Code Summarizer MCP

import * as dotenv from 'dotenv'; import * as fs from 'fs'; import * as path from 'path'; import { ConfigType, defaultConfig } from './schema.js'; // Load environment variables dotenv.config(); // Simple config store implementation that uses a JSON file class ConfigStore { private data: ConfigType; private filePath: string; constructor() { // Use config.json in the project root this.filePath = path.resolve(process.cwd(), 'config.json'); this.data = this.load(); } private load(): ConfigType { try { // Always prioritize environment variables for sensitive data const apiKey = process.env.GOOGLE_API_KEY || ''; if (fs.existsSync(this.filePath)) { const content = fs.readFileSync(this.filePath, 'utf-8'); const fileConfig = JSON.parse(content); // Don't load API key from file if env var exists return { ...fileConfig, apiKey: apiKey || fileConfig.apiKey || defaultConfig.apiKey }; } // If no file, use default with environment variables return { ...defaultConfig, apiKey }; } catch (error) { console.error(`Error loading config from ${this.filePath}:`, error); return { ...defaultConfig, apiKey: process.env.GOOGLE_API_KEY || defaultConfig.apiKey }; } } save(): void { try { // Create a sanitized version for storage (without sensitive data) const storageData = { ...this.data }; // Only write API key to file if not available as env var if (process.env.GOOGLE_API_KEY) { storageData.apiKey = ''; // Don't save actual API key to file when using env var } fs.writeFileSync(this.filePath, JSON.stringify(storageData, null, 2)); } catch (error) { console.error(`Error saving config to ${this.filePath}:`, error); } } get store(): ConfigType { // Always get the most recent environment variable if (process.env.GOOGLE_API_KEY) { this.data.apiKey = process.env.GOOGLE_API_KEY; } return this.data; } set(key: string, value: any): void { (this.data as any)[key] = value; this.save(); } clear(): void { this.data = { ...defaultConfig, apiKey: process.env.GOOGLE_API_KEY || defaultConfig.apiKey }; this.save(); } } // Create configuration store const store = new ConfigStore(); /** * Get current configuration */ export function getConfig(): ConfigType { return store.store; } /** * Update configuration */ export function updateConfig(config: Partial<ConfigType>): ConfigType { // Merge with existing config const newConfig = { ...store.store, ...config }; // Update store Object.entries(config).forEach(([key, value]) => { store.set(key, value); }); return store.store; } /** * Validate API key format * Returns true if valid, false if invalid */ export function validateApiKey(apiKey: string): boolean { // Basic validation - adjust based on your API key format return /^[A-Za-z0-9_-]{10,}$/.test(apiKey); } /** * Set API key with validation * @throws Error if API key is invalid */ export function setApiKey(apiKey: string): void { if (!validateApiKey(apiKey)) { throw new Error('Invalid API key format'); } updateConfig({ apiKey }); } /** * Set server port */ export function setPort(port: number): void { updateConfig({ port }); } /** * Set default summary options */ export function setSummaryOptions(options: ConfigType['summaryOptions']): void { updateConfig({ summaryOptions: options }); } /** * Reset configuration to defaults */ export function resetConfig(): void { store.clear(); }