esx_core/client/main.lua

local Keys = {
	["ESC"] = 322, ["F1"] = 288, ["F2"] = 289, ["F3"] = 170, ["F5"] = 166, ["F6"] = 167, ["F7"] = 168, ["F8"] = 169, ["F9"] = 56, ["F10"] = 57, 
	["~"] = 243, ["1"] = 157, ["2"] = 158, ["3"] = 160, ["4"] = 164, ["5"] = 165, ["6"] = 159, ["7"] = 161, ["8"] = 162, ["9"] = 163, ["-"] = 84, ["="] = 83, ["BACKSPACE"] = 177, 
	["TAB"] = 37, ["Q"] = 44, ["W"] = 32, ["E"] = 38, ["R"] = 45, ["T"] = 245, ["Y"] = 246, ["U"] = 303, ["P"] = 199, ["["] = 39, ["]"] = 40, ["ENTER"] = 18,
	["CAPS"] = 137, ["A"] = 34, ["S"] = 8, ["D"] = 9, ["F"] = 23, ["G"] = 47, ["H"] = 74, ["K"] = 311, ["L"] = 182,
	["LEFTSHIFT"] = 21, ["Z"] = 20, ["X"] = 73, ["C"] = 26, ["V"] = 0, ["B"] = 29, ["N"] = 249, ["M"] = 244, [","] = 82, ["."] = 81,
	["LEFTCTRL"] = 36, ["LEFTALT"] = 19, ["SPACE"] = 22, ["RIGHTCTRL"] = 70, 
	["HOME"] = 213, ["PAGEUP"] = 10, ["PAGEDOWN"] = 11, ["DELETE"] = 178,
	["LEFT"] = 174, ["RIGHT"] = 175, ["TOP"] = 27, ["DOWN"] = 173,
	["NENTER"] = 201, ["N4"] = 108, ["N5"] = 60, ["N6"] = 107, ["N+"] = 96, ["N-"] = 97, ["N7"] = 117, ["N8"] = 61, ["N9"] = 118
}

local GUI              = {}
GUI.Time               = 0
local Instance         = {}
local InstanceInvite   = nil
local InstancedPlayers = {}

function ShowNotification(msg)
	SetNotificationTextEntry('STRING')
	AddTextComponentString(msg)
	DrawNotification(0,1)
end

function GetInstance()
	return Instance
end

function CreateInstance()
	TriggerServerEvent('instance:create')
end

function EnterInstance(instance)
	TriggerServerEvent('instance:enter', InstanceInvite.host)
end

function LeaveInstance()

	if Instance.host ~= nil then
		
		if #Instance.players > 1 then
			TriggerEvent('esx:showNotification', 'Vous avez quitté l\'instance')
		end

		TriggerServerEvent('instance:leave', Instance.host)
	end

end

function InviteToInstance(player, pos)
	TriggerServerEvent('instance:invite', Instance.host, player, pos)
end

AddEventHandler('instance:get', function(cb)
	cb(GetInstance())
end)

AddEventHandler('instance:create', function()
	CreateInstance()
end)

AddEventHandler('instance:enter', function(instance)
	EnterInstance(instance)
end)

AddEventHandler('instance:leave', function()
	LeaveInstance()
end)

AddEventHandler('instance:invite', function(player, pos)
	InviteToInstance(player, pos)
end)

RegisterNetEvent('instance:onData')
AddEventHandler('instance:onData', function(instance)
	Instance = instance
end)

RegisterNetEvent('instance:onInstancedPlayersData')
AddEventHandler('instance:onInstancedPlayersData', function(instancedPlayers)
	InstancedPlayers = instancedPlayers
end)

RegisterNetEvent('instance:onInvite')
AddEventHandler('instance:onInvite', function(instance, pos)
	
	InstanceInvite = {
		host = instance,
		pos  = pos
	}

	Citizen.CreateThread(function()
		
		Citizen.Wait(10000)

		if InstanceInvite ~= nil then
			ShowNotification('Invitation expirée')
			InstanceInvite = nil
		end

	end)

end)

-- Input invites
Citizen.CreateThread(function()
	while true do

		Wait(0)

		if InstanceInvite ~= nil then
			SetTextComponentFormat('STRING')
			AddTextComponentString('Appuyez sur ~INPUT_CONTEXT~ pour entrer dans l\'instance')
			DisplayHelpTextFromStringLabel(0, 0, 1, -1)
		end

	end
end)

-- Controls
Citizen.CreateThread(function()
	while true do

		Wait(0)

		if InstanceInvite ~= nil and IsControlPressed(0, Keys['E']) and (GetGameTimer() - GUI.Time) > 150 then

			local playerPed = GetPlayerPed(-1)

			EnterInstance(InstanceInvite.host)

			SetEntityCoords(playerPed,  InstanceInvite.pos.x,  InstanceInvite.pos.y,  InstanceInvite.pos.z)

			ShowNotification('Vous êtes entré dans l\'instance')
			
			InstanceInvite = nil
			GUI.Time       = GetGameTimer()

		end

	end

end)

-- Instance players
Citizen.CreateThread(function()

	while true do

		Wait(0)

		if Instance.host ~= nil then

			local playerPed = GetPlayerPed(-1)

			for i=0, 32, 1 do
					
				local found = false

				for j=1, #Instance.players, 1 do
					
					instancePlayer = GetPlayerFromServerId(Instance.players[j])

					if i == instancePlayer then
						found = true
					end

				end

				if not found then

					local otherPlayerPed = GetPlayerPed(i)

					SetEntityLocallyInvisible(otherPlayerPed)
					SetEntityNoCollisionEntity(playerPed,  otherPlayerPed,  true)
				end

			end

		else

			local playerPed = GetPlayerPed(-1)

			for i=0, 32, 1 do
					
				local found = false

				for j=1, #InstancedPlayers, 1 do
					
					instancePlayer = GetPlayerFromServerId(InstancedPlayers[j])

					if i == instancePlayer then
						found = true
					end

				end

				if found then

					local otherPlayerPed = GetPlayerPed(i)

					SetEntityLocallyInvisible(otherPlayerPed)
					SetEntityNoCollisionEntity(playerPed,  otherPlayerPed,  true)
				end

			end

		end

	end

end)