scheduled tasks functions for nouvion

timed_functions

#usage: schedule_scheduled_task(time:Time, task_name:String, task_parameter:String)
# runs the function task_name refers to(big trouble if it doesn't refer to a function) with task_parameter.
# Will record the task to DB if the bot is shut down. Will restore to the schedule when bot is restarted.

#TODO:
# implement schedule_task(time, callback) [where time is the time at which it should run, rather than how long till it should run]
# do we have simple memory access shims for mem_load_all(key), and mem_save(key, value)? If not, we should, please write them.
# mem_delete_k_v(key, value) , this is new functionality, but greatly needed
# run reinstate_scheduled_tasks on initialization (note, may execute tasks during the call, make sure initialization is at a stage where it's ready for that)
# should work at that point.

def reinstate_scheduled_tasks
	@tasks_in_progress = {}
	for task in mem_load_all("global timed tasks")
		tstsp = task.split("::")
		time = Time.new tstsp[0]
		task = tstsp[1]
		parameter = tstsp[2]
		schedule_scheduled_task(time, task, parameter)
		mem_delete_k_v("global timed tasks", task)
	end
end

def schedule_scheduled_task(time, task, parameter)
	now = Time.now
	if time < now
		@[task](parameter)
	else
		mem_save("global timed tasks", "#{time.to_s}::#{task}::#{parameter}")
		schedule_task time, {|| @[task](parameter)}
	end
end