= Updated plugins to each have their own global context

plugins/example.lua

@@ -1,6 +1,7 @@
 -- 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.
+-- 'local' Variables inside of this file persiste between plugin calls.
 function plugin(message)
 	return nil;
 end

src/core/CommandManager.java

@@ -74,35 +74,40 @@ public class CommandManager
 	}
 	
 	// Calls the command but on a whole new thread!
-	public void InvokeOnNewThread(KittyGuild guild, KittyChannel channel, KittyUser user, UserInput input, Response responseContext)
+	public boolean InvokeOnNewThread(KittyGuild guild, KittyChannel channel, KittyUser user, UserInput input, Response responseContext)
 	{
 		// This is here to prevent spinning up a thread if this wasn't even a command.
 		if(input == null || !input.IsValid())
-			return;
+			return false;
 		
-		// Spin up a thread and begin it. The thread carries the info needed to invoke the command.
+		Command command = commands.get(input.key);
-		CommandThread newThread = new CommandThread(this, input, guild, channel, user, responseContext);
+		if(command != null)
-		threadAccumulator.add(newThread);
+		{
-		newThread.start();
+			// Spin up a thread and begin it. The thread carries the info needed to invoke the command.
+			CommandThread newThread = new CommandThread(this, input, guild, channel, user, responseContext);
+			threadAccumulator.add(newThread);
+			newThread.start();
+			return true;
+		}
+		else
+		{
+			GlobalLog.Warn(LogFilter.Command, "User " + user.name + " tried to invoke command that doesn't exist: " + input.key);
+			return false;
+		}
 	}
 	
 	// Calls the command specified with the key, providing user information arguments, etc.
-	public void Invoke(KittyGuild guild, KittyChannel channel, KittyUser user, UserInput input, Response responseContext)
+	void Invoke(KittyGuild guild, KittyChannel channel, KittyUser user, UserInput input, Response responseContext)
 	{
 		if(input == null || !input.IsValid())
 			return;
 		
 		Command command = commands.get(input.key);
-		
 		if(command != null)
 		{
 			++invokeCount;
 			command.Invoke(guild, channel, user, input, responseContext);
 		}
-		else
-		{
-			GlobalLog.Warn(LogFilter.Command, "User " + user.name + " tried to invoke command that doesn't exist: " + input.key);
-		}
 	}
 	
 	// Looks up command by name. If it exists, dumps help text, otherwise returns null.

src/core/lua/Plugin.java

@@ -6,17 +6,25 @@ 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.
+import org.luaj.vm2.Globals;
-//They are executed between the initial built-in preprocessing and the command parsing.
+import org.luaj.vm2.LuaValue;
+import org.luaj.vm2.lib.jse.JsePlatform;
+
+// To promote flexibility, plugins are lua file with predefined callbacks.
+// They are executed between the initial built-in preprocessing and the command parsing.
+// This class wraps the lua layer - provides all the processing and function calls to the lua binding.
 public class Plugin
 {
 	public Path filepath;
 	public String contents;
+	private Globals globals;
+	private LuaValue func_plugin;
 	
 	public Plugin(Path filepath)
 	{
 		this.filepath = filepath;
 		
+		
 		StringBuilder contentBuilder = new StringBuilder();
 
 		try 
@@ -25,10 +33,34 @@ public class Plugin
 			stream.forEach(str -> contentBuilder.append(str).append("\n"));
 			stream.close();
 			contents = contentBuilder.toString();
+			
+			globals = JsePlatform.standardGlobals();
+
+			globals.load(contents).call();
+			func_plugin = globals.get("plugin");
+			
+			String output = null;
 		}
 		catch (IOException e)
 		{
 			PluginLog.Error(e.getMessage());
 		}
 	}
+	
+	public String Run(String args)
+	{
+		try
+		{
+			LuaValue res = func_plugin.call(LuaValue.valueOf(args));
+			
+			if(!res.isnil())
+				return res.toString();
+		}
+		catch(Exception e)
+		{
+			PluginLog.Error("Failed to run plugin from file " + filepath);
+		}
+		
+		return null;
+	}
 }

src/core/lua/PluginLoader.java

@@ -1,42 +0,0 @@
-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/PluginManager.java

@@ -9,7 +9,6 @@ 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;
 
@@ -22,7 +21,6 @@ public class PluginManager
 	{
 		this.pluginFolder = folder;
 		plugins = new ArrayList<Plugin>();
-		this.pluginLoader = new PluginLoader();
 
 		try
 		{
@@ -37,16 +35,18 @@ public class PluginManager
 		}
 	}
 	
-	public String CallAll(String input)
+	// Runs all plugins, returning when it gets a non-nill result.
+	// Otherwise, returns null.
+	public String RunAll(String input)
 	{
 		for(int i = 0; i < plugins.size(); ++i)
 		{
-			Plugin script = plugins.get(i);
+			Plugin plugin = plugins.get(i);
-			String out = pluginLoader.Process(script, input);
+			String out = plugin.Run(input);
 			
 			if(out != null)
 			{
-				PluginLog.Log("Executed plugin at " + script.filepath);
+				PluginLog.Log("Executed plugin at " + plugin.filepath);
 				return out;
 			}
 		}

src/main/Main.java

@@ -75,14 +75,18 @@ public class Main extends ListenerAdapter
 		// RP logging system
 		RPManager.instance.addLine(channel, user, input);
 		
-		// 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)
+		// Attempt to spin up a command. If the command doesn't exist.
-			commandManager.InvokeOnNewThread(guild, channel, user, input, response);
+		// Run plugins right before invoking the commands but after all other setup.
-		else
+		if(commandManager.InvokeOnNewThread(guild, channel, user, input, response) == false)
-			response.Call(output);
+		{
+			String pluginOutput = pluginManager.RunAll(input.message);
+			
+			if(pluginOutput != null)
+				response.Call(pluginOutput);
+		}
 		
 		// Run any upkeep we need to
 		PerCommandUpkeep();