react-native-paper-dates/lib/module/Date/inputUtils.js

Performant Date Picker for React Native Paper

"use strict";

import { useInputFormat, useInputFormatter, useRangeChecker } from './dateUtils';
import { getTranslation } from '../translations/utils';
import { useState } from 'react';
export default function useDateInput({
  locale,
  value,
  validRange,
  inputMode,
  onChange,
  onValidationError
}) {
  const formatter = useInputFormatter({
    locale
  });
  const inputFormat = useInputFormat({
    formatter,
    locale
  });
  const formattedValue = value ? formatter.format(value) : '';
  const [error, setError] = useState(null);
  const {
    isDisabled,
    isWithinValidRange,
    validStart,
    validEnd
  } = useRangeChecker(validRange);
  const onChangeText = date => {
    const dayIndex = inputFormat.indexOf('DD');
    const monthIndex = inputFormat.indexOf('MM');
    const yearIndex = locale === 'pt' ? inputFormat.indexOf('AAAA') : inputFormat.indexOf('YYYY');
    const day = Number(date.slice(dayIndex, dayIndex + 2));
    const year = Number(date.slice(yearIndex, yearIndex + 4));
    const month = Number(date.slice(monthIndex, monthIndex + 2));
    if (Number.isNaN(day) || Number.isNaN(year) || Number.isNaN(month)) {
      const inputError = getTranslation(locale, 'notAccordingToDateFormat', () => 'notAccordingToDateFormat')(inputFormat);
      setError(inputError);
      onValidationError && onValidationError(inputError);
      return;
    }
    const finalDate = inputMode === 'end' ? new Date(year, month - 1, day, 23, 59, 59) : new Date(year, month - 1, day);
    if (isDisabled(finalDate)) {
      const inputError = getTranslation(locale, 'dateIsDisabled');
      setError(inputError);
      onValidationError && onValidationError(inputError);
      return;
    }
    if (!isWithinValidRange(finalDate)) {
      let errors = validStart && validEnd ? [`${getTranslation(locale, 'mustBeBetween', () => 'mustBeBetween')(formatter.format(validStart), formatter.format(validEnd))}`] : [validStart ? getTranslation(locale, 'mustBeHigherThan', () => 'mustBeHigherThan')(formatter.format(validStart)) : '', validEnd ? getTranslation(locale, 'mustBeLowerThan', () => 'mustBeLowerThan')(formatter.format(validEnd)) : ''];
      const inputError = errors.filter(n => n).join(' ');
      setError(errors.filter(n => n).join(' '));
      onValidationError && onValidationError(inputError);
      return;
    }
    setError(null);
    onValidationError && onValidationError(null);
    if (inputMode === 'end') {
      onChange(finalDate);
    } else {
      onChange(finalDate);
    }
  };
  return {
    onChange,
    error,
    formattedValue,
    onChangeText,
    inputFormat
  };
}
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