const jcapi = uni.requireNativePlugin("JCSDK-JCApiModule");
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let state = {
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connectedDevice: null,
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connectionStatus: "disconnected", // disconnected | connecting | connected
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listeners: [],
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};
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/** 通知所有订阅页面 */
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function notify() {
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state.listeners.forEach(fn => fn({
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connectedDevice: state.connectedDevice,
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connectionStatus: state.connectionStatus,
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}));
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}
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/** 页面订阅蓝牙状态 */
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function onChange(fn) {
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state.listeners.push(fn);
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fn({
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connectedDevice: state.connectedDevice,
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connectionStatus: state.connectionStatus,
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});
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}
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/** 初始化（全局只需一次） */
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function init() {
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jcapi.initSDK();
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const saved = uni.getStorageSync("bluetoothConnection");
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if (saved) {
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state.connectedDevice = saved;
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state.connectionStatus = "connected";
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}
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// 断开监听
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jcapi.didReadPrintErrorInfo((r) => {
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if (r.code === 23) {
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state.connectedDevice = null;
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state.connectionStatus = "disconnected";
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uni.removeStorageSync("bluetoothConnection");
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notify();
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}
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});
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}
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/** 搜索设备 */
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function searchDevices() {
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return new Promise((resolve, reject) => {
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uni.openBluetoothAdapter({
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success() {
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jcapi.getBluetoothDevices(list => {
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resolve(list || []);
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});
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},
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fail: reject
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});
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});
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}
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/** 连接设备 */
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function connect(device) {
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return new Promise((resolve, reject) => {
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state.connectionStatus = "connecting";
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notify();
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jcapi.openPrinterByDevice({
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address: device.address,
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name: device.name,
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deviceType: 0,
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}, (r) => {
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if (r.code === 0) {
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state.connectedDevice = device;
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state.connectionStatus = "connected";
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uni.setStorageSync("bluetoothConnection", device);
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notify();
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resolve(device);
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} else {
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state.connectionStatus = "disconnected";
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notify();
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reject(r);
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}
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});
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});
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}
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function isConnected() {
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return state.connectionStatus === "connected";
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}
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function getCurrentDevice() {
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return state.connectedDevice;
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}
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export default {
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init,
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onChange,
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searchDevices,
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connect,
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isConnected,
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getCurrentDevice,
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};
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