lts-cron-editor
Version:
基于antd、react的crontab表达式生成工具
562 lines (541 loc) • 23.7 kB
JavaScript
/**
* 功能：解析cron类
* 作者：宋鑫鑫
* 日期：2019.11.04
*/
class CronParse {
constructor() {
// constructor是一个构造方法，用来接收参数
this.dayRule = "";
this.dayRuleSup = "";
this.dateArr = [];
this.resultList = [];
this.isShow = false;
}
// 表达式值变化时，开始去计算结果
expressionChange(cron) {
// 计算开始-隐藏结果
this.isShow = false;
// 获取规则数组[0秒、1分、2时、3日、4月、5星期、6年]
const ruleArr = cron.split(" ");
// 用于记录进入循环的次数
let nums = 0;
// 用于暂时存符号时间规则结果的数组
const resultArr = [];
// 获取当前时间精确至[年、月、日、时、分、秒]
const nTime = new Date();
const nYear = nTime.getFullYear();
let nMouth = nTime.getMonth() + 1;
let nDay = nTime.getDate();
let nHour = nTime.getHours();
let nMin = nTime.getMinutes();
let nSecond = nTime.getSeconds();
// 根据规则获取到近100年可能年数组、月数组等等
this.getSecondArr(ruleArr[0]);
this.getMinArr(ruleArr[1]);
this.getHourArr(ruleArr[2]);
this.getDayArr(ruleArr[3]);
this.getMouthArr(ruleArr[4]);
this.getWeekArr(ruleArr[5]);
this.getYearArr(ruleArr[6], nYear);
// 将获取到的数组赋值-方便使用
const sDate = this.dateArr[0];
const mDate = this.dateArr[1];
const hDate = this.dateArr[2];
const DDate = this.dateArr[3];
const MDate = this.dateArr[4];
const YDate = this.dateArr[5];
// 获取当前时间在数组中的索引
let sIdx = this.getIndex(sDate, nSecond);
let mIdx = this.getIndex(mDate, nMin);
let hIdx = this.getIndex(hDate, nHour);
let DIdx = this.getIndex(DDate, nDay);
let MIdx = this.getIndex(MDate, nMouth);
const YIdx = this.getIndex(YDate, nYear);
// 重置月日时分秒的函数(后面用的比较多)
const resetSecond = function() {
sIdx = 0;
nSecond = sDate[sIdx];
};
const resetMin = function() {
mIdx = 0;
nMin = mDate[mIdx];
resetSecond();
};
const resetHour = function() {
hIdx = 0;
nHour = hDate[hIdx];
resetMin();
};
const resetDay = function() {
DIdx = 0;
nDay = DDate[DIdx];
resetHour();
};
const resetMouth = function() {
MIdx = 0;
nMouth = MDate[MIdx];
resetDay();
};
// 如果当前年份不为数组中当前值
if (nYear !== YDate[YIdx]) {
resetMouth();
}
// 如果当前月份不为数组中当前值
if (nMouth !== MDate[MIdx]) {
resetDay();
}
// 如果当前“日”不为数组中当前值
if (nDay !== DDate[DIdx]) {
resetHour();
}
// 如果当前“时”不为数组中当前值
if (nHour !== hDate[hIdx]) {
resetMin();
}
// 如果当前“分”不为数组中当前值
if (nMin !== mDate[mIdx]) {
resetSecond();
}
// 循环年份数组
goYear: for (let Yi = YIdx; Yi < YDate.length; Yi++) {
const YY = YDate[Yi];
// 如果到达最大值时
if (nMouth > MDate[MDate.length - 1]) {
resetMouth();
continue;
}
// 循环月份数组
goMouth: for (let Mi = MIdx; Mi < MDate.length; Mi++) {
// 赋值、方便后面运算
let MM = MDate[Mi];
MM = MM < 10 ? `0${MM}` : MM;
// 如果到达最大值时
if (nDay > DDate[DDate.length - 1]) {
resetDay();
if (Mi === MDate.length - 1) {
resetMouth();
continue goYear;
}
continue;
}
// 循环日期数组
goDay: for (let Di = DIdx; Di < DDate.length; Di++) {
// 赋值、方便后面运算
let DD = DDate[Di];
let thisDD = DD < 10 ? `0${DD}` : DD;
// 如果到达最大值时
if (nHour > hDate[hDate.length - 1]) {
resetHour();
if (Di === DDate.length - 1) {
resetDay();
if (Mi === MDate.length - 1) {
resetMouth();
continue goYear;
}
continue goMouth;
}
continue;
}
// 判断日期的合法性，不合法的话也是跳出当前循环
if (
this.checkDate(`${YY}-${MM}-${thisDD} 00:00:00`) !== true &&
this.dayRule !== "workDay" &&
this.dayRule !== "lastWeek" &&
this.dayRule !== "lastDay"
) {
resetDay();
