@eventmsg/transport-webble/dist/index.cjs.map

EventMsgV3 Web Bluetooth transport for browser-based communication with ESP32 devices

{"version":3,"file":"index.cjs","names":["NORDIC_UART_SERVICE: WebBLEServiceConfig","WEB_BLUETOOTH_ERROR_MAP: Record<string, WebBLEErrorCode>","WEB_BLUETOOTH_ERROR_MESSAGES: Record<\n  WebBLEErrorCode,\n  {\n    message: string;\n    solution: string;\n  }\n>","BaseTransport","ValidationError","SendError","chunks: Uint8Array[]","ConnectionError","DisconnectionError"],"sources":["../src/types/config.ts","../src/types/errors.ts","../src/webble-transport.ts"],"sourcesContent":["import type { TransportConfig } from \"@eventmsg/core\";\n\n/**\n * Web Bluetooth service configuration\n */\nexport interface WebBLEServiceConfig {\n  /**\n   * Service UUID (e.g., Nordic UART Service)\n   */\n  uuid: string;\n\n  /**\n   * TX characteristic UUID (device → browser, notification)\n   */\n  txCharacteristic: string;\n\n  /**\n   * RX characteristic UUID (browser → device, write)\n   */\n  rxCharacteristic: string;\n}\n\n/**\n * Connection behavior configuration\n */\nexport interface WebBLEConnectionConfig {\n  /**\n   * Connection timeout in milliseconds\n   * @default 10_000\n   */\n  timeout?: number;\n\n  /**\n   * Preferred MTU size in bytes\n   * @default auto-negotiate\n   */\n  mtu?: number;\n\n  /**\n   * Whether to cache device for reconnection\n   * @default true\n   */\n  persistDevice?: boolean;\n\n  /**\n   * Number of automatic reconnection attempts\n   * @default 3\n   */\n  reconnectAttempts?: number;\n\n  /**\n   * Delay between reconnection attempts in milliseconds\n   * @default 1_000\n   */\n  reconnectDelay?: number;\n}\n\n/**\n * Configuration for WebBLE transport extending base TransportConfig\n */\nexport interface WebBLETransportConfig extends TransportConfig {\n  /**\n   * BLE service configuration\n   */\n  service: WebBLEServiceConfig;\n\n  /**\n   * Optional device filtering for requestDevice()\n   */\n  filters?: BluetoothLEScanFilter[];\n\n  /**\n   * Connection behavior configuration\n   */\n  connection?: WebBLEConnectionConfig;\n}\n\n/**\n * Nordic UART Service preset configuration\n * Standard service used by most ESP32 BLE examples\n */\nexport const NORDIC_UART_SERVICE: WebBLEServiceConfig = {\n  uuid: \"6e400001-b5a3-f393-e0a9-e50e24dcca9e\",\n  txCharacteristic: \"6e400003-b5a3-f393-e0a9-e50e24dcca9e\", // notify\n  rxCharacteristic: \"6e400002-b5a3-f393-e0a9-e50e24dcca9e\", // write\n};\n\n/**\n * Create a WebBLE transport config with Nordic UART defaults\n */\nexport function createNordicUARTConfig(\n  localAddress: number,\n  groupAddress: number,\n  overrides?: Partial<WebBLETransportConfig>\n): WebBLETransportConfig {\n  return {\n    localAddress,\n    groupAddress,\n    service: NORDIC_UART_SERVICE,\n    connection: {\n      timeout: 10_000,\n      persistDevice: true,\n      reconnectAttempts: 3,\n      reconnectDelay: 1000,\n      mtu: 480,\n    },\n    ...overrides,\n  };\n}\n","/**\n * Web Bluetooth specific error codes\n */\nexport const WebBLEErrorCode = {\n  /** Browser doesn't support Web Bluetooth */\n  NOT_SUPPORTED: \"NOT_SUPPORTED\",\n\n  /** Not in secure context (HTTPS required) */\n  INSECURE_CONTEXT: \"INSECURE_CONTEXT\",\n\n  /** User cancelled device selection */\n  USER_CANCELLED: \"USER_CANCELLED\",\n\n  /** Device not found or not available */\n  DEVICE_NOT_FOUND: \"DEVICE_NOT_FOUND\",\n\n  /** Failed to connect to GATT server */\n  GATT_CONNECTION_FAILED: \"GATT_CONNECTION_FAILED\",\n\n  /** Service not found on device */\n  SERVICE_NOT_FOUND: \"SERVICE_NOT_FOUND\",\n\n  /** Characteristic not found in service */\n  CHARACTERISTIC_NOT_FOUND: \"CHARACTERISTIC_NOT_FOUND\",\n\n  /** Failed to start notifications */\n  NOTIFICATION_FAILED: \"NOTIFICATION_FAILED\",\n\n  /** BLE write operation failed */\n  WRITE_FAILED: \"WRITE_FAILED\",\n\n  /** Device disconnected unexpectedly */\n  UNEXPECTED_DISCONNECT: \"UNEXPECTED_DISCONNECT\",\n\n  /** Permission denied */\n  PERMISSION_DENIED: \"PERMISSION_DENIED\",\n\n  /** Operation timed out */\n  TIMEOUT: \"TIMEOUT\",\n} as const;\n\nexport type WebBLEErrorCode =\n  (typeof WebBLEErrorCode)[keyof typeof WebBLEErrorCode];\n\n/**\n * Mapping of Web Bluetooth DOMException names to WebBLE error codes\n */\nexport const WEB_BLUETOOTH_ERROR_MAP: Record<string, WebBLEErrorCode> = {\n  NotFoundError: WebBLEErrorCode.USER_CANCELLED,\n  SecurityError: WebBLEErrorCode.INSECURE_CONTEXT,\n  NotSupportedError: WebBLEErrorCode.NOT_SUPPORTED,\n  NetworkError: WebBLEErrorCode.UNEXPECTED_DISCONNECT,\n  TimeoutError: WebBLEErrorCode.TIMEOUT,\n  NotAllowedError: WebBLEErrorCode.PERMISSION_DENIED,\n};\n\n/**\n * User-friendly error messages with solutions\n */\nexport const WEB_BLUETOOTH_ERROR_MESSAGES: Record<\n  WebBLEErrorCode,\n  {\n    message: string;\n    solution: string;\n  }\n> = {\n  [WebBLEErrorCode.NOT_SUPPORTED]: {\n    message: \"Web Bluetooth is not supported in this browser\",\n    solution: \"Use Chrome, Edge, or Opera browser with Web Bluetooth support\",\n  },\n  [WebBLEErrorCode.INSECURE_CONTEXT]: {\n    message: \"Web Bluetooth requires a secure context (HTTPS)\",\n    solution: \"Use HTTPS or localhost for development\",\n  },\n  [WebBLEErrorCode.USER_CANCELLED]: {\n    message: \"Device selection was cancelled\",\n    solution: \"Please select a device from the list to continue\",\n  },\n  [WebBLEErrorCode.DEVICE_NOT_FOUND]: {\n    message: \"Bluetooth device not found or not available\",\n    solution: \"Ensure device is powered on, in range, and advertising\",\n  },\n  [WebBLEErrorCode.GATT_CONNECTION_FAILED]: {\n    message: \"Failed to connect to device GATT server\",\n    solution: \"Check device is available and try again\",\n  },\n  [WebBLEErrorCode.SERVICE_NOT_FOUND]: {\n    message: \"Required service not found on device\",\n    solution: \"Verify device firmware supports the required service\",\n  },\n  [WebBLEErrorCode.CHARACTERISTIC_NOT_FOUND]: {\n    message: \"Required characteristic not found in service\",\n    solution: \"Check device firmware implements the required characteristics\",\n  },\n  [WebBLEErrorCode.NOTIFICATION_FAILED]: {\n    message: \"Failed to enable notifications on characteristic\",\n    solution: \"Verify characteristic supports notifications\",\n  },\n  [WebBLEErrorCode.WRITE_FAILED]: {\n    message: \"Failed to write data to characteristic\",\n    solution: \"Check connection and characteristic write permissions\",\n  },\n  [WebBLEErrorCode.UNEXPECTED_DISCONNECT]: {\n    message: \"Device disconnected unexpectedly\",\n    solution: \"Check device power and Bluetooth range\",\n  },\n  [WebBLEErrorCode.PERMISSION_DENIED]: {\n    message: \"Bluetooth permission denied\",\n    solution: \"Allow Bluetooth access in browser settings\",\n  },\n  [WebBLEErrorCode.TIMEOUT]: {\n    message: \"Operation timed out\",\n    solution: \"Check device availability and try again\",\n  },\n};\n","import {\n  BaseTransport,\n  ConnectionError,\n  DisconnectionError,\n  getLogger,\n  SendError,\n  ValidationError,\n} from \"@eventmsg/core\";\nimport type { WebBLETransportConfig } from \"./types/index.js\";\nimport {\n  WEB_BLUETOOTH_ERROR_MAP,\n  WEB_BLUETOOTH_ERROR_MESSAGES,\n} from \"./types/index.js\";\n\n// UUID validation regex\nconst UUID_REGEX =\n  /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i;\n\n/**\n * WebBLE Transport for EventMsgV3 protocol\n *\n * Provides Web Bluetooth connectivity for browser-based communication\n * with ESP32 devices using BLE/GATT protocol.