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Viewing file:     ENSlashDateFormatStartWithYearParser.js (1.7 KB)      -rw-r--r--

/*
    Date format with slash "/" between numbers like ENSlashDateFormatParser,
    but this parser expect year before month and date. 
    - YYYY/MM/DD
    - YYYY-MM-DD
    - YYYY.MM.DD
*/
const dayjs = require('dayjs');
var Parser = require('../parser').Parser;
var ParsedResult = require('../../result').ParsedResult;
var util  = require('../../utils/EN');

var PATTERN = new RegExp('(\\W|^)' 
            + '([0-9]{4})[\\-\\.\\/]'
            + '((?:' + util.MONTH_PATTERN + '|[0-9]{1,2}))[\\-\\.\\/]'
            + '([0-9]{1,2})'
            + '(?=\\W|$)', 'i');

var YEAR_NUMBER_GROUP = 2;
var MONTH_NUMBER_GROUP = 3;
var DATE_NUMBER_GROUP  = 4;

exports.Parser = function ENSlashDateFormatStartWithYearParser(){
    Parser.apply(this, arguments);
    
    this.pattern = function() { return PATTERN; }
    
    this.extract = function(text, ref, match, opt){

        var text = match[0].substr(match[1].length);
        var index = match.index + match[1].length;

        var result = new ParsedResult({
            text: text,
            index: index,
            ref: ref,
        })
        
        var month = match[MONTH_NUMBER_GROUP].toLowerCase();
        month = util.MONTH_OFFSET[month] | month;

        result.start.assign('year', parseInt(match[YEAR_NUMBER_GROUP]));
        result.start.assign('month', parseInt(month));
        result.start.assign('day', parseInt(match[DATE_NUMBER_GROUP]));

        if (
            dayjs(result.start.get('month')) > 12 || dayjs(result.start.get('month')) < 1 || 
            dayjs(result.start.get('day')) > 31 || dayjs(result.start.get('day')) < 1) {
            return null;
        }
        
        result.tags['ENDateFormatParser'] = true;
        return result;
    };
}