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{ USBDeviceFound, USBRequestDeviceOptions, ParseUSBDevice, USBConfiguration, USBInterface, USBDirection, USBInTransferResult, USBOutTransferResult, USBTransferStatus, USBControlTransferParameters } from \"./USBTypes.js\";\r\n\r\ntype DotNetReferenceType = {\r\n  invokeMethod<T>(methodIdentifier: string, ...args: any[]): T,\r\n  invokeMethodAsync<T>(methodIdentifier: string, ...args: any[]): Promise<T>\r\n}\r\n\r\nexport class USBManager {\r\n  private usb: any = (<any>navigator).usb; // The WebUSB API root object\r\n  private _usbReference: DotNetReferenceType | undefined = undefined;\r\n  // All devices found on the last request\r\n  // We keep a list of the most recent object because we can't serialize the \"real\" USBDevice to send back to C#\r\n  // TODO: Find a better way to maintain it and keep consistent with the C# side...\r\n  private _foundDevices: any[] = [];\r\n  private _eventsRegistered: boolean = false;\r\n\r\n  public GetDevices = async (): Promise<USBDeviceFound[]> => {\r\n    let devices = await this.usb.getDevices();\r\n    let found: USBDeviceFound[] = [];\r\n    if (devices) {\r\n      devices.forEach(d => {\r\n        found.push(ParseUSBDevice(d));\r\n        this._foundDevices.push(d);\r\n      });\r\n    }\r\n    return found;\r\n  }\r\n\r\n  public RequestDevice = async (options: USBRequestDeviceOptions): Promise<USBDeviceFound> => {\r\n    function isEmpty(obj) {\r\n      for (var prop in obj) {\r\n        if (Object.prototype.hasOwnProperty.call(obj, prop)) {\r\n          return false;\r\n        }\r\n      }\r\n      return true;\r\n    }\r\n\r\n    let filters: any[] = [];\r\n    let reqOptions: any = undefined;\r\n\r\n    if (options && options != null && options.filters && options.filters != null && options.filters.length > 0) {\r\n      options.filters.forEach(f => {\r\n        let filter: any = {};\r\n        Object.keys(f).forEach(key => {\r\n          if (f[key] != null) {\r\n            filter[key] = f[key];\r\n          }\r\n        });\r\n        if (!isEmpty(filter)) {\r\n          filters.push(filter);\r\n        }\r\n      });\r\n\r\n      if (filters.length > 0) {\r\n        reqOptions = { filters: filters };\r\n      }\r\n    } else {\r\n      reqOptions = { filters: [] };\r\n    }\r\n\r\n    let authorizedDevice = await this.usb.requestDevice(reqOptions);\r\n    let usbDevice = ParseUSBDevice(authorizedDevice);\r\n    this._foundDevices.push(authorizedDevice);\r\n    return usbDevice;\r\n  }\r\n\r\n  public OpenDevice = (device: USBDeviceFound): Promise<USBDeviceFound> => {\r\n    let usbDevice = this.GetUSBDevice(device);\r\n    return new Promise<USBDeviceFound>((resolve, reject) => {\r\n      if (!usbDevice) return reject(\"Device not connected\");\r\n      usbDevice.open()\r\n        .then(() => {\r\n          let parsed = ParseUSBDevice(usbDevice);\r\n          console.log(parsed);\r\n          resolve(parsed);\r\n        })\r\n        .catch(err => reject(err));\r\n    });\r\n  }\r\n\r\n  public CloseDevice = (device: USBDeviceFound): Promise<USBDeviceFound> => {\r\n    let usbDevice = this.GetUSBDevice(device);\r\n    return new Promise<USBDeviceFound>((resolve, reject) => {\r\n      if (!usbDevice) return reject(\"Device not connected\");\r\n      usbDevice.close()\r\n        .then(() => {\r\n          resolve(ParseUSBDevice(usbDevice));\r\n        })\r\n        .catch(err => reject(err));\r\n    });\r\n  }\r\n\r\n  public ResetDevice = (device: USBDeviceFound): Promise<USBDeviceFound> => {\r\n    let usbDevice = this.GetUSBDevice(device);\r\n    return new Promise<USBDeviceFound>((resolve, reject) => {\r\n      if (!usbDevice) return reject(\"Device not connected\");\r\n      usbDevice.reset()\r\n        .then(() => {\r\n          resolve(ParseUSBDevice(usbDevice));\r\n        })\r\n        .catch(err => reject(err));\r\n    });\r\n  }\r\n\r\n  public SelectConfiguration = (device: