feat(plugins): implement plugin system with discovery and management

package.json

@@ -5,10 +5,10 @@
   "main": "index.ts",
   "scripts": {
     "start": "node --enable-source-maps --import ./build/src/pathman.js build/src/index.js",
-    "build": "tsgo --sourceMap && ncp static/webui build/static/webui",
-    "build:tsc": "tsc --incremental --sourceMap && ncp static/webui build/static/webui",
-    "build:dev": "tsgo --sourceMap",
-    "build:dev:tsc": "tsc --incremental --sourceMap",
+    "build": "node scripts/plugin-discovery.js && tsgo --sourceMap && ncp static/webui build/static/webui && ncp plugins build/plugins",
+    "build:tsc": "node scripts/plugin-discovery.js && tsc --incremental --sourceMap && ncp static/webui build/static/webui && ncp plugins build/plugins",
+    "build:dev": "node scripts/plugin-discovery.js && tsgo --sourceMap",
+    "build:dev:tsc": "node scripts/plugin-discovery.js && tsc --incremental --sourceMap",
     "build-and-start": "npm run build && npm run start",
     "build-and-start:bun": "npm run verify && npm run bun-run",
     "dev": "node scripts/dev.js",

plugins/.gitignore

@@ -0,0 +1,5 @@
+*
+
+!.gitignore
+!ExamplePlugin/
+!ExamplePlugin/**

plugins/ExamplePlugin/index.ts

@@ -0,0 +1,30 @@
+import { IPlugin } from "@/src/types/pluginTypes";
+import { logger } from "@/src/utils/logger";
+
+export default class ExamplePlugin implements IPlugin {
+    public name = "ExamplePlugin";
+    public version = "1.0.0";
+    public description = "Example plugin for the server";
+    public author = "Your Name";
+
+    async initialize(): Promise<void> {
+        logger.info(`[${this.name}] Plugin initialized successfully!`);
+        
+        // Add your plugin initialization logic here
+        // For example:
+        // - Register new routes
+        // - Add new API endpoints
+        // - Set up event listeners
+        // - Connect to external services
+    }
+
+    async cleanup(): Promise<void> {
+        logger.info(`[${this.name}] Plugin cleanup completed`);
+        
+        // Add your cleanup logic here
+        // For example:
+        // - Close database connections
+        // - Clear timers/intervals
+        // - Remove event listeners
+    }
+}

plugins/ExamplePlugin/plugin.json

@@ -0,0 +1,11 @@
+{
+    "name": "ExamplePlugin",
+    "version": "1.0.0",
+    "description": "Example plugin for the server",
+    "author": "Your Name",
+    "main": "index.js",
+    "dependencies": [],
+    "config": {
+        "enabled": false
+    }
+}

