Cron in "if function"

Setup, Configuration and Use Scripts & Rules
1

hello,

I need an if function for a day of the year.
Is it possible to do something like this?

rule "Test"
when
	Item testswitch received update ON
then
	if(Time cron == * * * 18 9 ? *){ //if it is 18 september
	//do some stuff
	}
	if(Time cron == * * * 19 9 ? *){ // if it is 19 september
	//do some stuff
	}
end

how do i do a thing like this?

2

No. But you can do something with Joda’s DateTime now.

    val month = now.getMonthOfYear
    val day = now.getDayOfMonth

    switch(month){
        case 9: {
            switch(day) {
                case 18: {
                    // do some stuff
                }
                case 19: {
                    // do some stuff
                }
            }
        }
    }

I used switch statements assuming you would have a lot of these cases. If not the if equivalent is:

    val month = now.getMonthOfYear
    val day = now.getDayOfMonth

    if(month == 9 && day == 18) {
        // do some stuff
    }
    else if(month == 9 && day == 19) {
        // do some stuff
    }
3

Thank you for your clear repply and showing some alternatives!

In the meanwhile I allready succesfully tested this (thanks to google):

rule "Test"
when
	Item testbutton received update ON
then
	if(now.getDayOfMonth == 19 && now.getMonthOfYear == 9) {
        //do some stuff
    }
end
4

Hi Rich, I too would like to use Cron in a if statement, but it appears not possible.

I want to define a rule that checks if its Nov, Dec, Jan , Feb, March or April and would trigger in every day of those months and then does stuff BUT, I’m using a Channel trigger with an offset as suggested by @rossko57 [SOLVED] Astro binding - hours until / after sunrise as I want this to only run 1 hour before sunrise.

I got about this far before thinking this isn’t the right way!

I guess a proxy set using Cron, and then a check for that proxy being ON in my channel trigger is the go. Anything that may make more sense?

rule "Turn on Flag in Summer"
when
        Time cron "0 0 0 ? JAN,FEB,MAR,APR,NOV,DEC * *"
then
    Summer.sendCommand(ON)
end

rule "Turn on Sunrise flag 1Hr prior to Sunrise"
when
        Channel 'astro:sun:timed:set#event' triggered START
then
        if(Summer.state == ON){
          gAllLivingLevelShutters.sendCommand(0)
}
end

And the Astro offset thing


astro:sun:timed       "1hr Before Offset" [ geolocation="-33.78844,151.22889,0", interval=60 ]{
  Channels:
    Type rangeEvent : set#event [
      offset=-60]
}
5

Jumping in here:

Both of your rules would run once every day, however you are never setting “summer” to off .

You could use JodaTime as shown by @rlkoshak and combine both into one rule.

rule "Turn on Sunrise flag 1Hr prior to Sunrise"
when
        Channel 'astro:sun:timed:set#event' triggered START
then
    val month = now.getMonthOfYear       
    if(month < 5 || month >10) {
          gAllLivingLevelShutters.sendCommand(0)
    }
end
1 Like
6

Lovely! Ugh so much to learn about rules. Thanks opus, that’s a nice solution.

To take this further, I’d like to open them again at 11am.

rule "open shutters during summer at 11am"
when
        Time cron "0 0 11 ? JAN,FEB,MAR,APR,NOV,DEC * *"
then
   if(gAllLivingLevelShutters.state =! 100){
          gAllLivingLevelShutters.sendCommand(100)
    }
end