Disabling sytems

[giladgray]

Would be great to mark a system as disabled, say after it runs once.

pocket.system 'new-level', (pocket) ->
  # create a new level
  pocket.keys [badguys...]
  pocket.keys [obstacles...]
  @disable()
pocket.system 'is-level-won', (pocket) ->
  if level is 'beaten'
    pocket.system('new-level').enable()

Note that here a system can have zero dependencies.

[giladgray]

# false after the name disables system so it'll only be run when asked
pocket.system 'new-level', false, (pocket) ->
  # create a new level
  pocket.keys [badguys...]
  pocket.keys [obstacles...]
pocket.system 'is-level-won', (pocket) ->
  if level is 'beaten'
    # provide a way to run a single system on command
    pocket.runSystem('new-level')

[kirbysayshi]

One way I considered approaching "disabled" systems was just to remove them from the list of active systems.

Another is for them to no longer have valid dependencies by deleting a key. If you force a system to depend on an 'is-level-won' label, then deleting the key associated with the only instance of that label will also "disable" the system. But that is rather confusing to piece together.