269 lines
8.8 KiB
Plaintext
269 lines
8.8 KiB
Plaintext
import type { BleService, BleCharacteristic, BleDataReceivedCallback, BleCharacteristicProperties, WriteCharacteristicOptions, AutoDiscoverAllResult } from '../interface.uts';
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import type { BleDevice } from '../interface.uts';
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import { DeviceManager } from './device_manager.uts';
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declare const wx: any;
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type PendingRead = {
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resolve: (data: ArrayBuffer) => void;
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reject: (err?: any) => void;
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timer?: number;
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};
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function toUint8Array(buffer: ArrayBuffer): Uint8Array {
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return new Uint8Array(buffer ?? new ArrayBuffer(0));
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}
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function toArrayBuffer(bytes: Uint8Array | ArrayBuffer): ArrayBuffer {
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return bytes instanceof Uint8Array ? bytes.buffer.slice(bytes.byteOffset, bytes.byteOffset + bytes.byteLength) : (bytes ?? new ArrayBuffer(0));
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}
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function makeProperties(item: any): BleCharacteristicProperties {
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const props = item?.properties ?? {};
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const read = props.read === true;
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const write = props.write === true;
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const notify = props.notify === true;
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const indicate = props.indicate === true;
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const writeNoRsp = props.writeNoResponse === true || props.writeWithoutResponse === true;
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return {
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read,
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write,
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notify,
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indicate,
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writeWithoutResponse: writeNoRsp,
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canRead: read,
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canWrite: write || writeNoRsp,
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canNotify: notify || indicate
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};
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}
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export class ServiceManager {
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private static instance: ServiceManager | null = null;
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private services = new Map<string, BleService[]>();
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private characteristics = new Map<string, Map<string, BleCharacteristic[]>>();
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private pendingReads = new Map<string, PendingRead>();
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private notifyCallbacks = new Map<string, BleDataReceivedCallback>();
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private listenersRegistered: boolean = false;
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private deviceManager = DeviceManager.getInstance();
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private constructor() {}
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static getInstance(): ServiceManager {
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if (ServiceManager.instance == null) {
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ServiceManager.instance = new ServiceManager();
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}
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return ServiceManager.instance!;
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}
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private ensureListeners() {
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if (this.listenersRegistered) return;
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this.listenersRegistered = true;
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wx.onBLECharacteristicValueChange((res: any) => {
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try { this.handleNotify(res); } catch (e) { }
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});
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}
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private cacheKey(deviceId: string, serviceId: string): string {
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return `${deviceId}|${serviceId}`;
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}
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private notifyKey(deviceId: string, serviceId: string, characteristicId: string): string {
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return `${deviceId}|${serviceId}|${characteristicId}`;
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}
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async getServices(deviceId: string, callback?: (services: BleService[] | null, error?: Error) => void): Promise<BleService[]> {
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const cached = this.services.get(deviceId);
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if (cached != null && cached.length > 0) {
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if (callback != null) callback(cached, null);
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return cached;
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}
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return new Promise((resolve, reject) => {
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wx.getBLEDeviceServices({
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deviceId,
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success: (res: any) => {
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const list: BleService[] = [];
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const services: any[] = res?.services ?? [];
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for (let i = 0; i < services.length; i++) {
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const svc = services[i];
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if (svc == null) continue;
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list.push({ uuid: svc.uuid, isPrimary: svc.isPrimary === true });
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}
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this.services.set(deviceId, list);
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if (callback != null) callback(list, null);
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resolve(list);
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},
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fail: (err: any) => {
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const error = err ?? new Error('getBLEDeviceServices failed');
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if (callback != null) callback(null, error);
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reject(error);
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}
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});
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});
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}
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async getCharacteristics(deviceId: string, serviceId: string, callback?: (list: BleCharacteristic[] | null, error?: Error) => void): Promise<BleCharacteristic[]> {
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const map = this.characteristics.get(deviceId);
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const cached = map != null ? map.get(serviceId) : null;
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if (cached != null && cached.length > 0) {
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if (callback != null) callback(cached, null);
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return cached;
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}
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return new Promise((resolve, reject) => {
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wx.getBLEDeviceCharacteristics({
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deviceId,
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serviceId,
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success: (res: any) => {
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const list: BleCharacteristic[] = [];
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const chars: any[] = res?.characteristics ?? [];
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for (let i = 0; i < chars.length; i++) {
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const ch = chars[i];
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if (ch == null) continue;
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list.push({
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uuid: ch.uuid,
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service: { uuid: serviceId, isPrimary: true },
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properties: makeProperties(ch)
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});
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}
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let mapRef = this.characteristics.get(deviceId);
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if (mapRef == null) {
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mapRef = new Map<string, BleCharacteristic[]>();
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this.characteristics.set(deviceId, mapRef);
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}
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mapRef.set(serviceId, list);
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if (callback != null) callback(list, null);
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resolve(list);
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},
