autotel/dist/chunk-FU6R566Y.cjs.map

Write Once, Observe Anywhere

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* Zero-dependency structured logger for autotel\n *\n * This logger provides:\n * - Structured JSON logging (production) or pretty print (development)\n * - Auto trace context injection (traceId, spanId, correlationId)\n * - Dynamic log level control (per-request via OTel context)\n * - Level support (debug, info, warn, error, none)\n * - Zero additional dependencies (uses @opentelemetry/api, already a dep)\n *\n * Uses Pino-compatible signature supporting both patterns:\n * - `log.info('simple message')` - string-only\n * - `log.info({ userId: '123' }, 'message')` - object first with optional message\n *\n * Used as the default fallback when users don't provide Pino/Bunyan.\n * Can also be used directly: import { createBuiltinLogger } from 'autotel/logger'\n *\n * @example\n * ```typescript\n * import { createBuiltinLogger, runWithLogLevel } from 'autotel/logger';\n *\n * const log = createBuiltinLogger('my-service');\n *\n * // Simple message (no metadata)\n * log.info('Server started');\n *\n * // With metadata (Pino-style: object first, message second)\n * log.info({ userId: '123' }, 'User created');\n * // Output: {\"level\":\"info\",\"service\":\"my-service\",\"msg\":\"User created\",\"userId\":\"123\",\"traceId\":\"...\"}\n *\n * // Dynamic log level per-request\n * runWithLogLevel('debug', () => {\n *   log.debug('This will log even if default level is \"info\"');\n * });\n * ```\n */\n\nimport {\n  trace,\n  context as api_context,\n  createContextKey,\n} from '@opentelemetry/api';\nimport type { Logger } from './logger';\n\nexport type BuiltinLogLevel = 'debug' | 'info' | 'warn' | 'error' | 'none';\n\n/**\n * Context key for storing active log level (enables per-request log levels)\n */\nconst LOG_LEVEL_KEY = createContextKey('autotel-log-level');\n\n/**\n * Get the active log level from context (if set)\n * Falls back to undefined if no log level is set in context\n */\nexport function getActiveLogLevel(): BuiltinLogLevel | undefined {\n  return api_context.active().getValue(LOG_LEVEL_KEY) as\n    | BuiltinLogLevel\n    | undefined;\n}\n\n/**\n * Run a function with a specific log level\n * The log level is stored in OpenTelemetry context and applies to all logger calls within the callback\n *\n * @example\n * ```typescript\n * // Enable debug logging for a specific request\n * runWithLogLevel('debug', () => {\n *   log.debug('This will be logged');\n *   processRequest();\n * });\n *\n * // Disable logging temporarily\n * runWithLogLevel('none', () => {\n *   log.info('This will NOT be logged');\n * });\n * ```\n */\nexport function runWithLogLevel<T>(\n  level: BuiltinLogLevel,\n  callback: () => T,\n): T {\n  const ctx = api_context.active().setValue(LOG_LEVEL_KEY, level);\n  return api_context.with(ctx, callback);\n}\n\n/**\n * Get current trace context from active span\n * Returns null if no active span exists\n */\nfunction getTraceContextInternal(): {\n  traceId: string;\n  spanId: string;\n  correlationId: string;\n} | 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Default: false (JSON output) */\n  pretty?: boolean;\n}\n\n/**\n * Create a lightweight structured logger\n *\n * @param service - Service name for logging\n * @param options - Optional configuration\n *\n * @example\n * ```typescript\n * const log = createBuiltinLogger('user-service');\n *\n * log.info('Creating user', { email: 'test@example.com' });\n * // Output: {\"level\":\"info\",\"service\":\"user-service\",\"msg\":\"Creating user\",\n * //          \"email\":\"test@example.com\",\"traceId\":\"...\",\"spanId\":\"...\"}\n *\n * // Dynamic log level control per-request\n * runWithLogLevel('debug', () => {\n *   log.debug('This will be logged even if logger was created with level: \"info\"');\n * });\n * ```\n */\nexport function createBuiltinLogger(\n  service: string,\n  options?: BuiltinLoggerOptions,\n): Logger {\n  const defaultLevel = options?.level || 'info';\n  const pretty = options?.pretty || false;\n\n  const levelPriority: Record<BuiltinLogLevel, number> = {\n    none: -1,\n    debug: 0,\n    info: 1,\n    warn: 2,\n    error: 3,\n  };\n\n  const shouldLog = (level: BuiltinLogLevel): boolean => {\n    // Priority: context level > options level > 'info' default\n    