scripts/plugin-discovery.js

@@ -0,0 +1,127 @@
+/**
+ * Plugin Discovery Script
+ * This script runs during build time to discover all plugins and generate a registry
+ */
+
+const fs = require('fs');
+const path = require('path');
+
+class PluginDiscovery {
+    constructor(pluginsDir = 'plugins', outputPath = 'build/plugin-registry.json') {
+        this.pluginsDir = path.resolve(pluginsDir);
+        this.outputPath = path.resolve(outputPath);
+    }
+
+    /**
+     * Discover all plugins in the plugins directory
+     */
+    discoverPlugins() {
+        const registry = {
+            plugins: [],
+            manifest: {},
+            buildTime: new Date().toISOString()
+        };
+
+        console.log(`🔍 Discovering plugins in: ${this.pluginsDir}`);
+
+        if (!fs.existsSync(this.pluginsDir)) {
+            console.log('⚠️  Plugins directory not found, creating empty registry');
+            return registry;
+        }
+
+        const pluginDirs = fs.readdirSync(this.pluginsDir, { withFileTypes: true })
+            .filter(dirent => dirent.isDirectory())
+            .map(dirent => dirent.name);
+
+        for (const pluginDir of pluginDirs) {
+            const pluginPath = path.join(this.pluginsDir, pluginDir);
+            const manifest = this.loadPluginManifest(pluginPath);
+
+            if (manifest) {
+                registry.plugins.push(pluginPath);
+                registry.manifest[manifest.name] = manifest;
+                console.log(`✅ Found plugin: ${manifest.name} v${manifest.version}`);
+            } else {
+                console.log(`❌ Invalid plugin: ${pluginDir} (missing or invalid plugin.json)`);
+            }
+        }
+
+        console.log(`📦 Discovered ${registry.plugins.length} plugins`);
+        return registry;
+    }
+
+    /**
+     * Load and validate plugin manifest
+     */
+    loadPluginManifest(pluginPath) {
+        try {
+            const manifestPath = path.join(pluginPath, 'plugin.json');
+            
+            if (!fs.existsSync(manifestPath)) {
+                return null;
+            }
+
+            const manifestContent = fs.readFileSync(manifestPath, 'utf-8');
+            const manifest = JSON.parse(manifestContent);
+
+            // Validate required fields
+            if (!manifest.name || !manifest.version || !manifest.main) {
+                console.log(`⚠️  Invalid manifest in ${pluginPath}: missing required fields (name, version, main)`);
+                return null;
+            }
+
+            // Check if main file exists
+            const mainFile = path.join(pluginPath, manifest.main);
+            const mainTsFile = mainFile.replace(/\.js$/, '.ts');
+            
+            if (!fs.existsSync(mainFile) && !fs.existsSync(mainTsFile)) {
+                console.log(`⚠️  Main file not found: ${mainFile} or ${mainTsFile}`);
+                return null;
+            }
+
+            return manifest;
+        } catch (error) {
+            console.log(`❌ Failed to load manifest from ${pluginPath}:`, error.message);
+            return null;
+        }
+    }
+
+    /**
+     * Save the plugin registry to file
+     */
+    saveRegistry(registry) {
+        try {
+            // Ensure output directory exists
+            const outputDir = path.dirname(this.outputPath);
+            if (!fs.existsSync(outputDir)) {
+                fs.mkdirSync(outputDir, { recursive: true });
+            }
+
+            fs.writeFileSync(this.outputPath, JSON.stringify(registry, null, 2));
+            console.log(`💾 Plugin registry saved to: ${this.outputPath}`);
+        } catch (error) {
+            console.error(`❌ Failed to save plugin registry:`, error.message);
+            process.exit(1);
+        }
+    }
+
+    /**
+     * Main execution function
+     */
+    run() {
+        console.log('🚀 Starting plugin discovery...');
+        
+        const registry = this.discoverPlugins();
+        this.saveRegistry(registry);
+        
+        console.log('✨ Plugin discovery completed!');
+    }
+}
+
+// Run the plugin discovery if this script is executed directly
+if (require.main === module) {
+    const discovery = new PluginDiscovery();
+    discovery.run();
+}
+
+module.exports = { PluginDiscovery };

src/index.ts

@@ -23,18 +23,36 @@ import { startWebServer } from "./services/webService";
 
 import { syncConfigWithDatabase, validateConfig } from "@/src/services/configWatcherService";
 import { updateWorldStateCollections } from "./services/worldStateService";
+import { pluginManager } from "@/src/managers/pluginManager";
 
 // Patch JSON.stringify to work flawlessly with Bigints.
 JSON.stringify = JSONStringify;
 
 validateConfig();
 
+// Handle graceful shutdown
+process.on('SIGINT', async () => {
+    logger.info('Received SIGINT, starting graceful shutdown...');
+    await pluginManager.cleanup();
+    process.exit(0);
+});
+
+process.on('SIGTERM', async () => {
+    logger.info('Received SIGTERM, starting graceful shutdown...');
+    await pluginManager.cleanup();
+    process.exit(0);
+});
+
 mongoose
     .connect(config.mongodbUrl)
-    .then(() => {
+    .then(async () => {
         logger.info("Connected to MongoDB");
         syncConfigWithDatabase();
 
+        // Initialize plugins before starting the web server
+        logger.info("Loading plugins...");
+        await pluginManager.loadPlugins();
+
         startWebServer();
 
         void updateWorldStateCollections();