continue goMouth;
}
// 如果日期规则中有值时
if (this.dayRule === "lastDay") {
// 如果不是合法日期则需要将前将日期调到合法日期即月末最后一天
if (this.checkDate(`${YY}-${MM}-${thisDD} 00:00:00`) !== true) {
while (this.checkDate(`${YY}-${MM}-${thisDD} 00:00:00`) !== true) {
DD--;
thisDD = DD < 10 ? `0${DD}` : DD;
}
}
} else if (this.dayRule === "workDay") {
// 校验并调整如果是2月30号这种日期传进来时需调整至正常月底
if (this.checkDate(`${YY}-${MM}-${thisDD} 00:00:00`) !== true) {
while (this.checkDate(`${YY}-${MM}-${thisDD} 00:00:00`) !== true) {
DD--;
thisDD = DD < 10 ? `0${DD}` : DD;
}
}
// 获取达到条件的日期是星期X
const thisWeek = this.formatDate(new Date(`${YY}-${MM}-${thisDD} 00:00:00`), "week");
// 当星期日时
if (thisWeek === 0) {
// 先找下一个日，并判断是否为月底
DD++;
thisDD = DD < 10 ? `0${DD}` : DD;
// 判断下一日已经不是合法日期
if (this.checkDate(`${YY}-${MM}-${thisDD} 00:00:00`) !== true) {
DD -= 3;
}
} else if (thisWeek === 6) {
// 当星期6时只需判断不是1号就可进行操作
if (this.dayRuleSup !== 1) {
DD--;
} else {
DD += 2;
}
}
} else if (this.dayRule === "weekDay") {
// 如果指定了是星期几
// 获取当前日期是属于星期几
const thisWeek = this.formatDate(new Date(`${YY}-${MM}-${DD} 00:00:00`), "week");
// 校验当前星期是否在星期池（dayRuleSup）中
if (Array.indexOf(this.dayRuleSup, thisWeek) < 0) {
// 如果到达最大值时
if (Di === DDate.length - 1) {
resetDay();
if (Mi === MDate.length - 1) {
resetMouth();
continue goYear;
}
continue goMouth;
}
continue;
}
} else if (this.dayRule === "assWeek") {
// 如果指定了是第几周的星期几
// 获取每月1号是属于星期几
const thisWeek = this.formatDate(new Date(`${YY}-${MM}-${DD} 00:00:00`), "week");
if (this.dayRuleSup[1] >= thisWeek) {
DD = (this.dayRuleSup[0] - 1) * 7 + this.dayRuleSup[1] - thisWeek + 1;
} else {
DD = this.dayRuleSup[0] * 7 + this.dayRuleSup[1] - thisWeek + 1;
}
} else if (this.dayRule === "lastWeek") {
// 如果指定了每月最后一个星期几
// 校验并调整如果是2月30号这种日期传进来时需调整至正常月底
if (this.checkDate(`${YY}-${MM}-${thisDD} 00:00:00`) !== true) {
while (this.checkDate(`${YY}-${MM}-${thisDD} 00:00:00`) !== true) {
DD--;
thisDD = DD < 10 ? `0${DD}` : DD;
}
}
// 获取月末最后一天是星期几
const thisWeek = this.formatDate(new Date(`${YY}-${MM}-${thisDD} 00:00:00`), "week");
// 找到要求中最近的那个星期几
if (this.dayRuleSup < thisWeek) {
DD -= thisWeek - this.dayRuleSup;
} else if (this.dayRuleSup > thisWeek) {
DD -= 7 - (this.dayRuleSup - thisWeek);
}
}
// 判断时间值是否小于10置换成“05”这种格式
DD = DD < 10 ? `0${DD}` : DD;
// 循环“时”数组
goHour: for (let hi = hIdx; hi < hDate.length; hi++) {
const hh = hDate[hi] < 10 ? `0${hDate[hi]}` : hDate[hi];
// 如果到达最大值时
if (nMin > mDate[mDate.length - 1]) {
resetMin();
if (hi === hDate.length - 1) {
resetHour();
if (Di === DDate.length - 1) {
resetDay();
if (Mi === MDate.length - 1) {
resetMouth();
continue goYear;
}
continue goMouth;
}
continue goDay;
}
continue;
}
// 循环"分"数组
goMin: for (let mi = mIdx; mi < mDate.length; mi++) {
const mm = mDate[mi] < 10 ? `0${mDate[mi]}` : mDate[mi];
// 如果到达最大值时
if (nSecond > sDate[sDate.length - 1]) {
resetSecond();
if (mi === mDate.length - 1) {
resetMin();
if (hi === hDate.length - 1) {
resetHour();
if (Di === DDate.length - 1) {
resetDay();
if (Mi === MDate.length - 1) {
resetMouth();
continue goYear;
}
continue goMouth;
}
continue goDay;
}
continue goHour;
}
continue;
}
// 循环"秒"数组
for (let si = sIdx; si <= sDate.length - 1; si++) {
