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
}

ESX                           = nil
local HasAlreadyEnteredMarker = false
local LastZone                = nil
local CurrentAction           = nil
local CurrentActionMsg        = ''
local CurrentActionData       = {}

Citizen.CreateThread(function()
	while ESX == nil do
		TriggerEvent('esx:getSharedObject', function(obj) ESX = obj end)
		Citizen.Wait(0)
	end

	Citizen.Wait(5000)

	ESX.TriggerServerCallback('esx_shops:requestDBItems', function(ShopItems)
		for k,v in pairs(ShopItems) do
			Config.Zones[k].Items = v
		end
	end)
end)

function OpenShopMenu(zone)
	local elements = {}
	for i=1, #Config.Zones[zone].Items, 1 do
		local item = Config.Zones[zone].Items[i]

		if item.limit == -1 then
			item.limit = 100
		end

		table.insert(elements, {
			label      = item.label .. ' - <span style="color: green;">$' .. item.price .. '</span>',
			label_real = item.label,
			item       = item.item,
			price      = item.price,

			-- menu properties
			value      = 1,
			type       = 'slider',
			min        = 1,
			max        = item.limit
		})
	end

	ESX.UI.Menu.CloseAll()
	ESX.UI.Menu.Open('default', GetCurrentResourceName(), 'shop', {
		title    = _U('shop'),
		align    = 'bottom-right',
		elements = elements
	}, function(data, menu)
		ESX.UI.Menu.Open('default', GetCurrentResourceName(), 'shop_confirm', {
			title    = _U('shop_confirm', data.current.value, data.current.label_real, data.current.price * data.current.value),
			align    = 'bottom-right',
			elements = {
				{label = _U('no'),  value = 'no'},
				{label = _U('yes'), value = 'yes'}
			}
		}, function(data2, menu2)
			if data2.current.value == 'yes' then
				TriggerServerEvent('esx_shops:buyItem', data.current.item, data.current.value, zone)
			end

			menu2.close()
		end, function(data2, menu2)
			menu2.close()
		end)
	end, function(data, menu)
		menu.close()
		CurrentAction     = 'shop_menu'
		CurrentActionMsg  = _U('press_menu')
		CurrentActionData = {zone = zone}
	end)
end

AddEventHandler('esx_shops:hasEnteredMarker', function(zone)
	CurrentAction     = 'shop_menu'
	CurrentActionMsg  = _U('press_menu')
	CurrentActionData = {zone = zone}
end)

AddEventHandler('esx_shops:hasExitedMarker', function(zone)
	CurrentAction = nil
	ESX.UI.Menu.CloseAll()
end)

-- Create Blips
Citizen.CreateThread(function()
	for k,v in pairs(Config.Zones) do
		for i = 1, #v.Pos, 1 do
			local blip = AddBlipForCoord(v.Pos[i].x, v.Pos[i].y, v.Pos[i].z)
			SetBlipSprite (blip, 52)
			SetBlipDisplay(blip, 4)
			SetBlipScale  (blip, 1.0)
			SetBlipColour (blip, 2)
			SetBlipAsShortRange(blip, true)
			BeginTextCommandSetBlipName("STRING")
			AddTextComponentString(_U('shops'))
			EndTextCommandSetBlipName(blip)
		end
	end
end)

-- Display markers
Citizen.CreateThread(function()
	while true do
		Citizen.Wait(0)
		local coords = GetEntityCoords(GetPlayerPed(-1))

		for k,v in pairs(Config.Zones) do
			for i = 1, #v.Pos, 1 do
				if(Config.Type ~= -1 and GetDistanceBetweenCoords(coords, v.Pos[i].x, v.Pos[i].y, v.Pos[i].z, true) < Config.DrawDistance) then
					DrawMarker(Config.Type, v.Pos[i].x, v.Pos[i].y, v.Pos[i].z, 0.0, 0.0, 0.0, 0, 0.0, 0.0, Config.Size.x, Config.Size.y, Config.Size.z, Config.Color.r, Config.Color.g, Config.Color.b, 100, false, true, 2, false, false, false, false)
				end
			end
		end
	end
end)

-- Enter / Exit marker events
Citizen.CreateThread(function()
	while true do
		Citizen.Wait(10)
		local coords      = GetEntityCoords(GetPlayerPed(-1))
		local isInMarker  = false
		local currentZone = nil

		for k,v in pairs(Config.Zones) do
			for i = 1, #v.Pos, 1 do
				if(GetDistanceBetweenCoords(coords, v.Pos[i].x, v.Pos[i].y, v.Pos[i].z, true) < Config.Size.x) then
					isInMarker  = true
					ShopItems   = v.Items
					currentZone = k
					LastZone    = k
				end
			end
		end
		if isInMarker and not HasAlreadyEnteredMarker then
			HasAlreadyEnteredMarker = true
			TriggerEvent('esx_shops:hasEnteredMarker', currentZone)
		end
		if not isInMarker and HasAlreadyEnteredMarker then
			HasAlreadyEnteredMarker = false
			TriggerEvent('esx_shops:hasExitedMarker', LastZone)
		end
	end
end)

-- Key Controls
Citizen.CreateThread(function()
	while true do
		Citizen.Wait(10)

		if CurrentAction ~= nil then
			ESX.ShowHelpNotification(CurrentActionMsg)

			if IsControlJustReleased(0, Keys['E']) then
				if CurrentAction == 'shop_menu' then
					OpenShopMenu(CurrentActionData.zone)
				end

				CurrentAction = nil
			end
		else
			Citizen.Wait(500)
		end
	end
end)