src/managers/pluginManager.ts

@@ -0,0 +1,161 @@
+import { logger } from "@/src/utils/logger";
+import { IPlugin, PluginInfo, PluginManifest } from "@/src/types/pluginTypes";
+import fs from "fs";
+import path from "path";
+import { pathToFileURL } from "url";
+
+export class PluginManager {
+    private plugins: Map<string, IPlugin> = new Map();
+    private pluginInfos: Map<string, PluginInfo> = new Map();
+    private pluginsDir: string;
+
+    constructor(pluginsDir: string = "plugins") {
+        this.pluginsDir = path.resolve(pluginsDir);
+    }
+
+    /**
+     * Load all plugins from the plugins directory
+     */
+    async loadPlugins(): Promise<void> {
+        try {
+            // Load plugin registry generated at build time
+            const pluginRegistryPath = path.resolve("build/plugin-registry.json");
+            if (!fs.existsSync(pluginRegistryPath)) {
+                logger.info("No plugin registry found, skipping plugin loading");
+                return;
+            }
+
+            const pluginRegistry = JSON.parse(fs.readFileSync(pluginRegistryPath, "utf-8"));
+            logger.info(`Found ${pluginRegistry.plugins.length} plugins in registry`);
+
+            for (const pluginPath of pluginRegistry.plugins) {
+                await this.loadPlugin(pluginPath);
+            }
+
+            logger.info(`Successfully loaded ${this.plugins.size} plugins`);
+        } catch (error) {
+            logger.error("Failed to load plugins:", error);
+        }
+    }
+
+    /**
+     * Load a single plugin
+     */
+    private async loadPlugin(pluginPath: string): Promise<void> {
+        try {
+            const absolutePath = path.resolve(pluginPath);
+            const manifestPath = path.join(absolutePath, "plugin.json");
+            
+            if (!fs.existsSync(manifestPath)) {
+                logger.warn(`Plugin manifest not found: ${manifestPath}`);
+                return;
+            }
+
+            const manifest: PluginManifest = JSON.parse(fs.readFileSync(manifestPath, "utf-8"));
+            
+            // Check if plugin is enabled from config
+            const pluginInfo: PluginInfo = {
+                manifest,
+                path: absolutePath,
+                enabled: manifest.config?.enabled ?? true
+            };
+
+            if (!pluginInfo.enabled) {
+                logger.info(`Plugin ${manifest.name} is disabled, skipping`);
+                return;
+            }
+
+            // Load the plugin module from build directory
+            const pluginName = path.basename(absolutePath);
+            const buildPluginPath = path.resolve("build/plugins", pluginName);
+            const mainFile = path.join(buildPluginPath, manifest.main || "index.js");
+            if (!fs.existsSync(mainFile)) {
+                logger.error(`Plugin main file not found: ${mainFile}`);
+                return;
+            }
+
+            const pluginModule = await import(pathToFileURL(mainFile).href);
+            const PluginClass = pluginModule.default?.default || pluginModule.default || pluginModule[manifest.name];
+            
+            if (!PluginClass) {
+                logger.error(`Plugin class not found in ${mainFile}`);
+                return;
+            }
+
+            const plugin: IPlugin = new PluginClass();
+            
+            // Validate plugin interface
+            if (!this.validatePlugin(plugin)) {
+                logger.error(`Plugin ${manifest.name} does not implement required interface`);
+                return;
+            }
+
+            // Initialize the plugin
+            await plugin.initialize();
+            
+            this.plugins.set(manifest.name, plugin);
+            this.pluginInfos.set(manifest.name, pluginInfo);
+            
+            logger.info(`Loaded plugin: ${manifest.name} v${manifest.version}`);
+        } catch (error) {
+            logger.error(`Failed to load plugin from ${pluginPath}:`, error);
+        }
+    }
+
+    /**
+     * Validate that a plugin implements the required interface
+     */
+    private validatePlugin(plugin: any): plugin is IPlugin {
+        return (
+            plugin &&
+            typeof plugin.name === "string" &&
+            typeof plugin.version === "string" &&
+            typeof plugin.initialize === "function"
+        );
+    }
+
+    /**
+     * Get a plugin by name
+     */
+    getPlugin(name: string): IPlugin | undefined {
+        return this.plugins.get(name);
+    }
+
+    /**
+     * Get all loaded plugins
+     */
+    getAllPlugins(): Map<string, IPlugin> {
+        return new Map(this.plugins);
+    }
+
+    /**
+     * Get plugin info
+     */
+    getPluginInfo(name: string): PluginInfo | undefined {
+        return this.pluginInfos.get(name);
+    }
+
+    /**
+     * Cleanup all plugins
+     */
+    async cleanup(): Promise<void> {
+        logger.info("Cleaning up plugins...");
+        
+        for (const [name, plugin] of this.plugins) {
+            try {
+                if (plugin.cleanup) {
+                    await plugin.cleanup();
+                }
+                logger.info(`Cleaned up plugin: ${name}`);
+            } catch (error) {
+                logger.error(`Failed to cleanup plugin ${name}:`, error);
+            }
+        }
+        
+        this.plugins.clear();
+        this.pluginInfos.clear();
+    }
+}
+
+// Global plugin manager instance
+export const pluginManager = new PluginManager();

src/types/pluginTypes.ts

@@ -0,0 +1,52 @@
+export interface IPlugin {
+    /**
+     * Plugin name
+     */
+    name: string;
+    
+    /**
+     * Plugin version
+     */
+    version: string;
+    
+    /**
+     * Plugin description
+     */
+    description?: string;
+    
+    /**
+     * Plugin author
+     */
+    author?: string;
+    
+    /**
+     * Initialize the plugin
+     */
+    initialize(): Promise<void> | void;
+    
+    /**
+     * Cleanup plugin resources
+     */
+    cleanup?(): Promise<void> | void;
+    
+    /**
+     * Plugin configuration
+     */
+    config?: any;
+}
+
+export interface PluginManifest {
+    name: string;
+    version: string;
+    description?: string;
+    author?: string;
+    main: string;
+    dependencies?: string[];
+    config?: any;
+}
+
+export interface PluginInfo {
+    manifest: PluginManifest;
+    path: string;
+    enabled: boolean;
+}