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+/*
+
+ The parser for parsing US's date format that begin with month's name.
+
+ EX.
+ - January 13
+ - January 13, 2012
+ - January 13 - 15, 2012
+ - Tuesday, January 13, 2012
+
+ Watch out for:
+ - January 12:00
+ - January 12.44
+ - January 1222344
+*/
+
+var moment = require('moment');
+
+var Parser = require('../parser').Parser;
+var ParsedResult = require('../../result').ParsedResult;
+var util = require('../../utils/EN');
+
+var PATTERN = new RegExp('(\\W|^)' +
+ '(?:' +
+ '(?:on\\s*?)?' +
+ '(Sunday|Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sun\\.?|Mon\\.?|Tue\\.?|Wed\\.?|Thu\\.?|Fri\\.?|Sat\\.?)' +
+ '\\s*,?\\s*)?' +
+ '(' + util.MONTH_PATTERN + ')' +
+ '(?:-|\/|\\s*,?\\s*)' +
+ '(([0-9]{1,2})(?:st|nd|rd|th)?|' + util.ORDINAL_WORDS_PATTERN +')(?!\\s*(?:am|pm))\\s*' + '' +
+ '(?:' +
+ '(?:to|\\-)\\s*' +
+ '(([0-9]{1,2})(?:st|nd|rd|th)?| ' + util.ORDINAL_WORDS_PATTERN + ')\\s*' +
+ ')?' +
+ '(?:' +
+ '(?:-|\/|\\s*,?\\s*)' +
+ '(?:([0-9]{4})\\s*(BE|AD|BC)?|([0-9]{1,4})\\s*(AD|BC))\\s*' +
+ ')?' +
+ '(?=\\W|$)(?!\\:\\d)', 'i');
+
+var WEEKDAY_GROUP = 2;
+var MONTH_NAME_GROUP = 3;
+var DATE_GROUP = 4;
+var DATE_NUM_GROUP = 5;
+var DATE_TO_GROUP = 6;
+var DATE_TO_NUM_GROUP = 7;
+var YEAR_GROUP = 8;
+var YEAR_BE_GROUP = 9;
+var YEAR_GROUP2 = 10;
+var YEAR_BE_GROUP2 = 11;
+
+exports.Parser = function ENMonthNameMiddleEndianParser(){
+ Parser.apply(this, arguments);
+
+ this.pattern = function() { return PATTERN; }
+
+ this.extract = function(text, ref, match, opt){
+
+ var result = new ParsedResult({
+ text: match[0].substr(match[1].length, match[0].length - match[1].length),
+ index: match.index + match[1].length,
+ ref: ref,
+ });
+
+
+ var month = match[MONTH_NAME_GROUP];
+ month = util.MONTH_OFFSET[month.toLowerCase()];
+ var day = match[DATE_NUM_GROUP] ?
+ parseInt(match[DATE_NUM_GROUP]) :
+ util.ORDINAL_WORDS[match[DATE_GROUP].trim().replace('-', ' ').toLowerCase()];
+
+ var year = null;
+ if (match[YEAR_GROUP] || match[YEAR_GROUP2]) {
+ year = match[YEAR_GROUP] || match[YEAR_GROUP2];
+ year = parseInt(year);
+
+ var yearBE = match[YEAR_BE_GROUP] || match[YEAR_BE_GROUP2];
+ if (yearBE) {
+ if (/BE/i.test(yearBE)) {
+ // Buddhist Era
+ year = year - 543;
+ } else if (/BC/i.test(yearBE)) {
+ // Before Christ
+ year = -year;
+ }
+ } else if (year < 100){
+
+ year = year + 2000;
+ }
+ }
+
+ if(year){
+ result.start.assign('day', day);
+ result.start.assign('month', month);
+ result.start.assign('year', year);
+ } else {
+
+ //Find the most appropriated year
+ var refMoment = moment(ref);
+ refMoment.month(month - 1);
+ refMoment.date(day);
+
+ var nextYear = refMoment.clone().add(1, 'y');
+ var lastYear = refMoment.clone().add(-1, 'y');
+ if( Math.abs(nextYear.diff(moment(ref))) < Math.abs(refMoment.diff(moment(ref))) ){
+ refMoment = nextYear;
+ }
+ else if( Math.abs(lastYear.diff(moment(ref))) < Math.abs(refMoment.diff(moment(ref))) ){
+ refMoment = lastYear;
+ }
+
+ result.start.assign('day', day);
+ result.start.assign('month', month);
+ result.start.imply('year', refMoment.year());
+ }
+
+ // Weekday component
+ if (match[WEEKDAY_GROUP]) {
+ var weekday = match[WEEKDAY_GROUP];
+ weekday = util.WEEKDAY_OFFSET[weekday.toLowerCase()]
+ result.start.assign('weekday', weekday);
+ }
+
+ // Text can be 'range' value. Such as 'January 12 - 13, 2012'
+ if (match[DATE_TO_GROUP]) {
+ var endDate = match[DATE_TO_NUM_GROUP] ?
+ endDate = parseInt(match[DATE_TO_NUM_GROUP]) :
+ util.ORDINAL_WORDS[match[DATE_TO_GROUP].replace('-', ' ').trim().toLowerCase()];
+
+ result.end = result.start.clone();
+ result.end.assign('day', endDate);
+ }
+
+ result.tags['ENMonthNameMiddleEndianParser'] = true;
+ return result;
+ }
+}; \ No newline at end of file