const ss = sDate[si] < 10 ? `0${sDate[si]}` : sDate[si];
// 添加当前时间（时间合法性在日期循环时已经判断）
resultArr.push(`${YY}-${MM}-${DD} ${hh}:${mm}:${ss}`);
nums++;
// 如果条数满了就退出循环
if (nums === 5) break goYear;
// 如果到达最大值时
if (si === sDate.length - 1) {
resetSecond();
if (mi === mDate.length - 1) {
resetMin();
if (hi === hDate.length - 1) {
resetHour();
if (Di === DDate.length - 1) {
resetDay();
if (Mi === MDate.length - 1) {
resetMouth();
continue goYear;
}
continue goMouth;
}
continue goDay;
}
continue goHour;
}
continue goMin;
}
} // goSecond
} // goMin
} // goHour
} // goDay
} // goMouth
}
// 判断100年内的结果条数
if (resultArr.length === 0) {
this.resultList = ["没有达到条件的结果！"];
} else {
this.resultList = resultArr;
if (resultArr.length !== 5) {
this.resultList.push(`最近100年内只有上面${resultArr.length}条结果！`);
}
}
// 计算完成-显示结果
this.isShow = true;
return this.resultList;
}
// 用于计算某位数字在数组中的索引
getIndex(arr, value) {
if (value <= arr[0] || value > arr[arr.length - 1]) {
return 0;
}
for (let i = 0; i < arr.length - 1; i++) {
if (value > arr[i] && value <= arr[i + 1]) {
return i + 1;
}
}
}
// 获取"年"数组
getYearArr(rule, year) {
this.dateArr[5] = this.getOrderArr(year, year + 100);
if (rule !== undefined) {
if (rule.indexOf("-") >= 0) {
this.dateArr[5] = this.getCycleArr(rule, year + 100, false);
} else if (rule.indexOf("/") >= 0) {
this.dateArr[5] = this.getAverageArr(rule, year + 100);
} else if (rule !== "*") {
this.dateArr[5] = this.getAssignArr(rule);
}
}
}
// 获取"月"数组
getMouthArr(rule) {
this.dateArr[4] = this.getOrderArr(1, 12);
if (rule.indexOf("-") >= 0) {
this.dateArr[4] = this.getCycleArr(rule, 12, false);
} else if (rule.indexOf("/") >= 0) {
this.dateArr[4] = this.getAverageArr(rule, 12);
} else if (rule !== "*") {
this.dateArr[4] = this.getAssignArr(rule);
}
}
// 获取"日"数组-主要为日期规则
getWeekArr(rule) {
// 只有当日期规则的两个值均为“”时则表达日期是有选项的
if (this.dayRule === "" && this.dayRuleSup === "") {
if (rule.indexOf("-") >= 0) {
this.dayRule = "weekDay";
this.dayRuleSup = this.getCycleArr(rule, 7, false);
} else if (rule.indexOf("#") >= 0) {
this.dayRule = "assWeek";
const matchRule = rule.match(/[0-9]{1}/g);
this.dayRuleSup = [Number(matchRule[0]), Number(matchRule[1])];
this.dateArr[3] = [1];
if (this.dayRuleSup[1] === 7) {
this.dayRuleSup[1] = 0;
}
} else if (rule.indexOf("L") >= 0) {
this.dayRule = "lastWeek";
this.dayRuleSup = Number(rule.match(/[0-9]{1,2}/g)[0]);
this.dateArr[3] = [31];
if (this.dayRuleSup === 7) {
this.dayRuleSup = 0;
}
} else if (rule !== "*" && rule !== "?") {
this.dayRule = "weekDay";
this.dayRuleSup = this.getAssignArr(rule);
}
// 如果weekDay时将7调整为0【week值0即是星期日】
if (this.dayRule === "weekDay") {
for (let i = 0; i < this.dayRuleSup.length; i++) {
if (this.dayRuleSup[i] === 7) {
this.dayRuleSup[i] = 0;
}
}
}
}
}
// 获取"日"数组-少量为日期规则
getDayArr(rule) {
this.dateArr[3] = this.getOrderArr(1, 31);
this.dayRule = "";
this.dayRuleSup = "";
if (rule.indexOf("-") >= 0) {
this.dateArr[3] = this.getCycleArr(rule, 31, false);
this.dayRuleSup = "null";
} else if (rule.indexOf("/") >= 0) {
this.dateArr[3] = this.getAverageArr(rule, 31);
this.dayRuleSup = "null";
} else if (rule.indexOf("W") >= 0) {
this.dayRule = "workDay";
