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/*
*/
var moment = require('moment');
var Parser = require('../parser').Parser;
var ParsedResult = require('../../result').ParsedResult;
var util = require('../../utils/EN');
var PATTERN = new RegExp('(\\W|^)' +
'(this|next|last|past)\\s*' +
'('+ util.INTEGER_WORDS_PATTERN + '|[0-9]+|few|half(?:\\s*an?)?)?\\s*' +
'(seconds?|min(?:ute)?s?|hours?|days?|weeks?|months?|years?)(?=\\s*)' +
'(?=\\W|$)', 'i'
);
var MODIFIER_WORD_GROUP = 2;
var MULTIPLIER_WORD_GROUP = 3;
var RELATIVE_WORD_GROUP = 4;
exports.Parser = function ENRelativeDateFormatParser(){
Parser.apply(this, arguments);
this.pattern = function() { return PATTERN; };
this.extract = function(text, ref, match, opt){
var index = match.index + match[1].length;
var modifier = match[MODIFIER_WORD_GROUP].toLowerCase().match(/^next/) ? 1 : -1;
var text = match[0];
text = match[0].substr(match[1].length, match[0].length - match[1].length);
var result = new ParsedResult({
index: index,
text: text,
ref: ref
});
result.tags['ENRelativeDateFormatParser'] = true;
var num = match[MULTIPLIER_WORD_GROUP] === undefined ? '' : match[3].toLowerCase();
if (util.INTEGER_WORDS[num] !== undefined) {
num = util.INTEGER_WORDS[num];
} else if (num === ''){
num = 1;
} else if (num.match(/few/i)){
num = 3;
} else if (num.match(/half/i)) {
num = 0.5;
} else {
num = parseInt(num);
}
num *= modifier;
var date = moment(ref);
if (match[MODIFIER_WORD_GROUP].toLowerCase().match(/^this/)) {
if (match[MULTIPLIER_WORD_GROUP]) {
return null;
}
if (match[RELATIVE_WORD_GROUP].match(/day|week|month|year/i)) {
// This week
if (match[RELATIVE_WORD_GROUP].match(/week/i)) {
date.add(-date.get('d'), 'd');
result.start.imply('day', date.date());
result.start.imply('month', date.month() + 1);
result.start.imply('year', date.year());
}
// This month
else if (match[RELATIVE_WORD_GROUP].match(/month/i)) {
date.add(-date.date() + 1, 'd');
result.start.imply('day', date.date());
result.start.assign('year', date.year());
result.start.assign('month', date.month() + 1);
}
// This year
else if (match[RELATIVE_WORD_GROUP].match(/year/i)) {
date.add(-date.date() + 1, 'd');
date.add(-date.month(), 'month');
result.start.imply('day', date.date());
result.start.imply('month', date.month() + 1);
result.start.assign('year', date.year());
}
return result;
}
}
if (match[RELATIVE_WORD_GROUP].match(/day|week|month|year/i)) {
if (match[RELATIVE_WORD_GROUP].match(/day/i)) {
date.add(num, 'd');
result.start.assign('year', date.year());
result.start.assign('month', date.month() + 1);
result.start.assign('day', date.date());
} else if (match[RELATIVE_WORD_GROUP].match(/week/i)) {
date.add(num * 7, 'd');
// We don't know the exact date for next/last week so we imply
// them
result.start.imply('day', date.date());
result.start.imply('month', date.month() + 1);
result.start.imply('year', date.year());
} else if (match[RELATIVE_WORD_GROUP].match(/month/i)) {
date.add(num, 'month');
// We don't know the exact day for next/last month
result.start.imply('day', date.date());
result.start.assign('year', date.year());
result.start.assign('month', date.month() + 1);
} else if (match[RELATIVE_WORD_GROUP].match(/year/i)) {
date.add(num, 'year');
// We don't know the exact day for month on next/last year
result.start.imply('day', date.date());
result.start.imply('month', date.month() + 1);
result.start.assign('year', date.year());
}
return result;
}
if (match[RELATIVE_WORD_GROUP].match(/hour/i)) {
date.add(num, 'hour');
result.start.imply('minute', date.minute());
result.start.imply('second', date.second());
} else if (match[RELATIVE_WORD_GROUP].match(/min/i)) {
date.add(num, 'minute');
result.start.assign('minute', date.minute());
result.start.imply('second', date.second());
} else if (match[RELATIVE_WORD_GROUP].match(/second/i)) {
date.add(num, 'second');
result.start.assign('second', date.second());
result.start.assign('minute', date.minute());
}
result.start.assign('hour', date.hour());
result.start.assign('year', date.year());
result.start.assign('month', date.month() + 1);
result.start.assign('day', date.date());
return result;
};
};
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