Nodejs Week Calculate toWeekDays()

Method Source Code

Date.prototype.toWeekDays = function () {
  var weekday = this.clone()
  if (!weekday.is().sunday()) {
    weekday.sunday().add(-7).days()/* w  w w.ja va  2s . c o  m*/
  }
  var week = [weekday.clone()]
  for (var day = 0; day < 6; day++) {
    week.push(weekday.add(1).days().clone())
  }
  return week
}

Date.prototype.toNextWeekDays = function () {
  return this.add(7).days().toWeekDays()
}

Date.prototype.toPreviousWeekDays = function () {
  return this.add(-7).days().toWeekDays()
}

Date.prototype.compare = function (date) {
  var year = this.getYear() - date.getYear()
  if (year > 0)
    return "In " + year + " Years"
  else if (year < 0)
    return -year + " Years Ago"
  else {
    var month = this.getMonth() - date.getMonth()
    if (month > 0)
      return "In " + month + " Months"
    else if (month < 0)
      return -month + " Months Ago"
    else {
      var week = this.getWeekOfYear() - date.getWeekOfYear()
      if (week > 0)
        return "In " + week + " Weeks"
      else if (week < 0)
        return -week + " Weeks Ago"
      else {
        if (this.getDay() - date.getDay() == 0)
          return "Today"
        else
          return this.toString("dddd")
      }
    }
  }
}

Related

1. getStudyWeek()

   Date.prototype.getStudyWeek = function () {
     var inc = (this.getDay() == 6) ? 1 : 0;
     return this.getWeek() + inc;
   };
   

2. moveToBeginOfWeek(weekStart)

   Date.prototype.moveToBeginOfWeek = function(weekStart)
       if (this.getDay() != weekStart) {
           this.moveToDayOfWeek(weekStart, -1);
       return this;
   };
   

3. moveToEndOfWeek(weekStart)

   Date.prototype.moveToEndOfWeek = function(weekStart)
       var weekEndDay = weekStart + 6;
       if (weekEndDay > 6) {
           weekEndDay -= 7;
       if (this.getDay() != weekEndDay) {
           this.moveToDayOfWeek(weekEndDay, 1);
       return this;
   };
   

4. offsetByWeek(offset)

   Date.prototype.offsetByWeek = function(offset) {
       this.setTime(this.getTime() + offset * (7 * 24 * 60 * 60 * 1000));
       return this;
   };
   

5. subWeeks(value)

   Date.prototype.subWeeks = function(value) {
     this.subDays(value * 7);
     return this;
   };
   

6. toWeekEnd(startsFromSunday)

   Date.prototype.toWeekEnd = function (startsFromSunday) {
       var dayOfWeek = this.getDay();
       if (startsFromSunday) {
           return this.addDays(6 - dayOfWeek);
       if (dayOfWeek == 0) {
           dayOfWeek = 7;
       return this.addDays(7 - dayOfWeek);
   ...
   

7. toWeekStart(startsFromSunday)

   Date.prototype.toWeekStart = function (startsFromSunday) {
       var dayOfWeek = this.getDay();
       if (startsFromSunday) {
           return this.addDays(-dayOfWeek);
       if (dayOfWeek == 0) {
           dayOfWeek = 7;
       return this.addDays(1 - dayOfWeek);
   ...
   

8. weekNo()

   var firstMonday = new Date(1970, 0, 5).getTime()
   Date.prototype.weekNo = function() {
     var _date = new Date(this)
     _date.setHours(0,0,0,0)
     _date.setDate(_date.getDate() - (_date.getDay() || 7))
     var weekNo = Math.ceil((((_date - firstMonday) / 86400000) + 1) / 7)
     return weekNo
   Date.prototype.weekNoRelative = function() {
   ...
   

9. weekNumber()

   Date.prototype.weekNumber = function() {
      var MaDate = this;
      var mm = MaDate.getMonth(), jj = MaDate.getDate();
      var annee = MaDate.getFullYear();
      var NumSemaine = 0,
      ListeMois = new Array(31,28,31,30,31,30,31,31,30,31,30,31);
      if (annee %4 == 0 && annee %100 !=0 || annee %400 == 0) {ListeMois[1]=29};
      var TotalJour=0;
      for(cpt=0; cpt<mm; cpt++){TotalJour+=ListeMois[cpt];}
   ...