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<!doctype html> <html lang="en"> <head> <title>Code coverage report for src/config/index.ts</title> <meta charset="utf-8" /> <link rel="stylesheet" href="../../prettify.css" /> <link rel="stylesheet" href="../../base.css" /> <link rel="shortcut icon" type="image/x-icon" href="../../favicon.png" /> <meta name="viewport" content="width=device-width, initial-scale=1" /> <style type='text/css'> .coverage-summary .sorter { background-image: url(../../sort-arrow-sprite.png); } </style> </head> <body> <div class='wrapper'> <div class='pad1'> <h1><a href="../../index.html">All files</a> / <a href="index.html">src/config</a> index.ts</h1> <div class='clearfix'> <div class='fl pad1y space-right2'> 96.52% Statements 111/115 </div> <div class='fl pad1y space-right2'> 89.55% Branches 60/67 </div> <div class='fl pad1y space-right2'> 100% Functions 17/17 </div> <div class='fl pad1y space-right2'> 98.09% Lines 103/105 </div> </div> Press n or j to go to the next uncovered block, b, p or k for the previous block. <template id="filterTemplate"> <div class="quiet"> Filter: <input type="search" id="fileSearch"> </div> </template> </div> <div class='status-line high'></div> <pre><table class="coverage"> <tr><td class="line-count quiet"><a name='L1'></a><a href='#L1'>1</a> <a name='L2'></a><a href='#L2'>2</a> <a name='L3'></a><a href='#L3'>3</a> <a name='L4'></a><a href='#L4'>4</a> <a name='L5'></a><a href='#L5'>5</a> <a name='L6'></a><a href='#L6'>6</a> <a name='L7'></a><a href='#L7'>7</a> <a name='L8'></a><a href='#L8'>8</a> <a name='L9'></a><a href='#L9'>9</a> <a name='L10'></a><a href='#L10'>10</a> <a name='L11'></a><a href='#L11'>11</a> <a name='L12'></a><a href='#L12'>12</a> <a name='L13'></a><a href='#L13'>13</a> <a name='L14'></a><a href='#L14'>14</a> <a name='L15'></a><a href='#L15'>15</a> <a name='L16'></a><a href='#L16'>16</a> <a name='L17'></a><a href='#L17'>17</a> <a name='L18'></a><a href='#L18'>18</a> <a name='L19'></a><a href='#L19'>19</a> <a name='L20'></a><a 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    23x                     1074x 264x 264x   221x 221x 980x 980x     221x             10x   10x 15x 15x 6x   9x         10x             1x       3x 3x 3x   3x           1x</td><td class="text"><pre class="prettyprint lang-js">/** * Configuration system for Visa Design System MCP Server * Supports environment variables, default values, and validation */   import { join } from 'path'; import { readFile, access } from 'fs/promises';   export interface ServerConfig { /** Server name for MCP identification */ name: string; /** Server version */ version: string; /** Port for HTTP server (if enabled) */ port: number; /** Enable HTTP server alongside stdio */ enableHttp: boolean; /** Log level for server operations */ logLevel: 'error' | 'warn' | 'info' | 'debug'; /** Enable detailed request/response logging */ enableRequestLogging: boolean; }   export interface DataConfig { /** Path to design system data files */ dataPath: string; /** Enable file watching for automatic updates */ enableFileWatching: boolean; /** Cache timeout in milliseconds */ cacheTimeout: number; /** Maximum cache size in MB */ maxCacheSize: number; /** Enable data validation on load */ enableValidation: boolean; }   export interface SecurityConfig { /** Enable authentication (future feature) */ enableAuth: boolean; /** API key for authentication (if enabled) */ apiKey?: string; /** Allowed origins for CORS (if HTTP enabled) */ allowedOrigins: string[]; /** Rate limiting - requests per minute */ rateLimitRpm: number; }   export interface PerformanceConfig { /** Maximum concurrent requests */ maxConcurrentRequests: number; /** Request timeout in milliseconds */ requestTimeout: number; /** Enable response compression */ enableCompression: boolean; /** Memory usage warning threshold in MB */ memoryWarningThreshold: number; }   export interface MCPServerConfiguration { server: ServerConfig; data: DataConfig; security: SecurityConfig; performance: PerformanceConfig; }   /** * Default configuration values */ const DEFAULT_CONFIG: MCPServerConfiguration = { server: { name: 'visa-design-system-mcp', version: '1.0.0', port: 3000, enableHttp: false, logLevel: 'info', enableRequestLogging: false }, data: { dataPath: join(process.cwd(), 'data'), enableFileWatching: true, cacheTimeout: 300000, // 5 minutes maxCacheSize: 100, // 100 MB enableValidation: true }, security: { enableAuth: false, allowedOrigins: ['*'], rateLimitRpm: 1000 }, performance: { maxConcurrentRequests: 100, requestTimeout: 30000, // 30 seconds enableCompression: true, memoryWarningThreshold: 512 // 512 MB } };   /** * Environment variable mappings */ const ENV_MAPPINGS = { // Server configuration 'MCP_SERVER_NAME': 'server.name', 'MCP_SERVER_VERSION': 'server.version', 'MCP_SERVER_PORT': 'server.port', 'MCP_ENABLE_HTTP': 'server.enableHttp', 'MCP_LOG_LEVEL': 'server.logLevel', 'MCP_ENABLE_REQUEST_LOGGING': 'server.enableRequestLogging',   // Data configuration 'MCP_DATA_PATH': 'data.dataPath', 'MCP_ENABLE_FILE_WATCHING': 'data.enableFileWatching', 'MCP_CACHE_TIMEOUT': 'data.cacheTimeout', 'MCP_MAX_CACHE_SIZE': 'data.maxCacheSize', 'MCP_ENABLE_VALIDATION': 'data.enableValidation',   // Security configuration 'MCP_ENABLE_AUTH': 'security.enableAuth', 'MCP_API_KEY': 'security.apiKey', 'MCP_ALLOWED_ORIGINS': 'security.allowedOrigins', 'MCP_RATE_LIMIT_RPM': 'security.rateLimitRpm',   // Performance configuration 'MCP_MAX_CONCURRENT_REQUESTS': 'performance.maxConcurrentRequests', 'MCP_REQUEST_TIMEOUT': 'performance.requestTimeout', 'MCP_ENABLE_COMPRESSION': 'performance.enableCompression', 'MCP_MEMORY_WARNING_THRESHOLD': 'performance.memoryWarningThreshold' } as const;   export interface ConfigValidationResult { valid: boolean; errors?: string[]; warnings?: string[]; }   /** * Configuration loader and validator */ export class ConfigurationManager { private config: MCPServerConfiguration; private configFilePath?: string;   constructor(configFilePath?: string) { this.config = this.deepClone(DEFAULT_CONFIG); this.configFilePath = configFilePath; }   /** * Load configuration from environment variables and optional config file */ async loadConfiguration(): Promise<ConfigValidationResult> { const errors: string[] = []; const warnings: string[] = [];   try { // Load from config file if specified if (this.configFilePath) { const fileResult = await this.loadFromFile(this.configFilePath); if (!fileResult.success && fileResult.errors) { errors.push(...fileResult.errors); } else if (fileResult.warnings) { warnings.push(...fileResult.warnings); } }   // Load from environment variables (overrides file config) this.loadFromEnvironment();   // Validate the final configuration const validation = this.validateConfiguration(); if (!validation.valid && validation.errors) { errors.push(...validation.errors); } if (validation.warnings) { warnings.push(...validation.warnings); }   return { valid: errors.length === 0, errors: errors.length > 0 ? errors : undefined, warnings: warnings.length > 0 ? warnings : undefined };   } catch (error) { return { valid: false, errors: [`Failed to load configuration: ${error instanceof Error ? error.message : 'Unknown error'}`] }; } }   /** * Get the current configuration */ getConfiguration(): MCPServerConfiguration { return this.deepClone(this.config); }   /** * Get a specific configuration section */ getServerConfig(): ServerConfig { return { ...this.config.server }; }   getDataConfig(): DataConfig { return { ...this.config.data }; }   getSecurityConfig(): SecurityConfig { return { ...this.config.security }; }   getPerformanceConfig(): PerformanceConfig { return { ...this.config.performance }; }   /** * Load configuration from a JSON file */ private async loadFromFile(filePath: string): Promise<{ success: boolean; errors?: string[]; warnings?: string[] }> { try { // Check if file exists try { await access(filePath); } catch { return { success: false, warnings: [`Configuration file not found: ${filePath}, using defaults`] }; }   const content = await readFile(filePath, 'utf-8'); const fileConfig = JSON.parse(content);   // Merge with current config this.config = this.deepMerge(this.config, fileConfig);   return { success: true };   } catch (error) { return { success: false, errors: [`Failed to load config file: ${error instanceof Error ? error.message : 'Unknown error'}`] }; } }   /** * Load configuration from environment variables */ private loadFromEnvironment(): void { for (const [envVar, configPath] of Object.entries(ENV_MAPPINGS)) { const value = process.env[envVar]; if (value !== undefined) { this.setNestedValue(this.config, configPath, this.parseEnvValue(value)); } } }   /** * Parse environment variable value to appropriate type */ private parseEnvValue(value: string): any { // Boolean values if (value.toLowerCase() === 'true') return true; if (value.toLowerCase() === 'false') return false;   // Number values if (/^\d+$/.test(value)) return parseInt(value, 10); Iif (/^\d+\.