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import { getDaysInMonth, isExists } from 'date-fns'
import { useTranslation } from 'next-i18next'
import DateSelect, {
DateSelectOnChangeEvent,
DateSelectOption,
} from './DateSelect'
import FieldSetLegend from './FieldSetLegend'
import InputErrorMessage from './InputErrorMessage'
export type DateSelectFieldOnChangeEvent = (dateString: string) => void
export interface DateSelectFieldProps {
errorMessage?: string
firstYear?: number
helpMessage?: string
id: string
label: string
lastYear?: number
onChange: DateSelectFieldOnChangeEvent
required?: boolean
textRequired?: string
value: string
}
interface DateSelectState {
dateString: string
dayValue: string
monthValue: string
yearValue: string
}
const DateSelectField = ({
errorMessage,
firstYear,
helpMessage,
id,
label,
lastYear,
onChange,
required,
textRequired,
value,
}: DateSelectFieldProps) => {
const { t } = useTranslation()
const [state, setState] = useState<DateSelectState & { changeCount: number }>(
{
dateString: '',
dayValue: '',
monthValue: '',
yearValue: '',
changeCount: 0, // HACK: Use this state as a dependency of the `useEffect` below so that `onChange` is called only when it should be.
},
)
const dateSelectErrorMessageId = `date-select-${id}-error`
const dateSelectHelpMessageId = `date-select-${id}-help`
const dateSelectWrapperId = `date-select-${id}`
const dateSelectLabelId = `date-select-${id}-label`
const getAriaDescribedby = () => {
const ariaDescribedby: string[] = []
Iif (errorMessage) ariaDescribedby.push(dateSelectErrorMessageId)
if (helpMessage) ariaDescribedby.push(dateSelectHelpMessageId)
return ariaDescribedby.length > 0 ? ariaDescribedby.join(' ') : undefined
}
const yearOptions = useMemo(() => {
const first = firstYear ?? 1900
const last = Math.max(first, lastYear ?? new Date().getFullYear())
const years = last - first + 1
return [...Array(years).keys()].reverse().map<DateSelectOption>((i) => {
const value = padZero(i + first, 4)
return { label: value, value }
})
}, [firstYear, lastYear])
const monthOptions = useMemo(() => {
return [...Array(12).keys()].map<DateSelectOption>((i) => {
const value = padZero(i + 1, 2)
return { label: t(`date-months.` + value), value }
})
}, [t])
const dayOptions = useMemo(() => {
const year = parseInt(state.yearValue)
const month = parseInt(state.monthValue)
const days = isExists(year, month - 1, 1)
? getDaysInMonth(new Date(year, month - 1))
: 31
return [...Array(days).keys()].map<DateSelectOption>((i) => {
const value = padZero(i + 1, 2)
return { label: value, value }
})
}, [state.monthValue, state.yearValue])
const handleOnDateSelectChange: DateSelectOnChangeEvent = useCallback(
(event, type) => {
const newValue = event.target.value
setState((curState) => {
const yearValue = type === 'year' ? newValue : curState.yearValue
const yearNumber = parseInt(yearValue)
const monthValue = type === 'month' ? newValue : curState.monthValue
const monthNumber = parseInt(monthValue)
// dayValue can be set if year or month is NaN OR if the year-month-day convert to an existing date
const day = type === 'day' ? newValue : curState.dayValue
const isDayExists =
isNaN(yearNumber) || isNaN(monthNumber)
? true
: isExists(yearNumber, monthNumber - 1, parseInt(day))
const dayValue = isDayExists ? day : ''
const dateString = toDateStringOrEmpty(yearValue, monthValue, dayValue)
return {
...curState,
yearValue,
monthValue,
dayValue,
dateString,
changeCount: curState.changeCount + 1, // `updateDate` changes `state.changeCount` so that `onChange` is triggered.
}
})
},
[],
)
// Sync from the state to the upper component through onChange when necessary.
const mountedRef = useRef(false)
useEffect(() => {
Eif (!mountedRef.current) {
return
}
onChange(state.dateString)
// eslint-disable-next-line react-hooks/exhaustive-deps
}, [state.changeCount])
useEffect(() => {
mountedRef.current = true
return () => {
mountedRef.current = false
}
}, [])
// Sync from the passed value to the state when necessary.
useEffect(() => {
if (state.dateString === value) {
return
}
const { year, month, day } = parseDateString(value)
setState((curState) => ({
yearValue: year,
monthValue: month,
dayValue: day,
dateString: value,
changeCount: curState.changeCount, // This method does not update `state.changeCount` so that `onChange` is not triggered.
}))
// eslint-disable-next-line react-hooks/exhaustive-deps
}, [value])
return (
<div className="mb-4" id={dateSelectWrapperId} data-testid={id}>
<fieldset>
<FieldSetLegend
id={dateSelectLabelId}
required={required}
label={label}
textRequired={textRequired}
/>
{errorMessage && (
<InputErrorMessage
id={dateSelectErrorMessageId}
message={errorMessage}
/>
)}
{helpMessage && (
<div
className="mb-1.5 max-w-prose text-base text-gray-600"
id={dateSelectHelpMessageId}
>
{helpMessage}
</div>
)}
<div className="flex flex-col space-y-2 sm:flex-row sm:space-x-2 sm:space-y-0">
<DateSelect
ariaDescribedby={getAriaDescribedby()}
dateSelectLabelId={dateSelectLabelId}
error={!!errorMessage}
id={`${id}-month`}
label={t('common:date-select-field.month')}
onChange={handleOnDateSelectChange}
options={monthOptions}
required={required}
type="month"
value={state.monthValue}
/>
<DateSelect
ariaDescribedby={getAriaDescribedby()}
dateSelectLabelId={dateSelectLabelId}
error={!!errorMessage}
id={`${id}-day`}
label={t('common:date-select-field.day')}
onChange={handleOnDateSelectChange}
options={dayOptions}
required={required}
type="day"
value={state.dayValue}
/>
<DateSelect
ariaDescribedby={getAriaDescribedby()}
dateSelectLabelId={dateSelectLabelId}
error={!!errorMessage}
id={`${id}-year`}
label={t('common:date-select-field.year')}
onChange={handleOnDateSelectChange}
options={yearOptions}
required={required}
type="year"
value={state.yearValue}
/>
</div>
</fieldset>
</div>
)
}
const toDateStringOrEmpty = (year: string, month: string, day: string) =>
year && month && day ? `${year}-${month}-${day}` : ''
const padZero = (value: number, maxLength: number): string => {
return value.toString().padStart(maxLength, '0')
}
const parseDateString = (
dateString: string,
): {
year: string
month: string
day: string
} => {
// ONE DAY OFF depending on YOUR timezone and current time.
// ref.: https://stackoverflow.com/a/31732581
const date = new Date(dateString.replace(/-/g, '/').replace(/T.+/, ''))
const year = date.getFullYear()
const month = date.getMonth() + 1
const day = date.getDate()
Eif (isNaN(year) || isNaN(month) || isNaN(day)) {
return { year: '', month: '', day: '' }
}
return {
year: padZero(year, 4),
month: padZero(month, 2),
day: padZero(day, 2),
}
}
export default DateSelectField
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