framework/js/lib/initializers/timestamps.js

import humanTime from 'flarum/utils/human-time';

export default function(app) {
  // perhaps get rid of this and just m.redraw every minute?

  // Livestamp.js / v1.1.2 / (c) 2012 Matt Bradley / MIT License
  // @todo rewrite this to be simpler and cleaner
  (function($, moment) {
    var updateInterval = 1e3,
        paused = false,
        $livestamps = $([]),

    init = function() {
      livestampGlobal.resume();
    },

    prep = function($el, timestamp) {
      var oldData = $el.data('livestampdata');
      if (typeof timestamp == 'number')
        timestamp *= 1e3;

      $el.removeAttr('data-humantime')
        .removeData('humantime');

      timestamp = moment(timestamp);
      if (moment().diff(timestamp) > 60 * 60) {
          return;
      }
      if (moment.isMoment(timestamp) && !isNaN(+timestamp)) {
        var newData = $.extend({ }, { 'original': $el.contents() }, oldData);
        newData.moment = moment(timestamp);

        $el.data('livestampdata', newData).empty();
        $livestamps.push($el[0]);
      }
    },

    run = function() {
      if (paused) return;
      livestampGlobal.update();
      setTimeout(run, updateInterval);
    },

    livestampGlobal = {
      update: function() {
        $('[data-humantime]').each(function() {
          var $this = $(this);
          prep($this, $this.attr('datetime'));
        });

        var toRemove = [];
        $livestamps.each(function() {
          var $this = $(this),
              data = $this.data('livestampdata');

          if (data === undefined)
            toRemove.push(this);
          else if (moment.isMoment(data.moment)) {
            var from = $this.html(),
              to = humanTime(data.moment);
                // to = data.moment.fromNow();

            if (from != to) {
              var e = $.Event('change.livestamp');
              $this.trigger(e, [from, to]);
              if (!e.isDefaultPrevented())
                $this.html(to);
            }
          }
        });

        $livestamps = $livestamps.not(toRemove);
      },

      pause: function() {
        paused = true;
      },

      resume: function() {
        paused = false;
        run();
      },

      interval: function(interval) {
        if (interval === undefined)
          return updateInterval;
        updateInterval = interval;
      }
    },

    livestampLocal = {
      add: function($el, timestamp) {
        if (typeof timestamp == 'number')
          timestamp *= 1e3;
        timestamp = moment(timestamp);

        if (moment.isMoment(timestamp) && !isNaN(+timestamp)) {
          $el.each(function() {
            prep($(this), timestamp);
          });
          livestampGlobal.update();
        }

        return $el;
      },

      destroy: function($el) {
        $livestamps = $livestamps.not($el);
        $el.each(function() {
          var $this = $(this),
              data = $this.data('livestampdata');

          if (data === undefined)
            return $el;

          $this
            .html(data.original ? data.original : '')
            .removeData('livestampdata');
        });

        return $el;
      },

      isLivestamp: function($el) {
        return $el.data('livestampdata') !== undefined;
      }
    };

    $.livestamp = livestampGlobal;
    $(init);
    $.fn.livestamp = function(method, options) {
      if (!livestampLocal[method]) {
        options = method;
        method = 'add';
      }

      return livestampLocal[method](this, options);
    };
  })(jQuery, moment);
}