Merge branch 'feature/plugins' into develop

.classpath

@@ -13,5 +13,6 @@
 	<classpathentry kind="lib" path="lib/slf4j-jdk14-1.7.25.jar"/>
 	<classpathentry kind="lib" path="lib/twitter4j-core-4.0.7-javadoc.jar"/>
 	<classpathentry kind="lib" path="lib/twitter4j-core-4.0.7.jar"/>
+	<classpathentry kind="lib" path="lib/luaj-jse-3.0.1.jar"/>
 	<classpathentry kind="output" path="bin"/>
 </classpath>

locStrings.config

@@ -16,7 +16,7 @@ RollInfo=Based on input of xdy where x is number of dice and y is faces kitty wi
 [CommandGuildRoleAllowed]
 GuildRoleAllowedInfo=
 GuildRoleAllowedSuccess=Added %s to the allowed roles! 
-GuildRoleAllowedDuplicate=Can't add the same role twice! 
+GuildRoleAllowedDuplicate=Can't add the same role twice! 
 
 [CommandStats]
 StatsInfo=Displays the actively running KittyBot application information
@@ -26,7 +26,7 @@ TweetInfo=Kitty will tweet to her personal twitter account
 TweetError=Tweet command failed!
 
 [CommandGuildRoleAdd]
-GuildRoleAddSuccess=Added %s to %s
+GuildRoleAddSuccess=Added %s to %s
 GuildRoleAddFailure=Failed to add %s to %s
 GuildRoleAddNotAllowed=You are not allowed to add %s!
 GuildRoleAddInfo=Add a role to yourself! 
@@ -133,14 +133,14 @@ BoopStandard=Woah! %s booped me! That's %s total!
 BoopMultiple=%s booped several others - %s!
 
 [CommandFetch]
-FetchError=That no picture! 
-FetchEat=Me eat now *monch %s*
+FetchError=That no picture! 
+FetchEat=Me eat now *monch %s*
 FetchInfo=Throw a custom emote and me bring it back! 
-FetchCatchRun=*Catches and runs away with %s*
-FetchRunAway=*Runs away and doesn't return for a long time* 
-FetchBringBack=Me gots it! %s
-FetchBringBackWrong=Me gots it! %s
-FetchStare=*Stares at %s*
+FetchCatchRun=*Catches and runs away with %s*
+FetchRunAway=*Runs away and doesn't return for a long time* 
+FetchBringBack=Me gots it! %s
+FetchBringBackWrong=Me gots it! %s
+FetchStare=*Stares at %s*
 
 [CommandInfo]
 InfoResponse=I'm made by `Rin#8904` and `Reverie Wisp#3703`!\nYou can find more info about me along with a Patreon link to support us and GitHub link for filing bugs https://www.rinsnowmew.com/bot/
@@ -183,10 +183,10 @@ EightBallYes10=Signs point to yes.
 InviteInfo=Provides a direct invite link for KittyBot
 
 [CommandGuildRoleRemove]
-GuildRoleRemoveNotAllowed=You're not allowed to add %s
-GuildRoleRemoveFailure=Couldn't remove %s from %s 
-GuildRoleRemoveSuccess=Removed %s from %s!
-GuildRoleRemoveInfo=
+GuildRoleRemoveNotAllowed=You're not allowed to add %s
+GuildRoleRemoveFailure=Couldn't remove %s from %s 
+GuildRoleRemoveSuccess=Removed %s from %s!
+GuildRoleRemoveInfo=
 
 [CommandWolfram]
 WolframError=Something went wrong!

plugins/example.lua

@@ -0,0 +1,6 @@
+-- Example plugin stub. This function is called and passed the input message.
+-- If nil is returned, the plugin is considered to have not run, but if any 
+-- other value is returned, it's interpreted as a string and sent back to the user.
+function plugin(message)
+	return nil;
+end

src/core/ObjectBuilderFactory.java

@@ -6,6 +6,7 @@ import java.util.List;
 import java.util.concurrent.Semaphore;
 
 import commands.*;
+import core.lua.PluginManager;
 import dataStructures.*;
 import net.dv8tion.jda.core.entities.Emote;
 import net.dv8tion.jda.core.entities.Member;
@@ -38,6 +39,9 @@ public class ObjectBuilderFactory
 	// RPManger for tracking RP system
 	private static RPManager rpManager; 
 	
