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* Copyright 2021 Harness Inc. All rights reserved.
* Use of this source code is governed by the PolyForm Shield 1.0.0 license
* that can be found in the licenses directory at the root of this repository, also available at
* https://polyformproject.org/wp-content/uploads/2020/06/PolyForm-Shield-1.0.0.txt.
*/
// * * * * * *
// ┬ ┬ ┬ ┬ ┬ ┬
// │ │ │ │ │ |
// │ │ │ │ │ └ day of week (0 - 7) (0 or 7 is Sun)
// │ │ │ │ └───── month (1 - 12)
// │ │ │ └────────── day of month (1 - 31, L)
// │ │ └─────────────── hour (0 - 23)
// │ └──────────────────── minute (0 - 59)
// └───────────────────────── second (0 - 59, optional)
// Rules:
// [Freq] -> [components to render]
// Daily -> hour, min
// Weekly -> day of week, hour, min, day of month = '?'
// Monthly -> day of month, hour, min
// Yearly -> month, day of month, hour, min
import React, { useReducer, useMemo, useEffect } from 'react'
import { Container, Select, Text } from '@wings-software/uicore'
import { useStrings } from 'framework/strings'
import css from './Cron.module.scss'
interface ISelectOption {
label: string
value: number
}
const getFrequencyOptions = () => {
return [
{ label: 'Daily', value: 'day' },
{ label: 'Weekly', value: 'week' },
{ label: 'Monthly', value: 'month' },
{ label: 'Yearly', value: 'year' }
]
}
const getMonthOptions = (): ISelectOption[] => {
const MONTHS = [
'January',
'February',
'March',
'April',
'May',
'June',
'July',
'August',
'September',
'October',
'November',
'December'
]
return MONTHS.map((m, i) => ({ label: m, value: i + 1 }))
}
const getDaysOfWeekOptions = (): ISelectOption[] => {
const DAYS = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday']
return DAYS.map((d, i) => ({ label: d, value: i }))
}
const getDaysOfMonthOptions = () => {
const DAYS_OF_MONTH_OPTIONS: ISelectOption[] = []
for (let d = 1; d < 32; d++) {
let suffix = ''
switch (d) {
case 1:
case 21:
case 31:
suffix = 'st'
break
case 2:
case 22:
suffix = 'nd'
break
case 3:
case 23:
suffix = 'rd'
break
default:
suffix = 'th'
break
}
DAYS_OF_MONTH_OPTIONS.push({
label: d + suffix,
value: d
})
}
return DAYS_OF_MONTH_OPTIONS
}
const getHourOptions = () => {
const precision = [12, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]
const am: ISelectOption[] = []
const pm: ISelectOption[] = []
precision.forEach((p, i) => {
am.push({ label: `${p}:00 AM`, value: i }) // 12:00 AM
am.push({ label: `${p}:30 AM`, value: i + 0.5 }) // 12:30 AM
pm.push({ label: `${p}:00 PM`, value: i + 12 }) // 12:00 PM
pm.push({ label: `${p}:30 PM`, value: i + 12 + 0.5 }) // 12:30 PM
})
return [...am, ...pm]
}
export const FREQUENCY_OPTIONS = getFrequencyOptions()
export const MONTH_OPTIONS = getMonthOptions()
export const DAYS_OF_WEEK_OPTIONS = getDaysOfWeekOptions()
export const DAYS_OF_MONTH_OPTIONS = getDaysOfMonthOptions()
export const HOUR_OPTIONS = getHourOptions()
const getMins = (h: number) => (h % Math.floor(h) > 0 ? 30 : 0)
const VALID_CRON_REGEX = /^((\d{1,2}|\*)\s){2}(\*|\?|\d{1,2})\s(\d{1,2}|\*)\s(\d{1,2}|\*|\?)$/
const CRON_TYPE: Record<string, RegExp> = {
minute: /^(\*\s){4}\*$/, // "* * * * *"
hour: /^\d{1,2}\s(\*\s){3}\*$/, // "? * * * *"
day: /^(\d{1,2}\s){2}(\*|\?)\s(\*\s)(\*|\?)$/, // "a b * * ?"
week: /^((\d{1,2}|\*)\s){2}(\*|\?)\s(\*\s)\d{1,2}$/, // "a b * * c"
month: /^((\d{1,2}|\*)\s){2}\d{1,2}\s\*\s(\?|\*)$/, // "a b c * ?"
year: /^(\d{1,2}\s){4}(\?|\*)$/ // "a b c d ?"
}
const getCronType = (cron: string): void | string => {
if (typeof cron !== 'string' || !VALID_CRON_REGEX.test(cron)) {
return
}
// Structure: [mins, hours, dayOfMonth, month, dayOfWeek]
const minval = [0, 0, 1, 1, 0]
const maxval = [59, 23, 31, 12, 6]
const cronParts = cron.split(' ')
for (let i = 0; i < cronParts.length; i++) {
const unit = cronParts[i]
if (unit === '*' || unit === '?') continue
const value = parseInt(unit)
Eif (value <= maxval[i] && value >= minval[i]) {
continue
}
return
}
for (const type in CRON_TYPE) {
if (CRON_TYPE[type].test(cron)) {
return type
}
}
}
// check if dayOfWeek is in 'SUN', 'MON' format,
// If yes, convert it to 0, 1, etc. Our cron component doesn't
// support it. We support numbers only.
