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Javascript Humane Dates
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/* | |
* Javascript Humane Dates | |
* Copyright (c) 2008 Dean Landolt (deanlandolt.com) | |
* Re-write by Zach Leatherman (zachleat.com) | |
*/ | |
/* Adopted from the John Resig's pretty.js | |
* at http://ejohn.org/blog/javascript-pretty-date | |
* and henrah's proposed modification | |
* at http://ejohn.org/blog/javascript-pretty-date/#comment-297458 | |
*/ | |
/* Licensed under the MIT license. | |
*/ | |
function humane_date(date_str){ | |
var time_formats = [ | |
[60, 'just now'], | |
[90, '1 minute'], // 60*1.5 | |
[3600, 'minutes', 60], // 60*60, 60 | |
[5400, '1 hour'], // 60*60*1.5 | |
[86400, 'hours', 3600], // 60*60*24, 60*60 | |
[129600, '1 day'], // 60*60*24*1.5 | |
[604800, 'days', 86400], // 60*60*24*7, 60*60*24 | |
[907200, '1 week'], // 60*60*24*7*1.5 | |
[2628000, 'weeks', 604800], // 60*60*24*(365/12), 60*60*24*7 | |
[3942000, '1 month'], // 60*60*24*(365/12)*1.5 | |
[31536000, 'months', 2628000], // 60*60*24*365, 60*60*24*(365/12) | |
[47304000, '1 year'], // 60*60*24*365*1.5 | |
[3153600000, 'years', 31536000], // 60*60*24*365*100, 60*60*24*365 | |
[4730400000, '1 century'] // 60*60*24*365*100*1.5 | |
]; | |
var time = ('' + date_str).replace(/-/g,"/").replace(/[TZ]/g," "), | |
dt = new Date, | |
seconds = ((dt - new Date(time) + (dt.getTimezoneOffset() * 60000)) / 1000), | |
token = ' ago', | |
i = 0, | |
format; | |
if (seconds < 0) { | |
seconds = Math.abs(seconds); | |
token = ''; | |
} | |
while (format = time_formats[i++]) { | |
if (seconds < format[0]) { | |
if (format.length == 2) { | |
return format[1] + (i > 1 ? token : ''); // Conditional so we don't return Just Now Ago | |
} else { | |
return Math.round(seconds / format[2]) + ' ' + format[1] + (i > 1 ? token : ''); | |
} | |
} | |
} | |
// overflow for centuries | |
if(seconds > 4730400000) | |
return Math.round(seconds / 4730400000) + ' centuries' + token; | |
return date_str; | |
}; | |
if(typeof jQuery != 'undefined') { | |
jQuery.fn.humane_dates = function(){ | |
return this.each(function(){ | |
var date = humane_date(this.title); | |
if(date && jQuery(this).text() != date) // don't modify the dom if we don't have to | |
jQuery(this).text(date); | |
}); | |
}; | |
} |
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