+	// Plugin manager
+	private static PluginManager pluginManager;
+	
 	// Localization classes - these are singletons, but should be initialized before almost all other 
 	// things so their inclusion in the factory is to ensure they're started at the correct time.
 	@SuppressWarnings("unused") private static LocStrings locStrings;
@@ -408,6 +412,16 @@ public class ObjectBuilderFactory
 		return rpManager;
 	}
 	
+	public static PluginManager ConstructPluginManager()
+	{
+		LazyInit();
+		
+		if(pluginManager == null)
+			pluginManager = new PluginManager("./plugins/");
+		
+		return pluginManager;
+	}
+	
 	public static Integer GetGuildCount()
 	{ 	synchronized(guildCache)
 		{

src/core/lua/Plugin.java

@@ -0,0 +1,34 @@
+package core.lua;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.stream.Stream;
+
+//To promote flexibility, plugins are lua file with predefined callbacks.
+//They are executed between the initial built-in preprocessing and the command parsing.
+public class Plugin
+{
+	public Path filepath;
+	public String contents;
+	
+	public Plugin(Path filepath)
+	{
+		this.filepath = filepath;
+		
+		StringBuilder contentBuilder = new StringBuilder();
+		
+		try 
+		{
+			Stream<String> stream = Files.lines(filepath, StandardCharsets.UTF_8);
+			stream.forEach(str -> contentBuilder.append(str).append("\n"));
+			stream.close();
+			contents = contentBuilder.toString();
+		}
+		catch (IOException e)
+		{
+			PluginLog.Error(e.getMessage());
+		}
+	}
+}

src/core/lua/PluginLoader.java

@@ -0,0 +1,42 @@
+package core.lua;
+
+import org.luaj.vm2.Globals;
+import org.luaj.vm2.LuaValue;
+import org.luaj.vm2.lib.jse.JsePlatform;
+
+// This class wraps the lua layer - provides all the processing and function
+// calls to the lua binding.
+public class PluginLoader
+{
+	private Globals globals;
+	
+	public PluginLoader()
+	{
+		globals = JsePlatform.standardGlobals();
+		PluginLog.Log("Created new PluginLoader lua environment");
+	}
+	
+	public String Process(Plugin toProcess, String args)
+	{
+		globals.load(toProcess.contents).call();
+		LuaValue pluginFunc = globals.get("plugin");
+		
+		String output = null;
+		
+		try
+		{
+			LuaValue res = pluginFunc.call(LuaValue.valueOf(args));
+			
+			if(res.isnil())
+				output = null;
+			else
+				output = res.toString();
+		}
+		catch(Exception e)
+		{
+			output = null;
+		}
+		
+		return output;
+	}
+}

src/core/lua/PluginLog.java

@@ -0,0 +1,11 @@
+package core.lua;
+
+import utils.GlobalLog;
+import utils.LogFilter;
+
+public class PluginLog
+{
+	public static void Log(String s) { GlobalLog.Log(LogFilter.Plugin, s); }
+	public static void Warn(String s) { GlobalLog.Warn(LogFilter.Plugin, s); }
+	public static void Error(String s) { GlobalLog.Error(LogFilter.Plugin, s); }
+}

