node-nlp/examples/microsoft-bot/node_modules/chrono-node/src/parsers/FR/FRWeekdayParser.js

Library for NLU (Natural Language Understanding) done in Node.js

/*


*/
var moment = require('moment');
var Parser = require('../parser').Parser;
var ParsedResult = require('../../result').ParsedResult;
var updateParsedComponent = require('../EN/ENWeekdayParser').updateParsedComponent;

var DAYS_OFFSET = { 'dimanche': 0, 'dim': 0, 'lundi': 1, 'lun': 1,'mardi': 2, 'mar':2, 'mercredi': 3, 'mer': 3,
    'jeudi': 4, 'jeu':4, 'vendredi': 5, 'ven': 5,'samedi': 6, 'sam': 6};

var PATTERN = new RegExp('(\\s|^)' +
    '(?:(?:\\,|\\(|\\（)\\s*)?' +
    '(?:(ce)\\s*)?' +
    '(' + Object.keys(DAYS_OFFSET).join('|') + ')' +
    '(?:\\s*(?:\\,|\\)|\\）))?' +
    '(?:\\s*(dernier|prochain)\\s*)?' +
    '(?=\\W|$)', 'i');

var PREFIX_GROUP = 2;
var WEEKDAY_GROUP = 3;
var POSTFIX_GROUP = 4;

exports.Parser = function FRWeekdayParser() {
    Parser.apply(this, arguments);

    this.pattern = function() { return PATTERN; };

    this.extract = function(text, ref, match, opt){
        var index = match.index + match[1].length;
        var text = match[0].substr(match[1].length, match[0].length - match[1].length);
        var result = new ParsedResult({
            index: index,
            text: text,
            ref: ref
        });

        var dayOfWeek = match[WEEKDAY_GROUP].toLowerCase();
        var offset = DAYS_OFFSET[dayOfWeek];
        if(offset === undefined) return null;

        var modifier = null;
        var prefix = match[PREFIX_GROUP];
        var postfix = match[POSTFIX_GROUP];
        if (prefix || postfix) {
            var norm = prefix || postfix;
            norm = norm.toLowerCase();

            if(norm == 'dernier') {
                modifier = 'last';
            } else if(norm == 'prochain') {
                modifier = 'next';
            } else if(norm== 'ce') {
                modifier = 'this';
            }
        }

        updateParsedComponent(result, ref, offset, modifier);
        result.tags['FRWeekdayParser'] = true;
        return result;
    }
};