\n *\n * Features:\n * - Nordic UART Service support by default\n * - Automatic data chunking for BLE MTU limitations\n * - Device caching and automatic reconnection\n * - Browser compatibility checks\n * - Comprehensive error handling\n */\nexport class WebBLETransport extends BaseTransport<\n  WebBLETransportConfig,\n  BluetoothDevice\n> {\n  private readonly logger = getLogger(\"TRANSPORT_WEBBLE\");\n  private server: BluetoothRemoteGATTServer | undefined;\n  private service: BluetoothRemoteGATTService | undefined;\n  private rxCharacteristic: BluetoothRemoteGATTCharacteristic | undefined;\n  private txCharacteristic: BluetoothRemoteGATTCharacteristic | undefined;\n\n  private mtu = 480;\n  private deviceCache: string | null = null;\n\n  private receiveBuffer = new Uint8Array(0);\n  private readonly MAX_MESSAGE_SIZE = 4096;\n  private bufferTimeout?: NodeJS.Timeout | undefined;\n\n  constructor(config: WebBLETransportConfig) {\n    super(config);\n\n    this.checkBrowserSupport();\n    this.config.connection = {\n      timeout: 10_000,\n      persistDevice: true,\n      reconnectAttempts: 3,\n      reconnectDelay: 1000,\n      ...this.config.connection,\n    };\n  }\n\n  /**\n   * Check if Web Bluetooth is supported in current browser\n   * @throws {ValidationError} If Web Bluetooth is not supported\n   */\n  private checkBrowserSupport(): void {\n    if (!(\"bluetooth\" in navigator)) {\n      throw new ValidationError(\n        \"Web Bluetooth API not supported in this browser\",\n        {\n          context: {\n            ...this.getErrorContext(\"browser_check\"),\n            solution:\n              \"Use Chrome, Edge, or Opera browser with Web Bluetooth support\",\n          },\n        }\n      );\n    }\n\n    if (!window.isSecureContext) {\n      throw new ValidationError(\n        \"Web Bluetooth requires a secure context (HTTPS)\",\n        {\n          context: {\n            ...this.getErrorContext(\"browser_check\"),\n            solution: \"Use HTTPS or localhost for development\",\n          },\n        }\n      );\n    }\n  }\n\n  /**\n   * Validate WebBLE-specific configuration\n   * @param config Configuration to validate\n   * @throws {ValidationError} If configuration is invalid\n   */\n  protected validateConfig(config: WebBLETransportConfig): void {\n    // Call parent validation for base config\n    super.validateConfig(config);\n\n    // Validate service configuration\n    if (!config.service) {\n      throw new ValidationError(\"Service configuration is required\", {\n        context: this.getErrorContext(\"config_validation\"),\n      });\n    }\n\n    if (!config.service.uuid) {\n      throw new ValidationError(\"Service UUID is required\", {\n        context: this.getErrorContext(\"config_validation\"),\n      });\n    }\n\n    if (!config.service.txCharacteristic) {\n      throw new ValidationError(\"TX characteristic UUID is required\", {\n        context: this.getErrorContext(\"config_validation\"),\n      });\n    }\n\n    if (!config.service.rxCharacteristic) {\n      throw new ValidationError(\"RX characteristic UUID is required\", {\n        context: this.getErrorContext(\"config_validation\"),\n      });\n    }\n\n    // Validate UUIDs format (basic check)\n    if (!UUID_REGEX.test(config.service.uuid)) {\n      throw new ValidationError(\"Invalid service UUID format\", {\n        context: {\n          ...this.getErrorContext(\"config_validation\"),\n          serviceUuid: config.service.uuid,\n        },\n      });\n    }\n\n    if (!UUID_REGEX.test(config.service.txCharacteristic)) {\n      throw new ValidationError(\"Invalid TX characteristic UUID format\", {\n        context: {\n          ...this.getErrorContext(\"config_validation\"),\n          txCharacteristic: config.service.txCharacteristic,\n        },\n      });\n    }\n\n    if (!UUID_REGEX.test(config.service.rxCharacteristic)) {\n      throw new ValidationError(\"Invalid RX characteristic UUID format\", {\n        context: {\n          ...this.getErrorContext(\"config_validation\"),\n          rxCharacteristic: config.service.rxCharacteristic,\n        },\n      });\n    }\n  }\n\n  /**\n   * Transport-specific connection implementation\n   * Handles Web Bluetooth device selection and GATT connection\n   */\n  protected async doConnect(): Promise<void> {\n    try {\n      this.device = await this.getOrRequestDevice();\n      if (!this.device.gatt) {\n        throw new Error(\"Device does not support GATT\");\n      }\n\n      this.server = await this.device.gatt.connect();\n      this.service = await this.server.getPrimaryService(\n        this.config.service.uuid\n      );\n      this.rxCharacteristic = await this.service.getCharacteristic(\n        this.config.service.rxCharacteristic\n      );\n      this.txCharacteristic = await this.service.getCharacteristic(\n        this.config.service.txCharacteristic\n      );\n      await this.txCharacteristic.startNotifications();\n      this.txCharacteristic.addEventListener(\n        \"characteristicvaluechanged\",\n        this.handleIncomingData.bind(this)\n      );\n      this.device.addEventListener(\n        \"gattserverdisconnected\",\n        this.handleGATTDisconnect.bind(this)\n      );\n\n      this.negotiateMTU();\n      if (this.config.connection?.persistDevice) {\n        this.cacheDevice();\n      }\n      this.logger.info(\"WebBLE connected successfully\", {\n        deviceName: this.device?.name || \"Unknown\",\n        deviceId: this.device?.id,\n        mtu: this.mtu,\n        serviceUuid: this.config.service.uuid,\n        rxCharacteristic: this.config.service.rxCharacteristic,\n        txCharacteristic: this.config.service.txCharacteristic,\n      });\n    } catch (error) {\n      await this.cleanupConnection();\n      throw this.wrapBLEError(error, \"connection\");\n    }\n  }\n\n  /**\n   * Transport-specific disconnection implementation\n   * Cleans up BLE resources and disconnects\n   */\n  protected async doDisconnect(): Promise<void> {\n    try {\n      this.logger.info(\"WebBLE disconnecting\", {\n        deviceName: this.device?.name || \"Unknown\",\n        connected: this.server?.connected,\n      });\n      await this.cleanupConnection();\n      this.logger.info(\"WebBLE disconnected successfully\");\n    } catch (error) {\n      throw this.wrapBLEError(error, \"disconnection\");\n    }\n  }\n\n  /**\n   * Transport-specific send implementation\n   * Sends data via BLE characteristic with automatic chunking\n   */\n  protected async doSend(data: Uint8Array): Promise<void> {\n    if (!this.rxCharacteristic) {\n      throw new SendError(\"RX characteristic not available\", {\n        context: this.getErrorContext(\"send\"),\n      });\n    }\n\n    try {\n      // Chunk data for BLE MTU limitations\n      const chunks = this.chunkData(data);\n\n      this.logger.debug(\"Sending message via WebBLE\", {\n        totalSize: data.length,\n        chunkCount: chunks.length,\n        mtu: this.mtu,\n      });\n\n      // Send chunks sequentially (required for BLE reliability)\n      // Note: BLE often requires sequential sending for proper ordering\n      for (const chunk of chunks) {\n        await this.sendChunk(chunk);\n      }\n\n      this.logger.debug(\"Message sent successfully\", {\n        totalSize: data.length,\n        chunksSent: chunks.length,\n      });\n    } catch (error) {\n      throw this.wrapBLEError(error, \"send\");\n    }\n  }\n\n  /**\n   * Get cached device or request new device from user\n   */\n  private getOrRequestDevice(): Promise<BluetoothDevice> {\n    // Try cached device first\n    