Initial Commit.

.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" output="target/classes" path="src">
+		<attributes>
+			<attribute name="optional" value="true"/>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8">
+		<attributes>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
+		<attributes>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry excluding="**" kind="src" output="target/classes" path="resources">
+		<attributes>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="output" path="target/classes"/>
+</classpath>

.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>PermTrigger</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.m2e.core.maven2Builder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+		<nature>org.eclipse.m2e.core.maven2Nature</nature>
+	</natures>
+</projectDescription>

pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<groupId>com.palmergames.spigot.permtrigger</groupId>
+	<artifactId>PermTrigger</artifactId>
+	<version>1.0.0</version>
+	<description>Trigger commands based upon permission states</description>
+
+	<properties>
+		<maven.compiler.source>1.8</maven.compiler.source>
+		<maven.compiler.target>1.8</maven.compiler.target>
+		<project.bukkitAPIVersion>1.14</project.bukkitAPIVersion>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<jar.finalName>${project.name}</jar.finalName>
+	</properties>
+
+	<repositories>
+		<repository>
+			<id>spigot-repo</id>
+			<url>https://hub.spigotmc.org/nexus/content/repositories/snapshots/</url>
+		</repository>
+		<repository>
+			<id>CodeMC</id>
+			<url>https://repo.codemc.org/repository/maven-public</url>
+		</repository>
+		<repository>
+			<id>apache</id>
+			<url>https://maven.apache.org/</url>
+		</repository>
+		<repository>
+			<id>jitpack.io</id>
+			<url>https://jitpack.io</url>
+		</repository>
+	</repositories>
+
+	<dependencies>
+		<!--Bukkit/Spigot API -->
+		<dependency>
+			<groupId>org.spigotmc</groupId>
+			<artifactId>spigot-api</artifactId>
+			<version>1.16.2-R0.1-SNAPSHOT</version>
+			<scope>provided</scope>
+		</dependency>
+		<!--GroupManager API -->
+		<dependency>
+			<groupId>com.github.ElgarL</groupId>
+			<artifactId>groupmanager</artifactId>
+			<version>2.5</version>
+		</dependency>
+		<!--LuckPerms API -->
+		<dependency>
+			<groupId>net.luckperms</groupId>
+			<artifactId>api</artifactId>
+			<version>5.1</version>
+			<scope>provided</scope>
+		</dependency>
+		<!-- bStats -->
+		<dependency>
+			<groupId>org.bstats</groupId>
+			<artifactId>bstats-bukkit</artifactId>
+			<version>1.7</version>
+			<scope>compile</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<defaultGoal>clean package</defaultGoal>
+		<sourceDirectory>src</sourceDirectory>
+		<resources>
+			<!-- Include all resources -->
+			<resource>
+				<directory>resources</directory>
+				<filtering>true</filtering>
+				<includes>
+					<include>*.yml</include>
+					<include>*.txt</include>
+					<include>*.json</include>
+					<include>*.properties</include>
+				</includes>
+			</resource>
+		</resources>
+	</build>
+
+</project>

resources/config.yml

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+data:
+    # Acceptable entries are (HTTP or JSON)
+    type: JSON
+    URL: http://example.site/perm_triggers.json
+
+    # If refresh is enabled the plugin will attempt to reload
+    # the triggers at an interval of minutes as specified below.
+    refresh:
+        enabled: true
+        interval: 60

resources/perm_triggers.json

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+# This file contains permission triggers.
+# 
+# Triggers are sets of commands to be issue at the console
+# when a permission is added to, or removed from a player.
+# 
+# Commands can have prefixes to perform specific tasks.
+# '#broadcast' '#tell'
+{
+  "player.creative": {
+    "added": [
+      "gamemode creative {player}",
+      "#broadcast {player} has become enlightened!"
+    ],
+    "removed": [
+      "gamemode survival {player}",
+      "#broadcast {player} has equipped leaded boots."
+    ]
+  },
+  "player.speed": {
+    "added": [
+      "effect give {player} speed 1700 5 true",
+	  "effect give {player} haste 1700 3 true",
+      "#tell You have become fast!"
+    ],
+    "removed": [
+      "effect clear {player} speed",
+	  "effect clear {player} haste",
+      "#tell Slow down speedy!"
+    ]
+  },
+  "player.op": {
+    "added": [
+      "op {player}"
+    ],
+    "removed": [
+      "deop {player}"
+    ]
+  }
+}

