94 lines
2.0 KiB
JavaScript
94 lines
2.0 KiB
JavaScript
function Ago(nodes, options) {
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if (!(nodes instanceof Array)) {
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options = nodes;
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nodes = undefined;
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}
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nodes = nodes || document.querySelectorAll("time");
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options = options || {};
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var default_opts = {
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interval: 10000, // 10 secs
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units: [
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["minute", 60],
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["hour", 3600],
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["day", 86400],
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["week", 604800],
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["month", 2592000],
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["year", 31536000]
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],
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date: function(node) {
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// works on HTML "time" nodes
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return new Date(node.dateTime);
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},
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format: function(time, unit) {
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if (!unit) {
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return "just now";
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}
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if (time < 0) {
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var tail = " ahead";
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} else {
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var tail = " ago";
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}
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return Math.abs(time) + " " + unit + tail;
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},
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plural: {
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minute: "minutes",
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hour: "hours",
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day: "days",
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week: "weeks",
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month: "months",
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year: "years"
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}
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};
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// override default options
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for (var key in default_opts) {
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options[key] = options[key] || default_opts[key];
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}
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var ago = function(node) {
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// use callback to get date
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var ago_date = options.date(node);
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// get seconds ago
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var ago_time = (new Date().getTime() - ago_date.getTime()) / 1000;
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var abs_time = Math.floor(Math.abs(ago_time));
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// find greatest unit
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var unit = null;
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var unit_time = null;
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for (var u in options.units) {
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var secs = options.units[u][1];
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if (abs_time >= secs) {
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unit = options.units[u][0];
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unit_time = secs;
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} else {
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break;
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}
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}
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if (unit_time !== null) {
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abs_time = Math.floor(abs_time/unit_time);
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// plural
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if (abs_time != 1) {
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unit = options.plural[unit];
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}
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}
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node.textContent = options.format(ago_time < 0 ? -abs_time : abs_time, unit);
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};
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var update_all = function() {
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for (var i = 0; i < nodes.length; i++) {
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ago(nodes[i]);
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}
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};
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update_all();
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setInterval(function() {
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update_all();
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}, options.interval);
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} |