural = plugins.isSingle() ? " is" : " are";
+		String pattern = this.pattern == 0 ? " enabled" : this.pattern == 1 ? " not enabled" : " disabled";
+		return plugin + plugins.toString(e, debug) + plural + pattern;
+	}
+
+}