Updating gui slots

[Chopnex]

Description

It would be so cool and useful if you could add the possibility to define slots that would update each tick/second/minute without the need to have a while loop running inside of Skript. An example for the syntax could be:

make gui slot 1 with diamond named "%{_cooldown}%" with update 1 second

Im pretty sure you have a better syntax but the idea is that the above gui slot will update each second until the inventory is closed by the player (or until the amount of viewers in a global gui = 0). This would make it a lot easier and give better performance when having dynamic items to show money, cooldowns and similar.

It could also be a feature to have the possiblity to choose what to do each time the item is updated:

make gui slot 1 with diamond named "%{_cooldown}%" with update 1 second:
on update:
if {_cooldown} < 1 second:
make gui slot 1 with air

[Fusezion]

Simply for readability and a more complete example than above

set {_cooldown} to now
create a gui with virtual hopper inventory named "Update Examples":
  run on gui close:
    # this syntax is simply to fix possible crashes caused by the system
    exit all update loops
  format next gui slot with minecart named "10 seconds" with update of 1 second:
    # similar to how we do on close/on open
    on update:
      if time since {_cooldown} >= 10 seconds:
        # adding an update gui slot effect would be a good addition to this
        # not only does it fix issues with changing name of items this adds more functionality to this system
        update the gui slot with minecart with chest of lure 1 named "&aReady!"
        
        # we could even take the "update gui slot" effect even further and create a section within it
        # and have it work as below
        # edit/update
        edit the gui slot:
          set item to minecraft with chest of lure 1 named "&aReady"
          # or
          set name to "&aReady"
          set lore to "thing1", "thing2" and "thing3"
          # while normally these don't seem best I feel like having the ability to
          # edit select portions of slots is something we should add as sometimes
          # you don't want to create a whole new item stack for a repetitive action
          # but I do agree that this can seem over bearing to some

        # as you'd exist it would exist/cancel the update system
        exit update loop
      else:
        format (the gui slot) with diamond named "%difference of 10 seconds and time since {_cooldown}%"
    # optional normal click actions to make use for "exit update loop"
    # while disabling these would be good normally and allow the removal of "on update"
    # I'd prefer keeping this and simply adding a new condition to check if there's an active update
    if gui slot has active update loop: # using gui slot would be better for having multiple updates
      stop
    broadcast "", "%player% spent the last 10 hours in this gui to click a button..." and ""

While reading this I do agree this would be a nice feature to add but
as I showed above with a more complete example it adds a lot more functionality
and would be better as a whole new stable release which could take awhile before
ever being completed fully

Syntax Examples

# Sections
on update:

edit [the] %gui slot%:

# Effects
update %slot% of %gui% with %item%
format [gui] %slot% with %item% [with update [loop of] %timespan%]
exit all update loops
exit update loop

# conditions
%gui% has [any] active update loops
%slot% has active update loop

---

Yes I did realize this more or less became something I could of created a issue tracker for
and yes I never expect the "edit gui slot" section to be added but atleast the "update slot" would be nice

Didn't notice issue #114 also inquired about fixing issue with updating slots so giving credit there