const activeLevel = getActiveLogLevel() ?? defaultLevel;\n\n    // 'none' means suppress all logging\n    if (activeLevel === 'none') return false;\n\n    return levelPriority[level] >= levelPriority[activeLevel];\n  };\n\n  const log = (\n    level: 'info' | 'error' | 'warn' | 'debug',\n    msg: string,\n    attrs?: Record<string, unknown>,\n  ) => {\n    if (!shouldLog(level)) return;\n\n    const ctx = getTraceContextInternal();\n    const logEntry: Record<string, unknown> = {\n      level,\n      service,\n      msg,\n      ...attrs,\n      ...ctx, // Auto-inject traceId, spanId, correlationId\n      timestamp: new Date().toISOString(),\n    };\n\n    if (pretty) {\n      // Pretty print for development\n      const traceInfo = ctx\n        ? ` [${ctx.traceId.slice(0, 8)}.../${ctx.spanId.slice(0, 8)}...]`\n        : '';\n      console.log(\n        `[${level.toUpperCase()}]${traceInfo} ${service}: ${msg}`,\n        attrs || '',\n      );\n    } else {\n      // Structured JSON for production\n      console.log(JSON.stringify(logEntry));\n    }\n  };\n\n  // Pino-compatible signature: supports both:\n  // - logger.info('message') - string-only\n  // - logger.info({ extra }, 'message') - Pino style with metadata\n  // Also auto-detects and handles legacy Winston-style: logger.info('message', { extra })\n  const createLogMethod = (level: 'info' | 'warn' | 'debug') => {\n    return (\n      extraOrMessage: Record<string, unknown> | string,\n      message?: string | Record<string, unknown>,\n    ) => {\n      if (typeof extraOrMessage === 'string') {\n        // First arg is string - could be:\n        // 1. String-only: logger.info('message')\n        // 2. Legacy Winston-style: logger.info('message', { extra })\n        if (message !== undefined && typeof message === 'object') {\n          // Legacy Winston-style detected - auto-swap for backward compatibility\n          if (process.env.NODE_ENV !== 'production') {\n            console.warn(\n              `[autotel] Legacy logger pattern detected: logger.${level}('message', metadata). ` +\n                `Autotel recommends Pino signature: logger.${level}({ ...metadata }, 'message'). ` +\n                `Auto-swapping arguments for compatibility.`,\n            );\n          }\n          // Swap: treat first arg as message, second as metadata\n          log(level, extraOrMessage, message as Record<string, unknown>);\n        } else {\n          // Pure string-only call: logger.info('message')\n          log(level, extraOrMessage);\n        }\n      } else {\n        // Pino style: logger.info({ extra }, 'message')\n        log(level, (message as string) || '', extraOrMessage);\n      }\n    };\n  };\n\n  return {\n    info: createLogMethod('info'),\n    warn: createLogMethod('warn'),\n    debug: createLogMethod('debug'),\n\n    error: (\n      extraOrMessage: Record<string, unknown> | string,\n      message?: string | Record<string, unknown> | Error,\n    ) => {\n      if (typeof extraOrMessage === 'string') {\n        // First arg is string - could be:\n        // 1. String-only: logger.error('message')\n        // 2. Legacy: logger.error('message', error) - Error as second arg\n        // 3. Legacy: logger.error('message', { extra }) - object as second arg\n\n        // Handle legacy logger.error('message', error) pattern\n        if (message instanceof Error) {\n          if (process.env.NODE_ENV !== 'production') {\n            console.warn(\n              `[autotel] Legacy logger pattern detected: logger.error('message', error). ` +\n                `Autotel recommends Pino signature: logger.error({ err: error }, 'message'). ` +\n                `Auto-swapping arguments for compatibility.`,\n            );\n          }\n          log('error', extraOrMessage, {\n            error: message.message,\n            stack: message.stack,\n            name: message.name,\n          });\n          return;\n        }\n\n        // Handle legacy logger.error('message', { extra }) pattern\n        if (message !== undefined && typeof message === 'object') {\n          if (process.env.NODE_ENV !== 'production') {\n            console.warn(\n              `[autotel] Legacy logger pattern detected: logger.error('message', metadata). ` +\n                `Autotel recommends Pino signature: logger.error({ ...metadata }, 'message'). ` +\n                `Auto-swapping arguments for compatibility.