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/*
*/
var moment = require('moment');
var Parser = require('../parser').Parser;
var ParsedResult = require('../../result').ParsedResult;
var util = require('../../utils/JP');
var PATTERN = /(?:(同|((昭和|平成)?([0-9０-９]{2,4})))年\s*)?([0-9０-９]{1,2})月\s*([0-9０-９]{1,2})日/i;
var YEAR_GROUP = 2;
var ERA_GROUP = 3;
var YEAR_NUMBER_GROUP = 4;
var MONTH_GROUP = 5;
var DAY_GROUP = 6;
exports.Parser = function JPStandardParser(){
Parser.apply(this, arguments);
this.pattern = function() { return PATTERN; }
this.extract = function(text, ref, match, opt){
var startMoment = moment(ref);
var result = new ParsedResult({
text: match[0],
index: match.index,
ref: ref,
});
var month = match[MONTH_GROUP];
month = util.toHankaku(month);
month = parseInt(month);
var day = match[DAY_GROUP];
day = util.toHankaku(day);
day = parseInt(day);
startMoment.set('date', day);
startMoment.set('month', month - 1);
result.start.assign('day', startMoment.date());
result.start.assign('month', startMoment.month() + 1);
if (!match[YEAR_GROUP]) {
//Find the most appropriated year
startMoment.year(moment(ref).year());
var nextYear = startMoment.clone().add(1, 'y');
var lastYear = startMoment.clone().add(-1, 'y');
if( Math.abs(nextYear.diff(moment(ref))) < Math.abs(startMoment.diff(moment(ref))) ){
startMoment = nextYear;
}
else if( Math.abs(lastYear.diff(moment(ref))) < Math.abs(startMoment.diff(moment(ref))) ){
startMoment = lastYear;
}
result.start.assign('day', startMoment.date());
result.start.assign('month', startMoment.month() + 1);
result.start.imply('year', startMoment.year());
} else if (match[YEAR_GROUP].match('同年')) {
result.start.assign('year', startMoment.year());
} else {
var year = match[YEAR_NUMBER_GROUP];
year = util.toHankaku(year);
year = parseInt(year);
if (match[ERA_GROUP] == '平成') {
year += 1988;
} else if (match[ERA_GROUP] == '昭和') {
year += 1925;
}
result.start.assign('year', year);
}
result.tags['JPStandardParser'] = true;
return result;
};
}
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