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/* | |
To make this trick work, I embed the time stamp for a given entry in the DOM as a custom attribute that I can query for conversion like this: | |
<li> | |
<span time="Feb 05, 2009 15:30:00 GMT">09:30 AM CST (15:30 GMT)</span> / | |
The aliens came out of no where and took Basecamp! | |
We're trying to hunt them down now. Stay tuned while we bring the lasers online. | |
</li> | |
I only want to convert the entries from today into relative time. The entries from yesterday and before should just use the specific time-only style. This means looking for just the span’s inside li’s from the ul with the class “today”. They’re then converted when the document is loaded with this function: | |
convert_all_times_from_today_to_words: function() { | |
$$('.today li span').each(function(e) { | |
e.innerHTML = this.time_ago_in_words_with_parsing(e.getAttribute('time')); | |
}, this); | |
} | |
The function uses a simple DateHelper JavaScript class that mimicks the DateHelper in Rails. | |
*/ | |
var DateHelper = { | |
// Takes the format of "Jan 15, 2007 15:45:00 GMT" and converts it to a relative time | |
// Ruby strftime: %b %d, %Y %H:%M:%S GMT | |
time_ago_in_words_with_parsing: function(from) { | |
var date = new Date; | |
date.setTime(Date.parse(from)); | |
return this.time_ago_in_words(date); | |
}, | |
time_ago_in_words: function(from) { | |
return this.distance_of_time_in_words(new Date, from); | |
}, | |
distance_of_time_in_words: function(to, from) { | |
var distance_in_seconds = ((to - from) / 1000); | |
var distance_in_minutes = (distance_in_seconds / 60).floor(); | |
if (distance_in_minutes == 0) { return 'less than a minute ago'; } | |
if (distance_in_minutes == 1) { return 'a minute ago'; } | |
if (distance_in_minutes < 45) { return distance_in_minutes + ' minutes ago'; } | |
if (distance_in_minutes < 90) { return 'about 1 hour ago'; } | |
if (distance_in_minutes < 1440) { return 'about ' + (distance_in_minutes / 60).floor() + ' hours ago'; } | |
if (distance_in_minutes < 2880) { return '1 day ago'; } | |
if (distance_in_minutes < 43200) { return (distance_in_minutes / 1440).floor() + ' days ago'; } | |
if (distance_in_minutes < 86400) { return 'about 1 month ago'; } | |
if (distance_in_minutes < 525960) { return (distance_in_minutes / 43200).floor() + ' months ago'; } | |
if (distance_in_minutes < 1051199) { return 'about 1 year ago'; } | |
return 'over ' + (distance_in_minutes / 525960).floor() + ' years ago'; | |
} | |
}; |
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