Show Remaining Time of a Timer

[rlkoshak (Rich Koshak)]

Design Pattern: Looping Timers

Edit: Update for OH 4 Please see https://community.openhab.org/t/design-pattern-what-is-a-design-pattern-and-how-do-i-use-them/40319 to understand the scope and purpose of this and other Design Patterns. Problem Statement Often one may require a loop in a Rule, to wait for some event to occur or some state to change before doing something. For example, if a door is opened for a long time to send an alert every hour until the door is closed. Concept [image] Use a Timer that reschedules itself…

It would look something like

    Item AutoIrrigation changed to ON
then
    MinutesRemainingOnTimer.postUpdate(TotalRuntime.state)
    timer = createTimer(now.plusMinutes(1), [ |
        var remain = MinutesRemainingOnTimer.state - 1
        if( remain < 0 ) remain = 0
        MinutesRemainingOnTimer.postUpdate(remain)
        if( remain > 0) timer.reschedule(now.plusMinutes(1))
    ]
End