if (this.config.connection?.persistDevice && this.deviceCache) {\n      // TODO: Implement device cache retrieval\n      // This would require storing device ID and attempting reconnection\n      // For now, just clear cache and request new device\n      this.deviceCache = null;\n    }\n\n    // Request new device from user\n    return this.requestDevice();\n  }\n\n  /**\n   * Request device selection from user\n   */\n  private async requestDevice(): Promise<BluetoothDevice> {\n    const filters = this.config.filters || [\n      { services: [this.config.service.uuid] },\n    ];\n\n    try {\n      const device = await navigator.bluetooth.requestDevice({\n        filters,\n        optionalServices: [this.config.service.uuid],\n      });\n\n      return device;\n    } catch (error) {\n      throw this.wrapBLEError(error, \"device_request\");\n    }\n  }\n\n  /**\n   * Handle incoming data from BLE characteristic\n   */\n  private handleIncomingData(event: Event): void {\n    const characteristic = event.target as BluetoothRemoteGATTCharacteristic;\n    const value = characteristic.value;\n\n    if (!value) {\n      return;\n    }\n\n    // Convert DataView to Uint8Array\n    const chunk = new Uint8Array(value.buffer);\n\n    this.logger.debug(\"WebBLE chunk received\", {\n      chunkSize: chunk.length,\n      currentBufferSize: this.receiveBuffer.length,\n      newBufferSize: this.receiveBuffer.length + chunk.length,\n    });\n\n    // Simple concatenation\n    const newBuffer = new Uint8Array(this.receiveBuffer.length + chunk.length);\n    newBuffer.set(this.receiveBuffer);\n    newBuffer.set(chunk, this.receiveBuffer.length);\n    this.receiveBuffer = newBuffer;\n\n    // Safety check for malformed data\n    if (this.receiveBuffer.length > this.MAX_MESSAGE_SIZE) {\n      this.logger.warn(\"Message too large, clearing buffer\", {\n        bufferSize: this.receiveBuffer.length,\n        maxSize: this.MAX_MESSAGE_SIZE,\n        chunkSize: chunk.length,\n      });\n      this.clearReceiveBuffer();\n      return;\n    }\n\n    // Reset timeout on each chunk\n    this.resetBufferTimeout();\n\n    // Check if we have a complete message (starts with SOH, ends with EOT)\n    if (\n      this.receiveBuffer.length >= 10 && // Minimum valid message size\n      this.receiveBuffer[0] === 0x01 && // SOH\n      this.receiveBuffer.at(-1) === 0x04\n    ) {\n      // EOT\n\n      this.logger.info(\"Message reassembled successfully\", {\n        finalSize: this.receiveBuffer.length,\n        chunksReceived:\n          this.receiveBuffer.length <= 500\n            ? 1\n            : Math.ceil(this.receiveBuffer.length / 500),\n      });\n\n      // Emit complete message\n      this.emit(\"data\", this.receiveBuffer);\n\n      // Clear buffer for next message\n      this.clearReceiveBuffer();\n    } else {\n      // Set timeout to clear stale buffer after 5 seconds\n      this.bufferTimeout = setTimeout(() => {\n        if (this.receiveBuffer.length > 0) {\n          this.logger.warn(\"Partial message timeout, clearing buffer\", {\n            bufferSize: this.receiveBuffer.length,\n            timeoutMs: 5000,\n            hasSOH: this.receiveBuffer[0] === 0x01,\n            hasEOT: this.receiveBuffer.at(-1) === 0x04,\n          });\n          this.clearReceiveBuffer();\n        }\n      }, 5000);\n    }\n  }\n\n  /**\n   * Clear receive buffer and timeout\n   */\n  private clearReceiveBuffer(): void {\n    this.receiveBuffer = new Uint8Array(0);\n    this.resetBufferTimeout();\n  }\n\n  /**\n   * Reset buffer timeout\n   */\n  private resetBufferTimeout(): void {\n    if (this.bufferTimeout) {\n      clearTimeout(this.bufferTimeout);\n      this.bufferTimeout = undefined;\n    }\n  }\n\n  /**\n   * Handle GATT server disconnection event\n   */\n  private