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web/javascript/calendarview.js  view on Meta::CPAN

Date.SECOND        = 1000 /* milliseconds */
Date.MINUTE        = 60 * Date.SECOND
Date.HOUR          = 60 * Date.MINUTE
Date.DAY           = 24 * Date.HOUR
Date.WEEK          =  7 * Date.DAY

// Parses Date
Date.parseDate = function(str, fmt) {
  var today = new Date();
  var y     = 0;
  var m     = -1;
  var d     = 0;
  var a     = str.split(/\W+/);
  var b     = fmt.match(/%./g);
  var i     = 0, j = 0;
  var hr    = 0;
  var min   = 0;

  for (i = 0; i < a.length; ++i) {
    if (!a[i]) continue;
    switch (b[i]) {
      case "%d":
      case "%e":
        d = parseInt(a[i], 10);
        break;
      case "%m":
        m = parseInt(a[i], 10) - 1;
        break;
      case "%Y":
      case "%y":
        y = parseInt(a[i], 10);
        (y < 100) && (y += (y > 29) ? 1900 : 2000);
        break;
      case "%b":
      case "%B":
        for (j = 0; j < 12; ++j) {
          if (Calendar.MONTH_NAMES[j].substr(0, a[i].length).toLowerCase() == a[i].toLowerCase()) {
            m = j;
            break;
          }
        }
        break;
      case "%H":
      case "%I":
      case "%k":
      case "%l":
        hr = parseInt(a[i], 10);
        break;
      case "%P":
      case "%p":
        if (/pm/i.test(a[i]) && hr < 12)
          hr += 12;
        else if (/am/i.test(a[i]) && hr >= 12)
          hr -= 12;
        break;
      case "%M":
        min = parseInt(a[i], 10);
        break;
    }
  }
  if (isNaN(y)) y = today.getFullYear();
  if (isNaN(m)) m = today.getMonth();
  if (isNaN(d)) d = today.getDate();
  if (isNaN(hr)) hr = today.getHours();
  if (isNaN(min)) min = today.getMinutes();
  if (y != 0 && m != -1 && d != 0)
    return new Date(y, m, d, hr, min, 0);
  y = 0; m = -1; d = 0;
  for (i = 0; i < a.length; ++i) {
    if (a[i].search(/[a-zA-Z]+/) != -1) {
      var t = -1;
      for (j = 0; j < 12; ++j) {
        if (Calendar.MONTH_NAMES[j].substr(0, a[i].length).toLowerCase() == a[i].toLowerCase()) { t = j; break; }
      }
      if (t != -1) {
        if (m != -1) {
          d = m+1;
        }
        m = t;
      }
    } else if (parseInt(a[i], 10) <= 12 && m == -1) {
      m = a[i]-1;
    } else if (parseInt(a[i], 10) > 31 && y == 0) {
      y = parseInt(a[i], 10);
      (y < 100) && (y += (y > 29) ? 1900 : 2000);
    } else if (d == 0) {
      d = a[i];
    }
  }
  if (y == 0)
    y = today.getFullYear();
  if (m != -1 && d != 0)
    return new Date(y, m, d, hr, min, 0);
  return today;
};

// Returns the number of days in the current month
Date.prototype.getMonthDays = function(month) {
  var year = this.getFullYear()
  if (typeof month == "undefined")
    month = this.getMonth()
  if (((0 == (year % 4)) && ( (0 != (year % 100)) || (0 == (year % 400)))) && month == 1)
    return 29
  else
    return Date.DAYS_IN_MONTH[month]
};

// Returns the number of day in the year
Date.prototype.getDayOfYear = function() {
  var now = new Date(this.getFullYear(), this.getMonth(), this.getDate(), 0, 0, 0);
  var then = new Date(this.getFullYear(), 0, 0, 0, 0, 0);
  var time = now - then;
  return Math.floor(time / Date.DAY);
};

/** Returns the number of the week in year, as defined in ISO 8601. */
Date.prototype.getWeekNumber = function() {
  var d = new Date(this.getFullYear(), this.getMonth(), this.getDate(), 0, 0, 0);
  var DoW = d.getDay();
  d.setDate(d.getDate() - (DoW + 6) % 7 + 3); // Nearest Thu
  var ms = d.valueOf(); // GMT
  d.setMonth(0);
  d.setDate(4); // Thu in Week 1
  return Math.round((ms - d.valueOf()) / (7 * 864e5)) + 1;
};