src/core/lua/PluginManager.java

@@ -0,0 +1,64 @@
+package core.lua;
+
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.function.Consumer;
+import java.util.stream.Stream;
+
+//Reads in, handles, and manipulates plugins. Plugins are 
+//loaded in the order they appear in the folder.
+public class PluginManager
+{
+	public PluginLoader pluginLoader;
+	public final String pluginFolder;
+	public ArrayList<Plugin> plugins;
+
+	public void AddPlugin(Path path)
+	{
+		plugins.add(new Plugin(path));
+	}
+	
+	public PluginManager(String folder)
+	{
+		this.pluginFolder = folder;
+		plugins = new ArrayList<Plugin>();
+		this.pluginLoader = new PluginLoader();
+		
+		try
+		{
+			try (Stream<Path> paths = Files.walk(Paths.get(this.pluginFolder)))
+			{
+				paths.filter(Files::isRegularFile).forEach((path)->{ AddPlugin(path); });
+			}
+		}
+		catch(Exception e)
+		{
+			PluginLog.Error(e.getMessage());
+		}
+	}
+	
+	public String CallAll(String input)
+	{
+		for(int i = 0; i < plugins.size(); ++i)
+		{
+			Plugin script = plugins.get(i);
+			String out = pluginLoader.Process(script, input);
+			
+			if(out != null)
+			{
+				PluginLog.Log("Executed plugin at " + script.filepath);
+				return out;
+			}
+		}
+		
+		return null;
+	}
+	
+	public void PrintAll()
+	{
+		for(int i = 0; i < plugins.size(); ++i)
+			PluginLog.Log(plugins.get(i).contents.toString());
+	}
+}

src/main/Main.java

@@ -2,6 +2,7 @@ package main;
 
 import javax.security.auth.login.LoginException;
 import core.*;
+import core.lua.PluginManager;
 import dataStructures.KittyChannel;
 import dataStructures.KittyGuild;
 import dataStructures.KittyRole;
@@ -22,14 +23,15 @@ import net.dv8tion.jda.core.*;
 @SuppressWarnings("unused")
 public class Main extends ListenerAdapter
 {
-	// Variables and stuff
+	// Variables and bot specific objects
 	private static JDA kitty;
-	private static CommandManager commandManager;
-	private static CommandEnabler commandEnabler;
 	private static DatabaseManager databaseManager; 
+	private static CommandEnabler commandEnabler;
+	private static CommandManager commandManager;
 	private static Stats stats;
 	private static RPManager rpManager;
-
+	private static PluginManager pluginManager;
+	
 	// Main test location
 	public static void main(String[] args) throws InterruptedException, LoginException, Exception
 	{
@@ -37,8 +39,9 @@ public class Main extends ListenerAdapter
 		databaseManager = ObjectBuilderFactory.ConstructDatabaseManager();
 		commandEnabler = ObjectBuilderFactory.ConstructCommandEnabler();
 		commandManager = ObjectBuilderFactory.ConstructCommandManager(commandEnabler);
-		rpManager = ObjectBuilderFactory.ConstructRPManager();
 		stats = ObjectBuilderFactory.ConstructStats(commandManager);
+		rpManager = ObjectBuilderFactory.ConstructRPManager();
+		pluginManager = ObjectBuilderFactory.ConstructPluginManager();
 		
 		// Bot startup
 		kitty = new JDABuilder(AccountType.BOT).setToken(Ref.TestToken).buildBlocking();
@@ -61,19 +64,25 @@ public class Main extends ListenerAdapter
 		// Specialized uncached objects
 		Response response = new Response(event, kitty);
 		UserInput input = new UserInput(event, guild);
-
+		
 		// Tweak object construction as necessary
 		if(!PostProcessSetup(event, user, guild, channel, response, input))
 			return;
-		
+				
 		// Track beans!
-		user.ChangeBeans(1);
+		user.ChangeBeans(1);		
 		
 		// RP logging system
 		RPManager.instance.addLine(channel, user, input);
 		
-		// Issue the command
-		commandManager.InvokeOnNewThread(guild, channel, user, input, response);
+		// Run plugins right before invoking the commands but after all other setup
+		String output = pluginManager.CallAll(input.message);
+		
+		// Spin up the command if no plugins ran. Otherwise, send a response.
+		if(output == null)
+			commandManager.InvokeOnNewThread(guild, channel, user, input, response);
+		else
+			response.Call(output);
 		
 		// Run any upkeep we need to
 		PerCommandUpkeep();

src/utils/LogFilter.java

@@ -3,7 +3,7 @@ package utils;
 public enum LogFilter
 {
 	// Assign numbers as flags, so we can | ('or') them together as necessary
-	Debug(0), Command(1), Core(2), Util(4), Database(8), Response(16), Network(32), Strings(64);  
+	Debug(0), Command(1), Core(2), Util(4), Database(8), Response(16), Network(32), Strings(64), Plugin(128);  
 	
 	private final int value;
 	private LogFilter(int value)