handleGATTDisconnect(_event: Event): void {\n    this.handleUnexpectedDisconnect();\n  }\n\n  /**\n   * Negotiate MTU size with device\n   */\n  private negotiateMTU(): void {\n    // Web Bluetooth doesn't provide direct MTU negotiation\n    // Use conservative default for now\n    this.mtu = this.config.connection?.mtu || 20;\n  }\n\n  /**\n   * Cache device for reconnection\n   */\n  private cacheDevice(): void {\n    if (this.device) {\n      this.deviceCache = this.device.id;\n    }\n  }\n\n  /**\n   * Split data into chunks that fit within BLE MTU\n   */\n  private chunkData(data: Uint8Array): Uint8Array[] {\n    const chunkSize = this.mtu;\n    const chunks: Uint8Array[] = [];\n\n    for (let i = 0; i < data.length; i += chunkSize) {\n      chunks.push(data.slice(i, i + chunkSize));\n    }\n\n    return chunks;\n  }\n\n  /**\n   * Send a single data chunk\n   */\n  private async sendChunk(chunk: Uint8Array): Promise<void> {\n    if (!this.rxCharacteristic) {\n      throw new Error(\"RX characteristic not available\");\n    }\n\n    try {\n      await this.rxCharacteristic.writeValueWithResponse(chunk as BufferSource);\n    } catch (error) {\n      this.logger.error(\"BLE chunk send failed\", {\n        error: error instanceof Error ? error.message : String(error),\n        chunkSize: chunk.length,\n        cause: error instanceof Error ? error.name : \"Unknown\",\n      });\n      throw error; // Throw original error\n    }\n  }\n\n  /**\n   * Clean up BLE connection resources\n   */\n  private async cleanupConnection(): Promise<void> {\n    // Clear receive buffer and timeout\n    this.clearReceiveBuffer();\n\n    // Stop notifications\n    if (this.txCharacteristic) {\n      try {\n        await this.txCharacteristic.stopNotifications();\n      } catch {\n        // Ignore errors during cleanup\n      }\n      this.txCharacteristic = undefined;\n    }\n\n    // Clear characteristics\n    this.rxCharacteristic = undefined;\n    this.service = undefined;\n\n    // Disconnect GATT server\n    if (this.server?.connected) {\n      this.server.disconnect();\n    }\n    this.server = undefined;\n\n    this.device = null;\n  }\n\n  /**\n   * Convert Web Bluetooth errors to transport errors\n   */\n  private wrapBLEError(error: unknown, operation: string): Error {\n    if (error instanceof Error) {\n      // Map known Web Bluetooth errors\n      const bleErrorCode = WEB_BLUETOOTH_ERROR_MAP[error.name];\n\n      if (bleErrorCode) {\n        const errorInfo = WEB_BLUETOOTH_ERROR_MESSAGES[bleErrorCode];\n\n        // Choose appropriate transport error type\n        if (operation === \"connection\") {\n          return new ConnectionError(errorInfo.message, {\n            cause: error,\n            context: {\n              ...this.getErrorContext(operation),\n              solution: errorInfo.solution,\n            },\n          });\n        }\n        if (operation === \"disconnection\") {\n          return new DisconnectionError(errorInfo.message, {\n            cause: error,\n            context: {\n              ...this.getErrorContext(operation),\n              solution: errorInfo.solution,\n            },\n          });\n        }\n        return new SendError(errorInfo.message, {\n          cause: error,\n          context: {\n            ...this.getErrorContext(operation),\n            solution: errorInfo.solution,\n          },\n        });\n      }\n    }\n\n    // Fallback for unknown errors\n    const message = error instanceof Error ? error.message : String(error);\n    return new ConnectionError(`BLE ${operation} failed: ${message}`, {\n      cause: error instanceof Error ? error : new Error(String(error)),\n      context: this.getErrorContext(operation),\n    });\n  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