Copilot Studio Agent Direct Line MCP Server

/** * Environment configuration loader and validator */ import { config as loadDotenv } from 'dotenv'; import { z } from 'zod'; import { envSchema, type EnvConfig as EnvConfigType } from './env.schema.js'; /** * Re-export EnvConfig type */ export type EnvConfig = EnvConfigType; /** * Environment validation error */ export class EnvValidationError extends Error { constructor( message: string, public readonly errors: z.ZodError ) { super(message); this.name = 'EnvValidationError'; } } /** * Load and validate environment variables * @returns Validated environment configuration * @throws {EnvValidationError} If validation fails */ export function loadEnvironment(): EnvConfig { // Load .env file in development (if it exists) loadDotenv(); try { // Parse and validate environment variables const result = envSchema.safeParse(process.env); if (!result.success) { // Collect all validation errors const errorMessages = result.error.errors.map((err) => { const path = err.path.join('.'); return ` - ${path}: ${err.message}`; }); throw new EnvValidationError( `Environment validation failed:\n${errorMessages.join('\n')}`, result.error ); } return result.data; } catch (error) { if (error instanceof EnvValidationError) { throw error; } throw new Error(`Failed to load environment: ${error}`); } } /** * Cached environment configuration */ let cachedEnv: EnvConfig | null = null; /** * Get validated environment configuration (cached) * @returns Validated environment configuration */ export function getEnv(): EnvConfig { if (!cachedEnv) { cachedEnv = loadEnvironment(); } return cachedEnv; } /** * Reset environment cache (useful for testing) */ export function resetEnvCache(): void { cachedEnv = null; }