Date element date enabling last thursdayin calendar

[jbadiag]

Hi, I wrote this script in javascript for element date to enable only last thursday of the month, but I don't know what I'm doing wrong:

var dia = date.getDate();
var currentTime = new Date(); 
var currentDay = currentTime.getDay(); 
var dayOfWeek = 4; // 0 = Sun, 3 = Wed, 6 = Sat 
var daysBack, pastDate, djous; 
if (currentDay > dayOfWeek) { 
  daysBack = currentDay - dayOfWeek; 
} 
else { 
  daysBack = (7 - dayOfWeek) + currentDay; 
} 
// Convert days back to milliseconds 
// days * num hours in a day * num mins in an hour * num sec in a min * num ms in a sec 
daysBack = daysBack * 24 * 60 * 60 * 1000; 
pastDate = new Date(currentTime.getTime() - daysBack);
dijous = pastDate.getDate();

if (dia == dijous){
  result = false; }
  else {
    result = true;
  }

It only shows last thursday but in the next month the result is not the same. Can I use any other var like date in the calendar? any solution?
Thanks

 

[cheesegrits]

Try ...

var lastThursday = new Date(date);
lastThursday.setDate(lastThursday.getLastDayOfMonth());
while (lastThursday.getDay() != 4) {
   lastThursday.setDate(lastThursday.getDate() - 1);
}
var result = date.getDate() != lastThursday.getDate();

What that should do is set lastThursday to be the same as 'date' (the day being tested). Then set that to the last day of the month. Then loop around taking one day off it, until the day of the week is 4. That gives us the last Thursday. Then test that against the day of the month of 'date'.

That's off the top of my head, haven't tested it, but should work.

-- hugh

 

[cheesegrits]

Did this work? I'm interested in knowing if that code works, as I'll probably put it in the wiki as an example if it does.

-- hugh

 

[jbadiag]

Hi, sorry for my delay. YES! it worked. Thanks so much!

 

[cheesegrits]

As punishment for your tardiness, would you mind writing it up in the Wiki section for the date element? I think it's a pretty good example. Not a biggie if you don't feel like it, but I'd appreciate it.

Hugh


Sent from my Nexus 7 using Tapatalk

 

[jbadiag]

Yes, of course i'll do it now, but to do it more difficult, can we do the same with the second thursday (and the last as well, like now)?
Please tell me how to write it in the wiki
Thanks Cheesegrits

 

[cheesegrits]

You should be able to edit this page (button top right)

http://fabrikar.com/forums/index.php?wiki/date-element/#advanced

... and just copy the formatting from the existing examples.

So do you mean you want to have both the second and the last Thursday enabled on the same month?

-- hugh

 

[jbadiag]

yes, both in the same month (and I'll put your name on my christmas tree )

 

[cheesegrits]

I think this should do it ...

var result = true;

var secondThursday = new Date(date);
thursdays=0; 
secondThursday.setDate(1); 
while (thursdays <2) {
   secondThursday.setDate(secondThursday.getDate() + 1);
   if (secondThursday.getDay() == 4) {
      thursdays++;
   }
}

if (date.getDate() === secondThursday.getDate()) {
   result = false;
}
else {
   var lastThursday = new Date(date);
   lastThursday.setDate(lastThursday.getLastDayOfMonth());
   while (lastThursday.getDay() != 4) {
      lastThursday.setDate(lastThursday.getDate() - 1);
   }
   if (date.getDate() === lastThursday.getDate()) {
      result = false;
   }
}

Which does a similar test to see if date is the second Thursday. If it is, set result to false (so don't disable), and don't bother working out the last Thursday. If it's not the second Thursday, go ahead and test to see if it's the first Thursday. If it's neither, result will be true (set in the first line and not changed) so date gets disabled.

Haven't tested it.

-- hugh

 

[jbadiag]

Yes, it works perfectly.
I've put the code in the Wiki now.
http://fabrikar.com/forums/index.php?wiki/select-second-and-last-thursday-in-datepicker/
Thanks Cheesegrits.
You saved me lots of time. Have a happy new year

 

[jbadiag]

Hi again, after installing last version of fabrik 3.4.1 in joomla 3.4.8 this javascript code does not work
Tried to see what happen with firebug and I give an error. Attaching image.
Please help

 

[cheesegrits]

Hmmm, strange. That's part of the advanced date format JS, which is a 3rd party lib. No idea why or how the minified JS would break in our release, as we don't minify it.

Anyway, I went ahead and updated the whole datejs lib, which also added language handling for it (so it'll now support reverse formatting "lundi 23 avril", etc).

You'll need to update from github to get the fix.

-- hugh

 

[jbadiag]

It seems that the problem has solved updating from github. Thanks again