// This may be needed for legacy cron values/backward compat
const replaceDayOfWeek = (cron: string) => {
const weekdayToNums: Record<string, string> = {
SUN: '0',
MON: '1',
TUE: '2',
WED: '3',
THU: '4',
FRI: '5',
SAT: '6'
}
const weekdays = Object.keys(weekdayToNums)
const parts = cron.split(' ')
const dayOfWeek = parts.pop()
Eif (!weekdays.includes(dayOfWeek!)) {
return cron
}
return parts.concat(weekdayToNums[dayOfWeek!]).join(' ')
}
export enum ACTIONS {
FREQUENCY,
MONTH,
DAY_OF_MONTH,
DAY_OF_WEEK,
HOURS
}
interface Action {
type: ACTIONS
data: unknown
}
interface IState {
frequency: string // monthly, weekly, ..
month: number // Jan(1), Feb(2), ..
dayOfMonth: number // 1st(1), 2nd(2), ..
dayOfWeek: number // Mon(0), Tue(1), ...
hours: number // 12:00 AM (0), 5:30 PM (17.5), ..
}
const initialState: IState = {
frequency: 'week',
month: 1,
dayOfWeek: 1,
dayOfMonth: 1,
hours: 0
}
const reducer = (state: IState, action: Action) => {
const { type, data } = action
switch (type) {
case ACTIONS.FREQUENCY:
return {
...state,
...initialState, // reset other values
frequency: data as string
}
case ACTIONS.DAY_OF_WEEK:
return { ...state, dayOfWeek: data as number }
case ACTIONS.HOURS:
return { ...state, hours: data as number }
case ACTIONS.DAY_OF_MONTH:
return { ...state, dayOfMonth: data as number }
case ACTIONS.MONTH:
return { ...state, month: data as number }
default:
return state
}
}
const getInitialState = (cron: string): IState => {
cron = replaceDayOfWeek(cron)
const frequency = getCronType(cron)
if (!cron || !frequency) {
return initialState
}
const c = cron.split(' ')
const mins = c[0],
hrs = +c[1],
dom = +c[2],
month = +c[3],
dow = +c[4]
return {
frequency,
month: month as unknown as number,
dayOfMonth: dom as unknown as number,
dayOfWeek: dow as unknown as number,
hours: mins === '30' ? hrs + 0.5 : hrs
}
}
interface useCronReturnType {
state: IState
dispatch: React.Dispatch<Action>
cron: string
}
export const useCron = (initialCron: string): useCronReturnType => {
const [state, dispatch] = useReducer(
reducer,
useMemo(() => getInitialState(initialCron), [])
)
const { frequency, month, dayOfWeek, dayOfMonth, hours } = state
let mins, hrs, day, mon, dow
mins = hrs = day = mon = '*'
dow = '?'
switch (frequency) {
case 'year':
mins = getMins(hours)
hrs = Math.floor(hours)
day = dayOfMonth
mon = month
break
case 'month':
mins = getMins(hours)
hrs = Math.floor(hours)
day = dayOfMonth
break
case 'week':
mins = getMins(hours)
hrs = Math.floor(hours)
dow = dayOfWeek
day = '?'
break
case 'day':
mins = getMins(hours)
hrs = Math.floor(hours)
break
default:
break
}
return {
state,
dispatch,
cron: [mins, hrs, day, mon, dow].join(' ')
}
}
interface CronProps {
onChange: (cron: string) => void
cron: string
}
const Cron = (props: CronProps) => {
const { getString } = useStrings()
const { state, dispatch, cron } = useCron(props.cron)
useEffect(() => {
props.onChange(cron)
}, [cron])
const handleChange = (actionType: ACTIONS, data: unknown) => {
dispatch({ type: actionType, data })
}
const MonthComp = (
<>
<Text inline>{getString('common.in')} </Text>
<Select
className={css.selectBox}
value={MONTH_OPTIONS.find(op => op.value === state.month)}
onChange={({ value }) => handleChange(ACTIONS.MONTH, value)}
items={MONTH_OPTIONS}
/>
</>
)
const DaysOfMonthComp = (
<>
<Text inline>{getString('common.on')} </Text>
<Select
className={css.selectBox}
value={DAYS_OF_MONTH_OPTIONS.find(op => op.value === state.dayOfMonth)}
onChange={({ value }) => handleChange(ACTIONS.DAY_OF_MONTH, value)}
items={DAYS_OF_MONTH_OPTIONS}
/>
</>
)
const DaysOfWeekComp = (
<>
<Text inline>{getString('common.on')} </Text>
<Select
className={css.selectBox}
value={DAYS_OF_WEEK_OPTIONS.find(op => op.value === state.dayOfWeek)}
onChange={({ value }) => handleChange(ACTIONS.DAY_OF_WEEK, value)}
items={DAYS_OF_WEEK_OPTIONS}
/>
</>
)
const HoursComp = (
<>
<Text inline>{getString('common.at')} </Text>
<Select
className={css.selectBox}
value={HOUR_OPTIONS.find(op => op.value === state.hours)}
items={HOUR_OPTIONS}
onChange={({ value }) => handleChange(ACTIONS.HOURS, value)}
/>
</>
)
const frequencyToComponents: Record<string, React.ReactNode[]> = {
year: [MonthComp, DaysOfMonthComp, HoursComp],
month: [DaysOfMonthComp, HoursComp],
week: [DaysOfWeekComp, HoursComp],
day: [HoursComp]
}
const comps = frequencyToComponents[state.frequency] || [DaysOfWeekComp, HoursComp]
return (
<Container className={css.cron}>
<Select
value={FREQUENCY_OPTIONS.find(op => op.value === state.frequency)}
onChange={({ value }) => handleChange(ACTIONS.FREQUENCY, value)}
items={FREQUENCY_OPTIONS}
/>
<div className={css.comps}>{comps.map(comp => comp)}</div>
</Container>
)
}
export default Cron
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