`,\n            );\n          }\n          // Swap: treat first arg as message, second as metadata (handle err extraction)\n          const extra = message as Record<string, unknown>;\n          const { err, ...rest } = extra as Record<string, unknown> & {\n            err?: unknown;\n          };\n          let errorAttrs: Record<string, unknown> = rest;\n          if (err instanceof Error) {\n            errorAttrs = {\n              error: err.message,\n              stack: err.stack,\n              name: err.name,\n              ...rest,\n            };\n          } else if (err !== undefined) {\n            errorAttrs = { err, ...rest };\n          }\n          log('error', extraOrMessage, errorAttrs);\n          return;\n        }\n\n        // Pure string-only call: logger.error('message')\n        log('error', extraOrMessage);\n        return;\n      }\n\n      // Pino style: logger.error({ err, ...extra }, 'message')\n      // Extract err from extra if present (Pino convention)\n      const { err, ...rest } = extraOrMessage as Record<string, unknown> & {\n        err?: unknown;\n      };\n      let errorAttrs: Record<string, unknown> = rest;\n      if (err instanceof Error) {\n        // err is an Error - extract message, stack, name for structured logging\n        errorAttrs = {\n          error: err.message,\n          stack: err.stack,\n          name: err.name,\n          ...rest,\n        };\n      } else if (err !== undefined) {\n        // err is not an Error but exists - preserve it as-is\n        errorAttrs = {\n          err,\n          ...rest,\n        };\n      }\n      log('error', (message as string) || '', errorAttrs);\n    },\n  };\n}\n\n/**\n * Pino-like factory function for creating an autotel logger\n *\n * @example\n * ```typescript\n * import { autotelLogger } from 'autotel/logger';\n *\n * const log = autotelLogger();\n *\n * // Simple message\n * log.info('Server started');\n *\n * // With metadata (Pino-style: object first, message second)\n * log.info({ userId: '123' }, 'User created');\n *\n * // With options\n * const devLog = autotelLogger({ service: 'my-app', level: 'debug', pretty: true });\n * ```\n */\nexport function autotelLogger(options?: {\n  service?: string;\n  level?: BuiltinLogLevel;\n  pretty?: boolean;\n}): Logger {\n  return createBuiltinLogger(options?.service || 'app', {\n    level: options?.level,\n    pretty: options?.pretty,\n  });\n}\n","/**\n * Logger types and utilities for autotel\n *\n * **Zero-Config Option:** Don't provide a logger to `init()` and autotel uses\n * a built-in structured JSON logger with automatic trace context injection.\n *\n * **BYOL (Bring Your Own Logger):** Pass Pino or Bunyan to `init()` for\n * automatic instrumentation with trace context and OTLP log export.\n *\n * ## Logger Signature\n *\n * Autotel v2.10+ uses **Pino's signature**: `logger.info({ metadata }, 'message')`.\n *\n * ### Backward Compatibility\n *\n * The built-in logger auto-detects legacy Winston-style calls and swaps arguments:\n * ```typescript\n * // Legacy (auto-detected and handled)\n * logger.info('User created', { userId: '123' });\n * // → Internally treated as: logger.info({ userId: '123' }, 'User created')\n * // → Logs warning in development, works silently in production\n * ```\n *\n * ### Recommended Usage\n *\n * ```typescript\n * // ✅ Pino-style (preferred)\n * logger.info({ userId: '123' }, 'User created');\n *\n * // ✅ Simple message (no metadata)\n * logger.info('Server started');\n * ```\n *\n * **Note:** If you BYOL (bring your own logger), it must use Pino signature.\n * Winston and other `(message, meta)` loggers are NOT compatible.\n * For Winston, use `@opentelemetry/instrumentation-winston` instead.\n *\n * @example Zero-config (uses built-in logger)\n * ```typescript\n * import { init } from 'autotel';\n *\n * init({ service: 'my-app' });\n * // Internal logs: {\"level\":\"info\",\"service\":\"my-app\",\"msg\":\"...\",\"traceId\":\"...\"}\n * ```\n *\n * @example Using built-in logger directly\n * ```typescript\n * import { createBuiltinLogger, runWithLogLevel } from 'autotel/logger';\n *\n * const log = createBuiltinLogger('my-service');\n *\n * // Simple message (no metadata)\n * log.info('Server started');\n *\n * // With metadata (Pino-style: object first, message second)\n * log.info({ userId: '123' }, 'User created');\n * // Output: {\"level\":\"info\",\"service\":\"my-service\",\"msg\":\"User created\",\"userId\":\"123\",\"traceId\":\"...