Simple Calendar

calendar.js

Calendar = Class.create({
  MONTHS      : ["gennaio", "febbraio", "marzo", "aprile", "maggio", "giugno", "luglio", "agosto", "settembre", "ottobre", "novembre", "dicembre"],
  DAYS        : ["dom", "lun", "mar", "mer", "gio", "ven", "sab"],
  MONTH_DAYS  : [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31],

  year          : null,
  month         : null,
  specialDates  : null,
  
  initialize : function(_special) {
    var _today  = new Date()
    this.year   = 1900 + _today.getYear()
    this.month  = _today.getMonth()
    this.specialDates = $A(_special)
  },
  
  getCurrentMonth : function() {
    var _days = this.MONTH_DAYS[this.month]
    var _date = new Date(this.year, this.month, 1)
    var _day  = _date.getDay()
    var _days = $A()
    
    for (var _i=0; _i<_day; _i++) {
      _days.push(null)
    }
    for (var _i=1; _i<=this.MONTH_DAYS[this.month]; _i++) {
      _days.push(_i)
    }
    for (var _i=this.MONTH_DAYS[this.month] + _day; _i<35; _i++) {
      _days.push(null)
    }
    return _days
  },
  
  goToNextMonth : function() {
    this.month += 1
    if (this.month > 11) {
      this.month = 0
      this.year += 1
    }
    this.adjustForLeapYear()
  },
  
  goToPrevMonth : function() {
    this.month -= 1
    if (this.month < 0) {
      this.month = 11
      this.year -= 1
    }
    this.adjustForLeapYear()
  },
  
  adjustForLeapYear : function() {
    if (this.year % 4 == 0 && !(this.year % 100 == 0 && this.year % 400 != 0))
      this.MONTH_DAYS[1] = 29
    else
      this.MONTH_DAYS[1] = 28
  },
  
  display: function() {
    console.log('DOM LUN MAR MER GIO VEN SAB')
    this.getCurrentMonth().inGroupsOf(7).each(function(week) {
      var _s = ''
      week.each(function(day) {
        if (day == null) {
          _s += '   '
        } else {
          if (this.isSpecial(day))
            _s += '*'
          else
            _s += ' '
          _s += day
          if (day < 10)
            _s += ' '
        }
        _s += ' '
      }, this)
      console.log(_s)
    }, this)
  },
  
  isSpecial : function(day) {
    return this.specialDates.any(function(s) {
      return (1900 + s.getYear()) == this.year && s.getMonth() == this.month && s.getDate() == day
    }, this)
  }
})

c = new Calendar([new Date()])
c.display()