Bacon.Clock

clock.js

var Bacon = require('baconjs');
var pad = require('./pad');

module.exports = function(interval) {
  interval = interval || 500;
 
  var get = {
    date:   function(event) { return new Date(); },
    hour:   function(date) { return date.getHours(); },
    minute: function(date) { return date.getMinutes(); },
    second: function(date) { return date.getSeconds(); },      
    day:    function(date) { return date.getDate(); },
    month:  function(date) { return date.getMonth() + 1; },
    year:   function(date) { return date.getFullYear(); }
  }
 
  var format = {
    date: function(day, month, year, delimiter) {
      return month + delimiter + day + delimiter + year; // 9/22/2014
    },
    time: function(hours, minutes, seconds, delimiter) {
        return hours + delimiter + pad.zero(minutes) + delimiter + pad.zero(seconds); // 14:25:00
    }
  };
 
  var delimiter = {
    time: Bacon.interval(1000).scan(":", function(val) { return (val === ":" ? " " : ":"); }),
    date: Bacon.constant('/')
  };
 
  var clock   = Bacon.fromPoll(interval, get.date).toProperty(get.date());
 
  var hours   = clock.map(get.hour).toProperty().skipDuplicates();
  var minutes = clock.map(get.minute).toProperty().skipDuplicates();
  var seconds = clock.map(get.second).toProperty().skipDuplicates();
  
  var day     = clock.map(get.day).toProperty().skipDuplicates();
  var month   = clock.map(get.month).toProperty().skipDuplicates();
  var year    = clock.map(get.year).toProperty().skipDuplicates();
 
  var date    = Bacon.combineWith(format.date, day, month, year, delimiter.date);
  var time    = Bacon.combineWith(format.time, hours, minutes, seconds, delimiter.time);
 
  return {
    clock: clock,
    hours: hours,
    minutes: minutes,
    seconds: seconds,
    day: day,
    month: month,
    year: year,
    date: date,
    time: time
  };
}

main.js

var clock = require('./clock')(500);

$(function(){
  clock.date.assign($('.clock .date'), 'text');
  clock.time.assign($('.clock .time'), 'text');
});

pad.js

var pad = function(n, p) {
  return n < 10 ? p.toString() + n : n;
};

pad.zero = function(n) {
  return pad(n, 0);
};

module.export = pad;