\"}\n *\n * // Dynamic log level per-request\n * runWithLogLevel('debug', () => {\n *   log.debug('Debug info for this request only');\n * });\n * ```\n *\n * @example Using Pino (recommended for production, auto-instrumented)\n * ```typescript\n * import pino from 'pino';  // npm install pino\n * import { init } from 'autotel';\n *\n * const logger = pino({ level: 'info' });\n * init({ service: 'my-app', logger });\n *\n * // Logs automatically include traceId/spanId and export via OTLP!\n * logger.info({ userId: '123' }, 'User created');\n * ```\n *\n * @example Using Bunyan (auto-instrumented, same signature as Pino)\n * ```typescript\n * import bunyan from 'bunyan';  // npm install bunyan @opentelemetry/instrumentation-bunyan\n * import { init } from 'autotel';\n * import { BunyanInstrumentation } from '@opentelemetry/instrumentation-bunyan';\n *\n * const logger = bunyan.createLogger({ name: 'my-app' });\n * init({\n *   service: 'my-app',\n *   logger,\n *   instrumentations: [new BunyanInstrumentation()]\n * });\n * ```\n *\n * @example Custom logger (MUST use Pino-compatible signature)\n * ```typescript\n * // ⚠️ Your custom logger MUST accept (object, message?) signature\n * const logger = {\n *   info: (extra, msg) => console.log(msg || '', extra),\n *   warn: (extra, msg) => console.warn(msg || '', extra),\n *   error: (extra, msg) => console.error(msg || '', extra),\n *   debug: (extra, msg) => console.debug(msg || '', extra),\n * };\n * init({ service: 'my-app', logger });\n * ```\n *\n * @example BYOL helper: inject trace context into any logger\n * ```typescript\n * import bunyan from 'bunyan';\n * import { getTraceContext } from 'autotel/logger';\n *\n * const bunyanLogger = bunyan.createLogger({ name: 'myapp' });\n * const ctx = getTraceContext();\n * bunyanLogger.info({ ...ctx, userId: '123' }, 'Creating user');\n * ```\n */\n\nimport { SpanStatusCode } from '@opentelemetry/api';\nimport { getConfig } from './config';\n\n// ============================================================================\n// Logger Types\n// ============================================================================\n\n/**\n * Log level constants\n */\nexport const LOG_LEVEL = {\n  DEBUG: 'debug',\n  INFO: 'info',\n  WARN: 'warn',\n  ERROR: 'error',\n} as const;\n\nexport type LogLevel = (typeof LOG_LEVEL)[keyof typeof LOG_LEVEL];\n\n/**\n * Logger configuration (for reference - not needed with BYOL approach)\n */\nexport interface LoggerConfig {\n  service: string;\n  level?: LogLevel;\n  pretty?: boolean;\n  redact?: string[] | false;\n}\n\n/**\n * Pino-compatible log function signature\n *\n * Matches Pino's actual LogFn type which supports:\n * - `(msg: string)` - simple string message\n * - `(obj: object, msg?: string)` - object first with optional message\n *\n * @example\n * ```typescript\n * logger.info('User logged in');\n * logger.info({ userId: '123' }, 'User created');\n * logger.error({ err: error }, 'Operation failed');\n * ```\n */\nexport interface LogFn {\n  (msg: string): void;\n  (obj: Record<string, unknown>, msg?: string): void;\n}\n\n/**\n * Simple logger interface - Pino/Bunyan-compatible\n *\n * Uses Pino's LogFn signature which supports both:\n * - `logger.info('message')` - simple string message\n * - `logger.info({ extra }, 'message')` - object first with optional message\n *\n * This is compatible with Pino, Bunyan, and any logger following this pattern.\n *\n * @example Using Pino (just works!)\n * ```typescript\n * import pino from 'pino';\n * const logger = pino({ level: 'info' });\n * init({ service: 'my-app', logger });\n * ```\n *\n * @example Direct usage\n * ```typescript\n * logger.info('Simple message');\n * logger.info({ userId: '123' }, 'User created');\n * logger.error({ err: error }, 'Operation failed');\n * ```\n */\nexport interface Logger {\n  info: LogFn;\n  warn: LogFn;\n  error: LogFn;\n  debug: LogFn;\n}\n\n/**\n * Alias for Logger interface (backwards compatibility)\n * @deprecated Use Logger instead\n */\nexport type ILogger = Logger;\n\n/**\n * Pino logger type - re-exported for convenience\n *\n * Note: This is a type-only export. To use Pino, install it as a peer dependency:\n * `npm install pino`\n */\nexport type { Logger as PinoLogger } from 'pino';\n\n// ============================================================================\n// LoggedOperation Decorator\n// ============================================================================\n\nexport interface LoggedOperationOptions {\n  /** Operation name for tracing (e.g., 'user.createUser') */\n  operationName: string;\n}\n\n/**\n * TS5+ Standard Decorator for logging and tracing operations\n * Uses TC39 Stage 3 decorator syntax\n *\n * This is the traditional per-method decorator approach.