94 lines
2.5 KiB
Lua
94 lines
2.5 KiB
Lua
local callbackResponses = {}
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local currentRequestId = 0
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local callbacks = {}
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-- register new callback
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function Register(name, cb)
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callbacks[name] = cb
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end
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-- trigger callback
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function Trigger(name, playerId, ...)
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return TriggerWithTimeout(name, playerId, 5000, ...)
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end
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-- trigger callback with custom timeout
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function TriggerWithTimeout(name, playerId, timeout, ...)
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-- set id for current request
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local requestId = currentRequestId
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-- advance next request id
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currentRequestId = currentRequestId + 1
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if (currentRequestId >= 65536) then
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currentRequestId = 0
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end
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-- create request name from callback name and request id
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local requestName = name .. tostring(requestId)
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-- initialize callback response
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callbackResponses[requestName] = true
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-- send data to client
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TriggerClientEvent("KI:cc", playerId, name, requestId, { ... })
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-- await cb response
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local timer = GetGameTimer()
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while (callbackResponses[requestName] == true) do
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Citizen.Wait(0)
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if (GetGameTimer() > timer + timeout) then
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-- timed out
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print("^1[ERROR] ClientCallback \"" .. name .. "\" timed out after " .. tostring(timeout) .. "ms!")
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callbackResponses[requestName] = "ERROR"
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end
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end
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-- return nil if error occurred
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if (callbackResponses[requestName] == "ERROR") then
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return nil
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end
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-- return unpacked data
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local data = callbackResponses[requestName]
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callbackResponses[requestName] = nil
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return table.unpack(data)
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end
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RegisterServerEvent("KI:sc")
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AddEventHandler("KI:sc", function(name, requestId, data)
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local src = source
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local requestName = name .. tostring(requestId)
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if (callbacks[name] ~= nil) then
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-- execute callback function and return its result
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local result = { callbacks[name](src, table.unpack(data)) }
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TriggerClientEvent("KI:scResponse", src, requestName, result)
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else
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-- callback does not exist
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print("^1[ERROR] ServerCallback \"" .. name .. "\" does not exist!")
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TriggerClientEvent("KI:scDoesNotExist", src, requestName, name)
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end
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end)
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RegisterServerEvent("KI:ccResponse")
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AddEventHandler("KI:ccResponse", function(requestName, data)
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if (callbackResponses[requestName] ~= nil) then
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-- receive data
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callbackResponses[requestName] = data
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end
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end)
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RegisterServerEvent("KI:ccDoesNotExist")
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AddEventHandler("KI:ccDoesNotExist", function(requestName, name)
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if (callbackResponses[requestName] ~= nil) then
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callbackResponses[requestName] = "ERROR"
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print("^1[ERROR] ClientCallback \"" .. name .. "\" does not exist!")
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end
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end)
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