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fail: (err: any) => {
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const error = err ?? new Error('getBLEDeviceCharacteristics failed');
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if (callback != null) callback(null, error);
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reject(error);
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}
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});
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});
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}
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async readCharacteristic(deviceId: string, serviceId: string, characteristicId: string): Promise<ArrayBuffer> {
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this.ensureListeners();
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return new Promise<ArrayBuffer>((resolve, reject) => {
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const key = `${deviceId}|${serviceId}|${characteristicId}|read`;
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const timer = setTimeout(() => {
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this.pendingReads.delete(key);
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reject(new Error('读取超时'));
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}, 10000);
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this.pendingReads.set(key, { resolve, reject, timer });
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wx.readBLECharacteristicValue({
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deviceId,
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serviceId,
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characteristicId,
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fail: (err: any) => {
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this.pendingReads.delete(key);
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clearTimeout(timer);
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reject(err ?? new Error('readBLECharacteristicValue failed'));
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}
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});
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});
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}
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async writeCharacteristic(deviceId: string, serviceId: string, characteristicId: string, value: Uint8Array | ArrayBuffer, options?: WriteCharacteristicOptions): Promise<boolean> {
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const buffer = toArrayBuffer(value);
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return new Promise<boolean>((resolve, reject) => {
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wx.writeBLECharacteristicValue({
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deviceId,
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serviceId,
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characteristicId,
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value: buffer,
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fail: (err: any) => {
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reject(err ?? new Error('writeBLECharacteristicValue failed'));
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},
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success: () => {
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resolve(true);
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}
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});
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});
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}
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async subscribeCharacteristic(deviceId: string, serviceId: string, characteristicId: string, callback: BleDataReceivedCallback): Promise<void> {
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this.ensureListeners();
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const key = this.notifyKey(deviceId, serviceId, characteristicId);
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this.notifyCallbacks.set(key, callback);
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return new Promise<void>((resolve, reject) => {
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wx.notifyBLECharacteristicValueChange({
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deviceId,
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serviceId,
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characteristicId,
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state: true,
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success: () => resolve(),
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fail: (err: any) => {
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this.notifyCallbacks.delete(key);
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reject(err ?? new Error('notifyBLECharacteristicValueChange failed'));
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}
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});
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});
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}
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async unsubscribeCharacteristic(deviceId: string, serviceId: string, characteristicId: string): Promise<void> {
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const key = this.notifyKey(deviceId, serviceId, characteristicId);
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this.notifyCallbacks.delete(key);
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return new Promise<void>((resolve, reject) => {
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wx.notifyBLECharacteristicValueChange({
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deviceId,
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serviceId,
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characteristicId,
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state: false,
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success: () => resolve(),
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fail: (err: any) => {
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reject(err ?? new Error('notifyBLECharacteristicValueChange disable failed'));
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}
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});
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});
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}
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async autoDiscoverAll(deviceId: string): Promise<AutoDiscoverAllResult> {
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const services = await this.getServices(deviceId);
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const allChars: BleCharacteristic[] = [];
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for (let i = 0; i < services.length; i++) {
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const svc = services[i];
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const chars = await this.getCharacteristics(deviceId, svc.uuid);
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for (let j = 0; j < chars.length; j++) {
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allChars.push(chars[j]);
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}
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}
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return { services, characteristics: allChars };
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}
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async subscribeAllNotifications(deviceId: string, callback: BleDataReceivedCallback): Promise<void> {
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const services = await this.getServices(deviceId);
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for (let i = 0; i < services.length; i++) {
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const svc = services[i];
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const chars = await this.getCharacteristics(deviceId, svc.uuid);
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for (let j = 0; j < chars.length; j++) {
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const ch = chars[j];
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if (ch.properties != null && (ch.properties.notify || ch.properties.indicate)) {
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try {
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await this.subscribeCharacteristic(deviceId, svc.uuid, ch.uuid, callback);
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} catch (e) { }
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}
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}
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}
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}
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private handleNotify(res: any) {
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const deviceId = res?.deviceId ?? '';
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const serviceId = res?.serviceId ?? '';
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const characteristicId = res?.characteristicId ?? '';
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const key = `${deviceId}|${serviceId}|${characteristicId}|read`;
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const buffer: ArrayBuffer = res?.value ?? new ArrayBuffer(0);
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const pending = this.pendingReads.get(key);
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if (pending != null) {
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this.pendingReads.delete(key);
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if (pending.timer != null) clearTimeout(pending.timer);
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try { pending.resolve(buffer); } catch (e) { }
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}
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const notifyKey = this.notifyKey(deviceId, serviceId, characteristicId);
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const cb = this.notifyCallbacks.get(notifyKey);
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if (cb != null) {
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try { cb(toUint8Array(buffer)); } catch (e) { }
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}
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}
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}
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