\n * For zero-boilerplate solution, see @Instrumented class decorator.\n *\n * @example\n * // Simple usage (Pino-style: object first, message second)\n * class OrderService {\n *   constructor(private readonly deps: { log: Logger }) {}\n *\n *   @LoggedOperation('order.create')\n *   async createOrder(data: CreateOrderData) {\n *     // ✅ Correct Pino-style logging\n *     this.deps.log.info({ orderId: data.id }, 'Creating order');\n *   }\n * }\n *\n * // Advanced usage (future-proof for options)\n * @LoggedOperation({ operationName: 'order.create' })\n * async createOrder(data: CreateOrderData) { }\n */\nexport function LoggedOperation(\n  operationNameOrOptions: string | LoggedOperationOptions,\n) {\n  const operationName =\n    typeof operationNameOrOptions === 'string'\n      ? operationNameOrOptions\n      : operationNameOrOptions.operationName;\n\n  return function <This, Args extends unknown[], Return>(\n    originalMethod: (this: This, ...args: Args) => Promise<Return>,\n    context: ClassMethodDecoratorContext<\n      This,\n      (this: This, ...args: Args) => Promise<Return>\n    >,\n  ) {\n    const methodName = String(context.name);\n\n    return async function (this: This, ...args: Args): Promise<Return> {\n      // eslint-disable-next-line @typescript-eslint/no-explicit-any\n      const log = (this as any).deps?.log;\n      const startTime = performance.now();\n\n      const config = getConfig();\n      const tracer = config.tracer;\n\n      return tracer.startActiveSpan(operationName, async (span) => {\n        try {\n          log?.info(\n            {\n              operation: operationName,\n              method: methodName,\n              args,\n            },\n            'Operation started',\n          );\n\n          const result = await originalMethod.apply(this, args);\n\n          const duration = performance.now() - startTime;\n          log?.info(\n            {\n              operation: operationName,\n              method: methodName,\n              duration,\n            },\n            'Operation completed',\n          );\n\n          span.setStatus({ code: SpanStatusCode.OK });\n          span.setAttributes({\n            'operation.name': operationName,\n            'operation.method': methodName,\n            'operation.duration': duration,\n            'operation.success': true,\n          });\n\n          return result;\n        } catch (error) {\n          const duration = performance.now() - startTime;\n          log?.error(\n            {\n              err: error instanceof Error ? error : undefined,\n              operation: operationName,\n              method: methodName,\n              duration,\n            },\n            'Operation failed',\n          );\n\n          span.setStatus({\n            code: SpanStatusCode.ERROR,\n            message: error instanceof Error ? error.message : 'Unknown error',\n          });\n          span.setAttributes({\n            'operation.name': operationName,\n            'operation.method': methodName,\n            'operation.duration': duration,\n            'operation.success': false,\n            'error.type':\n              error instanceof Error ? error.constructor.name : 'Unknown',\n          });\n\n          throw error;\n        } finally {\n          span.end();\n        }\n      });\n    };\n  };\n}\n\n// ============================================================================\n// Built-in Logger (re-exports)\n// ============================================================================\n\nexport {\n  autotelLogger,\n  createBuiltinLogger,\n  runWithLogLevel,\n  getTraceContext,\n  getActiveLogLevel,\n  type BuiltinLogLevel,\n  type BuiltinLoggerOptions,\n} from './autotel-logger';\n"]}