\d+$/.test(value)) return parseFloat(value);   // Array values (comma-separated) if (value.includes(',')) { return value.split(',').map(item => item.trim()); }   // String values return value; }   /** * Set nested object value using dot notation */ private setNestedValue(obj: any, path: string, value: any): void { const keys = path.split('.'); let current = obj;   for (let i = 0; i < keys.length - 1; i++) { const key = keys[i]; Iif (!(key in current) || typeof current[key] !== 'object') { current[key] = {}; } current = current[key]; }   current[keys[keys.length - 1]] = value; }   /** * Validate the configuration */ private validateConfiguration(): ConfigValidationResult { const errors: string[] = []; const warnings: string[] = [];   // Validate server configuration if (!this.config.server.name || this.config.server.name.trim() === '') { errors.push('Server name cannot be empty'); }   if (!this.config.server.version || this.config.server.version.trim() === '') { errors.push('Server version cannot be empty'); }   if (this.config.server.port < 1 || this.config.server.port > 65535) { errors.push('Server port must be between 1 and 65535'); }   if (!['error', 'warn', 'info', 'debug'].includes(this.config.server.logLevel)) { errors.push('Log level must be one of: error, warn, info, debug'); }   // Validate data configuration if (!this.config.data.dataPath || this.config.data.dataPath.trim() === '') { errors.push('Data path cannot be empty'); }   if (this.config.data.cacheTimeout < 0) { errors.push('Cache timeout cannot be negative'); }   if (this.config.data.maxCacheSize < 1) { errors.push('Max cache size must be at least 1 MB'); }   // Validate security configuration if (this.config.security.rateLimitRpm < 1) { errors.push('Rate limit must be at least 1 request per minute'); }   if (this.config.security.enableAuth && !this.config.security.apiKey) { warnings.push('Authentication is enabled but no API key is configured'); }   // Validate performance configuration if (this.config.performance.maxConcurrentRequests < 1) { errors.push('Max concurrent requests must be at least 1'); }   if (this.config.performance.requestTimeout < 1000) { warnings.push('Request timeout is very low (< 1 second), this may cause issues'); }   if (this.config.performance.memoryWarningThreshold < 64) { warnings.push('Memory warning threshold is very low (< 64 MB)'); }   return { valid: errors.length === 0, errors: errors.length > 0 ? errors : undefined, warnings: warnings.length > 0 ? warnings : undefined }; }   /** * Deep clone an object */ private deepClone<T>(obj: T): T { if (obj === null || typeof obj !== 'object') return obj; Iif (obj instanceof Date) return new Date(obj.getTime()) as any; if (Array.isArray(obj)) return obj.map(item => this.deepClone(item)) as any; const cloned = {} as T; for (const key in obj) { if (obj.hasOwnProperty(key)) { cloned[key] = this.deepClone(obj[key]); } } return cloned; }   /** * Deep merge two objects */ private deepMerge<T>(target: T, source: any): T { const result = this.deepClone(target); for (const key in source) { if (source.hasOwnProperty(key)) { if (source[key] && typeof source[key] === 'object' && !Array.isArray(source[key])) { (result as any)[key] = this.deepMerge((result as any)[key] || {}, source[key]); } else { (result as any)[key] = source[key]; } } } return result; } }   /** * Create and load configuration */ export async function loadConfiguration(configFilePath?: string): Promise<{ config: MCPServerConfiguration; validation: ConfigValidationResult; }> { const manager = new ConfigurationManager(configFilePath); const validation = await manager.loadConfiguration(); const config = manager.getConfiguration();   return { config, validation }; }   /** * Export default configuration for testing */ export { DEFAULT_CONFIG };</pre></td></tr></table></pre> <div class='push'></div> </div> <div class='footer quiet pad2 space-top1 center small'> Code coverage generated by <a href="https://istanbul.js.org/" target="_blank" rel="noopener noreferrer">istanbul</a> at 2025-07-23T16:11:28.719Z </div> <script src="../../prettify.js"></script> <script> window.onload = function () { prettyPrint(); }; </script> <script src="../../sorter.js"></script> <script src="../../block-navigation.js"></script> </body> </html>

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