resources/plugin.yml

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+name: PermTrigger
+main: com.palmergames.spigot.permtrigger.PermTrigger
+version: ${project.version}
+api-version: ${project.bukkitAPIVersion}
+
+author: ElgarL
+website: http://palmergames.com
+
+description: >
+    Trigger commands based upon permission states
+
+softdepend: [GroupManager,LuckPerms]
+
+############################################################
+# +------------------------------------------------------+ #
+# |                       Commands                       | #
+# +------------------------------------------------------+ #
+############################################################
+
+commands:
+    ptreload:
+        permission: pt.command.reload
+        default: op

src/com/palmergames/spigot/permtrigger/DataCache.java

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+/*
+ *  PermTrigger - A plug-in for Spigot/Bukkit based Minecraft servers.
+ *  Copyright (C) 2020  ElgarL
+ *
+ *  This program 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.
+ *
+ *  This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.palmergames.spigot.permtrigger;
+
+import java.util.Set;
+import java.util.UUID;
+
+import org.bukkit.NamespacedKey;
+import org.bukkit.entity.Player;
+import org.bukkit.persistence.PersistentDataContainer;
+import org.bukkit.persistence.PersistentDataType;
+
+/**
+ * @author ElgarL
+ *
+ */
+public class DataCache {
+
+	private NamespacedKey key;
+	private PermTrigger plugin;
+	private Player player;
+
+	/**
+	 * 
+	 */
+	public DataCache(PermTrigger plugin) {
+
+		this.plugin = plugin;
+	}
+
+	/**
+	 * Set the state of a Trigger. Or delete if false.
+	 * 
+	 * @param uid	UUID of the Player
+	 * @param triggerPerm	String permission to trigger on.
+	 * @param state	true or false.
+	 */
+	public void setTriggerState(UUID uid, String triggerPerm, boolean state) {
+
+		player = plugin.getServer().getPlayer(uid);
+		key = new NamespacedKey(plugin, triggerPerm);
+
+		if (player == null)
+			return;
+
+		if (state == true)
+			player.getPersistentDataContainer().set(key, PersistentDataType.BYTE, (byte) 1);
+		else
+			player.getPersistentDataContainer().remove(key);
+	}
+
+	/**
+	 * Is this trigger currently set on the Player.
+	 * 
+	 * @param uid	UUID of the Player
+	 * @param triggerPerm	String permission to trigger on.
+	 * @return	true if set.
+	 */
+	public boolean hasTrigger(UUID uid, String triggerPerm) {
+
+		player = plugin.getServer().getPlayer(uid);
+		key = new NamespacedKey(plugin, triggerPerm);
+
+		if (player == null)
+			return false;
+
+		Byte node = player.getPersistentDataContainer().get(key, PersistentDataType.BYTE);
+
+		if (node != null)
+			return node.byteValue() == 1;
+
+		return false;
+	}
+
+	/**
+	 * Called when a player disconnects to purge any old/unknown triggers.
+	 * 
+	 * @param uid	UUID of the Player
+	 */
+	public void purgeOldTriggers(UUID uid) {
+
+		player = plugin.getServer().getPlayer(uid);
+
+		if (player == null)
+			return;
+
+		Set<String> triggers = plugin.getDatabase().getTriggerKeys();
+
+		PersistentDataContainer container = player.getPersistentDataContainer();
+
+		for (NamespacedKey keys : container.getKeys()) {
+			if (!triggers.contains(keys.getKey())) {
+				plugin.getLogger().warning(String.format("Unknown trigger removed! %s.", keys.getKey()));
+				container.remove(keys);
+			}
+		}
+
+
+	}
+}