Add a periodic guard 'only_every'

[boc-tothefuture]

Add an additional guard type named 'only_every' that will prevent execution of the rule if it triggers again within that duration.

current:

rule 'Cycle HVAC fan for office' do 
    changed [Office_Temperature, Thermostats_Upstairs_Temp, Office_Occupied]
    run do 
        logger.debug("Turning on HVAC air cycle upstairs to balance temperature")
        Buttons_Circ_2nd.on
        last_run = now()
    end 
    only_if { (Office_Temperature - Thermostats_Upstairs_Temp).abs > '2 °F'}
    only_if Office_Occupied
    not_if  Thermostats_Upstairs_Status
    not_if Thermostats_Upstairs_Fan_Mode
    only_if { (now() - last_run) > 2.hours }
end

proposed:

rule 'Cycle HVAC fan for office' do 
    changed [Office_Temperature, Thermostats_Upstairs_Temp, Office_Occupied]
    run do 
        logger.debug("Turning on HVAC air cycle upstairs to balance temperature")
        Buttons_Circ_2nd.on
    end 
    only_if { (Office_Temperature - Thermostats_Upstairs_Temp).abs > '2 °F'}
    only_if Office_Occupied
    not_if  Thermostats_Upstairs_Status
    not_if Thermostats_Upstairs_Fan_Mode
    only_every 2.hours
end

[jimtng]

only_every gives the impression that it will perform at a regular interval similar to every. How about min_interval ?