/**
 * Convert string representation of date and time to a timestamp
 * @param str
 * @param now
 * @return
 */
function strtotime(str, now) {
	var i, match, s, strTmp = '', parse = '';

	strTmp = str;
	strTmp = strTmp.replace(/\s{2,}|^\s|\s$/g, ' '); // unecessary spaces
	strTmp = strTmp.replace(/[\t\r\n]/g, ''); // unecessary chars

	if (strTmp == 'now') {
		return (new Date()).getTime() / 1000; // Return seconds, not
												// milli-seconds
	} else if (!isNaN(parse = Date.parse(strTmp))) {
		return (parse / 1000);
	} else if (now) {
		now = new Date(now * 1000); // Accept PHP-style seconds
	} else {
		now = new Date();
	}

	strTmp = strTmp.toLowerCase();

	var __is = {
		day : {
			'sun' : 0,
			'mon' : 1,
			'tue' : 2,
			'wed' : 3,
			'thu' : 4,
			'fri' : 5,
			'sat' : 6
		},
		mon : {
			'jan' : 0,
			'feb' : 1,
			'mar' : 2,
			'apr' : 3,
			'may' : 4,
			'jun' : 5,
			'jul' : 6,
			'aug' : 7,
			'sep' : 8,
			'oct' : 9,
			'nov' : 10,
			'dec' : 11
		}
	};

	var process = function(m) {
		var ago = (m[2] && m[2] == 'ago');
		var num = (num = m[0] == 'last' ? -1 : 1) * (ago ? -1 : 1);

		switch (m[0]) {
		case 'last':
		case 'next':
			switch (m[1].substring(0, 3)) {
			case 'yea':
				now.setFullYear(now.getFullYear() + num);
				break;
			case 'mon':
				now.setMonth(now.getMonth() + num);
				break;
			case 'wee':
				now.setDate(now.getDate() + (num * 7));
				break;
			case 'day':
				now.setDate(now.getDate() + num);
				break;
			case 'hou':
				now.setHours(now.getHours() + num);
				break;
			case 'min':
				now.setMinutes(now.getMinutes() + num);
				break;
			case 'sec':
				now.setSeconds(now.getSeconds() + num);
				break;
			default:
				var day;
				if (typeof (day = __is.day[m[1].substring(0, 3)]) != 'undefined') {
					var diff = day - now.getDay();
					if (diff == 0) {
						diff = 7 * num;
					} else if (diff > 0) {
						if (m[0] == 'last') {
							diff -= 7;
						}
					} else {
						if (m[0] == 'next') {
							diff += 7;
						}
					}
					now.setDate(now.getDate() + diff);
				}
			}
			break;

		default:
			if (/\d+/.test(m[0])) {
				num *= parseInt(m[0], 10);

				switch (m[1].substring(0, 3)) {
				case 'yea':
					now.setFullYear(now.getFullYear() + num);
					break;
				case 'mon':
					now.setMonth(now.getMonth() + num);
					break;
				case 'wee':
					now.setDate(now.getDate() + (num * 7));
					break;
				case 'day':
					now.setDate(now.getDate() + num);
					break;
				case 'hou':
					now.setHours(now.getHours() + num);
					break;
				case 'min':
					now.setMinutes(now.getMinutes() + num);
					break;
				case 'sec':
					now.setSeconds(now.getSeconds() + num);
					break;
				}
			} else {
				return false;
			}
			break;
		}
		return true;
	};

	match = strTmp
			.match(/^(\d{2,4}-\d{2}-\d{2})(?:\s(\d{1,2}:\d{2}(:\d{2})?)?(?:\.(\d+))?)?$/);
	if (match != null) {
		if (!match[2]) {
			match[2] = '00:00:00';
		} else if (!match[3]) {
			match[2] += ':00';
		}

		s = match[1].split(/-/g);

		for (i in __is.mon) {
			if (__is.mon[i] == s[1] - 1) {
				s[1] = i;
			}
		}
		s[0] = parseInt(s[0], 10);

		s[0] = (s[0] >= 0 && s[0] <= 69) ? '20' + (s[0] < 10 ? '0' + s[0]
				: s[0] + '') : (s[0] >= 70 && s[0] <= 99) ? '19' + s[0]
				: s[0] + '';
		return parseInt(this.strtotime(s[2] + ' ' + s[1] + ' ' + s[0] + ' '
				+ match[2])
				+ (match[4] ? match[4] / 1000 : ''), 10);
	}

	var regex = '([+-]?\\d+\\s'
			+ '(years?|months?|weeks?|days?|hours?|min|minutes?|sec|seconds?'
			+ '|sun\\.?|sunday|mon\\.?|monday|tue\\.?|tuesday|wed\\.?|wednesday'
			+ '|thu\\.?|thursday|fri\\.?|friday|sat\\.?|saturday)'
			+ '|(last|next)\\s'
			+ '(years?|months?|weeks?|days?|hours?|min|minutes?|sec|seconds?'
			+ '|sun\\.?|sunday|mon\\.?|monday|tue\\.?|tuesday|wed\\.?|wednesday'
			+ '|thu\\.?|thursday|fri\\.?|friday|sat\\.?|saturday))'
			+ '(\\sago)?';

	match = strTmp.match(new RegExp(regex, 'gi')); // Brett: seems should be
													// case insensitive per
													// docs, so added 'i'
	if (match == null) {
		return false;
	}

	for (i = 0; i < match.length; i++) {
		if (!process(match[i].split(' '))) {
			return false;
		}
	}

	return (now.getTime() / 1000);
}

/**
 * Return current UNIX timestamp  
 * @return
 */
function time () {    
    return Math.floor(new Date().getTime()/1000);
}