node-nlp
Version:
Library for NLU (Natural Language Understanding) done in Node.js
108 lines (87 loc) • 2.91 kB
JavaScript
/*
Date format with slash "/" (also "-" and ".") between numbers
- Tuesday 11/3/2015
- 11/3/2015
- 11/3
*/
var moment = require('moment');
var Parser = require('../parser').Parser;
var ParsedResult = require('../../result').ParsedResult;
var PATTERN = new RegExp('(\\W|^)' +
'(?:' +
'(?:am\\s*?)?' +
'((?:sonntag|so|montag|mo|dienstag|di|mittwoch|mi|donnerstag|do|freitag|fr|samstag|sa))' +
'\\s*\\,?\\s*' +
'(?:den\\s*)?' +
')?' +
'([0-3]{0,1}[0-9]{1})[\\/\\.\\-]([0-3]{0,1}[0-9]{1})' +
'(?:' +
'[\\/\\.\\-]' +
'([0-9]{4}\s*\,?\s*|[0-9]{2}\s*\,?\s*)' +
')?' +
'(\\W|$)', 'i');
var DAYS_OFFSET = {
'sonntag': 0, 'so': 0,
'montag': 1, 'mo': 1,
'dienstag': 2, 'di': 2,
'mittwoch': 3, 'mi': 3,
'donnerstag': 4, 'do': 4,
'freitag': 5, 'fr': 5,
'samstag': 6, 'sa': 6
};
var OPENNING_GROUP = 1;
var ENDING_GROUP = 6;
var WEEKDAY_GROUP = 2;
var DAY_GROUP = 3;
var MONTH_GROUP = 4;
var YEAR_GROUP = 5;
exports.Parser = function DESlashDateFormatParser(argument) {
Parser.apply(this, arguments);
this.pattern = function () { return PATTERN; };
this.extract = function(text, ref, match, opt){
if(match[OPENNING_GROUP] == '/' || match[ENDING_GROUP] == '/') {
// Long skip, if there is some overlapping like:
// XX[/YY/ZZ]
// [XX/YY/]ZZ
match.index += match[0].length
return;
}
var index = match.index + match[OPENNING_GROUP].length;
var text = match[0].substr(match[OPENNING_GROUP].length, match[0].length - match[ENDING_GROUP].length);
var result = new ParsedResult({
text: text,
index: index,
ref: ref,
});
if(text.match(/^\d\.\d$/)) return;
if(text.match(/^\d\.\d{1,2}\.\d{1,2}$/)) return;
// MM/dd -> OK
// MM.dd -> NG
if(!match[YEAR_GROUP] && match[0].indexOf('/') < 0) return;
var date = null;
var year = match[YEAR_GROUP] || moment(ref).year() + '';
var month = match[MONTH_GROUP];
var day = match[DAY_GROUP];
month = parseInt(month);
day = parseInt(day);
year = parseInt(year);
if (month < 1 || month > 12) return null;
if(day < 1 || day > 31) return null;
if(year < 100){
if (year > 50) {
year = year + 1900;
} else {
year = year + 2000;
}
}
result.start.assign('day', day);
result.start.assign('month', month);
result.start.assign('year', year);
//Day of week
if(match[WEEKDAY_GROUP]) {
result.start.assign('weekday', DAYS_OFFSET[match[WEEKDAY_GROUP].toLowerCase()]);
}
result.tags['DESlashDateFormatParser'] = true;
return result;
};
};