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// Causes html elements in the 'relativedate' class to be displayed
// as relative dates. The date is parsed from the title attribute, or from
// the element content.
var dateElements;
hook("onload", getDates);
function getDates() {
dateElements = getElementsByClass('relativedate');
for (var i = 0; i < dateElements.length; i++) {
var elt = dateElements[i];
var title = elt.attributes.title;
var d = new Date(title ? title.value : elt.innerHTML);
if (! isNaN(d)) {
dateElements[i].date=d;
elt.title=elt.innerHTML;
}
}
showDates();
}
function showDates() {
for (var i = 0; i < dateElements.length; i++) {
var elt = dateElements[i];
var d = elt.date;
if (! isNaN(d)) {
elt.innerHTML=relativeDate(d);
}
}
setTimeout(showDates,30000); // keep updating every 30s
}
var timeUnits = new Array;
timeUnits['minute'] = 60;
timeUnits['hour'] = timeUnits['minute'] * 60;
timeUnits['day'] = timeUnits['hour'] * 24;
timeUnits['month'] = timeUnits['day'] * 30;
timeUnits['year'] = timeUnits['day'] * 364;
var timeUnitOrder = ['year', 'month', 'day', 'hour', 'minute'];
function relativeDate(date) {
var now = new Date();
var offset = date.getTime() - now.getTime();
var seconds = Math.round(Math.abs(offset) / 1000);
var ret = "";
var shown = 0;
for (i = 0; i < timeUnitOrder.length; i++) {
var unit = timeUnitOrder[i];
if (seconds >= timeUnits[unit]) {
var num = Math.floor(seconds / timeUnits[unit]);
seconds -= num * timeUnits[unit];
if (ret)
ret += "and ";
ret += num + " " + unit + (num > 1 ? "s" : "") + " ";
if (++shown == 2)
break;
}
else if (shown)
break;
}
if (! ret)
ret = "less than a minute "
return ret + (offset < 0 ? "ago" : "from now");
}
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