this.dayRuleSup = Number(rule.match(/[0-9]{1,2}/g)[0]);
this.dateArr[3] = [this.dayRuleSup];
} else if (rule.indexOf("L") >= 0) {
this.dayRule = "lastDay";
this.dayRuleSup = "null";
this.dateArr[3] = [31];
} else if (rule !== "*" && rule !== "?") {
this.dateArr[3] = this.getAssignArr(rule);
this.dayRuleSup = "null";
} else if (rule === "*") {
this.dayRuleSup = "null";
}
}
// 获取"时"数组
getHourArr(rule) {
this.dateArr[2] = this.getOrderArr(0, 23);
if (rule.indexOf("-") >= 0) {
this.dateArr[2] = this.getCycleArr(rule, 24, true);
} else if (rule.indexOf("/") >= 0) {
this.dateArr[2] = this.getAverageArr(rule, 23);
} else if (rule !== "*") {
this.dateArr[2] = this.getAssignArr(rule);
}
}
// 获取"分"数组
getMinArr(rule) {
this.dateArr[1] = this.getOrderArr(0, 59);
if (rule.indexOf("-") >= 0) {
this.dateArr[1] = this.getCycleArr(rule, 60, true);
} else if (rule.indexOf("/") >= 0) {
this.dateArr[1] = this.getAverageArr(rule, 59);
} else if (rule !== "*") {
this.dateArr[1] = this.getAssignArr(rule);
}
}
// 获取"秒"数组
getSecondArr(rule) {
this.dateArr[0] = this.getOrderArr(0, 59);
if (rule.indexOf("-") >= 0) {
this.dateArr[0] = this.getCycleArr(rule, 60, true);
} else if (rule.indexOf("/") >= 0) {
this.dateArr[0] = this.getAverageArr(rule, 59);
} else if (rule !== "*") {
this.dateArr[0] = this.getAssignArr(rule);
}
}
// 根据传进来的min-max返回一个顺序的数组
getOrderArr(min, max) {
const arr = [];
for (let i = min; i <= max; i++) {
arr.push(i);
}
return arr;
}
// 根据规则中指定的零散值返回一个数组
getAssignArr(rule) {
const arr = [];
const assiginArr = rule.split(",");
for (let i = 0; i < assiginArr.length; i++) {
arr[i] = Number(assiginArr[i]);
}
arr.sort(this.compare);
return arr;
}
// 根据一定算术规则计算返回一个数组
getAverageArr(rule, limit) {
const arr = [];
const agArr = rule.split("/");
let min = Number(agArr[0]);
const step = Number(agArr[1]);
while (min <= limit) {
arr.push(min);
min += step;
}
return arr;
}
// 根据规则返回一个具有周期性的数组
getCycleArr(rule, limit, status) {
// status--表示是否从0开始（则从1开始）
const arr = [];
const cycleArr = rule.split("-");
const min = Number(cycleArr[0]);
let max = Number(cycleArr[1]);
if (min > max) {
max += limit;
}
for (let i = min; i <= max; i++) {
let add = 0;
if (status === false && i % limit === 0) {
add = limit;
}
arr.push(Math.round((i % limit) + add));
}
arr.sort(this.compare);
return arr;
}
// 比较数字大小（用于Array.sort）
compare(value1, value2) {
if (value2 - value1 > 0) {
return -1;
}
return 1;
}
// 格式化日期格式如：2017-9-19 18:04:33
formatDate(value, type) {
// 计算日期相关值
const time = typeof value === "number" ? new Date(value) : value;
const Y = time.getFullYear();
const M = time.getMonth() + 1;
const D = time.getDate();
const h = time.getHours();
const m = time.getMinutes();
const s = time.getSeconds();
const week = time.getDay();
// 如果传递了type的话
if (type === undefined) {
return `${Y}-${M < 10 ? `0${M}` : M}-${D < 10 ? `0${D}` : D} ${h < 10 ? `0${h}` : h}:${m < 10 ? `0${m}` : m}:${s < 10 ? `0${s}` : s}`;
}
if (type === "week") {
return week;
}
}
// 检查日期是否存在
checkDate(value) {
const time = new Date(value);
const format = this.formatDate(time);
return value === format;
}
}
// export default {
// CronParse
// }
export default CronParse;
// module.exports = CronParse