55 lines
1.5 KiB
JavaScript
55 lines
1.5 KiB
JavaScript
/**
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* 统一等待 UUID_STATE 通知。
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*
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* @param {object} ble createBleCore 实例
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* @param {object} options 等待配置
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* @param {number[]} options.allowedCodes 允许通过的状态码；为空则接收任意状态码
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* @param {boolean} options.rejectOnUnexpected 收到非 allowedCodes 状态码时是否立刻失败
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* @param {number} options.timeout 超时时间(ms)
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* @param {string} options.timeoutMessage 超时提示
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* @param {string} options.unexpectedMessage 非预期状态提示前缀
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*/
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export function waitForProtocolState(ble, options = {}) {
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const {
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allowedCodes = [],
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rejectOnUnexpected = false,
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timeout = 6000,
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timeoutMessage = '等待 UUID_STATE 超时',
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unexpectedMessage = '收到非预期 UUID_STATE 状态码'
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} = options
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return new Promise((resolve, reject) => {
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let timer = null
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let off = null
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const finish = (callback) => {
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if (timer) {
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clearTimeout(timer)
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}
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if (off) {
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off()
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}
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callback()
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}
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timer = setTimeout(() => {
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finish(() => reject(new Error(timeoutMessage)))
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}, timeout)
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off = ble.on('protocol:state', (payload) => {
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const stateCode = Number(payload?.stateCode)
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if (!allowedCodes.length || allowedCodes.includes(stateCode)) {
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finish(() => resolve(payload))
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return
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}
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if (rejectOnUnexpected) {
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finish(() => reject(new Error(`${unexpectedMessage}: ${stateCode}`)))
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}
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})
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})
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}
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