USBDeviceFound, configurationValue: number): Promise<USBDeviceFound> => {\r\n    let usbDevice = this.GetUSBDevice(device);\r\n    return new Promise<USBDeviceFound>((resolve, reject) => {\r\n      if (!usbDevice) return reject(\"Device not connected\");\r\n      console.log(configurationValue);\r\n      usbDevice.selectConfiguration(configurationValue)\r\n        .then(() => {\r\n          resolve(ParseUSBDevice(usbDevice));\r\n        })\r\n        .catch(err => reject(err));\r\n    });\r\n  }\r\n\r\n  public ClaimInterface = (device: USBDeviceFound, interfaceNumber: number): Promise<USBDeviceFound> => {\r\n    let usbDevice = this.GetUSBDevice(device);\r\n    return new Promise<USBDeviceFound>((resolve, reject) => {\r\n      if (!usbDevice) return reject(\"Device not connected\");\r\n\r\n      usbDevice.claimInterface(interfaceNumber)\r\n        .then(() => {\r\n          resolve(ParseUSBDevice(usbDevice));\r\n        })\r\n        .catch(err => reject(err));\r\n    });\r\n  }\r\n\r\n  public ReleaseInterface = (device: USBDeviceFound, interfaceNumber: number): Promise<USBDeviceFound> => {\r\n    let usbDevice = this.GetUSBDevice(device);\r\n    return new Promise<USBDeviceFound>((resolve, reject) => {\r\n      if (!usbDevice) return reject(\"Device not connected\");\r\n\r\n      usbDevice.releaseInterface(interfaceNumber)\r\n        .then(() => {\r\n          resolve(ParseUSBDevice(usbDevice));\r\n        })\r\n        .catch(err => reject(err));\r\n    });\r\n  }\r\n\r\n  public SelectAlternateInterface = (device: USBDeviceFound, interfaceNumber: number, alternateSetting: number): Promise<USBDeviceFound> => {\r\n    let usbDevice = this.GetUSBDevice(device);\r\n    return new Promise<USBDeviceFound>((resolve, reject) => {\r\n      if (!usbDevice) return reject(\"Device not connected\");\r\n\r\n      usbDevice.selectAlternateInterface(interfaceNumber, alternateSetting)\r\n        .then(() => {\r\n          resolve(ParseUSBDevice(usbDevice));\r\n        })\r\n        .catch(err => reject(err));\r\n    });\r\n  }\r\n\r\n  public ClearHalt = (device: USBDeviceFound, direction: USBDirection, endpointNumber: number): Promise<USBDeviceFound> => {\r\n    let usbDevice = this.GetUSBDevice(device);\r\n    return new Promise<USBDeviceFound>((resolve, reject) => {\r\n      if (!usbDevice) return reject(\"Device not connected\");\r\n\r\n      usbDevice.clearHalt(direction, endpointNumber)\r\n        .then(() => {\r\n          resolve(ParseUSBDevice(usbDevice));\r\n        })\r\n        .catch(err => reject(err));\r\n    });\r\n  }\r\n\r\n  public TransferIn = (device: USBDeviceFound, endpointNumber: number, length: number): Promise<USBInTransferResult> => {\r\n    let usbDevice = this.GetUSBDevice(device);\r\n    return new Promise<USBInTransferResult>((resolve, reject) => {\r\n      if (!usbDevice) return reject(\"Device not connected\");\r\n\r\n      usbDevice.transferIn(endpointNumber, length)\r\n        .then(out => {\r\n          resolve({\r\n            data: this.BufferToBase64(Array.prototype.slice.call(new Uint8Array(out.data.buffer))), // Hack to support Uint8Array to byte[] serialization.\r\n            status: out.status\r\n          });\r\n        })\r\n        .catch(err => {\r\n          console.error(err);\r\n          reject(err);\r\n        });\r\n    });\r\n  }\r\n\r\n  public TransferOut = (device: USBDeviceFound, endpointNumber: number, data: string): Promise<USBOutTransferResult> => {\r\n    let usbDevice = this.GetUSBDevice(device);\r\n    return new Promise<USBOutTransferResult>((resolve, reject) => {\r\n      if (!usbDevice) return reject(\"Device not connected\");\r\n      const buffer = this.Base64ToBuffer(data);\r\n\r\n      usbDevice.transferOut(endpointNumber, buffer)\r\n        .then(out => {\r\n          resolve({\r\n            bytesWritten: out.bytesWritten,\r\n            status: out.status\r\n          });\r\n        })\r\n        .catch(err => {\r\n          console.error(err);\r\n          