46 lines
1.2 KiB
Lua
46 lines
1.2 KiB
Lua
local statemonitor={}
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local callbacks={}
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local function ternary(val, t, f)
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if val then return t else return f end
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end
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--- Deregister a callback
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---@param name string Name of callback
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function statemonitor.deregister(name)
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callbacks[name] = nil
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end
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--- Register a callback to a function
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--Registers a callback to run when a check funciton evaluates to true
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---@param name string Name of callback
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---@param check function Function to evaluate
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---@param callback function Callback to run when true
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---@param frequency? integer Frequency to run the check, in ticks (default 5)
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---@param once? boolean Whether the callback should be deregistered after running once, default true
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function statemonitor.register(name, check, callback, frequency, once)
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frequency=frequency or 5
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once=ternary(once ~= nil, once, true)
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assert(type(callback)=="function")
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assert(type(check)=="function")
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callbacks[name] = {check=check, callback=callback, f=frequency,
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deregister=once}
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end
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local function tick()
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for k, v in pairs(callbacks) do
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if world.getTimeOfDay() % v.f and v.check() then
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v.callback()
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if v.deregister then
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statemonitor.deregister(k)
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end
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end
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end
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end
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events.TICK:register(tick, "nulllib.statemonitor")
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return statemonitor
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