chrono-node/dist/esm/locales/en/parsers/ENYearMonthDayParser.js

A natural language date parser in Javascript

import { MONTH_DICTIONARY } from "../constants.js";
import { matchAnyPattern } from "../../../utils/pattern.js";
import { AbstractParserWithWordBoundaryChecking } from "../../../common/parsers/AbstractParserWithWordBoundary.js";
const PATTERN = new RegExp(`([0-9]{4})[-\\.\\/\\s]` +
    `(?:(${matchAnyPattern(MONTH_DICTIONARY)})|([0-9]{1,2}))[-\\.\\/\\s]` +
    `([0-9]{1,2})` +
    "(?=\\W|$)", "i");
const YEAR_NUMBER_GROUP = 1;
const MONTH_NAME_GROUP = 2;
const MONTH_NUMBER_GROUP = 3;
const DATE_NUMBER_GROUP = 4;
export default class ENYearMonthDayParser extends AbstractParserWithWordBoundaryChecking {
    constructor(strictMonthDateOrder) {
        super();
        this.strictMonthDateOrder = strictMonthDateOrder;
    }
    innerPattern() {
        return PATTERN;
    }
    innerExtract(context, match) {
        const year = parseInt(match[YEAR_NUMBER_GROUP]);
        let day = parseInt(match[DATE_NUMBER_GROUP]);
        let month = match[MONTH_NUMBER_GROUP]
            ? parseInt(match[MONTH_NUMBER_GROUP])
            : MONTH_DICTIONARY[match[MONTH_NAME_GROUP].toLowerCase()];
        if (month < 1 || month > 12) {
            if (this.strictMonthDateOrder) {
                return null;
            }
            if (day >= 1 && day <= 12) {
                [month, day] = [day, month];
            }
        }
        if (day < 1 || day > 31) {
            return null;
        }
        return {
            day: day,
            month: month,
            year: year,
        };
    }
}
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