reject(err);\r\n        });\r\n    });\r\n  }\r\n\r\n  public ControlTransferIn = (device: USBDeviceFound, setup: USBControlTransferParameters, length: number): Promise<USBInTransferResult> => {\r\n    let usbDevice = this.GetUSBDevice(device);\r\n    return new Promise<USBInTransferResult>((resolve, reject) => {\r\n      if (!usbDevice) return reject(\"Device not connected\");\r\n\r\n      usbDevice.ControlTransferIn(setup, length)\r\n        .then(out => {\r\n          resolve({\r\n            data: this.BufferToBase64(Array.prototype.slice.call(new Uint8Array(out.data.buffer))), // Hack to support Uint8Array to byte[] serialization.\r\n            status: out.status\r\n          });\r\n        })\r\n        .catch(err => {\r\n          console.error(err);\r\n          reject(err);\r\n        });\r\n    });\r\n  }\r\n\r\n  public ControlTransferOut = (device: USBDeviceFound, setup: USBControlTransferParameters, data: string): Promise<USBOutTransferResult> => {\r\n    let usbDevice = this.GetUSBDevice(device);\r\n    return new Promise<USBOutTransferResult>((resolve, reject) => {\r\n      if (!usbDevice) return reject(\"Device not connected\");\r\n      const buffer = this.Base64ToBuffer(data);\r\n\r\n      usbDevice.controlTransferOut(setup, buffer)\r\n        .then(out => {\r\n          console.log(out);\r\n          resolve({\r\n            bytesWritten: out.bytesWritten,\r\n            status: out.status\r\n          });\r\n        })\r\n        .catch(err => {\r\n          console.error(err);\r\n          reject(err);\r\n        });\r\n    });\r\n  }\r\n\r\n  private GetUSBDevice = (device: USBDeviceFound): any => {\r\n    return this._foundDevices.find(\r\n      d => d.vendorId == device.vendorId &&\r\n        d.productId == device.productId &&\r\n        d.deviceClass == device.deviceClass &&\r\n        d.serialNumber == device.serialNumber);\r\n  }\r\n\r\n  private ConnectionStateChangedCallback = (event: any) => {\r\n    if (!this._usbReference) return;\r\n    let method: string = \"\";\r\n\r\n    let usbDevice = this.GetUSBDevice(event.device);\r\n\r\n    if (event.type == \"disconnect\") {\r\n      method = \"OnDisconnect\";\r\n      this._foundDevices = this._foundDevices.filter((d, index, arr) => {\r\n        return d.vendorId != usbDevice.vendorId &&\r\n          d.productId != usbDevice.productId &&\r\n          d.deviceClass != usbDevice.deviceClass &&\r\n          d.serialNumber != usbDevice.serialNumber;\r\n      });\r\n    }\r\n    else if (event.type == \"connect\") {\r\n      method = \"OnConnect\";\r\n    }\r\n    else {\r\n      console.warn(event);\r\n      return;\r\n    }\r\n\r\n    this._usbReference.invokeMethodAsync(method, ParseUSBDevice(event.device));\r\n  }\r\n\r\n  public RegisterUSBEvents = (usb: DotNetReferenceType) => {\r\n    this._usbReference = usb;\r\n    //TODO: Check why this event is not consistently being fired.\r\n    if (!this._eventsRegistered) {\r\n      this.usb.addEventListener(\"connect\", this.ConnectionStateChangedCallback);\r\n      this.usb.addEventListener(\"disconnect\", this.ConnectionStateChangedCallback);\r\n      this._eventsRegistered = true;\r\n    }\r\n  }\r\n\r\n  public RemoveUSBEvents = (usb: DotNetReferenceType) => {\r\n    if (this._eventsRegistered) {\r\n      this.usb.removeEventListener(\"connect\", this.ConnectionStateChangedCallback);\r\n      this.usb.removeEventListener(\"disconnect\", this.ConnectionStateChangedCallback);\r\n    }\r\n  }\r\n\r\n  private BufferToBase64 = (buf) => {\r\n    var binstr = Array.prototype.map.call(buf, (ch) => {\r\n      return String.fromCharCode(ch);\r\n    }).join('');\r\n    return btoa(binstr);\r\n  }\r\n\r\n  private Base64ToBuffer = (base64: string) => {\r\n    var binstr = atob(base64);\r\n    var buf = new Uint8Array(binstr.length);\r\n    Array.prototype.forEach.call(binstr, (ch, i) => {\r\n      buf[i] = ch.charCodeAt(0);\r\n    });\r\n    return buf;\r\n  }\r\n}\r\n"]}