66 lines
1.6 KiB
TypeScript
66 lines
1.6 KiB
TypeScript
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import { BluetoothUtils, Device } from "@/bluetooth-utils";
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import { wait } from "@r-utils/common";
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type DeviceData = Required<Device>;
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export class Printer {
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device: DeviceData;
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size = 0;
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constructor(device: DeviceData, { size = 80 } = {}) {
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this.device = device;
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this.size = size;
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}
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async print(data: number[]) {
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console.log(
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data.length,
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data.slice(0, 100),
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data.slice(data.length - 100, data.length)
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);
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let res = null;
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const systemInfo = uni.getSystemInfoSync();
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if (systemInfo.uniPlatform === "app" && systemInfo.osName === "android") {
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res = await BluetoothUtils.sendDataAndroid(this.device, data);
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} else {
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res = await BluetoothUtils.bindDevice(this.device, async () => {
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await wait(100);
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return await this._print(data);
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});
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}
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return res;
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}
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async _print(data: number[]):Promise<any> {
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const size = Math.min(data.length, this.size);
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if (size === 0) {
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return;
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}
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const buf = new ArrayBuffer(size);
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const dataView = new DataView(buf);
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for (let i = 0; i < size; i++) {
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dataView.setUint8(i, data[i]);
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}
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await new Promise((resolve, reject) => {
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uni.writeBLECharacteristicValue({
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deviceId: this.device.deviceId,
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serviceId: this.device.writeServiceId,
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characteristicId: this.device.writeCharacterId,
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value: buf,
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success: (res) => {
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resolve(res);
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},
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fail: (err) => {
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reject(err);
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},
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});
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});
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await wait(30);
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return await this._print(data.slice(size));
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}
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}
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