90 lines
2.3 KiB
JavaScript
90 lines
2.3 KiB
JavaScript
/* 基础小工具，可通用于服务端和用户端
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*/
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module.exports = {
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sleep: (ms) => new Promise((resolve, reject) => setTimeout(resolve, ms)),
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parseJsonPossible(value) {
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try {
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return JSON.parse(value)
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} catch (e) {
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return value
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}
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},
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sortAndFilterJson({ fields, entity, exclude = [] } = {}) {
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const newEntity = {}
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for (let key of Object.keys(fields).sort()) {
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if (typeof (entity[key] !== 'undefined') && !Number.isNaN(entity[key]) && entity[key] !== Infinity) {
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newEntity[key] = entity[key]
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}
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}
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for (let exkey of exclude) {
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delete newEntity[exkey]
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}
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return JSON.stringify(newEntity)
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},
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name2port(name='') {
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let port = name.toLowerCase()
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.replace(/[abc]/g, 2)
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.replace(/[def]/g, 3)
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.replace(/[ghi]/g, 4)
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.replace(/[jkl]/g, 5)
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.replace(/[mno]/g, 6)
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.replace(/[pqrs]/g, 7)
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.replace(/[tuv]/g, 8)
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.replace(/[wxyz]/g, 9)
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return parseInt(port)
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},
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/**
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* 用户编号转邀请码
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*
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* @static
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* @param {*} aiid
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* @return {*}
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* @memberof TICrypto
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*/
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aiid2regcode(aiid) {
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const alphabet = 'e5fcdg3hqa4b1n0pij2rstuv67mwx89klyz'
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const base = 16367
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let num = (aiid + base) * (base - alphabet.length)
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let code = ''
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let mod
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while (num > 0) {
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mod = num % alphabet.length
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num = (num - mod) / alphabet.length
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code = code + alphabet[mod] // 倒序存放
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}
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return code
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},
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/**
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* 邀请码转用户编号
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*
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* @static
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* @param {*} code
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* @return {*}
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* @memberof TICrypto
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*/
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regcode2aiid(code) {
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if (typeof code === 'string' && /^[a-zA-Z0-9]+$/.test(code)) {
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const alphabet = 'e5fcdg3hqa4b1n0pij2rstuv67mwx89klyz'
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const base = 16367
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code = code.toLowerCase()
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let len = code.length
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let num = 0
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for (let i = 0; i < len; i++) {
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num += alphabet.indexOf(code[i]) * Math.pow(alphabet.length, i)
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}
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let aiid = num / (base - alphabet.length) - base
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if (aiid >= 0 && Number.isInteger(aiid)) {
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// 允许 aiid===0：当第一个用户（aiid==1）登录时，需要一个系统默认的邀请码。
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return aiid
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}
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}
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return null // null 代表一切非法的regcode
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},
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} |