Convert string representation of date and time to a timestamp
Example 1function strtotime(str, now) {
// Convert string representation of date and time to a timestamp
//
// version: 902.2516
// discuss at: http://phpjs.org/functions/strtotime
// + original by: Caio Ariede (http://caioariede.com)
// + improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
// + input by: David
// + improved by: Caio Ariede (http://caioariede.com)
// % note 1: Examples all have a fixed timestamp to prevent tests to fail because of variable time(zones)
// * example 1: strtotime('+1 day', 1129633200);
// * returns 1: 1129719600
// * example 2: strtotime('+1 week 2 days 4 hours 2 seconds', 1129633200);
// * returns 2: 1130425202
// * example 3: strtotime('last month', 1129633200);
// * returns 3: 1127041200
// * example 4: strtotime('2009-05-04 08:30:00');
// * returns 4: 1241418600
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();
} else if (!isNaN(parse = Date.parse(strTmp))) {
return parse/1000;
} else if (now) {
now = new Date(now);
} else {
now = new Date();
}
strTmp = strTmp.toLowerCase();
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]);
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;
}
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
}
}
match = strTmp.match(/^(\d{2,4}-\d{2}-\d{2})(\s\d{1,2}:\d{1,2}(:\d{1,2})?)?$/);
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;
}
}
return strtotime(s[2] + ' ' + s[1] + ' ' + s[0] + ' ' + match[2]);
}
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, 'g'));
if (match == null) {
return false;
}
for (i in match) {
if (!process(match[i].split(' '))) {
return false;
}
}
return (now);
}
